887 results on '"Fiorani, P"'
Search Results
2. Low-cost immunosensing approach for Chagas disease: exploiting modified pencil graphite electrodes with polymer films
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de Oliveira Almeida, Andressa, Coelho, Rafael Mendes, Machado, Ângelo Rafael, Martins, Helen Rodrigues, Pereira, Arnaldo César, Santos, Fred Luciano Neves, Celedon, Paola Alejandra Fiorani, and Ferreira, Lucas Franco
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- 2024
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3. Celebrating the 500th anniversary of Leonardo Da Vinci’s death in his birthplace: Roberta Barsanti and Monica Taddei (eds.): Omaggio a Leonardo per cinque secoli di storia 1519–2019. Florence: Leo S. Olschki, 2023, 152 pp, 53 color illustrations, €32.00 PB
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Fiorani, Francesca
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- 2024
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4. Electrogenerated chemiluminescence from luminol-labelled microbeads triggered by in situ generation of hydrogen peroxide
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Fiorani, Andrea, Santo, Claudio Ignazio, Sakanoue, Kohei, Calabria, Donato, Mirasoli, Mara, Paolucci, Francesco, Valenti, Giovanni, and Einaga, Yasuaki
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- 2024
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5. Exploring the potential of laser photoacoustic spectroscopy (LPAS) for predicting amylose content in rice flour
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Florinda Artuso, Claudio Ciceroni, Luca Fiorani, Isabella Giardina, Massimo Francucci, Antonia Lai, Ivano Menicucci, Marcello Nuvoli, and Fabio Pollastrone
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laser photoacoustic spectroscopy ,amylose ,rice flour ,non-destructive analysis ,Food processing and manufacture ,TP368-456 ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Aim: Rice, one of the most widely consumed staple foods globally, relies on amylose content for its quality, impacting cooking, digestibility, and health properties. Conventional amylose determination methods are time-consuming and involve complex chemical treatments. Thus, there is growing interest in rapid, non-destructive techniques for food quality control. This study explores the potential of laser photoacoustic spectroscopy (LPAS) for predicting amylose content in rice flour. Methods: Certified rice flour standards of varying amylose levels have been analyzed using a quantum-cascade LPAS system. Preliminary analysis utilized Fourier transform infrared/attenuated total reflectance (FTIR/ATR) to identify rice starch spectral features in the IR region. Multivariate data tools like principal component analysis (PCA) and partial least squares (PLS) regression have been combined with LPAS measurements to extract information from the complex spectral data set and to demonstrate the ability of the system to predict their amylose content. Results: LPAS spectra, recorded between 7.0–11.0 μm, displayed two broad bands, showing a linear increase in signal with amylose content, especially notable in the specific fingerprint region within 8.5–10.0 μm. The prominent peak at 9.3 μm exhibited a high linear correlation with amylose levels (R2 > 0.99). PCA effectively differentiated rice flour samples, while PLS accurately predicted amylose content. The difference between predicted and actual amylose is significantly less than the statistical error of the measurement. Conclusions: LPAS combined with chemometric analysis emerges as a promising non-destructive method for rapidly assessing rice amylose content, potentially supplementing or replacing current standard methods. Its advantages, limitations, and future prospects in rice quality analysis are discussed, highlighting its role in preliminary screening.
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- 2024
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6. Monotonicity formula and stratification of the singular set of perimeter minimizers in RCD spaces
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Fiorani, Francesco, Mondino, Andrea, and Semola, Daniele
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Mathematics - Differential Geometry ,Mathematics - Metric Geometry - Abstract
The goal of this paper is to establish a monotonicity formula for perimeter minimizing sets in RCD(0,N) metric measure cones, together with the associated rigidity statement. The applications include sharp Hausdorff dimension estimates for the singular strata of perimeter minimizing sets in non collapsed RCD spaces and the existence of blow-down cones for global perimeter minimizers in Riemannian manifolds with nonnegative Ricci curvature and Euclidean volume growth., Comment: 37 pages
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- 2023
7. Evaluation of chimeric recombinant antigens for the serodiagnosis of Trypanosoma cruzi in dogs: a promising tool for Chagas disease surveillance
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Natália Dantas Fontes, Fernanda Lopes Habib, Leonardo Maia Leony, Natália Erdens Maron Freitas, Ângelo Antônio Oliveira Silva, Filipe Dantas-Torres, Kamila Gaudêncio da Silva Sales, Antônia Cláudia Jácome da Câmara, Vicente Toscano de Araújo-Neto, Leila Denise Alves Ferreira Amorim, Paola Alejandra Fiorani Celedon, Nilson Ivo Tonin Zanchin, and Fred Luciano Neves Santos
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Chagas disease ,Trypanosoma cruzi ,Canine serodiagnosis ,Recombinant chimeric antigens ,Latent class analysis ,Diagnostic performance ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Chagas disease (CD), a neglected parasitic disease caused by Trypanosoma cruzi, poses a significant health threat in Latin America and has emerged globally because of human migration. Trypanosoma cruzi infects humans and over 100 other mammalian species, including dogs, which are important sentinels for assessing the risk of human infection. Nonetheless, the serodiagnosis of T. cruzi in dogs is still impaired by the absence of commercial tests. In this study, we investigated the diagnostic accuracy of four chimeric recombinant T. cruzi IBMP antigens (IBMP-8.1, IBMP-8.2, IBMP-8.3, and IBMP-8.4) for detecting anti-T. cruzi antibodies in dogs, using latent class analysis (LCA). Methods We examined 663 canine serum samples, employing indirect ELISA with the chimeric antigens. LCA was utilized to establish a latent variable as a gold standard for T. cruzi infection, revealing distinct response patterns for each antigen. Results The IBMP (Portuguese acronym for the Molecular Biology Institute of Paraná) antigens achieved area under the ROC curve (AUC) values ranging from 90.9% to 97.3%. The highest sensitivity was attributed to IBMP-8.2 (89.8%), while IBMP-8.1, IBMP-8.3, and IBMP-8.4 achieved 73.5%, 79.6%, and 85.7%, respectively. The highest specificity was observed for IBMP-8.4 (98.6%), followed by IBMP-8.2, IBMP-8.3, and IBMP-8.1 with specificities of 98.3%, 94.4%, and 92.7%, respectively. Predictive values varied according to prevalence, indicating higher effectiveness in endemic settings. Conclusions Our findings underscore the remarkable diagnostic performance of IBMP-8.2 and IBMP-8.4 for the serodiagnosis of Trypanosoma cruzi in dogs, representing a promising tool for the diagnosis of CD in dogs. These chimeric recombinant antigens may not only enhance CD surveillance strategies but also hold broader implications for public health, contributing to the global fight against this neglected tropical disease. Graphical Abstract
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- 2024
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8. From theory to practice: understanding the challenges in the implementation of electrogenerated chemiluminescence for analytical applications
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Giagu, Gabriele, Fracassa, Alessandro, Fiorani, Andrea, Villani, Elena, Paolucci, Francesco, Valenti, Giovanni, and Zanut, Alessandra
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- 2024
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9. Precrop-treated soil influences wheat (Triticum aestivum L.) root system architecture and its response to drought
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Jonathan E. Cope, Fede Berckx, Anna Galinski, Jonas Lentz, Kerstin A. Nagel, Fabio Fiorani, and Martin Weih
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root system architecture ,Triticum aestivum ,precrop effect ,water stress ,rhizotron ,G×E interaction ,Plant culture ,SB1-1110 - Abstract
AimsRoot system architecture (RSA) plays an important role in the plant’s ability to sustain yield under abiotic stresses such as drought. Preceding crops (precrops) can affect the yield of the proceeding crop, partially by affecting the RSA. This experiment aims to explore the interactions between precrop identity, crop genotype and drought at early growth stages.MethodsRhizotrons, sized 60 × 80 × 3.5 cm, were used to assess the early root growth of two winter wheat (Triticum aestivum L.) genotypes, using precrop-treated soil around the seedlings and differing water regimes. The rhizotrons were automatically imaged 3 times a week to track root development.ResultsPrecrop-treated soil affected the RSA and changes caused by the reduced water treatment (RWT) were different depending on the precrop. Largest of these was the 36% reduction in root depth after wheat, but 44% after OSR. This indicates that effects caused by the precrop can be simulated, at least partially, by transferring precrop-treated soils to controlled environments. The genotypes had differential RSA and reacted differently to the RWT, with Julius maintaining an 8.8-13.1% deeper root system compared to Brons in the RWT. In addition, the combined environmental treatment affected the genotypes differently.ConclusionOur results could help explain discrepancies found from using precrops to enhance yield as they indicate differences in the preceding crop effect when experiencing drought stress. Further, these differences are affected by genotypic interactions, which can be used to select and adapt crop genotypes for specific crop rotations, depending on the year. Additionally, we have shown a viable method of stimulating a partial precrop effect at the seedling stage in a controlled greenhouse setting using field soil around the germinated seed.
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- 2024
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10. E.L., a modern-day Phineas Gage: Revisiting frontal lobe injury
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de Freitas, Pedro HM, Monteiro, Ruy C, Bertani, Raphael, Perret, Caio M, Rodrigues, Pedro C, Vicentini, Joana, de Morais, Tagore M Gonzalez, Rozental, Stefano FA, Galvão, Gustavo F, de Mattos, Fabricio, Vasconcelos, Fernando A, Dorio, Ivan S, Hayashi, Cintya Y, dos Santos, Jorge RL, Werneck, Guilherme L, Tocquer, Carla T Ferreira, Capitão, Claudia, da Cruz, Luiz C Hygino, Tulviste, Jaan, Fiorani, Mario, da Silva, Marcos M, Paiva, Wellingson S, Podell, Kenneth, Federoff, Howard J, Patel, Divyen H, Lado, Fred, Goldberg, Elkhonon, Llinás, Rodolfo, Bennett, Michael VL, and Rozental, Renato
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Biological Psychology ,Cognitive and Computational Psychology ,Biomedical and Clinical Sciences ,Psychology ,Brain Disorders ,Physical Injury - Accidents and Adverse Effects ,Neurosciences ,Behavioral and Social Science ,Aetiology ,2.1 Biological and endogenous factors ,Mental health ,Neurological ,Traumatic brain injury ,Phineas Gage ,Prefrontal cortex ,Corpus callosum ,Magnetic Resonance Imaging ,Neuropsychological tests ,Transcranial Magnetic Stimulation ,Low Frequency Oscillations ,C.C. ,Corpus callosum ,LFO ,Low frequency oscillations ,MRI ,Magnetic Resonance Imaging ,PFC ,Prefrontal cortex ,TBI ,Traumatic brain injury ,TMS ,Transcranial magnetic stimulation - Abstract
BackgroundHow the prefrontal cortex (PFC) recovers its functionality following lesions remains a conundrum. Recent work has uncovered the importance of transient low-frequency oscillatory activity (LFO; < 4 Hz) for the recovery of an injured brain. We aimed to determine whether persistent cortical oscillatory dynamics contribute to brain capability to support 'normal life' following injury.MethodsIn this 9-year prospective longitudinal study (08/2012-2021), we collected data from the patient E.L., a modern-day Phineas Gage, who suffered from lesions, impacting 11% of his total brain mass, to his right PFC and supplementary motor area after his skull was transfixed by an iron rod. A systematic evaluation of clinical, electrophysiologic, brain imaging, neuropsychological and behavioural testing were used to clarify the clinical significance of relationship between LFO discharge and executive dysfunctions and compare E.L.´s disorders to that attributed to Gage (1848), a landmark in the history of neurology and neuroscience.FindingsSelective recruitment of the non-injured left hemisphere during execution of unimanual right-hand movements resulted in the emergence of robust LFO, an EEG-detected marker for disconnection of brain areas, in the damaged right hemisphere. In contrast, recruitment of the damaged right hemisphere during contralateral hand movement, resulted in the co-activation of the left hemisphere and decreased right hemisphere LFO to levels of controls enabling performance, suggesting a target for neuromodulation. Similarly, transcranial magnetic stimulation (TMS), used to create a temporary virtual-lesion over E.L.'s healthy hemisphere, disrupted the modulation of contralateral LFO, disturbing behaviour and impairing executive function tasks. In contrast to Gage, reasoning, planning, working memory, social, sexual and family behaviours eluded clinical inspection by decreasing LFO in the delta frequency range during motor and executive functioning.InterpretationOur study suggests that modulation of LFO dynamics is an important mechanism by which PFC accommodates neurological injuries, supporting the reports of Gage´s recovery, and represents an attractive target for therapeutic interventions.FundingFundação de Amparo Pesquisa Rio de Janeiro (FAPERJ), Universidade Federal do Rio de Janeiro (intramural), and Fiocruz/Ministery of Health (INOVA Fiocruz).
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- 2022
11. Operaciones intertextuales en torno a Kafka y al judaísmo: dos novelas de Moacyr Scliar
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Flavio Fiorani
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kafka ,scliar ,translation ,judaism ,human/animal ,Language and Literature - Abstract
Os Leopardos de Kafka (2000) and O Centauro no Jardim (1980) by Moacyr Scliar are fictions which compel us to think about the processes of hybridization nesting in every border crossing (linguistic and corporal) when diasporic subjects abandon consolidated values and put into play the notion of belonging. This essay investigates the intertextual relations between the two authors and highlights how the deterritorialized condition of Kafka’s writing and the metamorphosis which informs all translation-interpretation constitute a fertile perspective from which to approach Scliar’s novels.
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- 2023
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12. Development and Test of Low-Cost Multi-Channel Multi-Frequency Lock-In Amplifier for Health and Environment Sensing
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Fabio Pollastrone, Luca Fiorani, Ramanand Bisauriya, Ivano Menicucci, Claudio Ciceroni, and Roberto Pizzoferrato
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lock-in amplifier (LIA) ,digital signal processing ,photoluminescence measurements ,microcontroller ,Chemical technology ,TP1-1185 - Abstract
Optical-based sensing techniques and instruments, such as fluorometric systems, absorbance-based sensors, and photoacoustic spectrometers, are important tools for detecting food fraud, adulteration, and contamination for health and environmental purposes. All the aforementioned optical equipments generally require one or more low-frequency Lock-In Amplifiers (LIAs) to extract the signal of interest from background noise. In the cited applications, the required LIA frequency is quite low (up to 1 kHz), and this leads to a simplification of the hardware with consequent good results in portability, reduced size, weight, and low-cost characteristics. The present system, called ENEA DSP Box Due, is based on a very inexpensive microcontroller proto-board and can replace four commercial LIAs, resulting in significant savings in both cost and space. Furthermore, it incorporates a dual-channel oscilloscope and a sinusoidal function generator. This article outlines the architecture of the ENEA DSP Box Due, its electrical characterization, and its applications within a project concerning laser techniques for food and water safety.
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- 2024
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13. On the validity of the tight-binding method for describing systems of subwavelength resonators
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Ammari, Habib, Fiorani, Francesco, and Hiltunen, Erik Orvehed
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Mathematics - Analysis of PDEs ,Condensed Matter - Materials Science - Abstract
The goal of this paper is to relate the capacitance matrix formalism to the tight-binding approximation. By doing so, we open the way to the use of mathematical techniques and tools from condensed matter theory in the mathematical and numerical analysis of metamaterials, in particular for the understanding of their topological properties. We firstly study how the capacitance matrix formalism, both when the material parameters are static and modulated, can be posed in a Hamiltonian form. Then, we use this result to compare this formalism to the tight-binding approximation. We prove that the correspondence between the capacitance formulation and the tight-binding approximation holds only in the case of dilute resonators. On the other hand, the tight-binding model is often coupled with a nearest-neighbour approximation, whereby long-range interactions are neglected. Even in the dilute case, we show that long-range interactions between subwavelength resonators are relatively strong and nearest-neighbour approximations are not generally appropriate., Comment: 25 pages, 2 figures
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- 2021
14. Assessment of Fatty Acid and Oxylipin Profile of Resprouting Olive Trees Positive to Xylella fastidiosa subsp. pauca in Salento (Apulia, Italy)
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Valeria Scala, Marco Scortichini, Federico Marini, Dario La Montagna, Marzia Beccaccioli, Kristina Micalizzi, Andrea Cacciotti, Nicoletta Pucci, Giuseppe Tatulli, Riccardo Fiorani, Stefania Loreti, and Massimo Reverberi
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OQDS ,crown restoration ,satellite imagery ,fatty acid oxylipins ,defense-related hormones ,NDVI ,Botany ,QK1-989 - Abstract
Xylella fastidiosa subsp. pauca ST53 (XFP), the causal agent of olive quick decline syndrome (OQDS), was thoroughly investigated after a 2013 outbreak in the Salento region of Southern Italy. Some trees from Ogliarola Salentina and Cellina di Nardò, susceptible cultivars in the Gallipoli area, the first XFP infection hotspot in Italy, have resprouted crowns and are starting to flower and yield fruits. Satellite imagery and Normalized Difference Vegetation Index analyses revealed a significant improvement in vegetation health and productivity from 2018 to 2022 of these trees. Lipid molecules have long been recognized as plant defense modulators, and recently, we investigated their role in XFP-positive hosts and in XFP-resistant as well as in XFP-susceptible cultivars of olive trees. Here, we present a case study regarding 36 olive trees (12 XFP-positive resprouting, 12 XFP-positive OQDS-symptomatic, and 12 XFP-negative trees) harvested in 2022 within the area where XFP struck first, killing millions of trees in a decade. These trees were analyzed for some free fatty acid, oxylipin, and plant hormones, in particular jasmonic and salicylic acid, by targeted LC-MS/MS. Multivariate analysis revealed that lipid markers of resistance (e.g., 13-HpOTrE), along with jasmonic and salicylic acid, were accumulated differently in the XFP-positive resprouting trees from both cultivars with respect to XFP-positive OQDS symptomatic and XFP-negative trees, suggesting a correlation of lipid metabolism with the resprouting, which can be an indication of the resiliency of these trees to OQDS. This is the first report concerning the resprouting of OQDS-infected olive trees in the Salento area.
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- 2024
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15. Comprehensive Study of the IBMP ELISA IgA/IgM/IgG COVID-19 Kit for SARS-CoV-2 Antibody Detection
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Sibelle Botogosque Mattar, Paola Alejandra Fiorani Celedon, Leonardo Maia Leony, Larissa de Carvalho Medrado Vasconcelos, Daniel Dias Sampaio, Fabricio Klerynton Marchini, Luis Gustavo Morello, Vanessa Hoysan Lin, Sandra Crestani, Aquiles Assunção Camelier, André Costa Meireles, André Luiz Freitas de Oliveira Junior, Antônio Carlos Bandeira, Yasmin Santos Freitas Macedo, Alan Oliveira Duarte, Tycha Bianca Sabaini Pavan, Isadora Cristina de Siqueira, and Fred Luciano Neves Santos
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COVID-19 ,immunodiagnosis ,SARS-CoV-2 ,sensitivity ,specificity ,Medicine (General) ,R5-920 - Abstract
COVID-19 laboratory diagnosis primarily relies on molecular tests, highly sensitive during early infection stages with high viral loads. As the disease progresses, sensitivity decreases, requiring antibody detection. Since the beginning of the pandemic, serological tests have been developed and made available in Brazil, but their diagnostic performance varies. This study evaluated the IBMP ELISA IgA/IgM/IgG COVID-19 kit performance in detecting SARS-CoV-2 antibodies. A total of 90 samples, including 64 from COVID-19 patients and 26 pre-pandemic donors, were assessed based on time post symptom onset (0–7, 8–14, and 15–21 days). The kit showed 61% sensitivity, 100% specificity, and 72% accuracy overall. Sensitivity varied with time, being 25%, 57%, and 96% for 0–7, 8–14, and 15–21 days, respectively. Similar variations were noted in other commercial tests. The Gold ELISA COVID-19 (IgG/IgM) had sensitivities of 31%, 71%, and 100%, while the Anti-SARS-CoV-2 NCP ELISA (IgG) and Anti-SARS-CoV-2 NCP ELISA (IgM) showed varying sensitivities. The IBMP ELISA kit displayed high diagnostic capability, especially as the disease progressed, complementing COVID-19 diagnosis. Reproducibility assessment revealed minimal systematic and analytical errors. In conclusion, the IBMP ELISA IgA/IgM/IgG COVID-19 kit is a robust tool for detecting anti-SARS-CoV-2 antibodies, increasing in efficacy over the disease course, and minimizing false negatives in RT-PCR COVID-19 diagnosis.
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- 2024
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16. Ceramide releases exosomes with a specific miRNA signature for cell differentiation
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Federico Fiorani, Rossana Domenis, Emiliano Dalla, Samuela Cataldi, Carmela Conte, Martina Mandarano, Angelo Sidoni, Adriana Cifù, Tommaso Beccari, Alessandra Mirarchi, Cataldo Arcuri, Francesco Curcio, and Elisabetta Albi
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Medicine ,Science - Abstract
Abstract Exosomes are well established effectors of cell–cell communication. Their role on maturation of embryonic cells located in hippocampus, seat of memory, is unknown. Here we show that ceramide facilitates release of exosomes from HN9.10e cells extending information for cell differentiation to neighboring cells. We found only 38 miRNAs differentially expressed in exosomes derived from ceramide-treated cells in comparison with control cells (including 10 up-regulated and 28 down-regulated). Some overexpressed miRNAs (mmu-let-7f-1-3p, mmu-let-7a-1-3p, mmu-let-7b-3p, mmu-let-7b-5p, mmu-miR-330-3p) regulate genes encoding for protein involved in biological, homeostatic, biosynthetic and small molecule metabolic processes, embryo development and cell differentiation, all phenomena relevant for HN9.10e cell differentiation. Notably, the overexpressed mmu-let-7b-5p miRNA appears to be important for our study based on its ability to regulate thirty-five gene targets involved in many processes including sphingolipid metabolism, sphingolipid-related stimulation of cellular functions and neuronal development. Furthermore, we showed that by incubating embryonic cells with exosomes released under ceramide treatment, some cells acquired an astrocytic phenotype and others a neuronal phenotype. We anticipate our study to be a start point for innovative therapeutic strategies to regulate the release of exosomes useful to stimulate delayed brain development in the newborn and to improve the cognitive decline in neurodegenerative disorders.
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- 2023
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17. Laser-induced fluorescence study of medieval frescoes by Giusto de' Menabuoi
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Fantoni, Roberta, Caneve, Luisa, Colao, Francesco, Fiorani, Luca, Palucci, Antonio, dell'Erba, Ramiro, and Fassina, Vasco
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Physics - Applied Physics ,Condensed Matter - Materials Science - Abstract
Laser induced fluorescence (LIF) is a powerful remote and non-invasive analysis technique that has been successfully applied to the real-time diagnosis of historical artworks. Hyperspectral images collection on fresco' s and their false colours processing allowed to reveal features invisible to the naked eye and to obtain specific information on pigments composition and consolidants utilization, the latter also related to former restorations. This report presents the results obtained by ENEA LIF scanning system during a field campaign conducted in June 2010 on fresco's by Giusto de' Menabuoi in the Padua Baptistery. The data collected by LidArt allowed the detection of Paraloid B72 and Movilith/Primal AC33, guiding the restorers in their conservation actions.
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- 2020
18. Mundos aldeanos
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Valeria Franco Salvi, Julian Salazar, Jordi López Lillo, Agustina Vázquez Fiorani, and Juan Montegú
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relevamiento arqueológico ,valle de La Ciénega ,primer milenio de la Era ,aldeas ,Archaeology ,CC1-960 ,Anthropology ,GN1-890 ,Latin America. Spanish America ,F1201-3799 - Abstract
Los estudios realizados hasta el momento nos permiten concebir al valle de La Ciénega como un palimpsesto de prácticas humanas desde hace por lo menos 2500 años. La principal ocupación la registramos durante el primer milenio de la Era, aunque son numerosas las materialidades correspondientes al Período de Desarrollos Regionales y procesos posteriores hasta la actualidad. El objetivo de este artículo se dirige a presentar los resultados de prospecciones y relevamientos arqueológicos realizados en el Valle a los fines de analizar los paisajes, las relaciones, las tensiones y los procesos de cambio en la larga duración, principalmente, las escalas sociales y la vida cotidiana de las poblaciones que ocuparon el área durante el primer milenio de la Era.
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- 2023
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19. Colonic Epithelial Permeability to Ions Is Restored after Vedolizumab Treatment and May Predict Clinical Response in Inflammatory Bowel Disease Patients
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Michele Cicala, Manuele Gori, Paola Balestrieri, Annamaria Altomare, Alessandro Tullio, Simone Di Cola, Sander Dejongh, Maria Giovanna Graziani, Cristiano Pagnini, Simone Carotti, Giuseppe Perrone, Mentore Ribolsi, Marcello Fiorani, Michele P. L. Guarino, and Ricard Farré
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intestinal barrier function ,colonic epithelial permeability ,integrin-receptor antagonist ,inflammatory bowel disease ,transepithelial electrical resistance ,Ussing chambers ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
Vedolizumab (VDZ) is used for treating inflammatory bowel disease (IBD) patients. A study investigating colonic epithelial barrier function ex vivo following VDZ is lacking. This work aims to evaluate ex vivo the colonic epithelial barrier function in IBD patients at baseline and during VDZ treatment, and to investigate the relationships between barrier function and clinical parameters. Colonic specimens were obtained from 23 IBD patients before, and at 24 and 52 weeks after VDZ treatment, and from 26 healthy volunteers (HV). Transepithelial electrical resistance (TEER, permeability to ions) and paracellular permeability were measured in Ussing chambers. IBD patients showed increased epithelial permeability to ions (TEER, 13.80 ± 1.04 Ω × cm2 vs. HV 20.70 ± 1.52 Ω × cm2, p < 0.001) without changes in paracellular permeability of a 4 kDa probe. VDZ increased TEER (18.09 ± 1.44 Ω × cm2, p < 0.001) after 52 weeks. A clinical response was observed in 58% and 25% of patients at week 24, and in 62% and 50% at week 52, in ulcerative colitis and Crohn’s disease, respectively. Clinical and endoscopic scores were strongly associated with TEER. TEER < 14.65 Ω × cm2 predicted response to VDZ (OR 11; CI 2–59). VDZ reduces the increased permeability to ions observed in the colonic epithelium of IBD patients before treatment, in parallel to a clinical, histological (inflammatory infiltrate), and endoscopic improvement. A low TEER predicts clinical response to VDZ therapy.
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- 2024
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20. 1,2,3-Triazole Hybrids Containing Isatins and Phenolic Moieties: Regioselective Synthesis and Molecular Docking Studies
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Loredana Maiuolo, Matteo Antonio Tallarida, Angelo Meduri, Giulia Fiorani, Antonio Jiritano, Antonio De Nino, Vincenzo Algieri, and Paola Costanzo
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triazole hybrids ,isatin hybrids ,CuAAC ,Organic chemistry ,QD241-441 - Abstract
The synthesis of hybrid molecules is one of the current strategies of drug discovery for the development of new lead compounds. The 1,2,3-triazole moiety represents an important building block in Medicinal Chemistry, extensively present in recent years. In this paper, we presented the design and the synthesis of new 1,2,3-triazole hybrids, containing both an isatine and a phenolic core. Firstly, the non-commercial azide and the alkyne synthons were prepared by different isatines and phenolic acids, respectively. Then, the highly regioselective synthesis of 1,4-disubstituted triazoles was obtained in excellent yields by a click chemistry approach, catalyzed by Cu(I). Finally, a molecular docking study was performed on the hybrid library, finding four different therapeutic targets. Among them, the most promising results were obtained on 5-lipoxygenase, an enzyme involved in the inflammatory processes.
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- 2024
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21. Clozapine suppresses NADPH oxidase activation, counteracts cytosolic H2O2, and triggers early onset mitochondrial dysfunction during adipogenesis of human liposarcoma SW872 cells
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Giulia Blandino, Mara Fiorani, Barbara Canonico, Rita De Matteis, Andrea Guidarelli, Mariele Montanari, Gloria Buffi, Lucia Coppo, Elias S.J. Arnér, and Orazio Cantoni
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Adipocyte differentiation ,Clozapine ,NADPH oxidase ,Mitochondrial ROS ,Mitochondrial dysfunction ,Medicine (General) ,R5-920 ,Biology (General) ,QH301-705.5 - Abstract
Long-term treatment of schizophrenia with clozapine (CLZ), an atypical antipsychotic drug, is associated with an increased incidence of metabolic disorders mediated by poorly understood mechanisms. We herein report that CLZ, while slowing down the morphological changes and lipid accumulation occurring during SW872 cell adipogenesis, also causes an early (day 3) inhibition of the expression/nuclear translocation of CAAT/enhancer-binding protein β and peroxisome proliferator-activated receptor γ. Under the same conditions, CLZ blunts NADPH oxidase-derived reactive oxygen species (ROS) by a dual mechanism involving enzyme inhibition and ROS scavenging. These effects were accompanied by hampered activation of the nuclear factor (erythroid-derived2)-like 2 (Nrf2)-dependent antioxidant responses compared to controls, and by an aggravated formation of mitochondrial superoxide. CLZ failed to exert ROS scavenging activities in the mitochondrial compartment but appeared to actively scavenge cytosolic H2O2 derived from mitochondrial superoxide. The early formation of mitochondrial ROS promoted by CLZ was also associated with signs of mitochondrial dysfunction. Some of the above findings were recapitulated using mouse embryonic fibroblasts.We conclude that the NADPH oxidase inhibitory and cytosolic ROS scavenging activities of CLZ slow down SW872 cell adipogenesis and suppress their Nrf2 activation, an event apparently connected with increased mitochondrial ROS formation, which is associated with insulin resistance and metabolic syndrome. Thus, the cellular events characterised herein may help to shed light on the more detailed molecular mechanisms explaining some of the adverse metabolic effects of CLZ.
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- 2023
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22. Update on fecal microbiota transplantation
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M. Fiorani, S. Porcari, S. Bibbò, G. Cammarota, and G. Ianiro
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fecal microbiota transplantation ,gut microbiota ,clostridioides difficile infection ,inflammatory bowel disease ,irritable bowel syndrome ,diabetes ,metabolic syndrome. ,Diseases of the digestive system. Gastroenterology ,RC799-869 ,Medicine (General) ,R5-920 - Abstract
Fecal microbiota transplantation has gained growing scientific attention in numerous research areas, thanks to the increasing evidence supporting its effectiveness. In this review, we summarize the most relevant updates in the field of FMT published in the last year, covering various clinical areas, including Clostridioides difficile infection, inflammatory bowel disease, irritable bowel syndrome, diabetes, metabolic syndrome, and liver disease.
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- 2023
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23. From Antarctica to cancer research: a novel human DNA topoisomerase 1B inhibitor from Antarctic sponge Dendrilla antarctica
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Alessio Ottaviani, Joshua Welsch, Keli Agama, Yves Pommier, Alessandro Desideri, Bill J. Baker, and Paola Fiorani
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Natural product ,topoisomerase ,cancer ,drug development ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Nature has been always a great source of possible lead compounds to develop new drugs against several diseases. Here we report the identification of a natural compound, membranoid G, derived from the Antarctic sponge Dendrilla antarctica displaying an in vitro inhibitory activity against human DNA topoisomerase 1B. The experiments indicate that membranoid G, when pre-incubated with the enzyme, strongly and irreversibly inhibits the relaxation of supercoiled DNA. This compound completely inhibits the cleavage step of the enzyme catalytic mechanism by preventing protein binding to the DNA. Membranoid G displays also a cytotoxic effect on tumour cell lines, suggesting its use as a possible lead compound to develop new anticancer drugs.
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- 2022
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24. Application of Quantum Cascade Laser to Rapid Detection of Food Adulteration
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Luca Fiorani, Artuso, Florinda, Giardina, Isabella, Nuvoli, Marcello, and Pollastrone, Fabio
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- 2022
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25. The Boundary Between Volume and Surface-Driven Magnetic Properties in Spinel Iron Oxide Nanoparticles
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Giuseppe Muscas, Francesco Congiu, Giorgio Concas, Carla Cannas, Valentina Mameli, Nader Yaacoub, Rodaina Sayed Hassan, Dino Fiorani, Sawssen Slimani, and Davide Peddis
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Nanomagnetism ,Nanoparticles ,Ferrites ,Surface properties ,Exchange bias ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Abstract Despite modern preparation techniques offer the opportunity to tailor the composition, size, and shape of magnetic nanoparticles, understanding and hence controlling the magnetic properties of such entities remains a challenging task, due to the complex interplay between the volume-related properties and the phenomena occurring at the particle’s surface. The present work investigates spinel iron oxide nanoparticles as a model system to quantitatively analyze the crossover between the bulk and the surface-dominated magnetic regimes. The magnetic properties of ensembles of nanoparticles with an average size in the range of 5–13 nm are compared. The role of surface anisotropy and the effect of oleic acid, one of the most common and versatile organic coatings, are discussed. The structural and morphological properties are investigated by X-ray diffraction and transmission electron microscopy. The size dependence of the surface contribution to the effective particle anisotropy and the magnetic structure are analyzed by magnetization measurements and in-field Mössbauer spectrometry. The structural data combined with magnetometry and Mössbauer spectrometry analysis are used to shed light on this complex scenario revealing a crossover between volume and surface-driven properties in the range of 5–7 nm. Graphical Abstract
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- 2022
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26. Pitfalls and potential of high-throughput plant phenotyping platforms
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Hendrik Poorter, Grégoire M. Hummel, Kerstin A. Nagel, Fabio Fiorani, Philipp von Gillhaussen, Olivia Virnich, Ulrich Schurr, Johannes A. Postma, Rick van de Zedde, and Anika Wiese-Klinkenberg
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calibration curve ,digital biomass ,high-throughput plant phenotyping ,leaf mass per area ,sensors ,Plant culture ,SB1-1110 - Abstract
Automated high-throughput plant phenotyping (HTPP) enables non-invasive, fast and standardized evaluations of a large number of plants for size, development, and certain physiological variables. Many research groups recognize the potential of HTPP and have made significant investments in HTPP infrastructure, or are considering doing so. To make optimal use of limited resources, it is important to plan and use these facilities prudently and to interpret the results carefully. Here we present a number of points that users should consider before purchasing, building or utilizing such equipment. They relate to (1) the financial and time investment for acquisition, operation, and maintenance, (2) the constraints associated with such machines in terms of flexibility and growth conditions, (3) the pros and cons of frequent non-destructive measurements, (4) the level of information provided by proxy traits, and (5) the utilization of calibration curves. Using data from an Arabidopsis experiment, we demonstrate how diurnal changes in leaf angle can impact plant size estimates from top-view cameras, causing deviations of more than 20% over the day. Growth analysis data from another rosette species showed that there was a curvilinear relationship between total and projected leaf area. Neglecting this curvilinearity resulted in linear calibration curves that, although having a high r2 (> 0.92), also exhibited large relative errors. Another important consideration we discussed is the frequency at which calibration curves need to be generated and whether different treatments, seasons, or genotypes require distinct calibration curves. In conclusion, HTPP systems have become a valuable addition to the toolbox of plant biologists, provided that these systems are tailored to the research questions of interest, and users are aware of both the possible pitfalls and potential involved.
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- 2023
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27. Doubled Haploid Lines Derived from a European Maize Flint Landrace Contrast in Recovery from Cold Stress
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Khadija Boughazi, Nathalie Wuyts, Onno Muller, Carel W. Windt, Kerstin A. Nagel, Uwe Rascher, and Fabio Fiorani
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doubled haploid maize ,low-temperature stress ,low-temperature recovery ,plant acclimation ,cold survival ,Agriculture - Abstract
Suboptimal temperatures at sowing and emergence affect the early development of maize, with potentially irreversible effects later in the growing season. We studied recovery from cold stress of an inbred line (B73) and 13 Doubled Haploid lines derived from a European flint maize landrace. After a cold treatment (20–12 °C, day–night) from sowing to seedling establishment, seedlings were transplanted and grown in the greenhouse until the V8 stage (eight leaves fully developed), when we measured agronomically relevant plant traits and spectral indices of mature leaves. Survival rates of transplanted seedlings after cold treatment ranged from 10% to 100%. After a strong delay in early development due to cold, the surviving plants were able to compensate for this delay at later stages of recovery. They reached the V8 stage after only five more growing degree days than plants grown under the control treatment (25–18 °C, day–night). Plants from the most cold-tolerant genotypes (PE0401 and PE0100) accumulated more root and shoot biomass at the end of the recovery phase compared with the same genotypes exposed to the control treatment. The genotypes with the most plastic leaf morphological traits (PE0161 and PE0072) had little reduction in leaf biomass at the end of the recovery phase in comparison with less responsive genotypes such as PE0171. We conclude that genotypes that survived cold treatment with minimal cold damage of seedling leaves can be candidates for further cold recovery studies and breeding. Nevertheless, such studies must take trait acclimation for other suboptimal conditions into consideration.
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- 2024
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28. Sphingomyelin Metabolism Modifies Luminal A Breast Cancer Cell Line under a High Dose of Vitamin C
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Michela Codini, Federico Fiorani, Martina Mandarano, Samuela Cataldi, Cataldo Arcuri, Alessandra Mirarchi, Maria Rachele Ceccarini, Tommaso Beccari, Toshihide Kobayashi, Nario Tomishige, Angelo Sidoni, and Elisabetta Albi
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vitamin C ,breast cancer ,MCF7 cells ,MB-231 cells ,estrogen receptor ,progesterone receptor ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
The role of sphingomyelin metabolism and vitamin C in cancer has been widely described with conflicting results ranging from a total absence of effect to possible preventive and/or protective effects. The aim of this study was to establish the possible involvement of sphingomyelin metabolism in the changes induced by vitamin C in breast cancer cells. The MCF7 cell line reproducing luminal A breast cancer and the MDA-MB-231 cell line reproducing triple-negative breast cancer were used. Cell phenotype was tested by estrogen receptor, progesterone receptor, human epidermal growth factor receptor 2 expression, and proliferation index percentage. Sphingomyelin was localized by an EGFP-NT-Lys fluorescent probe. Sphingomyelin metabolism was analyzed by RT-PCR, Western blotting and UFLC-MS/MS. The results showed that a high dose of vitamin C produced reduced cell viability, modulated cell cycle related genes, and changed the cell phenotype with estrogen receptor downregulation in MCF7 cell. In these cells, the catabolism of sphingomyelin was promoted with a large increase in ceramide content. No changes in viability and molecular expression were observed in MB231 cells. In conclusion, a high dose of vitamin C induces changes in the luminal A cell line involving sphingomyelin metabolism.
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- 2023
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29. Spatial Analysis of Risk Exposure of Urban Trees: A Case Study from Bologna (Italy)
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Laura Caggiu, Federico Fiorani, Elisa Corradini, Enrico Felice, and Alberto Minelli
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open data ,risk exposure ,spatial analysis ,tree failure ,urban green infrastructure ,urban planning ,Geography. Anthropology. Recreation ,Social Sciences - Abstract
In Europe, more than two-thirds of the population live in urban areas. The management of urban green areas and trees is becoming increasingly relevant involving different players and stakeholders, as well for keeping a focus on the Sustainable Development Goals. Society and policy makers are often unaware of the disservices that neglecting these areas can cause. Appropriate monitoring interventions can protect both citizens and trees themselves. The aim of the study was to assess the risk potential in urban trees in Bologna suburbs (Italy). For each tree in the city of Bologna, three target variables identifying the number and categories of streets, buildings, and walking and cycle paths near the tree were considered and used as covariates. A multiple regression model assessing the relationship between a dependent synthetic spatial variable (digital number, DN), proxy of the likelihood of tree failure, and the three independent covariates was estimated. Both the number of streets and walking and cycle paths in the area surrounding a tree are shown to be significantly associated with the DN value. The use of open data can assist in monitoring and maintaining urban green areas. The tool supports a virtuous circle between stakeholders in urban systems through sustainability and efficiency.
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- 2023
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30. Rapid Non-Contact Detection of Chemical Warfare Agents by Laser Photoacoustic Spectroscopy
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Luca Fiorani, Claudio Ciceroni, Isabella Giardina, and Fabio Pollastrone
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chemical ,biological ,radiological ,nuclear ,and explosive (CBRNe) threats ,chemical warfare agents ,Chemical technology ,TP1-1185 - Abstract
Nerve agents have recently been used in battlefield operations, espionage wars, and terrorist attacks. These compounds, like some pesticides, cause organophosphate poisoning. The rapid, noncontact detection of a sarin simulant in the liquid phase has been demonstrated at the Diagnostics and Metrology Laboratory of the Italian National Agency for New Technologies, Energy and Sustainable Economic Development using laser photoacoustic spectroscopy, an infrared absorption technology. The first measurements, carried out with an experimental system based on a quantum cascade laser and developed for the assessment of food authenticity in the “fingerprint region”, show that a detection limit of one nanolitre is within the reach of the instrument when chemometric analysis is applied.
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- 2023
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31. Survey on the effectiveness of telephone-based communication with relatives of hospitalized cancer patients in COVID-19 era in Italy
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Riccò, Beatrice, Fiorani, Claudia, Ferrara, Leonardo, Potenza, Leonardo, Saviola, Alessia, Malavasi, Norma, Acquaviva, Gloria, Carboni, Chiara, Scarabelli, Laura, Dominici, Massimo, Luppi, Mario, and Longo, Giuseppe
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- 2022
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32. Sustainable Strategic Planning in Italian Higher Education Institutions: A Content Analysis
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Fantauzzi, Chiara, Colasanti, Nathalie, Fiorani, Gloria, and Frondizi, Rocco
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Purpose: This study aims, first of all, to analyze the extent to which Italian higher education institutions declare their mission statements in their official documents; then, to examine their content; and finally, to investigate whether mission statements include considerations on sustainability dimensions. Design/methodology/approach: After a theoretical background on the new strategic approach adopted by higher education institutions and the related disclosure of their mission statements, the study deepens their sustainable perspective presenting the concepts of social engagement and knowledge transfer from a literary point of view. Then, a documentary analysis on the content of Italian universities' official mission declarations will be conducted, to understand the role they play in society, by individuating their actual interest in sustainable dimensions. Findings: Findings suggest that 36% of the 98 Italian universities state their engagement in societal issues, but only 3 of them mention sustainability targets in their mission declarations. Research limitations/implications: The study is limited, exclusively based on what higher education institutions share and, in terms of future perspective, the aim can be to investigate further official documents, especially for what concerns sustainability reports. Practical implications: Practical implications regard the denounce of weak attention paid by Italian universities to sustainability, with the aim to foster them to increase connections with the external world, aware of the centrality of their role within society. Originality/value: In a context that is not yet completely investigated, the originality of the paper regards the intent to study the sustainable propensity that characterizes the Italian higher education system.
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- 2021
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33. The quality of palliative sedation in end-stage disease: audit from a department of oncology and haematology
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Alessia, Saviola, Matilde, Schipilliti Francesca, Chrystel, Isca, Massimiliano, Salati, Daniele, Dini, Claudia, Fiorani, Raffaella, Postiglione, Flavia, Cantile, Leonardo, Ferrara, Chiara, Carboni, Leonardo, Potenza, Massimo, Dominici, Mario, Luppi, and Giuseppe, Longo
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- 2022
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34. The Boundary Between Volume and Surface-Driven Magnetic Properties in Spinel Iron Oxide Nanoparticles
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Muscas, Giuseppe, Congiu, Francesco, Concas, Giorgio, Cannas, Carla, Mameli, Valentina, Yaacoub, Nader, Hassan, Rodaina Sayed, Fiorani, Dino, Slimani, Sawssen, and Peddis, Davide
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- 2022
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35. Seroepidemiological Survey of Chronic Chagas Disease in a Rural Community in Southern Bahia, Brazil, Using Recombinant Chimeric Antigens
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Neci Matos Soares, Nilo Manoel Pereira Vieira Barreto, Marina Morena Brito Farias, Cíntia de Lima Oliveira, Weslei Almeida Costa Araújo, Joelma Nascimento de Souza, Márcia Cristina Aquino Teixeira, Noilson Lázaro Sousa Gonçalves, Daniel Dias Sampaio, Tycha Bianca Sabaini Pavan, Paola Alejandra Fiorani Celedon, Nilson Ivo Tonin Zanchin, and Fred Luciano Neves Santos
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chronic chagas disease ,screening ,serologic diagnosis ,prevalence ,seroepidemiology ,active case finding ,Medicine - Abstract
Chagas disease (CD), caused by the parasite Trypanosoma cruzi, is a neglected tropical disease with life-threatening implications. In this study, we conducted a seroepidemiological survey to determine the prevalence and clinical profiles of CD in 217 individuals from an impoverished rural community in Southern Bahia, Brazil. The overall prevalence of CD in the studied community was 0.92%, detected through latent class analysis (LCA). Two individuals tested positive for anti-T. cruzi IgG, both being male farmers. One case was a 22-year-old man born in Camamu, with no evidence of congenital transmission, suggesting other routes of transmission such as vector-borne transmission due to migratory activities. The other case was a 69-year-old man born in São Felipe, who had lived in an adobe/brick house and had a pacemaker due to cardiac involvement caused by CD. The prevalence in this community was lower than expected, given the socioeconomic conditions and environmental factors that contribute to T. cruzi transmission. This could be attributed to the implementation of preventive measures and vector control programs by the Brazilian Government. However, continuous monitoring and surveillance are essential to sustain control efforts and detect any potential re-emergence of the disease. While the overall prevalence was low, the detection of positive cases underscores the need for continued surveillance and control measures in vulnerable populations, such as rural communities. Active surveillance, early diagnosis, and timely treatment are crucial in preventing disease progression and complications, thereby enhancing the effectiveness of screening and treatment programs.
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- 2023
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36. An Inter-Laboratory Comparative Study on the Influence of Reagents to Perform the Identification of the Xylella fastidiosa Subspecies Using Tetraplex Real Time PCR
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Nicoletta Pucci, Valeria Scala, Erica Cesari, Valeria Crosara, Riccardo Fiorani, Alessia L’Aurora, Simone Lucchesi, Giuseppe Tatulli, Eleonora Barra, Serena Ciarroni, Francesca De Amicis, Salvatore Fascella, Francesca Giacobbi, Francesca Gaffuri, Valeria Gualandri, Lucia Landi, Giuliana Loconsole, Giulia Molinatto, Stefania Pollastro, Maria Luisa Raimondo, Domenico Rizzo, Chiara Roggia, Maria Rosaria Silletti, Simona Talevi, Marco Testa, and Stefania Loreti
- Subjects
test performance study (TPS) ,intra-laboratory study (ITS) ,Xylella fastidiosa subspecies ,tetraplex real-time PCR ,critical reagent ,performance criteria ,Plant culture ,SB1-1110 - Abstract
In 2022, a test performance study (TPS) assessing the influence of different master mixes on the performance of the tetraplex real-time PCR (TqPCR) assay was organized. TqPCR allows for the specific detection and identification of Xylella fastidiosa (Xf) subspecies in a single reaction. Eighteen official laboratories of the Italian National Plant Protection Organization received a panel of 12 blind samples, controls, primers, probes, and different master mixes to participate in the TPS. Furthermore, the Research Centre for Plant Protection and Certification of the Council for Agricultural Research and Economics performed an intra-laboratory study (ITS) on spiked plant matrices to evaluate the analytical sensitivity of TqPCR employing the selected master mixes with the best performance. Naturally infected samples were analyzed for subspecies identification via TqPCR compared with the official multilocus-sequence-typing (MLST) method. The best results in this comparative study were obtained using Fast Universal PCR Master Mix (Applied Biosystems) and Brilliant multiplex QPCR Master Mix (Agilent), and they confirmed that the TqPCR test is reliable, offering the advantage of identifying this subspecies at the same time, thus saving time and resources. The TqPCR assay is suggested among the tests to be used by laboratories performing the official diagnosis of Xf to support the activities of official monitoring.
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- 2023
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37. Conservazione e Ricostruzione: la difficile ricerca di equilibrio nella salvaguardia del Patrimonio Mondiale
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Donatella Fiorani
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Reconstruction ,Theory of conservation ,Restoration Charters ,UNESCO ,Recovery ,Architecture ,NA1-9428 ,Archaeology ,CC1-960 - Abstract
There is a sort of taboo surrounding the topic of reconstruction, at least in Italy. The reasons for the phenomenon are rather easy to explain: as the National Restoration Charters and, in general, the theoretical principles developed in the peninsula have well demonstrated, conservation can only be practiced when the authentic matter of architecture is present, as any reference to restoration will appear arbitrary and unfounded without this. Nevertheless, as the international scenario has expanded and the concept of heritage has taken on a variety of geo-graphical meanings, reconstruction has become increasingly popular. On the one hand, this has been linked to the different conceptions of authenticity that are prevalent especially in non-European contexts, and on the other hand, concerns the need to meet the needs of the population, especially following calamities such as wars and natural disasters. It is intended here to stimulate the development of a specific reflection on the phenomenon of reconstruction by analysing the scenarios related to the phenomenon, so as to respond to UNESCO's increasing need to make decisions on reconstruction on the base of useful theoretical support.
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- 2023
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38. The role of feedback projections in feature tuning and neuronal excitability in the early primate visual system
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Correia, A. R. A., Amorim, A. K. J., Soares, J. G. M., Lima, B., Fiorani, M., and Gattass, R.
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- 2021
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39. Western blot using Trypanosoma cruzi chimeric recombinant proteins for the serodiagnosis of chronic Chagas disease: A proof-of-concept study.
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Ramona Tavares Daltro, Emily Ferreira Santos, Ângelo Antônio Oliveira Silva, Natália Erdens Maron Freitas, Leonardo Maia Leony, Larissa Carvalho Medrado Vasconcelos, Alejandro Ostermayer Luquetti, Paola Alejandra Fiorani Celedon, Nilson Ivo Tonin Zanchin, Carlos Gustavo Regis-Silva, and Fred Luciano Neves Santos
- Subjects
Arctic medicine. Tropical medicine ,RC955-962 ,Public aspects of medicine ,RA1-1270 - Abstract
BackgroundChagas disease (CD) is caused by Trypanosoma cruzi. The chronic phase of CD is characterized by the presence of IgG anti-T. cruzi antibodies; and diagnosis is performed by serological methods. Because there is no reliable test that can be used as a reference test, WHO recommends the parallel use of two different tests for CD serodiagnosis. If results are inconclusive, samples should be subjected to a confirmatory test, e.g., Western blot (WB) or PCR. PCR offers low sensitivity in the chronic phase, whereas few confirmatory tests based on the WB method are commercially available worldwide. Therefore, new diagnostic tools should be evaluated to fill the gap in CD confirmatory tests. In recent years, four chimeric recombinant antigens (IBMP-8.1, IBMP-8.2, IBMP-8.3 and IBMP-8.4) have been evaluated in phase I, II and III studies using ELISA, liquid microarray and immunochromatography with 95-100% accuracy. Given the high diagnostic performance of these antigens, the present study investigated the ability of these molecules to diagnose chronic CD using a WB testing platform.Methodology/principal findingsIn this study, we analyzed the diagnostic potential of four chimeric antigens using 40 T. cruzi-positive, 24-negative, and three additional positive samples for visceral leishmaniasis (i.e., potentially cross-reactive) using WB as the diagnostic platform. Checkerboard titration with different dilutions of antigens, conjugated antigens, and serum samples was performed to standardize all assays. All IBMP antigens achieved 100% sensitivity, specificity, and accuracy, with the exception of IBMP-8.3, which had 100% specificity despite lack of significance, but lower sensitivity (95%) and accuracy (96.9%). No cross-reactivity was observed in samples positive for leishmaniasis.Conclusions/significanceThe present phase I (proof-of-concept) study demonstrated the high diagnostic potential of these four IBMP antigens to discriminate between T. cruzi-positive and -negative samples, making them candidates for phase II and confirmatory testing with WB.
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- 2022
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40. Educational interventions to improve detection and management of cognitive decline in primary care—An Italian multicenter pragmatic study
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Gemma Lombardi, Elena Chipi, Domenico Arenella, Ambra Fiorani, Giovanni Battista Frisoni, Simona Linarello, Chiara Montanucci, Cristina Muscio, Irene Pacifico, Silvia Pelizzari, Daniela Perani, Fabrizio Piras, Luca Rozzini, Sandro Sorbi, Gianfranco Spalletta, Fabrizio Tagliavini, Pietro Tiraboschi, Lucilla Parnetti, and Graziella Filippini
- Subjects
cognitive decline ,dementia ,primary care ,educational intervention ,care pathway ,family physician ,Psychiatry ,RC435-571 - Abstract
IntroductionTimely detection of cognitive decline in primary care is essential to promote an appropriate care pathway and enhance the benefits of interventions. We present the results of a study aimed to evaluate the effectiveness of an educational intervention addressed to Italian family physicians (FPs) to improve timely detection and management of cognitive decline.Materials and methodsWe conducted a pre-post study in six Italian health authorities (HAs) involving 254 FPs and 3,736 patients. We measured process and outcome indicators before the intervention (1 January 2014 to 31 December 2016) and after the intervention (1 January 2018 to 31 December 2019). One interactive face-to-face session workshop was delivered by local cognitive disorders and dementia specialists and FP advisors at each HA, in the period September 2017–December 2017. The session focused on key messages of the local Diagnostic and Therapeutic Care Pathway (DTCP) or regional guidelines: (a) the role of the FP for a timely suspicion of cognitive decline is fundamental; (b) when cognitive decline is suspected, the role of the FP is active in the diagnostic work-up; (c) FP’s knowledge on pharmacological and non-pharmacological interventions is essential to improve the management of patients with cognitive decline.ResultsAn overall improvement in diagnostic procedures and management of patients with cognitive decline by FPs after the intervention was observed. The number of visits per year performed by FPs increased, and the time interval between the first FP consultation and the diagnosis was optimized. Neuroleptic use significantly decreased, whereas the use of benzodiazepines remained steadily high. Non-pharmacological interventions, or use of support services, were underrepresented even in the post-intervention. Differences among the participating HAs were identified and discussed.DiscussionResults from this study suggest the success of the educational intervention addressed to FPs in improving early detection and management of cognitive decline, highlighting the importance to continue medical education in this field. At the same time, further initiatives of care pathway dissemination and implementation should promote strategies to enhance interactions between primary and secondary care optimizing the collaboration between FPs and specialists.
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- 2022
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41. Unweaving the mitotic spindle: A focus on Aurora kinase inhibitors in lung cancer
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Alessio Stefani, Geny Piro, Francesco Schietroma, Alessandro Strusi, Emanuele Vita, Simone Fiorani, Diletta Barone, Federico Monaca, Ileana Sparagna, Giustina Valente, Miriam Grazia Ferrara, Ettore D’Argento, Mariantonietta Di Salvatore, Carmine Carbone, Giampaolo Tortora, and Emilio Bria
- Subjects
lung ,cancer ,oncology ,Aurora kinase (AURK) ,mitosis ,AURK inhibitors ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Lung cancer is one of the most aggressive malignancies, classified into two major histological subtypes: non-small cell lung cancer (NSCLC), that accounts for about 85% of new diagnosis, and small cell lung cancer (SCLC), the other 15%. In the case of NSCLC, comprehensive genome sequencing has allowed the identification of an increasing number of actionable targets, which have become the cornerstone of treatment in the advanced setting. On the other hand, the concept of oncogene-addiction is lacking in SCLC, and the only innovation of the last 30 years has been the introduction of immune checkpoint inhibitors in extensive stage disease. Dysregulation of cell cycle is a fundamental step in carcinogenesis, and Aurora kinases (AURKs) are a family of serine/threonine kinases that play a crucial role in the correct advance through the steps of the cycle. Hyperexpression of Aurora kinases is a common protumorigenic pathway in many cancer types, including NSCLC and SCLC; in addition, different mechanisms of resistance to anticancer drugs rely on AURK expression. Hence, small molecule inhibitors of AURKs have been developed in recent years and tested in several malignancies, with different results. The aim of this review is to analyze the current evidences of AURK inhibition in lung cancer, starting from preclinical rationale to finish with clinical trials available up to now.
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- 2022
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42. E.L., a modern-day Phineas Gage: Revisiting frontal lobe injury
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Pedro H.M. de Freitas, Ruy C. Monteiro, Raphael M. Bertani, Caio M. Perret, Pedro C. Rodrigues, Joana Vicentini, Tagore M. Gonzalez de Morais, Stefano F.A. Rozental, Gustavo F. Galvão, Fabricio de Mattos, Fernando A. Vasconcelos, Ivan S. Dorio, Cintya Y. Hayashi, Jorge R.L. dos Santos, Guilherme L. Werneck, Carla T. Ferreira Tocquer, Claudia Capitão, Luiz C. Hygino da Cruz, Jr, Jaan Tulviste, Mario Fiorani, Marcos M. da Silva, Wellingson S. Paiva, Kenneth Podell, Howard J. Federoff, Divyen H. Patel, Fred Lado, Elkhonon Goldberg, Rodolfo Llinás, Michael V.L. Bennett, and Renato Rozental
- Subjects
Traumatic brain injury (TBI) ,Phineas Gage ,Prefrontal cortex (PFC) ,Corpus callosum (C.C.) ,Magnetic Resonance Imaging (MRI) ,Neuropsychological tests ,Public aspects of medicine ,RA1-1270 - Abstract
Summary: Background: How the prefrontal cortex (PFC) recovers its functionality following lesions remains a conundrum. Recent work has uncovered the importance of transient low-frequency oscillatory activity (LFO; < 4 Hz) for the recovery of an injured brain. We aimed to determine whether persistent cortical oscillatory dynamics contribute to brain capability to support ‘normal life’ following injury. Methods: In this 9-year prospective longitudinal study (08/2012-2021), we collected data from the patient E.L., a modern-day Phineas Gage, who suffered from lesions, impacting 11% of his total brain mass, to his right PFC and supplementary motor area after his skull was transfixed by an iron rod. A systematic evaluation of clinical, electrophysiologic, brain imaging, neuropsychological and behavioural testing were used to clarify the clinical significance of relationship between LFO discharge and executive dysfunctions and compare E.L.´s disorders to that attributed to Gage (1848), a landmark in the history of neurology and neuroscience. Findings: Selective recruitment of the non-injured left hemisphere during execution of unimanual right-hand movements resulted in the emergence of robust LFO, an EEG-detected marker for disconnection of brain areas, in the damaged right hemisphere. In contrast, recruitment of the damaged right hemisphere during contralateral hand movement, resulted in the co-activation of the left hemisphere and decreased right hemisphere LFO to levels of controls enabling performance, suggesting a target for neuromodulation. Similarly, transcranial magnetic stimulation (TMS), used to create a temporary virtual-lesion over E.L.’s healthy hemisphere, disrupted the modulation of contralateral LFO, disturbing behaviour and impairing executive function tasks. In contrast to Gage, reasoning, planning, working memory, social, sexual and family behaviours eluded clinical inspection by decreasing LFO in the delta frequency range during motor and executive functioning. Interpretation: Our study suggests that modulation of LFO dynamics is an important mechanism by which PFC accommodates neurological injuries, supporting the reports of Gage´s recovery, and represents an attractive target for therapeutic interventions. Funding: Fundação de Amparo Pesquisa Rio de Janeiro (FAPERJ), Universidade Federal do Rio de Janeiro (intramural), and Fiocruz/Ministery of Health (INOVA Fiocruz).
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- 2022
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43. Characterization of Bioactive Phenolic Compounds in Seeds of Chilean Quinoa (Chenopodium quinoa Willd.) Germplasm
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Archis Pandya, Björn Thiele, Stephan Köppchen, Andres Zurita-Silva, Björn Usadel, and Fabio Fiorani
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quinoa ,free and bound phenolic compounds ,HPLC-DAD-MS/MS ,Agriculture - Abstract
In recent years, quinoa (Chenopodium quinoa Willd.), an ancient Andean region crop, has received increased research attention because it is an excellent source of nutrients and also of bioactive phenolic compounds, which are potentially beneficial for human health. However, variation in the content and type of these metabolites in quinoa genetic resources remains, to a large extent, unexplored. We evaluated the composition of free and bound phenolic forms in the seeds of 111 Chilean quinoa accessions by using LC-DAD-MS/MS. The relative phenolic content ranged from 35.51 mg/100 g to 93.23 mg/100 g of seed dry weight. The free phenolic fraction accounted for 72% of the total phenolic content, while the bound fraction represented the remaining 28% of the total phenolic content. Our study also revealed a significant degree of variation in terms of individual phenolic compounds such as rutin, vanillic acid, quercetin, and their derivatives, which can have important implications for quinoa’s nutritional and functional properties. We conclude that our data reveal a significant phenotypic variation of bioactive phenolic content in the examined germplasm, which could be exploited in current and future genetic improvement programs in quinoa.
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- 2023
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44. Laser Sensing and Chemometric Analysis for Rapid Detection of Oregano Fraud
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Luca Fiorani, Antonia Lai, Adriana Puiu, Florinda Artuso, Claudio Ciceroni, Isabella Giardina, and Fabio Pollastrone
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quantum cascade laser application ,laser spectroscopy ,photoacoustic technique ,multivariate calibration ,agrofood chain ,food fraud ,Chemical technology ,TP1-1185 - Abstract
World health is increasingly threatened by the growing number of spice-related food hazards. Further development of reliable methods for rapid, non-targeted identification of counterfeit ingredients within the supply chain is needed. ENEA has developed a portable, user-friendly photoacoustic laser system for food fraud detection, based on a quantum cascade laser and multivariate calibration. Following a study on the authenticity of saffron, the instrument was challenged with a more elusive adulterant, olive leaves in oregano. The results show that the reported method of laser sensing and chemometric analysis was able to detect adulterants at mass ratios of at least 20% in less than five minutes.
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- 2023
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45. The Impact of Inherited Retinal Diseases in the United States of America (US) and Canada from a Cost-of-Illness Perspective
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Gong J, Cheung S, Fasso-Opie A, Galvin O, Moniz LS, Earle D, Durham T, Menzo J, Li N, Duffy S, Dolgin J, Shearman MS, Fiorani C, Banhazi J, and Daly A
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genetic diagnosis ,inherited retinal disease ,cost-of-illness ,Ophthalmology ,RE1-994 - Abstract
Jennifer Gong,1 Simone Cheung,2 Alivia Fasso-Opie,3 Orla Galvin,4 Larissa S Moniz,5 Doug Earle,5 Todd Durham,6 Jason Menzo,6 Nan Li,7 Stephanie Duffy,7 Jill Dolgin,8 Mark S Shearman,8 Chiara Fiorani,9 Judit Banhazi,9 Avril Daly4 1Health Economics and Social Policy, Deloitte Access Economics, Melbourne, Victoria, Australia; 2Health Economics and Social Policy, Deloitte Access Economics, Sydney, New South Wales, Australia; 3Health Economics and Social Policy, Deloitte Access Economics, Canberra, Australian Capital Territory, Australia; 4Retina International, Dublin, D08 R9CN, Ireland; 5Fighting Blindness Canada, Toronto, Ontario, Canada; 6The Foundation Fighting Blindness, Raleigh, North Carolina, USA; 7The Janssen Pharmaceutical Companies of Johnson and Johnson, Raritan, New Jersey, USA; 8Applied Genetic Technologies Corporation, Cambridge, Massachusetts, USA; 9Novartis Pharma AG, Basel, SwitzerlandCorrespondence: Avril Daly Email avril.daly@retina-international.orgObjective: To estimate the annual cost of inherited retinal diseases (IRDs) in the United States of America (US) and Canada from a societal perspective – including costs to the health system, individual and family productivity costs, lost wellbeing and other societal economic costs – by setting and payer. Findings will inform the need for policy action to mitigate the impact of IRDs.Methods: The costs of IRDs were estimated using a cost-of-illness methodology, based on the prevalence of IRDs in each country. Intangible costs of reduced wellbeing were also estimated using disability-adjusted life years which were then converted to monetary values using the value of a statistical life.Results: Using base prevalence rates, total costs attributable to IRDs in the US were estimated to range between US$13,414.0 and US$31,797.4 million in 2019, comprising both economic costs (between US$4,982 and US$11,753.9 million; 37% of total costs) and wellbeing costs (between US$8,431.7 and US$20,043.6 million; 63%). Total costs attributable to IRDs in Canada were estimated to range between CAN$1637.8 and CAN$6687.5 million in 2019, comprising both economic costs (between CAN$566.6 and CAN$2,305.7 million; 34%) and wellbeing costs (between CAN$1,071.4 and CAN$4,381.9 million; 66% of total costs).Conclusion: The impact of IRDs in the US and Canada is substantial when considering both economic costs and reduced wellbeing. The wellbeing costs due to IRDs in the US and Canada are considerable, accounting for over 60% of total costs. Vision loss from IRDs often manifests in childhood, meaning some people live with vision impairment and blindness for their whole lives. Further research into current and emerging cost-effective therapies and interventions is required given the substantial economic burden faced by those living with vision loss.Keywords: genetic diagnosis, inherited retinal disease, cost-of-illness
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- 2021
46. A Sustainable Improvement of ω-Bromoalkylphosphonates Synthesis to Access Novel KuQuinones
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Mattia Forchetta, Valeria Conte, Giulia Fiorani, Pierluca Galloni, and Federica Sabuzi
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ω-bromoalkylphosphonates ,KuQuinones ,phosphonate esters ,diethyl phosphonates ,organic phosphonic acids ,Arbuzov reaction ,Organic chemistry ,QD241-441 - Abstract
Owing to the attractiveness of organic phosphonic acids and esters in the pharmacological field and in the functionalization of conductive metal-oxides, the research of effective synthetic protocols is pivotal. Among the others, ω-bromoalkylphosphonates are gaining particular attention because they are useful building blocks for the tailored functionalization of complex organic molecules. Hence, in this work, the optimization of Michaelis–Arbuzov reaction conditions for ω-bromoalkylphosphonates has been performed, to improve process sustainability while maintaining good yields. Synthesized ω-bromoalkylphosphonates have been successfully adopted for the synthesis of new KuQuinone phosphonate esters and, by hydrolysis, phosphonic acid KuQuinone derivatives have been obtained for the first time. Considering the high affinity with metal-oxides, KuQuinones bearing phosphonic acid terminal groups are promising candidates for biomedical and photo(electro)chemical applications.
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- 2021
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47. Spatial–temporal trends and economic losses associated with bovine abortifacients in central Argentina
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Cantón, Germán J., Moreno, Fabiana, Fiorentino, María A., Hecker, Yanina P., Spetter, Maximiliano, Fiorani, Franco, Monterubbianesi, María G., García, Juan A., Altamiranda, Erika González, Cirone, Karina M., Louge Uriarte, Enrique L., Verna, Andrea E., Marin, Maia, Cheuquepán, Felipe, Malena, Rosana, Morsella, Claudia, Paolicchi, Fernando A., Morrell, Eleonora L., and Moore, Dadin P.
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- 2022
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48. Daytime sleepiness in elementary school students: the role of sleep quality and chronotype
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Tâmile Stella Anacleto, João Guilherme Fiorani Borgio, and Fernando Mazzilli Louzada
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Adolescent ,Sleep ,Circadian Rhythm ,Quality of Life ,Activities of Daily Living ,Education ,Public aspects of medicine ,RA1-1270 - Abstract
ABSTRACT OBJECTIVE To investigate the occurrence of daytime sleepiness and associated sleep factors in a sample of elementary school students who attended school in the afternoon schedule. METHODS Sleep data from 363 Brazilian public school students (12.78 ± 1.36 years, 206 girls) were obtained by applying questionnaires in classrooms. All subjects attended school in the afternoon schedule, with classes starting between 1:00 and 1:20 p.m. Daytime sleepiness was assessed by the pediatric daytime sleepiness scale; sleep quality, by the mini-sleep questionnaire; and sleep patterns and chronotypes, by the Munich chronotype questionnaire. Scores equal to or greater than 15 pediatric daytime sleepiness scale points were considered as excessive daytime sleepiness. The predictive power of sleep variables on daytime sleepiness was evaluated by a multiple linear regression. RESULTS The subjects in the sample had an average time in bed greater than nine hours both on school days and on weekends. Nevertheless, 52.1% had an average pediatric daytime sleepiness scale score equal to or greater than 15 points, indicative of excessive daytime sleepiness. As for their quality of sleep, 41.1% had a very altered sleep. We observed, by a multiple linear regression, that quality of sleep (β = 0.417), chronotype (β = 0.174), mid-sleep on school days (β = 0.138), and time in bed (β = - 0.091) were all significant in predicting daytime sleepiness. CONCLUSION This study showed the occurrence of excessive daytime sleepiness in non-sleep deprived students who attended school in the afternoon. The worst quality of sleep and eveningness had a greater predictive power on daytime sleepiness than time in bed. Therefore, we must consider other factors in addition to sleep duration when planning interventions for daytime sleepiness.
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- 2022
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49. Psychopathological and temperamental features of Late Onset versus Early Onset Bipolar Disorder
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L. Orsolini, L. Ferretti, M. Fiorani, D. Rocchetti, V. Salvi, and U. Volpe
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LOBD ,EOBD ,bipolar disorder ,temperament ,Psychiatry ,RC435-571 - Abstract
Introduction Age at onset of type-I bipolar disorder (BD-I) typically averages 12-24 years, is older among patients with type-II-BD (BD-II), even though generally before 50-years-old (EOBD). Clinical observation of late-onset BD (LOBD) posed some questions regarding a differential phenotypic/psychopathological manifestations and affective temperaments between LOBD vs EOBD. Objectives A case-control pilot-study was carried out to investigate psychopathological, clinical and temperamental features of a psychogeriatric cohort of LOBD and EOBD subjects. Methods Out of 74 enrolled patients, 64 patients (31 EOBD, 33 LOBD) were included and administered an ad hoc socio-demographic datasheet, BPRS, CGI, GAF, HAM-D, GDS, MSRS, MRS, MOCA and TEMPS-M. Results LOBD is significantly associated with higher rates of BD-II diagnosis (X2 = 26.1, p
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- 2022
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50. Pathoplastic effects of metabolic disorders in severe mental illness
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M. Fiorani, L. Orsolini, U. Volpe, and V. Salvi
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severe mental illness ,metabolic syndrome ,Insuline resistance ,Pathoplastic effect ,Psychiatry ,RC435-571 - Abstract
Introduction Patients with severe mental illness (SMI) have a higher risk of weight gain, dyslipidemia and insulin-resistance. It was observed that insulin resistance has a pathoplastic effect: in Schizophrenia it was associated with a greater severity of negative symptoms, whereas in Bipolar Disorder it was associated with more chronicity and rapid cycling. Moreover a correlation was observed between obesity and a worse outcome in Bipolar Disorder type I. Objectives We aimed at assessing the influence of dysmetabolisms on clinical characteristics in patients with SMI. Methods We recruited 78 patients with SMI consecutively hospitalized in the Psychiatry Clinic of the Ospedali Riuniti of Ancona, Italy. We administered a checklist for socio-demographic and clinical features (diagnosis, age of onset, illness duration, number of episodes, number of episodes per year, suicidal attempts and comorbidities), and evaluated the following metabolic parameters: weight, height, BMI, abdominal circumference, blood pressure, total cholesterol, HDL, triglycerides, glycemia and insulinemia. We determined insulin-resistance according to the HOMA-IR model. We performed bivariate Pearson correlations to compare metabolic and socio-demographic/clinical parameters. Results The analyses showed positive correlations between BMI and disease duration (P = 0.003), and BMI and the number of episodes (P = 0.022). Furthermore, a positive correlation was found between HOMA-IR and the number of episodes per year (P = 0.008). The associations remained statistically significant after controlling for age through partial correlations. Conclusions Weight gain and insulin-resistance in severe mental illness are associated with a more severe SMI, as suggested by the greater number of acute episodes. Disclosure No significant relationships.
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- 2022
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