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改良的qPCR检测水痘-带状疱疹病毒的临床应用

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中国现代医学杂志 2020年第24期30卷 13-17页

作者：钟婷婷任虎席瑞阑许飏绵阳市第三人民医院(四川省精神卫生中心)皮肤科四川绵阳621000 西南医科大学附属医院皮肤科四川泸州646000

目的分析改良的qPCR与水痘-带状疱疹病毒(VZV)DNA试剂盒检测VZV DNA的检出率,并进一步探讨其临床应用。方法选取2017年5月—2017年7月在西南医科大学附属医院就诊的带状疱疹患者31例。利用患者疱液提取标准品,并根据VZV DNA保守序列ORF5... 详细信息

目的分析改良的qPCR与水痘-带状疱疹病毒(VZV)DNA试剂盒检测VZV DNA的检出率,并进一步探讨其临床应用。方法选取2017年5月—2017年7月在西南医科大学附属医院就诊的带状疱疹患者31例。利用患者疱液提取标准品,并根据VZV DNA保守序列ORF59制备引物以设计一种改良的qPCR。对比该方法与试剂盒检测VZV DNA的效果后,用该方法测定伐昔洛韦抗病毒治疗前后外周血单个核细胞(PBMC)和血浆VZV DNA的阳性率。结果患者疱液提取的标准品大小为395 bp。经测序并与VZV DNA进行比对,标准品被匹配上的碱基数占比99%。该qPCR的标准曲线决定系数R2=0.9999,回归方程Y=-3.9367X+45.07,其中X为Log值,Y为Ct值。改良的qPCR与VZV DNA试剂盒检测PBMC中VZV DNA阳性率均为73.3%。治疗前后PBMC与血浆的VZV DNA阳性率比较,差异均无统计学意义(P>0.05)。PBMC和血浆在治疗前与治疗后的VZV DNA阳性率比较,差异无统计学意义(P>0.05)。结论改良的qPCR与VZV DNA试剂盒的检测效果相近,且血浆可替代PBMC作为检测标本。该方法具有经济、快捷的优势,值得临床推广应用。

关键词：水痘疱疹,带状水痘-带状疱疹病毒标本血浆

中国1960—2019年体感温度的时空变化及其风险分析

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气候变化研究进展 2024年第3期20卷 265-277页

作者：陈婷婷余文君李艳忠白鹏星寅聪黄曼捷邵伟南京信息工程大学水文与水资源工程学院南京210044 水利部水文气象灾害机理与预警重点实验室南京210044 中国科学院地理科学与资源研究所/中国科学院陆地水循环及地表过程重点实验室北京100101

体感温度(Apparent Temperature,AP)描述了人体实际感受到的温度。文中基于我国1960—2019年的空气温度、相对湿度和风速等气象要素数据,估算并分析了4个典型气候区(湿润区、过渡区、干旱区和青藏高原)AP的时空变化格局及其高温风险。... 详细信息

体感温度(Apparent Temperature,AP)描述了人体实际感受到的温度。文中基于我国1960—2019年的空气温度、相对湿度和风速等气象要素数据,估算并分析了4个典型气候区(湿润区、过渡区、干旱区和青藏高原)AP的时空变化格局及其高温风险。结果发现:(1)在空间分布上,AP由东南沿海向西北内陆递减,平均AP值由湿润区(约为17.0℃)逐渐向干旱区(约为7.0℃)和青藏高原区(约为0.6℃)递减;(2)全国AP呈现显著上升的趋势,4个典型气候区的上升速率分别为0.29℃/(10 a)、0.27℃/(10 a)、0.15℃/(10 a)和0.13℃/(10 a);(3)气温变化对AP的贡献率最高,约为92.4%,其次是风速及相对湿度,约为5.6%和2.0%;(4)典型气候区的高温风险天数变化呈现空间异质性,湿润区和青藏高原大部分地区均呈现显著增长趋势。

关键词：体感温度(AP) 时空变化中国气候区归因分析风险分析

Process design and intensification of multicomponent azeotropes special distillation separation via molecular simulation and system optimization

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Chinese Journal of Chemical Engineering 2024年第7期71卷 24-44页

作者： Chunliang Liu Jianhui zhong Ranran Wei Jiuxu Ruan Kaicong Wang Zhaoyou Zhu Yinglong Wang Limei zhong College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China

This work provides an overview of distillation processes,including process design for different distillation processes,selection of entrainers for special distillation processes,system integration and intensification of distillation processes,optimization of process parameters for distillation processes and recent research progress in dynamic control ***,the feasibility of using thermodynamic topological theories such as residual curve,phase equilibrium line and distillation boundary line to analyze different separation regions is discussed,and the rationality of distillation process design is discussed by using its ***,the application of molecular simulation methods such as molecular dynamics simulation and quantum chemical calculation in the screening of entrainer is discussed for the extractive distillation *** thermal coupling mechanism of different distillation processes is used to explore the process of different process ***,a mixed integer nonlinear optimization strategy for the distillation process based on different algorithms is ***,the improvement of dynamic control strategies for different distillation processes in recent years is *** work focuses on the application of process intensification and system optimization in the design of distillation process,and analyzes the challenges,prospects,and development trends of distillation technology in the separation of multicomponent azeotropes.

关键词： Azeotrope separation Process design Optimization algorithm Process integration Dynamic control Entrainer selection

Super-high bed sintering for iron ores:behaviors,causes and solutions of horizontal segregation on strand

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Journal of Iron and Steel Research International 2024年第7期31卷 1590-1596页

作者： Liang-ping Xu Hui-bo Liu zhong-lin Dong Qiang zhong Yu-chao Zhao Guang-hui Li School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina

Horizontal segregation has been a constraint to the development and application of super-high bed *** eliminate the horizontal segregation of super-high bed sintering,several typical sintering machines were sampled and analyzed,and theoretical calculation was made to compare the bed depth and their differences in different areas within the mixture ***,solutions were proposed and applied to a 265 m^(2) sintering *** results showed that the horizontal seg-regation of the 265 m^(2) sintering machine was dominated by particles larger than 8 mm with horizontal segregation degree of 0.48,while 360 and 550 m^(2) sintering machines were affected by 5-8 mm and 1-3 mm particles with horizontal segregation degree of 0.27 and 0.31,*** analysis indicated the different segregation distribution results from the matching of the bed depth of each area within the mixture ***,the horizontal segregation degree not larger than 0.06 was achieved by optimizing the time parameters and the division of three zones on the 265 m^(2) sintering machine.

关键词： Super-high bed sintering Horizontal segregation Feeder Particle distribution Agglomeration

Preparing lipid nanoparticles with tunable drug loading capacity and morphology via improved sequential nanoprecipitation

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Science China Chemistry 2024年第5期67卷 1373-1374页

作者： Haoran Wang Ben zhong Tang Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Department of Chemistry.Institute of Molecular Functional MaterialsState Key Laboratory of NeuroscienceDivision of Biomedical Engineering and Division of Life ScienceThe Hong Kong University of Science and TechnologyHong Kong 999077China School of Science and Engineering Shenzhen Institute of Aggregate Science and Technology The Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Shenzhen 518172China

Nanotechnology hailed as a revolutionary new technology of the 21st century, has ignited a wave of innovation across diverse fields spanning chemistry, physics, materials science,medicine, engineering, and electronics. In 2016, Nature published an article titled “The nanolight revolution is coming”, underscoring that “virus-sized particles that emit light in every color could transform applications ranging from television displays to cancer treatment”.

关键词： sized loading treatment

BSEC Method for Unveiling Open Clusters and its Application to Gaia DR3:83 New Clusters

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Research in Astronomy and Astrophysics 2024年第5期24卷 169-184页

作者： zhong-Mu Li Cai-Yan Mao Institute of Astronomy and Information Dali UniversityDali 671003China

Open clusters(OCs) are common in the Milky Way, but most of them remain undiscovered. There are numerous techniques, including some machine-learning algorithms, available for the exploration of OCs. However, each method has its limitations and therefore, different approaches to discovering OCs hold significant values. We develop a comprehensive approach method to automatically explore the data space and identify potential OC candidates with relatively reliable membership determination. This approach combines the techniques of Hierarchical Density-Based Spatial Clustering of Applications with Noise, Gaussian mixture model, and a novel cluster member identification technique, color excess constraint. The new method exhibits efficiency in detecting OCs while ensuring precise determination of cluster memberships. Because the main feature of this technique is to add an extra constraint(EC) for the members of cluster candidates using the homogeneity of color excess,compared to typical blind search codes, it is called Blind Search-Extra Constraint(BSEC) method. It is successfully applied to the Gaia Data Release 3, and 83 new OCs are found, whose color–magnitude diagrams(CMDs) are fitted well to the isochrones. In addition, this study reports 621 new OC candidates with discernible main sequence or red giant branch. It is shown that BSEC technique can discard some false negatives of previous works, which takes about three percentage of known clusters. It shows that as an EC, the color excess(or twocolor) constraint is useful for removing fake cluster member stars from the clusters that are identified from the positions and proper motions of stars, and getting more precise CMDs, when differential reddening of member stars of a cluster is not large(e.g., ΔE(G_(BP)-G_(RP)) < 0.5 mag). It makes the CMDs of 15% clusters clearer(in particular for the region near turnoff) and therefore is helpful for CMD and stellar population studies. Our result suggests that the color excess con

关键词： Galaxy stellar content-(Galaxy:)open clusters and associations general-stars fundamental parameters

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狗枣猕猴桃离体培养和快速繁殖研究

安徽农业科学 2017年第17期45卷 116-118,128页

作者：吕海燕赵婷婷钟彩虹中国科学院武汉植物园中国科学院特色农业重点实验室湖北武汉430074

[目的]研究狗枣猕猴桃离体培养和快速繁殖技术。[方法]以狗枣猕猴桃幼嫩带芽茎段、幼嫩叶片及叶柄作为外植体,研究其组织培养整个过程,建立快速高效的狗枣猕猴桃快繁体系。[结果]器官发生途径最适宜的外植体为幼嫩叶片。筛选出最适宜腋... 详细信息

[目的]研究狗枣猕猴桃离体培养和快速繁殖技术。[方法]以狗枣猕猴桃幼嫩带芽茎段、幼嫩叶片及叶柄作为外植体,研究其组织培养整个过程,建立快速高效的狗枣猕猴桃快繁体系。[结果]器官发生途径最适宜的外植体为幼嫩叶片。筛选出最适宜腋芽一步成苗的培养基配方为MS+1.25 mg/L 6-BA+0.250 mg/L NAA,腋芽萌发率达92.90%,通过对无菌苗进行生根诱导试验,筛选出最佳生根培养基为1/2MS+0.2 mg/L NAA,生根率100%,平均根数12.5条。[结论]该研究为狗枣猕猴桃产业化生产及优良种质资源的保存工作提供了理论和技术支撑。

关键词：狗枣离体培养快速繁殖

Super-high bed sintering for iron ores: inhomogeneous phenomena and its mechanism during mineralizing

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Journal of Iron and Steel Research International 2024年第8期31卷 1850-1860页

作者： Hui-bo Liu Liang-ping Xu Xi-duan Yang zhong-lin Dong Qiang zhong Guang-hui Li School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina

The inhomogeneous sinter properties in super-high bed sintering have been reported in our previous *** inves-tigate the reasons for the inhomogeneous phenomena,detailed sampling and analysis of mixed material bed and sintered bed in super-high bed sintering plant were *** results indicated that the higher porosity and thinner dendrite of silico-ferrite of calcium and aluminum in the upper layer as well as dense structure and higher secondary hematite content in the lower layer led to the heterogeneities of mechanical strength and reduction properties exceeding 20%and 10%,*** the bed top downward,the basicity of mixed material decreased from 2.13 to 1.68 because the average particle size increased from 2.65 to 4.56 *** and fuels gathered in finer particles(-3 mm)of mixed material,and the-3 mm particles of mixed material generated more liquid phase than+3 mm *** heat input of super-high sintering bed was inhomogeneous due to the heat accumulation effect and unreasonable fuel *** inhomo-geneous sintering heat condition in sintering bed resulted in the different quantities and properties of liquid *** inhomogeneous quantities and properties of liquid phase that were influenced by inhomogeneous distribution of chemical composition,particle size,and heat input led to inhomogeneous mineralizing *** mineralizing condition is the key for homogeneous super-high bed sintering.

关键词： Iron ore Super-high bed sintering Mineralization Material segregation Heat accumulation

Recent Advances in Nickel Catalyzed Carbonylative Reactions via the Insertion of Carbon Monoxide

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Chinese Journal of Chemistry 2024年第2期42卷 177-189页

作者： Xinzhou Chen Gang Chen zhong Lian Department of Dermatology State Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan UniversityChengduSichuan 610041China

Carbonyl compounds have attracted considerable attention due to their extensive applications in drug ***,they are important synthetic intermediates for the construction of carbon-carbon and carbon-heteroatom ***-metal-catalyzed carbonylation via the insertion of co is one of the most efficient and straightforward strategies to access carbonyl ***,most of the transition-metal-catalyzed carbonylative reactions require expensive and toxic noble-metal ***,there is a growing demand for the exploration of nickel-catalyzed carbonylative reactions via the insertion of CO due to the earth abundance and low cost of *** with the well-established palladium-catalyzed carbonylative reactions,nickel-catalyzed analogous transformations have been relatively *** is primarily because CO strongly binds to nickel,often resulting in catalyst *** recent years,some research groups have focused on using CO surrogates or NN_(2) pincer nickel catalyst to circumvent the formation of Ni(CO)_(4).Nickel-catalyzed carbonylation has been applied in the construction of carbonyl-containing compounds,such as ketones,carboxylic acids,thioesters,acyl chloride and carboxamides.

关键词： Carbonylation Nickel catalysis Carbon monoxide C1 chemistry Carbonyl-containing compounds