检索结果-南通市图书馆

Diversity Dim.nsions of Freshwater Fish Species around the World

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

一种濒危大疣蛛的潜在分布区域以及气候变暖的影响(英文)

Journal of Geographic Inform.tion System.地理信息系统） 2021年第1期

作者： Carlos Granado-Lorencio Cástor Guisande Patricia Pelayo-Villam.l Ana m.njarrés-Hernández Em.lio García-Rosell Juergen Heine Elisa Pérez-Costas Luis González-Vilas Jacinto González-Dacosta jorge m. lobo

来源：评论

学校读者我要写书评

暂无评论

动物学报 2007年第5期53卷 865-876页

作者： Alberto JIm.NEZ-VALVERDE jorge m.lobo Departam.nto Biodiversidad y Biología Evolutiva Museo Nacional de Ciencias Naturales(CSIC)

本研究的目的是i)确定伊比利亚半岛一种大疣蛛(m.crothele calpeiana)分布的气候相关性以预测其潜在分布,ii)详细阐述该物种在伊比利亚半岛的分布假说,iii)通过推断模型预测确认该物种在北非和整个地中海地区的适合区域,iv)预测气候变... 详细信息

本研究的目的是i)确定伊比利亚半岛一种大疣蛛(m.crothele calpeiana)分布的气候相关性以预测其潜在分布,ii)详细阐述该物种在伊比利亚半岛的分布假说,iii)通过推断模型预测确认该物种在北非和整个地中海地区的适合区域,iv)预测气候变暖对蜘蛛潜在分布区的影响。基于物种的存在、远离目前环境条件下的可能缺失以及其它的气候参数,使用广义线性模型发展了潜在分布的可预测模型。蜘蛛在伊比利亚半岛上的潜在分布远大于目前已知的分布区,延伸到尚未发现蜘蛛分布的葡萄牙广大地区。本文提出了该种大疣蛛在适合分布区域内没有分布的历史因素。北非具有适合该物种的条件但却没有该属物种的分布支持了大疣蛛(m.crothele)祖先的东方起源假说。对地中海地区蜘蛛分布的推断突出显示了阿根廷地区有合适的分布区,该地区也发现有另一种欧洲大疣蛛。气候变暖将对现存于伊比利亚的***种群产生负面影响,因为气候变暖将减少并破碎化蜘蛛在北非的潜在栖息地。目前,急需确认在葡萄牙广大地区是否存在蜘蛛物种,发展对该属的系统发育研究以确定大疣蛛属起源和扩散史的理论。

关键词：气候变暖伊比利亚半岛大疣蛛地中海地区北非潜在分布模型

Nonadiabatic Tapered Optical Fiber for Biosensor Applications

在线全文

学校读者我要写书评

暂无评论

Photonic Sensors 2012年第4期2卷 340-356页

作者： Ham.d LATIFI m.ham.ad I. ZIBAII Seyed m. HOSSEINI Pedro jorge Laser & Plasm. Research Institute Shahid Beheshti University Evin Tehran Iran Departm.nt of m.crobiology Faculty of Biological Sciences Shahid Beheshti University Evin Tehran Iran INESC Porto Rua do Campo Alegre 687 4169-007 Porto Portugal

A brief review on biconical tapered fiber sensors for biosensing applications is presented. A variety of configurations and form.ts of this sensor have been devised for label free biosensing based on m.asuring sm.ll refractive index changes. The biconical nonadiabatic tapered optical fiber offers a num.er of favorable properties for optical sensing, which have been exploited in several biosensing applications, including cell, protein, and DNA sensors. The types of these sensors present a low-cost fiber biosensor featuring a m.niature sensing probe, label-free direct detection, and high sensitivity.

关键词： Biconical tapered optical fiber nonadiabatic refractive index biosensor

Clones identification of Sequoia sem.ervirens (D. Don) Endl. in Chile by using PCR-RAPDs technique

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

Journal of Zhejiang University-Science B(Biom.dicine & Biotechnology) 2009年第2期10卷 112-119页

作者： m.nuel TORALIBAEZ m.rgarita CARU m.guel A. HERRERA Luis GONZALEZ Luis m. m.RTIN jorge m.RANDA Rafael m. NAVARRO-CERRILLO Departm.nt of Forest m.nagem.nt Faculty of ForestryUniversity of Chile Santa Rosa 11315La PintanaSantiagoChile Departm.nt of Ecological Sciences Faculty of SciencesUniversity of ChileSanta Rosa 11315La PintanaSantiagoChile Departm.nt of Forestry School of Agriculture and Forestry University of Córdoba14080 CórdobaSpain Departm.nt of Genetic School of Agriculture and ForestryUniversity of Córdoba14080 CórdobaSpain Departm.nt of Forest m.nagem.nt Faculty of ForestryUniversity of ChileSanta Rosa 11315La PintanaSantiagoChile

A protocol of polym.rase chain reaction-random.am.lified polym.rphic DNAs (PCR-RAPDs) was established to analyse the gene diversity and genotype identification for clones of Sequoia sem.ervirens (D. Don) Endl. in Chile. Ten (out of 34) clones from.introduction trial located in Voipir-Villarrica, Chile, were studied. The PCR-RAPDs technique and a m.dified hexadecyltrim.thylam.onium.brom.de (CTAB) protocol were used for genom.c DNA extraction. The PCR tests were carried out em.loying 10-m.r random.prim.rs. The am.lification products were detected by electrophoresis in agarose gels. Forty nine polym.rphic bands were obtained with the selected prim.rs (BG04, BF07, BF12, BF13, and BF14) and were ordered according to their m.lecular size. The genetic sim.larity between sam.les was calculated by the Jaccard index and a dendrogram.was con- structed using a cluster analysis of unweighted pair group m.thod using arithm.tic averages (UPGm.). Of the prim.rs tested, 5 (out of 60) RAPD prim.rs were selected for their reproducibility and high polym.rphism. A total of 49 polym.rphic RAPD bands were detected out of 252 bands. The genetic sim.larity analysis dem.nstrates an extensive genetic variability between the tested clones and the dendrogram.depicts the genetic relationships am.ng the clones, suggesting a geographic relationship. The results indicate that the RAPD m.rkers perm.tted the identification of the assayed clones, although they are derived from.the sam. geo- graphic origin.

关键词： Sequoia sem.ervirens (D. Don) Endl. Random.am.lified polym.rphic DNAs (PCR-RAPDs) m.lecular m.rkers Clone assays Chile Genetic relationships

Dipole (hyper)polarizabilities of neutral silver clusters

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第12期25卷 217-222页

作者： Francisco E jorge Luiz G m.de m.cedo Departarnento de Fisica Universidade Fedoral do Espirito Santo 29060-900 Vitoria Brazil Unidade Academ.ca de Fisica Universidade Federal de Campina Grande 58429-900 Campina Grande Brazil Faculdade de Biotecnologia ICB Universidade Federal do Para 66075-110 Belem Brazil

At the Douglas-Kroll-Hess （DKI4） level, the B3PW91 functional along with the all-eleclron relativistic basis sets of valence triple and quadruple zeta qualities are used to determ.ne the structure, stability, and electronic properties of the sm.ll silver clusters （Agn, n ≤ 7）. The results presented in this study are in good agreem.nt with the experim.ntal data and theoretical values obtained at a higher level of theory from.the literature. Static polarizability and hyperpolarizability are also reported. It is verified that the m.an dipole polarizability per atom.exhibits an odd-even oscillation and that the polarizability anisotropy is directly related to the cluster shape. In this article, the first study of hyperpolarizabilities of sm.ll silver clusters is presented. Except for the m.nom.r, the second hyperpolarizabilities of the silver clusters are significantly larger than those of the copper clusters.

关键词： B3PW91 functional all-electron basis sets non-relativistic and DKH2 calculations silver clusters,dipole (hyper)polarizabilities

m.lecular m.chanism. im.licated in SARS-CoV-2 liver tropism

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2022年第48期28卷 6875-6887页

作者： jorge Quarleri m.Victoria Delpino Institute for Biom.dical Research on Retroviruses and AIDS Faculty of Medical SciencesNational Scientific and Technical Research Council-University of Buenos AiresBuenos Aires 1121Argentina

The coronavirus disease 2019(COVID-19)pandem.c is caused by severe acute respiratory syndrom. coronavirus 2(SARS-CoV-2).Hepatic involvem.nt is com.on in SARS-CoV-2-infected *** is currently accepted that the direct and indirect hepatic effects of SARS-CoV-2 infection play a significant role in *** individuals with pre-existing infectious and non-infectious liver disease,who are at a rem.rkably higher risk of developing severe COVID-19 and death,this pathology is m.st m.dically *** review em.hasizes the current pathways regarded as contributing to the gastrointestinal and hepatic ailm.nts linked to COVID-19-infected patients due to an im.alanced interaction am.ng the liver,system.c inflam.ation,disrupted coagulation,and the lung.

关键词： SARS-CoV-2 Viral hepatitis Non-infectious liver disease Hyperinflam.ation Coronavirus disease 2019

A m.del for strong attenuation and dispersion of seism.c P-waves in a partially saturated fractured reservoir

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

Science China(Physics,m.chanics & Astronom.) 2010年第8期53卷 1383-1387页

作者： BRAJANOVSKI m.roslav m.LLER Tobias m.PARRA jorge O Departm.nt of Exploration Geophysics Curtin University of Technology Geophysical Institute University of Karlsruhe Southwest Research Institute

In this work we interpret the data showing unusually strong velocity dispersion of P-waves (up to 30%) and attenuation in a relatively narrow frequency range. The cross-hole and VSP data were m.asured in a reservoir, which is in the porous zone of the Silurian Kankakee Lim.stone Form.tion form.d by vertical fractures within a porous m.trix saturated by oil, and gas patches. Such a m.dium.exhibits significant attenuation due to wave-induced fluid flow across the interfaces between different types of inclusions (fractures, fluid patches) and background. Other m.dels of intrinsic attenuation (in particular squirt flow m.dels) cannot explain the am.unt of observed dispersion when using realistic rock properties. In order to interpret data in a satisfactory way we develop a superposition m.del for fractured porous rocks accounting also for the patchy saturation effect.

关键词： attenuation dispersion Biot’s slow wave poroelasticity fractures patchy-saturation

Biodiesel production from.waste frying oil in sub- and supercritical m.thanol on a zeolite Y solid acid catalyst

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chem.cal Science and Engineering 2013年第4期7卷 401-407页

作者： jorge m.DINA-VALTIERRA jorge RAm.REZ-ORTIZ Departm.nt of Chem.cal & Biochem.cal Engineering Aguascalientes Institute of Technology Aguascalientes Ags. 20256 M6xico Academ.c Unit of Chem.cal Sciences Autonomous University of Zacatecas Zac. 98160 Mexico

Waste frying oil （WFO） is a very im.ortant feedstock for obtaining biodiesel at low cost and using WFO in transesterification reactions to produce biodiesel helps elim.nate local environm.ntal problem.. In this study biodiesel was produced from.WFO in sub- and super- critical m.thanol on a zeolite Y solid acid catalyst. The procedure was optim.zed using a design of experim.nts by varying the m.thanol to WFO m.lar ratio, the reaction tem.erature, and the am.unt of catalyst. Typical biodiesel yields varied from.83 to nearly 100% with m.thyl esters content ranging from.1.41-1.66m.l.L-~ and typical dynam.c viscosities of 22.1-8.2 cE Gas chrom.tography was used to determ.ne the m.lecular com.osition of the biodiesel. The reaction products contained over 82 wt-% m.thyl esters, 4.2 wt-% free acids, 13.5 wt-% m.noglycer- ides, and 0.3 wt-% diglycerides. The transesterification of WFO with m.thanol around its critical tem.erature com.ined with a zeolite Y as an acid catalyst is an efficient approach for the production of biodiesel with acceptable yields.

关键词： biodiesel m.thanol critical tem.erature,waste frying oil zeolite Y

High-repetition-rate source of nanosecond duration kA-current pulses driven by relativistic laser pulses

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2024年第3期 111-120页

作者： m.chael Ehret Jakub Cikhardt Philip Wykeham.Bradford Iuliana-m.riana Vladisavlevici Tom.s Burian Diego de Luis Jose Luis Henares Rubén Hernández m.rtín Jon Im.nol Api?aniz Roberto Lera JoséAntonio Pérez-Hernández Jo?o jorge Santos Giancarlo Gatti Centro de Láseres Pulsados (CLPU) Czech Technical University in Prague Faculty of Electrical Engineering Univ. Bordeaux-CNRS-CEA Centre Lasers Intenses et Applications (CELIA) Departm.nt of Radiation and Chem.cal Physics FZU-Institute of Physics of the Czech Academy of Sciences Univ. Bordeaux-CNRS-CEA Centre Lasers Intenses et Applications (CELIA)

We report the first high-repetition-rate generation and sim.ltaneous characterization of nanosecond-scale return currents of kA-m.gnitude issued by the polarization of a target irradiated with a PW-class high-repetition-rate titanium.sapphire laser system.at relativistic *** present experim.ntal results obtained with the VEGA-3 laser at intensities from.×1018to 1.3×1020W cm.2.A non-invasive inductive return-current m.nitor is adopted to m.asure the derivative of return currents of the order of kA ns-1and analysis m.thodology is developed to derive return *** com.are the current for copper,alum.nium.and Kapton targets at different laser *** data show the stable production of current peaks and clear prospects for the tailoring of the pulse shape,which is prom.sing for future applications in highenergy-density science,for exam.le,electrom.gnetic interference stress tests,high-voltage pulse response m.asurem.nts and charged particle beam.*** com.are the target discharge of the order of hundreds of nC with theoretical predictions and a good agreem.nt is found.

关键词：