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《中国科学院院刊(英文版)》2006,20(4):207-207
The outbreak of the severe acute respiratory syndrome (SARS) in 2002 caused alarm acr oss t he wor ld. A coronavirus in humans, called SARS-CoV, has been identified as the causative agent for this killer disease. It is discovered to have a large single-po… 相似文献
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A healthy human body is equipped with a powerful immune system for resisting the attack of invading microorganisms. Unfortunately the system sometimes goes awry attacks the body itself.Autoimmunity is the failure of an organism to recognize its own constituent parts as"self " resulting in an immune response against its own cells tissues. A disorder that results from such an aberrant immune response is termed an autoimmune disease.…… 《中国科学院院刊(英文版)》2007,21(4):206
A healthy human body is equipped with a powerful immune system for resisting the attack of invading microorganisms. Unfortunately, the system sometimes goes awry and attacks the body itself.Autoimmunity is the failure of an organism to recognize its own constituent parts as"self," resulting in an immune response against its own cells and tissues. A disorder that results from such an aberrant immune response is termed an autoimmune disease. 相似文献
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Marketers increasingly use social media platforms as a promotion channel, and doing this, they prefer highly interactive social media because it allows consumers to socialize and network better. However, in this media, attention is often restricted towards primary purpose only as a result of the level of interactivity, thereby affecting consumer response towards the advertisement(ad). In this setting, the study analyzes the role of media interactivity and the effects it has on the reaction of customers towards the social media ad. Further, the study also introduces the conditional role of message relevant aspects, such as message vividness and anthropomorphism, and examines the intervening role of flow experience. Results from a between-subjects study indicate that interactivity hurts the consumer ad reactions. It also suggests that the right use of message relevant aspects can mitigate these adverse effects. Thus, the study makes a significant contribution to the literature and practice regarding the effects of social media interactivity which is relatively recent and has been overlooked by past researchers. 相似文献
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Teamning up with co-workers from Japan UK US CAS biochemists have revealed a novel mechanism for maintaining neural stem cells in early embryos. Their work was published on the August issue of Cell Development.…… 《中国科学院院刊(英文版)》2007,21(4):214-214
Teamning up with co-workers from Japan, UK and US,CAS biochemists have revealed a novel mechanism for maintaining neural stem cells in early embryos. Their work was published on the 6 August issue of Cell Development. 相似文献
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当代创业企业:创新知识的综合定价机制 总被引:3,自引:0,他引:3
本文认为,创新知识是创业企业诞生的起始点,是理解创业企业的关键。基于自身的特性,创新知识无法直接经由一次性的市场交易来给予定价。创新知识所有者是通过创办企业,以拥有创业企业所有权的形式来实现收益的。因此,当代创业企业在本质上是一种创新知识的综合定价机制。 相似文献
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我国许多地方通过产业集群提高了产业竞争优势,拉动了地方经济的增长。产业集群拥有强大的知识创新能力,因此研究产业集群知识创新机制对于提高产业竞争力和促进区域经济的发展具有重要的理论意义和现实意义。文章借助仿生学原理,运用知识发酵理论阐述了产业集群知识创新SEC I过程各要素构成,弥补了当前有关知识创新理论的不足,为产业集群知识创新提供了一种新的思路和理论框架。 相似文献
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对权证到期时对标的股票成交量、股价及超常收益率进行了实证分析。分析结果表明:认股权证在行权时标的股票成交量有所放大,但股票价格并没有波动;在股票市场这一轮牛市的作用下,认沽权证到期时都属于价外权证,没有行权可能,因此,对标的股票价格及成交量不产生影响。 相似文献
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W.E. Ruder 《Journal of The Franklin Institute》1919,187(5):635-636
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从分析以工艺创新为基础的工艺创新和产品创新的交互作用出发,讨论了工艺创新的扩散机制。认为工艺创新的扩散分为内部扩散和外部扩散两种形式,前者是指由一项工艺创新,以产品为中介,引发出一系列新的工艺创新,后者是指一项成功的工艺创新可以导致一系列新产品的开发成功。通过对哈尔滨工业大学无模液压胀形工艺技术开发这一典型案例,进一步讨论了这一扩散机制。 相似文献
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植物响应干旱的生理机制研究进展 总被引:1,自引:0,他引:1
干旱是植物面临最主要的环境胁迫,植物长期在干旱环境下生存,形成了一系列抵御干旱逆境的生理机制。研究植物响应干旱的生理机制是当前抗旱研究中的热点。文章综述了植物适应干旱的类型,气孔调节、代谢调节、渗透调节、干旱信号传递等适应干旱的生理机制,并分析了其发展趋势。 相似文献
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农业、农村、农民(三农)问题是全面建设小康社会的核心问题,本文介绍了国外在农业产业化中的经验和做法,并就农业的产业化地位、我国农业产业化如何建立核心机制等进行了探讨。 相似文献
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虽然有大量关于产品创新与实现产品创新的组织的研究,但是,有关产品创新与组织之间的对应关系的研究,特别是针对不同创新类型所进行的组织内部的相互作用机制的研究则是极为罕见的.本研究是在对产品创新进行系统分类的基础上,对在不同类型创新下组织内不同层面和不同部门间的相互作用关系进行研究.该研究有助于企业组织的产品创新活动的开展. 相似文献