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CD4+ cells as a potential biomarker for cytomegalovirus retinitis in children with acute lymphocytic leukemia

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Chinese Medical Journal 2019年第3期132卷 356-359页

作者： Jian-Cang wang Fei-Fan Du ming Su Xiao-Ge Yang Mei-Jie Quan Xiao-Ying zhai Department of Ophthalmology Hebei Children's HospitalHebei Medical UniversityShijiazhuangHebei 050031China Department of Hematology Hebei Children's HospitalHebei Medical UniversityShijiazhuangHehei 050031China

To the Editor: Infection is one of the causes of death after chemotherapy in children with leukemia. About 20% to 30% acute lymphocytic leukemia (ALL) patients die from infection after chemotherapy.[1] Patients with immune deficiency, under chemotherapy, or treated with immunosuppressor are more inclined to be infected with human cytomegalovirus (HCMV) which leads to severe systematic disorders.[2] Cytomegalvirus retinitis (CMVR) is a major sight threatening disease which mainly occurs in patients with immune deficiency and results in blindness if treatment is delayed. The decrease of CD4+ T cells has been related to CMVR in immune deficiency syndrome like AIDS.[3] However, little is known about the relation between the level of T cells with different markers and the onset of CMVR in ALL patients under chemotherapy. Therefore, this study was designed to investigate the diagnostic value of T cells with different markers for cytomegalovirus retinitis after chemotherapy in patients with ALL.

关键词： cytomegalovirus retinitis acute lymphocytic leukemia CD4+ cells

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含水量对固态胺纤维吸附CO2速率的影响

舰船防化 2009年第5期 19-24页

作者：刘大鑫陈兆文范海明翟密橙王循良中国船舶重工集团公司第七一八研究所

在0.101MPa、温度25℃、CO2含量1.0%条件下,实验测定了含水量0～300%范围内SAF吸附CO2速率,含水量为60%～120%时吸附最快。对低、高含水量工况下水的作用分别进行了讨论,高分子涂层溶胀程度和纤维团堆密度分别是两种状态下影响吸附速率... 详细信息

在0.101MPa、温度25℃、CO2含量1.0%条件下,实验测定了含水量0～300%范围内SAF吸附CO2速率,含水量为60%～120%时吸附最快。对低、高含水量工况下水的作用分别进行了讨论,高分子涂层溶胀程度和纤维团堆密度分别是两种状态下影响吸附速率的主要因素。依据扩散控制模型,推导出了适宜含水量下吸附速率公式,当含水量为100%时,其实验值为13.2 g/(***),约为理论估算值95.0g/(***)的1/7。

关键词：固态胺含水量 CO2 纤维

Production of a novel non-toxicγ-PGA/casein composite hydrogel using MTG and optimization by response surface methodology

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Grain & Oil Science and Technology 2021年第2期4卷 71-80页

作者： Xin wang Chenchen Gou Chunyuan Gao Yazhen Song Jinming Zhang Dandan zhai Yawei Zhao Jihong Huang ming Hui College of Biological Engineering Henan University of TechnologyZhengshou 450001China

Theγ-PGA-based food hydrogel exhibits good biodegradability and biocompatibility,and is non-toxic to *** this study,a novel hydrogel(γ-PGA/casein composite hydrogel)was prepared by combining casein with y-PGA separated from natto using microbial transglutaminase(MTG)as the *** effects of the MTG mass concentration,gelation time,crosslinking temperature,pH,and the mass ratio of y-PGA to casein on the crosslinking ratio of y-PGA and swelling ratio of theγ-PGA/casein hydrogel were ***,the synthesis conditions were optimized by response surface methodology to optimize three important factors,*** temperature,pH and the mass ratio of y-PGA to *** results of single factor experiments showed that the MTG mass concentration and crosslinking time had little impacts on the crosslinking ratio of y-PGA and the swelling ratio;the preferred MTG mass concentration,crosslinking time,temperature and pH were selected as 0.3%,7 h,40℃and 7.5;and the preferred mass ratio ofγ-PGA to casein was 0.1 for the crosslinking ratio ofγ-PGA and 0.2 for the swelling *** response surface experiment results showed that the optimum crosslinking temperature,pH and the mass ratio of y-PGA to casein ratio were 42.4℃,7.33,and 0.18,*** these optimum conditions,the predicted crosslinking ratio of y-PGA and swelling ratio reached 90.35%and 112.07%,which were highly consistent with the experimental values(88.00%and 115.87%).Theγ-PGA/casein composite hydrogel developed in this study shows promising application potential in food industry,biomedical field,and cosmetic industry.

关键词： Hydrogel synthesis MTG cross-linking y-PGA Casein Composite hydrogel

农田裂隙优先流对灌水模式/初始墒情响应机制及其模拟研究

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中国农村水利水电 2024年第2期 56-63,73页

作者：翟亚明王冲王策陈理政付丽红河海大学农业科学与工程学院江苏南京210098 湘西土家族苗族自治州水利局湖南吉首416000 安徽省宣城市宣州区水利局安徽宣城242000

农田灌溉管理过程中优先流降低水肥利用效率,加剧地下水污染风险。基于碘化钾-淀粉染色示踪试验,分析了地面灌DM、微喷灌WP1(20 mm/h)、微喷灌WP2(40 mm/h)处理下的裂隙优先流特征,验证了基于水量平衡的双域渗透模型的有效性,并采用4组... 详细信息

农田灌溉管理过程中优先流降低水肥利用效率,加剧地下水污染风险。基于碘化钾-淀粉染色示踪试验,分析了地面灌DM、微喷灌WP1(20 mm/h)、微喷灌WP2(40 mm/h)处理下的裂隙优先流特征,验证了基于水量平衡的双域渗透模型的有效性,并采用4组初始体积含水率(0.20、0.25、0.30、0.35 cm^(3)/cm^(3))与5组灌水强度(12.0、24.0、36.0、48.0、60.0mm/h)旋转组合设计进行模拟应用分析。结果表明,WP1、WP2处理整体上水分以均匀的基质流形式入渗;DM处理下的土壤剖面染色区域在垂直方向上可明显划分为基质流区(0~6.9 cm)和优先流区(>6.9 cm)。此外,DM处理下的基质流深度、灌水均匀度显著(P<0.05)小于WP1、WP2处理,而其优先流指数及湿润锋弯曲度均极显著大于(P<0.01)WP1、WP2处理,这表明地面灌可以激活更多的优先流路径,增大优先流发育程度和空间异质性,降低灌水质量。基于水量平衡的双域渗透模型可有效预测不同灌水强度下的基质流深度和土壤剖面染色面积比变化趋势(R2≥0.9276、NSE≥0.8844、RSR≤0.0230),初始体积含水率和灌水强度旋转组合设计模拟结果表明,增加灌水强度或减小初始含水率会增加优先流的程度而降低灌水质量,故建议在农田灌溉管理过程中采用“高频少量”的灌水模式以减少优先流导致的水肥利用效率降低。该研究成果可为农田灌溉决策提供理论依据,其试验数据可为优先流模型优化与验证提供重要的数据支撑。

关键词：染色示踪试验优先流灌水强度含水率数值模拟

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战国晋系金文异体字整理与成因探析

现代语文 2024年第1期 38-44页

作者：翟筱雪陕西师范大学文学院陕西西安710100

在王宁汉字构形学理论的指导下,对战国时期晋系金文的异体字形进行梳理,并探究其形成原因。据统计,晋系金文异体字头共计201个,异写字176组,异构字32组。其中,“造”“梁”“明”等7个异体字组,既有异写字,又有异构字。异体字的形成主... 详细信息

在王宁汉字构形学理论的指导下,对战国时期晋系金文的异体字形进行梳理,并探究其形成原因。据统计,晋系金文异体字头共计201个,异写字176组,异构字32组。其中,“造”“梁”“明”等7个异体字组,既有异写字,又有异构字。异体字的形成主要受以下因素的影响:汉字发展的基本规律、汉字的表意性质、民众的审美心理、构件形体相近、书写者的书写习惯与书写材料等。

关键词：晋系金文战国时期异体字异写字异构字

Prevalence and Correlates of Elevated Blood Pressure in Chinese Children Aged 6-13 Years: a Nationwide School-Based Survey

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Biomedical and Environmental Sciences 2015年第6期28卷 401-409页

作者： zhai Yi LI Wei Rong SHEN Chong Frank QIAN SHI Xiao ming Division of Non-communicable Disease Control and Community Health Chinese Center for Disease Control and Prevention Office of Medical Statistics Beijing Friendship Hospital Department of Division of Epidemiology and Biostatistics School of Public HealthNanjing Medical University Center for Global Health University of Chicago Institute of Environmental Health and Related Product Safety Chinese Center for Disease Control and Prevention

Objective To estimate the prevalence of elevated blood pressure（EBP） in Chinese children and identify individual and family factors associated with EBP. Methods A nationwide cross-sectional study was conducted in 2010 using stratified cluster sampling. Participants＇ blood pressure was measured, and their parents completed a questionnaire on personal and family characteristics. Prevalence and correlates of EBP were assessed. Results Among a total of 24,333 participants, 20.2% of boys and 16.3% of girls had EBP. The prevalence of EBP increased with the ascending trend of waist circumference, Waist-to-height ratio, and body mass index. The adjusted prevalence ratios（aP Rs） for obese boys and girls were 2.50 and 2.97, respectively. Fewer urban boys（16.2%） had EBP than rural boys（21.7%）. Boys with a family history of hypertension were 12% more likely to have EBP. Children whose mothers received a college education tended to have lower likelihood of EBP; with an aP R was 0.85 among boys and 0.78 among girls. Conclusion EBP is common among obese students and those who have a family history of hypertension. A negative association between mothers＇ education levels and EBP risk in children was found.

关键词： Elevated blood pressure Waist circumference Waist-to-height ratio Body mass index Children Cross-sectional study China

Extended operation for thoracic malignancies invading superior vena cava and/or innominate vein

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Chinese Medical Journal 2007年第14期120卷 1277-1280页

作者： zhai Chun-bo YU Feng-lei wang Xiang LIU Wen-liang HU Jian-guo LU Wei-dong ZHANG ming Department of Cardiothoracic Surgery Second Xiangya Hospital Central South University Changsha 410011 China

Patients with thoracic malignancies invading the superior vena cava （SVC） and innominate vein that cause venous flow obstruction have a poor quality of lite and short survival time. Dartevelle et al reported that the 3-year survival rates were 27% for patients with mediastinal malignancies and non-small cell lung cancer. Recently, some surgeons＇ experience suggested that the results of extensive resection and reconstruction of the SVC and innominate vein were excellent. From May 2003 to December 2005, radical resection and reconstruction of the SVC and/or innominate vein were performed in a group of patients for mediastinal or lung tumors invading the superior vena cava and/or innominate vein. We reported our experience in this retrospective study to explore the operative method, the optimal vascular graft, and the benefits of extended resection and reconstruction of SVC and/or innominate vein for invasive thoracic tumors.

关键词： mediastinal neoplasms superior vena cava syndrome superior vena cava reconstruction extended operation

A cross-layer approach to enable multipacket transmission in MIMO-SDMA based WLAN

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第2期10卷 271-278页

作者： Sheng-bo CHEN Wei CHEN Wei-lan HUANG Li-jun zhai Xu-ming LIU Department of Electronic Engineering. Tsinghua University Beijing 100084 China Nokia Research Center Beijing 100176 China

We propose a medium access control(MAC) protocol for uplink transmissions in wireless local area networks(WLANs),where both stations and access points(APs) are equipped with multiple antennas. The protocol solves some common problems in utilizing multiple input multiple output(MIMO) under the 802.11 protocol,e.g.,how to deploy preamble(training sequence) used for channel estimation and how to enable simultaneous data transmissions,and facilitates two simultaneous uplink data transmissions via a cross-layer approach. Furthermore,we develop a 3D discrete-time Markov model to analyze the per-formance of the proposed WLAN scheme. The analytical results are verified by simulation,and numerical results show that the system throughput can be significantly improved by our proposed scheme as compared with conventional schemes.

关键词： Multiple input multiple output (MIMO) Medium access control (MAC) Cross-layer design

Crystal structure and some dynamic performances of Ti_(0.25)V_(0.34)Dy_(0.01)Cr_(0.1)Ni_(0.3) hydrogen storage electrode

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Chinese Chemical Letters 2011年第1期22卷 93-96页

作者： Yu Qing Qiao Min Shou Zhao Qiu ming Zhang Jing zhai College of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004 China

Crystal structure and some dynamic performances of Zi0.25V0.34Dy0.01Cr0.1Ni0.3 hydrogen storage electrode alloy have been investigated by XRD, FESEM-EDS, TEM and EIS measurements. The result shows that the alloy is mainly composed of V-based solid solution phase with body-centered-cubic structure and mono-crystal Ni3Ti phase with hexagonal structure （Space grope： P63/ mmc）, and it was first observed as TiNi-based secondary phase. The higher charge transfer resistance, higher apparent activation energy and lower hydrogen diffusion coefficient are reasons for the poor electrochemical activity of the dehydriding kinetics of Ti- V-Cr-Ni hydride alloy.

关键词： Hydrogen storage electrode alloy Ni-MH battery V-Based solid solution