检索结果-南通市图书馆

Ultrasensitive electrochemical determination of metronidazole based on polydopamine/carboxylic multi-walled carbon nanotubes nanocomposites modified GCE

在线全文

学校读者我要写书评

暂无评论

Journal of Pharmaceutical Analysis 2018年第2期8卷 124-130页

作者： Satar Tursynbolat Yrysgul Bakytkarim Jianzhi Huang lishi wang School of Chemistry and Chemical Engineering South China University of Technology

An ultrasensitive electrochemical sensor based on polydopamine/carboxylic multi-walled carbon nanotubes(MWCNTs à COOH) nanocomposites modified glassy carbon electrode(GCE) was presented in this work, which has been developed for highly selective and highly sensitive determination of an antimicrobial drug, metronidazole. The preparation of polydopamine/MWCNTs–COOH nanocomposites/GCE sensor is simple and possesses high reproducible, where polydopamine can be coated on the surface of MWCNTs–COOH via a simple electropolymerization process. Under optimized conditions, the proposed sensor showed ultrasensitive determination for metronidazole with a wide linear detection range from5 to 5000 mmol/dm^3 and a low detection limit of 0.25 mmol/dm^3(S/N=3). Moreover, the proposed sensor has been successfully applied for the quantitative determination of metronidazole in real drug samples. This work may provide a novel and effective analytical platform for determination of metronidazole in application of real pharmaceutical and biological samples analysis.

关键词： Metronidazole Polydopamine Carboxylic multi-walled carbon nanotubes Nanocomposites Electrochemical determination Electrochemical sensor

Highly sensitive simultaneous electrochemical determination of myricetin and rutin via solid phase extraction on a ternary Pt@r-GO@MWCNTs nanocomposite

在线全文

学校读者我要写书评

暂无评论

Journal of Pharmaceutical Analysis 2019年第5期9卷 358-366页

作者： Satar Tursynbolat Yrysgul Bakytkarim Jianzhi Huang lishi wang School of Chemistry and Chemical Engineering South China University of Technology

The simultaneous electrochemical determination of myricetin and rutin remains a challenge due to their indistinguishable *** solve this problem,we constructed a ternary platinum nanoparticle,reduced graphene oxide,multi-walled carbon nanotubes (Pt@r-GO@MWCNTs) nanocomposite via a facile one-pot synthetic *** the optimized conditions,the ternary Pt@r-GO@MWCNTs nanocomposite exhibited good electrocatalytic activity toward myricetin and rutin via solid phase extraction and excellent performance for the simultaneous determination of myricetin and *** oxidation peak current of myricetin was proportional to its concentrations in the range of 0.05-50μM with a detection limit of 0.01μM (S/N=3).The linear range for rutin was 0.05-50μM with a detection limit of 0.005μM(S/N=3).The ternary nanocomposite sensor also exhibited good reproducibility and stability,and was successfully used for the simultaneous determination of myricetin and rutin in real orange juice samples with recoveries ranging between 100.57% and 108.46%.

关键词： Ternary nanocomposite Simultaneous determination Electrochemical sensor Myricetin Rutin

Non-enzymatic browning path analysis of ready-to-eat crayfish(Promcambarus clarkii)tails during thermal treatment and storage

在线全文

学校读者我要写书评

暂无评论

Food Bioscience 2023年第1期51卷 1100-1108页

作者： Qixing Jiang Huimin Shen Pei Gao Peipei Yu Fang Yang Yanshun Xu Dawei Yu Wenshui Xia lishi wang State Key Laboratory of Food Science and Technology School of Food Science and TechnologyJiangnan UniversityWuxiJiangsu214122China Collaborative Innovation Center of Food Safety and Quality Control of Jiangsu Province Jiangnan UniversityWuxiJiangsu214122China

This study was carried out to reveal the browning path of ready-to-eat(RTE)crayfish tails during thermal treatment and storage using path *** reactions,lipid oxidation,and phenol oxidation were evaluated in combination with free radical content and FTIR analysis,and direct path coefficients as well as determination coefficients were obtained based on these parameters,such as the absorbance at 294 nm(A294),5-hydroxymethylfurfural(5-HMF),thiobarbituric acid-reactive substances(TBARS),and total phenols(TP).The result showed that the browning of seasoned RTE crayfish tails was ascribe to the synergistic effect of Maillard reaction and lipid oxidation by the order of determination *** the crayfish hepatopancreas were removed,the content of A294,5-HMF,TBARS,and TP declined more than 30%,specifically affecting the direct pathway from lipid oxidation to Maillard reaction and alleviating the ***,no significant change of color was observed in the group without thirteen-spices,while TBARS and free radical content increased by at least 16.7%.The removal of hepatopancreas and the control of Maillard reaction were deemed to be a good measure for inhibiting the non-enzymatic browning of RTE crayfish tails.

关键词： RTE crayfish Tails Non-enzymatic browning Path analysis Maillard reaction Lipid oxidation

基于多维模态方法的流体二维非线性强迫晃动分析

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

振动与冲击 2017年第16期36卷 159-165页

作者：李遇春刘哲王立时同济大学水利工程系上海200092

基于多模态方法分析了二维容器内液体的强迫非线性晃动问题,采用绝对速度势函数描述动坐标下的流体非线性运动,根据Bateman-Luke变分原理,将非线性自由边值问题转化为等效的泛函极值问题,将自由液面波高函数和绝对速度势函数展开为广义F... 详细信息

基于多模态方法分析了二维容器内液体的强迫非线性晃动问题,采用绝对速度势函数描述动坐标下的流体非线性运动,根据Bateman-Luke变分原理,将非线性自由边值问题转化为等效的泛函极值问题,将自由液面波高函数和绝对速度势函数展开为广义Fourier级数,得到相互耦合的有限维非线性模态系统(一组非线性常微分方程),采用Runge-Kutta(龙格-库塔)法求解非线性常微分方程组,从而得到液体的强迫非线性晃动响应,分别模拟并讨论了矩形容器内液体在强地震作用下的晃动响应、在水平谐波作用下的普通共振稳态响应、在竖向谐波作用下的参数共振稳态响应,预测了液体在普通共振与参数共振共同作用下的液面响应。将多模态结果与其它数值方法的结果进行了对比,计算结果表明,多模态方法在长时间非线性稳态响应分析上具有其独特的优势。

关键词：多维模态二维非线性晃动强震响应共振响应参数共振响应

6-23 Design of Circulating Cooling Water System for LEAF

在线全文

学校读者我要写书评

暂无评论

IMP & HIRFL Annual Report 2016年第1期 275-276页

作者： Zhu Tieming Zhang Bin Chen Wei wang lishi wang Dingjiu 不详

The Low Energy Accelerator Facility(LEAF)comprises a superconducting ion source,a LEBT,an RFQ,a MEBT and a test *** comprises a lot of power electronics and consumes a large amount of electricity,which will eventually be converted into *** function of process circulating cooling water is to absorb and transfer the heat produced by these equipments,and realize the constant temperature regulating means of certain temperature sensitive parts,so as to ensure the long-term,reliable and stable operation of the LEAF *** design requirement parameters are shown in Table *** water subsystem 1.

关键词：

PREPARATION OF LN_2 TEMPERATURE REGION SUPERCONDUCTOR FILM ON Si(100) SUBSTRATE

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1989年第12期2卷 444-446页

作者： HU Qingyu ZHAO Hangwei WEN lishi wang Yongzhong QIAO Guiwen Institute of Metal Research,Academia Sinica,Shenyang,China

Expermental results of the preparation of YBaCuO superconductor thin film on Si(100) substrate by the method of ion beam sputtering deposition is presented.A ZrO_2 buffer layer was applied to Si(100)substrate,and was found to play an important role in resisting the diffusion of Si toward the *** thin film is mainly a 123 phase with strong c-axis prefer- red *** onset transition temperature of the film is 100 K and the final transition temperature 78 K.

关键词： superconductor YBaCuO thin film Si substrate

Clustering Analysis with Information System Approaches

在线全文

学校读者我要写书评

暂无评论

Clustering Analysis with Information System Approaches

2011 Chinese Control and Decision Conference（CCDC）

作者： lishi Zhang,Xianchang wang,and Xueda Zhao

With the large number of attributes,clustering analysis of data is involved into the reduction of its attributes The main task of the present work is to construct a novel clustering analysis method motivated by the fundamental idea from information system,the computer simulation shows that the reduction of attributes gives a better accuracy of clustering rate.

关键词： Reduction of attribute Information system Indiscernibility relation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

不同截面水槽流体参数晃动的SPH模拟

计算物理 2013年第5期30卷 642-648页

作者：王庄李遇春王立时同济大学土木工程学院上海200092

用光滑粒子流体动力学方法(SPH)对几种不同截面水槽内的流体参数晃动问题进行数值模拟.以二维矩形截面水槽为例,对其一阶正对称参数晃动过程进行分析,验证这一非线性晃动问题特征:包括水体波动特性,频率关系.对U形和圆形截面的前二阶反... 详细信息

用光滑粒子流体动力学方法(SPH)对几种不同截面水槽内的流体参数晃动问题进行数值模拟.以二维矩形截面水槽为例,对其一阶正对称参数晃动过程进行分析,验证这一非线性晃动问题特征:包括水体波动特性,频率关系.对U形和圆形截面的前二阶反对称与正对称参数晃动过程进行数值模拟.结果表明:SPH方法可以有效地实现槽内流体在竖向谐振作用下的参数晃动过程.

关键词：参数晃动 SPH方法不同截面数值模拟

AA5052铝合金/AZ31B镁合金搅拌摩擦焊接头的腐蚀行为研究

在线全文

学校读者我要写书评

暂无评论

材料导报 2023年第4期37卷 147-153页

作者：蔡达王立世胡心彬湖北工业大学材料与化学工程学院武汉430068 绿色轻工材料湖北省重点实验室武汉430068

采用搅拌摩擦焊的方法得到了外观成形良好的Al合金/Mg合金接头。为了研究其腐蚀行为和腐蚀机理,在分析焊接接头显微组织的基础上,采用中性盐雾腐蚀试验和电化学测试的方法对其腐蚀行为进行监测和分析,并对焊接接头的腐蚀失重进行了分析... 详细信息

采用搅拌摩擦焊的方法得到了外观成形良好的Al合金/Mg合金接头。为了研究其腐蚀行为和腐蚀机理,在分析焊接接头显微组织的基础上,采用中性盐雾腐蚀试验和电化学测试的方法对其腐蚀行为进行监测和分析,并对焊接接头的腐蚀失重进行了分析研究。结果表明,铝镁金属间化合相和镁合金中的β相在搅拌区和热力影响区中分布的不均匀性,以及区域晶粒大小的差异,导致搅拌区和热力影响区形成微区原电池的倾向不同,从而表现出腐蚀形貌和腐蚀行为的差异。电偶腐蚀的发生导致焊接接头的腐蚀电流密度较高,耐腐蚀性能不及母材。在整个中性盐雾腐蚀过程中,腐蚀失重逐渐增加,腐蚀速率呈现出先上升后下降的趋势。

关键词：铝合金镁合金搅拌摩擦焊异种接头腐蚀行为