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.     

中国的克里姬蜂及一新种记述 (膜翅目：姬蜂科)

 列出了克里姬蜂属Kristotomus Mason 中国已知种名录。记述了采自河南省栾川县 伏牛山的本属1新种申氏克里姬蜂K. sheni Sheng, sp. Nov,列出了与其近似种的 鉴别特征。     

长臀姬蜂属一新种(膜翅目,姬蜂科)

报道分布于中国的长臀姬蜂属Coleocentrus Gravenhorst,1829种类,其中含1新种:褐长臀姬蜂Coleocentrus fulvus sp.nov..描述了新种的形态特征,并与近似种做了比较,编制了中国已知种检索表.标本保存在国家林业局森林病虫害防治总站.     

裂臀姬蜂属(膜翅目,姬蜂科)一新种并附中国已知种检索表

报道中国的裂臀姬蜂属Schizopyga Gravenhorst,1829及采自江西省的该属1新种,全南裂臀姬蜂Schizopyga(Schizopyga) quannanica sp.nov.,记述新种的主要形态特征,指出与近似种的主要区别并附彩色特征图。编制该属我国已知种检索表。     

短颚姬蜂属和棒角姬蜂属在中国首次发现并记述一新种(膜翅目,姬蜂科)

报道发现于我国的两个新纪录属,短颚姬蜂属Skiapus Morley,1917和棒角姬蜂属Hellwigia Gravenhorst,1823的种类:黑短颚姬蜂Skiapus niger Sheng,sp.nov.和暗棒角姬蜂Hellwigia obscura Gravenhorst,1823.编制了这2属的分种检索表.     

寄生灰斑古毒蛾的姬蜂(膜翅目,姬蜂科)及一新种记述

报道采集自宁夏和内蒙古、寄生灰斑古毒蛾Orgyia ericae Germar的4种姬蜂:地蚕大铗姬蜂Eutanyacra picta(Schrank)、舞毒蛾黑瘤姬蜂Pimpla disparis Viereck、寡埃姬蜂Itoplectis viduata(Gravenhorst)、古毒蛾歧腹姬蜂Dichrogaster orgyiae Sheng,sp.nov.。介绍了新种和近似种及我国已知种的主要区别特征并附彩色特征图。     

新疆坐腹姬蜂属Enizemum一新种记述：（膜翅目：姬蜂科：蚜蝇姬蜂亚科）

坐腹姬蜂属Enizemun Foerster,1869,隶属于膜翅目姬蜂科蚜蝇姬蜂亚科,其主要特征为:中胸背板无盾纵沟;并胸腹节基区多少平坦;前翅通常有小翅室;腹柄节长宽几乎相等,背板有1对脊由基部伸达后缘;第2腹节背板基部有1对脊,第4腹节通常基部有折缘缝;雄虫触角中间鞭节有角下瘤。该属世界已报道约15种,中国记载2种:E.ornatum Gravenhorst,1829和E.formosense Uchida,1957。我们在整理标本时,发现该属1新种,现记述如下:     

松阿扁叶蜂寄生性天敌一新记录种(膜翅目:姬蜂科:栉足姬蜂亚科)

记述寄生于松阿扁叶蜂Acantholyda posticalis Matsumura幼虫的姬蜂科1新记录种:亮栉姬蜂Ctenopelma luciferum(Gravenhorst),对其分类地位、形态特征、分布及寄主进行了记述,并对该姬蜂的生物学进行了初步的研究.     

中国的克里姬蜂及一新种记述 (膜翅目：姬蜂科)

列出了克里姬蜂属Kristotomus Mason 中国已知种名录。记述了采自河南省栾川县伏牛山的本属1新种申氏克里姬蜂Ksheni Sheng, sp. Nov,列出了与其近似种的鉴别特征。     

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..     

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.