异源植物中转座因子标签研究的进展

异源植物中转座因子标签研究的进展瞿绍洪１,２）景健康１）胡含１）（１中国科学院遗传研究所,北京１００１０１;２中国科学院植物研究所,北京１０００９３）ＰｒｏｇｒｅｓｏｆＴｒａｎｓｐｏｓｏｎＴａｇｇｉｎｇｉｎＨｅｔｅｒｏｌｏｇｏｕｓＰｌａｎｔｓＱｕＳｈ...     

柴胡类药材的柴胡皂甙分析

柴胡类药材的柴胡皂甙分析李光慧罗燕燕王瑛袁昌齐王年鹤（北京临床药学研究所,北京１０００３５）（江苏省中国科学院植物研究所,南京２１００１４）ＡｎａｌｙｓｉｓｏｆｓａｉｋｏｓａｐｏｎｉｎｓｉｎｍｅｄｉｃｉｎａｌＢｕｐｌｅｕｒｕｍｓｐｐ．ＬｉＧｕａｎｇ...     

MRSA感染抗菌药物治疗

ＭＲＳＡ感染抗菌药物治疗解放军总医院北京临床药物药理研究室北京１００８５３王睿（综述）周贵民（审阅）随着抗菌药物广泛应用,细菌耐药性不断增强。近年来耐甲氧西林金黄色葡萄球菌（ｍｅｔｈｉｃｉｌｉｎ－ｒｅｓｉｓｔａｎｔｓｔａｐｈｙｌｏｃ－ｏｃｃｕｓａｕｒ...     

生态交错带与生态流

生态交错带与生态流王庆锁（中国农业科学院畜牧研究所,北京１０００９４）冯宗炜罗菊春（中国科学院生态环境中心,１０００８０）（北京林业大学,１０００８３）ＥｃｏｔｏｎｅｓａｎｄＥｃｏｌｏｇｉｃａｌＦｌｏｗｓ．ＷａｎｇＱｉｎｇｓｕｏ（ＡｎｉｍａｌＨｕｓ...     

昆虫卵黄发生研究进展

昆虫卵黄发生研究进展李乾君,龚和,管致和（中国科学院动物研究所北京１０００８０）（北京农业大学植保系北京１０００９４）昆虫卵的成熟一般分为三个时期－－卵黄发生前期（Ｐｒｅｖｉｔｅｌｌｏｇｅｎｉｃｓｔａｇｅ）、卵黄发生期（ｖｉｔｅｌｌｏｇｅｎｉｃｓｔａ...     

人Mn—SOD基因结构

人Ｍｎ┐ＳＯＤ基因结构吕星孙志贤裴雪涛吴祖泽（北京放射医学研究所,北京１００８５０）关键词锰超氧化物歧化酶基因结构超氧化物歧化酶（ｓｕｐｅｒｏｘｉｄｅｄｉｓｍｕ－ｔａｓｅ,ＳＯＤ）催化超氧阴离子自由基（Ｏ－·２）转变为Ｈ２Ｏ２和Ｏ２的歧化反应（２Ｏ－...     

非持久性病毒传播机制的研究进展

非持久性病毒传播机制的研究进展吴云峰（西北农业大学植物保护系,陕西杨陵７１２１００）周广和（中国农业科学院植物保护研究所,北京１０００９４）ＡｄｖａｎｃｅｓｉｎＴｒａｎｓｍｉｓｓｉｏｎＭｅｃｈａｎｉｓｍｏｆＮｏｎｐｅｒｓｉｓｔｅｎｔＶｉｒｕｓｅｓｂｙ...     

棉蚜田间种群特定死亡率分析

棉蚜田间种群特定死亡率分析戈峰丁岩钦（中国科学院动物研究所,北京１０００８０）ＡｎａｌｙｓｉｓｏｆｔｈｅＴｉｍｅ┐ｓｐｅｃｉｆｉｃＭｏｒｔａｌｉｔｙｏｆＣｏｔｔｏｎＡｐｈｉｄ（Ａｐｈｉｓｇｏｓｓｙｐü）Ｐｏｐｕｌａｔｉｏｎ．ＧｅＦｅｎｇ,ＤｉｎｇＹａ...     

林隙（gap）更新动态研究进展

林隙（ｇａｐ）更新动态研究进展臧润国（中国林业科学研究院生态环境研究所,北京１０００９３）ＲｅｓｅａｒｃｈＡｄｖａｎｃｅｓｏｆＧａｐＲｅｇｅｎｅｒａｔｉｏｎＤｙｎａｍｉｃｓ．ＺａｎｇＲｕｎｇｕｏ（ＩｎｓｔｉｔｕｔｅｏｆＥｃｏｌｏｇｙａｎｄＥｎｖｉｒ...     

葡萄糖淀粉酶研究进展

葡萄糖淀粉酶研究进展杨依军,李多川,沈崇尧（北京农业大学植物科技学院．北京１０００９４）葡萄糖淀粉酶（ＧｌｕｃｏａｍｖｌａｓｅＥ·Ｃ３．２．１．３）,又称淀粉葡萄糖苷酶（Ａｍｙｌｏｇｌｕｃｏｓｉｄａｓｅ）或γ－淀粉酶（γ－ａｍｙｌａｓｅ）,简称糖化酶...     

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.