贵州短角水虻一新种记述（双翅目：水虻科）

记述中国贵州短角水虻属1新种——谭氏短角水虻Odontomyia tani sp.nov.,绘制了鉴定特征图.模式标本保存在贵州省林业科学研究院标本馆.     

中国短角水虻属研究（双翅目：水虻科）

短角水虻属ＯｄｏｎｔｏｍｙｉａＭｅｉｇｅｎ为水虻科一大属,全世界已知近２１０种,中国记载过１２种。本文对中国短角水虻属作了综述性总结,记载了５新种（双斑短角水虻Ｏｄｏｎｔｏｍｙｉａｂｉｍａｃｕｌａｔａ,贵州短角水虻Ｏ．ｇｕｉｚｈｏｕｅｎｓｉｓ,中华短角水虻Ｏ．ｓｉｎｉｃａ,黑盾短角水虻Ｏ．ｕｎｉｎｉｇｒａ,杨氏短角水虻Ｏ．ｙａｎｇｉ）,同时对４已知种进行了再描述,并编制了中国已知种类的检索表。新种的模式标本存于北京农业大学昆虫标本馆。     

中国距水虻属新种记述(双翅目,水虻科)

记述我国距水虻属Allognosta 4新种,即黑端距水虻A.apicinigra sp.nov.、刘氏距水虻A.liui sp.nov.、宁夏距水虻A.ningxiana sp.nov.和雁山距水虻A.yanshana sp.nov,.模式标本保存在中国农业大学昆虫博物馆.     

中国线角水虻属四新种(双翅目,水虻科)

记述线角水虻属4新种,即离斑线角水虻N. dissitus sp.nov.,黄颜线角水虻N.faciflavus sp.nov.,黄腹线角水虻N.ventiflavus sp.nov.和新疆线角水虻N.xinjianganus sp.nov,.模式标本保存在中国农业大学昆虫博物馆.     

中国距水虻属六新种(双翅目:水虻科)

记述中国距水虻属Allognosta Meigen 6新种,即保山距水虻 A.baoshana,sp.nov.,红河距水虻A.honghensis,sp.nov.,金平距水虻A.jinpingensis,sp.nov.,单斑距水虻A singularis,sp.nov.,腾冲距水虻A.tengchongana,sp.n...     

贵州距水虻属新种记述(双翅目,水虻科)

首次报道我国贵州距水虻属Allognosta 4个种(包括3新种或亚种),即背斑距水虻A.dorsalis sp.nov.,梵净山距水虻A.fanjingshana sp.nov.,斑胸距水虻A.maculipleura Frey 和黑腿距水虻Allognosta flavofemoralis nigrifemur subsp.nov,.模式标本保存在中国农业大学昆虫博物馆.     

贵州盾刺水虻属一新种(双翅目,水虻科)

记述我国贵州盾刺水虻属1新种,即崔氏盾刺水虻Oxycera cuiae sp.nov.。模式标本保存在中国农业大学昆虫博物馆。崔氏盾刺水虻,新种Oxycera cuiae sp.nov.(图1～2)新种与分布台湾的顶盾刺水虻O.apicalis(Kertsz)近似,但翅端部一致烟灰色,足腿节黑色且末端暗黄色,腹部全黑色。正模♀,副模1♀,贵州麻阳河黄土乡920m,2007-09-28,崔育思。词源:新种以采集者崔育思姓氏命名。     

中国星水虻属三新种(双翅目:水虻科)

@@ 本文记述中国星水虻属3新种,即双斑星水虻Actina bimaculata,sp.nov.,三斑星水虻A trimaculata,sp.nov.和单斑星水虻A unimaculata,sp.nov..模式标本保存在中国农业大学昆虫博物馆.     

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.