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125 results on '"Ando, Rômulo Augusto"'

12. More than just sweet: current insights into microplastics in honey products and a case study of Melipona quadrifasciata honey.

Author

Rani-Borges, Bárbara, Arena, Mariana Victorino Nicolosi, Gomes, Ingrid Naiara, Lins, Luís Henrique França de Carvalho, Cestaro, Livia de Souza Camargo, Pompêo, Marcelo, Ando, Rômulo Augusto, Alves-dos-Santos, Isabel, Toppa, Rogério Hartung, Martines, Marcos Roberto, and Queiroz, Lucas Gonçalves

Abstract

Honey, traditionally known as a pure and natural substance, has become an unexpected reservoir for microplastic contamination. This study consisted of an experimental investigation to assess the occurrence of microplastics in honey produced by Melipona quadrifasciata, a native bee species in Brazil. Our investigation covers eight areas (one sample per area), including built and vegetated areas located in São Paulo city, Brazil, to understand the distribution of microplastics in these environments. Honey samples (10 mL) were collected using a syringe and sent to the laboratory for further analysis. Microplastics extracted from honey samples were characterized under a stereomicroscope to determine their size, color, and morphology. Also, the polymer type was determined by FTIR analysis. All honey samples (100%) showed microplastics. The predominant particles displayed a fiber shape with a size below 299 μm and a transparent color and were primarily composed of polypropylene. Their concentrations ranged from 0.1 to 2.6 particles per mL of honey, raising concerns about their potential impact on bee populations and human consumers. This study underscores the need for further research on the sources and implications of microplastic contamination in Melipona quadrifasciata honey, shedding light on the broader issue of environmental plastic pollution and its impact on pollinators. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Airborne microplastics and SARS-CoV-2 in total suspended particles in the area surrounding the largest medical centre in Latin America

Author

Amato-Lourenço, Luís Fernando, de Souza Xavier Costa, Natália, Dantas, Kátia Cristina, dos Santos Galvão, Luciana, Moralles, Fernando Negri, Lombardi, Suzette Cleuza Ferreira Spina, Júnior, Alfredo Mendroni, Lindoso, José Angelo Lauletta, Ando, Rômulo Augusto, Lima, Felipe Gallego, Carvalho-Oliveira, Regiani, and Mauad, Thais

Published
2022
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21. Single‐Atoms on Crystalline Carbon Nitrides for Selective C─H Photooxidation: A Bridge to Achieve Homogeneous Pathways in Heterogeneous Materials.

Author

da Silva, Marcos A. R., Tarakina, Nadezda V., Filho, José B. G., Cunha, Carla S., Rocha, Guilherme F. S. R., Diab, Gabriel A. A., Ando, Rômulo Augusto, Savateev, Oleksandr, Agirrezabal‐Telleria, Iker, Silva, Ingrid F., Stolfi, Sara, Ghigna, Paolo, Fagnoni, Maurizio, Ravelli, Davide, Torelli, Piero, Braglia, Luca, and Teixeira, Ivo F.

Published
2023
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23. A simple visible light photo-assisted method for assembling and curing multilayer GO thin films

Author

da Silva, Mauro Francisco Pinheiro, de Oliveira, Débora Rose, Cavallari, Marco Roberto, Tadeu Dirani, Ely Antonio, Triboni, Eduardo Rezende, Paterno, Leonardo Giordano, Fonseca, Fernando Josepetti, Ando, Rômulo Augusto, da Silva Baptista, Maurício, Landers, Richard, Politi, Mário Jose, Isolani, Paulo Celso, and Bernardo Lenz e Silva, Guilherme Frederico

Published
2015
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28. Realistic environmental exposure to secondary PET microplastics induces biochemical responses in freshwater amphipod Hyalella azteca.

Author

Queiroz, Lucas Gonçalves, Rani-Borges, Bárbara, Prado, Caio César Achiles, Moraes, Beatriz Rocha de, Ando, Rômulo Augusto, Paiva, Teresa Cristina Brazil de, and Pompêo, Marcelo

Subjects
MICROPLASTICS, FRESH water, ENVIRONMENTAL exposure, INVERTEBRATE communities, BIOMARKERS, OXIDATIVE stress, PLASTICS, POLYETHYLENE terephthalate
Abstract

Freshwater environments are especially susceptible to microplastic contamination due to their proximity to urbanised and industrial areas. Also, there is a lack of information about the effects of this pollutant on freshwaters making it difficult the conservation of these environments. Benthic species, such as the freshwater amphipod Hyalella azteca, have been superficially studied so far for evaluation of microplastic pollution. In the present study, we analyzed whether polyethylene terephthalate (PET) microplastics could lead to reduced survival of H. azteca or changes in biochemical markers (SOD, CAT, MDA, and GST) at environmentally relevant concentrations (60 and 600 particles) after 7 d of exposure. The results showed that there was no significant mortality at any of the concentrations tested. The enzyme CAT showed no variation compared to the control group at any of the concentrations. SOD, MDA, and GST were statistically different (p < 0.05). Our study demonstrated that PET MP did not affect the survival of H. azteca at environmentally relevant concentrations. However, changes in biomarkers of oxidative stress may be detected at low level of exposure (60 particles). Although survival is not affected, the macrobenthic invertebrate community may be under threat in environments where there is PET microplastic pollution. [ABSTRACT FROM AUTHOR]

Published
2023
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33. Effects of ABS microplastics on microalgae Chlorella vulgaris and Raphidocelis subcapitata.

Author

Rani-Borges, Bárbara, Queiroz, Lucas Gonçalves, Ferreira, Karen de Souza, Gomes Martins, Thaís Fabiane, Vicente, Eduardo, Ando, Rômulo Augusto, and Pompêo, Marcelo

Subjects
MICROPLASTICS, CHLORELLA vulgaris, MICROALGAE, INTEGRAL functions, CELL growth, CHLOROPHYLL
Abstract

In recent years, there has been a growing interest in the impacts caused by the presence of microplastics (MP) in aquatic environments. The impacts of microalgae exposure to microplastics are still insufficiently investigated and further studies are needed to understand the possible outcomes. In addition, much of the literature has focused on the study of concentrations above those found naturally in the environment and in less toxic polymer matrices. Acrylonitrile-butadiene-styrene (ABS) plastics have a composition rich in additives and, so far, have been studied superficially. In the present study, two of the most commonly used green microalgae species in toxicity assays, Chlorella vulgaris and Raphidocelis subcapitata, were exposed to different concentrations of primary ABS-MP for a period of 6 days. Here, we observed physiological changes in cell growth and chlorophyll a content induced by the concentration and time of exposure to ABS-MP. The lowest concentration did not prove to be potentially toxic to cells, while the highest concentration was the most toxic. Primary consumers, such as microalgae, are essential for the proper functioning of entire ecosystems. Changes in these communities can lead to permanent damage to the communities of organisms at higher levels, so it is essential that their study be done carefully in the face of threats such as MP. Chlorella vulgaris and Raphidocelis subcapitata, were exposed to different concentrations of ABS microplastics during 6 days. We observed physiological changes in cell growth and chlorophyll content in response to the concentration and duration of exposure. [ABSTRACT FROM AUTHOR]

Published
2023
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35. Microplastics in the Olfactory Bulb of the Human Brain.

Author

Amato-Lourenço, Luís Fernando, Dantas, Katia Cristina, Júnior, Gabriel Ribeiro, Paes, Vitor Ribeiro, Ando, Rômulo Augusto, de Oliveira Freitas, Raul, da Costa, Ohanna Maria Menezes M., Rabelo, Renata S., Soares Bispo, Kelly Cristina, Carvalho-Oliveira, Regiani, and Mauad, Thais

Published
2024
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37. Improving CO2 absorption in viscous ionic liquids

Author

Lepre, Luiz Fernando, Ando, Rômulo Augusto, Pádua, Agílio, Costa Gomes, Margarida, Institut de Chimie de Clermont-Ferrand (ICCF), SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie, Ecole Normale Supérieure de Lyon and CNRS, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Laboratoire de Chimie - UMR5182 (LC), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, ComputingMilieux_MISCELLANEOUS, Ionic liquids
Abstract

International audience

Published
2018

39. Gas separations using ionic liquids and their mixtures

Author

Costa Gomes, Margarida, Lepre, Luiz Fernando, Szala-Bilnik, Joanna, Ando, Rômulo Augusto, Pádua, Agílio, Institut de Chimie de Clermont-Ferrand (ICCF), SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, and Padua, Agilio

Subjects
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistry, Ionic liquid, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

40. Can mixtures of ionic liquids improve gas separations?

Author

Costa Gomes, Margarida, Lepre, Luiz Fernando, Szala-Bilnik, Joanna, Ando, Rômulo Augusto, Pádua, Agílio, Institut de Chimie de Clermont-Ferrand (ICCF), SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, and Padua, Agilio

Subjects
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistry, Ionic liquid, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

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