论挖掘蝗卵和新翻蝗卵

东亚飞蝗自古以来是中国农业上的头号害虫,历史和地方志上记载很多。农民为了保护生产,想尽种种办法和蝗虫作斗争,在耕作过程中观察到雌蝗产一卵于土下一二寸处,集数十粒至百余粒成一卵块,挖掉一个卵块就可少生几十只蝗虫,因此挖掘蝗卵是很久以前农民自己创造的治蝗方法之一。后来生产发展了,也有用犁耕翻蝗卵的,耕翻时可以直接或间接地杀死部分蝗卵。所以在较早年代的农书或治蝗书     

中国蝗科新纪录属——幽蝗属

幽蝗属(Ogneria Ikonn.)在国外已知分布于苏联滨海区和朝鲜。1979—1980年笔者在吉林省安图县长白山进行蝗虫调查时,于长白山二道白河采到本属标本8枚(5 3),系我国新纪录,经鉴定为安图幽蝗 Ognevia sergii Ikonn. 雄:体长18.0—23.7毫米,前翅长16.6—20.8毫米。雌:体长26.7—35.6毫米,前翅长20.2—     

翘尾蝗属二新种(直翅目:蝗科,斑腿蝗亚科)

翘尾蝗属已知有11种,分布在亚洲的东部。我国已知有2种,主要分布在东北。经对动物所馆藏标本的整理,发现2新种及2新记录。模式标本存放在中国科学院动物研究所。 种检索表     

南疆束颈蝗属二新种：蝗总科：斑翅蝗科

本文记述采自新疆南部地区束颈蝗属二新种,叶城束颈蝗Ｓｐｈｉｎｇｏｎｏｔｕｓｙｅｃｈｅｎｇｅｎｓｉｓ ｓｐ．ｎｏｖ．及塔克拉玛束颈蝗Ｓｐｈｉｎｇｏｎｏｔｕｓ ｔａｋｒａｍａｅｎｓｉｓ ｓｐ．ｎｏｖ．模式标本保存于陕西范大学动物研究所标本室。     

中国无翅蝗属三新种(蝗科, 斑腿蝗亚科)

无翅蝗属Zubovskia已知有6种,主要分布在古北区。我国已知有3种即小无翅蝗Zubovskia Parvula(Ikonn.),柯无翅蝗Zubovskia koePpeni(Zub.)和平尾无翅蝗Zubov-skia Planicaudata Jin。本文记述了三新种。Z.morii(B.-Bienko)后足胫节具外端刺,不宜放在此属内。 模式标本存于中国科学院动物研究所。     

甘肃省痂蝗属一新种（蝗总科：斑翅蝗科）

本文记述采自甘肃省肃北县鱼儿红牧场的斑翅蝗科痂蝗属Ｂｒｙｏｄｅｍａ一新种,野马山痂蝗Ｂ．ｙｅｍａｓｈａｎａ ｓｐ．ｎｏｖ．,新种与透翅痂蝗Ｂ．ｈｙａｌｉｎａｌａ Ｚｈｅｎｇ ｅｔ Ｚｈａｎｇ近似。     

东北地区跃度蝗属的研究(蝗总科:网翅蝗科)

跃度蝗属Podismopsis Zub.为Zubovsky于1899年在绿洲蝗属(Chrysochraon)中建立的一个亚属,Uvarov 1925年提升为属。Bei-Bienko 1932年在Podismopsis属下建立了Eurasiobia,Podismacris及Podismopsis三个亚属,而在1951年Bei-Bienko及Mistshenko又将Eurasiobia亚属合并到Podismopsis亚属中。Jago于1971年曾建议将Podismopsis,Podismacris,Eurasiobia及Barracris都合并到绿洲蝗属中。     

中国窝蝗属一新种：直翅目：蝗总科：剑角蝗科

本文了剑角蝗科窝蝗属１新种：郑氏窝蝗Ｆｏｖｅｏｌａｔａｃｒｉｓ ｚｈｅｎｇｉ,ｓｐ．ｎｏｖ。,采自甘肃省南县宝瓶河牧场;并据此对属征作了必要的修订,给出了分种检索表。模式标本保存于陕西师范大学动物研究所。     

甘肃省雏蝗属一新种记述（蝗总科：网翅蝗科）

本文记述了雏蝗属一新种：短角雏蝗（Ｃｈｏｒｔｈｉｐｐｕｓｂｒｅｖｉｃｏｒｎｉｓｓｐ．ｎｏｖ．,采自甘肃省肃南县宝瓶河牧场。模式标本存于陕西师范大学动物研究所。     

中国突颜蝗属一新种(直翅目,蝗总科,癞蝗科,锯癞蝗亚科)

记述了我国突颜蝗属1新种,蓝足突颜蝗Eotmethiscyanipes sp.nov.,模式标本保存于河北大学生命科学学院.蓝足突颜蝗,新种Eotmetis cyanipes sp.nov.(图1～2)新种因后足股节和胫节内侧全为蓝色而与所有已知种相区别.正模♂,宁夏石嘴山(39°15′N,106°41′E;海拔1 180 m),2003-07-20,李新江、王文强采.副模:1 ♂,2♀♀,分布及采集同正模.词源:新种种名源自蓝色和后足两个单词的拉丁语.     

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.