检索结果-南通市图书馆

Quality of life, elderly and physical activity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Health 2012年第2期4卷 88-93页

作者： Carlos Soares Pernambuco Bernardo Minelli Rodrigues Jani Cleria Pereira Bezerra Alessandro Carrielo André dias de Oliveira Fernandes Rodrigo Gomes de souza Vale Estelio Henrique Martin Dantas Biosciences of Human Motricity Laboratory Labimh/Unirio Rio de Janeiro Brazil Universidade Trás os Montes e Alto Douro Vila Real Portugal

The concept of quality of life is multiple concerns as a cultural, social and environmental individuality. The aim of this study was to verify the levels of quality of life in elderly practitioners of physical activity comparing a active group with a control group The sample consisted of 159 physically independent and apparently healthy individuals of either sex, with mean age of 66.61 ± 4.73 years. Active group obtained mean 14.32 ± 0.763 in whoqol’s scores for levels of quality of life, the Control group (CG) obtained mean 13.31 ± 0.94 and p-value 0.05. The ANOVA with repeated samples showed higher values for active group when compared with control group after intervention, the significant level was p < 0.05. It must be recognized that not every aspect of human life is reduced to the practice of physical activity;however, it is an important instrument that generates well-being in this age group.

关键词： Quality of Life Aged Motor Activity Exercise

Thermal and Crystallization Behavior of PLA/PLLA-Grafting Cellulose Nanocrystal

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Materials Sciences and Applications 2020年第1期11卷 44-57页

作者： Erika M. Inácio Diego H. S. souza Marcos L. dias Instituto de Macromoléculas Professora Eloisa Mano (IMA) Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil

PLLA-modified cellulose nanocrystals (CNC) were produced from commercial CNC by tin-catalyzed polymerization of lactide in presence of CNC. FTIR spectroscopy demonstrated that the result of the reaction produced the grafting of PLLA chains onto CNC surface (CNC-g-PLLA). Films of poly(lactic acid) (PLA) and PLA/CNC nanocomposites (with non-modified CNC and CNC-g-PLLA) containing 0.5% and 5% (w/w) of the nanofillers were prepared by casting in chloroform solution and the crystallization behavior and thermal properties investigated. All nano-composites had similar thermal stability when analyzed by TGA analyses under an inert nitrogen atmosphere. Addition of both types of CNC influenced crystallization, the higher crystallization rate being observed for 5% (w/w) CNC. Nanocomposites with 5% (w/w) CNC-g-PLLA had the strain resistance of PLA improved in the rubbery state. PLLA-modification of CNC surface increased the crystallization of PLA in PLA/CNC nanocomposites and improved the rigidity at temperatures above the glass transition, properties which are desirable for hot drinking application.

关键词： Nanocrystals Cellulose Poly(Lactic Acid) Grafting Crystallizations

Biotechnological Potential of Carotenoids Produced by Extremophilic Microorganisms and Application Prospects for the Cosmetics Industry

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Microbiology 2020年第8期10卷 397-410页

作者： Tayane de Cássia dias Mendes-Silva Rosileide Fontenele da Silva Andrade Marcio Akio Ootani Paulo Vitor dias Mendes Rafael Artur de Queiroz Cavalcanti de Sá Milena Roberta Freire da Silva Karolayne Silva souza Maria Tereza dos Santos Correia Márcia Vanusa da Silva Maria Betânia Melo de Oliveira department of Biochemistry Federal University of Pernambuco Recife Brazil National Program Postdoctoral CAPES (PNPD) Catholic University of Pernambuco Recife Brazil Bioprocess Laboratory Center of Strategic Technologies Northeast Recife Brazil design department Federal University of Pernambuco Recife Brazil Nucleus of Bioprospecting and Conservation of the Caatinga Semiarid National Institute/Ministry of Science Technology Innovations and Communications Campina Grande Brazil

Carotenoids are isoprenoid pigments used in food, chemical, textile, pharmaceutical, and cosmetic industries. They act not only as dyes and provitamins A but also have antioxidants, photoprotective, antimicrobial properties, among others. This class of pigment can be obtained traditionally by plants or chemical synthesis, but they have some disadvantages. In recent years, search for alternative sources has been an important strategy for the carotenoid industries. Microbial synthesis is an alternative that has shown good yields, speed, and reduced production costs. Hostile environments, such as the Caatinga domain, represent an interesting source of microorganisms that produce biomolecules, especially carotenoids, because of oxidative stress caused by sunlight. Thus, this region has been attracting the attention of the scientific community and industry for the use of these organisms in the production of carotenoids and applications in cosmetic products;since these compounds have interesting antioxidant and photoprotective properties. In this review, general characteristics of carotenoids, sources of production, industrial applicability, and commercialization will be discussed, as well as perspectives on the production of carotenoids from microorganisms isolated from the Caatinga and their application in anti-UV products.

关键词： Natural Pigment Microbial Production Hostile Environments Antioxidant Photoprotection

Contribution to the Study of Phytosterols and Phenolics from the Barks and Leaves of the Trichilia catigua ***.,Meliaceae

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Analytical Sciences, Methods and Instrumentation 2012年第1期2卷 37-41页

作者： Jessé Boquett Lagos Carlos Alberto Bruel Gemin Josiane de Fátima Gaspari dias Marilis Dallarmi Miguel Ranieri Campos Joao Luiz de souza Carvalho Márcia do Rocio Duarte Obdulio Gomes Miguel Programa de Pós-Graduacao em Ciências Farmacêuticas Universidade Federal do ParanáAv.Pref.Lothário MeissnerCuritibaPRBrazil

Trichilia catigua is a Brazilian native species known as "catuaba”. This study investigated the chromatographic features hydroalcoholic extracts that were obtained by different techniques, from barks and leaves. The chromatographic analysis has demonstrated the presence of chlorogenic acid, epicathechin and cathechin, as well as the presence of β-sitosterol and stigmasterol in both analyzed plant parts. The best results were those when it was used turbo-extraction, extraction using Soxhlet apparatus and ethanol 50%.

关键词： Trichilia Catigua Catuaba Chromatography

Habitat specialization and phylogenetic structure of tree species in a coastal Brazilian white-sand forest

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2014年第2期7卷 134-144页

作者： Alexandre A.de Oliveira Alberto Vicentini Jerome Chave Camila de T.Castanho Stuart J.Davies Adriana M.Z.Martini Renato A.F.Lima Ricardo R.Ribeiro Amaia Iribar Vinicius C.souza Instituto de Biociências Universidade de São PauloRua do Matão321Travessa 14São PauloSP 0550890Brazil Instituto Nacional de Pesquisas da Amazônia Av.AndréAraújo2936CP 478.ManausAM 69060001Brazil Evolution et DiversitéBiologique Bâtiment 4R1 UniversitéPaul Sabatier118 route de Narbonne31062 ToulouseFrance Smithsonian Tropical Research Institute PO Box 37012WashingtonDC 20013-7012USA ESALQ Universidade de São Paulo.Avenida Pádua Dias11PiracicabaSP 13418900Brazil

Aims The coastal Brazilian rainforest on white-sand(restinga)ranks among the most fragmented forest types in the tropics,owing to both the patchy distribution of sandy soils and widespread coastal development *** we study the environmental and evolutionary determinants of a forest tree assemblage at a single restinga forest in Southeastern *** also explore the ability of competing hypotheses to explain the maintenance of species diversity in this forest type,which includes contrasting extremes of edaphic conditions associated with flooding *** The study was conducted in a white-sand forest permanent plot of 10.24 ha on the coastal plain of Southeastern *** plot was divided into 256 quadrats of 20×20 m,which were classified into two main edaphic habitats(flooded and drained).Trees with a diameter≥1 cm at breast height were *** assembled DNA sequence data for each of the 116 morphospecies recognized using two chloroplast markers(rbcL and matK).A phylogenetic tree was obtained using the maximum likelihood method,and a phylogenetic distance matrix was produced from an ultrametric *** analyzed similarity in floristic composition and structure between habitats and related them to cross-plot distances using permutation *** model torus shift simulations were performed to obtain a statistical significance level for habitat association for each *** phylogenetic structure for the two habitats and for each 20×20 m quadrat was calculated using the mean phylogenetic distance weighted by species abundance and checked for significance using the standardized effect size generated by 5000 randomizations of phylogenetic tip *** Findings Our results indicate that partitioning among edaphic habitats is important for explaining species distributions and coexistence in restinga *** distributions within the plot were found to be non-random:there was greater floristic similarity within than betwe

关键词： habitat association torus-translation test phylogenetic community structure niche partitioning edaphic condition

Preliminary developments of Miniplate-Type Fuel of U-2.5Zr-7.5Nb Alloy Dispersed and Cladded in Zircaloy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy and Power Engineering 2014年第8期8卷 1409-1414页

作者： natalia Mattar Cantagalli Kelly Cristina Martins Faeda Rafael Witter dias Pais Ana Maria Matildes dos Santos Wilmar Barbosa Ferraz CDTN/CNEN (Centro de desenvolvimento da Tecnologia Nuclear) Belo Horizonte 31270-901 Brazil

Nuclear fuel based on uranium metal alloys is utilized in research and test reactors. For the purpose of the reduction of fuel enrichment, high densities of uranium-235 in this kind of fuel are needed. This can be achieved when uranium alloys are used containing elements such as Zr, Mo and Nb. The construction of fuel element with high-uranium density requires materials with low cross sections for neutron absorption, stability under irradiation and absence of the chemical interactions between the fuel and cladding elements. In case of U-Zr-Nb alloys, Zry （zircaloy） cladding is a better option due to the fact that they have a higher chemical compatibility when compared with the use of aluminum alloys. This study aims to develop plate type nuclear fuel using the U-2.5Zr-7.5Nb alloy dispersed in Zry. Powders of this uranium based alloy and Zry were obtained by hydriding-dehydriding process. These powders were homogenized, compacted in pellet that was sandwiched in plates and frame of Zry. This assembly was hot rolled forming the dispersion fuel miniplate.

关键词： Nuclear fuel plate U-Zr-Nb alloy Zry

Disentangling spatial,environmental and historical effects on tropical forest tree species turnover

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2021年第4期14卷 717-729页

作者： Alisson Borges Miranda Santos Vinicius Andrade Maia Cleber Rodrigo de souza Nathalle Cristine Alencar Fagundes Fernanda Moreira Gianasi Aurelio de Jesus Rodrigues Pais natalia de Aguiar-Campos Gabriela Gomes Pires Diego Teixeira Girardelli Jean Daniel Morel Mariana Caroline Moreira Morelli Felipe de Carvalho Araujo Rubens Manoel dos Santos department of Forestry Sciences Federal University of LavrasUniversity CampusLavrasBrazil Biological Sciences University of the State of Minas GeraisItuiutaba UnitItuiutabaBrazil department of Biology Federal University of LavrasUniversity CampusLavrasBrazil Faculty of Environmental Engineering and Natural Resources Zambeze UniversityChimoioMozambique

Aims We aimed at disentangling the effects of spatial distance,current and past environmental dissimilarity,and their combinations on tree community taxonomic and phylogenetic turnover by addressing the following questions:(i)Is tree community taxonomic and phylogenetic turnover related to the indirect effects of spatial distance via environmental dissimilarity?(ii)Does tree community taxonomic and phylogenetic turnover respond to paleoclimate(Last Glacial Maximum and Mid-Holocene)?Methods The study was carried out in 14 Atlantic rainforest sites in Brazil(20.4 ha sampled)containing 615 tree species from 83 plant *** obtained plot-level geographic coordinates and soil variables and site-level bioclimatic variables in the current,Mid-Holocene and Last Glacial *** used structural equation models with a distance-based approach to(i)test the direct effects of spatial distance and environmental dissimilarity and(ii)test the indirect effects of spatial distance via environmental dissimilarity on taxonomic(Bray–Curtis distance)and phylogenetic turnover(Comdist and Comdistnt distances).Important Findings Our results suggest a weak indirect effect of spatial distance via environmental dissimilarity on taxonomic and phylogenetic *** community turnover was driven by the direct effects of neutral,niche-based and historical ***,we inferred that the paleoclimate(historical processes)promoted the selection of the clades that gave rise to the current flora,while spatial distances(neutral processes)limited the dispersal range of species from the regional pool and environmental conditions(niche-based processes)locally selected the taxa that are able to persist.

关键词： assembly processes phylogenetic communities environmental filtering neutral communities phylogenetic turnover ecological niche paleoclimate effects

Antibiofilm and immunomodulatory resorbable nanofibrous filing for dental pulp regenerative procedures

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bioactive Materials 2022年第10期7卷 173-186页

作者： Mauricio Gonçalves da Costa Sousa Gabriela Conceiçao de Almeida Danilo Cesar Martins Mota Rosiane Andrade da Costa Simoni Campos dias Samuel Nunes Limberger Frank Ko Li Ting Lin Evan FHaney Hashem Etayash Beverlie Baquir Michael J.Trimble Ya Shen Zheng Su Markus Haapasalo Daniel Pletzer Letícia Chaves de souza Glaucia Schuindt Teixeira Renato M.Silva Robert E.W.Hancock Octavio Luiz Franco Taia Maria Berto Rezende Post-Graduation Program in Genomic Sciences and Biotechnology Catholic University of BrasíliaBrasíliaBrazil dentistry Course Catholic University of BrasíliaBrasíliaBrazil Post-Graduation Program in Health Sciences University of BrasíliaBrazil LIMA Chemistry InstituteUniversity of Brasília-UNBBrasíliaBrazil Animal Biology department Campus Darcy RibeiroUniversidade de BrasíliaBrazil department of Materials Engineering Faculty of Applied ScienceUniversity of British ColumbiaVancouverCanada department of Microbiology and Immunology University of British ColumbiaVancouverBCCanada department of Oral Biological and Medical Sciences Faculty of DentistryUniversity of British ColumbiaVancouverCanada department of Microbiology and Immunology University of OtagoDunedinNew Zealand department of Endodontics School of DentistryUniversity of Texas Health Science Center at HoustonHoustonUSA department of Prosthesis Faculty of DentistryRio de Janeiro State UniversityRio de JaneiroBrazil Post-Graduation Program in Biotechnology Catholic University Dom BoscoCampo GrandeMato Grosso do SulBrazil

Multifunctional scaffolds with host defense peptides designed for regenerative endodontics are desirable nanobiotechnological tools for ***,different scaffolds were tested for use during the pulp revascularization process,including poly(vinyl alcohol)-PVA hydrogels or resins,collagen hydrogels and poly(vinyl alcohol)PVA/Chitosan(PVA/CS)*** on time to degradation(21 days),nanofibers were chosen to be incorporated with ciprofloxacin and IDR-1002(each at 50 mg/g).Nanofibers containing ciprofloxacin and IDR-1002 had anti-biofilm activity against Enterococcus faecalis,Staphylococcus aureus and a multispecies oral biofilm,besides anti-inflammatory *** in vivo subcutaneous tissue response to tooth fragments filled with nanofibers demonstrated a pulp-like tissue formation,when compared to empty teeth ***,we designed a strong antimicrobial,immunomodulatory and regenerative candidate for pulp revascularization and regeneration procedures.

关键词： Regenerative endodontics Scaffolds Nanofibers Host defense peptides Ciprofloxacin IDR-1002

Evaluation of functional capacity, body composicion and pulmonary function after bariatric surgery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Health 2013年第8期5卷 47-53页

作者： Flavia Sales Leite Marcela Cangussu Barbalho-Moulim Kadma Karenina Damaceno Soares Fernanda Dultra dias Fabiana Sobral Peixoto-souza Dirceu Costa Uninove—Nove de Julho University Sao PauloBrazil UFSCar—Federal University of Sao Carlos Sao CarlosBrazil

Introduction: Obesity has been considered a global epidemic and a serious public health problem closely related to other diseases. Moreover, obese individuals have limitations in physical capacity and pulmonary function. Weight loss induced by bariatric surgery appears to help reverse this situation. However, questions about physical capacity and lung function, and its relationship with body composition remain to be clarified. Objective: To evaluate the physical capacity, body composition and lung function in women undergoing bariatric surgery. Methods: Twenty five women who underwent bariatric surgery between 6 and 24 months ago, and 10 non-obese women were evaluated for exercise capacity by the six minutes walk test (6 MWT), body composition by bio-electrical impedance analysis and lung function by spirometry and measurement of maximal static respiratory pressures. Results: Subjects with BMI 2 were found to have better physical performance, demonstrated by increased 6 MWT distance, not differing from non-obese women. When compared with non-obese women, there were no significant differences in body composition and lung function. Higher BMI was correlated with shorter distances in 6 MWT. Conclusion: 6 to 24 months after surgery, when the weight loss of patients who underwent bariatric surgery reaches levels considered non-obese, it provides improvement in physical performance to a level similar to that of non-obese patients.

关键词： Obesity Bariatric Surgery Exercise Spirometry Muscle Strength