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青蒿素原料生产与资源再生全球战略研究

科学通报 2017年第18期62卷 1982-1996页

作者：陈士林向丽李琳邬兰黄林芳张栋孙鹏中国中医科学院中药研究所北京市中药鉴定与安全性检测评估重点实验室北京100700 中国医学科学院北京协和医学院药用植物研究所北京100193

青蒿素被世界卫生组织推选为抗疟一线药物,中药青蒿原植物黄花蒿(Artemisia annua L.)是青蒿素的主要来源.然而,全球范围内黄花蒿青蒿素含量差异较大,大部分地区野生资源无工业提取价值.本文从全球视角对黄花蒿分布与产地适宜性、引种... 详细信息

青蒿素被世界卫生组织推选为抗疟一线药物,中药青蒿原植物黄花蒿(Artemisia annua L.)是青蒿素的主要来源.然而,全球范围内黄花蒿青蒿素含量差异较大,大部分地区野生资源无工业提取价值.本文从全球视角对黄花蒿分布与产地适宜性、引种栽培等青蒿素资源再生进行了分析与阐述,并对原料提取工艺、生物合成和化学合成进行综合分析.通过研究及分析发现,高青蒿素含量黄花蒿生态适宜区主要在中国秦岭-淮河分界线以南,面积1.54×10~6 km^2.占全球分布的77.08%.巴西和美国也有少量分布,面积分别为1.49×10~6 km^2.7.43%)和1.30×10~6 km^2.6.47%).越南和日本有零星分布.优质黄花蒿生态次适宜区包括亚洲东南部、欧洲西部、北美洲南部与南美洲中部.通过黄花蒿新品种培育和规范化栽培可显著提高青蒿素含量.青蒿素资源再生与原料生产为"一带一路"走出去的全球中药资源国家战略实施奠定基础.

关键词：青蒿素黄花蒿资源原料全球战略产地适宜性

紫外可见分光光度法测定里松温泉水中硒的含量

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现代化工 2018年第4期38卷 233-235页

作者：陈秋娟谢微苏辉兰黄志强贺州学院材料与环境工程学院广西贺州542899 贺州学院食品与生物工程学院广西贺州542899 贺州学院食品科学与工程技术研究院广西贺州542899

为了测定温泉水中硒的质量浓度,以邻苯二胺为显色剂,采用紫外可见分光光度法测定里松温泉源头水中硒的质量浓度。实验结果表明,体系测定波长为333 nm,硒质量浓度在0.05~0.40μg/m L范围内具有良好的线性关系,其线性方程为y=1.598x+0.099... 详细信息

为了测定温泉水中硒的质量浓度,以邻苯二胺为显色剂,采用紫外可见分光光度法测定里松温泉源头水中硒的质量浓度。实验结果表明,体系测定波长为333 nm,硒质量浓度在0.05~0.40μg/m L范围内具有良好的线性关系,其线性方程为y=1.598x+0.099 5,相关系数为0.999 5,回收率为98.5%~101.6%,体系在2.h内稳定。该方法操作简便、准确率高,可用于温泉水中硒质量浓度的测定。

关键词：邻苯二胺紫外可见分光光度法里松温泉水硒

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TORCH感染与孕妇妊娠结局的相关性研究

中国优生与遗传杂志 2018年第5期26卷 65-66,64页

作者：黎科周海兰天津大学医院妇产科天津300072 天津金域医学检验中心免疫室天津300384

目的通过检测孕妇TORCH感染率,探讨分析孕妇TORCH感染与流产、死胎、早产、宫内发育迟缓和先天畸形等不良妊娠结局的相关性。方法采用酶联免疫吸附试验(ELISA)检测方法,对我院2.17例孕妇进行TORCH检测分析,每次均做质控。对其中2.3例不... 详细信息

目的通过检测孕妇TORCH感染率,探讨分析孕妇TORCH感染与流产、死胎、早产、宫内发育迟缓和先天畸形等不良妊娠结局的相关性。方法采用酶联免疫吸附试验(ELISA)检测方法,对我院2.17例孕妇进行TORCH检测分析,每次均做质控。对其中2.3例不良妊娠妇女与2.14例正常妊娠妇女作对照研究。结果 2.17例孕妇TOX-Ig M,RV-Ig M,CMVIg M,HSV-II-Ig M,HSV-I-Ig M阳性率分别为0.76%,1.76%,0.80%,1.72.,4.81%;TOX-Ig G,RV-Ig G,CMV-Ig G,HSV-IIIg G,HSV-I-Ig G阳性率分别为4.85%,92.2.%,90.83%,8.75%,86.2.%。不良妊娠妇女TOX-Ig M,RV-Ig M,CMV-Ig M,HSVII-Ig M,HSV-I-Ig M阳性率分别为1.97%,5.42.,2.46%,4.43%,8.37%,TORCH-Ig M总阳性率为2..66%;正常妊娠孕妇TOXIg M,RV-Ig M,CMV-Ig M,HSV-II-Ig M,HSV-I-Ig M阳性率分别为0.50%,1.2.%,0.58%,1.2.%,3.94%,TORCH-Ig M总阳性率为7.54%,不良妊娠妇女的阳性率明显高于正常妊娠孕妇(χ~2.53.83,P<0.001),差异有统计学意义。结论 TORCH感染是导致不良妊娠结局的重要因素之一,应加强对孕前及孕早期妇女TORCH感染的筛查,对优生优育有着重要的意义。

关键词：孕妇 TORCH感染不良妊娠结局

CONVERGENCE OF MODIFIED TRUNCATED EULER-MARUYAMA METHOD FOR STOCHASTIC DIFFERENTIAL EQUATIONS WITH HOLDER DIFFUSION COEFFICIENTS

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Journal of Computational Mathematics 2024年第4期42卷 1109-1123页

作者： Guangqiang lan Yu Jiang College of Mathematics and Physics Beijing University of Chemical TechnologyBeijing 100029China

Convergence of modified truncated Euler-Maruyama(MTEM)method for stochastic differential equations(SDEs)with(1/2.α)-Holder continuous diffusion coefficients are investigated in this *** prove that the MTEM method for... 详细信息

关键词： Stochastic differential equations Modified truncated Euler-Maruyama method Strong convergence One-sided Lipschitz Holder continuous

A direct electrochemical biosensor for rapid glucose detection based on nitrogen-doped carbon nanocages

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Rare Metals 2024年第5期43卷 2184-2192页

作者： lan-lan Li Yu Zhao Li-Jia Pan Jian-Bin Xu Yi Shi College of Mechanical and Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China School of Electronic Science and Engineering Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210093China Department of Electronic Engineering The Chinese University of HongKongHongkong 999077China

Given the increasing number of diabetic patients,rapid and accurate detection of glucose in body fluids is *** study developed a direct electrochemical biosensor for glucose based on nitrogen-doped carbon nanocages(NCNCs).NCNCs possess a large specific surface area of 1395 m^(2.·g^(-1),a high N atomic content of 9.37%and good biocompatibility,which is favorable for enzyme loading and electron *** surface average concentration of electroactive glucose oxidase on NCNCs was 2.82.10^(-10)mol·cm^(-2..The NCNC-based direct electrochemical biosensor exhibited a high sensitivity of 13.7μA·(mmol·L^(-1))^(-1)·cm^(-2.,rapid response time of 5 s and an impressive electron-transferrate constant(ks)of 1.87 s^(-1).Furthermore,we investigated an NCNC-based direct electron transfer(DET)biosensor for sweat glucose detection,which demonstrated tremendous promise for non-invasive wearable diabetes diagnosis.

关键词： Direct electron transfer(DET) Nitrogen-doped carbon nanocages(NCNCs) Glucose oxidase Biosensor

A Scalable Pillar Layered Metal-Organic Framework for Natural Gas Purification

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Chemical Research in Chinese Universities 2024年第4期40卷 675-681页

作者： LU Nan lan lan GAO Qiang LI Na BU Xian-He School of Materials Science and Engineering Nankai UniversityTianjin300350P.R.China State Key Laboratory of Elemento-Organic Chemistry College of ChemistryNankai UniversityTianjin300071P.R.China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang212003P.R.China

One-step harvest of high-purity methane(CH_(4))from ternary propane/ethane/methane(C_(3)H_(8)/C_(2.H_(6)/CH_(4))mixtures remains a desirable yet challenging goal for natural gas ***,adsorbents either suffer from high capacity and selectivity,or are caught in a dilemma of scalable ***,we demonstrate a scalable pillar layered metal-organic framework Ni-MOF for highly efficient one-step CH_(4)***-MOF exhibits high C_(2.H_(6)and C_(3)H_(8)uptakes of 83.3 and 86.1 cm^(3)/g at 2.8 K and 100 kPa and remarkable C_(2.H_(6)/CH_(4)(50/50,volume ratio,2..5)and C_(3)H_(8)/CH_(4)(50/50,volume ratio,2.2.0)***,high C_(2.H_(6)(42.2.cm^(3)/g at 10 kPa)and C_(3)H_(8)(64.7 cm^(3)/g at 5 kPa)capacities in the low-pressure region at 2.8 K were realized on Ni-MOF,suggesting the strong affinities of Ni-MOF towards C_(2.H_(6)and C_(3)H_(8).Furthermore,the dynamic breakthrough experiments revealed that purifying CH_(4)from natural gas in one-step can be achieved in Ni-MOF with high-purity(>99.8%)and productivity(346.0 cm^(3)/g).Most significantly,the production of Ni-MOF can be scalably synthesized at room temperature,rendering it promising potential for industrial *** combined advantages of exceptional separation performance,scalability,and cycle stability of Ni-MOF pave the way for one-step CH_(4)purification from natural gas.

关键词： Metal-organic framework Adsorption and separation Natural gas purification Scale-up synthesis

Editorial:special topic on advanced energy catalytic materials

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Science China Materials 2024年第6期67卷 1681-1683页

作者： Shaojun Guo Yaqian lan School of Materials Science and Engineering Peking UniversityBeijing 100871China School of Chemistry South China Normal UniversityGuangzhou 510630China

Aiming to lowering the society’s dependence on fossil fuels,energy catalysis stands at the forefront of technological advancement,which promises to revolutionize the way we harness,convert,and utilize renewable *** current special topic of our journal,titled"Advanced Energy Catalytic Materials",aims to highlight the latest innovations,challenges,and opportunities in this exciting field.

关键词： field utilize catalysis

Tunable Phase Structure of Side-chain Liquid Crystalline Polymers Enabled by Molecular Engineering of Dual Mesogenic Cores

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Chinese Journal of Polymer Science 2024年第10期42卷 1459-1469,I0009页

作者： Wen-Huan Yao lan-Sheng Liu Jie Zhao Yan-Xia Wang An-Zhi Ma Zheng-Rui Ma lan-Ying Zhang Ruo-Chen lan College of Chemistry and Chemical Engineering Hunan UniversityChangsha410082China Key Laboratory of Eco-Functional Polymer Materials of the Ministry of Education Key Laboratory of Eco-Environmental Polymer Materials of Gansu ProvinceCollege of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou730070China Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing100871China Institute of Advanced Materials&Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang330022China

A series of novel side-chain liquid crystalline(SCLC)copolymers were synthesized by attaching two distinct mesogenic units,namely a chiral cholesteryl-based monomer(M1)and an achiral biphenyl-based monomer(M2.,to a poly(3-mercaptopropylmethylsiloxane)(PMMS)backbone via thiol-ene click *** influence of side chain composition on the self-assembly behavior and phase structures of these SCLC copolymers was systematically investigated using different *** indicate that three distinct liquid crystalline phases and four unique molecular configurations were identified within the polymer series,with the emergence of the liquid crystalline phase being a synergistic outcome of the two distinct side *** study underscores the critical influence of side chain dimensions,rigidity,and spatial volume on the self-assembly structures and phase characteristics of liquid crystalline polymers,providing valuable insights for the rational design and development of advanced functional materials with tailored properties.

关键词： Liquid crystalline copolymers Self-assembly Phase structure Chiral molar ratio

Perspective on new cell-free DNA technologies for early cancer detection

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Cancer Biology & Medicine 2024年第2期21卷 139-143页

作者： Jie Li Xun lan Department of Basic Medical Sciences School of MedicineTsinghua UniversityBeijing 100084China MOE Key Laboratory of Bioinformatics Tsinghua UniversityBeijing 100084China Tsinghua-Peking Joint Center for Life Sciences Tsinghua UniversityBeijing 100084China

High cancer heterogeneity and aggressiveness are major factors contributing to the poor prognosis of patients with advanced cancer~(1-5).Early detection of cancer can significantly improve the prognosis of patients with early-stage cancer after standard *** traditional cancer detection technologies,such as endoscopy for gastrointestinal cancer,mammography for breast cancer。

关键词： prognosis cancer patients