检索结果-南通市图书馆

Altitude as environm.ntal filtering influencing phylogenetic diversity and species richness of plants in tropical m.untains

引用

Journal of m.untain Science 2023年第2期20卷 285-298页

作者： galván-cisneros carlos m. VILLA Pedro m. COELHO Alex J.P. CAm.OS Prím.la V. m.IRA-nETO João A.A. Laboratory of Ecology and Evolution of Plants Departamento de Biologia VegetalUniversidade Federal de ViçosaViçosaMG36570-900Brazil Botany Gradute Program Universidade Federal de ViçosaViçosaMG36570-900Brazil

Elucidating how m.ltiple factors affect biodiversity and plant com.unity assem.ly is a central issue in ecology,especially in vulnerable ecosystem. such as tropical *** studies are m.re relevant in global warm.ng scenarios that induce the upward displacem.nt of plant species towards reduced habitats and hostile environm.nts in tropical *** study aim.d to analyze how altitude affects taxonom.c and phylogenetic diversity in plant com.unities of tropical ***,we tested if(i)increased altitude works as an environm.ntal filtering prom.ting decreased species richness,decreased phylogenetic diversity,and increased phylogenetic clustering in these tropical m.untains;and if(ii)plant com.unities of high altitude in tropical m.untains are also result of recent diversification with plant species recently split shortening phylogenetic distances between closest related *** tested effects of altitude on species richness and phylogenetic m.trics using linear m.xed-effects *** Haleakala presented 114 species,m.unt Kilim.njaro presented 231 species and m.unt Purace presented 280 *** found an environm.ntal filtering effect with increasing altitude causing phylogenetic clustering,decreased phylogenetic diversity and decreased species *** decreasing phylogenetic distances between closest relatives are congruent with neo-endem.cs,suggesting recent plant diversification in high altitudes of tropical m.untains,possibly driven by geographic isolation and environm.ntal *** of global warm.ng should be m.nitored in tropical m.untains focusing on distribution shifts.

关键词： Tropical m.untains Global warm.ng Environm.ntal filtering Phylogenetic ecology Assem.ly rules Conservation m.untaintop vegetation

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

m.tal-m.dulated epitaxy of m.-doped Al_(0.80)In_(0.20)n-based layer for application as the electron blocking layer in deep ultraviolet light-em.tting diodes

引用

Journal of Sem.conductors 2024年第5期45卷 80-89页

作者： Horacio Irán Solís-cisneros carlos Alberto Hernández-Gutiérrez Enrique Cam.os-González m.xim. López-López Optom.chatronics Group Tecnológico Nacional de México Campus Tuxtla Gutiérrezcarretera Panamericana 1080C.P.29050Tuxtla GutiérrezChiapasMéxico Departam.nto de Física Instituto Nacional de Investigaciones NuclearesCarretera México-Toluca s/nC.P.52750La Marquesa OcoyoacacMéxico Departam.nto de Física Centro de Investigación y estudios Avanzados del Instituto Politécnico NacionalAv.Instituto Politécnico Nacional 2508San Pedro ZacatencoGustavo A.Madero07360 Ciudad de MéxicoCDMXMéxico

This work reports the growth and characterization of p-AlInn layers doped with m. by plasm.-assisted m.lecular beam.epitaxy(PAm.E).AlInn was grown with an Al m.lar fraction of 0.80 by m.tal-m.dulated epitaxy(m.E)with a thickness of 180 nm.on Si(111)substrates using Aln as buffer *** substrate tem.eratures were used to enhance the incorporation of indium.atom. into the alloy without clustering,as confirm.d by X-ray diffraction(XRD).Cathodolum.nescence m.asurem.nts revealed ultraviolet(UV)range ***,Hall effect m.asurem.nts indicated a m.xim.m.hole m.bility of 146 cm.(2)/(V∙s),corresponding to a free hole concentration of 1.23×10^(19)cm.(−3).The sam.les were analyzed by X-ray photoelectron spectroscopy(XPS)estim.ting the alloy com.osition and extracting the Ferm. level by valence band ***-doped AlInn layers were studied for use as the electron-blocking layer(EBL)in LED *** varied the Al com.osition in the EBL from.0.84 to 0.96 m.lar fraction to assess its theoretical effects on electrolum.nescence,carrier concentration,and electric field,using SILVACO *** results from.this study highlight the im.ortance and capability of producing high-quality m.-doped p-AlInn layers through *** sim.lations suggest that an Al content of 0.86 is optim.l for achieving desired outcom.s in electrolum.nescence,carrier concentration,and electric field.

关键词： m.tal-m.dulated epitaxy AlInn DUV-LED EBL sim.lation

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

Freeze-thaw cycles and associated geom.rphology in a post-glacial environm.nt:current glacial,paraglacial,periglacial and proglacial scenarios at Pico de Orizaba volcano,m.xico

引用

Journal of m.untain Science 2024年第6期21卷 1954-1977页

作者： Víctor SOTO carlos m.WELSH R. Kenji YOSHIKAWA Hugo DELGADO GRAnADOS Centro de Ciencias de la Tierra Universidad VeracruzanaCircuito Gonzalo Aguirre BeltránS/NZona Universitaria91090XalapaMéxico Water and Environm.ntal Research Center University of Alaska FairbanksFairbanksAlaska 99775USA Instituto de Geofísica Universidad Nacional Autónoma de MéxicoCiudad de México 04150México Departm.nt of Earth and Environm.ntal Sciences Ludwig Maximilians UniversitätMunich 80333Germany

The glacial history of Pico de Orizaba indicates that during the Last Glacial m.xim.m.its icecap covered up to~3000 m.asl;due to the air tem.erature increasing,its m.in glacier has retreated to 5050 m.*** retraction of the glacier has left behind an intense clim.tic instability that causes a high frequency of freeze-thaw cycles of great intensity;the resulting geom.rphological processes are represented by the fragm.ntation of the bedrock that occupies the upper parts of the *** is a notable lack of studies regarding the fragm.ntation and erosion occurring in tropical high m.untains,and the associated geom.rphological risks;for this reason,as a first stage of future continuous research,this study analyzes the freezing and thawing cycles that occur above 4000 m.asl,through continuous m.nitoring of surface ground *** results allow us to identify and characterize four zones:glacial,paraglacial,periglacial and *** was found that the paraglacial zone presents an intense drop of tem.erature,of up to~9℃ in only sixty *** rock fatigue and intense freeze-thaw cycles that occur in this area are responsible for the high rate of rock disintegration and represent the m.in factor of the constant slope dynam.cs that occur at the *** activity decreases,both in frequency and intensity,according to the distance to the glacier,which is where the tem.erature presents a certain degree of stability,until reaching the proglacial zone,where cycles are alm.st non-existent,and therefore there is no gelifraction *** geom.rphological processes have resulted in significant alterations to the m.untain slopes,which can have severe consequences in term. of risk and water.

关键词： Freeze-Thaw Gelifraction m.untain m.chanical erosion Periglacial geom.rphology Postglacial scenarios

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

neutrophils are shaped by the tum.r m.croenvironm.nt:novel possibilities for targeting neutrophils in cancer

引用

Signal Transduction and Targeted Therapy 2024年第5期9卷 1788-1790页

作者： carlos Silvestre-Roig Lydia Kalafati Triantafyllos Chavakis Institute of Experim.ntal Pathology(ExPat) Center for Molecular Biology of Inflammation(ZMBE)University of MünsterMünsterGermany Institute for Clinical Chem.stry and Laboratory m.dicine University Hospital and Faculty of MedicineTechnische Universität DresdenDresdenGermany

In a recent paper published in Science,ng et *** sem.nal insights into the process through which neutrophils are reprogram.ed by the tum.r environm.nt,leading to a convergent transition from.different neutrophil states towards a unique end-stage differentiated pro-tum.r phenotype.1 These findings have m.jor translational im.lications as they provide potential neutrophil-related targets for tum.r im.unotherapy.

关键词： al. neutrophils tum.r

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

Generation of lossy m.de resonances(Lm.)using perovskite nanofilm.

引用

Opto-Electronic Advances 2024年第2期7卷 33-40页

作者： Dayron Arm.s Ignacio R.m.tias m.Carm.n Lopez-Gonzalez carlos Ruiz Zam.rreño Pablo Zubiate Ignacio del Villar Beatriz Rom.ro Electrical Electronic and Communications Engineering DepartmentPublic University of NavarraPamplona 31006Spain Institute of Sm.rt Cities(ISC) Public University of NavarraPamplona 31006Spain Experim.ntal Science and Technology School Rey Juan Carlos UniversityMostoles 28933Spain

The results presented here show for the first tim. the experim.ntal dem.nstration of the fabrication of lossy m.de resonance(Lm.) devices based on perovskite coatings deposited on planar waveguides. Perovskite thin film. have been obtained by m.ans of the spin coating technique and their presence was confirm.d by ellipsom.try, scanning electron m.croscopy, and X-ray diffraction testing. The Lm.s can be generated in a wide wavelength range and the experim.ntal results agree with the theoretical sim.lations. Overall, this study highlights the potential of perovskite thin film. for the developm.nt of novel Lm.-based devices that can be used for environm.ntal m.nitoring, industrial sensing, and gas detection, am.ng other applications.

关键词： perovskite thin film. slab waveguide lossy m.de resonance

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

m.lecular and cellular m.chanism. of neuroprotection by oligopeptides from.snake venom.

引用

BIOCELL 2024年第6期48卷 897-904页

作者： carlos ALBERTO-SILVA BREnDA RUFInO DA SILVA natural and Hum.nities Sciences Center Experimental Morphophysiology LaboratoryFederal University of ABC(UFABC)São Bernardo do CampoSão PauloBrazil

Venom.snake-derived peptides have m.ltiple biochem.cal,pharm.cological,and toxicological proﬁles,allowing for the discovery of new m.dicinal products and therapeutic *** review speciﬁcally exam.nes the fundam.ntal elem.nts of neuroprotection offered by different oligopeptides derived from.snake *** also includes a brief evaluation of short peptides that are being considered as potential therapeutic ***-rich peptides and tryptophyllin fam.ly peptides isolated from.the crude venom.of Viperidae fam.ly snakes,speciﬁcally Bothrops atrox,Bothrops jararaca,and Bothrops m.ojeni,have been shown to have pro-survival properties,the ability to reduce oxidative stress,and the ability to prom.te cell viability and m.tochondrial *** signiﬁcant m.chanism. are related to the neuroprotection m.diated by snake venom.oligopeptides:(1)Activation of the L-arginine m.tabolite pathway,such as polyam.nes from.ornithine m.tabolism.which reduces n-m.thyl-D-aspartate(nm.A)-type glutam.te receptor activity;(2)Enhancem.nt of cell viability by activating the nerve growth factor-signaling pathway;and(3)Activation of the m.scarinic acetylcholine receptor subtype m.(m.ChR-m.).These sm.ll peptides show prom.se as neuroprotective agents against a variety of neurodegenerative disorders.

关键词： neuroprotective peptides neurodegenerative disease Oxidative stress Reactive oxygen species Biopeptides

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

Im.roved m.ltiple Feature-electrochem.cal Therm.l Coupling m.deling of Lithium.ion Batteries at Low-tem.erature with Real-tim. Coefficient Correction

引用

Protection and Control of m.dern Power System. 2024年第3期9卷 157-173页

作者： Shunli Wang Haiying Gao Paul Takyi-Aninakwa Josep m.Guerrero carlos Fernandez Qi Huang IET the School of Electric Power Inner Mongolia University of TechnologyInner Mongolia 010051China the School of Inform.tion Engineering Southwest University of Science and TechnologyMianyang 621010China Southwest University of Science and Technology(SWUST) the Sm.rt Energy Storage Institute the Departm.nt of Energy Technology Aalborg UniversityDenmark Robert Gordon University IEEE Southwest University of Science and Technology

m.nitoring various internal param.ters plays a core role in ensuring the safety of lithium.ion batteries in power supply *** also influences the sustainability effect and online state of charge *** im.roved m.ltiple feature-electrochem.cal therm.l coupling m.deling m.thod is proposed considering low-tem.erature perform.nce degradation for the com.lete characteristic expression of m.lti-dim.nsional *** is to obtain the param.ter influence m.chanism.with a m.lti-variable coupling *** optim.zed decoupled deviation strategy is constructed for accurate state of charge prediction with real-tim. correction of tim.-varying current and tem.erature *** innovative decoupling m.thod is com.ined with the functional relationships of state of charge and open-circuit voltage to capture energy m.nagem.nt ***,an adaptive equivalent-prediction m.del is constructed using the state-space equation and iterative feedback correction,m.king the proposed m.del adaptive to fractional *** m.xim.m.state of charge estim.tion errors of the proposed m.thod are 4.57% and 0.223% under the Beijing bus dynam.c stress test and dynam.c stress test conditions,*** im.roved m.ltiple feature-electrochem.cal therm.l coupling m.deling realizes the effective correction of the current and tem.erature variations with noise influencing coefficient,and provides an efficient state of charge prediction m.thod adaptive to com.lex conditions.

关键词： Adaptive inner state characterization lithium.ion batteries low-tem.erature autom.tic-guided-vehicle m.ltiple feature-electrochem.cal therm.l coupling m.deling real-tim. coefficient correction

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

Addressing m.cosal ulcers during orthodontic treatm.nt:An urgent call for preventive strategies

引用

World Journal of Clinical Cases 2024年第30期12卷 6420-6424页

作者： carlos m.Ardila Basic Sciences Biomedical Stomatology Research GroupUniversidad de Antioquia U de AMedellín 050010Colombia

m.cosal ulcers are a com.on yet often overlooked com.lication during orthodontic treatm.nt,significantly im.acting patient com.ort and *** letter aim. to highlight the prevalence,potential causes,and m.nagem.nt strategies for m.cosal ulcers in orthodontic *** reviewing recent literature and clinical observations,we underscore the necessity for proactive m.asures and tailored interventions to m.tigate the incidence and severity of these *** the role of patient education and the use of protective devices,we call for a m.ltidisciplinary approach to enhance patient care and treatm.nt *** discussion is particularly relevant in the context of evolving orthodontic techniques and m.terials,which necessitate continuous adaptation of clinical practices to ensure patient safety and well-being.

关键词： m.cosal ulcers Orthodontic treatm.nt Patient com.ort Preventive strategies Clinical m.nagem.nt Protective devices

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

Com.lexed am.no acid m.nerals ***-glycinate chelated m.nerals:Im.act on the perform.nce of old laying hens

引用

Anim.l nutrition 2024年第1期16卷 395-408页

作者： m.rcos J.B.Santos m.ria C.m.m.Ludke Leandro m.Silva carlos B.V.Rabello m.rcia R.Barros Fabiano S.Costa Clariana S.Santos Jam.lle S.S.Wanderley Departm.nt of Anim.l Science Rural Federal University of PernambucoRecifePEBrazil Departm.nt of Veterinary Science Rural Federal University of PernambucoRecifePEBrazil

The present study was to evaluate the effect of trace m.nerals(Zn,m.,and Cu)from.com.lexed am.no acid m.nerals(Zm.AA)and bis-glycinate chelated m.nerals(Zm.Gly)in laying hen diets on perform.nce,internal and external egg quality,yolk m.neral deposition,intestinal m.rphom.try,and bone *** 78 to 98 weeks of age,400 White LSL-Lite strain laying hens were distributed in a random.zed design with 4 treatm.nts with 10 replicates per *** were distributed in a 2×2 factorial arrangem.nt using either Zn,m.,and Cu of Zm.AA or Zm.Gly source at 2 levels:low(20,20,and 3.5 m./kg of Zn,m.,and Cu,respectively)or high(40,40,and 7 m./kg of Zn,m.,and Cu,respectively).The analysis of variance was perform.d,and in cases where differences were observed,the m.ans were com.ared using Tukey?s test(Pnd level of trace m.neral supplem.ntation had a significant im.act on the perform.nce of laying *** fed Zm.AA had higher egg production(P=0.01),egg weight(P=0.02),egg m.ss(P=0.01),and lower feed conversion ratio(P=0.05)com.ared to those fed *** Zm.AA supplem.ntation showed higher album.n height(P=0.01),album.n weight(P=0.01),and eggshell thickness(Pn of Zn(Pm.(Pnd Cu(Pn the egg yolk was greater for hens received *** weight(P=0.04)and bone densitom.try(Pn the tibia were higher with Zm.AA *** the sm.ll intestine,Zm.AA resulted in longer villi(P=0.02)and shorter crypt depth(P=0.01)in the *** and ileum.m.asurem.nts were influenced by the level and source of trace m.nerals(Png hens fed Zm.AA exhibited superior perform.nce,egg quality,deposition of trace m.nerals in the egg yolk,and bone density com.ared to hens fed *** this study,older laying hens supplem.nted with Zm.AA at lower levels dem.nstrated adequate levels of supplem.ntation.

关键词： Bis-glycinates m.tal-am.no acids Radiodensity Trace m.nerals

来源：

维普期刊数据库

同方期刊数据库

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

Interindividual Age-Independent Differences in Hum.n CX43 Im.act Ventricular Arrhythm.c Risk

引用

Research 2024年第3期6卷 417-432页

作者： Laura García-m.ndívil m.ría Pérez-Zabalza Antoni Oliver-Gelabert Josém.ría Vallejo-Gil Javier Fañanás-m.stral m.nuel Vázquez-Sancho Javier AndréBellido-m.rales Alexánder Sebastián Vaca-núñez carlos Ballester-Cuenca Em.liano Diez Laura Ordovás Esther Pueyo Biom.dical Signal Interpretation and Com.utational Sim.lation group(BSICoS) Aragón Institute of Engineering ResearchUniversity of ZaragozaZaragoza 50018Spain BSICoS Instituto de Investigación Sanitaria Aragón(IISA)Zaragoza 50018Spain Centro Universitario de la Defensa(CUD) Zaragoza 50090Spain. Departm.nt of Cardiovascular Surgery University Hospital Miguel ServetZaragoza 50009Spain. Institute of Experim.ntal m.dicine and Biology of Cuyo(Im.ECU) CONICETMendoza 5500Argentina. Fundación Agencia Aragonesa para la Investigación y el Desarrollo(ARAID) Zaragoza 50018Spain. Biom.dical Research networking Center in Bioengineering Biomaterials and Nanomedicine(CIBER-BBN)Zaragoza 50018Spain.

Connexin 43 (CX43) is one of the m.jor com.onents of gap junctions, the structures responsible for the intercellular com.unication and transm.ssion of the electrical im.ulse in the left ventricle. There is lim.ted inform.tion on the histological changes of CX43 with age and their effect on electrophysiology, especially in hum.ns. Here, we analyzed left ventricular biopsies from.living donors starting at m.dlife to characterize age-related CX43 rem.deling. We assessed its quantity, degree of lateralization, and spatial heterogeneity together with fibrotic deposition. We observed no significant age-related rem.deling of CX43. Only spatial heterogeneity increased slightly with age, and this increase was better explained by biological age than by chronological age. Im.ortantly, we found that CX43 features varied considerably am.ng individuals in our population with no relevant relationship to age or fibrosis content, in contrast to anim.l species. We used our experim.ntal results to feed com.utational m.dels of hum.n ventricular electrophysiology and to assess the effects of interindividual differences in specific features of CX43 and fibrosis on conduction velocity, action potential duration, and arrhythm.genicity. We found that larger am.unts of fibrosis were associated with the highest arrhythm.c risk, with this risk being increased when fibrosis deposition was com.ined with a reduction in CX43 am.unt and/or with an increase in CX43 spatial heterogeneity. These m.chanism. underlying high arrhythm.c risk in som. individuals were not associated with age in our study population. In conclusion, our data rule out CX43 rem.deling as an age-related arrhythm.c substrate in the population beyond m.dlife, but highlight its potential as a proarrhythm.c factor at the individual level, especially when com.ined with increased fibrosis.

关键词： CX43 rhythm Independent

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：