检索结果-南通市图书馆

Tropical tree community composition and diversity variation along a volcanic elevation gradient

Journal of Mountain Science 2022年第12期19卷 3475-3486页

作者： Ruben MARTINEZ-CAMILO Manuel MARTINEZ-MELENDEZ Nayely MARTINEZ-MIELENDEZ Derio Antonio JIMENEZ-LOPEZ mauricio jose-rios Unidad Villa Corzo Facultad de IngenieríaUniversidad de Ciencias y Artes de Chiapas30520 Villa CorzoChiapasMexico Instituto de Ciencias Biológicas Universidad de Ciencias y Artes de Chiapas29039 Tuxtla GutiérrezChiapasMexico Eizia A.C. 29045 Tuxtla GutiérrezChiapasMexico Departamento de Conservación de la Biodiversidad El Colegio de la Frontera Sur29290 San Cristóbal de las CasasChiapasMexico Orquidiario y Jardín Botánico de Comitán Secretaría de Medio Ambiente e Historia Natural30106 Comitán de DomínguezChiapasMexico Instituto de Investigación en Gestión de Riesgos y Cambio Climático Universidad de Ciencias y Artes de Chiapas29039 Tuxtla GutiérrezChiapasMexico

Unraveling the factors that determine variation of diversity in tropical mountain systems is a topic for debate in plant *** is especially true in areas where topography is complex due to volcano elevational gradients and where forests are vulnerable to human *** this study we used a set of climatic(temperature,rainfall,and radiation solar),topographic(elevation,slope aspect,and slope orientation)and human disturbance variables to determine their effect on diversity and composition patterns of a tree community,considering three slope aspects of a tropical volcano in southeastern *** sampled trees in seventy 0.1-ha plots distributed on three slope aspects of the Tacanávolcano along an elevational gradient of 1500 to 2500 *** determined diversity patterns(general tree richness,exponential of Shannon index,and pioneer species richness)with linear regression models,and for beta diversity,we used a dissimilarity index(within and between elevational bands 100 m wide).The effect of a set of environmental and human disturbance variables on tree diversity and community composition was analyzed with general linear models and multivariate analyses,*** registered 2,949 individual trees belonging to 176 species and *** average species richness and alpha diversity per plot were 13(standard deviation±6)and 9(±5),*** tree richness and alpha diversity increased in the middle part(unimodal patterns)of the elevational gradient,but pioneer species richness decreased linearly with *** variance explained by general linear models was greater in richness(32%)than in alpha diversity(25.3%).The most important predictor variables were temperature(elevational gradient),which explained the unimodal pattern(richness and alpha diversity increase at intermediate levels of temperature),and slope orientation,which explained the increase in richness and alpha diversity toward the geographic *** temperature had a signific

关键词： Composition Environmental gradient Tree diversity patterns Tropical humid cloud forest Tropical volcanoes

来源：

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

Fast synthesis of gold nanoparticles by cold atmospheric pressure plasma jet in the presence of Au^(+) ions and a capping agent

引用

Plasma Science and Technology 2024年第7期26卷 108-115页

作者： Tatiana HABIB José mauricio A.CAIUT Bruno CAILLIER Laboratoire Diagnostics des Plasmas Hors Equilibre(DPHE) Universitéde ToulouseINU ChampollionAlbi 81000France Department of Chemistry The Nanomaterials and Luminescent Systems GroupFaculty of PhilosophyScience and Letters at Ribeirão PretoUniversity of São PauloRibeirão Preto-SP 14040-901Brazil

Homogeneous gold nanoparticles were synthesized under atmospheric pressure using a nonthermal helium plasma jet in a single-step process.A current power supply was used to generate the plasma discharge rich in diverse reactive *** species induce rapid chemical reactions responsible for the reduction of the gold salts upon contact with the liquid *** this study,spherical and monodispersed gold nanoparticles were obtained within 5 min of plasma exposure using a solution containing gold(Ⅲ)chloride hydrate(HAuCl_(4))as a precursor and polyvinylpyrrolidone(PVP)as a capping agent to inhibit *** formation of these metal nanoparticles was initially perceptible through a visible change in the sample's color,transitioning from light yellow to a red/pink *** was subsequently corroborated by UVvis spectroscopy,which revealed an optical absorption in the 520-550 nm range for Au NPs,corresponding to the surface plasmon resonance(SPR)*** investigation into the impact of various parameters,including plasma discharge duration,precursor and capping agent concentrations,was carried out to optimize conditions for the formation of well-separated,spherical gold *** light scattering(DLS)was used to measure the size of these nanoparticles,transmission electron microscopy(TEM)was used to observe their morphology and X-ray diffraction(XRD)was also employed to determine their crystallographic *** results confirm that homogeneous spherical gold nanoparticles with an average diameter of 13 nm can be easily synthesized through a rapid,straightforward,and environmentally friendly approach utilizing a helium atmospheric pressure plasma.

关键词： gold nanoparticles non-thermal plasma jet helium DBD

来源：

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

Could school programs based on social-emotional learning prevent substance abuse among adolescents?

引用

World Journal of Psychiatry 2024年第8期14卷 1143-1147页

作者： João mauricio Castaldelli-Maia Nicolas Kohatsu Matakas Department of Neuroscience Medical SchoolFMABC University CenterSão Paulo 09060870SPBrazil Department of Substance Use Disorders Perdizes Institute-HCFMUSPSao Paulo 05021001SPBrazil

In this editorial,we comment on the article Adolescent suicide risk factors and the integration of social-emotional skills in school-based prevention programs by Liu et *** the article focused on the issue of suicide and social-emotional learning programs as a possible intervention,we here discuss evidence of other reported outcomes and if it could be an effective way to prevent substance abuse among adolescents.

关键词： Social-emotional learning Substance use Adolescent Student Prevention Mental health

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A review of recent advances of kesterite thin films based on magnesium,iron and nickel for photovoltaic application:insights into synthesis,characterization and optoelectronic properties

引用

Clean Energy 2024年第2期8卷 217-238页

作者： Nelson mauricio Espinel Pérez Enrique Vera López Jairo Alberto Gómez Cuaspud Juan Bautista Carda Castelló Grupo de Investigación en Integridad y Evaluación de Materiales(GIEM).Instituto para la Investigación e Innovación en Ciencia y Tecnología de Materiales(INCITEMA).Universidad Pedagógica y Tecnológica de Colombia Av.Central del Norte 39-115.Tunja-BoyacáColombia Servicio Nacional de Aprendizaje(Sena).Centro Minero.Vereda MorcáSector Batá.Sogamoso-Boyacá Colombia Universidad Jaume I.Grupo de Química Inorgánica y Orgánica.Castellón de la Plana Campus del Riu Sec.Castellón de la PlanaEspaña

This review emphasizes the recent advancements and prospects of thin-film kesterite-based photovoltaic(PV)applications using magnesium,iron and *** quest for novel materials employed in solar cells has resulted in incorporating these elements into the composition of kesterite as substitutes or modifiers(dopants)for *** integration has induced notable repercussions on the structural,optoelectronics and morphological properties,which are *** first section of this paper offers a comprehensive review of the general characteristics of kesterite *** crucial materials exhibit a high absorption coefficient(104 cm-1)and an optical band gap of 1.0-1.8 ***,they are free of critical raw materials,non-toxic and *** second section depicts the substitution or modification of zinc by magnesium in ***,this paper provides a comprehensive review of the quaternary and pentanary systems Cu_(2)MgSn(S,Se)_(4) and Cu_(2)Zn_(1-x)Mg_(x)SnS_(4),highlighting their advantages and *** the last section,a review of the quaternary or pentanary systems is conducted,namely Cu_(2)ZnxFe_(1-x)SnS_(4) and Cu_(2)ZnxNi_(1-x)SnS_(4),along with their effects on optoelectronic *** conclusion,various methods for obtaining modified or substituted kesterite materials using magnesium,iron and nickel have demonstrated sustainability,scalability for industrial production and potential candidacy as substitutes for conventional PV *** prospects for pentanary materials(Cu_(2)Zn_(1-x)Mg_(x)SnS_(4),Cu_(2)Zn_(1-x)FexSnS_(4) and Cu_(2)Zn_(1-x)NixSnS_(4))are to overcome the efficiency record of kesterite reported in 2014,which was 12.6%for Cu_(2)ZnSn(S,Se)_(4),and to enhance its optoelectronic properties through synthesis conditions that comply with the principles of green chemistry.

关键词： kesterite thin film magnesium iron nickel substitutes or modifiers novel materials sustainability

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Low-power SiPM readout BETA ASIC for space applications

引用

Nuclear Science and Techniques 2024年第3期35卷 153-169页

作者： Anand Sanmukh Sergio Gómez Albert Comerma Joan mauricio Rafel Manera Andreu Sanuy Daniel Guberman Roger Catala Albert Espinya Marina Orta Oscar de la Torre David Gascon Departament de Física Quàntica i Astrofísica(FQA) Institut de Ciències del Cosmos(ICCUB)Universitat de Barcelona(UB)08028 BarcelonaSpain Institut d’Estudis Espacials de Catalunya(IEEC) 08034 BarcelonaSpain Electronics Department Serra Hunter fellow at Polytechnic University of Catalonia(UPC)08019 BarcelonaSpain

The BETA application-specific integrated circuit(ASIC)is a fully programmable chip designed to amplify,shape and digitize the signal of up to 64 Silicon photomultiplier(SiPM)channels,with a power consumption of approximately~1 mW/*** to its dual-path gain,the BETA chip is capable of resolving single photoelectrons(phes)with a signal-to-noise ratio(SNR)>5 while simultaneously achieving a dynamic range of~4000 ***,BETA can provide a cost-effective solution for the readout of SiPMs in space missions and other applications with a maximum rate below 10 *** this study,we describe the key characteristics of the BETA ASIC and present an evaluation of the performance of its 16-channel version,which is implemented using 130 nm *** ASIC also contains two discriminators that can provide trigger signals with a time jitter down to 400 ps FWHM for 10 *** linearity error of the charge gain measurement was less than 2%for a dynamic range as large as 15 bits.

关键词： Radiation detectors Silicon photomultipliers Photon sensors Front-end electronics Mixed-mode ASICs Space technology

来源：

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

DNA metabarcoding reveals seasonal changes in diet composition across four arthropod-eating lizard species(Phrynosomatidae:Sceloporus)

引用

Integrative Zoology 2024年第3期19卷 480-495页

作者： mauricio HERNÁNDEZ Stephanie HEREIRA-PACHECO Antton ALBERDI Aníbal H.DÍAZ DE LA VEGA-PÉREZ Arturo ESTRADA-TORRES Sergio ANCONA Yendi E.NAVARRO-NOYA Doctorado en Ciencias Biológicas Centro Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMexico Estación Científica La Malinche Centro Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMexico Center for Evolutionary Hologenomics The Globe InstituteUniversity of CopenhagenCopenhagenDenmark Consejo Nacional de Ciencia y Tecnología-Centro Tlaxcala de Biología de la Conducta Universidad Autónoma de TlaxcalaTlaxcalaMexico Departamento de Ecología Evolutiva Instituto de EcologíaUniversidad Nacional Autónoma de MéxicoMexico CityMexico Laboratorio de Interacciones Bióticas Centro de Investigación en Ciencias BiológicasUniversidad Autónoma de TlaxcalaSan Felipe IxtacuixtlaTlaxcalaMexico

Diet composition and its ecological drivers are rarely investigated in coexisting closely related *** used a molecular approach to characterize the seasonal variation in diet composition in four spiny lizard species inhabiting a mountainous *** metabarcoding revealed that the lizards Sceloporus aeneus,***,***,and *** mostly consumed arthropods of the orders Hemiptera,Araneae,Hymenoptera,and *** terrestrial lizards *** and *** mostly predated ants and spiders,whereas the arboreal–saxicolous *** and saxicolous *** largely consumed grasshoppers and *** taxonomic and phylogenetic diversity of the prey was higher during the dry season than the rainy season,likely because reduced prey availability in the dry season forced lizards to diversify their diets to meet their nutritional *** and phylogenetic composition varied seasonally depending on the species,but only dietary composition varied with *** dietary turnover was greater in *** than in ***,suggesting site-specific seasonal variability in prey availability;no other differences among species were ***,which lives at the highest altitude in our study site,displayed interseasonal variation in diet *** differences were correlated with the species’feeding strategies and elevational distribution,which likely contributed to the coexistence of these lizard species in the studied geographic area and beyond.

关键词： arthropod-eating lizards diet breadth environmental barcoding mountainous ecosystem seasonal dietary shifts

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A multi-platform analysis of human gingival crevicular fluid reveals ferroptosis as a relevant regulated cell death mechanism during the clinical progression of periodontitis

引用

International Journal of Oral Science 2024年第2期16卷 265-279页

作者： Alfredo Torres M.Angélica Michea Ákos Végvári Marion Arce Valentina Pérez Marcela Alcota Alicia Morales Rolando Vernal mauricio Budini Roman A.Zubarev Fermín E.González Laboratory of Experimental Immunology&Cancer Faculty of DentistryUniversity of ChileSantiagoChile Department of Conservative Dentistry Faculty of DentistryUniversity of ChileSantiagoChile Division of Chemistry I Department of Medical Biochemistry and BiophysicsKarolinska InstitutetStockholmSweden Periodontal Biology Laboratory Faculty of DentistryUniversidad de ChileSantiagoChile Laboratory of Cellular and Molecular Pathology Institute for Research in Dental SciencesFaculty of DentistryUniversity of ChileSantiagoChile

Ferroptosis is implicated in the pathogenesis of numerous chronic-inflammatory diseases,yet its association with progressive periodontitis remains *** investigate the involvement and significance of ferroptosis in periodontitis progression,we assessed sixteen periodontitis-diagnosed *** progression was clinically monitored over twelve weeks via weekly clinical evaluations and gingival crevicular fluid(GCF)collection was performed for further *** metrics,proteomic data,in silico methods,and bioinformatics tools were combined to identify protein profiles linked to periodontitis progression and to explore their potential connection with *** western blot analyses validated key ***,a single-cell RNA sequencing(scRNA-seq)dataset(GSE164241)for gingival tissues was analyzed to elucidate cellular dynamics during periodontitis *** progression was identified as occurring at a faster rate than traditionally *** samples from progressing and non-progressing periodontal sites showed quantitative and qualitatively distinct proteomic *** addition,specific biological processes and molecular functions during progressive periodontitis were revealed and a set of hub proteins,including SNCA,CA1,HBB,SLC4A1,and ANK1 was strongly associated with the clinical progression status of ***,we found specific proteins-drivers or suppressors-associated with ferroptosis(SNCA,FTH1,HSPB1,CD44,and GCLC),revealing the co-occurrence of this specific type of regulated cell death during the clinical progression of ***,the integration of quantitative proteomic data with scRNA-seq analysis suggested the susceptibility of fibroblasts to *** analyses reveal proteins and processes linked to ferroptosis for the first time in periodontal patients,which offer new insights into the molecular mechanisms of progressive periodontal *** findings may le

关键词： finding progression faster

来源：

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

Common interacting genetic variation shapes susceptibility to type 1 diabetes in a Colombian Caribbean community:In search of shared genetic markers

引用

Genes & Diseases 2024年第4期11卷 106-108页

作者： Gloria Garavito-De Egea Alex Dominguez-Vargas Jorg e l.Velez Gustavo Aroca Luis Fagng Elkin Navarro-Quiroz Zilac Espitaleta Kenny Del Toro-Camargo Leticia Martinez-Ariza Tatiana Gonzalez-Vargas Susana Garcia mauricio Arcos-Burgos Eduardo Egea Universidad del Norte Division Ciencias de la SaludBarranquillaColombia Universidad Simon Bolivar Facultad de Ciencias de la SaludBarranquillaColombia Clinica de la Costa Grupo de Investigacion en NefrologiaBarranquillaColombia Universidad de Antioquia Grupo de Investigacion en Psiquiatria(GIPSI)Departamento de PsiquiatriaInstituto de Investigaciones MedicasFacultad de MedicinaMedellinColombia

Genome-wide association studies(GWASs)have identified hundreds of loci across the human genome conferring susceptibility to autoimmune diseases(AIDs),some of which are shared between more than two ***,this univariate ... 详细信息

关键词： susceptibility diseases diabetes

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Exclusive breastfeeding greater than 50%, success of education in a university hospital in Bogotá: Case-control study

引用

World Journal of Clinical Pediatrics 2024年第1期13卷 23-30页

作者： Marcela Murillo Galvis Sofia Ortegon Ochoa Clara Eugenia Plata García Maria Paula Valderrama Junca Dayanna Alejandra Inga Ceballos Daniel mauricio Mora Gómez Claudia M Granados Martin Rondón Department of Pediatrics Hospital Universitario San IgnacioBogotá110111Colombia Department of Clinical Epidemiology and Biostatistics Pontifica Universidad JaverianaBogotá110111Colombia

BACKGROUND Maintenance rates of exclusive breastfeeding(EBF)worldwide are low,thus,one of the objectives of the summary of policies on breastfeeding(BF)in world nutrition goals for 2025 are that at least 50%of infants under six months of age receive EBF that *** Objective of this study is to document the rates of EBF in children born in San Ignacio University Hospital(HUSI)and identify factors associated with *** To document the percentages of EBF in those that were born at HUSI and identify factors associated to their *** This is a study of cases and controls in an analytic,retrospective cohort that took children born alive between January 2016 and January 2019 at HUSI located in the city of Bogotá,*** Receiving information about BF at HUSI was able to maintain EBF up until 4 mo(OR=1.65;95%CI:1.02-2.66).The presence of gynecologic and obstetric comorbidities(OR=0.32;95%CI:0.12-0.83),having mastitis(OR=0.56;95%CI:0.33-0.94),and receiving information from mass media(OR=0.52;95%CI:0.31-0.84)are factors associated with not maintaining *** Receiving education at a Women-and Child-Friendly Institution was the only significant factor to achieve EBF until 4 mo,with a frequency greater than the one reported in the country,which matches multiple studies where counseling and individualized support on BF achieve this *** about BF and early detection of obstetric/gynecologic complications must be strengthened among the healthcare staff in charge of mothers during ***,strategies must be promoted to continue BF such as creating milk banks with the objective of increasing BF rates even when mothers return to work.

关键词： Breastfeeding Women-and Child-Friendly Institutional Strategy Strategies Adherence Education

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impact of STAT-signaling pathway on cancer-associated fibroblasts in colorectal cancer and its role in immunosuppression

引用

World Journal of Gastrointestinal Oncology 2024年第5期16卷 1705-1724页

作者： Damián Sánchez-Ramírez Mónica G Mendoza-Rodríguez Omar R Alemán Fernando A Candanedo-González Miriam Rodríguez-Sosa Juan JoséMontesinos-Montesinos mauricio Salcedo Ismael Brito-Toledo Felipe Vaca-Paniagua Luis I Terrazas Unidad de Investigacion en Biomedicina Facultad de Estudios Superiores IztacalaUniversidad Nacional Autonoma de MexicoTlalnepantla 54090Estado de MexicoMexico Department of Biology Facultad de QuimicaUniversidad Nacional Autonoma de MexicoCiudad UniversitariaMexico City 04510Mexico Department of Pathology National Medical Center Century XXIInstituto Mexicano del Seguro SocialMexico City 06720Mexico Laboratorio de Células Troncales Mesenquimales Unidad de Investigación Médica en Enfermedades OncológicasHospital de Oncología Centro Medico Nacional Siglo XXIInstituto Mexicano del Seguro SocialMexico City 06720Mexico Unidad de Investigacion en Biomedicina y Oncologia Genomica Instituto Mexciano del Seguro SocialMexico City 07300Mexico Servicio de Colon y Recto Hospital de Oncología Centro Medico Nacional Siglo XXIInstituto Mexicano del Seguro SocialMexico City 06720Mexico Laboratorio Nacional en Salud Facultad de Estudios Superiores IztacalaUniversidad Nacional Autónoma de MéxicoTlalnepantla 54090Estado de MexicoMexico

Colorectal cancer(CRC)remains one of the most commonly diagnosed and deadliest types of cancer *** displays a desmoplastic reaction(DR)that has been inversely associated with poor prognosis;less DR is associated with a better *** reaction generates excessive connective tissue,in which cancer-associated fibroblasts(CAFs)are critical cells that form a part of the tumor *** are directly involved in tumorigenesis through different ***,their role in immunosuppression in CRC is not well understood,and the precise role of signal transducers and activators of transcription(STATs)in mediating CAF activity in CRC remains *** the myriad chemical and biological factors that affect CAFs,different cytokines mediate their function by activating STAT signaling ***,the harmful effects of CAFs in favoring tumor growth and invasion may be modulated using STAT ***,we analyze the impact of different STATs on CAF activity and their immunoregulatory role.

关键词： Cancer-associated fibroblasts Signal transducer and activator of transcription signaling Colorectal cancer Immunity Immunosuppression

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：