蝎蛉属Panorpa东北一新种（长翅目：蝎蛉科）

本文描述产自中国东北辽宁和黑龙江的蝎蛉１新种－刘氏蝎蛉Ｐａｎｏｒｐａ ｌｉｕｉ,ｓｐ．ｎｏｖ．。模式标本保存在西北农业大学昆虫博物馆。     

河南省伏牛山蝎蛉记述：长翅目：蝎蛉科

本文报道了１９９６年７月河南省伏牛山昆虫考察中采到的蝎蛉科６种昆虫,其中蝎蛉属Ｐａｍｏｒ ｐａ４种,即大蝎蛉Ｐａｎｏｒ ｐａ ｍａｇｎａ Ｃｈｏｕ,六刺蝎蛉Ｐ．ｓｅｘｓｐｉｎａ Ｃｈｅｎｇ,华山蝎蛉Ｐ．ｅｍａｒｇｉｎａｔａ Ｃｈｅｎｇ和伏牛山蝎蛉Ｐ．ｆｕｎｉｕｓｈａｎａ Ｈｕａ ｅｔ Ｃｈｏｕ,ｓｐ．ｎ。新蝎蛉属Ｎｅｏ ｐａｎｏｒ ｐａ２种,即河南新蝎蛉Ｎｅｏｐａｎｏｒ ｐａ ｌｏｎｇｉｐｒｏｃｅ     

蝎蛉属Panorpa一新种记述(长翅目:蝎蛉科)

记述采自河南省王屋山的蝎蛉属Panorpa Linn．1新种：王屋山蝎蛉Panorpa wangwushana,sp．nov．。模式标本分别保存在西北农林科技大学昆虫博物馆和郑州大学生物系。     

刘氏蝎蛉雌性生殖系统的构造

解剖并描述了刘氏蝎蛉Panorpa liui Hua的雌性生殖系统。结果表明,刘氏蝎蛉外生殖器包括下生殖板、内骨,内生殖器官包括卵巢、侧输卵管、中输卵管、附腺、受精囊以及生殖腔。每个卵巢由10~13根多滋式卵巢管组成,12根出现频率最高。     

扁蚊蝎蛉的行为学观察

通过室内饲养和观察,记述了扁蚊蝎蛉Bittacus planusCheng成虫捕食过程、雌雄交配和产卵行为。捕食过程分准备、捕捉、取食和清洁等4个步骤。观察到了雄虫的献礼行为,雌虫边取食边交配。存在有自相残杀行为。     

蝎蛉科与蚊蝎蛉科昆虫触角感器超微形态比较

触角是昆虫重要的感觉器官,其感觉功能主要是通过其上的各类感器来实现的。本文以染翅蝎蛉Sinopanorpa tincta(Nav偄s)和中华蚊蝎蛉Bittacus sinensis Walker为代表,采用扫描电子显微镜观察了蝎蛉科Panorpidae和蚊蝎蛉科Bittacidae触角感器的类型及其超微结构,并简要讨论了各种感器的功能。结果显示:染翅蝎蛉触角上共发现7种感器,分别为短刺形感器、Bhm氏鬃毛、毛形感器、短毛形感器、锥形感器、刺形感器、和微毛形感器。中华蚊蝎蛉触角上也发现7种感器,分别为Bhm氏鬃毛、芽形感器、毛形感器、刺形感器、畸形毛感器、腔锥感器和钟形感器。蚊蝎蛉触角与蝎蛉的最大区别是着生有大量的腔锥感器,初步推测众多的腔锥感器可能与蚊蝎蛉对湿度的高度敏感有关。     

中国蚊蝎蛉属四新种记述(长翅目,蚊蝎蛉科)

记述了中国蚊蝎蛉属Bittacus Latreille 4新种,即暗蚊蝎蛉Bittacus obscurus sp.nov.,浅黄蚊蝎蛉Bittacusflavidus sp nov,长突蚊蝎蛉Bittacus longiprocessus sp.nov.和四边蚊蝎蛉Bittacus trapezoideus sp.nov..模式标本保存于西北农林科技大学昆虫博物馆.     

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.