Electrophoretic separation of neurotransmitters on a polystyrene nano-sphere∕polystyrene sulphonate coated poly(dimethylsiloxane) microchannel

In this paper, a poly(dimethylsiloxane) microchip with amperometric detector was developed for the electrophoretic separation and determination of neurotransmitters. For increasing the separation efficiency, the microchannel is modified by polystyrene sulphonate∕polystyrene nano-sphere self-assembly coating. A stable electro-osmotic flow (EOF) and higher separation efficiency are obtained in proposed modified microchannel. Under optimized conditions, dopamine, epinephrine, catechol, and serotonin are acceptably baseline separated in this 3.5 cm length separation channel with the theoretical plate number from 4.6?×?10(4) to 2.1?×?10(5) per meter and resolution from 1.29 to 12.5. The practicability of proposed microchip is validated by the recovery test with cerebrospinal fluid as real sample which resulted from 91.7% to 106.5%.     

Electrophoretic separation of neurotransmitters on a polystyrene nano-sphere�Mpolystyrene sulphonate coated poly(dimethylsiloxane) microchannel

In this paper, a poly(dimethylsiloxane) microchip with amperometric detector was developed for the electrophoretic separation and determination of neurotransmitters. For increasing the separation efficiency, the microchannel is modified by polystyrene sulphonate∕polystyrene nano-sphere self-assembly coating. A stable electro-osmotic flow (EOF) and higher separation efficiency are obtained in proposed modified microchannel. Under optimized conditions, dopamine, epinephrine, catechol, and serotonin are acceptably baseline separated in this 3.5 cm length separation channel with the theoretical plate number from 4.6 × 10⁴ to 2.1 × 10⁵ per meter and resolution from 1.29 to 12.5. The practicability of proposed microchip is validated by the recovery test with cerebrospinal fluid as real sample which resulted from 91.7% to 106.5%.     

Beijing's West District Library Enhances International Cooperation

<正>The West District Library of Beijing is China’s first county/district-level public library granted with the member status of the International Federation of ...     

大学信息基础课程“翻转课堂”教学模式研究

随着信息技术与课程整合的日渐深入,基于网络的学习环境已成为课堂教学的重要补充,"翻转课堂"也成为了当前国内外教学改革研究的热点.本文以大学信息技术基础课程为例,提出并构建了基于大学信息基础课程的"翻转课堂"教学模式,并从教学理念、教学中心、教学方法、教师与学生的角色、评价体制等方面对该教学模式进行了诠释.     

藏书票的艺术价值分析

藏书票是图书主人的标志,它是贴在图书扉页上的文图并茂的艺术品,是一种高雅的艺术形式.其在国外文化圈中一直流传,但中国文化人却知之甚少.除了具有一定的实用价值外,它的艺术价值主要体现在艺术的独特性、表现形式的多样性、赏心悦目的美感、文化的交流性与人文精神的寄托与表现.     

高职制药校内外生产性实训基地功能定位探析

针对高职制药类专业生产性实训基地建设水平低的现状,分析制药校内外生产性实训基地发展缓慢的原因,提出制药生产性实训基地建设首先要解决功能定位问题;制药类专业生产性实训基地应以药物研发、社会服务为方向,将“药品生产”型实训基地通过深化校企合作建在校外企业。     

任务型教学法在高级英语教学中的应用

以学生为中心的任务型教学法在独立学院高校英语专业教学中的应用日渐普遍。文章以高级英语教学实践为例,重点分析根据任务型教学法的原则和结构模式,合理设计独立学院高级英语课堂教学任务。     

古代文学作品中体育活动的描写

诗词、歌赋、笔记、戏曲、小说等各类古代文学作品中留下了大量有关体育娱乐的记载与描写,构成了体育文化的重要部分,本文对此做了简略的梳理和概括。     

后控规范的计算机处理

分析了建立情报检索系统时受控主题标引的不足之处：标引效率低、语义网得不到扩充、不一致的组配标引。提出了以后控规范为基础的标引体系。为使后控规范能方便地由计算机实现，研究了利用相似性匹配技术找出语义上有一定联系的术语，并由计算机半自动地建立用、代、属、分、参等语义关系的方法。     

Web环境下企业竞争对手情报收集方法分析

随着互联网的发展,基于网络环境下的竞争对手情报的收集显得尤为重要。本文主要介绍了目前比较常用的基于网络环境下的竞争对手情报收集的方法以及强调网络环境下对竞争对手情报的收集的重要性。