蜣盾螨属在我国首次发现及一新种记述(蜱螨亚纲:犹伊螨科)

本文记述蜣盾螨属一新种—果洛蜣盾螨Scarabaspis goulouensis sp.nov.标本采自青海果洛自治州玛沁和达日县的蜣螂体上。本属在我国系首次发现。     

蜣盾螨属一新种

本文记述蜣盾螨属一新种,凹胸蜣盾螨Ｓｃａｒａｂａｓｐｉｓ ｃｏｎｃａｖｕｓ ｓｐ,ｎｏｖ。,标本采自云南省元江县的蜣螂体上,存放在南京大学医学院寄生虫学教研室。     

常革螨属一新种和下盾螨属一新种(蜱螨亚纲:革螨股:寄螨科,厉螨科)

记述常革螨属1新种：湖北常革螨Vulgarogamasus huberensis Ma et Liu,sp.nov.和下盾螨属1新种：类刺下盾螨Hypoaspis spinaperaffinis Ma et Cui,sp.nov.。     

吉林省下盾螨属三新种（蜱螨亚纲：厉螨科）

吉林省已发现的下盾螨有溜下盾螨Ｈｙｐｏａｓｐｉｓ ｌｕｂｒｉｃａ Ｖｏｉｇｔｓ ｅｔ Ｏｕｄｅｍａｎｓ,力下盾螨Ｈｙｐｏａｓｐｉｓ ｈｒｄｙｉ Ｓａｍｓｉｎａｋ和尖狭下盾螨Ｈｙｐｏａｓｐｉｓ ａｃｕｌｅｉｆｅｒ（Ｃａｎｅｓｔｒｉｎｉ）。另外采到三新种,命名为松江下盾螨Ｈｙｐｏａｓｐｉｓ ｓｕｎｇａｒｉｓ ｓｐ．ｎｏｖ．,柔弱下盾螨Ｈｙｐｏａｓｐｉｓ ｄｅｂｉｌｉｓ ｓｐ．ｎｏｖ．和长毛下质螨Ｈｙｐ     

周氏下盾螨、内蒙下盾螨和网状广厉螨补充描述(蜱螨亚纲:革螨股:厉螨科)

本文对周氏下盾螨Hypoaspis zhoumanshuae Ma, 1997、内蒙下盾螨Hypoaspis neimongolianus Ma et Wang, 1998和网状广厉螨Cosmolaelaps reticulatus Xu et Liang, 1996进行补充描述.     

昆虫携播螨-下盾螨属二新种和密卡螨属一新种(蜱螨亚纲:革螨股:厉螨科,裂胸螨科)

记述下盾螨属2新种和密卡螨属1新种：重庆下盾螨Hypoaspis chongqingensis sp．nov．t似陆下盾螨Hypoaspis terrestrisimilissp．nov．和粗刺密卡螨Melichares crassispinus sp．nov．。     

多盾螨科在中国首次纪录及异多盾螨属1新种描述（蜱螨亚纲：尾足螨股）

记述多盾螨科异多盾螨属１新种：贺氏异多盾螨Ｐｏｌｙａｓｐｉｎｕｓ ｈｅｊｉａｎｇｕｏｉ ｓｐ．ｎｏｖ．,该科和属在中国为首次纪录。     

柔弱下盾螨雌螨形态补充及后若螨描述(蜱螨亚纲:革螨股:厉螨科)

本文补充柔弱下盾螨 Hypoaspis debilis Ma, 1996 雌螨形态特征,并描述其后若螨.     

吉林省下盾螨属一新种(蜱螨亚纲:革螨股)

记述下盾螨属一新种：白城下盾螨Ｈｙｐｏａｓｐｉｓ ｂａｉｃｈｅｎｇｅｎｓｉｓ Ｍａ,ｓｐ．ｎｏｖ．。     

宁夏下盾螨属三新种──（蝉螨亚纲：厉螨科）

宁夏下盾螨属三新种（蝉螨亚纲：厉螨科）白学礼,陈百芳,顾以铭宁夏回族自治区地方病防治所,宁夏银川市７５０００４南京大学医学院,江苏省南京市２１０００８关键词蜱螨亚纲,厉螨科,下后螨属,新种在整理宁夏革螨标本中,发现了下盾螨属Ｈｙｐｏａｓｐｉｓ３新种,...     

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.