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超声评价优秀排球运动员的旋肱后动脉:动脉瘤发病率、解剖、分支模式及血管特点

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国际医学放射学杂志 2017年第3期 353-353页

作者： D.van de pol M.Maas A.Terpstra M.Pannekoek-Hekman s.Alaeikhanehshir P.P.Kuijer 李海鸥 Department of Radiology Academic Medical Center/University of Amsterdam

摘要目的确定优秀排球运动员旋肱后动脉(PCHA)动脉瘤的流行病学以及旋肱后动脉和肱深动脉(DBA)的血管特征。方法 280位运动员接受了优势臂血管超声检查的标准化评估。评估内容包括PCHA动脉瘤的直径(血管矢状径增宽超过150%为动脉瘤)、P... 详细信息

摘要目的确定优秀排球运动员旋肱后动脉(PCHA)动脉瘤的流行病学以及旋肱后动脉和肱深动脉(DBA)的血管特征。方法 280位运动员接受了优势臂血管超声检查的标准化评估。评估内容包括PCHA动脉瘤的直径(血管矢状径增宽超过150%为动脉瘤)、PCHA和DBA的解剖、分支情况及其走行和直径。结果超声检查中,PCHA和DBA分别有100%和93%(260/280)可被识别。PCHA动脉瘤的患病率为4.6%(13/280)。所有动脉瘤都发生于起自腋动脉(AA)的PCHA的近心端。81%(228/280)的受检者PCHA起自AA,其中

关键词：动脉瘤血管旋肱后动脉受检者排球球类运动发病率分支运动员体育工作者

草类木素的氨化反应Ⅰ.草类制浆黑液中木素的纯化与结构分析

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中国造纸学报 2001年第2期16卷 96-100页

作者：林鹿 C.L.Chen J.s.Gratzl 詹怀宇华南理工大学制浆造纸工程国家重点实验室广州510641 DepartmentofWoodandPaperscience NorthCarolinaStateUniversityRaleighUSA

纯化实验表明 ,纯化的麦草碱木素PTL的元素组成为 :C(6 2 6 1) ,H(5 71) ,O(31 6 8) ,OCH3(15 5 0 ) ,较高的羟甲基含量表明该木素分子缩合程度较高。FPLC分析表明 ,PTL的相对分子质量范围是 35 0 0～ 10 0 0。13C NMR谱图显示PTL有... 详细信息

纯化实验表明 ,纯化的麦草碱木素PTL的元素组成为 :C(6 2 6 1) ,H(5 71) ,O(31 6 8) ,OCH3(15 5 0 ) ,较高的羟甲基含量表明该木素分子缩合程度较高。FPLC分析表明 ,PTL的相对分子质量范围是 35 0 0～ 10 0 0。13C NMR谱图显示PTL有明显的特征性峰 :15 2 4ppm的s型单元C3/C5信号 ,15 0～ 10 4ppm区域的G或s型单元芳香环不同位置上C原子信号 ;10 4～ 76ppm、72～ 6 4ppm及 6 0 4ppm的G或s型单元C7或C9信号 ;此外 ,与有机溶剂木素pol相比 ,PTL在δC16 8 1ppm、76 0～ 73 0ppm、6 3 2ppm和 <40ppm区域的多糖结构信号很弱 ,显示大部分以木聚糖结构为主的半纤维素成分在蒸煮过程中被除去了。1H 13C 2D NMRHMQC谱图显示PTL有显著的 β O 4结构中的α位、β位和γ位的化学位移信号δC/δH71.0～ 71 5 / 4 1～ 4 7、84 5～ 85 5 / 4 2～ 4 6ppm和 6 0 /3 3～ 3 5ppm ;反映对羟苯基 (C—OH)结构的芳香烃—OCH2 —CH2 OH化学位移信号δC/δH6 9 5～ 6 9 5 / 3 2 8～3 5

关键词：氨化反应羟甲基 CH2O 缩合苯基谱图芳香环木素制浆黑液蒸煮过程

solution of stochastic Van der pol Equation Using spectral Decomposition Techniques

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Applied Mathematics 2020年第3期11卷 184-202页

作者： Maha Hamed Ibrahim L. El-Kalla Mohamed A. El-Beltagy Beih s. El-desouky Department of Mathematics Faculty of Science Mansoura University Mansoura Egypt Department of Engineering Mathematics & Physics Faculty of Engineering Mansoura University Egypt Department of Engineering Mathematics & Physics Faculty of Engineering Cairo University Giza Egypt

In this paper, we introduce the study of the general form of stochastic Van der pol equation (sVDP) under an external excitation described by Gaussian white noise. The study involves the use of Wiener-Chaos expansion technique (WCE) and Wiener-Hermite expansion (WHE) technique. The application of these techniques results in a system of deterministic differential equations (DDEs). The resulting DDEs are solved by the numerical techniques and compared with the results of Monte Carlo (MC) simulations. Also, we introduce a new formula that facilitates handling the cubic nonlinear term of van der pol equations. The main results of this study are: 1) WCE technique is more accurate, programmable compared with WHE and for the same order, WCE consumes less time. 2) The number of Gaussian random variables (GRVs) is more effective than the order of expansion. 3) The agreement of the results with the MC simulations reflects the validity of the forms obtained through theorem 3.1.

关键词： Van der pol Oscillator Wiener-Chaos Expansion Wiener-Hermite Expansion Limit Cycle White Noise Damping Force

Novel Pectin/Chia-Mucilage Membranes:Human serum Albumin Adsorption,Biocompatibility,and Physical-Chemical Properties

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Journal of Renewable Materials 2023年第6期11卷 2647-2663页

作者： s.E.Burruel-Ibarra R.A.Esquer-Osuna R.G.Valdez-Melchor D.A.Cuevas-Acuña L.Quihui-Cota J.Juárez J.C.Campos-García E.Valbuena-Gregorio M.A.López-Mata Departamento de Investigación en polímeros y Materiales Universidad de SonoraHermosilloSonoraMéxico Departamento de Ciencias de la salud Campus CajemeUniversidad de SonoraCd.ObregónSonoraMéxico Departamento de Nutrición Pública y salud Coordinación de NutriciónCentro de Investigación en Alimentación y DesarrolloA.C.HermosilloSonoraMéxico Departamento de Física Universidad de SonoraHermosilloSonoraMéxico

This study aimed to characterize the physical-chemical and biological properties of pectin(PC)/chia seed mucilage(CM)***/CM[100/0(control),80/20%,60/40%,and 40/60%w/w]membranes were prepared using the casting *** membranes(PC/CM)were thin,yellow,lightly opaque(≈10%)and capable of blocking light UVB(between 66 at 52%).sEM analysis showed the presence of aggregates in the shape of a sphere(≈13μm)and ovoid(≈25μm).The proportion of 80/20 showed an increase in tensile strength(29%)and elastic modulus(19%)when compared to the *** analysis exhibited intermolecular interactions between PCPC,PC-CM,and CM-CM in the *** thermal analysis(600°C)showed a slight improvement in the percentage of residual mass-loss of 3.31%(80/20)that *** 40/60 membrane showed the lowest percentage of hemolysis(2.94%)but limited human albumin adsorption *** results suggested that the blend PC/CM may be considered as a biomaterial for medical applications.

关键词： Pectin chia mucilage membrane hemolysis albumin biomaterial

Utility of a Relatively Affordable In-House HIV-1 Genotyping Assay for Drug Resistance Testing among Non B HIV-1 Infected Drug Naive Patients in Nigeria

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Advances in Microbiology 2018年第5期8卷 355-365页

作者： J. A. Anejo-Okopi H. Onywera I. O. Abah A. O. Ebonyi O. O. Agbaji A. P. Agaba s. Oguche O. s. Olonitola J. A. Idoko Department of Microbiology University of Jos Jos Nigeria AIDs Prevention Initiative in Nigeria Jos University Teaching Hospital Jos Nigeria HIV-Research Laboratory Kenya Medical Research Institute Kisumu Kenya Department of Pharmacy Jos University Teaching Hospital Jos Nigeria Department of Pediatrics University of Jos Jos Nigeria Department Medicine University of Jos Jos Nigeria Department Family Medicine University of Jos Jos Nigeria Department of Microbiology Ahmadu Bello University Zaria Nigeria

Background: The introduction of antiretroviral (ARV) in resource-limited settings has increased life expectancy among non-B HIV-1 infected individuals. We used a validated In-house genotyping assay to characterize non-B HIV-1 and to determine drug resistance mutations among treatment-naive patients. Methods: Plasma samples from 105 HIV-1 infected drug-naive adult patients attending a tertiary hospital Jos, Nigeria were subjected to HIV-1 RNA extraction, reverse transcription amplification, and population-based sequencing of the partial pol gene on the ABI 3130xl genetic analyzer. subtyping and phylogenetic analyses were performed by REGA subtyping Tool v2.0 and MEGA v5.0 respectively. Drug resistance profiles were evaluated according to IAs-UsA 2013 drug resistance mutations list. Result: One hundred samples (95.2%) were successfully genotyped. The distribution of the non-B HIV-1 subtypes were;CRF02_AG-48%, G-41.0%, CRF06_cpx-6.0%, and A-5.0%. Ten percent of the isolates had at least one major drug resistance mutation in the pol gene. The drug-class specific resistance prevalences were 6.0% for NRTIs;M41L-1.0%, K65KR-1.0%, M184IM-1.0%, M184V-2.0%, and T215ADNT-1%, 8.0% for NNRTIs;K103N-2%, 1.0% for K101E, E138A, G190A, P225HP, Y181I, Y188L, Y181C including protease inhibitors’ Q58E (1.0%). Conclusion: HIV-1 was heterogeneously distributed;CRF02_AG and G predominate and some known major mutations associated with NRTIs and NNRTIs were determined. The In-house assay is suitable for both characterization of non-B HIV-1 subtypes and detection of drug resistance at a significant lower cost than available commercial genotyping assays. This finding underscores the need to consider use of low-cost In-house genotyping assay as an alternative in resource-limited settings with non-B HIV-1 epidemic.

关键词： HIV-1 Antiretroviral Therapy Drug Resistance Genotyping Affordable In-House

3个不同类型甜菜栽培品种的产量和品质(英文)

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南方农业学报 2011年第2期42卷 137-141页

作者： AbdEl-Razek A M Besheit s Y 埃及农业部农业研究中心糖料作物研究所开罗吉萨12619

【目的】比较鉴别3个不同类型甜菜品种的产量和品质,以期为在农业产业中的应用提供参考。【方法】分别于2008～2009、2009～2010年度,在埃及KaferEl-sheikh省(北三角洲)sakha试验站对分属于3种不同形态分化类型E(Ertrag)、Z(Zucker)和N(... 详细信息

【目的】比较鉴别3个不同类型甜菜品种的产量和品质,以期为在农业产业中的应用提供参考。【方法】分别于2008～2009、2009～2010年度,在埃及KaferEl-sheikh省(北三角洲)sakha试验站对分属于3种不同形态分化类型E(Ertrag)、Z(Zucker)和N(Normal)的每4个甜菜栽培品种进行两个田间试验。【结果】E类型甜菜的平均块根重和块根产量显著高于Z和N类型的,但Z类型的转光度(蔗糖分)、出糖率(可榨出糖百分比)、回收率最高,而杂质和糖蜜糖最低。此外,糖产量是产量和品质两方面结合的结果,在3个甜菜类型中,糖产量以Farida最高、Lp11最低。此外,在2个年度的试验中,3个类型的每费丹(4200m^2)糖产量均以Farida(E类型)、Glereos(Z类型)和Kawemira(N类型)3个品种最高。【结论】在所有甜菜类型中,N类型甜菜品种的块根产量和糖含量在所有类型表现居中,种植此类型甜菜品种,可使农民和糖厂都获得较大的利益。

关键词：甜菜类型栽培品种产量品质

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某钢管厂退役场地土壤重金属污染特征分析

安全与环境工程 2015年第4期22卷 75-81页

作者：罗泽娇李冉 Mohammed A.s.Abdalla 中国地质大学生物地质与环境地质国家重点实验室湖北武汉430074 巴赫立大学农学院土壤与水科学系

选择武汉某钢管厂退役场地土壤为研究对象，通过采集场地土壤样品，测试了样品的pH值以及锌、铜、铅和镍等重金属元素含量，分析了重金属污染物在该区域土壤中的水平与垂直分布特征，查明了土壤受重金属污染的现状，并揭示了生产布局等... 详细信息

选择武汉某钢管厂退役场地土壤为研究对象，通过采集场地土壤样品，测试了样品的pH值以及锌、铜、铅和镍等重金属元素含量，分析了重金属污染物在该区域土壤中的水平与垂直分布特征，查明了土壤受重金属污染的现状，并揭示了生产布局等污染源、地表特征和土层分布特征对土壤重金属污染的影响。结果表明：研究区域土壤主要受到铬、铜、铅、镍、锌的污染，但以电镀生产所产生的重金属污染最为严重，电镀锌引起的污染最为突出；重金属污染严重区域主要集中在镀锌炉烟囱、三废利用车间及废水处理车间，土壤中锌的最高浓度达23700mg／kg，超出湖北省土壤背景值最大值的83％；其他车间除靠近电镀区域的花坛内表层土壤受到一定程度的锌污染外，其余部位土壤受污染较少；土壤铬、铜、铅、镍的污染深度一般为0．2～0．4m，污染的最大深度达到1．2m；锌在大部分点位污染深度达到0．8m，有的甚至达到1．4m，主要局限在回填土层和原始沉积土层的表层，其污染物迁移到原始黏土层后，高浓度污染区域在黏土内垂向上迅速衰减，锌平均衰减量为14000mg／（kg·m）。该研究可为同类型场地土壤金属污染调查、修复提供参考依据。

关键词：土壤重金属污染锌污染某钢管厂退役场地

Total control-based unified allocation model for allowable basin water withdrawal and sewage discharge

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science China(Technological sciences) 2010年第5期53卷 1387-1397页

作者： HU siYi1,2,WANG ZongZhi1,WANG YinTang1 & ZHANG LingLing3 1 state Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China 2 Ministry of Water Resources,the People’s Republic of China,Beijing 100053,China 3 school of Public Administration,HoHai University,Nanjing 210098,China state Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute Ministry of Water Resources the People"s Republic of China

In this paper,a new model with a total amount control target of allowable water withdrawal based on initial water right is built for the implementation of initial water right allocation scheme as well as unified allocation for allowable water withdrawal and sewage *** model couples the water allocation simulation model and the computational model of permissible pol-lution bearing *** view of the model complexity,a new technology which synthesizes system simulation,iterative reservoir turns and intelligent computation is proposed to improve the operability of allocation scheme and computational *** the Beijiang River Basin in the Pearl River Basin as an example,the study explains the model establishment,solution and application,and draws an optimized operation graph of large-scale *** study also obtains a long-term operation strategy of river basin water resources system,the allocation schemes of allowable water withdrawal and sewage discharge in a typical year and the flow hydrographs of trans-boundary *** validity of the model and the allocation rationality are analyzed as well.

关键词： water resources management total control unified control of water withdrawal and sewage discharge optimized regulation integration technology

基于改进尾流振子模型的超长拉索涡激振动特性数值研究

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中国公路学报 2019年第10期32卷 257-265页

作者：周旭辉韩艳王磊蔡春声廖楚峰长沙理工大学土木工程学院湖南长沙410114 路易斯安那州立大学路易斯安那巴吞鲁日LA70803

为了研究大跨度斜拉桥超长拉索在不同流场特性下的高阶多模态涡激振动问题,以牛顿定律为基础,建立了考虑张力变化以及垂度效应的拉索结构振子方程,引入改进的Van Der pol式尾流振子模型,以加速度耦合两非线性振子,提出了一种简便的拉索... 详细信息

为了研究大跨度斜拉桥超长拉索在不同流场特性下的高阶多模态涡激振动问题,以牛顿定律为基础,建立了考虑张力变化以及垂度效应的拉索结构振子方程,引入改进的Van Der pol式尾流振子模型,以加速度耦合两非线性振子,提出了一种简便的拉索涡激振动流固耦合预报模型;采用二阶中心差分法,对两振子方程在空间域和时间域进行离散迭代求解,编制了拉索涡激振动的MATLAB计算程序,并验证了其可靠性。该方法为研究拉索涡激振动提供了一种新思路,可解决风洞试验和数值软件(CFD)不便模拟大长细比拉索结构的问题。基于提出的预报模型,以1根330 m超长拉索为研究对象,分析了拉索多模态涡激振动特性,探讨了不同流场特性对拉索涡激振动的影响。研究结果表明:均匀流作用下,拉索发生涡激锁定现象,以单一模态发生振动,随着风速的增加,拉索涡激锁定区间增大而最大振幅不发生改变;剪切流作用下,拉索发生多模态涡激振动,位移响应呈现"拍"的特点,振动频率分布在strouhal涡脱频率范围内,存在2个或3个主导频率,主导频率全程参与振动,非主导频率间歇参与振动;拉索多模态涡激振动位移响应表现为行波-驻波并存的状态,随着风剖面指数的增加,涡激振动行波效应显著。

关键词：桥梁工程超长拉索尾流振子模型多模态涡激振动二阶中心差分法行波效应