共查询到20条相似文献，搜索用时 285 毫秒
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随着肿瘤药理、分子药理学研究的飞速发展,靶向抗肿瘤药物的研发已成为当今抗肿瘤药物研究开发的重要方向。靶向抗肿瘤药物有独特的靶向抗肿瘤作用,在当前临床治疗中已发挥重要作用,但仍不能完全根治恶性肿瘤。继续寻找更有效的抗肿瘤药物仍然是热点。近来,研究者们已发现Telomestatin（SOT-095）、elesdomol、PI-88及其类似物等化合物,在抗肿瘤方面显示出良好的应用前景。对此,结合大量研究结果介绍近年来靶向抗肿瘤药物的研究进展。 相似文献
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应用ＨＭＯ法对几种嘌呤类抗肿瘤药物分子进行了量子化学计算，发现嘌呤衍生物的抗肿瘤药效与某些量化指标有很好的相应关系，从而可从分子作用的角度根据计算的这些指标找出药物的活性中心及药物分子的构效关系，进而预测几个模拟嘌呤衍生物分子的抗肿瘤效果． 相似文献
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紫杉醇是一种具有独特结构和独特作用机制的抗肿瘤药物,该药是从红豆杉属植物紫杉中提取并开发利用的天然广谱抗癌新药。自1992年FDA批准上市以来,紫杉醇独特的抗肿瘤作用日益受到世界各国研究人员的重视,现已广泛应用于临床,并成为多种肿瘤的一线化疗药物。介绍了紫杉醇的抗肿瘤机制、临床应用、结构改进等研究进展情况。 相似文献
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在高通量药物筛选中 ,数学模型被认为是实现对样品库大规模筛选及筛选过程自动化的基础 .从热力学及动力学的角度对药物筛选的原理与方法进行了分析研究 ;同时也对药物与靶点的 3种可能的作用体系进行了研究 ,获得了药物筛选过程的热力学与动力学综合模型和基础数学模型 相似文献
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介绍了紫杉醇,包括作用机制、构效关系、结构修饰、药理作用与临床应用、新资源的展望及开发等来说明抗肿瘤药物的研究情况及最新进展 相似文献
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《中国科学基金》2019,(5)
国家自然科学基金重大项目"抗肿瘤药物高分子载体的多功能性和协同作用"针对当前抗肿瘤纳米药物药效提升受限的关键科学问题,设计新一代高分子药物载体,综合实现抗肿瘤纳米药物的(1)长循环、(2)肿瘤组织富集、(3)肿瘤组织渗透、(4)进入肿瘤细胞、(5)胞内药物释放,提升抗肿瘤纳米药物的总体治疗效果。经过项目组5年(2014—2018年)的努力,在高分子纳米载体结构与体内药物输送特定过程的构效关系、智能响应性高分子纳米药物载体的多功能化研究、复合组装纳米药物载体的功能协同与集成、功能协同化高分子纳米载药系统的疗效和初步安全性评价等方面取得了一系列创新性研究成果。本项目的研究对新一代抗肿瘤纳米药物的发展具有重要意义。 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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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 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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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 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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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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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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Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 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