宽颜叶蜂属分类研究（膜翅目：蕨叶蜂科）

记述宽颜叶蜂属2种,包括1新种：Alloselandria zhengi,sp．nov．,首次描述了Alloselandria indobirmana Malaise的雄虫。编制了宽颜叶蜂属分种检索表,绘制了已知2种的主要鉴别特征图,简要讨论了宽颜叶蜂属与近缘属的鉴别特征和分布特点。新种模式标本保存于中南林学院昆虫模式标本室。     

榆近脉三节叶蜂的识别及为害特点

本文记述了在北京松山发现的榆近脉三节叶蜂Aproceros leucopoda Takeuchi,这是北京榆树上一种新的食叶害虫。由于它营孤雌生殖,一年多代,并已入侵多个欧洲国家,在我国也具扩散的可能性。本文详细介绍了榆近脉三节叶蜂各虫态的形态特征(附特征图和彩色生态图)和生物学特性。     

梅叶蜂的初步研究

<正> 梅叶蜂Nematus sp.属膜翅目,叶蜂科(Tenthredinidae)、丝叶蜂亚科(Nematinae),是四川省梅产区叶片上重要害虫之一。国内对该虫尚无报道。我们于1984～1985年在四川省大邑县邮江区对该虫作了初步观察和研究,现将结果整理如下。     

双齿锤角叶蜂研究及亚洲锤角叶蜂科分属检索表

根据模式标本和新采集的标本,重新描述了齿锤角叶蜂属和双齿锤角叶蜂Odontocimbex svenhedini Malaise, 1934,其中双齿锤角叶蜂的雌虫是首次报道。简要讨论了齿锤角叶蜂属Odontocimbex 和锤角叶蜂属Cimbex Olivier、壮锤角叶蜂属 Palaeocimbex Semenov以及毛锤角叶蜂属Trichiosoma Leach的区别。重新指定了双齿锤角叶蜂Odontocimbex svenhedini Malaise的正选模。编制了锤角叶蜂科亚洲分布属分属检索表。     

细爪叶蜂属研究及一新种记述(膜翅目,叶蜂科,平背叶蜂亚科)

对膜翅目叶蜂科平背叶蜂亚科的细爪叶蜂属Filix-ungulia Wei进行了系统研究,描述了分布于中国河南省西部的1新种：Filixungulia cylindrica sp．nov．,该新种唇基黑色,后足跗节细长,不膨大加粗,无硬刺毛,可与同属已知的2种鉴别。细爪叶蜂属是中国特有属,仅分布于中国中部的秦岭山地和中国东北地区,目前已发现3种。该属各足爪十分细长,无内齿和爪基片,与狭义平背叶蜂族已知各属均不相同,容易鉴别。编制了细爪叶蜂属已知种分种检索表,各种给出了简要记述、重要特征图和鉴别特征。新种模式标本保存于中南林学院昆虫标本室。     

黄缘阿扁叶蜂初步研究

黄缘阿扁叶蜂Acan功时出加vomafg加amMaa属膜翅B（Hymenoptera）广背叶蜂总科（Megalodontodea）,扁叶蜂科（Pmphiliidae）,阿扁叶蜂属（Acantholyda）;是马尾松、云南松、华山松的重要食叶害虫。1990年以来在贵州省六枝特区花德河林场大量发生,危害严重,每年成灾面积都在30Ohm以上,单株虫口密度高达2500多条,使松树生长受到严重影响,并出现了个别单株死亡的现象。几年来,各级林业部门投入了大量的人力、物力,组织了多次防治,对该虫的生物学特性和防治方法进行了初步观察研究,结果如下：正形态特征1．1成虫：雌虫体长15～16…     

海南叶蜂补充记录附记中国蔡氏叶蜂属一新种(膜翅目:叶蜂总科)

记述采自中国海南省的叶蜂7属8种,其中分附顺角叶蜂Tenthredo malimilova Wei,2004和台湾钩瓣叶蜂Macrophya formosana Rohwer,1916是海南省新记录,华氏狭背叶蜂Ametastegia huai Wei et Nie,2002的雌虫为首次描述。记述叶蜂科平背叶蜂亚科1新种——黑跗蔡氏叶蜂Caiina nigritarsis Wei,sp．nov．。     

沟角叶蜂属Casipteryx Taeger分类研究(膜翅目:叶蜂科)

本文记述沟角叶蜂属２种,其中包括１新种：宽痣沟角叶蜂Ｃａｓｉｐｔｅｒｙｘｓｔｉｇｍａ,ｓｐ．ｎｏｖ．。文中详细描述了沟角叶蜂属已知２种雌雄两性形态与区别,并给出了重要形态特征图、分布和分种检索表。长痣沟角叶蜂Ｃａｓｉｐｔｅｒｙｘｒｏｂｏｒｏｗｓｋｙｉ（Ｊａｋｏｖ１ｅｖ）的雄性为首次描述。模式标本除另有注明外均保存于中南林学院环境资源系昆虫标本室。     

沟角叶蜂局Casipteryx Taeger分类研究（膜翅目：叶蜂科）

本文记述沟角叶蜂属２种,其中包括１新种：宽痣沟角叶蜂Ｃａｓｉｐｔｅｒｙｘ ｓｔｉｇｍａ,ｓｐ．ｎｏｖ．。文中详细描述了沟角叶蜂属已知２种雌雄两性开矿与区别,并给出了重要形态特征图、分布和分种检索表。长痣沟角叶蜂Ｃａｓｉｐｔｅｒｙｘ ｒｏｂｏｒｏｗｓｋｙｉ（Ｊａｋｏｖｌｅｖ）的雄性为首次描述。模式标本除另有注明外均保存于中南林学院环境资源系昆虫标本室。     

落叶松腮扁叶蜂Cephalcia lariciphila (Wachtl)形态特征及防治对策

自1990年代中期起,北京市门头沟区小龙门林场等地的华北落叶松(Larix principis-rupprechtii Mayr)遭受一种扁叶蜂的危害,不少年份成片的落叶松针叶被食。因雌蜂的触角节数与国内的文献资料不符,该种一直没有鉴定到种。本研究鉴定该种为落叶松腮扁叶蜂Cephalcia lariciphila(Wachtl),对各虫态进行描述并提供彩色图片,同时提出了防治策略,以利用黄绿色胶带诱杀成虫和人工挖除入土的预蛹和蛹为主,以保护作为水源地的生态环境。     

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.