人补体C4的RFLP与HLA分型之间关系的探讨

应用Ｓｏｕｔｈｅｒｎ印迹杂交法、高压琼脂糖凝胶电泳和标准的微量淋巴细胞毒试验对中国汉族人４４例正常无相关个体进行了Ｃ４基因限制性片段长度多态性（ＲＦＬＰ）、Ｃ４蛋白分型及ＨＬＡ－ＤＲ分型的测定，结果发现Ｃ４ＲＦＬＰ Ａ、Ｂ二种格局在Ｃ４Ｂ＊Ｑ０的表现型上有显著差异（Ｐ〈０．０５）；ＲＦＬＰ Ａ型格局与ＤＲ４相关（Ｐ〈０．０５）。     

sICAM-1在牙周炎患者龈沟液中的含量

研究了牙周炎患者龈沟液可溶性细胞间粘附分子（ｓ Ｉ Ｃ Ａ Ｍ １）的含量⒚牙周炎患者 ２３ 例,４６ 个牙齿;正常对照２０ 例,２０ 个牙齿,用 Ｅ Ｌ Ｉ Ｓ Ａ 法检测牙周炎患者龈沟液ｓ Ｉ Ｃ Ａ Ｍ １ 的含量⒚正常对照龈沟液ｓ Ｉ Ｃ Ａ Ｍ １ 含量为（１４５．０１４±４３．７４５）ｎｇ／ｍ Ｌ ,男女间无显著性差异（ Ｐ＞ ０．０５）⒚牙周炎患者龈沟液ｓ Ｉ Ｃ Ａ Ｍ １ 的含量为（２５．３８９±８．４６１）ｎｇ／ｍ Ｌ,明显低于正常对照（ Ｐ＜ ０．０１）;一个牙齿３０ 秒龈沟液 ｓ Ｉ Ｃ Ａ Ｍ １ 总量,正常对照为（０．１７６４±０．０４３２）ｎｇ,牙周炎患者为（０．０８３０±０．０１９７）ｎｇ,二者之间有显著性差异（ Ｐ＜ ０．０１）⒚表明龈沟液ｓ Ｉ Ｃ Ａ Ｍ １ 含量的降低与牙周炎有关⒚     

解磷注射液治疗急性有机磷农药中毒的疗效观察

急性有机磷农药中毒（ＡＯＩＰ）病人１６１例，根据入院时病情分三组：Ａ）经典大剂量阿托品组（ＨＤＡＴ）；Ｂ）解磷注射液（简称解磷针）组；Ｃ）解磷加小剂量阿托品组。抢救成功率、轻度三组均为１００％；中度三组分别为９５．５％、９５％、１００％，Ｐ〉０．０５，但ＡＢ二组各死亡１例，原因分别为阿托品过量与不足；重度三组分别为７８．２％、６０．８％、９１．７％，三组比较Ｐ〈０．０５，说明解磷针可单独应用于轻度     

80例非胰岛素依赖性糖尿病患者前臂尺,桡骨骨密度分析

用单光子吸收法（ＳＰＡ）对杭州市汉族５０岁以上的８０例非胰岛素依赖性糖尿病（ＮＩＤＤＭ）患者和年龄、性别与ＮＩＤＤＭ患者相配对的４３１名正常人的前臂尺、桡骨骨密度（ＢＭＤ）进行测定，发现女性轻中型和重型组、男性重型组ＮＩＤＤＩＭ患者的尺桡骨平均ＢＭＤ显著地低于正常人（Ｐ＜０．０１）；本组ＮＩＤＤＭ患者（男女合计）的一般性骨质疏松症（ＧＯＰ）和进行性骨质疏松症（ＰＯＰ）的发病率分别为６３．７５％和８．７５％，与正常人组相比较差异非常显著（Ｐ＜０．０１）；不同病程ＮＩＤＤＭ患者组别间尺桡骨平均ＢＭＤ的差异不显著（Ｐ＞０．０５），提示ＮＩＤＤＭ的病程与ＢＭＤ的相关程度不密切。     

急性脑血管意外30例脑电地形图与脑电图,CT对比分析

用脑电地形图（ＢＥＡＭ）技术观察了３０例急性脑血管意外患者．并同时进行了脑电图（ＥＥＧ）检查，其中２３例作了ＣＴ扫描．结果表明，ＢＥＡＭ对急性脑血管意外的阳性率、定侧率与ＥＥＧ比较均有显著差异（Ｐ＜０．０５）；与ＣＴ比较总阳性率无明显差异（Ｐ＞０．０５）；但三无内检查阳性率有显著差异（Ｐ＜０．０５）．     

ASYMPTOTIC EFFICIENCY IN A PARTLY LINEAR REGRESSION MODEL

ＡＳＹＭＰＴＯＴＩＣＥＦＦＩＣＩＥＮＣＹＩＮＡＰＡＲＴＬＹＬＩＮＥＡＲＲＥＧＲＥＳＳＩＯＮＭＯＤＥＬＬｉａｎｇＨｕａ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｂｅｉｊｉｎｇ１０００８０，Ｐ．Ｒ．Ｃｈｉｎａ）Ａ...     

黄芩甙的极谱研究

用单扫示波极谱法研究了黄芩甙的电化学特性．在０．０５ｍｏｌ／Ｌ柠檬酸钠＋０．２ｍｏｌ／ＬＨＣｌ底液中,黄芩甙于－１．１６Ｖ（Ｐ１）和－１．３４Ｖ（Ｐ２）（ｖｓ．ＳＣＥ）处产生两个二阶导数峰,前者为黄芩甙分子的还原波,后者为其一价阴离子的还原波,均为羰基的双电子还原波．利用峰Ｐ１可测定黄芩甙,线性范围为０．１６～０．６４ｍｇ／Ｌ和０．７２～２４ｍｇ／Ｌ,检测限为０．０８ｍｇ／Ｌ．将该法用于中药黄芩中黄芩甙的测定时,获得满意结果     

Iodogen法碘化标记单克隆抗体通用技术研究

报道了Ｉｏｄｏｇｅｎ法碘化标记单克隆抗体（单抗）的最佳条件和对标记单抗免疫活性影响的实验结果，结果表明，当Ｉｏｄｏｇｅｎ：ＭｃＡｂ＝１：４缓冲液ｐＨ＝７．４，旋涡搅拌１０ｍｉｎ时，标记率、放化纯和峰值百分率均较高，标记单抗的免疫活性与标记前比较没有统计学差异（Ｐ＞０．０５）。￣１３１Ｉ－ＨＣＭ８３和￣１２５Ｉ－ＶＣＭＣ与阳性对照结合率为３８．２％和３０．１％，Ｐ／Ｎ为９．１和３０．１。此通用技术具有推广应用价值。     

β修正──丁基罗丹明B－OP新光度法测定工业废水中砷含量

在酸性溶液中，砷（Ａｓ￣（５＋））与丁基罗丹明Ｂ（ＢＲＢ）反应，显色液由红色变紫色，非离子表面活性剂ＯＰ能提高分析灵敏度并增大ＢＲＢ及其与砷络合产物溶解性。本文研究β修正光度法测定工业废水中痕量砷，它能消除过量ＢＲＢ的干扰提高分析灵敏度、精密度和准确度。结果表明砷浓度０～０．４０ｍｇ／Ｌ时，修正吸光度有良好线性关系，检出限０．００４ｍｇ／Ｌ，加标回收率９３．０％～１１１％，相对标准偏差ＲＳＤ≤６．５％。该方法适合于化工废水、城市污水及各种环境水质分析。     

烧伤病人血栓素B2和前列腺素的动态变化

对３８例不同程度烧伤损伤和２０例正常人的血浆ＴＸＢ２、６－ＫＰＧＦ１α进行了测定。结果显示,烧伤组ＴＸＢ２含量及ＴＸＢ２／６－ＫＰＧＦ１α比值高于对照组（Ｐ〈０．０１）,尤其以烧伤早期、吸入性损伤、电烧伤患者ＴＸＢ２升高更为明显（Ｐ〈０．００１）。提示ＴＸＢ２含量变化与微循环障碍有关,是引起血管收缩和血栓形成进行性组织坏死的原因。     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

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.     

Cooler temperatures inductive to locust outbreaks

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.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

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.     

Low doses of a red wine ingredient figh diabetes in mice

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.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

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.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

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.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

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.     

Prevalence of soft neurological signs in Chinese people

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.     

Molecular motor assembly of a biomimetic system

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.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<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