Molecularly imprinted polymers as the extracted sorbents of clenbuterol ahead of liquid chromatographic determination

A pre-treatment methodology for clenbuterol hydrochloride (CLEN) isolation and enrichment in a complex matrix environment was developed through exploiting molecularly imprinted polymers (MIPs). CLEN-imprinted polymers were synthesized by the combined use of ally-β-cyclodextrin (ally-β-CD) and methacrylic acid (MAA), allyl-β-CD and acrylonitrile (AN), and allyl-β-CD and methyl methacrylate (MMA) as the binary functional monomers. MAA-linked allyl-β-CD MIPs (M-MAA) were characterized by Fourier transform-infrared (FT-IR) spectroscopy and a scanning electron microscope (SEM). Based upon the results, M-MAA polymers generally proved to be an excellent selective extraction compared to its references: AN-linked allyl-β-CD MIPs (M-AN) and MMA-linked allyl-β-CD MIPs (M-MMA). M-MAA polymers were eventually chosen to run through a molecularly imprinted solid-phase extraction (MISPE) micro-column to enrich CLEN residues spiked in pig livers. A high recovery was achieved, ranging from 91.03% to 96.76% with relative standard deviation (RSD) ≤4.45%.     

生物学教学与科研设计中的常见错误分析

当前，生物学与数理方法的结合变得更加紧密，生物学科研需要运用统计学原理和方法来进行定性和定量研究，并进行科学的试验设计。但是在运用的同时，有时也会犯一些错误。下面是几个比较普遍和有代表性的问题。     

畅销书何以畅销--畅销书构成要素刍议

畅销书因其销量大，能获得较高的经济效益，而成为每家出版社追求的目标。畅销书的构成要素有选题策划、编创形式、时效性和宣传等。     

期刊网站页面自适应分析及重构

基于响应式网页设计的理念、特点,对比分析传统期刊网站与响应式网页设计的价值特性,以“用户为中心”对期刊网站在个人电脑和不同移动设备平台上的文字、图片及控件等信息进行自适应分析及重构设计,为期刊用户在移动设备上访问期刊网站提供新的解决方案和参考,对于期刊网站的建设具有较好的实践意义和指导意义。     

如何提高学生学习信息技术课的兴趣

中小学生信息技术教育是我国教育信息化建设的重要组成部分.在当前,基于信息技术教育方面的课程整合、校园网、校校通、网络教育资源库,以及基于网络的研究性学习等焦点、热点问题层出不穷,此可谓"热".然而,"学生喜欢玩电脑,但最不喜欢上信息技术教育课"却几乎成了普通现象,此又可谓"冷".看来,要将社会的期望转化为学生的心愿,要真正使学生学好这门课程,去适应社会日益信息化的趋势,还需要从提高学生学习信息技术教育课的兴趣入手.     

Features of the Formation of Multi-view Autostereoscopic Image without Vertical Parallax

1.Introduction The reproduction systems of 3D images without using eyeglasses and other special accessories has always attracted attention and aroused great interest of developers and consumers of such equipment because of totally accurate image and method of its presentation.Such systems can be used and are already partially used in advertising,television,different devices (i.e.smartphones,tablet computers),at the exhibitions,etc.,as well as in various technical applications,training systems,simulators,etc.     

埃及高等教育的问题及应对措施

埃及高等教育存在着教学条件不足、教学资源紧缺、教育质量滑坡、毕业生就业问题日益严重等问题.为此,埃及政府在经费投入、质量保障、大学生就业方面出台了许多新的政策举措.     

ATM犯罪探讨

随着ATM犯罪的不断上升,中国社会各界正面临着这种犯罪带来的诸多危害,也更加关切如何才能有效预防这种犯罪。本文就ATM犯罪的法律界定和其他一些有争议的相关法律问题进行了阐述,并就现在的相关政策作了评议并提出了一些改良建议。     

Example based painting generation

INTRODUCTION Non-photorealistic rendering (NPR) is a domain of computer graphics that has received more and more attention in the past decade. Different from realistic rendering, NPR concentrates on communicating the main context of an image and explores the rendering effect of the scene with the artistic styles, rather than seeking subtle geometry details and naturally physical attribute. Many research efforts were dedicated to simu- lating the traditional media (Hertzmann et al., 2001…     

心衰康煎液对阿霉素心衰模型大鼠心肌的影响

目的观察中药复方制剂"心衰康煎液"对心衰大鼠心脏血流动力学的影响及心肌细胞的病理学改变.方法利用pclab实验记录分析系统观察和分析各实验组大鼠左心室内压、对大鼠心肌切片H.E染色镜下观察.结果心衰康使心衰得到明显改善,心肌细胞无明显变性、坏死.结论中药复方"心衰康煎液"对心衰大鼠的心肌病变有明显改善,从而产生良好的抗心衰作用.结论