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Effect of resistance training volume on body adiposity,metabolic risk,and inflammation in postmenopausal and older females:Systematic review and meta-analysis of randomized controlled trials

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Journal of Sport and Health Science 2024年第2期13卷 145-159页

作者： Paulo Ricardo Prado Nunes Pamela Castro-e-Souza Anselmo Alves de oliveira Bruno de Freitas Camilo Gislaine Cristina-Souza Lucio Marques vieira-Souza Marcelo Augusto da silva Carneiro Department of Body and Human Movement Minas Gerais State University(UEMG)37902-092 PassosMGBrazil University Center of Planalto de Araxa(UNIARAXA) 38180-129 AraxaMGBrazil Physical Activity Health and Ageing Research Group(GPASE)Minas Gerais State University(UEMG)37902-092 PassosMGBrazil Exercise and Nutrition Research Group(GPEN) Minas Gerais State University(UEMG)37902-092 PassosMGBrazil Sport Sciences and Physical Exercise Study and Research Group(GEPCEEX) Minas Gerais State University(UEMG)37902-092 PassosMGBrazil Metabolism Nutrition and Exercise LaboratoryPhysical Education and Sport CenterLondrina State University(UEL)86050-070 LondrinaPRBrazil Postgraduate Program in Physical Education Federal University of Sergipe(UFS)49107-230 Sao CristovaoSEBrazil

Purpose:This meta-analytical study aimed to explore the effects of resistance training(RT) volume on body adiposity,metabolic risk,and inflammation in postmenopausal and older ***:A systematic search was performed for randomized controlled trials in PubMed,Scopus,Web of Science,and *** controlled trials with postmenopausal and older females that compared RT effects on body adiposity,metabolic risk,and inflammation with a control group(CG) were *** reviewers selected the studies,extracted the data,and performed the risk of bias and certainty of the evidence(Grading of Recommendations,Assessment,Development,and Evaluation(GRADE)) *** body and abdominal adiposity,blood lipids,glucose,and C-reactive protein were included for meta-analysis.A random-effects model,standardized mean difference(Hedges’ g),and 95% confidence interval(95%CI) were used for ***:Twenty randomized controlled trials(overall risk of bias:some concerns;GRADE:low to very low) with overweight/obese postmenopausal and older females were *** groups were divided into low-volume RT(LVRT,~44 sets/week) and high-volume RT(HVRT,~77 sets/week).Both RT groups presented improved body adiposity,metabolic risk,and inflammation when compared to ***,HVRT demonstrated higher effect sizes than LVRT for glucose(HVRT=-1.19;95%CI:-1.63 to-0.74;LVRT=-0.78;95%CI:-1.15 to-0.41) and C-reactive protein(HVRT=-1.00;95%CI:-1.32 to-0.67;LVRT=-0.34;95%CI,-0.63 to-0.04)) when compared to ***:Compared to CG,HVRT protocols elicit greater improvements in metabolic risk and inflammation outcomes than LVRT in overweight/obese postmenopausal and older females.

关键词： C-reactive protein Fat mass Lipid profile Menopause Strength training

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Highlighting COVID-19:What the imaging exams show about the disease

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World Journal of Radiology 2021年第5期13卷 122-136页

作者： Lorena Sousa de Carvalho Ronaldo Teixeira da silva Júnior bruna vieira silva oliveira Yasmin silva de Miranda Nara Lúcia Fonseca Rebouças Matheus Sande Loureiro Samuel Luca Rocha Pinheiro Regiane Santos da silva Paulo Victor silva Lima Medrado Correia Maria José Souza silva Sabrina Neves Ribeiro Filipe Antônio França da silva Breno Bittencourt de Brito Maria Luísa Cordeiro Santos Rafael Augusto oliveira Sodré Leal Márcio Vasconcelos oliveira Fabrício Freire de Melo Department of Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil

Coronavirus disease 2019(COVID-19),a global emergency,is caused by severe acute respiratory syndrome coronavirus *** gold standard for its diagnosis is the reverse transcription polymerase chain reaction,but considering the high number of infected people,the low availability of this diagnostic tool in some contexts,and the limitations of the test,other tools that aid in the identification of the disease are *** this scenario,imaging exams such as chest X-ray(CXR)and computed tomography(CT)have played important *** is useful for assessing disease progression because it allows the detection of extensive consolidations,besides being a fast and cheap *** the other hand,CT is more sensitive for detecting lung changes in the early stages of the disease and is also useful for assessing disease *** note,ground-glass opacities are the main COVID-19-related CT *** emission tomography combined with CT can be used to evaluate chronic and substantial damage to the lungs and other organs;however,it is an expensive *** ultrasound(LUS)has been shown to be a promising technique in that context as well,being useful in the screening and monitoring of patients,disease classification,and management related to mechanical ***,LUS is an inexpensive alternative available at the ***,magnetic resonance imaging,although not usually requested,allows the detection of pulmonary,cardiovascular,and neurological abnormalities associated with ***,it is important to consider the challenges faced in the radiology field in the adoption of control measures to prevent infection and in the follow-up of post-COVID-19 patients.

关键词： SARS-CoV-2 COVID-19 Pneumonia Pandemic Radiology Tomography

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Social determinants of gastrointestinal malformation mortality in Brazil:a national study

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World Journal of Pediatric Surgery 2024年第2期7卷 134-141页

作者： Ayla Gerk Amanda Rosendo Luiza Telles Aricia Gomes Miranda Madeleine Carroll bruna oliveira Trindade Sarah Bueno Motter Esther Freire Gabriella Hyman Julia Ferreira Fabio Botelho Roseanne Ferreira David P Mooney Joaquim Bustorff-silva Program in Global Surgery and Social Change Harvard Medical SchoolBostonMassachusettsUSA Faculty of Medicine and Health Sciences McGill UniversityMontrealQuebecCanada Harvey E.Beardmore Division of Pediatric Surgery The Montreal Children's HospitalMcGill University Health CentreMontrealQuebecCanada Department of Surgery Universidade Estadual de Campinas(UNICAMP)CampinasBrazil Instituto de Educação Médica(IDOMED/Estácio Campus Vista Carioca)Rio de JaneiroBrazil Faculty of Medicine Universidade Federal do Delta do ParnaibaParnaibaPiauiBrazil Universidade Federal de Ciencias da Saude de Porto Alegre Porto AlegreBrazil Universidade Federal da Bahia SalvadorBrazil Department of Health Research Methods McMaster UniversityHamiltonSouthern OntarioCanada Department of Pediatric Surgery Boston Children's HospitalBostonMassachusettsUSA

Introduction In Brazil,approximately 5%are born with a congenital disorder,potentially fatal without *** study aims to evaluate the relationship between gastrointestinal congenital malformation(GICM)mortality,health indicators,and socioeconomic factors in *** GICM admissions(Q39-Q45)between 2012 and 2019 were collected using national *** demographics,socioeconomic factors,clinical management,outcomes,and the healthcare workforce density were also accounted *** Surgical Workforce density and the number of neonatal intensive care units in a region were extracted from national datasets and combined to create a clinical index termed'NeoSurg'.Socioeconomic variables were combined to create a socioeconomic index termed SocEcon'.Simple linear regression was used to investigate if the temporal changes of both indexes were *** correlation between mortality and the different indicators in Brazil was evaluated using Pearson's correlation *** Over 8 years,Brazil recorded 12804 GICM *** Southeast led with 6147 cases,followed by the Northeast(2660),South(1727),North(1427),and Midwest(843).The North and Northeast reported the highest mortality,lowest NeoSurg,and SocEcon Index ***,mortality rates declined across regions from 7.7%(2012)to 3.9%(2019),a 51.7%*** North and Midwest experienced the most substantial reductions,at 63%and 75%,*** significantly correlated with the indexes in nearly all regions(p<0.05).Conclusion Our study highlights the correlation between social determinants of health and GICM mortality in Brazil,using two novel indexes in the pediatric *** findings provide an opportunity to rethink and discuss new indicators that could enhance our understanding of our country and could lead to the development of necessary solutions to tackle existing challenges in Brazil and globally.

关键词： Northeast Brazil globally

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Dehydrated Natural Feed for Cats: Influence on Apparent Digestibility Coefficient, Feces Scores, and Serum Immune, Antioxidant, and Metabolic Biomarkers

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Food and Nutrition Sciences 2024年第7期15卷 594-611页

作者： Bruno Giorgio de oliveira Cécere Guilherme Luiz Deolindo Bianca F. Bissacotti Priscila Marquezin Copetti Maria Rosa Chitolina Schetinger bruna Klein Matheus Delamea Baldissera Thiago Pereira Ribeiro Walter Hugo Cuelho Suarez Daniel Pigatto Monteiro Aleksandro Schafer Da silva Graduate Multicenter Program in Biochemistry and Molecular Biology University of the State of Santa Catarina Lages Brazil Department of Biochemistry and Molecular Biology Universidade Federal de Santa Maria (UFSM) Santa Maria Brazil Department of Animal Science Universidade Federal de Santa Maria (UFSM) Chapec Brazil Department of Health Science Universidade Franciscana (UFN) Santa Maria Brazil Department of Animal Nutrition Tectron-Tecnologia e Inovao Toledo Brazil

The present study aimed to determine whether natural dehydrated feed (DNF) can replace dry extruded feed while preserving the required daily intake, nutrient digestibility and benefits for immunity and antioxidant response in cats. The animals were divided into two groups of seven animals each. One group received DNF, and the other consumed commercial extruded dry feed (DCF). The experiment lasted 45 days and we measured daily consumption and collected blood and feces samples. The animals in the DNF group showed greater digestibility of fiber and mineral matter than DCF. Cats in the DNF group had a higher volume of feces. DNF cats had lower leukocyte and granulocyte counts and cholesterol levels. Serum enzymatic antioxidant responses and non-enzymatic were higher in DNF cats. Cats in the DNF group showed lower serum acute phase proteins in addition to a tendency toward a higher concentration of transferrin than in the DCF group. Fecal Escherichia coli and total coliform counts of cats fed DNF were higher than DCF. We conclude that the daily consumption of cats is adequate. This feed had greater digestibility of fiber and mineral matter, in addition to an improvement in antioxidant and immunological responses.

关键词： Alternative Feed Antioxidant Companion Animals Health

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Building Expertise on FAIR Through Evolving Bring Your Own Data(BYOD) Workshops: Describing the Data, Software, and Management-focused Approaches and Their Evolution

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Data Intelligence 2024年第2期6卷 429-456页

作者： César H.Bernabé Lieze Thielemans Rajaram Kaliyaperumal Claudio Carta Shuxin Zhang Celia W.G.van Gelder Nirupama Benis Luiz Olavo Bonino da silva Santos Ronald Cornet bruna dos Santos vieira Nawel Lalout Ines Henriques Alberto Camara Ballesteros Kees Burger Martijn G.Kersloot Friederike Ehrhart Esther van Enckevort Chris T.Evelo Alasdair J.G.Gray Marc Hanauer Kristina Hettne Joep de Ligt Arnaldo Pereira Nuria Queralt-Rosinach Erik Schultes Domenica Taruscio Andra Waagmeester Mark D.Wilkinson Egon L.Willighagen Mascha Jansen Barend Mons Marco Roos Annika Jacobsen Biosemantics Group Department of Human GeneticsLeiden University Medical CentreLeidenThe Netherlands NIHR Academic Fellow in General Practice University College London and The Royal Free NHS Foundation Trust National Centre for Rare Diseases Istituto Superiore di SanitaRomeItaly Department of Medical Informatics Amsterdam UMC location University of AmsterdamMeibergdreef 9AmsterdamThe Netherlands Amsterdam Public Health Methodology&Digital HealthAmsterdamThe Netherlands Health-Rl UtrechtThe Netherlands Semantics Services and Cybersecurity groupUniversity of TwenteEnschedeThe Netherlands Department of Medical Imaging Radboud Institute for Health SciencesRadboud University Medical CenterNijmegenThe Netherlands Department of Medical BioSciences Radboud University Medical CenterNijmegenThe Netherlands The Duchenne Parent Project VeneendaalThe Netherlands Departamento de Biotecnologia-Biologia Vegetal Escuela Tecnica Superior de Ingenieria AgronomicaAlimentaria y de BiosistemasCentro de Biotecnologia y Genomica de PlantasUniversidad Politecnica de Madrid(UPM)-Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria-CSIC(INIA-CSIC).Campus MontegancedoPozuelo de Alarcon(Madrid)Spain Castor AmsterdamThe Netherlands Department of Bioinformatics-BiGCaT Maastricht UniversityMaastrichtThe Netherlands University Medical Center Groningen University of GroningenGroningenThe Netherlands Maastricht Centre for Systems Biology(MaCSBio) Maastricht UniversityMaastrichtThe Netherlands Department of Computer Science Heriot-Watt UniversityEdinburghUK INSERM US14-OrphanetPlateforme Maladies RaresParisFrance Centre for Digital Scholarship Leiden University LibrariesThe Netherlands Center for Molecular Medicine Cancer Genomics NetherlandsDepartment of GeneticsUniversity Medical Center UtrechtUniversity UtrechtThe Netherlands University of Aveiro DETI/IEETAAveiroPortugal GO FAIR Foundation LeidenThe Netherlands The Leiden Academic Center for Drug Research LeidenThe Netherlands Micel

Since 2014,"Bring Your Own Data"workshops(BYODs)have been organised to inform people about the process and benefits of making resources Findable,Accessible,Interoperable,and Reusable(FAIR,and the FAIRification process).The BYOD workshops'content and format differ depending on their goal,context,and the background and needs of ***-focused BYODs educate domain experts on how to make their data FAIR to find new answers to research ***-focused BYODs promote the benefits of making data FAIR and instruct project managers and policy-makers on the characteristics of FAIRification ***-focused BYODs gather software developers and experts on FAIR to implement or improve software resources that are used to support ***,these BYODs intend to foster collaboration between different types of stakeholders involved in data management,curation,and reuse(*** experts,trainers,developers,data owners,data analysts,FAIR experts).The BYODs also serve as an opportunity to learn what kind of support for FAIRification is needed from different communities and to develop teaching materials based on practical examples and *** this paper,we detail the three different structures of the BYODs and describe examples of early BYODs related to plant breeding data,and rare disease registries and biobanks,which have shaped the structure of the *** discuss the latest insights into making BYODs more productive by leveraging our almost ten years of training experience in these workshops,including successes and encountered ***,we examine how the participants'feedback has motivated the research on FAIR,including the development of workflows and software.

关键词： FAIR FAIRification FAIR expertise Bring Your Own Data Workshop BYOD

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Indirect printing of hierarchical patient-specific scaffolds for meniscus tissue engineering

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Bio-Design and Manufacturing 2019年第4期2卷 225-241页

作者： Joao BCosta Joana silva-Correia Sandra Pina Alain da silva Morais Sílvia vieira Hélder Pereira Joao Espregueira-Mendes Rui LReis Joaquim M.oliveira B′s Research Group I3Bs-Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkZona Industrial da Gandra4805-017 Barco GmrPortugal ICVS/3B’s-PT Government Associate Laboratory Braga/GuimaraesPortugal The Discoveries Centre for Regenerative and Precision Medicine Headquarters at University of MinhoAvepark4805-017 BarcoGuimar'sPortugal Ripoll y De Prado Sports Clinic:Murcia-Madrid FIFA Medical Centre of Excellence MurciaSpain Orthopedic Department Centro Hospitalar Póvoa de Varzim Vila do CondePortugal Clínica do Dragao Espregueira-Mendes Sports CentreFIFA Medical Centre of ExcellencePortoPortugal Dom Henrique Research Centre PortoPortugal Orthopedic Department University of MinhoBragaPortugal

The complex meniscus tissue plays a critical role in the knee. The high susceptibility to injury has led to an intense pursuit for better tissue engineering regenerative strategies, where scaffolds play a major role. In this study, indirect printed hierarchical multilayered sca ffolds composed by a silk fibroin (SF) upper layer and an 80/20 (w/w) ratio of SF/ionic-doped β-tricalcium phosphate (TCP) bottom layer were developed. Furthermore, a comparative analysis between two types of sca ffolds pro- duced using di fferent SF concentrations, i.e., 8% (w/v) (Hi8) and 16% (w/v) (Hi16) was performed. In terms of architecture and morphology, the produced sca ffolds presented homogeneous porosity in both layers and no di fferences were observed when comparing both sca ffolds. A decrease in terms of mechanical performance of the sca ffolds was observed when SF concentration decreased from 16 to 8% (w/v). Hi16 revealed a static compressive modulus of 0.66 ± 0.05 MPa and dynamical mechanical properties ranging from 2.17 ± 0.25 to 3.19 ± 0.38 MPa. By its turn, Hi8 presented a compressive modulus of 0.27 ± 0.08 MPa and dynamical mechanical properties ranging from 1.03 ± 0.08 MPa to 1.56 ± 0.13 MPa. In vitro bioactivity studies showed formation of apatite crystals onto the surface of Hi8 and Hi16 bottom layers. Human meniscus cells (hMCs) and human primary osteoblasts were cultured separately onto the top layer (SF8 and SF16) and bottom layer (SF8/TCP and SF16/TCP) of the hierarchical sca ffolds Hi8 and Hi16, respectively. Both cell types showed good adhesion and proliferation as denoted by the live/dead staining, Alamar Blue assay and DNA quanti fication analysis. Subcutaneous implantation in mice revealed weak in flammation and sca ffold’s integrity. The hierarchical indirect printed SF sca ffolds can be promising candidate for meniscus TE sca ffolding applications due their suitable mechanical properties, good biological performance and possibility of being applied in a patie

关键词： Patient-specific Indirect printing Hierarchical Silk fibroin Enzymatic-cross-linking Meniscus

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Different culture conditions applied to in vitro shoot multiplication of two Eucalyptus benthamii explant sources

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Journal of Forestry Research 2020年第3期31卷 857-869页

作者： Natalia Pimentel Esposito-Polesi Leandro silva de oliveira Francisco Jose Benedini Baccarin Cristina vieira de Almeida Marcilio de Almeida Biological Science Department "Luiz de Queiroz"Superior College of AgricultureUniversity of Sao Paulo(ESALQ/USP)Padua Dias Avenue11P.O.Box 9PiracicabaSP 13418-900Brazil Institute of Agriculture Sciences Federal University of Minas Gerais(UFMG)Universitaria Avenue1000Montes ClarosMG 39404-547Brazil State University of Goias(UEG) Rua S7Qd.1S SulPalmeiras de GoiasGO 76190-000Brazil In vitro Palm Consultoria Estudo e Desenvolvimento Biologico LtdaRua Itajobi421PiracicabaSP 13432-000Brazil

Eucalyptus adult material requires more successive subcultures in the in vitro multiplication phase for increased vigor and cellular activity. This study evaluated the endophytic manifestation and shoot multiplication of one 13-year-old Eucalyptus benthamii clone under different culture conditions and used canopy branches(CB) and trunk base material as explant sources. The culture media were wood plant medium(WPM), Murashige and Skoog medium(MS) and JADS(Correia and co-authors medium).Based on the results of the initial multiplication experiment, further tests examined sucrose concentrations and p H. Morphophysiology, dry mass production, endophyticmanifestation and histochemical were determined. Explant sources responded differently to MS and JADS media, but the WPM medium promoted homogeneous *** responses were similar for both explant sources when sucrose concentrations varied. Shoots died in the absence of sucrose, showed high oxidation at 60 g L-1 and optimal development at 30 g L-1. Endophytes were more evident for shoots from the CB origin. Explant sources responded distinctively to treatment due to physiological and intrinsic genetic factors. Therefore, explant sources, different culture media, sucrose concentration and p H may determine micropropagation success and influence the presence and/or intensity of endophytic manifestation.

关键词： Plant tissue culture Explant sources Culture media Sucrose pH

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High-throughput phenotyping of two plant-size traits of Eucalyptus species using neural networks

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Journal of Forestry Research 2022年第2期33卷 591-599页

作者： Marcus Vinicius vieira Borges Janielle de oliveira Garcia Tays silva Batista Alexsandra Nogueira Martins silva Fabio Henrique Rojo Baio Carlos Antônio da silva Junior Gileno Brito de Azevedo Glauce Taís de oliveira Sousa Azevedo Larissa Pereira Ribeiro Teodoro Paulo Eduardo Teodoro Federal University of Mato Grosso Do Sul(UFMS) Chapadão Do SulMato Grosso Do Sul 79560000Brazil Department of Geography State University of Mato Grosso(UNEMAT)SinopMato Grosso 78555000Brazil

In forest modeling to estimate the volume of wood,artificial intelligence has been shown to be quite effi-cient,especially using artificial neural networks(ANNs).Here we tested whether diameter at breast height(DBH)and the total plant height(Ht)of eucalyptus can be pre-dicted at the stand level using spectral bands measured by an unmanned aerial vehicle(UAV)multispectral sensor and vegetation *** do so,using the data obtained by the UAV as input variables,we tested different configurations(number of hidden layers and number of neurons in each layer)of ANNs for predicting DBH and Ht at stand level for different Eucalyptus *** experimental design was randomized blocks with four replicates,with 20 trees in each experimental *** treatments comprised five Eucalyptus species(***,***,***,***-dis,and ***)and Corymbria *** and Ht for each plot at the stand level were measured seven times in separate overflights by the UAV,so that the multispectral sensor could obtain spectral bands to calculate vegetation indices(VIs).ANNs were then constructed using spectral bands and VIs as input layers,in addition to the categorical variable (species), to predict DBH and Ht at the stand level simultaneously. This report represents one of the first appli-cations of high-throughput phenotyping for plant size traits in Eucalyptus species. In general, ANNs containing three hidden layers gave better statistical performance (higher esti-mated r, lower estimated root mean squared error-RMSE) due to their greater capacity for self-learning. Among these ANNs, the best contained eight neurons in the first layer, seven in the second, and five in the third (8 − 7 − 5). The results reported here reveal the potential of using the gener-ated models to perform accurate forest inventories based on spectral bands and VIs obtained with a UAV multispectral sensor and ANNs, reducing labor and time.

关键词： Computational intelligence Diameter at breast height Forest inventory Remote sensing Vegetation indices

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In vitro antibacterial effect of aqueous and ethanolic Moringa leaf extracts

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Asian Pacific Journal of Tropical Medicine 2011年第3期4卷 201-204页

作者： Jackson Rafael oliveira Peixoto Giselle Cristina silva Renata Albuquerque Costa Joseires Lira de Sousa Fontenelle Gustavo Hitzschky Fernandes vieira Antonio Adauto Fonteles Filho Regine Helena silva dos Fernandes vieira Sea Sciences Institute Federal University of CearaBrazil Fisheries Engineering Department Federal University of CearaBrazil Federal University of Ceara Brazil Biology Department State University of Acarau ValleyBrazil

Objective:To evaluate the antibacterial effect of aqueous and ethanolic moringa leaf extracts (Moringa oleifera) on the growth of gram-positive and negative ***:Paper disks were soaked with 100,200,300 and 400μL of extract at 20 g/180mL and 10 g/190 *** extracts were tested against Escherichia coli(ATCC25922),Staphylococcus aureus(ATCC25923),Vibrio parahaemolyticus,Enterococcus faecalis(ATCC29212),Pseudomonas aeruginosa(ATCC27853), Salmonella enteritidis(IH) and Aeromonas *** susceptibility tests were performed using the modified disk diffusion ***:The strains ***,*** and *** (IH) were resistant to all *** general,disks with 400μL extract were the most efficient against ***,***,*** and ***:The study indicates a promising potential for aqueous and ethanolic Moringa leaf extracts as alternative treatment of infections caused by the tested strains.

关键词： Moringa oleifera Activity antibacterial Gram positive and negative bacteria

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Light intensity and hydrogel soil amendment differentially affect growth and photosynthesis of successional tree species

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Journal of Forestry Research 2023年第1期34卷 257-268页

作者： Léo vieira Leonel Fabrício de oliveira Reis Fábio Afonso Mazzei Moura de Assis Figueiredo Tiago Massi Ferraz Sebastiao de oliveira Maia Júnior Patrick Costa silva Jailma Ribeiro de Andrade Graduate Program in Agroecology State University of MaranhaoAv.Lourenco Vieira da Silva1000Jardim Sao CristovaoSao LuísMaranhao 65055-310Brazil State University of Maranhao Av.Lourenco Vieira da Silva1000Jardim Sao CristovaoSao LuísMaranhao 65055-310Brazil Graduate Program in Agriculture and Environment State University of MaranhaoPraca Goncalves Diass/nCentroBalsasMaranhao 65800-000Brazil

Global climate changes have increased temperatures,radiation indexes,and consequently,irregularities in rainfall in mainly tropical countries,considerably hindering plant establishment in recovering degraded *** objective of this study was to evaluate the growth and physiological characteristics of one species of each successional group:pioneer,secondary,and climax when subjected to different light intensities and hydrogel as a soil conditioner during rainy and dry *** experiment was conducted in the ecotone between Brazil’s two largest biomes,the Cerrado and the Amazon in the State of Maranh?*** parameters consisted of three species:Guazuma ulmifolia Lam.(pioneer),Astronium fraxinifolium Schott(secondary),and Cariniana rubra Gardner ex Miers(climax).There were two light intensities:70%and 100%,and two planting conditions:with and without soil conditioner(hydrogel).Gas exchanges were higher during the rainy season;the pioneer and secondary species had greater heights and photosynthetic rates in the dry period;the climax species had the lowest gas exchange and lowest recovery as rainfall *** pioneer and secondary species showed higher physiological plasticity,denoting better adaption to environments with high *** improved the photosynthetic performance of these species in the dry season and in areas with 100%sunlight.

关键词： Irradiance Hydrogel Photosynthetic efficiency Physiological plasticity

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