共查询到20条相似文献，搜索用时 119 毫秒
1.
卡托普利（Captopril)是血管紧张素转换酶抑制剂（Angiotensin-Converting enzyme inhibitor ACEI)中应用最广泛的临床降压药物。除了用于治疗各种类型高血压外,在糖尿病性肾病、肾小球肾炎、心力衰竭、心肌梗塞及肺心病等病症中也得以应用。卡托普利作为一种降压药,通过抑制肾素－血管紧张素转换酶系统,在多系统多病种的血管病变中发挥作用。在发挥其广泛而有效的临床疗效的同时,也引发了诸如呼吸系统病变、低血糖、低血压等临床副作用。 相似文献
2.
高血压老年患者大多合并多种疾病,存在多种药物合用,达到降压目标依然面临着挑战,因此老年高血压的药物治疗一直是研究的热点.阿利吉仑是首个上市的口服直接肾素抑制剂,可直接降低肾素的活性,作用于肾素-血管紧张素系统.阿利吉仑作为抗高血压药物,起效快,降压效果确切,具有心血管和肾脏的保护作用.文章综合国内外文献,探讨阿利吉仑药... 相似文献
3.
4.
5.
急性高原肺水肿是在高原低氧环境条件下神经，内分泌递质异常分泌，肾素－血管紧素－醛固酮的激活，缩血管物质的释放及交感神经兴奋的作用，使水盐代谢失衡，血液动力学改变血管阻力及肺毛细血管楔嵌压，减轻水肿，可拮抗血管紧张素转换酶，降低周围血管阻力及肺毛细血管楔嵌压，减轻肺瘀血，本文应用ACEI－卡托普利治疗急性高原肺水肿36例，对照组显效46．3％，有效53．7％，治疗组与对照组比较显效率P＜0．05，治疗组临床效果较好，平均比对照组提高康复2－3天，缩短病程，卡托普利治疗急性高原肺水肿是安全有益的，适应于血压正常或偏高者，心率正常或偏快者，肺瘀血或浮肿者，用卡托普利开始剂量12.5mg,逐渐增加量，需加用少量利尿剂。 相似文献
6.
血管紧张素转化酶基因I/D多态性与高血压脑梗塞发病的相关性 总被引：2，自引：0，他引：2
采用PCR方法分别检测82例高血压合并脑梗塞患者(BI)、67例单纯高血压患者(EH)和95例健康对照者(C)的血管紧张素转化酶(ACE)基因I/D多态性类型,并分析ACE基因I/D多态性分布与高血压合并脑梗塞发病的相关性.结果显示,BI组ACE基因的D/D基因型频率和D等位基因频率(分别为0.341和0.524)显著高于C组(分别为0.200和0.374,P<0.05)和EH组(分别为0.179和0.358,P<0.05),而EH组和C组ACE基因的D/D基因型频率和D等位基因频率无显著性差异.该研究结果表明,ACE基因的D/D基因型可能是高血压合并脑梗塞发病的独立危险因素. 相似文献
7.
计算机辅助全新药物分子设计的研究 总被引：1，自引：0，他引：1
随着计算机技术的飞速发展以及大量与疾病相关的基因和蛋白质分子的三维结构被测定,计算机辅助药物设计已成为当今各大制药公司开发新药的重要方法。本文对计算机辅助全新药物分子设计的理论及方法进行了一定研究,并设计出了一种全新的血管紧张素转换酶抑制剂分子。该分子与血管紧张素转换酶的亲和性好,生物利用度较高,为开发高活性的降压药物提供了线索。 相似文献
8.
血管紧张素转换酶抑制剂可抑制神经体液因素的激活，神经体液因素激活与高原病的发病机理密切 相关。我们应用ＡＣＥＩ治疗高的病，与以往临床用６５４－２组及对照组进行直接对比，观察临床疗效，用ＡＡＣＥＩ治疗３２例，用６５４－２治疗２８例，对照组２２例。 相似文献
9.
10.
11.
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
12.
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
13.
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
14.
《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
15.
《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
16.
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
17.
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
18.
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
19.
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
20.
《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