Medline(PubMed)生物化学杂志文献搜索引擎开发研究

为了方便生物化学工作快捷、准确地查阅生物化学杂志献,开发和利用NCBI的Medline数据库的生物化学杂志献资源。从Medline(PubMed)中检索并列出175种有关生物化学的杂志名录,制作了每种杂志及部分杂志年份相应的超级链接,组成一个有关生物化学杂志献的搜索引擎。此搜索引擎能快捷、准确、动态地检索175种生物化学杂志全部献题录及部分杂志各年的献题录,并可在PubMed中进一步检索出献的要和部分全。     

Medline (PubMed)遗传学杂志文献搜索引擎开发研究

为了方便遗传学工作者快捷、准确地查阅遗传学杂志文献,开发和利用NCBI 的 Medline数据库的遗传学杂志文献资源。从Medline (PubMed)中检索并列出173种有关遗传学的杂志名录,制作了每种杂志及部分杂志年份相应的超级链接,组成一个有关遗传学杂志文献的搜索引擎。此搜索引擎能快捷、准确、动态地检索173种遗传学杂志全部文献题录及部分杂志各年的文献题录,并可在PubMed中进一步检索出文献的摘要和部分全文。 Abstract：To help geneticists look up genetics journals more quickly and exactly,this paper developed this search engine of genetics journals. The paper exploited the search engine with genetics journals sources of Medline database in NCBI, indexed and listed 173 names of genetics journals from Medline. Then obtained one search engine concerning genetics journals after making every journal´s super linkage. The search engine can search out not only all articles´ titles of 173 genetics journals but also some articles’ titles of the journals each year quickly,exactly and variablely. We can further obtain all articles´ abstracts and some full texts in PubMed.     

妇产科中文文献题录检索软件编制及应用

随着计算机科学的不断发展,计算机在各个领域中得到广泛的应用,它在医院信息管理系统方面及文献检索方面的应用也逐渐为人们所知。但其在中文医学文献题录检索,尤其在妇产科中文文献题录检索方面的应用尚未见报导。我们利用计算机检索速度快,使用方便、准确的优点,将原来费力又费     

基于WWW的生物信息集成检索系统的研制

生物信息检索和获取成为当前非常重要而紧迫的研究课题,我们采用元搜索引擎技术、JAVA和HTML编程语言研制开发了基于WWW生物信息集成检索系统,该系统提供了统一的检索界面,对15分子生物学数据库和3个通用搜索引擎实现多功能、复合型、全开放的集成检索。该系统为广大从事医学、分子生物学、分子肿瘤学、分子遗传学以度人类基因组的科研人员准确、及时、综合获取多种生物信息资源,具有极为重要而深远的意义。     

从文献计量学角度评价我国干细胞产业发展历程

目的:通过分析我国有关干细胞科技论文被国际权威检索工具PubMed收录情况,评价我国干细胞领域的发展历程及应用前景。方法:应用文献计量学和数理统计方法对PubMed收录我国干细胞领域科技论文进行统计分析。结果:PubMed一共收录我国干细胞领域科技论文8039篇,其中中文文献2021篇,外文文献6018篇;北京、上海、广东、台湾四个地区发文量领先于其他地区;排名前三的发文机构为中山大学、上海交通大学和中国医学科学院北京协和医院;国际期刊分布中Biochem Biophys Res Commun、Biomaterials、PLoS One位列前三甲;国内期刊分布中中国实验血液学杂志、中国修复重建外科杂志、中华医学杂志位列前三甲;主题分布中高频主题词有间充质干细胞、骨髓细胞、造血干细胞,等;干细胞治疗疾病常见的有白血病、心肌梗死、肝肿瘤,等。结论:我国干细胞起步于1986年,于2000年后快速发展,发文量成几何倍数增长,干细胞的发展将对我国传统医疗手段和医疗观念造成一场重大的革命。     

<遗传学与分子生物学近期进展>

遗传学与分子生物学近期进展》创刊于１９８４年,现由世界著名的英国埃尔塞威尔（Ｅｌｓｅ－Ｓｉｅｒ）公司出版。它是一种题录型的检索期刊,是《生物科学近期文献通报》（ＣＡＢＳ）１２个分册之一,本刊１９９９年第３期已对ＣＡＢＳ的特点作了介绍。《遗传学与分子生...     

<细胞学与发育生物学近期进展>

《细胞学与发育生物学近期进展》创刊于 1984年 ,现由世界著名的英国埃尔塞威尔 (Ｅｌｓｅｖｉｅｒ)公司出版。它是一种题录型检索期刊 ,系《生物科学近期文献题录》(ＣＡＢＳ)的 12个分册之一 (编者注 :ＣＡＢＳ介绍 ,见本刊 1999年第 3期 )。该刊把细胞学与发育生物学分成 14个一级主题类目、5 6个二级主题类目和 117个三级主题类目。每年第一期刊载选用期刊及丛书的目录。为便于检索 ,每期都设有主题类目、期刊索引及作者索引。目前 ,该刊选用 170 0余种期刊作为文献源 ,每年报道文献量可达 172 5 0篇左右。科研人员及文献代查人员可通过…     

基于GoPubMed对埃博拉病毒研究文献的数据分析

本研究对埃博拉病毒相关研究载文量的文献计量学分析,以期为埃博拉病毒研究提供文献的数据支持。埃博拉病毒(Ebolavirus,EBOV)是撒哈拉以南的非洲地区高致病性人畜共患传染病,本文基于文献计量学的分析方法,以“Ebolavirus”为主题词检索文献,检索截止至2018年3月2日被PubMed数据库收录的埃博拉病毒(Ebolavirus)相关研究文献,在PubMed中检索到4 391篇文献为研究对象。统计学分析其埃博拉病毒相关研究文献的高频主题词及发表文献的年份、国家、城市和期刊的分布情况,了解埃博拉病毒研究的现状及其发展趋势。结果表明2013-2015年,PubMed数据库收录的埃博拉病毒相关研究的载文量呈逐年上升趋势,2015年至本文统计日的载文量呈现逐年下降。本研究在PubMed数据库检索到的4 391篇埃博拉病毒研究文献中,载文量最多的国家为美国,中国排第六,载文量较多的地区和城市则集中在北美和欧洲等西方发达国家,载文量较多的城市中,中国的北京排第八位。埃博拉病毒相关研究载文量较多的期刊是Journal of Virology(J Virol)。利用GoPubMed检索到的埃博拉病毒相关研究文献,可以从文献数据的角度显示出埃博拉病毒研究的现状和发展趋势。     

植物生理学检索期刊介绍

现代科学文献数量激增、类型复杂、语种多样、内容交叉、发表分散、更新频繁。广大科研人员在茫茫书海中迅速而准确地获取针对研究课题的资料,就应当掌握科技文献的检索手段和方法。至于植物生理学文献检索的方法问题,已有专文详述,本文仅就收录植物生理学文献的有关国内外检索期刊择要作一简介。     

碱性水对健康影响的定性循证研究

目的：系统检索国内外公开发表的有关碱性水与健康的文献，综合分析碱性水与人体健康关系。方法：检索1998年1月-2019年12月期间发表在中国生物医学文献数据库、中国知网、万方数据知识服务平台、维普资讯中文期刊服务平台、PubMed、Embase、Medline和Cochrane Library等 8个数据库发表的相关研究文献，纳入以人为研究对象的研究，排除重复、不完整、无法获得全文的文献等，语种限定为中文和英文。结果：从9 653篇文献中筛选出13篇纳入本研究的分析，其中8篇随机对照试验、1篇随机交叉试验、1篇自身前后对照试验、2篇病例对照研究、1篇回顾性队列研究。碱性水能够降低甲状旁腺激素和C肽，增强对骨吸收的抑制作用；降低血压、血糖、甘油三酯和总胆固醇；有助于反流性咽喉炎和神经源性慢性咳嗽患者的治疗；有助于肠道正常化，降低出现胃肠道症状的风险，但对肠道微生物群的组成及血糖调节没有影响；碱性水与肾结石复发有关；增强水合作用，改善酸碱平衡和无氧运动表现。结论：多数文献显示饮用碱性水对健康是有益的，但目前结论是基于少量高质量或存在混杂因素的研究获得的，缺乏高质量的科学证据支持，仍需要进一步的研究验证。     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细     

Selection with two alleles and complete dominance

For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment.