麦克卢汉的“三位一体”——理解麦克卢汉的一条别样路径

影响和支撑麦克卢汉思想的三个关键因素是:天主教、艺术和技术。在麦克卢汉看来,这三者都是人的延伸,都是“媒介“,因而又都合成一体,形成了麦克卢汉思想架构之中一个几乎完美的“三位一体“。这“三位一体“造就了作为思想家和预言家的麦克卢汉,也成为我们理解他的一条特殊路径

试论大众传播与人际传播的区别和融合

大众传播和人际传播是人类传播两种主要的传播方式。规模化和小范围、公开性和私密性是这两种传播方式的主要区别。这种区别也构成两对内在矛盾推动着两种传播方式不断融合

Advertising:Dancing in the Creation and Ethics

本文对广告中的创意、伦理及如何兼顾两者的关系进行了分析。The paper analyzes the creation,ethics and their relations in advertising

信息港建设与信息服务的辩证关系

信息港建设与信息服务是相互影响、相互促进的辩证关系。丰富的网上信息、四通八达的网络、直观快速的检索、传递和反馈机制、功能改进的有线电视网和方便快捷的电子商务功能为信息服务发展拓新提供了有利条件 ;另一方面 ,信息服务也对信息港建设起推动、促进或制约作

化工基础教学中学生工程观念的培养初探

结合自己在教学中如何培养学生工程观念的若干体会,探讨如何在具体事例中引导学生分析和解决工程问题。以提高学生学习本课程的积极性,最终掌握化工基础的基本内容

Preparation of Chitosan Magnetic Microspheres

用共沉淀法制备Fe3O4磁性纳米粒子,并对其用油酸进行表面改性,继而采用沉淀聚合法制备壳聚糖磁性微球。考察了沉淀剂浓度、乳化剂种类、Fe3O4的改性等条件对制备微球的影响。应用扫描电镜、红外谱图、接触角仪、粒径分析仪及磁铁吸附对壳聚糖磁性微球的形态与特性进行了表征。研究结果表明,在适宜的沉淀剂浓度、复合乳化剂、Fe3O4经油酸改性等条件下,可以制得平均粒径为150 nm、单分散性好且磁性明显的壳聚糖磁性微球。The Fe3O4 nanoparticles were prepared by co-precipitation method and modified by oleic acid.Chitosan magnetic microspheres were then prepared by precipitation polymerization method.The results demonstrated that the concentration of the precipitant,the type of emulsion and the modification of the iron oxide were the most effective parameters for the preparation of the microspheres.The SEM,IR and DLS results indicated that the diameter of the microspheres was about 150nm and the microspheres were uniformly distributed.The magnetic test showed the microspheres were magnetic sensitive.国家自然科学基金(50573063);; 教育部新世纪优秀人才计划项目;; 高等学校博士点专项基金(2005038401);; 厦门大学人才基金(0000X071C1

Production and consumption of dimethyl sulfur compounds by three typical algae

采用抑制剂加入法估算了中肋骨条藻、棕囊藻和东海原甲藻在不同生长期内二甲基硫化物的产生与消耗速率.结果表明:颗粒态二甲基巯基丙酸(DMSPp)和颗粒态二甲亚砜(DMSOp)在3种藻类的不同生长期内均为净消耗,溶解态二甲基巯基丙酸(DMSPd)和溶解态二甲亚砜(DMSOd)的含量受藻类产生与细菌病毒消耗控制,在藻类不同生长期内存在不同的产生与消耗速率,而二甲基硫(DMS)在3种藻不同生长期内均为净产生.同一种藻在不同生长期内以及不同藻在相同生长期内二甲基硫化物的产生与消耗速率均存在较大差异,表明藻类的生理状态和种间差异均对二甲基硫化物的产生与消耗速率产生影响.By the method of inhibitor amendment, this paper estimated the production and consumption of dimethyl sulfur compounds by Skeletonema costatum, Phaeocystis sp. and Prorocentrum donghaiense in their different growth phases. The results indicated that throughout the whole growth period of the three algae, particle dimethylsulfoniopropionate (DMSPp) and dimethylsulfoxide (DMSOp) were net consumed. The concentrations of dissolved dimethylsulfoniopropionate (DMSPd) and dimethylsulfoxide (DMSOd) were mainly affected by the processes of algal production and bacterial and virus consumption, and thus, could reflect their production or consumption rates in the growth period of algae. Dimethylsulfide (DMS) was net produced in the whole growth period of the algae. There was a greater difference in the production and consumption of dimethyl sulfur compounds for the same alga in its different growth phases and for different algae in the same growth phase, indicating that both the physiology and the inter-species difference of algae had effects on the production and consumption of dimethyl sulfur compounds.国家自然科学基金资助项目(200077022

酶抗体应用实现热启动PCR

通过制备酶抗体,形成抗原抗体复合物,使得酶在较高的温度95℃,1min,得以释放发挥聚合活性,实现热启动PCR.建立的热启动PCR体系灵敏度高,可以检测到1个拷贝的DNA分子,较普通PCR体系提高了3个数量级,并且具有较好的线性关系.这种通过形成抗原抗体复合物达到热启动PCR目的的方法的建立,具有着重要的意义,是提高PCR灵敏度和特异性的重要方法之一