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Meningoencephalitis due to Listeria monocytogenes in a Young Immunocompetent Patient: Case Report with Literature Review
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作者 Janette Alejandra Gamiño Gutierrez Gustavo Adolfo Hernández Valdez +7 位作者 Arleth Anahí Montaño Gómez Jorge Morales Rojas Graciela Gaddy Robles Martinez Anahi Herrera Ruelas Alin Kaori Ferreyra Gudiño Jocelin Celeste Jurado Cardona Jimena Jexabeth Ibáñez Núñez Anahí Fierros Ramos 《Advances in Infectious Diseases》 CAS 2024年第1期213-219,共7页
Meningoencephalitis secondary to Listeria monocytogenes (L. monocytogenes) mainly affects newborns, the elderly and immunocompromised people;there are extremely rare cases in which said infection occurs in immunocompe... Meningoencephalitis secondary to Listeria monocytogenes (L. monocytogenes) mainly affects newborns, the elderly and immunocompromised people;there are extremely rare cases in which said infection occurs in immunocompetent individuals. We present the case of a young adult patient without immunocompromise, who developed meningoencephalitis due to L. monocytogenes;This case is exceptional, since it occurred in an individual outside the classic age group, in addition to not having risk factors, which is why it should be considered an atypical causal agent. 展开更多
关键词 MENINGITIS ENCEPHALITIS Rhombencephalitis Listeria monocytogenes IMMUNOCOMPETENT
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La-Co掺杂对锶铁氧体磁导率减落的影响 被引量:3
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作者 刘先松 徐小兵 +1 位作者 黄凯 Pablo Hernández-Gómez 《磁性材料及器件》 CAS CSCD 2007年第6期19-21,共3页
采用陶瓷法制备了La3+-Co2+取代的M型锶铁氧体Sr1-xLaxFe12-xCoxO19(x=0.05~0.2)。用X射线衍射仪对粉末样品的结构进行了观测,磁导率减落测量用计算机辅助系统的阻抗自动测量仪(LCR电桥)来完成。系统地研究了La3+-Co2+取代对M型锶铁氧... 采用陶瓷法制备了La3+-Co2+取代的M型锶铁氧体Sr1-xLaxFe12-xCoxO19(x=0.05~0.2)。用X射线衍射仪对粉末样品的结构进行了观测,磁导率减落测量用计算机辅助系统的阻抗自动测量仪(LCR电桥)来完成。系统地研究了La3+-Co2+取代对M型锶铁氧体结构和磁导率的影响。在80~500K温度范围内进行去磁处理,测量结果用等时曲线表示,实验结果表明,在纯的M型锶铁氧体中没有发现磁导率减落现象,掺杂La3+-Co2+后的系列样品中均发现了较为明显的磁导率减落现象,在样品中观察到了三个吸收蜂,这证实了掺杂取代后有少量的Fe2+离子产生和杂质磁性Co2+离子进入六角晶体的晶位中。 展开更多
关键词 M型锶铁氧体 La^3+-Co^2+取代 磁导率减落
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脉冲离散Ginzburg-Landau方程组的统计解及其极限行为
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作者 赵才地 姜慧特 +1 位作者 李春秋 Tomas Caraballo 《数学物理学报(A辑)》 CSCD 北大核心 2022年第3期784-806,共23页
该文研究脉冲离散Ginzburg-Landau方程组的统计解及其极限行为.文章首先证明该脉冲离散方程组的全局适定性,接着证明由解算子生成的过程存在拉回吸引子和一族Borel不变概率测度,然后给出该脉冲离散方程组统计解的定义并证明其存在性.该... 该文研究脉冲离散Ginzburg-Landau方程组的统计解及其极限行为.文章首先证明该脉冲离散方程组的全局适定性,接着证明由解算子生成的过程存在拉回吸引子和一族Borel不变概率测度,然后给出该脉冲离散方程组统计解的定义并证明其存在性.该文的结果揭示了脉冲系统的统计解只分段地满足Liouville型定理.最后,文章证明了脉冲离散Ginzburg-Landau方程组的统计解收敛于脉冲离散Schr?dinger方程组的统计解. 展开更多
关键词 统计解 脉冲微分方程 LIOUVILLE型定理 离散耦合Ginzburg-Landau方程 离散Schrodinger方程
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三维不可压Navier-Stokes方程组轨道统计解的退化正则性 被引量:2
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作者 徐明月 赵才地 Tomás Caraballo 《数学物理学报(A辑)》 CSCD 北大核心 2021年第2期336-344,共9页
该文研究三维自治不可压Navier-Stokes方程组轨道统计解的退化正则性.作者证明了当该方程组的外力项具有H^(-1)正则性且Grashof数小于2.057时它的弱轨道统计解退化成具有部分正则性的统计解.同时也证明了当外力项具有L^(2)正则性且Gras... 该文研究三维自治不可压Navier-Stokes方程组轨道统计解的退化正则性.作者证明了当该方程组的外力项具有H^(-1)正则性且Grashof数小于2.057时它的弱轨道统计解退化成具有部分正则性的统计解.同时也证明了当外力项具有L^(2)正则性且Grashof数小于2.057时它的轨道统计解退化成强轨道统计解. 展开更多
关键词 轨道统计解 退化正则性 三维不可压Navier-Stokes方程组 轨道吸引子 Grashof数
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经直肠超声联合血清PSA在经会阴前列腺穿刺活检诊断前列腺癌中的价值 被引量:4
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作者 李金 罗乐 郑红 《四川生理科学杂志》 2020年第3期277-280,共4页
目的:探讨经直肠超声(Tranrectal ultrasound,TRUS)检查联合血清前列腺特异性抗原(Prostate specific antigen,PSA)在经会阴前列腺穿刺活检诊断前列腺癌(Prostate cancer,PCA)中的临床意义。方法:对我院2016年6月至2018年11月收治的203... 目的:探讨经直肠超声(Tranrectal ultrasound,TRUS)检查联合血清前列腺特异性抗原(Prostate specific antigen,PSA)在经会阴前列腺穿刺活检诊断前列腺癌(Prostate cancer,PCA)中的临床意义。方法:对我院2016年6月至2018年11月收治的203例疑诊前列腺癌患者,回顾分析经直肠超声检查图像特征和经会阴前列腺穿刺活检结果与血清PSA间的关系。结果:203例血清PSA增高的患者中,检出前列腺癌患者110例,检出率为54.19%。超声图像特征越明显,前列腺癌穿刺活检的检出率越高(P<0.05)。随着血清PSA值增高以及年龄的增长,前列腺癌穿刺活检的检出率增高(P<0.05)。术后出现肉眼血尿19例(9.35%),发热3例(1.48%),迷走神经反射1例(0.05%),尚未出现严重并发症的患者。结论:经直肠超声联合血清PSA水平行直肠超声引导下前列腺穿刺活检,对临床诊断早期前列腺癌具有重要的参考价值。 展开更多
关键词 经直肠超声 前列腺癌 活检 血清前列腺特异抗原
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慢病毒介导5HRE-CEAp调控RASSF1A表达对胃癌细胞SGC7901抑制的研究 被引量:1
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作者 周培华 赵玉生 +6 位作者 郑新 宋鸣 朱委 王威 王志 冯伟 孙学军 《现代肿瘤医学》 CAS 2018年第13期1989-1993,共5页
目的:探讨5拷贝低氧反应元件(5HRE)联合癌胚抗原启动子(CEAp)调控抑癌基因RAS相关域家族1A(RASSF1A)的慢病毒载体(LV-5HRE-CEAp-RASSF1A)对胃癌细胞SGC7901的体外抑制作用。方法:采用qRT-PCR方法检测空白对照组细胞SGC7901、阴性对照组... 目的:探讨5拷贝低氧反应元件(5HRE)联合癌胚抗原启动子(CEAp)调控抑癌基因RAS相关域家族1A(RASSF1A)的慢病毒载体(LV-5HRE-CEAp-RASSF1A)对胃癌细胞SGC7901的体外抑制作用。方法:采用qRT-PCR方法检测空白对照组细胞SGC7901、阴性对照组细胞SGC7901/NC及慢病毒载体感染的实验组细胞SGC7901/5HRE-CEAp-RASSF1A中RASSF1A mRNA表达水平;通过CCK-8实验检测各组细胞的生长曲线;通过流式细胞技术检测各细胞的凋亡及细胞周期。结果:qRT-PCR结果显示,与其他组比较,实验组细胞的RASSF1A mRNA水平在低氧条件下明显升高(P<0.01);CCK-8实验结果显示从第3天开始,低氧条件下实验组细胞的OD值开始低于其它各组细胞(P<0.05);流式细胞检测结果显示与其它各组细胞比较,低氧条件下实验组细胞凋亡比例明显增加(P<0.01),并且其细胞周期G1期的细胞百分比明显增加(P<0.05)。结论:慢病毒载体LV-5HRE-CEAp-RASSF1A具有在低氧诱导下显著抑制胃癌细胞株SGC7901增殖的作用。 展开更多
关键词 5拷贝低氧反应元件 癌胚抗原启动子 RAS相关域家族1A基因 胃癌 基因治疗
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Effect of Organic Manure Application on Physical Properties and Humus Characteristics of Paddy Soil 被引量:9
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作者 DOUSEN CHENEN-FENG 《Pedosphere》 SCIE CAS CSCD 1994年第2期127-135,共9页
Long-term field experiment was established in 1978 on a coastal paddy soil to determine the effect of applicationof pig manure, rice straw and chemical N fertilizer on the physical property and humus characteristics o... Long-term field experiment was established in 1978 on a coastal paddy soil to determine the effect of applicationof pig manure, rice straw and chemical N fertilizer on the physical property and humus characteristics of soil . Resultsshowed that the porosity, the microstructural coefficient, the reactivities of organic C and N, the ΔlogK value, thedegree of oxidation stability, the contents of O-alkyl C and alkyl C, and the ratio of aliphatic C to aromatic C ofhumic acid from soils received organic manure increased, whereas, the ratio of < 10 μm to >10 μm ofmicroaggregates, the humification degree of humus, the degree of organo-mineral complexation, the number-averagemolecular weight, the C/ H ratio. the contents of carboxyl and aromatic C of HAs in them decreased. These resultsindicated that the application of organic manure not only improved the physical property of the paddy soil but alsomade the HA more aliphatic in structure and younger in origin. 展开更多
关键词 humic acid organic manure poddy soil. structural characteristics
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Multiphasic characterization of a plant growth promoting bacterial strain, Burkholderia sp.7016 and its effect on tomato growth in the field 被引量:13
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作者 GAO Miao ZHOU Jian-jiao +3 位作者 WANG En-tao CHEN Qian XU Jing SUN Jian-guang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2015年第9期1855-1863,共9页
Aiming at searching for plant growth promoting rhizobacteria (PGPR), a bacterium strain coded as 7016 was isolated from soybean rhizosphere and was characterized in the present study. It was identiifed as Burkholderia... Aiming at searching for plant growth promoting rhizobacteria (PGPR), a bacterium strain coded as 7016 was isolated from soybean rhizosphere and was characterized in the present study. It was identiifed as Burkholderia sp. based on 16S rDNA sequence analysis, as wel as phenotypic and biochemical characterizations. This bacterium presented nitrogenase activity, 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity and phosphate solubilizing ability;inhibited the growth of Sclerotinia sclerotiorum, Gibberel a zeae and Verticil ium dahliae;and produced smal quantities of indole acetic acid (IAA). In green house experiments, signiifcant increases in shoot height and weight, root length and weight, and stem diameter were observed on tomato plants in 30 d after inoculation with strain 7016. Result of 16S rDNA PCR-DGGE showed that 7016 survived in the rhizosphere of tomato seedlings. In the ifeld experiments, Burkholderia sp. 7016 enhanced the tomato yield and signiifcantly promoted activities of soil urease, phosphatase, sucrase, and catalase. Al these results demonstrated Burkholderia sp. 7016 as a valuable PGPR and a candidate of biofertilizer. 展开更多
关键词 PGPR Burkholderia sp. multiphasic characterization promoting growth BIOFERTILIZER
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MULTIPLIERS AND RELATIVE COMPLETION IN WEIGHTED LORENTZ SPACES 被引量:2
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作者 CenapDuyar A.TuranGuerkanli 《Acta Mathematica Scientia》 SCIE CSCD 2003年第4期467-476,共10页
Let G be a locally compact Abelian group with Haar measure μ. In the present paper, first the authors discussed some properties of weighted Lorentz space. Then they defined the relative completion A of a subspace A o... Let G be a locally compact Abelian group with Haar measure μ. In the present paper, first the authors discussed some properties of weighted Lorentz space. Then they defined the relative completion A of a subspace A of the weighted Lorentz space, and showed that the space of the multipliers from L_w~1,(G) to A is algebrically isomorphic and homeomorphic to A. 展开更多
关键词 Banach module weighted L~P(G) space Lorentz space weighted Lorentz space MULTIPLIER
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Circulating leptin and its muscle gene expression in Nellore cattle with divergent feed efficiency 被引量:5
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作者 Lúcio Flávio Macedo Mota Cristina Moreira Bonafé +8 位作者 Pamela Almeida Alexandre Miguel Henrique Santana Francisco JoséNovais Erika Toriyama Aldrin Vieira Pires Saulo da Luz Silva Paulo Roberto Leme JoséBento Sterman Ferraz Heidge Fukumasu 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2018年第1期228-232,共5页
Background: Leptin has a strong relation to important traits in animal production, such as carcass composition,feed intake, and reproduction. It is mainly produced by adipose cells and acts predominantly in the hypot... Background: Leptin has a strong relation to important traits in animal production, such as carcass composition,feed intake, and reproduction. It is mainly produced by adipose cells and acts predominantly in the hypothalamus.In this study, circulating leptin and its gene expression in muscle were evaluated in two groups of young Nellore bulls with divergent feed efficiency. Individual dry matter intake(DMI) and average daily gain(ADG) of 98 Nellore bulls were evaluated in feedlot for 70 d to determinate the residual feed intake(RFI) and select 20 animals for the high feed efficient(LRFI) and 20 for the low feed efficient(HRFI) groups. Blood samples were collected on d 56 and at slaughter(80 d) to determine circulating plasma leptin. Samples of Longissimus dorsi were taken at slaughter for leptin gene expression levels.Results: DMI and RFI were different between groups and LRFI animals showed less back fat and rump fat thickness,as well as less pelvic and kidney fat weight. Circulating leptin increased over time in all animals. Plasma leptin was greater in LRFI on 56 d and at slaughter(P = 0.0049). Gene expression of leptin were greater in LRFI animals(P = 0.0022) in accordance with the plasma levels. The animals of the LRFI group were leaner, ate less, and had more circulating leptin and its gene expression.Conclusion: These findings demonstrated that leptin plays its physiological role in young Nellore bulls, probably controlling food intake because feed efficient animals have more leptin and lower residual feed intake. 展开更多
关键词 Beef cattle Energy homeostasis Fat depositon Residual feed intake
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Imaging performance evaluation in depth-of-interaction PET with a new method of sinogram generation:A Monte Carlo simulation study 被引量:1
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作者 XIA Yan MA Tianyu +3 位作者 LIU Yaqiang SUN Xishan WANG Shi SHAO Yiping 《Nuclear Science and Techniques》 SCIE CAS CSCD 2011年第3期144-150,共7页
In conventional PET systems,the parallax error degrades image resolution and causes image distortion.To remedy this,a PET ring diameter has to be much larger than the required size of field of view(FOV),and therefore ... In conventional PET systems,the parallax error degrades image resolution and causes image distortion.To remedy this,a PET ring diameter has to be much larger than the required size of field of view(FOV),and therefore the cost goes up.Measurement of depth-of-interaction(DOI)information is effective to reduce the parallax error and improve the image quality.This study is aimed at developing a practical method to incorporate DOI information in PET sinogram generation and image reconstruction processes and evaluate its efficacy through Monte Carlo simulation.An animal PET system with 30-mm long LSO crystals and 2-mm DOI measurement accuracy was simulated and list-mode PET data were collected.A sinogram generation method was proposed to bin each coincidence event to the correct LOR location according to both incident crystal indices and DOI positions of the two annihilation photons.The sinograms were reconstructed with an iterative OSMAPEM(ordered subset maximum a posteriori expectation maximization)algorithm.Two phantoms(a rod source phantom and a Derenzo phantom)were simulated,and the benefits of DOI were investigated in terms of reconstructed source diameter(FWHM)and source positioning accuracy.The results demonstrate that the proposed method works well to incorporate DOI information in data processing,which not only overcomes the image distortion problem but also significantly improves image resolution and resolution uniformity and results in satisfactory image quality. 展开更多
关键词 蒙特卡罗模拟 PET 性能评价 图像分辨率 LSO晶体 成像 图像失真 图像质量
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Numerical Analysis of Slag Carry-Over during Molten Steel Draining 被引量:1
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作者 Daniel Flores-Sanchez Miguel A. Barron 《Open Journal of Applied Sciences》 2017年第11期611-616,共6页
Slag carry-over during the draining of molten steel from a teeming ladle is numerically studied here. Two-phase isothermal transient 3D Computational Fluid Dynamics simulations were employed to simulate the draining p... Slag carry-over during the draining of molten steel from a teeming ladle is numerically studied here. Two-phase isothermal transient 3D Computational Fluid Dynamics simulations were employed to simulate the draining process. Two nozzle diameters, two nozzle positions and three slag heights were considered. From mass balances, the slag carry-over in terms of mass flow rate was obtained for each of the above variables. Besides, the draining times of the teeming ladle were estimated from theoretical considerations and CDF simulations, and compared. 展开更多
关键词 CFD Simulations Draining Time MULTIPHASE Flow SLAG Carry-Over Teeming LADLE
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Non-Painful Peripheral Inflammation Blocks Conditioned Place-Preference to Morphine and Nicotine through an Ibuprofen-Sensitive and an Ibuprofen Insensitive Pathway 被引量:1
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作者 Marco Antonio Sotomayor-Sobrino Abraham Ochoa-Aguilar +4 位作者 Eda Patricia Tenorio Martha León-Olea Roberto Velasco-González Israel Luna-Mendoza Claudia Gómez-Acevedo 《Journal of Behavioral and Brain Science》 2018年第2期57-76,共20页
The field of neuroimmunology has expanded in recent years providing new insights and therapies into pathologies like stroke, autism, and depression. However, few works explore the relationship between inflammatory sti... The field of neuroimmunology has expanded in recent years providing new insights and therapies into pathologies like stroke, autism, and depression. However, few works explore the relationship between inflammatory stimuli and motivation. Thus, the aim of this study was to determine how non-painful inflammatory stimuli affect reward. To test reward-response, we used the morphine and the nicotine induced conditioned place-preference and place-aversion model in rats with non-painful inflammation. The following inflammatory models were used: non-painful infectious inflammation: 24 hrs prior to conditioning sessions, an injection with Calmette-Guerin bacillus (CGB) 1 × 107 cfu, ip, was administered. Non-painful non-infectious inflammation: 24 hrs prior to conditioning sessions, rats’ sciatic nerve was blocked and cut, followed by the injection of carrageenan (750 μl) in the paw. We then measured the cytokine concentration to determine the inflammatory profile of each of our models. Finally, we administered ibuprofen to determine if it could prevent the effect of inflammation over conditioned place-preference. We show that carrageenan significantly reduced the morphine-induced reward. Non-painful inflammatory stimulus, CGB and denervation + carrageenan, inhibit the conditioned place-preference to morphine and nicotine, CGB also block conditioned place-aversion to nicotine;carrageenan has no effect on CPA. The administration of ibuprofen reinstates conditioned place-preference to morphine and nicotine in the carrageenan model, but has no effect in the CGB model;finally ibuprofen has no effect on CPA. Our data suggest that non-painful-inflammatory stimuli inhibit the reward system, independent of cytokine concentration. Furthermore, the administration of a PGE 2 inhibitor can importantly modulate this phenomenon. 展开更多
关键词 Reward ADDICTION Pain INFLAMMATION PROSTAGLANDINS Interferon
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Dynamic Modelling of Dengue Epidemics in Function of Available Enthalpy and Rainfall 被引量:2
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作者 Hugo Abi Karam Julio Cesar Barreto da Silva +1 位作者 Augusto José Pereira Filho José Luis Flores Rojas 《Open Journal of Epidemiology》 2016年第1期50-79,共30页
In this work, we present results of an investigation of environmental precursors of infectious epidemic of dengue fever in the Metropolitan Area of Rio de Janeiro, RJ, Brazil, obtained by a numerical model with repres... In this work, we present results of an investigation of environmental precursors of infectious epidemic of dengue fever in the Metropolitan Area of Rio de Janeiro, RJ, Brazil, obtained by a numerical model with representation of infection and reinfection of the population. The period considered extend between 2000 and 2011, in which it was possible to pair meteorological data and the reporting of dengue patients worsening. These data should also be considered in the numerical model, by assimilation, to obtain simulations of Dengue epidemics. The model contains compartments for the human population, for the vector Aedes aegypti and four virus serotypes. The results provide consistent evidence that worsening infection and disease outbreaks are due to the occurrence of environmental precursors, as the dynamics of the accumulation of water in the breeding and energy availability in the form of metabolic activation enthalpy during pre-epidemic periods. 展开更多
关键词 Modelling Dengue Epidemics Environmental Enthalpy Environmental Precursors of Dengue Epidemics
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The periodic wave solutions for the generalized Nizhnik-Novikov-Veselov equation 被引量:18
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作者 张金良 任东锋 +2 位作者 王胆亮 王跃明 方宗德 《Chinese Physics B》 SCIE EI CAS CSCD 2003年第8期825-830,共6页
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ON SOLVABILITY OF A BOUNDARY VALUE PROBLEM FOR A NONHOMOGENEOUS BIHARMONIC EQUATION WITH A BOUNDARY OPERATOR OF A FRACTIONAL ORDER 被引量:2
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作者 A.S.BERDYSHEV A.CABADA B.Kh.TURMETOV 《Acta Mathematica Scientia》 SCIE CSCD 2014年第6期1695-1706,共12页
This paper is concerned with the solvability of a boundary value problem for a nonhomogeneous biharmonic equation. The boundary data is determined by a differential operator of fractional order in the Riemann-Liouvill... This paper is concerned with the solvability of a boundary value problem for a nonhomogeneous biharmonic equation. The boundary data is determined by a differential operator of fractional order in the Riemann-Liouville sense. The considered problem is a generalization of the known Dirichlet and Neumann problems. 展开更多
关键词 biharmonic equation boundary value problem fractional derivative the RiemannLiouville operator
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Studies on the Antioxidant Potential of Extracts from Unripe Fruit of Carica papaya 被引量:1
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作者 Omotade Oloyede Daniel Roos Joao Rocha 《Journal of Life Sciences》 2012年第1期41-47,共7页
The antioxidant activities of the ethyl acetate fraction and aqueous extract of unripe fruit of Carica papaya were compared and investigated in vitro using thiobarbituric reactive species (TBARS) assay, total phenol... The antioxidant activities of the ethyl acetate fraction and aqueous extract of unripe fruit of Carica papaya were compared and investigated in vitro using thiobarbituric reactive species (TBARS) assay, total phenol content, evaluation of reactive oxygen species (ROS) in liver mitochondria, Fe2+ chelating and 2,2-diphenyl-lpicrylhydrazyl (DPPH) scavenging activities. Both extracts had high antioxidant properties and could inhibit FeE+ and sodium nitroprusside lipid peroxidation in the liver. Total phenol content of ethyl acetate fraction and aqueous extract were 4.50 ±2.26 and 1.21±3.12 mg/g, respectively. Both extracts had a maximal effect at the lowest concentrations tested (15 μg/mL for ethyl acetate and 150 μg/mL for the aqueous). Ethyl acetate fraction showed that the highest values of antioxidant activity is probably associated with its high phenolic content, Fe2+ chelating and DPPH scavenging activities. It is therefore concluded that ethyl acetate fraction and to a less extent the aqueous fractions are potent inhibitor of lipid peroxidation. 展开更多
关键词 Carica papaya thiobarbituric reactive species antioxidant activity lipid peroxidation.
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Convective Rainfall in Lake Victoria Watershed and Adjacent Equatorial Africa 被引量:2
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作者 Felipe Vemado Augusto José Pereira Filho 《Atmospheric and Climate Sciences》 2021年第3期373-397,共25页
An integrated satellite precipitation estimation dataset, namely, the Climate Prediction Center morphing method (CMORPH), was used to analyze precipitation regimes across Equatorial Africa between 3<span style=&quo... An integrated satellite precipitation estimation dataset, namely, the Climate Prediction Center morphing method (CMORPH), was used to analyze precipitation regimes across Equatorial Africa between 3<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span><span><span><span style="font-family:;" "=""><span style="font-family:Verdana;">S - 1</span><span style="font-family:Verdana;"><span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"=""><span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span></span></span><span style="font-family:Verdana;">N and 24</span><span style="font-family:Verdana;"><span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"=""><span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span></span></span><span style="font-family:Verdana;">E - 42</span><span style="font-family:Verdana;"><span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"=""><span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span></span></span><span style="font-family:Verdana;">E from 2000 to 2014. This region includes the Rift Valley, part of the Congo Forest, and the Lake Victoria (LV) basin, the second largest lake in the area of the world. Hovm<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#FFFFFF;">&#246;</span></span>ller diagrams were obtained for all organized convective systems to estimate their spans, duration, and phase speeds. The analysis included 33,189 episodes of westward propagating convective systems. Within the study area, lake and land breezes tend to trigger convection and precipitation over LV as well as mountain-valley circulation trigger thunderstorms over the mountains east of LV and western Rift Valley. The statistics of convective systems streaks on longitude-time diagrams were obtained for yearly frequencies of starting and ending longitudes and times among other morphologic variables. Results indicate organized precipitation episodes tend to move westward across Rift valley and Congo forest with an average phase speed of 10.3 <span style="white-space:normal;font-family:Verdana;">m<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"="">·</span>s</span><sup style="white-space:normal;"><span style="font-family:Verdana;"><span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#FFFFFF;">&#45;</span></span></span><span style="font-family:Verdana;">1</span></sup></span><sup><span style="font-family:Verdana;"></span></sup><span style="font-family:Verdana;">. More than 50% of them are triggered over LV and propagate more than 600 km at an average phase speed of 12.1 m<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"="">·</span>s</span><sup><span style="font-family:Verdana;"><span style="white-space:normal;color:#4F4F4F;font-family:-apple-system, " font-size:16px;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#FFFFFF;">&#45;</span></span><span style="font-family:Verdana;white-space:normal;"></span></span><span style="font-family:Verdana;">1</span></sup><span style="font-family:Verdana;">. These convective systems tend to produce high rainfall rates hundreds of kilometers away into the Congo Forest. Half of all episodes of organized convection analyzed have phase speeds between 8 <span style="white-space:normal;font-family:Verdana;">m<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"="">·</span>s</span><sup style="white-space:normal;"><span style="font-family:Verdana;"><span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#FFFFFF;">&#45;</span></span></span><span style="font-family:Verdana;">1</span></sup></span><sup><span style="font-family:Verdana;"></span><span style="font-family:Verdana;"></span></sup><span style="font-family:Verdana;"> and 16 <span style="white-space:normal;font-family:Verdana;">m<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#f7f7f7;"="">·</span>s</span><sup style="white-space:normal;"><span style="font-family:Verdana;"><span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;background-color:#f7f7f7;"=""><span style="color:#4F4F4F;font-family:-apple-system, "font-size:16px;white-space:normal;background-color:#FFFFFF;">&#45;</span></span></span><span style="font-family:Verdana;">1</span></sup></span><sup><span style="font-family:Verdana;"></span><span style="font-family:Verdana;"></span></sup><span style="font-family:Verdana;">, lasting 8 hr to 16 hr. Most precipitating systems start east of LV and west of Rift Valley in the afternoon to early morning and propagates less than 400 km. Finally, hourly precipitation accumulation and lightning density analysis indicate three preferable regions for convective initiation: 1) The mountain range east of LV;2) Midwest of LV, and;3) The Congo Forest mountain range.</span></span></span></span> 展开更多
关键词 Lake Victory Precipitation Deep Convection Diurnal Cycle CMORPH
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Hepatitis C virus molecular evolution:Transmission,disease progression and antiviral therapy 被引量:9
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作者 Maria Victoria Preciado Pamela Valva +8 位作者 Alejandro Escobar-Gutierrez Paula Rahal Karina Ruiz-Tovar Lilian Yamasaki Carlos Vazquez-Chacon Armando Martinez-Guarneros Juan Carlos Carpio-Pedroza Salvador Fonseca-Coronado Mayra Cruz-Rivera 《World Journal of Gastroenterology》 SCIE CAS 2014年第43期15992-16013,共22页
Hepatitis C virus(HCV)infection represents an important public health problem worldwide.Reduction of HCV morbidity and mortality is a current challenge owned to several viral and host factors.Virus molecular evolution... Hepatitis C virus(HCV)infection represents an important public health problem worldwide.Reduction of HCV morbidity and mortality is a current challenge owned to several viral and host factors.Virus molecular evolution plays an important role in HCV transmission,disease progression and therapy outcome.The high degree of genetic heterogeneity characteristic of HCV is a key element for the rapid adaptation of the intrahost viral population to different selection pressures(e.g.,host immune responses and antiviral therapy).HCV molecular evolution is shaped by different mechanisms including a high mutation rate,genetic bottlenecks,genetic drift,recombination,temporal variations and compartmentalization.These evolutionary processes constantly rearrange the composition of the HCV intrahost population in a staging manner.Remarkable advances in the understanding of the molecular mechanism controlling HCV replication have facilitated the development of a plethora of direct-acting antiviral agents against HCV.As a result,superior sustained viral responses have been attained.The rapidly evolving field of anti-HCV therapy is expected to broad its landscape even further with newer,more potent antivirals,bringing us one step closer to the interferon-free era. 展开更多
关键词 Hepatitis C virus EVOLUTION PHYLOGENETICS Drug resistance Clinical outcome
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