检索结果-南通市图书馆

The Determination of Iodide Based on a Flow-injection Coupling Irreversible Biamperometry

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2005年第12期16卷 1629-1632页

作者： Li Jun LI Hao CHENG Wen Yi HUANG Hong Xing KONG jian ling wu jian Ping LU Wei GAO Jun Feng SONG Department of Biological and Chemical Engineering Guangxi University of Technology Liuzhou 545006 College of Chemistry and Chemical Engineering Guangxi University Nanning 530004 Institute of Analytical Science. Northwest University Xi＇an 710069

A novel flow-injection irreversible biamperometric method is described for the direct determination of iodide. The method is based on electrochemical oxidation of iodide at the gold electrode and the reduction of permanganate at the platinum electrode to form an irreversible biamperometric detection system. Under the applied potential difference of 0 V, in the 0.05 mol/L sulfuric acid, iodidecan be determined over the range 4.00×10^-7-1.00×10^-5 mol/L with a sampling frequency of 120 samples per hour. The detection limit for I- is 3.0×10^-7 mol/L and the RSD for 40 replicate determinations of 4.0×10^-5 mol/L potassium iodide is 1.68%. The new method was applied to the analysis of iodide in table salt with satisfactory results.

关键词： Iodide flow injection irreversible biamperometry gold electrode platinum electrode

Determination of chlorogenic acid by flow injection irreversible biamperometry

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2007年第4期18卷 431-434页

作者： Li Jun Li Qi Feng Chen Lai Bo Yu Zhao Heng Zhong Jun Feng Hao Cheng Hong Xing Kong jian ling wu Department of Biological and Chemical Engineering Guangxi University of Technology Liuzhou 545006 China College of Chemistry and Chemical Engineering Guangxi University Nanning 530004 China

A flow injection irreversible biamperometric method for the determination of chlorogenic acid is described. The proposed method is based on the electrochemical oxidation of chlorogenic acid at pretreated platinum electrode and the reduction of permanganate at another electrode to form an irreversible biamperometric detection system. Under the external potential difference （z^v） of 0 V, in the 0.05 mol/L sulfuric acid, chlorogenic acid can be determined over the range 0.8-120 mg/L with a sample measurement frequency of 80 samples/h. The detection limit is 0.18 mg/L. The proposed method exhibits the satisfactory reproducibility with a relative standard derivation （R.S.D.） of 2.21% for 19 successive determinations of 40 mg/L.

关键词： Flow injection Irreversible biamperometry Chlorogenic acid Honeysuckle

Natural radioactivity level of associated bone-coal mining area in Zhejiang Province

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2005年第5期16卷 310-314页

作者： YE Ji-Da ZHENG Hui-Di SONG Wei-Li ZENG Guang-jian WANG Sha-ling wu Zong-Mei Environmental Radiation Monitoring Station of Zhejiang Province Hangzhou 310012

The geographic distribution, γ-radiation level and specific activity of radionuclides of the bone-coal mines in Zhejiang Province were reported. The weighted average of γ-radiation dose rate of the bone-coal mines is 566 nGy/h for 107 main bone-coal mines. The weighted mean activity of 238U, 226Ra, 232Th and 40K in the samples are 949, 918, 34 and 554 Bq/kg for 171 samples of bone-coal, respectively.

关键词：浙江放射性物质放射性污染骨煤海洋污染

An Effective Model for Predicting Acute Kidney Injury Following Liver Transplantation

在线全文

学校读者我要写书评

暂无评论

An Effective Model for Predicting Acute Kidney Injury Follow...

2009年浙江省外科学学术年会

作者： The First Affiliated Hospital Zhejiang University School of Medicine ShuSen Zheng Xiao Xu Qi ling jian wu Feng Gao Zenglei He Qiang Wei

Background Acute Kidney injury(AKI) is a common complication in the early period post-liver transplantation(LT),posing an enormous obstacle to treatment efficiency and patient survival. However,the exact influencing factors of AKI are still unclear and a predicting model for AKI is desperately required in the *** Data of 102 consecutive liver transplants were reviewed in China,where most of patients underwent LT for hepatitis B-related liver diseases.A model for predicting AKI was established and further validated in a prospective *** was defined as an increased level of serum creatinine(>1.5mg/dL) or/and need for renal replacement therapy during the first week *** The incidence of AKI was 34.3%.Compared with non-AKI patients,AKI patients showed a significant lower survival rate. Multivariate analysis demonstrated the independent influencing factors of AKI were preoperative serum creatinine level>1.2 mg/dL,intraoperative urine output≤60 ml/h,intraoperative hypotension status,and intraoperative use of noradrenaline.A model was then established and showed a sensitivity of 86.7%,a specificity of 100% and an accuracy of 95.5%in predicting *** High preoperative serum creatinine level, low intraoperative urine output,and intraoperative hypotension contributed to the development of AKI and intraoperative use of noradrenaline presented as a protective *** predictive model could potentially facilitate early prediction and surveillance of AKI following LT especially in the patients with hepatitis-B related liver diseases.

关键词：

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

积极送经机构研究

四川纺织科技 2004年第3期 13-16页

作者：孔令剑吴红湖南省苎麻技术研究中心湖南长沙410007

介绍了积极送经机构的特性。通过线性模型和非线性模型的试验 ,得出有关积极送经机构运行原理和发展趋势的信息。

关键词：送经机构经纱干扰模型

Arterial Baroreflex Function is an Important Determinant on the Acute Cerebral Ischemia in Rats with Middle Cerebral Artery Occlusion

在线全文

学校读者我要写书评

暂无评论

Arterial Baroreflex Function is an Important Determinant on ...

2008心血管药理学术研讨会

作者： Ai-Jun Liu Gang ling jian wu Fu-Ming Shen Li-Li Lin jian-Guo Liu Ding-Feng Su Department of Pharmacology,School of Pharmacy,Second Military Medical University,Shanghai 200433

This study aimed to clarify whether arterial baroreflex(ABR)function is an important determinant on the acute cerebral ischemia in *** animal models were used in this ***,saponin conjugated with substance P(SP-SAP)was...

关键词：

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

三级倒立摆系统模糊控制器设计及仿真

系统仿真学报 2004年第3期16卷 578-581页

作者：曲建岭吴文海孙俊恩海军航空工程学院青岛分院青岛266041

提出了一种借助于系统的线性化模型设计三级倒立摆系统模糊控制器的方法。这种方法将线性系统理论与模糊控制技术相结合,将单一的复杂控制策略转化为多级控制策略嵌套,大大简化了三级倒立摆系统模糊控制器的设计步骤。仿真结果表明,该... 详细信息

提出了一种借助于系统的线性化模型设计三级倒立摆系统模糊控制器的方法。这种方法将线性系统理论与模糊控制技术相结合,将单一的复杂控制策略转化为多级控制策略嵌套,大大简化了三级倒立摆系统模糊控制器的设计步骤。仿真结果表明,该方法是可行性的。

关键词：三级倒立摆系统模糊控制融合函数作用函数

在线全文

学校读者我要写书评

暂无评论

有关临产启动的机理及预测

实用妇产科杂志 2001年第4期17卷 201-203页

作者：牟晓玲简丽吴味辛重庆医科大学附属第一医院重庆400016

有关临产启动的机制至今仍未完全阐明清楚 ,但已发现与前列腺素 (PGs)、细胞因子 (白介素 - 1β、6、8等 )、子宫肌上一些物质 (促速 G蛋白α亚单位 Gαs、h CG受体 )以及胎儿的作用等因素相关 ;且通过阴道 B超测量孕妇宫颈变化和检测... 详细信息

有关临产启动的机制至今仍未完全阐明清楚 ,但已发现与前列腺素 (PGs)、细胞因子 (白介素 - 1β、6、8等 )、子宫肌上一些物质 (促速 G蛋白α亚单位 Gαs、h CG受体 )以及胎儿的作用等因素相关 ;且通过阴道 B超测量孕妇宫颈变化和检测孕妇宫颈阴道分泌物中 IL - 6、IL - 8、β- h CG、胎儿纤维连接蛋白 (FFN)等的含量可预测临产的发生。

关键词：临产机理预测

Observation of topological charge transformations in acoustic vortex using passive periodic systems

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 140-147页

作者： Di-Chao Chen Xie Liu Changqing Xu Da-jian wu Ying Cheng Xiao-Jun Liu School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University

Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.

关键词： acoustic vortex topological charge transformation artificial structure