一种简单快速检测乳品中三聚氰胺的电化学方法
作者：
罗永丰;吴玲;孔龙;宋天铭;何婧琳;...
期刊：
化学传感器 ,2013年(2):38-44 ISSN：1008-2298
作者机构：
长沙理工大学化学与生物工程学院，电力与交通材料保护湖南省重点实验室，湖南长沙410004
关键词：
金银核壳;三聚氰胺;电化学传感器;牛奶
摘要：
该文报道了一种基于金银核壳纳米粒子(Au@Ag CS NPs)检测乳品中三聚氰胺的简单、快速电化学方法。通过层层自组装技术将二硫苏糖醇（DTT）、金银核壳纳米粒子(Au@Ag CS NPs)、L-半胱氨酸（L-Cys）键合在金表面，形成Au/DTT/Au@Ag CS NPs/L-Cys修饰传感膜。通过电化学阻抗和循环伏安行为探讨了该修饰电极检测三聚氰胺的作用机理，发现其阻抗值与三聚氰胺浓度对数在1.0×10-7~1.0×10-2 mol/L范围内呈良好线性关系，线性拟合方程为y=1049.7+56.75x，线性相关系数为0.9976，检测限为6.553×10-8 mol/L。该修饰电极选择性和重现性好，用于牛奶样品中三聚氰胺的检测，回收率为98.2%~106.0%，有实际应用价值。
语种：
中文
展开
An Aptamer-based Electrochemical Sensor Using Enzyme Cascade Amplification Approach
作者：
Jun-Xia Wang;Jing-Lin He;Li-Hong Zeng;Shuang-Li Zhu;Ping Wu;...
作者机构：
[Jun-Xia Wang; Jing-Lin He; Li-Hong Zeng; Shuang-Li Zhu; Ping Wu; Zhong Cao] Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation,School of Chemistry and Biological Engineering,Changsha University of Science and Technology,Changsha 410004,P.R.China
会议名称：
International Conference on Nanoscience & Technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)
会议时间：
2013-9-5
会议地点：
北京
会议主办单位：
中国力学学会;国家纳米科学中心
会议论文集名称：
International Conference on Nanoscience & Technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)论文集
摘要：
With a combinatorial method called in vitro selection or systematic evolution of ligands by exponential enrichment (SELEX), short synthetic DNA sequences known as aptamers have been selected as ligands to bind analytes.In the field of analytical chemistry, aptamer can be used as molecular recognition element in biosensor design.
语种：
英文
展开
Improved dehydrogenation/rehydrogenation performance of LiBH4 by doping mesoporous Fe2O3 or/and TiF3
作者：
Zhang, Hui;Cao, Zhong* ;Sun, Li-Xian;Sun, Yu-Jia;Xu, Fen;...
期刊：
Journal of Thermal Analysis and Calorimetry ,2013年112(3):1407-1414 ISSN：1388-6150
通讯作者：
Cao, Zhong
作者机构：
[Zhang, Hui; Cao, Zhong; Liu, Hui] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.;[Zhang, Hui; Huang, Zi-Qiang; Zhang, Jian; Jiang, Xia; Sun, Li-Xian; Liu, Hui; Wang, Shuang; Jiao, Cheng-Li; Li, Zhi-Bao; Liu, Shuang] Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China.;[Zhou, Huai-Ying; Sun, Li-Xian] Guilin Univ Elect Technol, Fac Mat Sci & Engn, Guilin 541004, Peoples R China.;[Sun, Yu-Jia] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.;[Xu, Fen] Guilin Univ Elect Technol, Dept Mat Sci & Engn, Guilin 541004, Peoples R China.
通讯机构：
[Cao, Zhong] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
关键词：
LiBH4;Mesoporous iron oxide;Trifluoride antimony;Co-doped system;Hydrogen storage
摘要：
The LiBH<inf>4</inf>+ mesoporous Fe<inf>2</inf>O<inf>3</inf>(defined as M-Fe<inf>2</inf>O<inf>3</inf>) mono-doped and LiBH<inf>4</inf>+ M-Fe<inf>2</inf>O<inf>3</inf>+ TiF<inf>3</inf>co-doped hybrid materials were prepared by ball milling process. A variety of characterization methods, such as thermogravimetric, differential scanning calorimetry, X-ray diffraction, and pressure-composition-temperature instrument, were used for examinations of the two materials' performances of storage/release of hydrogen, catalytic activity, kinetics, and thermodynamics. All the results showed that the M-Fe<inf>2</inf>O<inf>3</inf>prepared in laboratory exhibited a good catalytic effect. Compared with the performance of M-Fe<inf>2</inf>O<inf>3</inf>mono-doped system, M-Fe<inf>2</inf>O<inf>3</inf>and TiF<inf>3</inf>co-doped mode exhibits a better performance using the same additive content. Thus, the M-Fe<inf>2</inf>O<inf>3</inf>and TiF<inf>3</inf>co-doped mode possesses a collaborative catalytic utility with the LiBH<inf>4</inf>hydrogen performance improved, showing a promising application. ©2012 Akade´miai Kiado´, Budapest, Hungary.<br/>
语种：
英文
展开
Ultra-sensitive and Rapid Determination of Mercury Ions Based on 11-Mercaptoundecanoic Acid Assembled Nano Gold Plate Electrode
作者：
Ting-Ting Cao;Shu Long;Jing-Ling Hu;Zhong-Liang Xiao;Jing-Lin He;...
作者机构：
[Ting-Ting Cao; Shu Long; Jing-Ling Hu; Zhong-Liang Xiao; Jing-Lin He; Zhong Cao] Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation,School of Chemistry and Biological Engineering,Changsha University of Science and Technology,Changsha 410004,P.R.China
会议名称：
International Conference on Nanoscience & Technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)
会议时间：
2013-9-5
会议地点：
北京
会议主办单位：
中国力学学会;国家纳米科学中心
会议论文集名称：
International Conference on Nanoscience & Technology,China 2013(ChinaNANO 2013)(中国国际纳米科学和技术大会)论文集
关键词：
Mercury ions;Self-assembled monolayer;11-Mercaptoundecanoic acid;Nano gold plate electrode
摘要：
Among heavy metal ions, mercury is notable for being a toxic element of great environmental concern because it is widespread in the lithosphere and the hydrosphere. The high toxicity of mercury is wel
语种：
英文
展开
Determination of trace amount of Cu2+ with a multi-responsive colorimetric and reversible chemosensor
作者：
Mi, Yong-Sheng;Cao, Zhong* ;Chen, Ya-Ting;Xie, Qiu-Fen;Xu, Ying-Ying;...
期刊：
ANALYST ,2013年138(18):5274-5280 ISSN：0003-2654
通讯作者：
Cao, Zhong
作者机构：
[Xiang, Jian-Nan; Chen, Ya-Ting; Xie, Qiu-Fen; Mi, Yong-Sheng; Xu, Ying-Ying] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.;[Luo, Yong-Feng; Mi, Yong-Sheng; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.;[Shi, Jian-Jian] Indiana Univ, Riley Heart Res Ctr, Wells Ctr Pediat Res, Dept Pediat,Sch Med, Indianapolis, IN 46202 USA.
通讯机构：
[Cao, Zhong] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Determination;multi-responsive colorimetric;reversible chemosensor
摘要：
A multi-responsive sensor 1 was constructed by combining a ferrocene unit and a rhodamine block via a carbohydrazone bond. The sensor showed high selectivity toward Cu 2+ over other common metal ions in a wide pH range with excellent reversibility and rapid response. The obvious color change from colorless to pink upon the addition of Cu 2+ could make it a suitable 'naked-eye' indicator for Cu 2+ . The detection limit (LOD) obtained was down to 2.0 nM and the association constant (K a ) was evaluated as 4.65 × 10 7 M -1 . The accuracy for detecting Cu 2+ in environmental river water was compared favorably with the traditional atomic absorption spectroscopy method (AAS). Finally, we proposed a reversible ring-opening mechanism (Off-On) of the rhodamine spirolactam induced by Cu 2+ binding and a 2:1 stoichiometric structure between 1 and Cu 2+ . © 2013 The Royal Society of Chemistry.
语种：
英文
展开
An electrochemical immunosensor based on gold nanoparticle tags for picomolar detection of c-Myc oncoprotein
作者：
He, Jing-Lin* ;Tian, Yan-Fei;Cao, Zhong;Zou, Wei;Sun, Xin
期刊：
Sensors and Actuators B-Chemical ,2013年181:835-841 ISSN：0925-4005
通讯作者：
He, Jing-Lin
作者机构：
[Tian, Yan-Fei; He, Jing-Lin; Sun, Xin; Zou, Wei; Cao, Zhong] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[He, Jing-Lin] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
关键词：
c-Myc oncoprotein;Immunosensor;Gold nanoparticle tags;Signal enhancement;Impedance
摘要：
Here a new electrochemical immunoassay platform has been developed for the trace amounts of myelocytomatosis (c-Myc) oncoprotein detection to solve the urgent need for improved early diagnostic tools of cancer. To our knowledge, this is the first electrochemical immunosensor for c-Myc oncoprotein determination by employing gold nanoparticles as labels in a signal enhancement strategy. It is based on a sandwich immunoassay where the target c-Myc oncoprotein (C<inf>Ag</inf>) is captured by the primary c-Myc antibody (C <inf>Ab</inf>) modified on gold substrate, followed by adding another C <inf>Ab</inf> conjugated to gold nanoparticle tags. The proposed sensor shows a linear range between 4.3 pmol L<sup>-1</sup> and 43 nmol L<sup>-1</sup>, with an estimated detection limit of 1.5 pmol L<sup>-1</sup>. The recovery was achieved between 96.2% and 109% in 1% serum samples. This sensitive immunosensor holds great promise for the early diagnostic application of cancer at a curable stage. ©2013 Elsevier B.V.
语种：
英文
展开
Molecule counting with alkanethiol and DNA immobilized on gold microplates for extended gate FET
作者：
Cao, Zhong* ;Xiao, Zhong-Liang;Zhang, Ling;Luo, Dong-Mei;Kamahori, Masao;...
期刊：
Materials Science and Engineering C: Materials for Biological Applications ,2013年33(3):1481-1490 ISSN：0928-4931
通讯作者：
Cao, Zhong
作者机构：
[Xiao, Zhong-Liang; Zhang, Ling; Cao, Zhong] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.;[Luo, Dong-Mei] Foshan Univ, Environm & Civil Engn Sch, Foshan 528000, Peoples R China.;[Kamahori, Masao; Shimoda, Maki] Hitachi Ltd, Cent Res Lab, Kokubunji, Tokyo 1858601, Japan.;[Cao, Zhong] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Cao, Zhong] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Molecule counting;Gold microplate;Alkanethiol;DNA probe;Fast cyclic voltammetry;Extended gate FET
摘要：
Several molecule counting methods based on electrochemical characterization of alkanethiol and thiolated single-stranded oligonucleotide (HS-ssDNA) immobilized on gold microplates, which were used as extended gates of field effect transistors (FETs), have been investigated in this paper. The surface density of alkanethiol and DNA monolayers on gold microplates were quantitatively evaluated from the reductive desorption charge by using cyclic voltammetry (CV) and fast CV (FCV) methods in strong alkali solution. Typically, the surface density of 6-hydroxy-1-hexanethiol (6-HHT) was evaluated to be 4.639 molecules/nm<sup>2</sup>, and the 28 base-pair dsDNA about 1.226-4.849 molecules/100 nm<sup>2</sup> on Au microplates after post-treatment with 6-HHT. The behaviors on surface potential and capacitance of different aminoalkanethiols on Au microplates were measured in 0.1 mol/L Na <inf>2</inf>SO<inf>4</inf> and 10 mmol/L Tris-HCl (pH = 7.4) solutions, indicating that the surface potential increases and the double-layer capacitance decreases with the length of carbon chain increased for the thiol monolayers, which obey a physics relationship for a capacitor. Comparably, a simple sensing method based on the electronic signals of biochemical reaction events on DNA immobilization and hybridization at the Au surface of the extended gate FET (EGFET) was developed, with which the surface density of the hybridized dsDNA on the gold surface of the EGFET was evaluated to be 1.36 molecules per 100 nm<sup>2</sup>, showing that the EGFET is a promising sensing biochip for DNA molecule counting. ©2012 Elsevier B.V. All Rights Reserved.
语种：
英文
展开
Fe_2O_3与TiF_3添加剂对LiBH_4-MgH_2复合氢化物体系的协同催化作用
作者：
Zhang Hui;Zhou Yi-Xi;Sun Li-Xian* ;Cao Zhong;Xu Fen;...
期刊：
高等学校化学学报 ,2012年33(4):781-785 ISSN：0251-0790
通讯作者：
Sun Li-Xian
作者机构：
[Liu Shuang; Zhang Jian; Li Fen; Zhou Yi-Xi; Wang Shuang; Li Zhi-Bao; Liu Shu-Sheng; Sun Li-Xian; Si Xiao-Liang; Song Li-Fang; Jiao Cheng-Li; Zhang Hui] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China.;[Cao Zhong; Zhou Yi-Xi; Zhang Hui] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.;[Xu Fen] Liaoning Normal Univ, Chem & Chem Engn Sch, Dalian 116029, Peoples R China.
通讯机构：
[Sun Li-Xian] C;Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China.
关键词：
协同催化
摘要：
通过球磨方法制备出2LiBH_4-MgH_2,2LiBH_4-MgH_2-10%Fe_2O_3,2LiBH_4-MgH_2-10%TiF_3,2LiBH_4-MgH_2-5%Fe_2O_3-5%TiF_3和2LiBH_4-MgH_2-10%Fe_2O_3-10%TiF_35个复合氢化物体系,用热重(TG)、差示扫描量热(DSC)、X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)和压力-组成-温度仪(PCT)等对所制备体系进行表征。结果表明,Fe_2O_3和TiF_3的掺杂均能够有效地改善2LiBH_4-MgH_2复合体系的放氢性能,尤其是两者共掺杂的2LiBH_4-MgH_2-10%Fe_2O_3-10%TiF_3体系,初始放氢温度为110℃,总放氢量达到约9。6%。对2LiBH_4-MgH_2-5%Fe_2O_3-5%TiF_3体系的PCT表征结果表明,在400℃时,10 min内放氢量达到了8。6%,放氢热力学和放氢动力学均优于单一相的掺杂,体现了两相掺杂的协同催化作用。
语种：
中文
展开
Synthesis and Analytical Application of Fluorescent Iron Ions(III) Probe Based on 2-( 4-aminophenyl) benzo[ d ]thiazole and 2-Picolylamine Derivatives
作者：
Yi Wei-Guo* ;Cao Zhong;Yan Dong;Cao Ting-Ting;Xue Lin
期刊：
分析化学 ,2012年40(8):1241-1246 ISSN：0253-3820
通讯作者：
Yi Wei-Guo
作者机构：
[Yan Dong; Yi Wei-Guo] Hunan Chem Ind Vocat Technol Inst, Zhuzhou 412004, Peoples R China.;[Xue Lin; Cao Zhong; Cao Ting-Ting; Yi Wei-Guo] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Yi Wei-Guo] H;Hunan Chem Ind Vocat Technol Inst, Zhuzhou 412004, Peoples R China.
关键词：
荧光分子探针;2-（4-氨基苯基）苯并噻唑;2-吡啶甲基胺衍生物;铁离子
摘要：
设计合成了两种新型的以2-苯基苯并噻唑为荧光团、N-(2-吡啶甲基)胺为识别基团的铁离子荧光分子探针2-(4-N-2-吡啶甲胺基)苯基-1,3-苯并噻唑(A1)和2-(4-N,N双2-吡啶甲胺基)苯基-1,3-苯并噻唑(A2),化合物结构用UV,IR,1HNMR和13CNMR进行了表征,并考察了探针的荧光特性.结果表明荧光分子探针A2在CH3 CH2OH/H-12O(1∶1,V/V)溶液中,能从常见的金属离子中以95％的荧光淬灭率选择性地识别铁离子,对Fe3+线性响应范围在0.15～1.3 μ mol/L之间,且检出限达10 nmol/L.
语种：
中文
展开
Domino Cross Dehydrogenative Coupling of 2-Aryl Acetals with Ketones Using DDQ as Oxidant and Reactant Precursor
作者：
Li Jiangsheng* ;Cai Feifei;Li Zhiwei;Xue Yuan;Cheng Chao;...
期刊：
中国化学 ,2012年30(8):1699-1701 ISSN：1001-604X
通讯作者：
Li Jiangsheng
作者机构：
[Li Zhiwei; Cao Zhong; Cheng Chao; Xue Yuan; Cai Feifei; Liu Weidong; Li Jiangsheng] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Li Jiangsheng] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
acetals;C—H activation, DDQ;cross dehydrogenative coupling;ketones
摘要：
A novel domino cross dehydrogenative coupling of 2-aryl acetals with unmodified ketones has been developed, using DDQ as both the oxidant and reactant precursor.
语种：
英文
展开
基于纳米铂/氧化锌/多壁碳纳米管的亚硝酸根修饰电极
作者：
张慢乐;曹忠;何婧琳;李瑞花;朱龙冠;...
作者机构：
[张慢乐; 曹忠; 何婧琳; 李瑞花; 朱龙冠; 郑云飞; 张玲] 长沙理工大学,化学与生物工程学院,电力与交通材料保护湖南省重点实验室,长沙 410004
会议名称：
中国化学会第十一届全国分析化学年会
会议时间：
2012-10-26
会议地点：
青岛
会议主办单位：
中国化学会
会议论文集名称：
中国化学会第十一届全国分析化学年会论文集
语种：
中文
展开
新型拓扑指数和神经网络研究咪唑啉衍生物的缓蚀性能
作者：
戴益民;刘又年;朱志平;李浔;曹忠;...
期刊：
石油学报(石油加工) ,2012年28(1):115-121 ISSN：1001-8719
通讯作者：
Dai, Y.(yimindai@163.com)
作者机构：
[戴益民; 刘又年] School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;[戴益民; 李浔; 曹忠; 朱志平; 杨道武] Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha 410004, China
通讯机构：
School of Chemistry and Chemical Engineering, Central South University, China
关键词：
电性连接性指数;咪唑啉衍生物;缓蚀剂;缓蚀效率(CIE);人工神经网络
摘要：
基于分子图论提出了一种用于表征咪唑啉衍生物分子局部化学微环境及原子杂化状态的新颖结构描述子,即电性连接性指数0Kv、1 Kv和咪唑啉环非氢原子平衡总电荷分数MCI,用于研究15种咪唑啉类缓蚀剂抗CO_2、H_2S腐蚀性能的定量构效关系。结果表明,模型计算值、留一法交互检验预测值的复相关系数分别为0.9764、0.9546,所建模型具有良好的稳定性和外部预测能力;同多元回归方法比较,运用人工神经网络法的复相关系数为0.9848,结果更精确;增加咪唑啉环上取代基长度、减小分子的支化度和降低咪唑环非氢原子平衡总电荷分数能显著提高咪唑啉缓蚀剂的缓蚀效率。
语种：
中文
展开
Detection of double stranded DNA and its damage by liquiritigenin with copper (II) on multi-walled carbon nanotubes
作者：
Long, Shu;Tian, Yan-Fei;Cao, Zhong* ;He, Jing-Lin;Luo, Dong-Mei
期刊：
Sensors and Actuators B-Chemical ,2012年166-167:223-230 ISSN：0925-4005
通讯作者：
Cao, Zhong
作者机构：
[Tian, Yan-Fei; He, Jing-Lin; Cao, Zhong; Long, Shu] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.;[Long, Shu] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.;[Luo, Dong-Mei] Foshan Univ, Environm & Civil Engn Sch, Foshan 528000, Peoples R China.
通讯机构：
[Cao, Zhong] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
DNA damage;Liquiritigenin;Multi-walled carbon nanotubes;Piezoelectric quartz crystal impedance analysis;Potentiometric stripping analysis
摘要：
The adsorption and electro-oxidation of double stranded (ds) DNA on multi-walled carbon nanotubes (MWNTs), which was directly grown on graphite electrode, was investigated through potentiometric stripping analysis (PSA), and the influence factors, such as accumulation time, immersion time and DNA concentration, were examined in detail. By using the MWNTs modified electrode, liquiritigenin (4′,7-dihydroxyflavone), which was synthesized in medium strong acid circumstance, was firstly found to cause dsDNA damage in the presence of Cu(II) by observing a new peak at 0.84 V and an increase at 1.06 V in the PSA spectrum when liquiritigenin was introduced into the dsDNA and Cu(II) solution. Liquiritigenin exhibited two conflicting effects, i.e., pro-oxidation and anti-oxidation at its different concentrations in the damage system. Biquinoline and catalase were found to inhibit the dsDNA damage, which showed that Cu(I) and H2O2 participated in the damage process. Piezoelectric quartz crystal impedance (PQCI) analysis was also used to further validate the DNA damage, and the frequency shift was found to be mainly due to the change on density–viscosity of the tested solution which was caused by the degradation of the DNA macromolecules. A possible mechanism of oxidative DNA damage induce by liquiritigenin in the presence of Cu(II) on multi-walled carbon nanotubes was proposed.
语种：
英文
展开
基于金纳米-双抗体夹心传感膜的信号增强方法检测c-myc蛋白
作者：
田雁飞;曹忠;何婧琳;邹巍;孙鑫;...
作者机构：
[田雁飞; 曹忠; 何婧琳; 邹巍; 孙鑫; 姚玉强] 长沙理工大学,化学与生物工程学院,电力与交通材料保护湖南省重点实验室,长沙 410004
会议名称：
中国化学会第十一届全国分析化学年会
会议时间：
2012-10-26
会议地点：
青岛
会议主办单位：
中国化学会
会议论文集名称：
中国化学会第十一届全国分析化学年会论文集
语种：
中文
展开
问题学习法在《仪器分析》课程教学中的应用研究——问题构建探索
作者：
陈平;张玲;李丹;谭淑珍;曹忠;...
期刊：
教育教学论坛 ,2012年(11):146-147 ISSN：1674-9324
作者机构：
长沙理工大学化学与生物工程学院,湖南长沙,410004
关键词：
仪器分析;问题学习法;问题构建
摘要：
根据《仪器分析》课程特点,以兴趣引导性、问题导向性、专业相关性、问题开放性为问题构建的基本原则,以各种仪器分析方法为学习单元,进行了单元问题构建的探索研究。
语种：
中文
展开
A simple gold plate electrode modified with Gd-doped TiO2 nanoparticles used for determination of trace nitrite in cured food
作者：
Zhang, M. -L.;Cao, Z.* ;He, J. -L.;Xue, L.;Zhou, Y.;...
期刊：
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT ,2012年29(12):1938-1946 ISSN：1944-0049
通讯作者：
Cao, Z.
作者机构：
[Cao, Z.; Xue, L.; Zhang, M. -L.; He, J. -L.; Zhang, L.; Long, S.; Zhou, Y.] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.;[Deng, T.] Cent S Univ Forestry & Technol, Inst Appl Chem, Sch Sci, Changsha 410014, Hunan, Peoples R China.
通讯机构：
[Cao, Z.] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
gold plate electrode;Gd doped;TiO2 nanoparticle;nitrite;electrochemical analysis
摘要：
A simple gold plate electrode (GPE) based on a gadolinium-doped titanium dioxide (Gd/TiO2) ultrathin film was successfully constructed by using a surface sol-gel technique, and used for the detection of trace amounts of nitrite in cured foods. The Gd/TiO2 nanoparticles were synthesised and characterised via scanning electron microscopy (SEM) and X-ray diffraction (XRD), indicating that the Gd-doped TiO2 formed an anatase phase through roasting at 450°C, generating actively interstitial oxygen at the interface of the surface of TiO2 lattice surrounded by Gd3+. The electro-catalytic effect for oxidation of nitrite on the modified electrode was investigated by cyclic voltammetry in 0.10 mol l-1 sulfuric acid media solution, showing that the modified electrode exhibited excellent response performance to nitrite with good reproducibility, selectivity and stability. The catalytic peak current was found to be linear with nitrite concentrations in the range of 8.0 × 10-7 to 4.0 × 10-4 mol l-1, with a detection limit of 5.0 × 10-7mol l-1 (S/N = 3). The modified electrode could be used for the determination of nitrite in the cured sausage samples with a satisfactory recovery in the range of 95.5-104%, showing its promising application for food safety monitoring. © 2012 Copyright Taylor and Francis Group, LLC.
语种：
英文
展开
超声波对盐基胶体钯活性及稳定性的影响
作者：
肖忠良;丁雨;周英;周婷;曹忠;...
期刊：
精细化工中间体 ,2012年42(2):47-49+72 ISSN：1009-9212
作者机构：
长沙理工大学 化学与生物工程学院,湖南省电力和交通重点实验室,湖南长沙410004;[周婷; 肖忠良; 周英; 曹忠; 曾巨澜; 丁雨] 长沙理工大学
关键词：
盐基胶体钯;化学镀铜;活性;超声波
摘要：
通过测量混合电位和考察催化化学镀铜效果,研究了超声波对盐基胶体钯活性及稳定性的影响。结果表明,超声波作用时间为0~20 min时,随着超声时间的增加,配置的胶体钯活化液的诱导时间缩短,活性增加,镀铜效果好,随后超声的效果趋缓。超声波作用后的盐基胶体钯180 d后仍然保持良好的活性,稳定性好。
语种：
中文
展开
Sb（Ⅲ）-HCl-H_2O体系中Sb（Ⅲ）浓度分布的理论计算
作者：
肖忠良;杨换丽;周英;曹忠;曾巨澜;...
期刊：
长沙理工大学学报(自然科学版) ,2012年9(3):83-87 ISSN：1672-9331
作者机构：
长沙理工大学电力与交通材料保护湖南省重点实验室,湖南长沙,410004;湖南大学化学化工学院,湖南长沙,410082;[周俊] 湖南大学;[肖忠良; 周英; 曹忠; 杨换丽; 曾巨澜] 长沙理工大学
关键词：
锑(Ⅲ)分布;Sb(Ⅲ)-HCl-H2O体系;热力学计算
摘要：
针对Sb（Ⅲ）-HCl-H2O体系,应用热力学计算方法,根据同时平衡原理,建立了数学模型,以Sb（Ⅲ）的总浓度5×10-5 mol/L为例,计算了不同pH时Sb（Ⅲ）的各种存在形式的浓度分布.计算结果表明,pH=1.3～4.0时,SbO＋是主要存在形式,且n（SbO＋）/n（Sb总）〉99.8%.
语种：
中文
展开
结晶氯化钙/膨胀石墨复合相变材料
作者：
段志军;张焕芝;孙立贤;曹忠
作者机构：
[段志军; 张焕芝; 孙立贤; 曹忠] 长沙理工大学;[段志军; 张焕芝; 孙立贤; 曹忠] 中国科学院大连化学物理研究所
会议名称：
第十六届全国相图学术会议暨相图与材料设计国际研讨会
会议时间：
2012-10-19
会议地点：
常州
会议论文集名称：
第十六届全国相图学术会议暨相图与材料设计国际研讨会论文集
关键词：
相变材料;制备工艺;结晶氯化钙;膨胀石墨;性能测试
摘要：
本论文阐述了结晶氯化钙/膨胀石墨复合相变材料的制备，表征以及热性能测试。结晶氯化钙被吸附在支撑材料膨胀石墨的微孔之中，从而形成复合材料。复合材料的相变焓相变温度用DSC Q1000进行测试。复合材料热稳定性用TG(Cahn TherMax 500)进行测试，其导热系数用HotDisk TPS 2500进行测试，结果表明制备的复合材料性能具有很大改进。
语种：
中文
展开
Heat capacities and thermodynamic properties of M(HBTC)(4,4 '-bipy)center dot 3DMF (M = Ni and Co)
作者：
Zhou, Yi-Xi;Sun, Li-Xian;Cao, Zhong* ;Zhang, Jian;Xu, Fen;...
期刊：
Journal of Thermal Analysis and Calorimetry ,2012年110(2):949-954 ISSN：1388-6150
通讯作者：
Cao, Zhong
作者机构：
[Zhou, Yi-Xi; Cao, Zhong] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.;[Zhou, Yi-Xi; Sun, Li-Xian; Zhao, Zi-Ming; Zhang, Jian; Song, Li-Fang; Zou, Yong-Jin] Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China.;[Xu, Fen] Liaoning Normal Univ, Fac Chem & Chem Engn, Dalian 116029, Peoples R China.
通讯机构：
[Cao, Zhong] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
会议名称：
Symposium on Applications of Thermal Analysis and Calorimetry - Workshop and Exhibition (SATAC) 11th National Convention of Chemistry Teachers, India
会议时间：
OCT 15-17, 2011
会议地点：
undefined, INDIA
会议主办单位：
[Zhou, Yi-Xi;Cao, Zhong] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.^[Zhou, Yi-Xi;Sun, Li-Xian;Zhang, Jian;Song, Li-Fang;Zhao, Zi-Ming;Zou, Yong-Jin] Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China.^[Xu, Fen] Liaoning Normal Univ, Fac Chem & Chem Engn, Dalian 116029, Peoples R China.
关键词：
Metal-organic framework;Molar heat capacity;TGA;TMDSC
摘要：
Two metal–organic frameworks (MOFs) of M(HBTC)(4,4′-bipy)·3DMF [M = Ni (for 1) and Co (for 2); H3BTC = 1,3,5-benzenetricarboxylic acid (1,3,5-BTC); 4,4′-bipy = 4,4′-bipyridine; DMF = N,N′-dimethylformamide] were synthesized by a one-pot solution reaction and a solvothermal method, respectively, and characterized by powder X-ray diffraction and FT-IR spectra. The low-temperature molar heat capacities of M(HBTC)(4,4′-bipy)·3DMF were measured by temperature-modulated differential scanning calorimetry (TMDSC) for the first time. The thermodynamic parameters such as entropy and enthalpy relative to reference temperature 298.15 K were derived based on the above molar heat capacity data. Moreover, the thermal stability and the decomposition mechanism of M(HBTC)(4,4′-bipy)·3DMF were investigated by thermogravimetry analysis (TGA). The experimental results through TGA measurement demonstrate that both of the two compounds have a three-stage mass loss in air flow.
语种：
英文
展开
