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Vertical transmission of hepatitis B virus:propositions and future directions

Chinese Medical Journal 2021年第23期134卷 2825-2831页

作者： Jin-Feng Liu Tian-Yan Chen Ying-ren zhao Department of Infectious Diseases The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi 710061China Shaanxi Clinical Research Center of Infectious Diseases Xi’anShaanxi 710061China.

Chronic hepatitis B virus(HBV)infection due to vertical transmission remains a critical concern with regards to eliminating HBV *** of hepatitis B vaccine,the foundation to prevent perinatal and horizontal transmission,has reduced the prevalence of HBV by>80%.In countries where the hepatitis B immune globulin(HBIG)is available,such as China and the United States,the administration of HBIG and hepatitis B vaccine to the infants of mothers who are positive for hepatitis B surface antigen has become a standard practice and is effective in preventing vertical *** evidence on the efficacy and safety of antiviral prophylaxis during pregnancy indicates the probability of attaining the goal of the World Health Organization to eliminate hepatitis by *** this review,we discuss the transmission routes,diagnostic criteria,and preventive strategies for vertical transmission.A preventive program that includes screening before pregnancy,antiviral prophylaxis during pregnancy,and postpartum immunoprophylaxis provides“perfect strategies”to eliminate vertical ***,there is still a notable gap between“perfect strategies”and real-world application,including insufficient coverage of timely birth dose vaccine and the efficacy and necessity of HBIG,especially in mothers who are negative for hepatitis B envelope *** particular,there is a clear need for a comprehensive long-term safety profile of antiviral ***,feasible and cost-effective preventive strategies need to be determined across *** also needs to be scaled up to meet the demands for prophylaxis and prevalence targets.

关键词： Hepatitis B virus Vertical transmission Immunoprophylaxis Antiviral prophylaxis

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Determination of Ge in Au alloys using sodium hypophosphite and potassium iodate potentiometric titration method

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Rare Metals 2020年第12期39卷 1492-1496页

作者： Shou-Li Han Xiao-Tang He Jun-Mei Guo zhao-Ying ren Li-Ya Zhu Liang-Wei Chen Qing-Nan Shi Jia-Hong Yi School of Materials Science and Engineering Kunming University of Science and TechnologyKunming650093China State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals Sino-Platinum Metals Resources(Yimen)Co.Ltd.Yimen651100China

This paper presents a new method of determining Ge in AuGe alloys by potassium iodate(KIO3)potentiometric titration when Ge(Ⅱ)and Au(0)are simultaneously reduced from Ge(Ⅳ)and Au(Ⅲ)by sodium hypophosphite rather than by distillation *** influences of such conditions as the reduction acidity,the dosage of sodium hypophosphite and the reduction time on the determination of Ge were *** in AuGe alloys such as AuGe_(12),AuGeNi_(12-2),AuAgGe_(18.8-12.5),and AuAgGeNi_(43.8-6-0.2)was measured with the relative standard deviation(RSD)of 0.10%-0.31%and the recoveries of added standard Ge in sample of 99.40%-100.40%under the conditions of 0.40-0.80 mol·L^(-1)HCl,3.3 mol·L^(-1)H^(3)PO^(4),15 g sodium hypophosphite,and reduction time of40 *** new method presented is of high accuracy in results,good stability and sensibility in end-point,and easy operation and strong selectivity of determination.

关键词： Ge determination AuGe alloy Sodium hypophosphite Potassium iodate Potentiometric titration

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Development of EST-PCR Markers for the Chromosome 4V of Haynaldia villosa and Their Application in Identification of 4V Chromosome Structural Aberrants

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Journal of Integrative Agriculture 2014年第2期13卷 282-289页

作者： zhao ren-hui WANG Hai-yan JIA Qi XIAO Jin YUAN Chun-xia ZHANG Ya-jun HU Qing-shan WANG Xiu-e State Key Laboratory of Crop Genetics and Germplasm Enhancement Cytogenetics InstituteNanjing Agricultural University

EST-PCR based molecular markers specific for alien chromosomes are not only useful for the detection of the introgressed alien chromatin in the wheat background, but also provide evidence of the syntenic relationship between homoeologous chromosomes. In the present study, in order to develop high density and evenly distributed molecular markers on chromosome 4V of Haynaldia villosa, a total of 607 primer pairs were designed according to the EST sequences, which were previously located in 23 different bins of wheat chromosomes 4A, 4B and 4D. By using the Triticum durum-H, villosa amphiploid and T. aestivum-H, villosa alien chromosome lines involving chromosome 4V, it was found that 9.23% of the tested primers could amplify specific bands for chromosome 4V. Thirty and twenty-six specific markers could be assigned to chromosome arms 4VS and 4VL, respectively. These 4V specific markers provided efficient tools for the characterization of structural variation involving the chromosome 4V as well as for the selection of useful genes located on chromosome 4V in breeding programs.

关键词： Haynaldia villosa molecular marker Triticum aestivum chromosome engineering

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Study on Doped DLC Films Deposited by Pulse Arc Technology

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稀有金属材料与工程 2011年第S4期40卷 243-245页

作者： zhao Dongcai,ren Ni,Ma Zhanji,Xiao Gengjie,Wu Shenghu Science and Technology on Surface Engineering Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China Lanzhou Inst Phys Sci & Technol Surface Engn Lab Lanzhou 730000 Peoples R China

The bonds of metal and carbon don't form in metal-doped DLC films which be deposited by pulse arc facility for the condition of low temperature and alternate *** hardness and internal stress decreases as the doped content increase,the good luck is that the stress decreases more *** the friction coefficient increase as the doped content *** the Si was doped,Si-C bonds has been formed,and the hardness of films keep constant as the Si content under 6.7%,so the properties of mechanic have been improved by doping *** Si doped target be used in film deposition process,atoms of Si and C were deposited at one time,so that the Si-C bond formed.

关键词： Diamond like carbon doped pulse arc deposition mechanics properties

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First-principles study of structural stability and elastic property of pre-perovskite PbTiO_3

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Chinese Physics B 2012年第1期21卷 352-356页

作者： Liu Yong Ni Li-Hong ren zhao-Hui Xu Gang Li Xiang Song Chen-Lu Han Gao-Rong State Key Laboratory of Silicon Materials Department of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Angstrom Center Institute of Inorganic and Nonmetal MaterialsZhejiang UniversityHangzhou 310027China

The structural stability and the elastic properties of a novel structure of lead titanate, which is named pre- perovskite PbTiO3 （PP-PTO） and is constructed with TiO6 octahedral columns arranged in a one-dimensional manner, are investigated by using first-principles calculations. PP-PTO is energetically unstable compared with conventional perovskite phases, however it is mechanically stable. The equilibrium transition pressures for changing from pre- perovskite to cubic and tetragonal phases are -0.5 GPa and -1.4 GPa, respectively, with first-order characteristics. Further, the differences in elastic properties between pre-perovskite and conventional perovskite phases are discussed for the covalent bonding network, which shows a highly anisotropic character in PP-PTO. This study provides a crucial insight into the structural stabilities of PP-PTO and conventional perovskite.

关键词： elastic properties phase transition density-functional theory PbTiO3

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Radiation spectrum of a high-dimensional rotating black hole

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Science China(Physics,Mechanics & Astronomy) 2010年第3期53卷 504-507页

作者： zhao ren, LI HuaiFan, ZHANG LiChun & WU YueQin Institute of Theoretical Physics, Shanxi Datong University Department of Physics, Shanxi Datong University, Datong 037009, China 1. Institute of Theoretical Physics Shanxi Datong University Datong 037009 China

This study extends the classical Damour-Ruffini method and discusses Hawking radiation in a (n + 4)-dimensional rotating black hole. Under the condition that the total energy and angular momentum of spacetime are conservative, but angular momentum a = J/M of unit mass of the black hole is variable, taking into consideration the reaction of the radiation of the particle to the spacetime, a new Tortoise coordinate transformation and discuss the black hole radiation spectrum is discussed. The radiation spectrum that satisfies the unitary principle in the general case is derived.

关键词： Damour-Ruffini method Hawking radiation Tortoise coordinate transformation high-dimensional rotating spacetime

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Static globularization and grain morphology evolution ofαandβphases during annealing of hot-rolled TC21 titanium alloy

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Transactions of Nonferrous Metals Society of China 2021年第9期31卷 2664-2676页

作者： Ke WANG Ming-yu WU zhao ren Yu ZHANG ren-long XIN Qing LIU International Joint Laboratory for Light Alloys(MOE) College of Materials Science and EngineeringChongqing UniversityChongqing 400044China

A lamellar-structure TC21 titanium alloy was hot-rolled and subsequently annealed at 820,880 and 940℃ for 1 and 6 h,and the effects of annealing parameters on static globularization and morphology evolution of bothαandβphases were *** results show thatαglobularization process is sluggish due to the limited boundary splitting at 820℃.With increasing temperature to 880℃,the accelerated boundary splitting and termination migration promote theα*** 820 and 880℃,the static recovery(SRV)and recrystallization(SRX)induce the grain refinement of interlamellarβ***,the excessively high temperature of 940℃ results in the coarsening ofαgrains due to the assistance of Ostwald ripening,and produces coarseβgrains mainly due to the absence of SRX in interlamellarβ***,880℃ is an appropriate annealing temperature to produce a homogeneous microstructure in which globularizedαand refinedβgrains distribute homogeneously.

关键词： TC21 titanium alloy αglobularization recrystallization grain refinement

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Amino sulfonate amphoteric surfacatants synthesized by grease from natural product

Amino sulfonate amphoteric surfacatants synthesized by greas...

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中国化学会第十二届全国天然有机化学学术会议

作者： zhao-Hua ren Jing Huang College of Chemistry and Environmental Engineering Yangtze University

Amino acid type amphoteric surfactants belong to green chemicals and have been used more and more extensively to many fields including medical treatment（such as solubilizer,sterilization and disinfection）,high-end personal care（such as shampoo,facial mask,infant skin care product）,silk dyeing and finishing,leather treatment,mineral flotation,oil exploitation,*** from natural products such as castor oil,tung oil,palm oil,*** treated by the processes of hydrolysis,amidation,sulfonation as depicted in Fig.1 and then are translated into the aim product,amino sulfonate amphoteric *** surfactant molecules contain a sulfonic acid group and at least two amino ***,the sulfonic acid group and these amino group can locate in the main chain of surfactant,or they or one of them can act as the side chain,all of which lie on the need for the properties of *** type of surfactants are characteristic of readily biodegradation,low toxicity,low irritation to skin,benign softness,exquisite foam,antibacterial property,corrosion inhibition,better compatibility,*** far,the related outcomes about the type of surfactants include 5 patents for invention（3 of which have been authorized）,more than 20 papers collected by SCI（which released in AIChE Journal,***.,*** ***.E.,etc.）,and 3 science and technology awards at ministerial and provincial-level.

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静态傅里叶变换光谱仪的机理及干涉条纹的校正

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光谱学与光谱分析 2008年第9期28卷 2067-2072页

作者：林凌任钊李刚精密测试技术及仪器国家重点实验室天津大学精密仪器与光电子工程学院天津300072

针对高速、瞬时光谱测量要求光谱仪的结构简单、装备方便、实时性强的特点,文章介绍了一种静态傅里叶变换光谱仪,并对其原理进行了推导与剖析。针对其调整中出现的干涉条纹的倾斜校正问题,进行了详细的理论分析和干涉条纹模型的数学推导... 详细信息

针对高速、瞬时光谱测量要求光谱仪的结构简单、装备方便、实时性强的特点,文章介绍了一种静态傅里叶变换光谱仪,并对其原理进行了推导与剖析。针对其调整中出现的干涉条纹的倾斜校正问题,进行了详细的理论分析和干涉条纹模型的数学推导,得出倾斜镜旋转参数和光学元件最小通光口径之间的数学关系,以及倾斜镜旋转参数和干涉条纹旋转参数之间的数学关系。通过利用Matlab7.0数学工具,对所总结推导的干涉条纹模型进行模拟,对所得的各种参数之间的数学关系进行验证。分析结果表明据此数学关系所求得的β角校正精度达到1.4%,是一种有效可行的校正方法。

关键词：静态型傅里叶变换光谱仪干涉条纹倾斜校正干涉条纹模型

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CO2对硅酸钠-丙烯酰胺溶液聚合行为及产物性质的影响

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高等学校化学学报 2009年第3期30卷 596-600页

作者：赵仁保中国石油大学北京石油工程教育部重点实验室提高采收率研究中心北京102249

研究了不同CO2分压下低浓度丙烯酰胺（AM）在硅酸钠溶液中的聚合反应行为，用环境扫描电子显微镜、流变仪及激光粒度仪等研究了产物的微观结构及其流变特性．结果表明，随着CO2浓度的增加，产物的储能模量增加，即黏弹性增大；反应后生... 详细信息

研究了不同CO2分压下低浓度丙烯酰胺（AM）在硅酸钠溶液中的聚合反应行为，用环境扫描电子显微镜、流变仪及激光粒度仪等研究了产物的微观结构及其流变特性．结果表明，随着CO2浓度的增加，产物的储能模量增加，即黏弹性增大；反应后生成的硅酸凝胶镶嵌在聚丙烯酰胺高分子凝胶网格中形成了复杂的网状结构．在超声波作用下，硅酸凝胶颗粒从体系中脱离，检测到的颗粒粒径范围在280～900nm之间，且随着超声时间的增加，颗粒的平均粒径减小．结果表明，CO2的存在使得AM及交联剂的分子扩散速度增加，提高了AM分子之间及其与交联剂分子的接触几率，从而提高了产物的分子量．

关键词：二氧化碳地质埋存丙烯酰胺硅酸钠复合凝胶

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