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One-pot synthesis of crystalline SnO_2 nanoparticles and their low-temperature ethanol sensing characteristics

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Science China(Physics,Mechanics & Astronomy) 2009年第10期52卷 1601-1605页

作者： CHEN YuJin1,2,3.ZHU ChunLing4,WANG LiJiao3.& WANG TaiHong2 1 School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China 2 micro-nano technologies research center,hunan university,changsha {3.China 3.College of Science,Harbin Engineering university,Harbin 150001,China 4 College of Material Science and Chemical Engineering,Harbin Engineering university,Harbin 150001,China School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China micro-nano technologies {3. center Hunan University Changsha 410082 China College of Science Harbin Engineering University Harbin 150001 China College of Material Science and Chemical Engineering Harbin Engineering University Harbin 150001 China

Crystalline SnO2 nanoparticles(NPs) with a diameter less than 6 nm are synthesized using potassium stannate trihydrate as the precursor in a basic *** synthesized NPs can detect ethanol at a ppm level even at 100℃.Furthermore,the NPs have good selectivity to *** excellent ethanol sensing performances are attributed to the small size effect according to the space-charge model.

关键词： SnO2 nanoparticles sensing characteristics

Quantitative detection of ING1 mRNA under different gene regulation based on molecular beacon

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Chinese Science Bulletin 2006年第17期51卷 2059-2064页

作者： LIU Bin1,2,3.4, WANG Kemin1,2,3.4, XIAO Zhiqiang5,6, WANG Wei1,3.4, TAN Weihong1,2,3.4, SUN Yi5,6, TANG Hongxing1,3.4 & YANG Xiaohai1,3.41. State Key Laboratory of Chemo/Biosensing and Chemometrics, Hu- nan university, changsha 410082. China 2. Life Science and Biotechnology Institute, {3., Chang- sha 410082. China 3. Chemistry and Chemical Engineer College, {3., changsha 410082. China 4. hunan Engineering research center for Bio-nanotechnology, {3., changsha 410082. China 5. Medical Experiment research center, Xiangya Hospital, Central South university, changsha 410008, China 6. Key Laboratory of Cancer Proteomics of Chinese Ministry of Health, changsha 410008, China State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha China Life Science and Biotechnology Institute Hunan University Changsha China Chemistry and Chemical Engineer College Hunan University Changsha China hunan Engineering research center for Bio-{3.technology Hunan University Changsha China Medical Experiment research center Xiangya Hospital Central South University Changsha China Key Laboratory of Cancer Proteomics of Chinese Ministry of Health Changsha China

The effects of drug treatment, gene transfection, and p53.RNA interference (RNAi) on level of ING1 mRNA in tumor cells were quantitatively detected with the help of ING1 molecular beacon (MB)/cRNA standard curve based on MB detection technology. Results showed that the level of ING1 mRNA could be upregulated by 5-FU treatment or ING1 transfection in low expression cell line of MCF-7 and be inhibited by silencing p53.with RNAi technology in normal expression cell line of CNE2. The level of ING1 varied from 7.7×10?16 to 53.4× 10?16 mol/μg total RNA of tumor cells. The results not only provided evidence for the regulation effects of gene expression but also were applied to investigat- ing the interaction of multigenes on signal transduc- tion pathway.

关键词： ING1 RT-PCR 定量分析分子信号 mRNA

Synthesis and magnetic properties of CdS/α-Fe_2O_3.hierarchical nanostructures

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Science China(Physics,Mechanics & Astronomy) 2009年第7期52卷 997-1002页

作者： CHEN YuJin1,2,3. SHI XiaoLing1, CAO MaoSheng1 & ZHU ChunLing4 1 School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China 2 micro-nano technologies research center, hunan university, changsha {3. China 3.College of Science, Harbin Engineering university, Harbin 150001, China 4 College of Material Science and Chemical Engineering, Harbin Engineering university, Harbin 150001, China 1. School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China 2. micro-nano technologies {3. center Hunan University Changsha 410082 China 3. College of Science Harbin Engineering University Harbin 150001 China 4. College of Material Science and Chemical Engineering Harbin Engineering University Harbin 150001 China

CdS/α-Fe2O3.hierarchical nanostructures, where the CdS nanorods grow irregularly on the side surface of α-Fe2O3.nanorods, were synthesized via a three-step process. The diameters and lengths of CdS nanorods can be tuned by changing the ethylenediamine (EDA) and Cd ion concentrations. The magnetic investigations by superconducting quantum interference device indicate that the hierarchical nanostructures have an Morin transition at lower temperature (23. K) than that of the single bulk α-Fe2O3.materials (263.K). Importantly, the hierarchical nanostructures exhibit weakly ferromagnetic characteristics at 3.0 K. A sharp peak assigned to the surface trap induced emission are observed in room temperature PL spectra. Combining with the optoelectronic properties of CdS, the CdS/ α-Fe2O3.hierarchical nanostructures may be used as multi-functional materials for optoelectronic and magnetic devices.

关键词： α-Fe2O3 CdS hierarchical nanostructures magnetic properties

中国政治经济学年度发展报告（2023.（下）

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政治经济学评论 2024年第3期 90+207-208页

作者： center for Studies of Contemporary Political Economy,research Institute for 21st-Century Marxism,Nankai university·university of Chinese Academy of Social Science center for Teaching and research on Capital,Renmin university of China National Institute of Socialist Political Economy with Chinese Characteristics,Renmin university of China 南开大学·中国社会科学院大学21世纪马克思主义研究院当代政治经济学研究中心中国人民大学《资本论》教学与研究中心中国人民大学全国中国特色社会主义政治经济学研究中心

编者按2023.，高质量发展扎实推进，新质生产力加快形成，我国经济总体回升向好，圆满实现发展主要预期目标。为针对性地破解经济恢复发展中的难题，聚焦推进中国式现代化进程中的重点、难点问题，中国政治经济学界开展系统深入研究，...

编者按2023.，高质量发展扎实推进，新质生产力加快形成，我国经济总体回升向好，圆满实现发展主要预期目标。为针对性地破解经济恢复发展中的难题，聚焦推进中国式现代化进程中的重点、难点问题，中国政治经济学界开展系统深入研究，取得系列代表性成果。为准确刻画学界研究进展和轨迹，推动中国经济学理论体系的构建和完善，本刊精选议题如期奉上《中国政治经济学年度发展报告（2023.》。自2010年起，本刊连续十四年发布《中国政治经济学年度发展报告》，“年度发展报告”专栏已成为本刊标志性特色栏目。2023.报告聚焦12个专题，分为（上）（下）两篇，其中专题1—6于报告（上）篇刊登，专题7—12由报告（下）篇刊登。2023.报告（下）选题如下：

关键词：

2023.Guideline for the management of hypertension in the elderly population in China

同方期刊数据库人大复印报刊资料评论

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Journal of Geriatric Cardiology 2024年第6期21卷 589-630页

作者： Hypertension Branch of Chinese Geriatrics Society,Beijing Hypertension Association,National Clinical research center of the Geriatric Diseases Qi HUA Li FAN Zeng-Wu WANG Jing LI 不详 Xuanwu Hospital Capital Medical UniversityBeijingChina Chinese PLA General Hospital BeijingChina Fuwai Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

Preamble Hypertension is one of the most common chronic diseases and the primary risk factor for stroke,myocardial infarction and even cardiovascular *** than half of the elderly population has high blood *** people are a unique group,and strategies for the prevention,diagnosis,evaluation,and treatment of hypertension in elderly individuals differ significantly from those in the general population.

关键词： hypertension prevention diagnosis

microstructure and formation mechanism of twins of laths of austenite with high nitrogen

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Science China(Technological Sciences) 2007年第6期50卷 755-764页

作者： WU CuiLan1,2 & LUO ChengPing2 1 center for High Resolution Electron microscopy, College of Materials Science and Engineering, hunan university, {3. 410082. China 2 College of Mechanical Engineering, South China university of Technology, Guangzhou 510641, China 1. center for High Resolution Electron microscopy College of Materials Science and Engineering Hunan University Changsha 410082 China 2. College of Mechanical Engineering South China University of Technology Guangzhou 510641 China

The microstructure of composite diffusion layer of the nitrided and chromized 0.2% carbon steel is investigated using TEM and EDS. It is found that laths of austenite with high nitrogen (γ N) precipitate from α-ferrite matrix in the deeper zone of the diffusion layer. These γ N laths are all twins, with their {111} twinning planes parallel to the lath axis, thus forming a characteristic "back-to-back" morphology. There are two types of γN lath. The first is a genuinely {111} twin, and γ N and α keep the accurate K-S relationship, and each γ N and α form a sharp and smooth γ N/α inter- face of {335}γN//{341}α, namely habit plane {335}fcc. The second is a pseudo-twin, with micro-twins {111} or faults formed within the two twin components. Localized lattice deformation (relaxation) seems to have occurred at the interfaces of the second type of γ N due to the formation of micro-twins or faults within the twin components. These micro-twins or faults make the orientation relationship (OR) between each of the γN and the α-matrix deviate from the accurate K-S OR, and the OR between two γ N twin components deviate from the genuine {111} twin relation- ship. In addition, the γ N/α interface of the second type of γ N is not as sharp or smooth as that of the first one.

关键词： austenite containing nitrogen, twins, steel 20, nitriding, composite chromizing

TEM STUDY OF C-B_4C-SiC COMPOSITES WITH SILICON ADDITIVE

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Acta Metallurgica Sinica(English Letters) 1995年第2期8卷 92-96页

作者： ZHAO Lihua WU Lijun HUANG Qizhong YANG Qiaoqin 1)(Material research and Test center,hunan university,{3.,China)2)(Powder Metallurgy research Institute,center-South university of Technology,{3.,China)3.(Laboratory of Atomic Imaging of Solids, Ins hunan Univ Changsha China

C-B4C-SiC composites with silicon additive obtained by the hot press sintering method are studied by means of transmission electron microscopy(TEM).When the specimens are heated to 1800℃,their structure does not *** the specimens are heated to 2000℃,carbon begins to graphitize. Moreover,two monoclinic phases are *** monoclinic phase named as the M phase belongs to C-center monoclinic lattice with a=0.90nm,b=0.59nm,c=0.54nm and β=119.3..The other monoclinic phase named as the Ml phase also belongs to C-center monoclinic lattice but with a=0.85nm,b=0.49nm,c=0.53.m and β=123.6°.

关键词： C-B_4C-SiC composite electron microscopy

Aspects of recent developments in analytical chemometrics

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Science China Chemistry 2006年第3期49卷 193-203页

作者： LIANG Yizeng1,2, WU Hailong1, SHEN Guoli1, JIANG Jianhui1, LIANG Sheng2 & YU Ruqin1 1. State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, hunan university, changsha 410082. China 2. {3. center of Modernization of Traditional Chinese Medicines, Central South university, changsha 410081, China 1. State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China 2. research center of Modernization of Traditional Chinese Medicines Central South University Changsha 410081 China

Some aspects of recent developments in analytical chemometrics are discussed, in par- ticular the developments viewed from the angle of the research efforts undertaken in authors’ labora- tories. The topics concerned include resolution of high-order chemical data, morphological theory and methodology for chemical signal processing, multivariate calibration and chemical pattern recognition for solving complex chemical problems, and resolution of two-way chemical data from hyphenated chromatographic instruments.

关键词： chemometrics, high-order chemical data, pattern recognition, multivariate calibration and resolution.

LOD score exclusion analyses for candidate disease susceptibility genes using case-parents design

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Progress in Natural Science:Materials International 2006年第1期16卷 30-38页

作者： DENG Hongwen1,2,3.and GAO Guimin2,4 (1.Laboratory of Molecular and Statistical Genetics, College of Life Sciences, hunan Normal university, changsha 410081, China 2.Osteoporosis {3. center, Creighton university Medical center, Omaha NE 6813., USA 3. Department of Biomedical Sciences, Creighton university, Omaha NE 6813., USA 4. Virginia Bioin format ics Institute and Department of Statistics, Virginia Polytechnic Institute and State university, Blacksburg VA 24061-03.5, USA) [a]Laboratory of Molecular and Statistical Genetics College of Life Sciences Human National University Changsha China [b]Osteoporosis research center Creighton University Medical Center Omaha NE USA [c]Department of Biomedical Sciences Creighton University Omaha NE USA [d]Virginia Bioinformatics Institute and Department of Statistics Virginia Polytechnic Institute and State University Blacksburg VA USA

The focus of almost all the association studies of candidate genes is to test for their importance. We recently developed a LOD score approach that can be used to test against the importance of candidate genes for complex diseases and quantitative traits in random samples. As a complementary method to regular association analyses, our LOD score approach is powerful but still affected by the population admixture, though it is more conservative. To control the confounding effect of population heterogeneity, we develop here a LOD score exclusion analysis using case-parents design, the basic design of the transmission disequilibrium test (TDT) approach that is immune to population admixture. In the analysis, specific genetic effects and inheritance models at candidate genes can be analyzed and if a LOD score is ≤ - 2. 0, the locus can be excluded from having an effect larger than that specified. Simulations show that this approach has reasonable power to exclude a candidate gene having small genetic effects if it is not a disease susceptibility locus (DSL) with sample size often employed in TDT studies. Similar to association analyses with the TDT in nuclear families, our exclusion analyses are generally not affected by population admixture. The exclusion analyses may be implemented to rule out candidate genes with no or minor genetic effects as supplemental analyses for the TDT. The utility of the approach is illustrated with an application to test the importance of vitamin D receptor (VDR) gene underlying the differential risk to osteoporosis.

关键词： association studies candidate genes case-parents design disease susceptibility locus exclusion mapping LOD score.