中国叉齿细蜂属环柄细蜂种团两新种记述(膜翅目,细蜂科)

记述了我国细蜂科叉齿细蜂属Exallonyx 叉齿细蜂亚属Exallonyx的环柄细蜂种团cingulatus-group 2新种:强脊叉齿细蜂Exallonyx firmus sp.nov.和无凹叉齿细蜂Exallonyx exfoveatus sp.nov..描述了其形态特征并与近似种做了比较.模式标本存于浙江大学寄生蜂标本室.     

中国脊额细蜂属分类研究(膜翅目,细蜂科)(英文)

记述了我国脊额细蜂属6种,其中2新种:卜氏脊额细蜂P.buisp.nov.和黑胫脊额细蜂P.nigritibialis sp.nov.;2新纪录种:冠脊额细蜂P.cristatus Townes et Townes和点柄脊额细蜂P.punctibasis Townes et Townes;新种和新纪录种均附有详细特征图,并编制了我国脊额细蜂属分种检索表。模式标本保存于浙江大学膜翅目寄生蜂标本馆(ZJUH)。     

中国新纪录属——缺脉锤角细蜂属记述(膜翅目,锤角细蜂科)

记述了我国锤角细蜂科1新纪录属缺脉锤角细蜂属Aneuropria Kieffer,1905及1新纪录种凯氏缺脉锤角细蜂Aneuropria kairali Rajmohana et Narendran,2000,描述了成虫的形态特征并提供了特征图,记述了地理分布.研究标本保存在华南农业大学膜翅目标本室.     

窄腹细蜂属二新种(膜翅目:窄腹细蜂科)

报遭窄腹细蜂属Ropronia Provancher 2 新种：梵净山窄腹细蜂R．fanjingshanensis He et Chen．sp．nov．和双斑窄腹细蜂R．bimaculata He et Chen,sp．nov。均采自贵州省。描述了形态特征并与近似种做了比较。模式标本保存于杭州浙江大学植物保护系寄生蜂标本室。     

中国细蜂族一新属一新种(膜翅目:细蜂科)

细蜂科Serphidae的细蜂族Serphini主要特征为:盾纵沟缺或不明显仅由一浅洼痕显出;腹部通常具柄(除无翅细蜂属Paracodrus);上颚常具1齿(中沟细蜂属Parthenocodrus具2齿);后胸侧板前方的无刻皱区通常小于侧板的0.35倍;前翅长约为宽的3.0倍,翅有时退化为短翅型或缺如;第一盘室和第二盘室愈合,但肿额细蜂属Codrus有时例外;并胸腹节背表面中等长至长。该族已记载有7个属,我国已知有5个属,但有1属没有种的报道。据记载大多种类寄生于甲虫幼虫,特别是隐翅虫科Staphilinidae、步甲科Carabidae和叩甲科Elateridae;还有1种曾从蜈蚣Lithobius中养出。     

中国中沟细蜂属一新种记述(膜翅目,细蜂科)

记录我国中沟细蜂属Parthenocodrus 1新种:康定中沟细蜂P.kangdingensis sp. nov.(四川).描述了其形态特征并与近似种做了比较.模式标本存浙江大学寄生蜂标本室.     

中国叉齿细蜂属网腰细蜂种团二新种记述(膜翅目:细蜂科)

记录我国叉齿细蜂属Exallonyx叉齿细蜂亚属Exallonyx网腰细蜂种团dictyotus-group2新种:采自陕西和浙江的黑唇叉齿细蜂Exallonyxnigrolabius,sp.nov.和采自贵州的短脊叉齿细蜂Exallonyxbrevicarinus,sp.nov.。模式标本保存于浙江大学寄生蜂标本室。     

中国短细蜂属种类记述(膜翅目:细蜂科)

记述中国短细蜂属Brachyserphus Hellén 5种,其中包括4新种:周氏短细蜂Brachyserphus choui He et Xu,sp.nov.、天目山短细蜂Brachyserphus tianmushanensis He et Xu,sp.nov.、贵州短细蜂Brachyserphus guizho...     

中国锤角细蜂亚科一新记录属及一新种记述（膜翅目：锤角细蜂科）

首次记述锤角细蜂亚科Diapriinae 1中国新记录属--长痣锤角细蜂属Entojmacis Foerster,1856,并记述该属1新种:巾华长痣锤角细蜂 Entomacissinensis,sp,nov..模式标本保存于华南农业大学昆虫标本室.     

细蜂亚科一新属一新种(膜翅目:细蜂科)

本文记述在我国河南省伏牛山发现的细蜂科Proctotrupidae细蜂亚科Proctotrupinae 1新属新种:中华强脊细蜂Carinaserphus sinensis gen. et sp. nov.。描述了其形态特征并与近似属做了比较。模式标本存浙江大学寄生蜂标本室。     

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.