中国汤姬蜂属一新种记述(膜翅目,姬蜂科)

记述我国汤姬蜂属Townesia Ozols1新种,陈氏汤姬蜂Townesia cheni sp.nov.,提供了新种的成虫形态描述、特征图和分布记录,并编制了汤姬蜂属已知种检索表。模式标本保存在浙江大学昆虫科学研究所寄生蜂标本室(ZJU)。     

依姬蜂属(膜翅目,姬蜂科)一新种记述

介绍了世界依姬蜂属已知的种类及其分布,记述了采自江西全南的依姬蜂属1新种,斑依姬蜂Ishigakia maculata sp.nov,.模式标本保存在国家林业局森林病虫害防治总站.     

霸姬蜂属(膜翅目,姬蜂科)一新种

报道采自宁夏六盘山的霸姬蜂属 Barytarbes Forster,1869 1新种,褐霸姬蜂 Barytarbes fulvus Sgebg ＆ Schonitzer,sp.nov..     

脊唇姬蜂属一新种：膜翅目：姬蜂科

本文记述姬蜂科犁姬蜂亚科脊唇姬蜂属一新种,正模、副模,采自海南省。     

针尾姬蜂属(膜翅目,姬蜂科)及一新种记述

报道在我国发现的针尾姬蜂属Pion Schiφdte,1839的种类:沁源针尾姬蜂P.qinyuanensis Chen,Shenget Miao,1998,宜丰针尾姬蜂,新种P.yifengensis sp.nov.。指出了新种与近似种的鉴别特征并附彩色特征图。     

凿姬蜂属一新种(膜翅目,姬蜂科)

报道在北京发现的凿姬蜂属Xorides Latreille,1809 1新种:黑斑凿姬蜂,新种Xoride(Xoride)nigrimaculatus sp.nov.,指出了与近似种的鉴别特征.     

中国的耕姬蜂属(膜翅目,姬蜂科)及一新种

记述采自河南省宝天曼自然保护区的耕姬蜂属Arotes Gravenhorst,1829的新种,斑耕姬蜂Arotes moculatus sp.nov.和采自辽宁及吉林的1已知种:白带耕姬蜂A.albicinctus albicinctus Gravenhorst,1829.编制了耕姬蜂属中国已知种检索表.     

新疆蚜蝇姬蜂属三新种记述：膜翅目：姬蜂科：蚜蝇姬蜂亚科

新疆蚜蝇姬蜂属三新种记述（膜翅目：姬蜂科：蚜蝇姬蜂亚科）马祁,王登元,王锁牢新疆农科院植物保护研究所新疆乌鲁木齐市８３００００新疆八一农学院植物保护系新疆乌鲁木齐市８３００５２关键词膜翅目,姬蜂科,蚜蝇姬蜂属,新种,中国本文记述了蚜蝇姬蜂属ＤＩ’ｐｌ...     

中国双洼姬蜂属(膜翅目,姬蜂科)及一新种

报道发现于江西省的姬蜂科1新种:斑颜双洼姬蜂,新种Arthula maculifacialis sp.nov..指出了与近似种的主要区别特征,编制了我国已知种检索表.     

中国姬蜂科(膜翅目)二新种(英文)

本文报道采自河南省伏牛山区的姬蜂科Ichneumonidae二新种 :暗足大食姬蜂ZabrachypusatripedalisSheng ,sp .nov .和斑三钩姬蜂TriancyramaculataSheng ,sp .nov .各新种分别与其近似种作了比较。标本保存在国家林业局森林病虫害防治总站     

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.