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Integrative Zoology 2010年第1期5卷 63-69页

作者： Ila GEIGENFEIND Daniel HA AG-WACK ERNAGEL Department of Biomedicine Institute of AnatomyUniversity of BaselBaselSw itzerland

Chlamydophila psittaci(Lillie,1930)Everett et al.,1999,the pathogenic agent of human ornithosis,is widespreadin feral pigeon populations and many cases of transmission from feral pigeons to humans have been *** of the present study was to detect *** in environmental samples to find out more about possibletransmission routes and,therefore,to assess the zoonotic risk for *** samples were collected from nestboxes in a feral pigeon ***,samples were taken from the feather dust film covering the water surface ofpublic fountains where pigeons regularly *** samples were tested for the presence of chlamydial antigenusing an antigen enzyme-linked immunosorbent assay to prove shedding of *** by feral *** testdetects a genus specific lipopolysaccharide in the outer membrane of the chlamydial *** were testedusing the IDEIA PCE Chlamydia Test kit(DakoCytomation)and positive results were verified with IDEIA ChlamydiaBlocking Reagents(DakoCytomation).The IDEIA PCE Chlamydia Test yields a high proportion of positive ***,when IDEIA Chlamydia Blocking was performed,most of the positive results turned out to be negative orcould not be *** conclude that antigen-enzyme-linked immunosorbent assay tests are not suitable fordetecting *** in environmental *** publications where no blocking test was used should bereconsidered critically.

关键词： antigen-enzyme-linked immunosorbent assay Chlamydophila psittaci Columba livia environmen-tal samples zoonosis

Production and Characterization of Spherical Porous Lignin Pellets

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稀有金属材料与工程 2011年第S3期40卷 188-192页

作者： Li Xianfa, Luo Xuegang Southwest University of Science and Technology, Mianyang 621010, China sw Univ Sci & Technol Mianyang 621010 Peoples R China

With industrial kraft lignin as precursors, the transformer oil as dispersive phase, addin sodium dodecyl sulfate as dispersant and epichlorohydrin as crosslinking agent, the spheric porous lignin pellets were produced by two-phase solvent system. The suitable process conditions of producing the lignin pellets were determined by signal-factor and orthogonal experiments. The lignin pellets were characterized by scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FT-IR), thermogravimetry and X-ray diffraction analysis. The results show that the ideal spherical lignin pellets with 87.75% of the yield could be obtained under the such conditions as 5 g lignin dissolved in 50 ml water by adjusting the solution pH value to 13, 0.6 g sodium dodecyl sulfate, 3 g epichlorohydrin and 150 ml transformer oil. Morphology studies show that lignin pellets have the full spheric shape and inner porous microstructure. Evidence for the reaction between lignin and epichlorohydrin has been observed using FT-IR and thermogravimetric analysis. The results of X-ray diffraction analysis demonstrate that crosslinked lignin pellets mainly are an amorphous polymer.

关键词： Kraft lignin two-phase solvent system spherical porous lignin pellets

Miniaturisation of high-throughput plasmid DNA library preparation for next-generation sequencing using multifactorial optimisation

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Synthetic and Systems Biotechnology 2019年第1期4卷 57-66页

作者： Lorna Suckling Ciaran McFarlane Chelsea Sawyer Stephen P.Chambers Richard I.Kitney David W.McClymont Paul S.Freemont The London DNA Foundry SynbiCITEImperial College LondonLondonSW72AZUK Department of Life Sciences Imperial College LondonLondonSW72AZUK Department of Bioengineering Imperial College LondonLondonSW72AZUK Department of Medicine Imperial College LondonLondonSW72AZUK

High-throughput preparation of plasmid DNA libraries for next-generation sequencing(NGS)is an important capability for molecular biology *** particular,it is an essential quality control(QC)check when large numbers of plasmid variants are being ***,we describe the use of the Design of Experiments(DOE)methodology to optimise the miniaturised preparation of plasmid DNA libraries for NGS,using the Illumina®Nextera XT technology and the Labcyte Echo®acoustic liquid dispensing ***,we describe methods which can be implemented as a QC check for identifying the presence of genomic DNA(gDNA)in plasmid DNA samples and the subsequent shearing of the gDNA,which otherwise prevents the acoustic transfer of plasmid *** workflow enables the preparation of plasmid DNA libraries which yield high-quality sequencing data.

关键词： preparation otherwise shearing

绿色信贷对商业银行风险的影响——基于中国银行业的多期双重差分验证

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金融发展研究 2024年第2期 55-63页

作者：曹高航高惺惟王天琪田容至北京大学政府管理学院北京100871 中共中央党校经济学部北京100091 伦敦大学国王学院人文艺术学院伦敦SW81RT

商业银行支持绿色发展和防范风险是一对不可调和的矛盾吗?本文基于2008—2019年中国64家商业银行数据构建了绿色信贷政策的准自然实验,利用双重差分模型研究了绿色信贷对商业银行风险的影响。研究发现:商业银行开展绿色信贷可以有效降... 详细信息

商业银行支持绿色发展和防范风险是一对不可调和的矛盾吗?本文基于2008—2019年中国64家商业银行数据构建了绿色信贷政策的准自然实验,利用双重差分模型研究了绿色信贷对商业银行风险的影响。研究发现:商业银行开展绿色信贷可以有效降低商业银行风险,政策效应存在3年的滞后性;绿色信贷政策可以削弱大型国有商业银行和城市商业银行风险,但对非大型国有商业银行和农村商业银行的影响并不明显;增加绿色信贷份额可以增强商业银行流动性及创新性,进而降低商业银行风险。

关键词：绿色信贷商业银行风险流动性多期双重差分检验

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ON HOMOCLINIC BIFURCATION SYSTEM IN THE PRESENCE OF STOCHASTIC PERTURBATION

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Acta Mechanica Solida Sinica 1998年第1期11卷 37-45页

作者： Liu Xianbin Chen Qiu sw Jiaotong Univ Dept Appl Mech & Engn Chengdu Peoples R China sw Jiaotong Univ Inst Engn Sci Chengdu Peoples R China

By virtue of the singular point theory for one-dimension diffusionprocess and the stochastic averaging approach of energy envelop, thebifurcation behavior of a homoclinic bifurcation system, which is inthe presence of... 详细信息

关键词： codimension 2 bifurcation parametric white noise excitation diffusionprocess

Computational design of bimetallic core-shell nanoparticles for hot-carrier photocatalysis

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npj Computational Materials 2018年第1期4卷 389-395页

作者： Luigi Ranno Stefano Dal Forno Johannes Lischner Department of Materials Imperial College LondonLondon SW72AZUK Department of Physics Imperial College LondonLondon SW72AZUK Department of Physics and Department of Materials and the Thomas Young Centre for Theory and Simulation of MaterialsImperial College LondonLondon SW72AZUK

Computational design can accelerate the discovery of new materials with tailored properties,but applying this approach to plasmonic nanoparticles with diameters larger than a few nanometers is challenging as atomistic first-principles calculations are not feasible for such *** this paper,we employ a recently developed material-specific approach that combines effective mass theory for electrons with a quasistatic description of the localized surface plasmon to identify promising bimetallic core-shell nanoparticles for hot-electron ***,we calculate hot-carrier generation rates of 100 different core-shell nanoparticles and find that systems with an alkali-metal core and a transition-metal shell exhibit high figures of merit for water splitting and are stable in aqueous *** analysis reveals that the high efficiency of these systems is related to their electronic structure,which features a two-dimensional electron gas in the *** calculations further demonstrate that hotcarrier properties are highly tunable and depend sensitively on core and shell *** design rules resulting from our work can guide experimental progress towards improved solar energy conversion devices.

关键词： applying alkali diameters

Numerical analysis of three-dimensional thermo-elastic rolling contact under steady-state conditions

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Friction 2022年第4期10卷 630-644页

作者： Yonghun YU Junho SUH Department of Mechanical Engineering Pusan National UniversityBusan SW72AZRepublic of Korea

In this study,a three-dimensional thermo-elastic model that considers the interaction of mechanical and thermal deformation is developed using a semi-analytic method for steady-state rolling *** types in all directions are considered in this *** verification,the numerical analysis results of shear traction and temperature increase are compared separately with existing numerical results,and the consistency is *** analysis results include heat flux,temperature increase,contact pressure,and shear *** severe rolling conditions,the thermal effect changes the behavior of the contact interface ***,the effects of creepage,rolling speed,and conformity under different rolling and creep conditions are investigated.

关键词： creep frictional heat rolling contact spin thermal deformation

Stability of Nonlinear Differential-Algebraic Systems Via Additive Identity

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IEEE/CAA Journal of Automatica Sinica 2020年第4期7卷 929-941页

作者： Pierluigi Di Franco Giordano Scarciotti Alessandro Astolfi the Electrical and Electronic Engineering Department Imperial College LondonLondon SW72AZUK

The stability analysis for nonlinear differentialalgebraic systems is addressed using tools from classical control theory. Sufficient stability conditions relying on matrix inequalities are established via Lyapunov Direct Method. In addition, a novel interpretation of differential-algebraic systems as feedback interconnection of a purely differential system and an algebraic system allows reducing the stability analysis to a smallgain-like condition. The study of stability properties for constrained mechanical systems, for a class of Lipschitz differential-algebraic systems and for an academic example is used to illustrate the theory.

关键词： Differential-algebraic systems Lyapunov method small-gain theorem stability analysis

Relationship between FAC at plasma sheet boundary layers and AE index during storms from August to October,2001

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Science China(Technological Sciences) 2008年第7期51卷 842-848页

作者： DUNLOP M Imperial College London London SW7 2AZ UK

Unlike the previous single (dual) satellite observation, the four Clusterll satellites make it possible to directly compute the continuous field-aligned current (FAC) density according to the magnetic data from them and to enable the investigation of the relationship between the FAC and geomagnetic activity. This paper analyzes the observation data when the Cluster satellites crossed the plasma sheet boundary layer (PSBL) in the magnetotail during the two magnetic storms in August to October 2001. According to the data, during the magnetic storms the relationship between the variations of FAC and AE index turned out to be: 1) FAC was obviously increasing during the storms; 2) FAC density was approximately negatively correlated with AE index from the sudden commencement to the early main phase of the storm; 3) they were approximately positively correlated during the late main phase and early recovery phase; 4) they were no apparent correlation during the late recovery phase.

关键词： ionosphere-magnetosphere storm cases FAC AE index

Self-organized criticality and its application in the slope disasters under gravity

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Science China(Technological Sciences) 2003年第Z1期46卷 20-30页

作者： YAO Lingkan, HUANG Yuan & LU Yang School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China Southwestern Institute of Physics, Chengdu 610031, China sw Jiaotong Univ Sch Civil Engn Chengdu 610031 Peoples R China sw Inst Phys Chengdu 610031 Peoples R China

Firstly, three kinds of sand pile experiments which reflect the universal process of energy dissipation within the slope accumulation under the self-organized action are reviewed. They all show that self-organized criticality (SOC) is related to granular non-uniform. The experiment of Tokamak plasma system is introduced, which shows some of SOC properties of Tokamak plasmas in Ohmic region or L-mode. Secondly, material tests in geotechnical engineering and numerical simulations of micro-structure of sand piles indicate that SOC is determined by the structural characteristics. Finally, according to the principle of SOC, the behavior of slope disasters under gravity and its forecast as well as the design of protection engineering are discussed.

关键词： SOC, sand pile experiment, experiment of Tokamak plasma system, slope disasters under gravitation force.