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Assessment of Poultry Feed Contamination Level by Aflatoxin B1: Quantification by Two Chromatographic Analysis Methods

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Food and Nutrition Sciences 2022年第11期13卷 950-961页

作者： Rokhaya Gueye viviane Chatchueng Sandefo Babacar Beye Elhadji Ousmane Faye Amadou Diop Serigne Omar Sarr Bara Ndiaye Yérim Mbagnick Diop Laboratoire de Chimie Analytique et Bromatologie Faculté de Médecine de Pharmacie et d’Odontologie-Stomatologie Université Cheikh Anta DIOP Dakar Sénégal Laboratoire de Mycotoxines Institut de Technologie Alimentaire Route des Pères Maristes Dakar Sénégal

Aflatoxin B1 is a mycotoxin that can contaminate a wide feedstuffs variety. Ingestion of contaminated feed by poultry can lead to impaired health and zootechnical performances but also a human diet safety problem related to residues presence in animal origin products. Aflatoxin B1 contamination of poultry feed samples marketed in Dakar city and in peri-urban areas (Gorom, Sangalkam) was studied. A total of 15 samples were collected from Dakar city markets as well as from poultry farms in Gorom and Sangalkam areas. Aflatoxin B1 quantification was performed by high performance liquid chromatography and thin-layer chromatography. HPLC results showed that all samples were contaminated with levels ranging from 0.15 to 22 ppb, 0.099 to 2.05 ppb and 0.099 to 4.95 ppb respectively for Gorom, Sangalkam and Dakar. Only the finishing feed from Gorom had an aflatoxin B1 level above the maximum limit set by regulations. TLC is a suitable method for aflatoxins detection. However, it was associated with overestimation for aflatoxin B1 quantification. Results suggest that poultry feed represents a real source of human diet contamination. In addition, HPLC remains the most reliable quantification technique for quality control.

关键词： Poultry Feed Aflatoxin High Performance Liquid Chromatography Thin-Layer Chromatography Dakar

Assessment of Soils Developed on Various Formations in Maroua (Far North, Cameroon) for Production of Compressed Earth Bricks

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Open Journal of Applied Sciences 2023年第6期13卷 874-887页

作者： Bertin Pagna Kagonbé Bakary Souleymanou viviane Djaoyang Bakaïné Raphael Essama Boum Belinga Bertrand Tatoh Aziwo Alexis Ngoniri Hamdja Likiby Boubakar Local Materials Promotion Authority (MIPROMALO) Yaounde Cameroon National Institute of Cartography (INC) Yaounde Cameroon

One of the most important materials in the building industry is earth brick. The current work focuses on the evaluation of Maroua soils and their potential usage in the manufacturing of Compressed earth blocks (CEB). Four sites (Frolina, Goubeou, Mambang, and Djoulgouf) were chosen to conduct this study. One sample was collected at each location. Physico-chemical and mineralogical characteristics were obtained by using particle size, Atterberg limits, X-ray diffraction, and X-ray fluorescence analysis. Results revealed that sand is the most abundant fraction (36.9% - 50.5%) followed by clay (22.1% - 28.4%) and silt (11.3% - 23.8%). They mostly correspond to sandy soils. Liquid and Plastic limits range between 22.6% to 41% and 16.1% to 24.9% respectively and the plasticity index spans from 6.5% to 20.3%. Plasticity is low for Mambang and Djoulgouf and medium for Goubeou and Frolina soils. Mineralogical composition revealed the presence of smectite, kaolinite, and illite as clay minerals, associated with variable amounts of quartz, goethite, and K-feldspars. Geochemical analyses indicate a high silica content (47.1% - 72.8%) followed by alumina (10.9% - 22.8%) and iron (6.4% - 13.2%). The mineralogical, chemical and physical properties of the studied soils revealed that they are suitable for the manufacture of CEB according to the Cameroon Standards of CEB.

关键词： Soil Physical Properties Mineralogy Geochemistry CEB Maroua-Cameroon

Evolution of sexual size dimorphism and its relationship with sex ratio in carabid beetles of Genus Ceroglossus Solier

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Current Zoology 2013年第6期59卷 769-777页

作者： Hugo A. BENITEZ Jorge AVARIA-LLAUTUREO Cristian B.CANALES-AGUIRRE viviane JEREZ Luis E. PARRA Cristifin E.HERNANDEZ Faculty of Life Sciences University of Manchester Michael Smith Building Oxford Road Manchester M13 9PT UK Instituto de Alta Investigaci6n Universidad de Tarapaca Casilla 7-D Arica Chile Departamento de Zoologia Facultad de Ciencias Naturales y Oceanograficas Universidad de Concepcion Casilla 160-C Concepcion Chile Departamento de Oceanografia Facultad de Ciencias Naturales y Oceanograficas Universidad de Concepci6n Casilla 160-C Concepcion Chile

Although the degree of mate competition, given extreme differences in sex ratio, explains much of the pattern of male-biased size dimorphism among diverse taxa, it fails for some species which have potential for intense male competition for mates and yet exhibit little or no sexual size dimorphism (SSD). This fact suggest that species with low SSD should be express the effect of evolutionary pressure in non-obvious geometrical shape promoted by sex ratio in an evolutionary time scale. To evaluate this hypothesis we used phylogenetic comparative method in a Bayesian framework to investigate the evolution of SSD and the role of sex ratio at inter-specific level in the species ofCeroglossus(Coleoptera: Carabidae). In our results the proportion farthest from 1:1 is associated with more disparate body shape, even though the entire group has minimum variation in sex ratio, which is an intrinsic life history character of this group considering its phylogenetic conservatism or phylogenetic signal. We suggest that the sex ratio has determined the dimorphism degree during evolution of this group, since both traits have increased or decreased together during the species divergence (i.e. positive phylogenetic correlation: r2≈0.85). We suggest that morphological studies of SSD will benefit from using comparative method with Bayesian approaches to assess the effect of phylogenetic history and its uncertainty. Finally, this will be allow to researchers to quantify the uncertainty of specific evolutionary hypotheses accounting for observed sexual dimorphism patterns.

关键词：进化保守性性别比例两性异形步甲科贝叶斯方法物种分化系统发育不确定性

Therapeutic effectiveness of a single exercise session combined with WalkAide functional electrical stimulation in post-stroke patients:a crossover design study

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Neural Regeneration Research 2021年第5期16卷 805-812页

作者： viviane Rostirola Elsner Lucieli Trevizol Isadora de Leon Marcos da Silva ThaynáWeiss Milena Braga Daniela Pochmann Amanda Stolzenberg Blembeel Caroline Dani Elenice Boggio Curso de Fisioterapia do Centro Universitário Metodista-IPA Porto AlegreRSBrasil Programa de Pós-Graduação em Biociências e Reabilitação do Centro Universitário Metodista-IPA Porto AlegreRSBrasil Programa de Pós-Graduação em Ciências Biológicas:Fisiologia Universidade Federal do Rio Grande do SulPorto AlegreRSBrasil

A growing body of evidence has suggested that the imbalance of epigenetic markers and oxidative stress appears to be involved in the pathophysiology and progression of ***,strategies that modulate these biomarkers might be considered targets for neuroprotection and novel therapeutic opportunities for these *** exercise has been reported to induce changes in these epigenetic markers and improve clinical outcomes in different ***,little is reported on this in post-stroke *** purpose of this study was to investigate the effect of a single exercise session with WalkAide functional electrical stimulation(FES)on cognitive performance,clinical functional parameters,oxidative stress and epigenetic modulation in post-stroke *** this crossover design study,12 post-stroke individuals aged 54–72 years of either sexes were included and subjected to a single session of exercise(45 minutes)without WalkAide functional electrical stimulation(EXE alone group),followed by another single session of exercise(45 minutes)with WalkAide functional electrical stimulation(EXE+FES group).The clinical functional outcome measures,cognitive performance and blood collections for biomarker measurements were assessed pre-and *** intervention,higher Berg Balance Scale scores were obtained in the EXE+FES group than in the EXE alone *** was no significant difference in the Timed Up and Go test results post-intervention between EXE alone and EXE+FES *** intervention,a better cognitive performance was found in both groups compared with before the *** intervention,the Timed Up and Go test scores were higher in the EXE+FES group than in the EXE alone *** addition,the intervention induced lower levels of lipid *** intervention,carbonyl level was lower,superoxide dismutase activity and superoxide dismutase/catalase activity ratio were higher in the EXE+FES group,compared with the

关键词： cognition epigenetic exercise functional electrical stimulation functional mobility oxidative stress stroke WalkAide

New flavan and unusual chalcone glycosides from Drypetes parvifolia

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Chinese Chemical Letters 2008年第8期19卷 943-946页

作者： viviane Nadège Nenkep Jovita Chi Shirri Hanh Trinh Van-Dufat Falindor Sipepnou Philippe Vérité Elisabeth Seguin Francois Tillequin Jean Wandji Department of Organic Chemistry University of Yaounde-1Faculty of ScienceP.O.Box 812YaoundeCameroon Laboratoire de Pharmacognosie de l'Université Paris Descartes UMR/CNRS N 8638Faculté des Sciences Biologiques et Pharmaceutiques4-Avenue de l'Observatoire75006 ParisFrance Laboratoire de Chimie Analytique UFR de Médecine Pharmacie Rouen22-Bid Gambetta76183 Rouen Cedex 1France Laboratoire de Pharmacognosie UFR de Médecine Pharmacie Rouen22-Bld Gambetta76183 Rouen Cedex 1France

Two new compounds 7-hydroxy-5-O-（β-D-glucopyranoside） flavan （1） and （Z）-4＇,6＇-dihydroxy-2＇-O-（β-D-glucopyranoside） chalcone （2）, along with eight known compounds, were isolated from the stem bark of Drypetes parvifolia （Euphorbiaceae）. Their structures were established on the basis of spectroscopic analysis and chemical evidence.

关键词： Drypetes parvifolia Flavonoid glycosides 7-Hydroxy-5-O-(β-D-glucopyranoside) flavan (Z)-4',6'-Dihydroxy-2'-O-(β-D-glucopyr-anoside) chalcone

GO FAIR Brazil:A Challenge for Brazilian Data Science

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Data Intelligence 2020年第1期2卷 238-245,316,317页

作者： Luana Sales Patricia Henning viviane Veiga Maira Murrieta Costa Luis Fernando Sayao Luiz Olavo Bonino da Silva Santos Luis Ferreira Pires Instituto Brasileiro em Informacao em Ciencia e Tecnologia Rio de Janeiro-RJ22290-160Brazil Universidade Federal do Estado do Rio de Janeiro Rio de Janeiro-RJ22290-240Brazil Fundacao Oswaldo Cruz Rio de Janeiro-RJ21040-900Brazil Ministerio da Ciencia TecnologiaInovacoes e ComunicacoesEsplanada dos MinisteriosBloco R-BrasiliaDFCEP 70067-900Brazil Comissao Nacional de Energia Nuclear Rua Gal.Severianon 90 Bairro:BotafogoCEP 22290-901-Rio de JaneiroBrazil GO FAIR International Support&Coordination Office(GFISCO) Leiden 2333 AAThe Netherlands University of Twente Enschede 7522 NHThe Netherlands

The FAIR principles,an acronym for Findable,Accessible,Interoperable and Reusable,are recognised worldwide as key elements for good practice in all data management *** understand how the Brazilian scientific community is adhering to these principles,this article reports Brazilian adherence to the GO FAIR initiative through the creation of the GO FAIR Brazil Office and the manner in which they create their implementation *** contextualise this understanding,we provide a brief presentation of open data policies in Brazilian research and government,and finally,we describe a model that has been adopted for the GO FAIR Brazil implementation *** Brazilian Institute of Information in Science and Technology is responsible for the GO FAIR Brazil Office,which operates in all fields of knowledge and supports thematic implementation ***,GO FAIR Brazil-Health is the first active implementation network in operation,which works in all health domains,serving as a model for other fields like agriculture,nuclear energy,and digital humanities,which are in the process of adherence *** report demonstrates the strong interest and effort from the Brazilian scientific communities in implementing the FAIR principles in their research data management practices.

关键词： FAIR principles GO FAIR GO FAIR Brazil Open Science Research data

Accuracy of Rapid Prototyping Biomodels Plotted by Three Dimensional Printing Technique:Ex Vivo Study

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Advances in Computed Tomography 2013年第2期2卷 41-45页

作者： Lucio Costa Safira Luana Costa Bastos Valter Estevao Beal Roberto Almeida de Azevedo carlos Eduardo Francischone viviane Almeida Sarmento Research Center Sao Leopoldo Mandic CampinasBrazil School of Dentistry Federal University of BahiaSalvadorBrazil SENAI-CIMATEC SalvadorBrazil School of Dentistry of Bauru University of Sao PauloBauruBrazil School of Dentistry State University of Feira de SantanaFeira de SantanaBrazil

The rapid prototyping biomodels manufacturing is a recent technology with great importance in oral and maxillofacial surgery. It provides a better surgical planning, decrease of anesthesia time and great functional and esthetic results. The aim of this experimental study was to evaluate the accuracy of rapid prototyping biomodels built by three-dimensional printing (3DP) technique, since this is one of the least expensive methods available. Linear measurements of standardized bone defects and anatomic distances were compared using a digital caliper of high precision in nine dry mandibles (gold standard) and their respective biomodels. The Bland-Altman test was used for statistical analysis (5% level of significance). The results showed strong concordance between the dry mandibles and their respective biomodels, with discrepancies smaller than 2 mmin most cases (97.4%). We can conclude that the biomodels built by 3DP technique can be used for surgical planning in Dentistry.

关键词： Rapid Prototyping Models Computed Tomography Mandible

Aquatic exercise program-modulated oxidative stress markers in patients with Parkinson's disease

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Neural Regeneration Research 2020年第11期15卷 2067-2072页

作者： Caroline Dani Isabel Teixeira Proenca Jessica Marinho Pamela Peccin Ivy Reichert Vital da Silva Simone Nique Vera Striebel Daniela Pochmann viviane Rostirola Elsner Programa de Pos Graduacao em Biociencias e Reabilitacao do Centro Universitario Metodista-IPA Porto AlegreRSBrazil Curso de Fisioterapia do Centro Universitario Metodista-IPA Porto AlegreRSBrazil Programa de Pos Graduacao em Ciencias Biologicas:Fisiologia Universidade Federal do Rio Grande do SulPorto AlegreRSBrazil Programa de Pos Graduacao em Farmacologia e Terapeutica Universidade Federal do Rio Grande do SulPorto AlegreRSBrazil

Parkinson's disease is a neurodegenerative *** stress,i.e.,the imbalance between the generation of reactive oxygen species and the antioxidant defense capacity of the body,plays an important role in the pathogenesis of this *** exercise can regulate oxidative *** purpose of this study was to analyze the short-and long-term effects of an aquatic exercise program on oxidative stress levels in patients with Parkinson's *** aquatic exercise program was carried out during 1 month with two sessions per week(1 hour/session).Blood samples were collected at four different time points:pre-intervention,immediately,48 hours,and 30 days after the first session of aquatic exercise *** results revealed that water-based programs modulated antioxidant enzyme activity,increased superoxide dismutase activity,reduced catalase activity,and increased the ratio of superoxide dismutase activity to catalase activity in patients with Parkinson's *** with pre-intervention and 48 hours after the first session of aquatic exercise program,superoxide dismutase activity was higher and catalase activity was lower immediately and 30 days after the first *** results demonstrated that aquatic exercise program could modulate oxidative stress,mainly by the effect of antioxidant enzyme *** results could better help understand the target of oxidative stress in Parkinson's *** study was approved by the Ethics Committee of Centro Universitário Metodista IPA(approval No.1.373.911)on August 9,2019 and registered with REBEC(registration number:RBR-6 NJ4 MK).

关键词： antioxidant enzyme antioxidants aquatic exercise exercise therapies neurodegenerative disease oxidative stress Parkinson's disease

Microcephaly prevalence after the 2015 to 2016 Zika outbreak in Tangará da Serra, Brazil: a population-based study

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Reproductive and Developmental Medicine 2022年第2期6卷 98-103页

作者： Juliana Herrero da Silva Ana Claudia Pereira Tercas-Trettel Juliano Andre Boquett Giovanny Vinicius Araujo Franca Augusto Cesar Cardoso-dos-Santos Marina Atanaka Marcelo Zagonel Oliveira Anna Pires Terra viviane Karoline Vivi Lucia Andreia Nunes de Oliveira Lucia Schaedler Ronaldo Fernandes Santos Alves Lavinia Schuler-Faccini Prefeitura Municipal de Tangara da Serra Secretaria de SaudeVigilancia EpidemiologicaTangara da SerraBrazil Programa de Pos-Graduacao em Genetica e Biologia Molecular Universidade Federal do Rio Grande do SulPorto AlegreBrazil Universidade do Estado de Mato Grosso Tangara da SerraBrazil Programa de Pos-Graduagcao em Saude Coletiva Universidade Federal de Mato GrossoCuiabaBrazil Instituto Nacional de Genetica Medica Populacional-INaGeMP Servico de Genetica MedicaHospital de Clinicas de Porto Alegre(HCPA)Porto AlegreBrazil Programa de Pos-Graduacao em Saude da Crianga e do Adolescente Universidade Federal do Rio Grande do SulPorto AlegreBrazil Secretaria de Vigilancia em Saude Ministerio da SaudeBrasiliaBrazil Laboratorio de Visualizacao Avangada e Geoinformatica(VIZLab) Programa de Pos-Graduacao em Computacao AplicadaUniversidade do Vale do Rio dos SinosSao LeopoldoBrazil Programa de Pos-Graduacao em Ciencia da Informacao Universidade Federal do Rio Grande do SulPorto AlegreBrazil Clinica Santa Luzia Tangara da SerraBrazil

Objective::Prenatal infection with the Zika virus (ZIKV) can lead to congenital Zika syndrome (CZS), characterized by microcephaly and brain injury. However, there are questions regarding the prevalence of microcephaly/CZS after the ZIKV outbreak in defined geographic areas. This study aimed to identify adverse outcomes in live births of fetuses exposed in utero to the ZIKV, compared to unexposed births, as well as maternal sociodemographic, delivery, and birth ***::Here, we conducted a cross-sectional observational study to investigate the characteristics of all live births in the city of Tangará da Serra, Mato Grosso, Brazil, in 2016, after the outbreak of ZIKV infection in late 2015. All live births of children to women residing in the municipality of Tangará da Serra between January 1 and December 31, 2016, were evaluated, and head circumference was measured at birth and after 24 hours. Children born with microcephaly or a maternal history of confirmed or suspected prenatal ZIKV infection were evaluated by a multidisciplinary team. The outcomes of the exposed and non-exposed children were compared. Prevalence ratios and their respective 95% confidence intervals were calculated for sociodemographic, delivery, and live birth ***::Of 1,441 live births, 106 (7.3%) were from mothers with confirmed or highly probable exposure to ZIKV. The prevalence of severe congenital microcephaly (41.7/10,000) in Tangará da Serra in 2016 was ten-fold higher than that in Latin America before ***::This study may serve as a model to investigate possible outbreaks of infections in a defined geographical space in the future.

关键词： Epidemiology Live births Microcephaly Zika virus