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Search Results: 1 - 10 of 36681 matches for " 冯施施 "
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单壁碳纳米管修饰电极测定聚碳酸酯塑料中的双酚A
Determination of Bisphenol A in Polycarbonate Plastic Products Using Single-Walled Carbon Nanotubes Modified Glassy Carbon Electrode
 [PDF]

志玲, 刘青, , 林莹莹, 林思思, 翁雪香
Advances in Analytical Chemistry (AAC) , 2015, DOI: 10.12677/AAC.2015.54006
Abstract:
用循环伏安法(CV)研究了环境激素双酚A (BPA)在单壁碳纳米管(SWNTs)修饰电极上的电化学行为。实验结果表明,在pH = 8.0的磷酸盐缓冲溶液中,BPA在碳纳米管修饰电极上的电化学行为是受吸附控制的不可逆电化学氧化过程。在优选的实验条件下,峰电流与BPA浓度在0.04~8 μM范围内呈良好的线性关系,其中检测限为23 nM (3倍信噪比)。该方法简单,快速,灵敏,可用于矿泉水瓶等塑料制品中BPA的检测。
Direct electrochemistry of bisphenol A (BPA) at the single-walled carbon nanotubes (SWNTs) modified glassy carbon electrode (GCE) is studied in this paper. The experimental results show that the electrochemical behavior of BPA on carbon nanotubes modified electrode is an irreversible electrochemical oxidation process controlled by adsorption in phosphate buffer solution (pH 8.0). Under the optimised experimental conditions, the proposed biosensor exhibits a wide linear range of 0.04 - 8 μM with a low detection limit of 23 nM. This method is simple, fast and suitable for analysis of BPA in polycarbonate products.
两种丝孢类昆虫病原真菌对朱砂叶螨卵的侵染及杀灭活性
卫兵,明光
科学通报 , 2003,
Abstract: 朱砂叶螨Tetranychuscinnabarinus是多食性主要农业害螨,对化学杀螨(虫)剂抗药性极强,尤其缺乏有效的螨卵灭除剂.通过生物测定发现,球孢白僵菌BeuaveriabassianaSG8702菌株和玫烟色拟青霉PaecilomycesfumosoroseusPfr153菌株能有效侵染该螨的卵,使其致死而不孵化,受染卵变形变瘪,在保湿条件下卵表长出菌物并产生大量分生孢子.在58,298和1306个孢子/mm2的接种剂量处理(每剂量重复3次,每重复35~65粒卵)下,SG8702在25℃和12L︰12D条件下对螨卵的校正侵染致死率分别为(20.4±4.2)%,(36.0±7.6)%和(64.6±12.5)%,Pfr153在129,402和2328个孢子/mm2的接种剂量下分别致死螨卵(16.1±11.1)%,(44.2±13.3)%和(63.4±1.7)%,而两次生测对照处理中的螨卵自然死亡率分别仅为7.8%和10.3%.根据几率分析结果,SG8702和Pfr153对供试螨卵的LC50分别为548(393~858)和914(625~1550)个孢子/mm2,显示前者的杀卵效果优于后者.这是关于丝孢类昆虫病原真菌杀螨卵活性的首次发现和报道.
新型快速分离介质灌流硅胶微球的合成及应用
治国,钰锜
分析化学 , 2009,
Abstract: 将硅酸乙酯、过硫酸钾、盐酸、甲基丙烯酸钠共混,在一定条件下水解、聚合,经真空处理后,分散至石蜡油中,控制反应温度进行溶胶-凝胶化转变,合成了灌流硅胶微球材料.采用扫描电镜仪、比表面孔径测试仪、压汞仪等对其进行了表征,发现该微球材料具有多级孔结构,即纳米尺度的中孔和微米尺度的穿透孔.中孔能够提供大的比表面,而穿透孔有利于流动相通过,实现对流传质.该材料经十八烷基三乙氧基硅烷改性后,成功应用于苯同系物的高效快速分离.
含变涡动系数的超浅海风暴潮模型
士筰,
华东政法大学学报 , 1980,
Abstract: 超浅海风暴潮模型提出后[2],对渤海风潮,作为超浅海问题,进行了数值研究[1]。其结果的分析和观测资料的比较都表明了该模型有一定的应用价值;故,对超浅海风暴潮模型作进一步的探讨是有一定意义的。尤其因为我国是一个多浅水域和多风暴潮的国家,这种研究就具有更重要的意义。
闪烁陶瓷及其在医学X-CT上的应用
陈积阳,,,剑林
硅酸盐学报 , 2004,
Abstract:
用户满意度测评工具在公共图书馆的适用性调整
春林,继强
图书情报工作 , 2015,
Abstract: ?[目的/意义]目前公共图书馆缺乏用户满意度的深入研究成果,开展测评工具在这个领域的适用性研究显得尤为重要,对通用满意度测评工具在公共图书馆的适用性进行调整,并探索测评工具适用性调整的可行性思路。[方法/过程]采用体验式验证方法,从测评工具的逻辑结构、测评量表等级以及样本采集范围入手进行调整。[结果/结论]用户满意度是服务质量测评的一个重要维度,测评模型与方法直接影响测评结果。测评指标的设置要有针对性,不要刻意地做特殊化设计;调查问卷的难度要适中,测评量表等级以5级为宜;应当减少抽样调查的随机性,适当控制向未成年人发放问卷的数量。
企业社会责任声誉对消费者购买意向的影响分析
The Effects of Corporate Social Responsibility on Purchase Intention of Consumers
 [PDF]


Modern Management (MM) , 2014, DOI: 10.12677/MM.2014.43005
Abstract:
多年来,消费者一直是推动企业社会责任发展的重要力量。本文基于消费者视角,通过问卷调查研究了企业社会责任与消费者购买意向之间的关系,并验证了企业对消费者的责任、环境保护、社会支持与贡献对消费者购买意向具有正向影响作用的三个假设。
For many years in the past, consumers has always been important power to promote the devel-opment of corporate social responsibility. Based on the consumer perspective, this dissertation gives an introduction to the contents and related theories of corporate social responsibility. The dissertation proposes the conceptual framework based on previous studies to study the relation-ship between corporate social responsibility and the purchase intention of consumers, through the questionnaire survey, and then proposes three hypotheses that the responsibility to consumers, environmental protection and social support and contribution have positive effects on consumers’ purchase intention. All the three hypotheses have been proved.
中西方自我差异溯源
The Origin of the East-West Differences in Self
 [PDF]

媛媛
Advances in Psychology (AP) , 2013, DOI: 10.12677/AP.2013.36053
Abstract: 自我的形成受到时代和社会发展的影响和制约,与不同社会文化结构相联系。中西方自我的差异是近年来文化心理学的热点问题。该文从中西方文明发展进程中追溯中西方自我的差异,探讨了东西方不同的自然经济结构、语言文字、神话传说、世界观、人性论与实践论、生理因素等。研究发现,家庭本位的农耕文化使得中国先民“天人合一”的思想有浓厚的伦理蕴意,作为家庭扩展的古代社会以人伦礼教规范人们的言行,强化了关系取向的自我的同时,也禁锢了个性与创造性。西方文明从工商文化中获得了一种独立自主的自我,在自然环境斗争的过程中,“主客二分”的思维方式赋予了先民个性与理性,以此为基础发展了西方社会的科学技术与法律制度。
The formation of self is constrained by the times and social development, and linked to different social and cultural structures. Recently, the difference between Chinese and Western self is a hot issue in cross-cultural psychology. In this article, we tried to illustrate how the East-West differences in the self are originated from the progress of Chinese and Western civilizations, and traced back to two types of philosophical thinking: “unity of heaven and human” and “subject-object dichotomy”. We first discussed factors that could influence people’s self, specifically, the differences in natural economic structure, physiological structure, language and words, myths and legends etc. Then, when it comes to the world view, we discussed different views of human nature and practice. Family-based agricultural culture gives the Chinese people a strong ethical idea, for example, in the ancient China, society, as the extended family, laid a strong foundation for the relationships among people and for the ethics to regulate people’s behaviors. It limited Chinese individuality, personality and creativity. In contrast, Western civilization has gained from the business culture of an autonomous self. They struggled with the natural environment. The way of thinking, “subject-object dichotomy”, nurtures a special personality and intelligence, which is also the basis for the development of science and law system in the West.
微生物脂多糖的产生、分离及乳化性能
邑屏,,李祖义
生物工程学报 , 1989,
Abstract: Acinetobacter sp.生长在醇类、植物油或正烷烃中能产生胞外脂多糖。探讨了此菌株产生胞外脂多糖的最佳条件,包括不同碳源.不同氨源,二价镁离子及添加抗菌素等对其产量的影响。脂多糖含量的测定采用了乳化比浊度的方法。研究表明,此胞外脂多糖具有明显的乳化性及乳化稳定性,是一种聚合的生物乳化剂。
微生物脂多糖的产生、分离及乳化性能
邑屏,,李祖义
生物工程学报 , 1989,
Abstract: Acinetobacter sp.生长在醇类、植物油或正烷烃中能产生胞外脂多糖。探讨了此菌株产生胞外脂多糖的最佳条件,包括不同碳源.不同氨源,二价镁离子及添加抗菌素等对其产量的影响。脂多糖含量的测定采用了乳化比浊度的方法。研究表明,此胞外脂多糖具有明显的乳化性及乳化稳定性,是一种聚合的生物乳化剂。
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