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ESBL Production and Multidrug Resistance of Salmonella Serovars Isolates in Benue State

American Journal of Molecular Biology 2020年第3期10卷 200-223页

作者： B. o. okpa G. M. Gberikon C. U. Aguoru I. o. ogbonna Department of Microbiology Federal University of Agriculture Makurdi Nigeria

Studies on ESBL-producing and multi-drug resistance of Salmonella serovars distributed in Benue State were investigated. A total of four hundred and twenty (420) clinical stool samples, seventy (70) from each local government area were randomly collected from selected hospitals and analyzed for the presence of Salmonella spp. The isolates were characterized using Gram staining and biochemical tests. The result of AP120E biochemical test strip which contained dehydrated bacterial media and biochemical reagents in twenty (20) separate compartments. The result was obtained by evaluation of the compartments due to observed changes in after 24 hours where others were read by adding up reagents (Ferric chloride, Kovacs V.P reagents). The results were analyzed afterwards in accordance with the manufacturer’s software and positive results with ≥89% potential were confirmed as Salmonella spp. Amplified plasmids derived from 18 Salmonella strains recognized were made up of 23,130 base pairs. ESBL (Extended-spectrum beta-lactamases) genes were located on the plasmids. Two of the ESBL genes found were TEM genes and CTX-M (415 bp). Strains such as S. enterica Typhimurium-CP014981.1, S. enterica Enteritidis-CP007325.2, S. enterica Typhimurium-CP024619.1, S. enterica Typhimurium-CP023166.1, S. bongori-FR877557 and S. enterica Enteritidis-TY1 possessed TEM genes where as S. enterica Heidelberg-CP019176.1, S. enterica Typhi-AL513382.1 and S. enterica Typhimurium-MH196335.1 possessed CTX-M. Antibiotic resistance testing was performed using Kirby-Bauer disc diffusion method. The overall percentage susceptibility of the eight antibiotics tested on Salmonella serovars isolates shows that GEN had the highest % susceptibility of 100% followed by NIT (72.2%) and CoT (66.7%) before and after plasmid curing. % susceptibility was lower before curing than after curing i

关键词： ESBL Salmonella Serovars Susceptibility

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Predicting short-term adverse outcomes in the geriatric population presenting with syncope:a comparison of existing syncope rules and beyond

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Journal of Geriatric Cardiology 2023年第1期20卷 11-22页

作者： Suud A.Kiradoh Timothy E.Craven Maria o.Rangel Lillian M.Nosow Erfan Zarrinkhoo Suma Menon Parag A.Chevli Tareq M.Islam Luqman A.Thazhatuveetil-Kunhahamed Department of Internal Medicine Atrium Health Wake Forest Baptist Medical CenterWinston-SalemUSA Biostatistics EpidemiologyResearchand Design(BERD)Atrium Health Wake Forest Baptist Medical CenterWinston-SalemUSA Department of Cardiology Atrium Health Wake Forest Baptist Medical CenterUSA

oBJECTIVES Syncope at age 65+is associated with increased mortality,irrespective of *** rules were designed to aid in risk-stratification but were only validated in the general adult *** objective was to determine if they can be applied to a geriatric population in predicting short-term adverse *** In this single-center retrospective study,we evaluated 350 patients aged 65+presenting with *** criteria included confirmed non-syncope,active medical condition,drug or alcohol-related *** were stratified into high or low risk based on Canadian Syncope Risk Score(CSRS),Evaluation of Guidelines in Syncope Study(EGSYS),San Francisco Syncope Rule(SFSR),and Risk Stratification of Syncope in the Emergency Department(RoSE).Composite adverse outcomes at 48-hour and 30-day included all-cause mortality,major adverse cardiac and cerebrovascular events(MACCE),return emergency department visit,hospitalization,or medical *** assessed each score's ability to predict the outcomes using logistic-regression and compared performances using receiver-operator *** analyses were performed to study the associations between recorded parameters and *** CSRS outperformed with AUC of 0.732(95%CI:0.653-0.812)and 0.749(95%CI:0.688-0.809)for 48-h and 30-day outcomes,*** for CSRS,EGSYS,SFSR,and RoSE for 48-hour outcomes were 48%,65%,42% and 19%;and for 30-day outcomes were 72%,65%,30% and 55%,*** fibrillation/flutter on EKG,congestive heart failure,antiarrhythmics,systolic blood-pressureociated chest pain highly correlated with 48-h *** EKG abnormality,heart disease history,severe pulmonary hypertension,BNP>300,vasovagal predisposition,and antidepressants highly correlated with 30-day *** Performance and accuracy of four prominent syncope rules were suboptimal in identifying high-risk geriatric patients with short-term

关键词： syncope mortality return

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BEHAVIoR AS t→∞ oF THE SoLUTIoNS oF THE LINEAR SYSTEM oF ELASTIC THEoRY oN NoN－STAR－SHAPED EXTERIoR DoMAINS

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Acta Mathematica Scientia 1995年第1期15卷 103-112页

作者：刘德辅 Dept. of Appl. Math. Beijing Polytechnic Univ. Beijing 100022 China

The behavior as t→∞ of solutions of the linear system of elastic equations defined on anon-star-tshaped exterior domains in Rn (n≥3) is *** has showed that the local energydecays with arate of t-1+H (0≤H≤1),nonuniformly with respect to the geometrical propertiesof the *** when n is odd the local energy decays *** the classical elasticwave,when n=3,the behavior of the solution of the nonhomogeneous system with a right sideterm periodical with respect to time t is discussed.

关键词： Elastic Theory Asymptotic Behavior Local Energy Decay

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Ferromagnetic Resonance in Gd/Co Multilayer

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Chinese Physics Letters 2001年第7期18卷 973-975页

作者： A.V.Svalov J.M.Barandiarán V.o.Vas’kovskiy G.V.Kurlyandskaya L.Lezama N.G.Bebenin J.Gutiérrez D.Schmool Ural State University Lenin Ave.51620083 EkaterinburgRussia Universidad del PaIs Vasco UPV-EHU Facultad de Ciencias Apdo.64448080 BilbaoSpain Institute of Metal Physics Ural Division of RASKovalevskaya str.18GSP-170620219 EkaterinburgRussia Laboratory de Magnetisme et d’optique ptique CNRSUniversitéde Versailles-Saint Quentin-CNRSBatiment Fermat45 Avenue des Etats-Unis78035 Versalles CedexFrance

Magnetometric and ferromagnetic resonance(MFR)measurements have been performed on the polycrystalline multilayered structure,[Gd(7.5 nm)/Co(3 nm)]*** temperature dependence of magnetization of the sample suggests a compensation temperature Tcomp in the region of 240 K,implying that the Co and Gd layers are antiferromagnetically *** FMR curves are strongly temperature dependent,particularly in the vicinity of Tcomp.

关键词： magnetization ferromagnetic polycrystalline

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Status of Soil Zn in Citrus-Cultivated Area of South China

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Pedosphere 1992年第4期2卷 379-382页

作者： oUYANG TAoInstitute of Soil Science, A cademia Sinica. P.o. Box 821, Nanjing 210008 (China)

INTRoDUCTIoN In recent 10 years,citrus production has developed rapidly in *** citrus-cul-tivated area of our country is among the largest and its yield occupies the third place inthe world(Shen,1991).However,in some of our citrus-producing areas the yield is onthe low side and the sugar content of the fruit tends to ***“mosaic”-a physio-

关键词： citrus soil type zinc effect

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Synthesis, Characterization, Antimicrobial and DNA Binding Studies of a Tetradentate N2o2 Amino Acid Schiff Base and Its Coordination Compounds

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Advances in Biological Chemistry 2021年第1期11卷 30-51页

作者： Temitayo o. Aiyelabola Daniel P. otto Johan H. L. Jordaan Ezekiel o. Akinkunmi Idowu olawuni Department of Chemistry Obafemi Awolowo University Ile-Ife Osun State Nigeria Research Focus Area for Chemical Resource Beneficiation Laboratory for Analytical Services North-West University Potchefstroom South Africa Department of Pharmaceutics Obafemi Awolowo University Ile-Ife Osun State Nigeria Department of Biochemistry and Molecular Biology Obafemi Awolowo University Ile-Ife Osun State Nigeria

Aminoethanoic acid undergoes condensation with 1,4-benzenedicarboxaldehyde to form an o, N, N, o donor Schiff base, N,N'-di(carboxymethylene) terephthalaldehyde, Ligand L. Coordination compounds of this Schiff base us... 详细信息

Aminoethanoic acid undergoes condensation with 1,4-benzenedicarboxaldehyde to form an O, N, N, O donor Schiff base, N,N'-di(carboxymethylene) terephthalaldehyde, Ligand L. Coordination compounds of this Schiff base using Ni (II), Cu (II), VO (IV) and Co (II) were then obtained in-situ. The Schiff base and the complexes were evaluated for their antimicrobial and DNA binding abilities. Molecular docking studies of the ligand and synthesized compounds were also carried out. Evidence for the formation of the Schiff base coordination compounds and the coordinating atoms was obtained from 1H NMR, infrared and ultraviolet spectral data, EDX, EDTA complexometric titration and magnetic susceptibility measurement. The results obtained are consistent with octahedral geometry for Ni (II) complex, the metal ion coordinating to one molecule of Ligand L and<

关键词： CT-DNA DNA Binding Antimicrobial Coordination Compound Molecular Docking Schiff Base

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碳排放权与绿色证书交易制度的交互作用

碳排放权与绿色证书交易制度的交互作用

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作者： ALKHALAF ABDULRAHMAN KHALID o 华南理工大学

学位级别：硕士

为满足急剧增长的电力需求和缓解环境压力,可再生能源正大规模接入电网,国内与此配套的碳排放权(emissions trading,ET)交易政策和绿色证书(tradable green certificate,TGC)政策应运而生。通过实施这两项政策,不仅有利于缓解当前的能... 详细信息

为满足急剧增长的电力需求和缓解环境压力,可再生能源正大规模接入电网,国内与此配套的碳排放权(emissions trading,ET)交易政策和绿色证书(tradable green certificate,TGC)政策应运而生。通过实施这两项政策,不仅有利于缓解当前的能源危机,还能对环境污染和可再生能源并网有着积极的影响,特别是在目前国内正大规模推行现货市场的格局下。为此,本文在开放的电力市场环境下,对ET与TGC的交互作用及其经济绩效进行了研究,着重研究了ET和TGC的实施机制和交互关系,通过经济绩效表征其影响效果,论文的主要研究内容和创新成果如下:基于比较静态分析法建立了ET和TGC共同作用于电力市场时的均衡模型,进行了短期、长期的均衡分析,以及短期、长期的ET和TGC市场关联性分析。对于前者,在完全竞争市场模型及其假设条件下,对终端市场、批发市场、绿证交易市场、碳排放权交易市场进行了均衡性分析;对于后者,建立了火力发电商和绿电商供需模型,并基于此求导,从而进行关联性分析。结合系统动力学理论,提出了ET交易电力市场模型、TGC交易电力市场模型,以及ET和TGC共同作用下的电力市场模型,并对此进行分析,刻画出了三个模型的因果关系图和存量流图,并通过情景分析法对其进行了验证与分析。此外,考虑到传统时段型ET和TGC市场出清模式与所辖用户碳排放规律(如用电行为)的连续性不是十分贴切,参考北欧现货市场块出清模式,设计了常规块出清策略和可移动式块出清策略,通过商业型和家庭型碳排放场景验证了二者的有效性。

关键词：碳排放权交易制度绿色证书交易制度经济绩效电力市场出清模式

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基于数据挖掘技术的道路交通流量分析预测研究

基于数据挖掘技术的道路交通流量分析预测研究

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作者： Jo(?)o Agostinho Chingui 长安大学

学位级别：硕士

多年来,道路上的车辆数量大幅增加,特别是在人口密集的地区。这种不正常的增长导致了许多不良的后果,如严重的交通拥堵,过多的二氧化碳排放,出行时间的增加以及人们生活质量的下降。由于运输网络的饱和度和复杂性,必须找到有效的解决方... 详细信息

多年来,道路上的车辆数量大幅增加,特别是在人口密集的地区。这种不正常的增长导致了许多不良的后果,如严重的交通拥堵,过多的二氧化碳排放,出行时间的增加以及人们生活质量的下降。由于运输网络的饱和度和复杂性,必须找到有效的解决方案,使我们能够了解道路交通,并预测交通流的发展变化,以尽量减少其造成的负面影响。通过对道路交通流量的数据分析,有关部门可以指定相应的符合当地路况的政策来提高各个道路的利用率,最终达到解决交通拥堵等问题。最近几年以来,数据挖掘技术在交通流量预测领域发挥着越来越重要的作用。本论文旨在开发一种数据处理方法,通过数据挖掘技术(机器学习)来分析和预测道路流量。为此,对2017年6月10日至17日,英国剑桥自动车牌识别(ANPR)摄像头采集到的所有出行链数据进行了详细的分析。本文首先基于Python编写代码完成数据的初步处理和分析。其次,基于Tableau分析了一周内的交通行为。然后,采用K-Means算法对具有相似特征的元素进行分组,分析交通行为。考虑到在K-Means算法中需要指定群组数量,而这通常被认为是该算法的一个缺陷,本论文利用Elbow方法来确定要形成的群组的适当数量。此外,为了验证K-Means算法创建的群组的合理性,本文应用了Silhouette方法;该方法通过计算Silhouette指数(s(i))以评估群组的分离和压缩程度。最后,使用人工神经网络(Artificial Neural Network,ANN)算法来预测道路交通流量。选择该算法是因为无论是在处理时间还是在准确性方面,其对短期道路流量预测都能呈现出较好的结果。本论文中使用的神经网络架构是多层感知器(Multilayer Perceptron,MPL)和长短期记忆(Long Short-term Memory,LSTM)类型。另外,对于预测模型结果的评估,本研究利用了平均绝对误差(Mean Absolute Error,MAE)、平均平方根误差(Root Mean Squared Error,RMSE)和平均绝对百分比误差(Mean Absolute Percentage,MAPE)等指标。本论文使用的评估指标显示,在多层感知器(MPL)和长短时记忆(LSTM)神经网络架构之间,大多数时候,神经网络架构多层感知器(MPL)的预测结果准确性更高。

关键词：道路交通流量预测数据挖掘 K均值算法多层感知器

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现代氯碱技术

现代氯碱技术

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作者： M.o.·库尔特(M.o. Couilter)

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Structure of the Intermetallic Compound Ni_3Al Synthesized under Compression of the Powder Mixture of Pure Elements Part Ⅰ: Phase Composition and Microstructure of Main Phase

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Journal of Materials Science & Technology 1999年第6期15卷 531-535页

作者： M. V. Fedorischeva, V.E.ovcharenko, o.B.Perevalova and E. V. Kozlov(Institute of Strength Physics and Materials Science, Russian Academy of Sciences, Siberian Branch, Tomsk, Russia) Institute of Strength Physics and Materials Science Russian Academy of Sciences Siberian Branch Tomsk Russian Federation

It was shown by TEM and X-ray analysis that there are four types of grains of the main Ni3Al phase in the structure of the intermetallic obtained by the self-propagation high temperature method (SHS). Every type of grains has its own domain and dislocation structure. There are mono- and polydomains with and without dislocations. The grains of the main phase of monoand polydomains without dislocations and polydomains with dislocations were formed by diffusion in the solid phase. In these conditions NiAl3 phase is located on the grain boundary of the main phase. The Ni2Al3 phase is located at the triple joints of the main phase.

关键词： In Al Structure of the Intermetallic Compound Ni3Al Synthesized under Compression of the Powder Mixture of Pure Elements Part Phase Composition and Microstructure of Main Phase Ni

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