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本文对当前转基因检测中遇到的常见问题进行阐述,包括转基因检测的方法,转基因检测方法的应用,转基因检测方法中内参基因的作用,转基因检测中外源基因的主要元件,转基因检测的假阳性与假阴性,防止转基因检测造成的污染及转基因检测中的引物,共七个方面,以期为转基因检测工作者提供初级学习资料。 相似文献
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转基因食品安全性分析及其政策完善环节 总被引：1，自引：0，他引：1
针对各种对待转基因食品的态度,本文从育种方法、食用原理、伦理和实证方面对转基因食品安全性进行了分析;从政策基点、政策过程、政策方针以及政策参与等环节对我国转基因食品开发政策完善提出了建议。 相似文献
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研究选取我国东部、中部、西部3个城市的216名消费者,运用实验经济学的方法得到数据,并通过计量模型分析不同转基因食品政策下消费者对转基因食品和非转基因食品支付意愿差异。得出结论,相对于无信息政策,有信息时,消费者对转基因食品支付意愿更小;相对于自愿标识政策,强制标识政策下,消费者对非转基因食品支付意愿更大。 相似文献
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目的:了解卫生职业学院学生对转基因食品的认知状况。方法经整群抽样确定研究对象,采用统一的调查表进行转基因食品知识、态度和行为的现状调查。结果学生对转基因食品的知晓率为45.10%;转基因食品知识的主要来源为电视广播(60.78%)、课本书籍(52.94%)、网络(49.02%)和报刊杂志(37.25%);43.75%的学生支持发展转基因食品,但73.47%的学生表示不愿意购买;62.75%的学生并不了解我国的转基因食品管理制度,80.39%的学生赞同进行对转基因食品进行标识。结论:卫生职业院校学生对转基因食品的认知程度较高,但购买意愿低,且大学生对我国转基因食品管理制度不了解。 相似文献
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植物转基因技术的研究和应用 总被引：1，自引：0，他引：1
介绍了植物转基因技术的研究方法和发展现状,综述了转基因植物在农业、医疗卫生和环境保护等领域的应用,分析了研究过程中出现的难题,并对植物转基因技术的发展前景做了展望. 相似文献
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转基因香石竹的培育是摆脱香石竹枯萎病的主要途径之一。为检验转基因香石竹各品系对尖孢镰刀菌的抗性,筛选出转基因香石竹的高抗品系。实验采用组培苗无伤接种和离体苗伤口接种,对转基因香石竹的28个品系进行了抗枯萎病鉴定。鉴定结果表明,转基因苗普遍比普通非转基因苗抗性有较大幅度提高。转基因组培苗中,Tuareg52、Ciao Bianco416、Asso101 3个品系,在2次测定中都表现出很高的抗性。可以在生产中推广应用。该研究不仅为植物抗病性测定提供了研究方法,也为转基因香石竹抗枯萎病品系的选育提供依据。 相似文献
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“实质等同性”原则与“转基因食品”的安全性 总被引：3，自引：0，他引：3
21世纪是生物技术的世纪。转基因食品作为转基因技术的产物,其安全性评价引起人们的高度重视。"实质等同性"原则评价转基因食品的安全性合理吗?为此,我们需要对评价转基因食品安全性的"实质等同性"原则进行分析和探讨,并从哲学的角度进行反思,旨在探寻更加合理的方法来评价转基因食品的安全性。 相似文献
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针对2013年国内发生的“转基因大豆是否致癌争论事件”，文章以微博中的转基因技术形象为研究对象，利用新浪微博自带的高级搜索功能对2014年关于转基因技术的微博进行抽样，按照每7日抽样一次的方法抽得52日共计721个有效样本并进行内容分析，归纳微博中转基因技术内容信息及分类条目，并总结出四种转基因技术在微博中的形象：神奇的科幻魔术师、安全可靠的高科技、充满争议的科学创新以及管理不善的失信者。本研究对于探索新媒体与转基因生物技术传播之间的关系具有一定的现实意义。 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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《中国科学院院刊(英文版)》2014,(3)
<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence 相似文献