检索结果-南通市图书馆

Dynapenia in all-cause mortality and its relationship with sedentary behavior in community-dwelling older adults

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sports Medicine and Health Science 2022年第4期4卷 253-259页

作者： Rizia Rocha Silva Lucas lima Galvão joilson Meneguci Douglas de Assis Teles Santos jair Sindra Virtuoso júnior Sheilla Tribess Research Center on Physical Activity Health and AgingDepartment of Sport SciencesInstitute of Health SciencesFederal University of Triângulo MineiroUberabaMinas GeraisBrazil Department of Education University do Estado da BahiaTeixeira de FreitasBahiaBrazil

The aim of the present study was to investigate the relationship of dynapenia combined with sedentary behavior(SB)on the risk of mortality in older adults living in a Brazilian community.A total of 322 participants aged60 years from the ELSIA(Longitudinal Study of Elderly Health in Alcobaça)prospective cohort were *** was diagnosed when the handgrip strength wasjusted models,the dynapenia and the time spent exposed to SB were analyzed in a combined way,the older adults with worse behavior(high SB and dynapenia)had higher risk ratios for mortality(hazard ratio 2.46;95%confidence interval 1.01–5.97)than the best behavior *** adults with dynapenia are at greater risk for all-cause mortality,which is aggravated by the addition of longer exposure to SB.

关键词： Mortality Muscle strength Aging Sedentary behavior

19-year remotely sensed data in the forecast of spectral models of the environment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International journal of Digital Earth 2021年第8期14卷 1040-1066页

作者： Fernando Saragosa Rossi Carlos Antonio da Silva junior joséFrancisco de Oliveira-júnior Paulo Eduardo Teodoro Luciano Shozo Shiratsuchi Mendelson lima Larissa Pereira Ribeiro Teodoro Auana Vicente Tiago Guilherme Fernando Capristo-Silva State University of Mato Grosso(UNEMAT) Alta FlorestaMato GrossoBrazil Department of Geography State University of Mato Grosso(UNEMAT)SinopMato GrossoBrazil cFederal University of Alagoas(UFAL) MaceióAlagoasBrazil dFederal University of Mato Grosso do Sul(UFMS) Chapadão do SulMato Grosso do SulBrazil eAgCenter School of PlantEnvironmentaland Soil SciencesLouisiana State University(LSU)Baton RougeLouisianaUSA fPostgraduate Program in Agronomy Federal University of Mato Grosso(UFMT)SinopMato GrossoBrazil

The aims of this study were:i)to compare no-till areas in two municipalities located in different regions of Brazil,along with the influence on CO_(2)Flux and GPP,and ii)to verify the difference between environmental factors followed by the trends of these variables regarding future scenarios(ARIMA time-series model number).The study was carried out in two areas with different latitudes in the municipalities of Sinop-MT and Passo Fundo-RS,both in Brazil.A time series of 19 years was performed with data acquired by remote sensing from the following satellites:i)Landsat-8(OLI and TIRS),and ii)TERRA/AQUA(MODIS).The results propound that the spectro-temporal variables are directly influenced by soil management and agricultural practices over the observation time,with a satisfactory correlation in future predictions of the variables for the next ten years,in which presented that the variation of GPP and albedo values for the two study sites would gradually increase until 2028 and the temperature remained constant between the range of its seasonality,and CO_(2)Flux tends to decrease in its seasonality,indicating a higher CO_(2) absorption.

关键词： ARIMA numerical modeling remote sensing orbital products tillage

燃料电池式反应器中Pt和Pd中加入Bi用于催化乙醇发电并选择性联产醋酸盐

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

燃料化学学报 2021年第10期49卷 1540-1548页

作者： lima F.S. Fontes E.H. Nandenha j. de Souza R.F.B. Neto A.O. Instituto de Pesquisas Energéticas e Nucleares IPEN/CNEN-SPCEP 05508-900 São PauloSPBrazil

直接乙醇燃料电池作为便携式移动电源受到越来越多的关注,如乙醇能量密度高、可再生、无毒、清洁、便于储存和运输等优点。然而,乙醇燃料电池的研究也面临一些严重问题,其中C−C键断裂是最为挑战的问题之一。近年来有报道表明,乙醇的完... 详细信息

直接乙醇燃料电池作为便携式移动电源受到越来越多的关注,如乙醇能量密度高、可再生、无毒、清洁、便于储存和运输等优点。然而,乙醇燃料电池的研究也面临一些严重问题,其中C−C键断裂是最为挑战的问题之一。近年来有报道表明,乙醇的完全氧化(包含C−C键断裂过程)并没有显示出燃料电池效率的增加,相反乙醇不完全氧化的催化剂会导致更明显的催化电流增加。同时金属Bi掺杂会对催化剂产生电子效应和几何效应并有效增加碱性体系中催化剂的活性位中心和抗CO中毒能力。因此,本工作将铋掺杂在铂和钯中制备出PtBi/C和PdBi/C作为乙醇燃料电池催化剂,同时研究Bi掺杂催化剂对乙醇燃料电池性能以及乙醇的不完全氧化产物醋酸盐的影响,为乙醇燃料电池电-化学品联产提供一定的依据。以硼氢化钠为还原剂,Vulcan XC-72(Cabot)导电炭为载体制备了Pt/C、Pd/C、PtBi/C和PdBi/C(20%质量比)炭载催化剂,其中PtBi和PdBi原子比均为95∶5。首先将金属前驱体溶于H_(2)O/异丙醇溶液(50/50,体积比)中,加入Vulcan XC-72导电炭黑充分混合,然后加入硼氢化钠在常温常压下充分反应,过滤洗涤干燥备用。其次,对所制备的催化剂进行TEM、XRD、XPS、电化学以及光谱电化学进行表征和测试。电化学、光谱电化学在三电极电解池中进行,将所制备的催化剂分散在超薄多孔电极上制备成工作电极,对电极为Pt片电极,参比电极为Ag/AgCl电极。电解液为碱性1 mol/L KOH的乙醇溶液,在电化学工作站上进行CV、LSV扫描以及在不同电位下测试溶液的ATR-FTIR谱。最后,燃料电池测试在一个面积为5 cm2的单电池上进行,阳极为2 mol/L乙醇+3 mol/L KOH溶液,流量为2 mL/min,阴极通入氧气,并研究催化剂的构成及性能对电池性能的影响。采用硼氢化钠还原法合成Pt/C、PtBi(95∶5)/C、Pd/C和PdBi(95∶5)/C。Pd/C和PdBi/C的晶体结构呈现FCC特征,Pt/C和PtBi/C的晶体结构也呈现FCC特征。XRD也揭示了铋原子对Pt晶体结构的影响。在1 mol/L KOH溶液中,异位XPS和循环伏安法显示这些金属具有较高的氧化态。透射电镜显示Pd/C有一定的纳米粒子聚集,PdBi/C有一定的有序结构。红外光谱(ATR-FTIR)结果表明,Bi效应由于吸附能力较弱,抑制了碳酸盐的生成,增加了醋酸盐的生成。由于醋酸盐优先生成,且不被碳酸盐离子毒害,PtBi/C具有最佳的电化学和DEFC性能。通过在Pt和Pd掺杂金属Bi制备具有电子调控的双金属炭载PtBi(95∶5)/C和PdBi(95∶5)/C催化剂,以增强乙醇氧化反应催化氧化过程。透射电镜(TEM)和X射线光电子能谱(XPS)结果表明,Bi含量不影响PdBi纳米颗粒的尺寸,但会影响PtBi纳米颗粒的尺寸。X射线衍射分析表明,Bi掺杂改变了Pt晶体结构中的晶格参数。此外,ATR-FTIR结果表明,碳酸盐的形成受到抑制,乙酸盐产量增加。极化曲线和功率密度曲线结果表明,PtBi/C催化剂具有更高的功率密度,几乎是Pt/C的6倍。在线性扫描伏安实验中,PtBi/C具有最高的电流密度(44 mW/cm2)和最低的起始电位(−0.6 V)。在电流-时间实验中,它也具有最高的最终电流密度。因此,在Pt和Pd中掺杂铋催化剂被证明是一种很有前途的燃料电池发电和醋酸盐的联产方法。

关键词：甲醇氧化反应 Bi掺杂电-化学品联产

Oral administration of S-nitroso-N-acetylcysteine prevents the onset of non alcoholic fatty liver disease in rats

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World journal of Gastroenterology 2006年第12期12卷 1905-1911页

作者： Claudia PMS de Oliveira Fernanda I Simplicio Vicencia MR de lima Katia Yuahasi Fabio P Lopasso Venancio AF Alves Dulcinéia SP Abdalla Flair j Carrilho Francisco RM Laurindo Marcelo G de Oliveira University of Sāo Paulo School of Medicine Department of Gastroenterology Saoo Paulo SP Brazil School of Medicine Department of Pathology Sāo Paulo SP Brazil University of So Paulo Medical School Heart Institute InCor Sāo Paulo SP Brazil University of Sāo Paulo School of Pharmaceutical Sciences Department of Clinical and Toxicological Analysis Sao Paulo SP Brazil State University of CamDinas. Chemistry Department. Campinas. SE Brazil

AIM： To evaluate the potential of S-nitroso-N-acetylcysteine （SNAC） in inhibition of lipid peroxidation and the effect of oral SNAC administration in the prevention of nonalcoholic fatty liver disease （NAFLD） in an animal model.METHODS： NAFLD was induced in Wistar male rats by choline-deficient diet for 4 wk. SNAC-treated animals （n=6）（1.4 mg/kg/day of SNAC, orally） were compared to 2 control groups： one （n=6） received PBS solution and the other （n=6） received NAC solution （7 mg/kg/d）. Histological variables were semiquantitated with respect to macro and microvacuolar fat changes, its zonal distribution, foci of necrosis, portal and perivenular fibrosis, and inflammatory infiltrate with zonal distribution. LOOHs from samples of liver homogenates were quantified by HPLC. Nitrate levels in plasma of portal vein were assessed by chemiluminescence. Aqueous low-density lipoprotein （LDL） suspensions （200 pg protein/mL） were incubated with CuCl2 （300 μmol/L） in the absence and presence of SNAC （300 μmol/L） for 15 h at 37 ℃ Extent of LDL oxidation was assessed by fluorimetry. Linoleic acid （LA）（18.8 μmol/L） oxidation was induced by soybean lipoxygenase （SLO）（0.056 μmol/L） at 37 ℃ in the presence and absence of N-acetylcysteine （NAC） and SNAC （56 and 560 pmol/L） and monitored at 234 nm. RESULTS： Animals in the control group developed moderate macro and microvesicular fatty changes in periportal area. SNAC-treated animals displayed only discrete histological alterations with absence of fatty changes and did not develop liver steatosis. The absence of NAFLD in the SNAC-treated group was positively correlated with a decrease in the concentration of LOOH in liver homogenate, compared to the control group （0.7±0.2 nmol/mg vs 3.2±0.4 nmol/mg protein, respectively, P〈0.05）, while serum levels of aminotransferases were unaltered. The ability of SNAC in preventing lipid peroxidation was confirmed in in vitro experiments using LA and LDL as model substrates. CONCLUSION： Oral

关键词： Nitric oxide S-nitroso-N-acetylcysteine Oxidative stress Nonalcoholic fatty liver disease

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 Chemistry 2022年第10期31卷 88-113,I0003页

作者： Magno B.Costa Moisés A.de Araújo Marcos V.de lima Tinoco juliana F.de Brito Lucia H.Mascaro Departamento de Química Universidade Federal de São CarlosRodovia Washington Luizkm 235São CarlosSão Paulo 13565-905Brazil Instituto de Química de São Carlos Universidade de São PauloAvenida Trabalhador Sancarlense400São CarlosSão Paulo 13566-590Brazil Instituto de Química Universidade Estadual PaulistaRua Professor Francisco Degnis/nAraraquaraSão Paulo 14800-900Brazil

This review shows the importance of WO_(3)photoanode as a potentially low-cost,efficient,stable,and photoactive material for light-driven water *** such,this manuscript aims to review the most recent publications regarding the strategies to improve the phoelectroactivity of WO_(3)films for water *** addition,this review aims to graphically highlight and discuss the general trendings of the photocurrent density response and stability test of the recent outstanding studies in the literature for photoelectrochemical water splitting *** strategies covered in this review will not only concern the WO_(3)morphology and crystal plane growth,but also the many arrangements possibilities to improve the WO_(3)efficiency for water photoelectrooxidation,such as defect engineering based on oxygen vacancies,doping,decorations,and homo and *** these strategies are compared by the photocurrent density results and by the stability of these *** best results in this sense were observed in cases where the use of heterojunction was applied together with a desired morphology and crystal plane of the WO_(3)***,the modifications that caused a decrease in the photocurrent density reaching values that are even lower than the pure WO_(3)were also *** this way,this review intends to improve the knowledge about the synthesis and design of WO_(3)photoanodes to further obtain an efficient photocatalyst to minimize the recombination losses or losses across the interfaces and improve the photoelectroactivity for water splitting in the large-scale application.

关键词： Solar energy H_(2)production N-type semiconductor Photoelectrode design Oxygen evolution reaction

Dynamics in the emergence of dormant and non-dormant herbaceous species from the soil seed bank from a Brazilian dry forest

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

journal of Plant Ecology 2020年第3期13卷 256-265页

作者： josé Djalma de Souza Bruno Ayron de Souza Aguiar Danielle Melo dos Santos Vanessa Kelly Rodrigues de Araujo júlia Arruda Simões juliana Ramos de Andrade Elcida de lima Araújo Departamento de Biologia Universidade Federal Rural de PernambucoRecifePernambucoBrazil2Universidade Federal de Pernambuco-Centro Acadêmico de VitóriaPernambucoBrazil

Aims In dry tropical forests,herbaceous species may have dormancy mechanisms and form persistent and transient seed banks in the *** acquired,these mechanisms are efficient for the establishment and survival of these herbs,especially in forests with unpredictable climates,such as the ***,our objective was to verify whether the studied herbaceous species adopt the physical dormancy mechanism and how these natural barriers are overcome,to understand the temporal dynamics existing in the soil seed bank from a Brazilian dry tropical *** Seeds of five native herbaceous species from the Caatinga forests were selected and submitted to pre-germinative treatments for verifying the presence of physical *** collected soil samples in the rainy and dry seasons for four consecutive years and monitored the emergence of the selected herbaceous in the *** verified the differences in germination and seed bank emergence in the soil by generalized linear *** Findings The presence and absence of physical dormancy were observed in seeds from Caatinga herbaceous *** found intraspecific and interspecific differences in the herbaceous emergence from soil seed banks between years and climatic *** perennial herbs,consecutive lack of emergence between seasons and years was frequent,which suggests a direct relationship with the mechanism of physical dormancy and the environmental conditions necessary to overcome integument *** these species,seed dimorphism and dormancy may confer additional advantages to their ***,presenting intermediate levels of physical dormancy in an annual species may be an evolutionary adjustment to rainfall *** contrast,we found that the annual herb without dormancy is more sensitive to seasonal and interannual climate changes,as evidenced by the increase and significant reduction of its emergence in the soil seed *** differences acquired evoluti

关键词： establishment herbaceous species physical dormancy seed bank seed germination semiarid

Five Colletotrichum species are responsible for mango anthracnose in northeastern Brazil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fungal Diversity 2013年第4期61卷 75-88页

作者： Nelson B.lima Marcus Vinicius de A.Batista Marcos A.De Morais jr Maria A.G.Barbosa Sami j.Michereff Kevin D.Hyde Marcos P.S.Câmara Departamento de Agronomia Universidade Federal Rural de Pernambuco52171-900 RecifeBrazil Departamento de Genética Universidade Federal de Pernambuco50732-970 RecifeBrazil Embrapa Semiárido 56302-970 PetrolinaBrazil Institute of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand

Colletotrichum species are the most important and widespread form of decay affecting mango fruit *** this study,Colletotrichum species associated with fruit anthracnose isolated from mango in northeastern Brazil were subject to molecular and morphological *** partial sequences of the glyceraldehyde-3-phosphate dehydrogenase gene of 143 Colletotrichum isolates was amplified,as an initial measure of genetic diversity.A subset of 47 isolates,selected to represent the range of genetic diversity and geographic origin,were further sequenced using the partial actin,β-tubulin,calmodulin,glutamine synthetase genes and rDNA-ITS *** multilocus sequence analysis,together with a critical examination of the phenotypic characters,revealed four previously described species(Colletotrichum asianum,Colletotrichum fructicola,Colletotrichum tropicale and Colletotrichum karstii)and one new *** new species is introduced as Colletotrichum dianesei and formally described,illustrated and compared with similar *** *** and *** have previously been reported from mango,while the other species represent the first report associated with the mango fruits *** species are reported for the first time associated with the mango fruits in Brazil.

关键词： Multilocus phylogeny Morphology New species Plant disease

Species of Lasiodiplodia associated with mango in Brazil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fungal Diversity 2013年第4期61卷 181-193页

作者： Marília W.Marques Nelson B.lima Marcos Antônio de Morais jr Maria Angélica G.Barbosa Breno O.Souza Sami j.Michereff Alan j.L.Phillips Marcos P.S.Câmara Departamento de Agronomia Universidade Federal Rural de Pernambuco52171-900 RecifeBrazil Departamento de Genética Universidade Federal de Pernambuco50732-970 RecifeBrazil Embrapa Semi-Árido 56302-970 PetrolinaBrazil Centro de Recursos Microbiológicos Departamento de Ciências da VidaFaculdade de Ciências e TecnologiaUniversidade Nova de Lisboa2829-516 CaparicaPortugal

Mango(Mangifera indica)is a major tropical fruit species cultivated in *** objective of this study was to identify species of Lasiodiplodia associated with dieback and stem-end rot of mango in the semi-arid region of Northeastern Brazil,and compare the species in relation to mycelial growth,pathogenicity and virulence.A total of 120 isolates of Lasiodiplodia were used and identifications were made using a combination of morphology and phylogenetic analysis based on partial translation elongation factor 1-αsequence(EF1-α)and internal transcribed spacers(ITS).The following species were identified:Lasiodiplodia crassispora,***,***,***,***,*** and Lasiodiplodia sp..Lasiodiplodia theobromae was the most frequently isolated species,which represented 41%of all the *** this species had been previously reported on mango in Brazil,while the other species represent the first report associated with mango tree diseases in this *** crassispora is reported for the first time associated with mango diseases *** were significant differences in mycelial growth rates among the Lasiodiplodia species and also in the optimum temperature for *** species of Lasiodiplodia were pathogenic on mango *** were significant differences in virulence among the species,wherein *** and Lasiodiplodia *** the most virulent,while the least virulent were ***,***,*** and ***.

关键词： Botryosphaeriaceae Mangifera indica ITS EF1-α Phylogeny Virulence

Usher syndrome:Genetic diagnosis and current therapeutic approaches

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World journal of Otorhinolaryngology 2024年第1期11卷 1-17页

作者： Beatriz Rocha Cuzzuol jonathan Santos Apolonio Ronaldo Teixeira da Silva júnior Lorena Sousa de Carvalho Luana Kauany de SáSantos Luciano Hasimoto Malheiro Marcel Silva Luz Mariana Santos Calmon Henrique de lima Crivellaro Fabian Fellipe Bueno Lemos Fabrício Freire de Melo Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil

Usher Syndrome(USH)is the most common deaf-blind syndrome,affecting approximately 1 in 6000 people in the deaf *** genetic condition is characterized by a combination of hearing loss(HL),retinitis pigmentosa,and,in some cases,vestibular *** the subtypes of USH,USH type 1 is considered the most severe form,presenting profound bilateral congenital deafness,vestibular areflexia,and early onset *** type 2 is the most common form,exhibiting congenital moderate to severe HL for low frequencies and severe to profound HL for high ***,type 3 is the rarest,initially manifesting mild symptoms during childhood that become more prominent in the first decades of *** dual impact of USH on both visual and auditory senses significantly impairs patients'quality of life,restricting their daily activities and interactions with *** date,9 genes have been confirmed so far for USH:MYO7A,USH1C,CDH23,PCDH15,USH1G,USH2A,ADGRV1,WHRN and *** genes are inherited in an autosomal recessive manner and encode proteins expressed in the inner ear and retina,leading to functional *** non-genetic methods can assist in patient triage and disease extension evaluation,genetic and molecular tests play a pivotal role in providing genetic counseling,enabling appropriate gene therapy,and facilitating timely cochlear implantation(CI).The CRISPR/Cas9 system and viral-based gene replacement therapy have recently emerged as highly promising techniques for treating *** drug therapy,PTC-124 and Nb54 have been identified as promising drug interventions for genetic HL in ***,CI has proven to be critical in the restoration of *** review aims to summarize the genetic and molecular diagnosis of USH and highlight the importance of early diagnosis in Cuzzuol BR et *** and current treatments of USH WjO https://*** 2 january 19,2024 Volume 11 Issue 1 guiding appropriate treatment strategies and i

关键词： Usher syndromes Hearing loss Retinitis pigmentosa Diagnosis Genetic therapies Cochlear implantation Quality of life