167 results on '"de Almeida LA"'
Search Results
2. Emerging Metal-Halide Perovskite Materials for Enhanced Solar Cells and Light-Emitting Applications
- Author
-
Pinto, Felipe Moreira, de Conti, Mary Carmen Mate Durek, Dey, Swayandipta, Velilla, Esteban, Taft, Carlton A., de Almeida La Porta, Felipe, Taft, Carlton A., editor, and de Lazaro, Sergio R., editor
- Published
- 2022
- Full Text
- View/download PDF
3. Influence of structural disorder on the photocatalytic properties of ZnS nanocrystals prepared by the one-pot solvothermal approach
- Author
-
Victoria Gabriela Benatto, Guilherme da Silva Lopes Fabris, Julio Ricardo Sambrano, Carlton Anthony Taft, and Felipe de Almeida La Porta
- Subjects
zns ,density functional theory ,solvothermal processing ,photocatalysis properties ,electronic structure ,Chemistry ,QD1-999 - Abstract
This study focuses on the impact of the sulfur vacancies on the photocatalytic response of the ZnS nanocrystals synthesized by solvothermal method varying the concentration of zinc acetate/thiourea precursors. XRD patterns show that these samples have a hexagonal structure with different degrees of crystallinity, varying the crystallite size from 2.48 to 2.85 nm. The UV-Vis data reveals an absorption peak (at about 320 nm) characteristic of ZnS nanocrystals. As a result, a decrease in the bandgap value of these materials was observed from 3.78 to 3.62 eV. In principle, a comparison of these results and theoretical calculations reveals the formation of intermediate levels inside the bandgap due to structural polarization. These findings also corroborate the zeta potential measured for these samples, evidenced by an increase of positive charge of ZnS surfaces. Also, the low Miller-index surfaces, such as (100), (110) and (0001), were investigated by periodic density functional theory calculations, in nice agreement with the experimental data. A photocatalysis mechanism was investigated and confirmed the formation of reactive oxygen species.
- Published
- 2022
- Full Text
- View/download PDF
4. Emerging Metal-Halide Perovskite Materials for Enhanced Solar Cells and Light-Emitting Applications
- Author
-
Pinto, Felipe Moreira, primary, de Conti, Mary Carmen Mate Durek, additional, Dey, Swayandipta, additional, Velilla, Esteban, additional, Taft, Carlton A., additional, and de Almeida La Porta, Felipe, additional
- Published
- 2022
- Full Text
- View/download PDF
5. Effect of drug metabolism in the treatment of SARS-CoV-2 from an entirely computational perspective
- Author
-
de Jesus, João Paulo Almirão, Assis, Letícia Cristina, de Castro, Alexandre Alves, da Cunha, Elaine Fontes Ferreira, Nepovimova, Eugenie, Kuca, Kamil, de Castro Ramalho, Teodorico, and de Almeida La Porta, Felipe
- Published
- 2021
- Full Text
- View/download PDF
6. Application of factorial model for an optimization of partial replacement of feldspar by talc on the sintering process
- Author
-
Robson Couto da Silva, Felipe de Almeida La Porta, Graciela Aparecida dos Santos Silva, Renato Mandalozzo Tebcherani, Evaldo Toniolo Kubaski, Estevam Augusto Bonfante, and Sergio Mazurek Tebcherani
- Subjects
Marketing ,Materials Chemistry ,Ceramics and Composites ,Condensed Matter Physics - Published
- 2023
- Full Text
- View/download PDF
7. Polymyxin B Activity Rescue by (−)-Camphene-Based Thiosemicarbazide Against Carbapenem-Resistant Enterobacterales
- Author
-
Bruna Renata Silva, Paula Assis Queiroz, Pedro Henrique Rodrigues do Amaral, Beatriz Cardoso de Freitas, Alison Fernando Stocco, Eloisa Gibin Sampiron, Fábio Vandresen, Maria Cristina Bronharo Tognim, Katiany Rizzieri Caleffi-Ferracioli, Regiane Bertin de Lima Scodro, Rosilene Fressatti Cardoso, Felipe de Almeida La Porta, and Vera Lucia Dias Siqueira
- Subjects
Microbiology (medical) ,Pharmacology ,Immunology ,Microbiology - Published
- 2022
- Full Text
- View/download PDF
8. Zinc-Based Nanoparticles Reduce Bacterial Biofilm Formation
- Author
-
Bianchini Fulindi, Rafael, primary, Domingues Rodrigues, Juliana, additional, Lemos Barbosa, Thulio Wliandon, additional, Goncalves Garcia, Ariana D., additional, de Almeida La Porta, Felipe, additional, Pratavieira, Sebastião, additional, Chiavacci, Leila Aparecida, additional, Pessoa Araújo Junior, João, additional, da Costa, Paulo Inácio, additional, and Martinez, Luis R., additional
- Published
- 2023
- Full Text
- View/download PDF
9. Novel Gd(OH)3, GdOOH and Gd2O3 Nanorods: Microwave-Assisted Hydrothermal Synthesis and Optical Properties
- Author
-
Maciel Salomão de Almeida, Maria Aparecida Bezerra dos Santos, Rosana de Fátima Gonçalves, Maria Rita de Cássia Santos, Ana Paula de Azevedo Marques, Elson Longo, Felipe de Almeida La Porta, Ivo Mateus Pinatti, Maya Dayana Penha Silva, and Mario Junior Godinho
- Subjects
Gd(OH)3 ,GdOOH ,Gd2O3 ,nanorods ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
We present a study of the controlled synthesis and optical properties of single-crystals Gd(OH)3, GdOOH and Gd2O3 nanorods. In this work, Gd(OH)3 nanorods were synthesized by a simple and fast microwave-assisted hydrothermal method. This process combined with the thermal decomposition oxidation of Gd(OH)3 nanorods as precursors enabled the preparation of single-crystalline GdOOH and Gd2O3 structures with well-defined morphology at low temperatures. The crystal structure dependence on the optical properties was investigated. We observed a green shift effect on the photoluminescence (PL) emission spectra from Gd(OH)3 to Gd2O3 nanorods, which can be attributed to different types of surface defects, as well as intrinsic properties that contribute significantly to the modified PL behavior.
- Published
- 2016
- Full Text
- View/download PDF
10. Zinc-Based Nanoparticles Reduce Bacterial Biofilm Formation
- Author
-
Rafael Bianchini Fulindi, Juliana Domingues Rodrigues, Thulio Wliandon Lemos Barbosa, Ariana D. Goncalves Garcia, Felipe de Almeida La Porta, Sebastião Pratavieira, Leila Aparecida Chiavacci, João Pessoa Araújo Junior, Paulo Inácio da Costa, and Luis R. Martinez
- Subjects
Microbiology (medical) ,Infectious Diseases ,General Immunology and Microbiology ,Ecology ,Physiology ,Genetics ,Cell Biology - Abstract
Zinc (Zn)-based nanoparticles (NPs) can be potentially used in medical and food preservation applications. As proof of principle, we investigated the bactericidal and antibiofilm activity of zinc oxide (ZnO) and zinc sulfide (ZnS) NPs against medically important bacteria.
- Published
- 2023
- Full Text
- View/download PDF
11. Polymyxin B Activity Rescue by (-)-Camphene-Based Thiosemicarbazide Against Carbapenem-Resistant
- Author
-
Bruna Renata, Silva, Paula Assis, Queiroz, Pedro Henrique Rodrigues do, Amaral, Beatriz Cardoso de, Freitas, Alison Fernando, Stocco, Eloisa Gibin, Sampiron, Fábio, Vandresen, Maria Cristina Bronharo, Tognim, Katiany Rizzieri, Caleffi-Ferracioli, Regiane Bertin de Lima, Scodro, Rosilene Fressatti, Cardoso, Felipe de Almeida, La Porta, and Vera Lucia Dias, Siqueira
- Subjects
Drug Combinations ,Carbapenems ,Microbial Sensitivity Tests ,Polymyxin B ,Anti-Bacterial Agents ,Bicyclic Monoterpenes ,Hydrogen - Abstract
Due to the significant shortage of therapeutic options for carbapenem-resistant
- Published
- 2022
12. Emerging Metal-Halide Perovskite Materials for Enhanced Solar Cells and Light-Emitting Applications
- Author
-
Felipe Moreira Pinto, Mary Carmen Mate Durek de Conti, Swayandipta Dey, Esteban Velilla, Carlton A. Taft, Felipe de Almeida La Porta, and Molecular Biosensing for Med. Diagnostics
- Abstract
Metal-halide perovskite materials have fascinating physical properties, which have attracted significant attention for their potential use in many emerging optoelectronic technologies. These scientific efforts, in turn, led to a remarkable increase in a few years of their power conversion efficiency (PCE) as well as external quantum efficiencies (EQE) of these emerging metal-halide perovskite-based devices. Furthermore, solution-based methods have widely been developed to simple manufacturing of such multi-functional materials with controlled particle shape and size and, in additional, offer excellent opportunities to improve their physical properties at a relatively low cost. This chapter compiled the current progress in understanding the structure-composition-property relationship of solar cells and light-emitting devices based on emerging metal-halide perovskite materials synthetized by spin-coating technique. A particular emphasis will be given to the advancement of lead-free halide perovskite materials and addressing the main challenges related to commercializing this technology in the future.
- Published
- 2022
13. Nitro derivatives of quinoline and quinoline N-oxide as low-cost alternative for the treatment of SARS-CoV-2 infection
- Author
-
Assis, Letícia Cristina, primary, Castro, Alexandre Alves de, additional, Jesus, João Paulo Almirão de, additional, Nepovimova, Eugenie, additional, Kuca, Kamil, additional, Ramalho, Teodorico de Castro, additional, and Porta, Felipe de Almeida La, additional
- Published
- 2020
- Full Text
- View/download PDF
14. List of contributors
- Author
-
Naveed A. Abbasi, Khalil Abnous, Ozgur B. Akan, Javeed Akhtar, Marcelo S. Alencar, Mona Alibolandi, Mainor Cruz Alvarado, Luís Henrique Amorin, Fazli Rabbi Awan, Sadia Z. Bajwa, Nurgul K. Bakirhan, Patricia Bazán, Cesar Benavente-Peces, Purvi Bhatt, Haq Nawaz Bhatti, Glenda Biasotto, Pascal Bouvry, Emerson Rodrigues Camargo, Andrea Capponi, Patrick Carey, Oktay Cetinkaya, Vandna Chaudhary, Fernando Henrique Cincotto, Meltem Civas, Tina Daghooghi, Adil Denizli, May El Barachi, Masoomeh Esmaelpourfarkhani, Károly Farkas, Ali Farmani, Anderson A. Felix, Claudio Fiandrino, Wendy Flores-Fuentes, Iguatemi E. Fonseca, Cristobal Garcia, Michael Gebhard, Maryam Ghodrati, Rinky Ghosh, Ruan D. Gomes, Félix F. Gonzalez-Navarro, Luiz Fernando Gorup, Longhua Guo, null Habib-ur-Rehman, Essia Hannachi, Hunza Hayat, Daniel Hernández-Balbuena, Hamideh Imanzadeh, Nirav Joshi, Palanisamy Kannan, Leyla Karadurmus, Sariye Irem Kaya, Waqas Khalid, Tooba Khan, Waheed S. Khan, Dzmitry Kliazovich, Anna Kornyushchenko, Felipe de Almeida La Porta, Marino E. Leon, Yongxin Li, Jenshan Lin, Liwei Lin, Lars Lindner, Brian C. Lobo, Ritu Malik, Ali Mir, Jesús E. Miranda-Vega, Shoaib Mohammad, David E. Motaung, Azzam Mourad, Mohammad Hazhir Mozaffari, Atefeh Nazari, Dina N. Oosthuizen, Wael Al Orabi, Marcelo O. Orlandi, Fatemeh Oroojalian, Goksu Ozcelikay, Sibel A. Ozkan, Gautam Patel, S.J. Pearton, Vyacheslav Perekrestov, Vineeta Pillai, Diego V. Queiroz, Sawsan Abdul Rahman, Naomi Ramesar, Mohammad Ramezani, Neha Kanwar Rawat, Fan Ren, Moisés Rivas-López, Julio C. Rodríguez-Quiñonez, Artur Rydosz, Yeşeren Saylan, Thiago Sequinel, Oleg Sergiyenko, Ayesha Shaheen, Priyanka Singh, Yassine Slimani, Mohammad Soroosh, Pedro H. Suman, Hendrik C. Swart, Ali Sınag, Seyed Mohammad Taghdisi, Ayesha Taj, Haoran Tang, Vijay K. Tomer, Irina Trendafilova, Zamaswazi P. Tshabalala, Vera Tyrsa, Hao Wang, Gerhard Wilde, R.D.S. Yadava, Jiancheng Yang, Rezvan Yazdian-Robati, Sumaira Younis, and Rabisa Zia
- Published
- 2020
- Full Text
- View/download PDF
15. Emerging Research in Science and Engineering Based on Advanced Experimental and Computational Strategies
- Author
-
Felipe de Almeida La Porta, Carlton A. Taft, Felipe de Almeida La Porta, and Carlton A. Taft
- Subjects
- Biomedical materials, Nanostructured materials, Force and energy
- Abstract
In this book, the authors discuss some of the main challenges and new opportunities in science and engineering research, which involve combining computational and experimental approaches as a promising strategy for arriving at new insights into composition–structure–property relations, even at the nanoscale. From a practical standpoint, the authors show that significant improvements in the material/biomolecular foresight by design, including a fundamental understanding of their physical and chemical properties, are vital and will undoubtedly help us to reach a new technological level in the future.
- Published
- 2020
16. Theoretical insights into the effect of halogenated substituent on the electronic structure and spectroscopic properties of the favipiravir tautomeric forms and its implications for the treatment of COVID-19.
- Author
-
Assis, Letícia Cristina, Alves de Castro, Alexandre, Almirão de Jesus, João Paulo, Ferreira da Cunha, Elaine Fontes, Nepovimova, Eugenie, Krejcar, Ondrej, Kuca, Kamil, Castro Ramalho, Teodorico, and de Almeida La Porta, Felipe
- Published
- 2021
- Full Text
- View/download PDF
17. Recent Advances in Complex Functional Materials : From Design to Application
- Author
-
Elson Longo, Felipe de Almeida La Porta, Elson Longo, and Felipe de Almeida La Porta
- Subjects
- Nanostructured materials
- Abstract
In this book we explore new approaches to understanding the physical and chemical properties of emergent complex functional materials, revealing a close relationship between their structures and properties at the molecular level. The primary focus of this book is on the ability to synthesize materials with a controlled chemical composition, a crystallographic structure, and a well-defined morphology. Special attention is also given to the interplay of theory, simulation and experimental results, in order to interconnect theoretical knowledge and experimental approaches, which can reveal new scientific and technological directions in several fields, expanding the versatility to yield a variety of new complex materials with desirable applications and functions. Some of the challenges and opportunities in this field are also discussed, targeting the development of new emergent complex functional materials with tailored properties to solve problems related to renewable energy, health, and environmental sustainability. A more fundamental understanding of the physical and chemical properties of new emergent complex functional materials is essential to achieving more substantial progress in a number of technological fields. With this goal in mind, the editors invited acknowledged specialists to contribute chapters covering a broad range of disciplines.
- Published
- 2017
18. Electronic, structural, optical, and photocatalytic properties of graphitic carbon nitride
- Author
-
Amorin, Luís Henrique, primary, Suzuki, Victor Yuudi, additional, de Paula, Natália Herédia, additional, Duarte, José Leonil, additional, da Silva, Marco Aurélio Toledo, additional, Taft, Carlton Anthony, additional, and de Almeida La Porta, Felipe, additional
- Published
- 2019
- Full Text
- View/download PDF
19. Red noise versus planetary interpretations in the microlensing event OGLE-2013-BLG-446
- Author
-
Bachelet, E, Bramich, DM, Han, C, Greenhill, J, Street, RA, Gould, A, D'Ago, G, AlSubai, K, Dominik, M, Jaimes, RF, Horne, K, Hundertmark, M, Kains, N, Snodgrass, C, Steele, IA, Tsapras, Y, Albrow, MD, Batista, V, Beaulieu, J-P, Bennett, DP, Brillant, S, Caldwell, JAR, Cassan, A, Cole, A, Coutures, C, Dieters, S, Prester, DD, Donatowicz, J, Fouque, P, Hill, K, Marquette, J-B, Menzies, J, Pere, C, Ranc, C, Wambsganss, J, Warren, D, De Almeida, LA, Choi, J-Y, DePoy, DL, Dong, S, Hung, L-W, Hwang, K-H, Jablonski, F, Jung, YK, Kaspi, S, Klein, N, Lee, C-U, Maoz, D, Munoz, JA, Nataf, D, Park, H, Pogge, RW, Polishook, D, Shin, I-G, Shporer, A, Yee, JC, Abe, F, Bhattacharya, A, Bond, IA, Botzler, CS, Freeman, M, Fukui, A, Itow, Y, Koshimoto, N, Ling, CH, Masuda, K, Matsubara, Y, Muraki, Y, Ohnishi, K, Philpott, LC, Rattenbury, N, Saito, T, Sullivan, DJ, Sumi, T, Suzuki, D, Tristram, PJ, Yonehara, A, Bozza, V, Novati, SC, Ciceri, S, Galianni, P, Gu, S-H, Harpsoe, K, Hinse, TC, Jorgensen, UG, Juncher, D, Korhonen, H, Mancini, L, Melchiorre, C, Popovas, A, Postiglione, A, Rabus, M, Rahvar, S, Schmidt, RW, Scarpetta, G, Skottfelt, J, Southworth, J, Stabile, A, Surdej, J, Wang, X-B, Wertz, O, Collaboration, R, Collaboration, PLANET, Collaboration, FUN, Collaboration, MOA, Collaboration, M, The Royal Society, Science & Technology Facilities Council, and University of St Andrews. School of Physics and Astronomy
- Subjects
Nuclear and High Energy Physics ,NDAS ,gravitational lensing: micro ,planetary systems ,techniques: photometric ,FOS: Physical sciences ,Astrophysics ,Gravitational microlensing ,micro [Gravitational lensing] ,Settore FIS/05 - Astronomia e Astrofisica ,False positive paradox ,QB Astronomy ,QC ,QB ,Event (probability theory) ,Physics ,Earth and Planetary Astrophysics (astro-ph.EP) ,High magnification ,photometric [Techniques] ,Astronomy and Astrophysics ,Light curve ,Exoplanet ,Planetary systems ,QC Physics ,13. Climate action ,Space and Planetary Science ,Colors of noise ,Parallax ,Astrophysics - Earth and Planetary Astrophysics - Abstract
For all exoplanet candidates, the reliability of a claimed detection needs to be assessed through a careful study of systematic errors in the data to minimize the false positives rate. We present a method to investigate such systematics in microlensing datasets using the microlensing event OGLE-2013-BLG-0446 as a case study. The event was observed from multiple sites around the world and its high magnification (A_{max} \sim 3000) allowed us to investigate the effects of terrestrial and annual parallax. Real-time modeling of the event while it was still ongoing suggested the presence of an extremely low-mass companion (\sim 3M_\oplus ) to the lensing star, leading to substantial follow-up coverage of the light curve. We test and compare different models for the light curve and conclude that the data do not favour the planetary interpretation when systematic errors are taken into account., Comment: accepted ApJ 2015
- Published
- 2015
- Full Text
- View/download PDF
20. Abortion in the Brazilian constitutional order
- Author
-
Poente, Mariana Lessa de Almeida La, Sarmento, Daniel Antônio de Moraes, Pereira, Jane Reis Gonçalves, and Mendonça, José Vicente Santos de
- Subjects
Liberty ,Constitucional ,Abortion ,Ponderação ,Igualdade ,Constitutional ,CIENCIAS SOCIAIS APLICADAS::DIREITO::DIREITO PUBLICO [CNPQ] ,Privacidade ,Equality ,Aborto ,Privacy ,Liberdade ,Balancing of rigths ,Proteção da vida do feto ,Decriminalization by the judiciary ,Descriminalização pelo Poder Judiciário ,Dignidade ,Dignity - Abstract
Submitted by Boris Flegr (boris@uerj.br) on 2021-01-05T21:20:32Z No. of bitstreams: 1 Mariana Lessa La Poente_Texto Completo.pdf: 1060668 bytes, checksum: 625c0dec3a6a86da5d424db124356a89 (MD5) Made available in DSpace on 2021-01-05T21:20:32Z (GMT). No. of bitstreams: 1 Mariana Lessa La Poente_Texto Completo.pdf: 1060668 bytes, checksum: 625c0dec3a6a86da5d424db124356a89 (MD5) Previous issue date: 2014-08-26 Abortion is a major moral controversies of our time, opposing those who consider it first sight wrong - on the grounds that the fetus is a human person and therefore has the right to life - and those who consider that the principle of human dignity and the human right to liberty and self-determination that derives from dignity isassured only if, at least in early stages of pregnancy, the woman has the freedom of choice about the continuation of a process that occurs inside her body and that affects her future. In Brazil, the interruption of pregnancy - even in its early stages - is, as a rule, criminalized. This criminalization ends up bringing insecurity to women that choose to terminate an unwanted pregnancy, causing them serious health risks and even to their lifes. For this reason and considering the increasing decriminalization of abortion that has been found on the world stage, especially in Western democracies, it is necessary to analyze the constitutionality of the current treatment given to abortion in Brazilian law. Considering the dignity of the human person and from a balance between the opposing principles in controversy, specifically the protection of the life of the fetus and the rights to freedom, equality, privacy and autonomy of women, it is intended to demonstrate the incompatibility of Clause 124 of Criminal Code with the constitutional order established by the 1988 Constitution. This study also intend to demonstrate that the Brazilian political and legal scenario turns out to provide the Judiciary comparative advantages in addressing the issue, making it the most appropriate locus for public debate about abortion in Brazil. O aborto é uma das principais controvérsias morais de nosso tempo, contrapondo aqueles que o consideram errado prima facie por considerarem que o feto é uma pessoa humana e, portanto, detém direito à vida e aqueles que consideram que o princípio da dignidade da pessoa humana e o direito à autodeterminação que dele decorre asseguram à mulher, ao menos nos estágios iniciais da gestação, a liberdade de escolha acerca da continuidade de um processo que se desenvolve em seu corpo e cujos resultados alterarão drasticamente toda a sua vida futuro. No Brasil, a interrupção de gravidez mesmo em seus estágios iniciais é, em regra, criminalizada. Esta criminalização acaba por trazer insegurança às mulheres que, à margem da lei, optam pela interrupção de uma gravidez indesejada, causando-lhes sérios riscos à saúde e mesmo à vida. Por este motivo e considerando a crescente descriminalização do aborto que vem sendo constatada no cenário mundial, notadamente nas democracias ocidentais, faz-se necessária uma análise da constitucionalidade do tratamento atual conferido ao aborto no ordenamento jurídico brasileiro. Tendo como eixo axiológico a dignidade da pessoa humana e a partir de uma ponderação entre os princípios contrapostos na controvérsia, a saber, a proteção da vida do feto e os direitos à liberdade, igualdade, privacidade e autonomia da mulher, pretende-se demonstrar a incompatibilidade do art. 124 com a ordem constitucional instaurada pela Constituição de 1988. Além disso, demonstrar-se-á que o cenário político-jurídico brasileiro acaba por fornecer ao Poder Judiciário de forma contingencial vantagens comparativas no enfrentamento da questão, tornando o locus mais adequado para o debate público acerca do aborto no Brasil.
- Published
- 2014
21. 1T-MoS2: UMA BREVE REVISÃO DAS PROPRIEDADES E APLICAÇÕES DESTE POLIMORFO METÁLICO DO DISSULFETO DE MOLIBDÊNIO
- Author
-
Felipe Moreira Pinto, Felipe de Almeida La Porta, and Fernando Wypych
- Subjects
Chemistry ,QD1-999 - Published
- 2025
- Full Text
- View/download PDF
22. L’identification d’enfants bilingues avec Trouble Spécifique du Langage en France
- Author
-
de Almeida Laetitia, Ferré Sandrine, Morin Eléonore, Prévost Philippe, dos Santos Christophe, Tuller Laurie, and Zebib Rasha
- Subjects
Social Sciences - Abstract
Dans cet article, nous rendons compte de l’utilisation de trois tâches dites LITMUS (Language Impairment Testing in Multilingual Settings) pour distinguer des enfants bilingues avec trouble spécifique du langage oral (TSL) et des enfants bilingues à développement typique (DT) en France, notamment une tâche de répétition de non mots (LITMUS-NWR-French), une tâche de répétition de phrases (LITMUS-SR-French), ainsi qu’un questionnaire parental (LITMUS-PABIQ). Les 82 enfants bilingues évalués, âgés de 5 à 8 ans, étaient exposés au français et soit à l’arabe, au portugais ou au turc. Ils ont été recrutés à travers des établissements scolaires et des cabinets d’orthophonie puis divisés en deux groupes à partir des informations obtenues à travers le questionnaire parental ainsi que de leurs scores à des épreuves langagières standardisés dans leurs deux langues. Nous avons ainsi obtenu un groupe d’enfants bilingues à développement typique (Bi-DT, n = 61) et un groupe d’enfants bilingues avec TSL (Bi-TSL, n = 21). Des enfants monolingues appariés en âge et servant de groupes témoins ont également participé à cette étude : 17 enfants avec TSL et 38 avec DT. Les enfants du groupe Bi-DT ont obtenu des résultats significativement supérieurs à ceux du groupe Bi-TSL à chacune des tâches de répétition. La même tendance a été observée pour les groupes Mo-TD et Mo-TSL. De plus, différents facteurs extra-linguistiques liés au contexte d’apprentissage des enfants bilingues n’ont eu qu’un impact minime sur la performance à ces épreuves.
- Published
- 2016
- Full Text
- View/download PDF
23. Synthesis and characterization of molecularly imprinted magnetic polymer and application in the development of extraction methods for determination of cholesterol in milk
- Author
-
Luciane Effting, César Ricardo Teixeira Tarley ., Felipe de Almeida La Porta, and Alessandra Furtado da Silva
- Abstract
O nível elevado de colesterol no sangue é um grande causador de doenças coronarianas, sendo sua determinação em alimentos de relevância para a saúde humana. Alimentos de origem animal, tais como carnes, ovos e leite apresentam matrizes complexas, o que exige que um método de preparo de amostra seja executado antes da determinação de colesterol. Neste sentido, o uso de polímeros magnéticos molecularmente impressos é uma opção atraente para o preparo de amostra com o emprego da extração em fase sólida magnética, pois permite a retenção seletiva do analito na rede polimérica sobre o núcleo magnético e posterior eluição, executando a separação da fase extratora com o simples uso de um campo magnético. Esse trabalho teve o objetivo de sintetizar, caracterizar e avaliar o desempenho analítico em extração em fase sólida magnética de um polímero magnético molecularmente impresso na extração e quantificação de colesterol e sua aplicação em amostras de leite. Os materiais sintetizados, foram caracterizados por espectroscopia de infravermelho módulo ATR-FTIR, obtendo-se bandas características dos materiais sintetizados, comprovando sua síntese. A análise de fisiossorção mostrou como as etapas de síntese influenciaram nos materiais, destacando-se a área superficial do Fe3O4/SiO2/MIP (óxido de ferro com sílica - polímero molecularmente impresso) de 163,18 m2 g-1. A análise de raio-X e medidas de magnetização mostraram que o núcleo magnético de óxido de ferro permaneceu inalterado, proporcionando ao material bom desempenho magnético. A análise termogravimétrica apontou para a estabilidade do núcleo magnético e da sílica, com maior perda de massa para o Fe3O4/SiO2/MIP, que apresentou maior quantidade de silício, evidenciando a presença da rede polimérica no material. As imagens de microscopia eletrônica de varredura e microscopia eletrônica de transmissão mostraram o óxido de ferro dispersado na matriz de sílica, formando uma estrutura interpenetrante. O estudo do desempenho quanto à extração em fase sólida magnética apontou o clorofórmio como o melhor solvente em 60 segundos de agitação em Vortex, com uma massa de 10,0 mg de Fe3O4/SiO2/MIP, sendo necessários 0,5 mL de etanol para eluir o colesterol em um tempo de 180 segundos e capacidade máxima de sorção de 314,05 mg g-1. Obteve-se o melhor ajuste para o modelo cinético de pseudo-segunda ordem e isoterma de sorção de Langmuir-Freundlich para dois sítios de sorção e a seletividade do Fe3O4/SiO2/MIP frente a interferentes foi satisfatória. O desempenho analítico do método obteve um LQ e LD de 11,5 e 38,5 µg L-1, respectivamente, com um fator de pré-concentração de 7,88 vezes e precisão, intra-dia e inter-dia, de 1,60% e 2,46% para concentração de 5,0 mg L-1, e 1,52% e 2,37% para concentração de 10,0 mg L-1. A aplicação em amostras de leite bovino possibilitou a quantificação do colesterol, com recuperações acima de 90%. High blood cholesterol is a major cause of coronary heart disease and its determination in foods of relevance to human health. Animal foods such as meat, eggs and milk are considered complex matrices, which requires that a sample preparation method be performed prior to cholesterol determination. In this sense, the use of molecularly imprinted magnetic polymers is an attractive option for sample preparation with the use of magnetic solid phase extraction, as it allows selective retention of the analyte in the polymer network over the magnetic core and subsequent elution, performing separation of the extraction phase with the simple use of a magnetic field. Thus, this work aims to synthesize, characterize and evaluate the analytical performance in magnetic solid phase extraction of a magnetic molecularly imprinted polymer in the extraction and quantification of cholesterol and its application in milk samples. The synthesized materials were characterized by ATR-FTIR module infrared spectroscopy, obtaining characteristic bands of the synthesized materials, proving their synthesis. The physiosorption analysis showed how the synthesis steps influenced the materials, highlighting the Fe3O4/SiO2/MIP (silica iron oxid - molecularly imprinted polymer) surface area of 163.18 m2 g-1. X-ray analysis and magnetization measurements showed that the iron oxide magnetic core remained unchanged, providing the material with good magnetic performance. The thermogravimetric analysis pointed to the stability of the magnetic core and silica, with greater mass loss for Fe3O4/SiO2/MIP, which presented a greater amount of silicon, showing the presence of the polymeric network in the material. Scanning electron microscopy and transmission electron microscopy images showed the iron oxide dispersed in the silica matrix, forming an interpenetrating structure. The study of magnetic solid phase extraction performance indicated chloroform as the best solvent in 60 seconds of Vortex, with a mass of 10.0 mg Fe3O4/SiO2/MIP, requiring 0.5 mL of ethanol to elute the solvent cholesterol within 180 seconds and maximum sorption capacity of 314.05 mg g-1. The best fit for the pseudo-second order kinetic model and Langmuir-Freundlich sorption isotherm was obtained for two sorption sites and the Fe3O4/SiO2/MIP selectivity against interferents was satisfactory. The best fit for the pseudo-second order kinetic model and Langmuir-Freundlich sorption isotherm was obtained for two sorption sites and the Fe3O4/SiO2/MIP selectivity against interferents was satisfactory. The analytical performance of the method obtained an LQ 11.5 µg L-1 an LD 38.5 µg L-1, respectively, with a preconcentration factor of 7.88 times and precision, intra- day and interday of 1.60% and 2.46% for a concentration of 5.0 mg L-1, and 1.52% and 2.37% for a concentration of 10.0 mg L-1. The application in bovine milk samples made it possible to quantify cholesterol, with recoveries above 90%.
- Published
- 2020
24. Development of voltammetric method for bisacodyl determination using boron-doped diamond electrode
- Author
-
Max Fabrício Falone Varelo, Elen Julciléia Romão Sartori Braz ., Lúcio César de Almeida, and Felipe de Almeida La Porta
- Abstract
Neste trabalho, foi desenvolvido um procedimento voltamétrico para a determinação de bisacodil em formulações farmacêuticas empregando o eletrodo de diamante dopado com boro. O perfil voltamétrico indicou um pico de oxidação irreversível, reprodutível e bem definido em 1,55 V (vs Ag/AgCl (KCl 3,0 mol L-1)), em solução tampão Britton-Robinson (pH 5,0). O tipo de pré-tratamento do eletrodo, pH e eletrólito suporte foram avaliados no desenvolvimento do método. O estudo de velocidade realizado em voltametria cíclica sugere que o processo é controlado por difusão de espécies na superfície do eletrodo. A partir das condições instrumentais estabelecidas na voltametria de pulso diferencial, o eletrodo apresentou uma resposta linear de corrente versus concentração no intervalo de 1,00 - 44,0 μmol L-1, com limite de detecção de 0,353 μmol L-1. O método proposto foi aplicado na determinação de bisacodil em amostras farmacêuticas comerciais. Os resultados obtidos foram comparados estatisticamente com um método de referência espectrofotométrico, a um nível de 95% de confiança. O procedimento desenvolvido se apresenta como alternativa simples, rápida, ambientalmente favorável, podendo ser amplamente aplicado em diversas análises de rotina. In this work, a voltammetric procedure was developed for the determination of bisacodyl in pharmaceutical formulations employing a boron-doped diamond electrode. The voltammetric profile of bisacodyl indicated a well-defined peak at 1.55 V (vs Ag/AgCl (KCl 3.0 mol L-1) in Britton-Robinson buffer solution (pH 5.0). The type of pre-treatment, pH and supporting electrolyte were evaluated. The scan rate study performed in cyclic voltammetry, suggested that the process is controlled by diffusion. Under optimized instrumental conditions of differential pulse voltammetry, the electrode presented linear response of current versus concentration in the range of 1.00 - 44.00 μmol L-1, with a detection limit of 0.353 μmol L-1. The proposed method was applied in the determination of bisacodyl in commercial pharmaceutical samples. The results obtained were compared with those obtained by a spectrophotometric method which indicates no difference between these methods at a confidence level of 95%. The developed method is simple, fast, environmentally friendly, and suitable for routine analysis.
- Published
- 2018
25. In vitro antibacterial and antibiofilm activity and urinary catheter application of silver nanoparticles against uropathogenic Proteus mirabilis
- Author
-
Gustavo Issamu Asai Saikawa, Sérgio Paulo Dejato da Rocha ., Felipe de Almeida La Porta, and Admilton Gonçalves de Oliveira Junior
- Abstract
Proteus mirabilis é um dos principais agentes causadores de infecções urinárias associadas à catéter. Os tratamentos contra infecções bacterianas têm se tornado cada vez mais ineficazes devido à rápida emergência de bactérias resistentes a antimicrobianos, levado à necessidade crítica de novos agentes antimicrobianos. Nanopartículas de prata (AgNPs) aparecem como candidatas por conta de sua atividade antimicrobiana e baixa toxicidade aos humanos. Este trabalho teve como objetivo verificar a atividade de AgNPs biossintetizadas pelo fungo Fusarium oxysporum contra isolado clínico de P. mirabilis uropatogênico e verificar a atividade antimicrobiana de catéteres de Foley revestidos com essas AgNPs. As AgNPs foram sintetizadas pela adição de AgNO3 ao filtrado fúngico. Análise de tamanho, potencial Zeta e morfologia das AgNPs foram determinados por espalhamento de luz dinâmico, laser doppler eletroforese, e microscopia eletrônica de transmissão, respectivamente. Os ensaios de microdiluição em caldo e cinética de tempo de morte foram usados para determinar a atividade antibacteriana das AgNPs. O ensaio de redução do XTT foi utilizado para determinação da atividade antibiofilme. Além disso, fragmentos de catéter foram revestidos com duas e três camadas de AgNPs usando polidopamina como agente ancorante. A caracterização da superfície foi realizada EDX. Pedaços de catéter revestido foram incubados em urina inoculada com P. mirabilis e o tempo necessário para incrustação foi determinado. Imagens de MCE foram realizadas para comparar a formação de biofilme entre os catéteres pristino e revestidos. As AgNPs apresentaram formato esférico, com tamanho médio de 126,3 nm e potencial Zeta de -36,86 mV. A CIM foi 62,5 µM, causando inviabilidade celular total após 4 horas de ação. A formação de biofilme foi inibida em 76,4% e o biofilme maduro foi reduzido em 1,9%. A análise por EDX confirmou a presença de prata. A incrustação dos catéteres de 2 e 3 camadas aconteceu após 13 e 20 dias, respectivamente, enquanto o catéter pristino apresentou incrustação no primeiro dia. MCE mostrou que o revestimento do catéter reduziu a intensidade de fluorescência em mais de 98%. Dessa forma, conclui-se que AgNPs biossintetizadas por F. oxysporum possuem grande atividade antibacteriana e antibiofilme, sendo uma potencial alternativa ao tratamento com antibióticos em infecções por P. mirabilis uropatogênico. Proteus mirabilis is one of the main causative agent of catheter associated urinary tract infection. Treatment of bacterial infections are becoming increasingly inefficient due to the rapid emergence of resistant bacteria, leading to a critical need for new antimicrobial agents. Silver nanoparticles (AgNPs) are promising candidates by it antibacterial activity and low toxicity for humans. This work intended to assess the activity of AgNPs biosynthesized by Fusarium oxysporum against a clinical isolate of uropathogenic P. mirabilis and assess the antimicrobial activity of Foley catheter coated with those AgNPs. AgNPs were synthesized by adding AgNO3 to fungal filtrate. AgNPs analisys of size, Zeta potential and morpholgy were determined by dynamic light scattering, laser doppler electrophoresis and transmition electromicroscopy, respectively. Broth microdilution and time-kill kinetics assays were used to determine the antibacterial activity of the AgNPs. The XTT reduction assay was employed to determine the antibiofilm effect. Beyond that, fragments of catheter were coated with two and three AgNPs layers using polydopamine as the surface anchor. Thickness and homogeneity were confirmed by EDX and SEM. Pieces of coated catheter were incubated in urine inoculated with P. mirabilis and the time taken for encrustation to occur was recorded. SCM images were taken to compare biofilm formation between pristine and coated catheters. AgNPs showed spherical shape, an average size of 126,3 nm e Zeta potential of -36,86 mV. MIC was found to be 62,5 µM, causing total loss of viability after 4 hours of action. Biofilm formation was 76,4% lower and mature biofilm was reduced by 1,9%. EDX analisys confirmed presence and homogeneity of AgNPs on coating. Encrustation of the two and three AgNPs layers catheters occurred after 13 and 20 days, respectively, while pristine catheter was encrusted on the first day. SCM showed that the coating on catheter was able to reduce the flourescence intensity by more than 98%. Therefore, it can be concluded that the AgNPs biosynthesized by F. oxysporum has great antibacterial and antibiofilim activity, being considered as a potential alternative to antibiotic treatment of infections caused by uropathogenic P. mirabilis.
- Published
- 2018
26. Amoxicillin-induced bacterial gut dysbiosis decreases IL-1β and IL-6 expression but exacerbate lung inflammatory response against Mycobacterium bovis-Bacille Calmette-Guérin (BCG).
- Author
-
Miyauchi-Tavares TM, Silva EN, Dos Santos JA, Sousa PV, Braga MFT, Carminatti CM, Lanza VB, Fagundes BC, Novaes RD, de Almeida LA, and Corsetti PP
- Subjects
- Animals, Mice, Lung microbiology, Lung immunology, Lung drug effects, Lung pathology, Anti-Bacterial Agents pharmacology, Anti-Bacterial Agents adverse effects, Dysbiosis chemically induced, Dysbiosis microbiology, Gastrointestinal Microbiome drug effects, Mycobacterium bovis immunology, Amoxicillin pharmacology, Interleukin-1beta metabolism, Interleukin-1beta genetics, Interleukin-6 metabolism, Mice, Inbred C57BL
- Abstract
Tuberculosis is one of the leading causes of global mortality, and the standard, prolonged, and intensive treatment can affect intestinal homeostasis. This study investigated amoxicillin-induced bacterial gut dysbiosis and its impact on the immune response of C57BL/6 mice to pulmonary infection by Mycobacterium bovis-BCG. It was observed that amoxicillin treatment resulted in bacterial gut dysbiosis, characterized by an increase in the phylum Proteobacteria and a reduction in Bacteroidetes and Firmicutes. This alteration was associated with a decrease in the animals' body weight and a reduction in the expression of pro-inflammatory cytokines such as IL-1β and IL-6, suggesting a compromised immune response. Additionally, microstructural analysis revealed significant alterations in the caecum and pulmonary structure of the mice, indicating tissue damage associated with intestinal dysbiosis. The results indicate that amoxicillin-induced bacterial gut dysbiosis may negatively affect pulmonary immunity and exacerbate M. bovis-BCG infection, highlighting the need to consider the impacts of intestinal microbiota on the development and control of tuberculosis. This study contributes to the understanding of the interaction between intestinal microbiota, antibiotic treatment, and immunity in pulmonary infections., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2025 Miyauchi-Tavares et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
- Published
- 2025
- Full Text
- View/download PDF
27. Sequential macrophage DENV and ZIKV infection shows differential expression of CD86, IFN-β, and regulation of TNF-α and IL-1β depending on DENV serotype.
- Author
-
Brancaglion GA, de Souza GAP, de Araújo LP, Silva EN, da Silva LL, de Lima Tana F, Corsetti PP, Coelho LFL, and de Almeida LA
- Abstract
Dengue virus (DENV) is an RNA virus belonging to the Flaviviridae family, comprising four antigenically distinct serotypes. Dengue is the primary arthropod-transmitted virus globally, posing a significant public health challenge, especially in Brazil, where the largest outbreak of Zika virus (ZIKV) was also recorded in 2016. ZIKV shares genomic and structural similarities with DENV, and their co-circulation in Brazil provides evidence of co-infection. The innate immune response against DENV and ZIKV is mediated by pattern recognition receptors that initiate intracellular signaling, leading to antiviral or inflammatory responses. This study aims to better understand the innate immune response to ZIKV in macrophages previously infected with DENV. To achieve this, bone marrow cells from C57BL/6 mice were differentiated into macrophages (BMDMs) and independently infected with each of the four DENV serotypes for 12 h, followed by ZIKV infection for an additional 12 h. Twenty-four hours post-infection, macrophage activation markers CD86 were assessed using flow cytometry and fluorescence microscopy. Pro-inflammatory and antiviral gene expressions were evaluated by qPCR. IFN-β was found to be down-regulated in all analyzed groups. No differences in CD86 expression were observed in ZIKV-infected BMDMs previously infected with DENV, except for serotype 4, which showed an increase in both activation markers. Conversely, TNF-α and IL-1β were down-regulated compared to non-infected or only DENV4-infected cells, correlating with increased cell viability and decreased production of the cytokine TNF-α. Bioinformatic analysis suggested that the expression of both cytokines might be regulated by miRNAs, including miR-181a-5p, which is also up-regulated in the innate immune response. Taken together, the results indicated that co-infection with DENV serotype 4 and ZIKV in mice BMDMs increases the expression of CD86, promoting macrophage activation, but reduces the expression of pro-inflammatory genes TNF-α and IL-1β, indicating enhanced cell viability what can be modulated by miRNAs., Competing Interests: Declarations. Competing interests: The authors declare that they have no conflicts of interests., (© 2025. The Author(s) under exclusive licence to Sociedade Brasileira de Microbiologia.)
- Published
- 2025
- Full Text
- View/download PDF
28. Effect of Early Postoperative Mobilization on Functional Recovery, Hospital Length of Stay, and Postoperative Complications After Immediate Internal Pudendal Artery Perforator Flap Reconstruction for Irradiated Abdominoperineal Resection Defects: A Prospective, Randomized Controlled Trial.
- Author
-
Lima de Araujo CA, de Freitas Busnardo F, Thome Grillo VA, Chirnev Felício CH, Antônia de Almeida LA, Sparapan Marques CF, Nahas CS, Imperialle AR, de Castro Cotti GC, Gemperli R, and Ribeiro U Jr
- Subjects
- Humans, Male, Female, Prospective Studies, Middle Aged, Recovery of Function, Follow-Up Studies, Quality of Life, Perineum surgery, Aged, Prognosis, Proctectomy adverse effects, Rectal Neoplasms surgery, Postoperative Complications etiology, Perforator Flap, Plastic Surgery Procedures methods, Length of Stay, Early Ambulation
- Abstract
Background: Patients undergoing perineal defect reconstruction with the internal pudendal artery perforator (IPAP) flap traditionally face 5 days of postoperative bed rest (BR) to minimize surgical risks. However, prolonged BR can exacerbate postoperative physiologic changes such as increased fatigue, reduced body mass, and declining lung function, while also leading to complications such as pneumonia, delirium, deep vein thrombosis, and pressure injuries. This study assessed the effectiveness, feasibility, and safety of an adapted early mobilization (EM) program for these patients., Methods: This prospective, randomized, controlled clinical study involved 51 patients assigned to adapted EM (n = 25) or BR (n = 26). Whereas EM included core exercises, orthostasis training, gait training, muscle strengthening, and aerobic exercises after surgery, BR followed standard bed rest protocols. The primary outcome was independent ambulation for 3 m on postoperative day 5. The secondary outcomes included 6-min walk test (6MWT) distances on days 5 and 30, hospital length of stay, healing time, postoperative complications, fatigue prevalence, and quality of life., Results: On day 5, EM improved ambulation significantly compared with BR (68.0% vs 38.5%; P = 0.035) and achieved greater 6MWT distances on days 5 (108.78 vs 47.73 m; P = 0.041) and 30 (243.8 vs 166.29 m; P = 0.018). The EM patients were discharged earlier (66.7% by day 10 vs 33.3% of the BR patients; P = 0.043), with comparable healing times (P = 0.06) and postoperative complication rates (68% vs 80.8%; P = 0.296). Fatigue prevalence and quality of life did not differ significantly between the two groups., Conclusion: Early mobilization after IPAP flap reconstruction is safe and feasible, promoting early ambulation and recovery and facilitating earlier discharge without increasing complications., Competing Interests: Disclosures: There are no conflicts of interest., (© 2024. Society of Surgical Oncology.)
- Published
- 2025
- Full Text
- View/download PDF
29. Correction: Effect of Early Postoperative Mobilization on Functional Recovery, Hospital Length of Stay, and Postoperative Complications After Immediate Internal Pudendal Artery Perforator Flap Reconstruction for Irradiated Abdominoperineal Resection Defects: A Prospective, Randomized Controlled Trial.
- Author
-
Lima de Araujo CA, de Freitas Busnardo F, Thome Grillo VA, Chirnev Felício CH, Antônia de Almeida LA, Sparapan Marques CF, Nahas CS, Imperialle AR, Cutait de Castro Cotti G, Gemperli R, and Ribeiro U Jr
- Published
- 2025
- Full Text
- View/download PDF
30. Engineering Protein Dynamics through Mutational Energy Landscape Traps.
- Author
-
Machado LA, Sartori J, Franklin PFDC, Costa MGS, and Guimarães ACR
- Subjects
- Thermodynamics, Animals, Mutagenesis, Molecular Dynamics Simulation, Protein Engineering, Muramidase chemistry, Muramidase metabolism, Muramidase genetics, Mutation, Protein Conformation
- Abstract
Protein dynamics is essential for various biological processes, influencing functions such as enzyme activity, molecular recognition, and signal transduction. However, traditional protein engineering methods often focus on static structures, lacking tools to precisely manipulate dynamic behaviors. Here, we developed Mutational Energy Landscape Trap (MELT), a novel method designed to control protein dynamics by combining Normal Mode Analysis (NMA) and in silico mutagenesis. MELT works by displacing protein structures along low-frequency normal modes and introducing mutations to either lock proteins in these conformations or increase dynamics along the chosen normal modes. We tested MELT using hen-egg lysozyme as a model system. The method was validated by monitoring relevant collective coordinates during molecular dynamics simulations and evaluation of the collective movements of each construct. Our experiments showed that MELT was able to consistently create new protein sequences with the desired dynamical behavior in simulations. It demonstrates its potential for applications in the field of protein engineering, being an unprecedented way of manipulating protein features.
- Published
- 2025
- Full Text
- View/download PDF
31. Systemic photobiomodulation: an integrative review of evidence for intravascular laser irradiation of blood and vascular photobiomodulation.
- Author
-
Brassolatti P, Parizotto NA, Guirro ECO, de Almeida LA, Tim CR, Nishioka MA, de Souza JR, and de Andrade ALM
- Subjects
- Humans, Animals, Low-Level Light Therapy methods
- Abstract
Currently, clinical practice has demonstrated various applications for systemic laser photobiomodulation (PBM). In recent years, an increasing number of studies have been highlighted in the literature; however, they differ in their application methods, which can be intravenous, referred to as ILIB (intravascular laser irradiation of blood), or transdermally, recently termed VPBM (vascular photobiomodulation). This review aimed to compile all findings on these techniques and critically discuss their results. A search for articles was conducted in the PubMed, Scopus, and Web of Science databases using Medical Subject Headings (MeSH) to select descriptors with the boolean operators "AND/OR." After applying inclusion and exclusion criteria, 37 articles were selected. Of these, 19 studies discussed the use of systemic PBM with intravenous application, and 7 studies reported transcutaneous application. Regarding clinical studies, 28 studies addressed the application of the techniques in respiratory, cardiovascular, metabolic, neurological, and musculoskeletal conditions. For preclinical studies, 9 articles primarily discussed the application of systemic PBM in pulmonary and musculoskeletal conditions. Despite the promising results, methodological limitations, and variabilities in studies on systemic laser PBM prevent the categorical assertion of its efficacy. It is essential to conduct rigorous new studies to elucidate the mechanisms of action and determine the technique's efficacy., Competing Interests: Declarations. Competing interests: The authors declare no competing interests., (© 2024. The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature.)
- Published
- 2025
- Full Text
- View/download PDF
32. G protein-coupled purinergic P2Y receptors in infectious diseases.
- Author
-
Carvalho LA, Alves VS, Coutinho-Silva R, and Savio LEB
- Abstract
The purinergic P2Y receptors comprise eight G-coupled receptor (GPCR) subtypes already identified (P2Y
1 , P2Y2 , P2Y4 , P2Y6 , P2Y11 , P2Y12 - 14 ). P2Y receptor physiological agonists are extracellular purine and pyrimidine nucleotides such as ATP (Adenosine triphosphate), ADP (Adenosine diphosphate), UTP (Uridine triphosphate), UDP (Uridine diphosphate), and UDP-glucose. These receptors are expressed in almost all cells. P2Y receptors are found in immune cells, such as macrophages, neutrophils, mast cells, dendritic cells, and lymphocytes. P2Y receptors play essential roles in inflammation and are involved in several cell processes, including efferocytosis, phagocytosis, chemotaxis, degranulation, killing pathogens, cytokine production, and platelet aggregation. These processes underpin immune responses against pathogens. Therefore, here we discuss P2Y receptor pharmacology and mechanisms triggered by the activation of these receptors in virus, bacteria, and parasite infections. In addition, we highlight the therapeutical potential of P2Y receptors for developing new pharmacological strategies to modulate inflammation and disease outcomes in pathogen infections., Competing Interests: Declaration of competing interest The authors declare no competing or financial interests., (Copyright © 2025 Elsevier Inc. All rights reserved.)- Published
- 2025
- Full Text
- View/download PDF
33. Heart Rate Reduction after Effort Test Is Higher in Physically Active Adults without Familial Cardiovascular Risk Factor.
- Author
-
Dourado LA, Dourado PMM, Oliveira JG, Silva EMD, Dourado JPA, and Braga PGS
- Subjects
- Humans, Male, Female, Adult, Middle Aged, Young Adult, Adolescent, Time Factors, Analysis of Variance, Statistics, Nonparametric, Risk Factors, Reference Values, Heart Rate physiology, Exercise Test methods, Heart Disease Risk Factors, Exercise physiology, Cardiovascular Diseases genetics, Cardiovascular Diseases physiopathology
- Abstract
The objective of this study is to investigate the influence of physical activity on heart rate (HR) recovery, after treadmill exercise testing, in asymptomatic adults, with and without familial risk factors (FR) for cardiovascular disease. Two hundred and fifty (250) adults of both sexes aged 18 to 59 years were included in the study. None of the participants had a history of cardiovascular disease or used medications for chronic diseases. All individuals underwent exercise testing using the Ellestad protocol. Delta values were calculated by subtracting peak HR from HR in the first, second, fourth, and sixth minutes of recovery. The family history of cardiovascular disease and physical activity were documented. For statistical analysis, ANOVA was performed, followed by Bonferroni or Kruskall-Wallis multiple comparisons, followed by Dunn's multiple comparisons. The delta values at the first, second, fourth, and sixth minutes of recovery were lower in individuals who did not engage in physical activity and had no family cardiovascular risk factor, compared to those who were physically active and had no family risk factor. No differences in delta values were observed between physically active individuals with cardiovascular risk factors and physically inactive individuals with a family history at the time points studied. In individuals without a family risk factor, physical activity appears to enhance autonomic control, increasing the capacity to reduce HR after exercise. However, this effect was not evident in those with a family risk factor, as physical activity did not impact recovery HR.
- Published
- 2025
- Full Text
- View/download PDF
34. Nutritional Profiling of Wild Edible Plants: Quantification of Macronutrients and Minerals via Energy Dispersive X-ray (EDX) Fluorescence Spectroscopy.
- Author
-
Ibrahim M, Akhtar N, Khan A, Sara, Anwar Y, Wong LS, Subramaniyan V, Kumarasamy V, Rauf A, Ahlawat YK, Sharma N, and Lopes LA
- Subjects
- Pakistan, Humans, Plants, Edible chemistry, Minerals analysis, Spectrometry, X-Ray Emission, Nutrients analysis, Nutritive Value
- Abstract
The wild edible plants offer a valuable resource for food and human nutrition. The current study aimed to analyze the proximate composition and ethno-medicinal profiles of twenty selected wild edible plants from the Malakand District, Pakistan. The proximate composition (moisture, ash, crude protein, crude fat, and dietary fiber) was analyzed following Association of Official Agricultural Chemists (AOAC) protocols. Ethno-medicinal profiles were obtained through semi-structured interviews with local informants. Mineral elements were analyzed using Energy Dispersive X-ray Fluorescence (EDX) Spectroscopy. The normalized variation matrix and centered log ratio (CLR) biplot were used to assess linear associations between nutritional components. The results revealed significant variations in the nutritional components and mineral contents among the studied plant species. Higher crude carbohydrates (64.48%) were scrutinized in Ziziphus jujuba, followed by proteins (19.90%) in leaves of Solanum nigrum, fiber (19.50%) in Caralluma tuberculata and fats (6.12%) in Mentha spicata. A maximum energy value of 332.34 Kcal/100g was calculated for leaves of Solanum nigrum. The concentrations of carbon (C) in Mentha longifolia were (60.20%), followed by oxygen (46.06%) in Ziziphus jujuba, potassium (10.80%) in Rumex dentatusand nitrogen (7.98%) in Nasturtium officinale. The centered log ratio biplot confirms strong relationships between moisture, energy, carbohydrates, fibers, and ash content, while protein and fat concentrations exhibit a separate pattern. The findings provide valuable insights into the compositional data analysis of edible plant species, suggesting interdependencies among carbohydrate, energy, moisture content, and fibers. Additionally, the results of our current study showed that all of these selected wild edible plants have the potential to provide humans with important macronutrients and elements.
- Published
- 2024
- Full Text
- View/download PDF
35. Larvicidal and Oviposition Activity of Commercial Essential Oils of Abies sibirica Ledeb., Pogostemon cablin (Blanco) Benth., Juniperus communis L. and Their Combinations Against Aedes aegypti .
- Author
-
de Aguiar JCROF, da Silva AC, Santos EF, Vieira GJDSG, Araújo LA, de Andrade JJA, Anselmo WM, da Rocha SKL, Dos Santos FHG, Arruda CCL, Albuquerque CFO, Claudino LLM, da Silva PS, Silva DGR, Aguiar JVC, de Veras BO, and Navarro DMDAF
- Subjects
- Animals, Abies chemistry, Plant Extracts pharmacology, Plant Extracts chemistry, Plant Oils pharmacology, Plant Oils chemistry, Oils, Volatile pharmacology, Oils, Volatile chemistry, Aedes drug effects, Juniperus chemistry, Insecticides pharmacology, Insecticides chemistry, Pogostemon chemistry, Larva drug effects, Oviposition drug effects
- Abstract
Aedes aegypti is a vector responsible for the transmission of various arboviruses and is considered by the World Health Organization to be one of the main public health problems in the world. This study evaluated the larvicidal and oviposition activity of essential oils from Abies sibirica , Pogostemon cablin and Juniperus communis and their formulations. Chromatographic analysis by GCMS identified a total of 28, 52 and 18 compounds for the oils of the species A. sibirica , J. communis and P. cablin , respectively. The larvicidal bioassays showed an LC
50 of 67.53 ppm, 92.45 ppm and 35.95 ppm, respectively, for A. sibirica (A), J. communis (J) and P. cablin (P) as well as their binary (J + P, 39.50 ppm; A + P, 51.64 ppm) and ternary (A + J + P, 66.99 ppm) formulations. These oils and formulations also showed deterrent activity at the larvicidal concentrations tested ( A. sibirica : OAI: -0.41; J. communis : OAI: -0.31; P. cablin : OAI: -0.62; A + J + P: -0.30; A + P: -0.68; A + J: -0.29; and J + P: -0.30). The oils and their formulations are a potential larvicidal source for mitigating the proliferation of diseases by this vector.- Published
- 2024
- Full Text
- View/download PDF
36. Evaluation of blood cell count using an automatic hematology analyzer to optimize collection of peripheral blood progenitor cells by leukapheresis.
- Author
-
Pederzoli PRMP, Prata KL, Cruz NG, Marzano PVA, Martins MC, Costa LA, de Andrade RK, Libânio MRIS, Custer B, and Belisário AR
- Abstract
Background: Autologous stem cell transplantation is a treatment modality for several diseases. Prediction of successful mobilization may be useful to optimize hematopoietic stem cell collection., Study Design and Methods: This was a retrospective study with data from transplantation candidates between September 2015 and December 2021 being analyzed. The medical record of each patient was reviewed to mine mobilization information. The laboratory data analyzed were CD34
+ cell enumeration and pre-collection peripheral blood cell count. The primary outcome, good mobilization, was defined as a CD34+ cell count ≥20/μL., Results: This study included 807 patients. Increased patient weight, low mean corpuscular volume, high nucleated red blood cells, peripheral blood mononuclear cell and immature granulocyte counts were significantly associated with good mobilization. In addition, patients diagnosed with multiple myeloma were two times more likely to be good mobilizers than patients with lymphoma. The model was applied to a validation set to identify patients who underwent apheresis (CD34+ cell count ≥10 µL), resulting in a sensitivity of 69 %, a specificity of 95 %, positive predictive value of 98 %, and a negative predictive value of 50 %., Conclusion: Success in mobilization was greater in patients who underwent the first mobilization cycle and who had a diagnosis of multiple myeloma. Furthermore, higher body weight, and nucleated red blood cells, immature granulocytes and mononuclear cell counts, as well as low mean corpuscular volumes, were associated with successful mobilization., Competing Interests: Conflicts of interest The authors have no conflict of interest to declare, (Copyright © 2024 Associação Brasileira de Hematologia, Hemoterapia e Terapia Celular. Published by Elsevier España, S.L.U. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
37. Analysis of anticipatory and compensatory postural adjustment in women of different age groups using surface electromyography.
- Author
-
Moura LA, Scardovelli TA, Fernandes da Silva AR, da Palma Valério M, Barreto Campos H, de Camargo MLA, Moraes IT, Martini SC, da Silva Boschi SRM, de Oliveira Gonzalez T, and Pereira da Silva A
- Subjects
- Humans, Female, Adult, Aged, Young Adult, Posture, Aging physiology, Middle Aged, Movement, Age Factors, Lower Extremity physiology, Electromyography methods, Postural Balance physiology, Muscle, Skeletal physiology
- Abstract
Postural balance is crucial for daily activities, relying on the coordination of sensory systems. Balance impairment, common in the elderly, is a leading cause of mortality in this population. To analyze balance, methods like postural adjustment analysis using electromyography (EMG) have been developed. With age, women tend to experience reduced mobility and greater muscle loss compared to men. However, few studies have focused on postural adjustments in women of different ages using EMG of the lower limbs during laterolateral and anteroposterior movements. This gap could reveal a decrease in muscle activation time with aging, as activation time is vital for postural adjustments. This study aimed to analyze muscle activation times in women of different ages during postural adjustments. Thirty women were divided into two groups: young and older women. A controlled biaxial force platform was used for static and dynamic balance tests while recording lower limb muscle activity using EMG. Data analysis focused on identifying muscle activation points and analyzing postural adjustment times. Results showed significant differences in muscle activation times between the two groups across various muscles and platform tilt conditions. Younger women had longer muscle activation times than older women, particularly during laterolateral platform inclinations. In anteroposterior movements, older women exhibited longer activation times compared to their laterolateral performance, with fewer differences between the groups. Overall, older women had shorter muscle activation times than younger women, suggesting a potential indicator of imbalance and increased fall risk., (© 2024 IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.)
- Published
- 2024
- Full Text
- View/download PDF
38. Association between the G/G genotype of the lncRNA MEG3 rs7158663 polymorphism and proliferative diabetic retinopathy.
- Author
-
Brondani LA, Dandolini I, Girardi E, Canani LH, Crispim D, and Dieter C
- Subjects
- Humans, Female, Male, Middle Aged, Case-Control Studies, Aged, Gene Frequency genetics, Alleles, Diabetic Retinopathy genetics, RNA, Long Noncoding genetics, Diabetes Mellitus, Type 2 genetics, Polymorphism, Single Nucleotide genetics, Genetic Predisposition to Disease genetics, Genotype
- Abstract
Objective: To investigate the association between the long noncoding RNAs (lncRNAs) maternally expressed gene 3 ( MEG3 ) rs7158663 polymorphism and diabetic retinopathy (DR) in patients with type 2 diabetes mellitus (T2DM)., Subjects and Methods: The study included 628 patients with T2DM and DR ("case group," including 283 with proliferative DR [PDR] and 345 with nonproliferative DR [NPDR]), and 381 patients with T2DM but no DR ("control group"). The diagnosis of DR was established using indirect ophthalmoscopy. The rs7158663 A/G polymorphism was genotyped using real-time polymerase chain reaction (PCR) with TaqMan probes., Results: Patients with DR, compared with those without DR, had lower frequencies of both the G/G genotype (17.5% and 23.6%, respectively, p = 0.044) and the G allele (p = 0.017). When only patients with PDR were compared with controls, the G/G genotype was associated with increased protection against PDR after adjustment (odds ratio 0.551, 95% confidence interval 0.314-0.966, p = 0.038). This association also remained in the dominant (p = 0.036) and additive (p = 0.031) genetic models., Conclusion: This study reveals, for the first time, that the G/G genotype of the lncRNA MEG3 rs7158663 single-nucleotide polymorphism is associated with a protective effect against advanced-stage DR in patients with T2DM. Additional studies are warranted to validate this finding., Competing Interests: Disclosure: no potential conflict of interest relevant to this article was reported.
- Published
- 2024
- Full Text
- View/download PDF
39. Indicators of emotional distress and mindfulness in undergraduate students: a cross-sectional study.
- Author
-
Leite VF, Kogien M, Maia MCW, Bittencourt MN, Rézio LA, and Marcon SR
- Subjects
- Humans, Cross-Sectional Studies, Female, Male, Brazil, Universities organization & administration, Universities statistics & numerical data, Surveys and Questionnaires, Young Adult, Stress, Psychological psychology, Stress, Psychological etiology, Adult, Adolescent, Mindfulness methods, Students psychology, Students statistics & numerical data, Psychological Distress
- Abstract
Objectives: to assess the association between indicators of emotional distress and dispositional mindfulness in health students at a Brazilian federal public university., Methods: a cross-sectional study, developed with university students in the health area of a public institution from May to June 2022. In the analysis, multiple linear regression was used using SPSS software., Results: the sample was mostly female, ≤ 22 years old, non-white, studying the first semesters, with a higher prevalence for the medicine course. Students presented moderate dispositional mindfulness scores. It was observed that the variables of stress, depression and current suicide risk were associated with the capacity for mindfulness., Conclusions: knowing the indicators of emotional distress that are related to the potential of mindfulness can contribute as a situational diagnosis to better design strategies that promote the improvement of emotional indicators of health students.
- Published
- 2024
- Full Text
- View/download PDF
40. Invasive candidiasis in a pediatric tertiary hospital: Epidemiology, antifungal susceptibility, and mortality rates.
- Author
-
Rodrigues LS, Siqueira AC, Vasconcelos TM, Ferreira AMM, Spalanzani RN, Krul D, Medeiros É, Sestren B, Lanzoni LA, Ricieri MC, Motta FA, Estivalet TI, and Dalla-Costa LM
- Subjects
- Humans, Infant, Male, Female, Brazil epidemiology, Child, Preschool, Child, Hospitals, Pediatric statistics & numerical data, Biofilms growth & development, Biofilms drug effects, Incidence, Drug Resistance, Fungal, Adolescent, Infant, Newborn, Risk Factors, Retrospective Studies, Tertiary Care Centers statistics & numerical data, Antifungal Agents pharmacology, Antifungal Agents therapeutic use, Candidiasis, Invasive microbiology, Candidiasis, Invasive mortality, Candidiasis, Invasive epidemiology, Candida drug effects, Candida isolation & purification, Candida classification, Microbial Sensitivity Tests
- Abstract
Invasive infections caused by non-albicans Candida are increasing worldwide. However, there is still a lack of information on invasive candidiasis (IC) in the pediatric setting, including susceptibility profiles and clonal studies. We investigated the clinical, epidemiologic, and laboratory characteristics of IC, possible changes in antifungal susceptibility profiles over time, and the occurrence of clonality in our tertiary children's hospital. We analyzed 123 non-duplicate Candida isolates from sterile sites of pediatric patients in a tertiary hospital in southern Brazil, between 2016 and 2021. Data on demographics, comorbidities, and clinical outcomes were collected. Candida species distribution, antifungal susceptibility profiles, biofilm production, and molecular epidemiology of isolates were assessed using reference methods. The range of IC incidence was 0.88-1.55 cases/1000 hospitalized patients/year, and the IC-related mortality rate was 20.3%. Of the total IC cases, 42.3% were in patients aged < 13 months. Mechanical ventilation, parenteral nutrition, and intensive care unit (ICU) admission were common in this group. In addition, ICU admission was identified as a risk factor for IC-related mortality. The main site of Candida spp. isolation was blood, and non-albicans Candida species were predominant (70.8%). No significant clonal spread was observed among isolates of the three most commonly isolated species, and 99.1% of all isolates were biofilm producers. Non-albicans Candida species were predominant in this study. Notably, clonal expansion and emergence of antifungal drug resistance were not observed in our pediatric setting., (© The Author(s) 2024. Published by Oxford University Press on behalf of The International Society for Human and Animal Mycology.)
- Published
- 2024
- Full Text
- View/download PDF
41. Digested galactoglucomannan mitigates oxidative stress in human cells, restores gut bacterial diversity, and provides chemopreventive protection against colon cancer in rats.
- Author
-
Dos Santos Lima A, de Oliveira Pedreira FR, Bento NA, Novaes RD, Dos Santos EG, de Almeida Lima GD, de Almeida LA, Belo TCA, Vieira FV, Mohammadi N, Kilpeläinen P, Giusti-Paiva A, Granato D, and Azevedo L
- Subjects
- Humans, Animals, Rats, Male, Cell Line, Tumor, Colonic Neoplasms prevention & control, Colonic Neoplasms metabolism, Colonic Neoplasms pathology, Oxidative Stress drug effects, Gastrointestinal Microbiome drug effects, Antioxidants pharmacology, Mannans pharmacology, Mannans chemistry
- Abstract
Galactoglucomannan (GGM) is the predominant hemicellulose in coniferous trees, such as Norway spruce, and has been used as a multipurpose emulsifier in the food industry. In vitro digestion with a cellular antioxidant activity assay was performed to determine the bioaccessibility and antioxidant activity of phenolic compounds, and the behaviour of GGM on in vivo experimental assay against induced colon cancer. The results showed that digestion decreased the bioaccessibility and antioxidant capacity of phenolic compounds. Cellular analysis did not support these findings once an antioxidant effect was observed in human cell lines. GGM attenuated the initiation and progression of colon cancer, by reducing the foci of aberrant crypts in rats, and modified the intestinal bacterial microbiota (disrupting the balance between Firmicutes and Bacteroidetes phyla). Thus, GGM provided chemopreventive protection against the development of colon cancer and acted as an intracellular antioxidant agent., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Luciana Azevedo reports financial support was provided by Minas Gerais State Foundation of Support to the Research. Luciana Azevedo reports financial support was provided by National Council for Scientific and Technological Development., (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
42. Assessing Misophonia in Young Adults: The Prevalence and Psychometric Validation of the MisoQuest Questionnaire.
- Author
-
Silva LA, Noll M, Siqueira GC, and Barbosa AKN
- Abstract
Background/Objectives: Misophonia, characterized by strong emotional reactions to specific sounds, poses significant challenges, particularly in academic settings. This study aimed to examine the psychometric properties of the Brazilian version of the MisoQuest in a sample of high school and university students. The primary objective was to assess its reliability and structural validity to enhance understanding of misophonia in young adults. Methods: A total of 549 students (Mean age = 23.2 years, SD = 9.3; 285 females, 260 males, 4 individuals who did not disclose their gender) participated. Both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were employed to evaluate the MisoQuest. Fit indices for unifactorial and trifactorial models were compared. Internal consistency was assessed using Cronbach's alpha. Results: The EFA suggested a dominant single-factor structure with high factor loadings (ranging from 0.60 to 0.79). However, the CFA revealed excellent fit for both unifactorial (CFI and TLI = 1.00, RMSEA close to zero) and trifactorial models (CFI and TLI = 1.00, RMSEA = 0.037). The MisoQuest demonstrated high internal consistency (Cronbach's alpha = 0.93). Additionally, 4.5% of participants were identified as positive for misophonia based on a predefined cutoff score of 61. Conclusions: The Brazilian version of the MisoQuest is a reliable and valid tool for assessing misophonia. These findings suggest that the instrument may capture multiple dimensions of the disorder. Given the observed prevalence of misophonia and its impact on students, early identification and tailored interventions are crucial for providing adequate support. Further research is needed to refine the tool and expand its clinical utility.
- Published
- 2024
- Full Text
- View/download PDF
43. Influence of the processing on composition, protein structure and techno-functional properties of mealworm protein concentrates produced by isoelectric precipitation and ultrafiltration/diafiltration.
- Author
-
Pinel G, Berthelot U, Queiroz LS, Santiago LA, Silva NFN, Petersen HO, Sloth JJ, Altay I, Marie R, Feyissa AH, Casanova F, and Doyen A
- Subjects
- Animals, Tenebrio chemistry, Chemical Precipitation, Solubility, Hydrogen-Ion Concentration, Food Handling, Ultrafiltration, Hydrophobic and Hydrophilic Interactions, Insect Proteins chemistry, Insect Proteins isolation & purification
- Abstract
Edible insects represent a great alternative protein source but food neophobia remains the main barrier to consumption. However, the incorporation of insects as protein-rich ingredients, such as protein concentrates, could increase acceptance. In this study, two methods, isoelectric precipitation and ultrafiltration-diafiltration, were applied to produce mealworm protein concentrates, which were compared in terms of composition, protein structure and techno-functional properties. The results showed that the protein content of the isoelectric precipitation concentrate was higher than ultrafiltration-diafiltration (80 versus 72%) but ash (1.91 versus 3.82%) and soluble sugar (1.43 versus 8.22%) contents were lower. Moreover, the protein structure was affected by the processing method, where the ultrafiltration-diafiltration concentrate exhibited a higher surface hydrophobicity (493.5 versus 106.78 a.u) and a lower denaturation temperature (161.32 versus 181.44 °C). Finally, the ultrafiltration-diafiltration concentrate exhibited higher solubility (87 versus 41%) and emulsifying properties at pH 7 compared to the concentrate obtained by isoelectric precipitation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
44. Shared immunogenic epitopes between host entry and exit proteins from monkeypox and Alaskapox viruses.
- Author
-
de Araújo LP, Silva EN, Corsetti PP, and de Almeida LA
- Subjects
- Humans, Monkeypox virus immunology, Monkeypox virus genetics, Virus Internalization, Animals, Poxviridae Infections immunology, Poxviridae Infections virology, Viral Proteins immunology, Epitopes immunology
- Abstract
Competing Interests: We declare no competing interests. The authors acknowledge the financial support by Brazilian agencies. This study was supported in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) (Grant/Award Number: 001) and Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) (Grant/Award Number: BPD-00626-22 and APQ-01297-23). LPDA: conceptualisation, data curation, formal analysis, investigation, methodology, validation, and writing - original draft. ENS: conceptualisation, formal analysis, validation, and writing. PPC and LADA: conceptualisation, data curation, formal analysis, investigation, resources, supervision, validation, visualisation, and writing - original draft.
- Published
- 2024
- Full Text
- View/download PDF
45. Effects of geographical origin and post-harvesting processing on the bioactive compounds and sensory quality of Brazilian specialty coffee beans.
- Author
-
Tieghi H, Pereira LA, Viana GS, Katchborian-Neto A, Santana DB, Mincato RL, Dias DF, Chagas-Paula DA, Soares MG, de Araújo WG, and Bueno PCP
- Subjects
- Brazil, Alkaloids analysis, Chromatography, High Pressure Liquid, Humans, Taste, Principal Component Analysis, Coffea chemistry, Seeds chemistry, Food Handling methods, Coffee chemistry
- Abstract
Specialty coffee beans are those produced, processed, and characterized following the highest quality standards, toward delivering a superior final product. Environmental, climatic, genetic, and processing factors greatly influence the green beans' chemical profile, which reflects on the quality and pricing. The present study focuses on the assessment of eight major health-beneficial bioactive compounds in green coffee beans aiming to underscore the influence of the geographical origin and post-harvesting processing on the quality of the final beverage. For that, we examined the non-volatile chemical profile of specialty Coffea arabica beans from Minas Gerais state, Brazil. It included samples from Cerrado (Savannah), and Matas de Minas and Sul de Minas (Atlantic Forest) regions, produced by two post-harvesting processing practices. Trigonelline, theobromine, theophylline, chlorogenic acid derivatives, caffeine, caffeic acid, ferulic acid, and p-coumaric acid were quantified in the green beans by high-performance liquid chromatography with diode array detection. Additionally, all samples were roasted and subjected to sensory analysis for coffee grading. Principal component analysis suggested that Cerrado samples tended to set apart from the other geographical locations. Those samples also exhibited higher levels of trigonelline as confirmed by two-way ANOVA analysis. Samples subjected to de-pulping processing showed improved chemical composition and sensory score. Those pulped coffees displayed 5.8% more chlorogenic acid derivatives, with an enhancement of 1.5% in the sensory score compared to unprocessed counterparts. Multivariate logistic regression analysis pointed out altitude, ferulic acid, p-coumaric acid, sweetness, and acidity as predictors distinguishing specialty coffee beans obtained by the two post-harvest processing. These findings demonstrate the influence of regional growth conditions and post-harvest treatments on the chemical and sensory quality of coffee. In summary, the present study underscores the value of integrating target metabolite analysis with statistical tools to augment the characterization of specialty coffee beans, offering novel insights for quality assessment with a focus on their bioactive compounds., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
46. Metallic nanoparticles and treatment of cutaneous leishmaniasis: A systematic review.
- Author
-
Guerra RO, do Carmo Neto JR, da Silva PEF, Franco PIR, Barbosa RM, de Albuquerque Martins T, Costa-Madeira J, de Assunção TSF, de Oliveira CJF, Machado JR, Silva Teixeira LA, Rodrigues WF, Júnior VR, Silva ACA, and da Silva MV
- Subjects
- Animals, Humans, Leishmania drug effects, Silver chemistry, Silver pharmacology, Leishmaniasis, Cutaneous drug therapy, Metal Nanoparticles chemistry, Metal Nanoparticles therapeutic use
- Abstract
Background: Cutaneous leishmaniasis (LC) is an infectious vector-borne disease caused by parasites belonging to the genus Leishmania. Metallic nanoparticles (MNPs) have been investigated as alternatives for the treatment of LC owing to their small size and high surface area. Here, we aimed to evaluate the effect of MNPs in the treatment of LC through experimental, in vitro and in vivo investigations., Methods: The databases used were MEDLINE/ PubMed, Scopus, Web of Science, Embase, and Science Direct. Manual searches of the reference lists of the included studies and grey literature were also performed. English language and experimental in vitro and in vivo studies using different Leishmania species, both related to MNP treatment, were included. This study was registered in PROSPERO (CRD42021248245)., Results: A total of 93 articles were included. Silver nanoparticles are the most studied MNPs, and L. tropica is the most studied species. Among the mechanisms of action of MNPs in vitro, we highlight the production of reactive oxygen species, direct contact of MNPs with the biomolecules of the parasite, and release of metal ions., Conclusion: MNPs may be considered a promising alternative for the treatment of LC, but further studies are needed to define their efficacy and safety., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier GmbH. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
47. Unveiling the Anatomical and Functional Attributes of Stipular Colleters in Palicourea tetraphylla Cham. & Schltdl. and Palicourea rudgeoides (Müll. Arg.) Standl. (Rubiaceae).
- Author
-
Bezerra LA, Miguel EC, Alexandrino CR, de Azevedo Rangel Miguel TB, Gomes VM, and Da Cunha M
- Abstract
The characterization of colleters in Rubiaceae is crucial for understanding their role in plant function. Analyzing colleters in Palicourea tetraphylla and Palicourea rudgeoides aims to deepen the understanding of these structures morphoanatomical and functional characteristics. The study reveals colleters with palisade epidermis and a parenchymatic central axis, classified as standard type, featuring vascularization and crystals. Colleter secretion, abundant in acidic mucopolysaccharides, proteins, and phenolic compounds, protects against desiccation. The ontogenesis, development, and senescence of the colleters are quite rapid and fulfill their role well in biotic and abiotic protection because these structures are present at different stages of development in the same stipule. Pronounced protrusions on the colleters surface, coupled with the accumulation of secretion in the intercellular and subcuticular spaces, suggest that the secretory process occurs through the wall, driven by pressure resulting from the accumulation of secretion. The microorganisms in the colleters' secretion, especially in microbiota-rich environments such as the Atlantic Forest, provide valuable information about plant-microorganism interactions, such as resistance to other pathogens and organisms and ecological balance. This enhanced understanding of colleters contributes to the role of these structures in the plant and enriches knowledge about biological interactions within specific ecosystems and the family taxonomy.
- Published
- 2024
- Full Text
- View/download PDF
48. Notified cases of mpox in the city of Rio de Janeiro, Brazil: a descriptive study, 2022.
- Author
-
Ribeiro CLP, D'Oliveira CAFB, Campos ÉA, Carvalho LF, Pinto LA, Duffrayer KM, Magalhães PH, Proença R, Cerbino Neto J, Aguilar GMO, and Garcia MHO
- Subjects
- Humans, Male, Adult, Female, Brazil epidemiology, Cities, Incidence, Socioeconomic Factors, Mpox, Monkeypox
- Abstract
Objective: To describe the profile of cases of mpox in the city of Rio de Janeiro between June and November 2022., Methods: This was a descriptive study of secondary data obtained from mpox notification forms. Socioeconomic, clinical and spatial data were analyzed., Results: Of the 928 cases, 93.7% were male, 85.0% cisgender male, 65.6% homosexual, 41.8% between 30 and 39 years old, and 41.0% were of White race/skin color. A total of 34.5% had immunosuppression due to illness, and 41.9% reported their HIV status as being positive. The most prevalent signs and symptoms were: skin lesions (96.6%), especially with multiple manifestations (67.8%) in the genital region (46.1%), in addition to fever (58.3%), adenomegaly (43.3%) and headache (38.7%). Most notifications occurred in public services (81.3%) and in hospital care (51.3%)., Conclusion: The study revealed high incidence of mpox, especially among young, cisgender and homosexual men. Most cases were mild, with genital lesions, progressing to cure without hospitalization. Person-to-person transmission was predominant.
- Published
- 2024
- Full Text
- View/download PDF
49. Immunoinformatic Approach for Rational Identification of Immunogenic Peptides Against Host Entry and/or Exit Mpox Proteins and Potential Multiepitope Vaccine Construction.
- Author
-
de Araújo LP, de Melo Santos NC, Corsetti PP, and de Almeida LA
- Subjects
- Humans, Molecular Docking Simulation, Peptides, Epitopes, Epitopes, T-Lymphocyte, Epitopes, B-Lymphocyte, Computational Biology, Vaccines, Subunit, Immunoinformatics, Mpox, Monkeypox
- Abstract
COVID-19 has intensified humanity's concern about the emergence of new pandemics. Since 2018, epidemic outbreaks of the mpox virus have become worrisome. In June 2022, the World Health Organization declared the disease a global health emergency, with 14 500 cases reported by the Centers for Disease Control and Prevention in 60 countries. Therefore, the development of a vaccine based on the current virus genome is paramount in combating new cases. In view of this, we hypothesized the obtainment of rational immunogenic peptides predicted from proteins responsible for entry of the mpox virus into the host (A17L, A26L/A30L, A33R, H2R, L1R), exit (A27L, A35R, A36R, C19L), and both (B5R). To achieve this, we aligned the genome sequencing data of mpox virus isolated from an infected individual in the United States in June 2022 (ON674051.1) with the reference genome dated 2001 (NC_003310.1) for conservation analysis. The Immune Epitope Database server was used for the identification and characterization of the epitopes of each protein related to major histocompatibility complex I or II interaction and recognition by B-cell receptors, resulting in 138 epitopes for A17L, 233 for A28L, 48 for A33R, 77 for H2R, 77 for L1R, 270 for A27L, 72 for A35R, A36R, 148 for C19L, and 276 for B5R. These epitopes were tested in silico for antigenicity, physicochemical properties, and allergenicity, resulting in 51, 40, 10, 34, 38, 57, 25, 7, 47, and 53 epitopes, respectively. Additionally, to select an epitope with the highest promiscuity of binding to major histocompatibility complexes and B-cell receptor simultaneously, all epitopes of each protein were aligned, and the most repetitive and antigenic regions were identified. By classifying the results, we obtained 23 epitopes from the entry proteins, 16 from the exit proteins, and 7 from both. Subsequently, 1 epitope from each protein was selected, and all 3 were fused to construct a chimeric protein that has potential as a multiepitope vaccine. The constructed vaccine was then analyzed for its physicochemical, antigenic, and allergenic properties. Protein modeling, molecular dynamics, and molecular docking were performed on Toll-like receptors 2, 4, and 8, followed by in silico immune simulation of the vaccine. Finally, the results indicate an effective, stable, and safe vaccine that can be further tested, especially in vitro and in vivo, to validate the findings demonstrated in silico., Competing Interests: Potential conflicts of interest. All authors: No reported conflicts. All authors have submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest., (© The Author(s) 2023. Published by Oxford University Press on behalf of Infectious Diseases Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
- Published
- 2024
- Full Text
- View/download PDF
50. Extracts from jatobá ( Hymenaea courbaril L.) peel and seeds: Antioxidant and antimicrobial activities and synergistic effect of extract combinations.
- Author
-
Scaramussa SAL, Soares LA, and Santana LCLA
- Subjects
- Antioxidants pharmacology, Antioxidants analysis, Plant Extracts chemistry, Seeds, Fruit chemistry, Bacteria, Ethanol, Hymenaea, Anti-Infective Agents pharmacology, Anti-Infective Agents chemistry
- Abstract
In this work, the in vitro antioxidant and antimicrobial potential of hydroalcoholic extracts from the peel and seeds of jatobá fruit and the synergistic effect of their combination against pathogenic bacteria were evaluated. The 80% ethanol fruit seed extract showed a greater antioxidant potential and higher total phenolic content (5135.61 GAE/100 g dry residue) than the maximum value obtained from peel extract using 50% ethanol (2614.74 1 GAE/100 g dry residue). Moreover, 70% and 80% ethanol seed extracts inhibited most bacteria, especially Pseudomonas aeruginosa , with the lowest values of minimum inhibitory concentration (1.0 and 8.0 mg/mL), when compared with extracts from peel. Combining the 70% ethanol extracts from peels and seeds reduced their inhibitory concentration by about 4 to 32 times against Bacillus cereus , Bacillus subtilis, Enterococcus faecalis, Staphylococcus aureus, P. aeruginosa and Salmonella enteritidis , when compared to each extract alone. Extracts from the peel and seeds of the jatobá fruit showed potential as natural antioxidants and antimicrobials., Competing Interests: DECLARATION OF CONFLICTING INTERESTSThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
- Published
- 2024
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.