宁夏六盘山自然保护区多毛蚤属和二刺蚤属新种记述(蚤目,多毛蚤科,细蚤科)

记述多毛蚤科Hystrichopsyllidae Tiraboschi,1904,多毛蚤属Hystrichopsylla Taschenberg,1880无腹栉蚤亚属Hystriceras Ioff et Scalon,1950的1新种和细蚤科Leptopsyllidae Baker,1905,二刺蚤属Peromyscopsylla I.Fox,1939的1新种,标本采自宁夏六盘山自然保护区短尾鼩Anourosorex squamipes Milne-Edwards,1870体上,模式标本保存于军事医学科学院微生物流行病研究所医学昆虫标本馆和宁夏回族自治区疾病预防控制中心。     

青海多毛蚤属一新种记述（蚤目：多毛蚤科）

本文报道多毛蚤属Ｈｙｓｔｒｉｃｈｏｐｓｙｌｌａ的一新种,文贞多毛蚤Ｈ．ｗｅｎｚｈｅｎｉ ｓｐ．ｎｏｖ．,新种与近缘种圆凹多毛蚤Ｈ．ｒｏｔｕｎｄｉｓｉｎｕａｔａ,多刺多毛蚤Ｈ．ｍｕｌｔｉｄｅｎｔａｔａ和尼泊尔的Ｈ．ｓｙｎａｐｔｉｃａ接近而又有明显区别,新种采自青海省同德县的斯氏水麝鼠句Ｃｈｉｍａｒｒｏｇａｌｅ ｓｔｙａｎｉ,标本存青海省地方病防治研究所。     

多毛蚤属一新种记述(蚤目:多毛蚤科)

本文报告多毛蚤属Hystrichopsylla的一新种,陕西多毛蚤H. shaanxiensis sp. nov., 采自陕西南部大巴山区大林姬鼠(Apodemus speciosus)体上,存于陕西省卫生防疫站。     

青海省多毛蚤属一新种记述(蚤目:多毛蚤科)

报道多毛蚤属Ｈｙｓｔｒｉｃｈｏ「ｐｓｙｌｌａ Ｔａｓｃｈｅｎｂｅｒｇ一新种,詹氏多毛蚤Ｈｙｓｔｒｉｃｈｏｐｓｙｌｌａ ｚｈａｎｉ ｓｐ．ｎｏｖ．,采自青海省民和县古鄯林场的斯氏水麝Ｑｕ Ｃｈｉｍａｒｒｏｇａｌｅ ｓｔｙａｎｉ体上。模式标本存于青海省地方病防治研究所。     

高黎贡山多毛蚤属一新种(蚤目:多毛蚤科)

在鉴定1987年底从滇西高黎贡山南段西坡采获的一批多毛蚤(Hystrichopsylla)中,发现其中自克钦绒鼠(Eothenomys cachinus)巢的两只雌性标本为一新种。新种蚤以自登云主任的姓氏命名,以此对他近年给予我们工作上的支持和帮助表示敬意。 自氏多毛蚤Hystrichopslla(Hystroceras)zii新种 鉴别特征 本新种的颊栉较少(4到6根)和前胸栉较多(40余根)与颊板多毛蚤H.     

自氏多毛蚤雄性的记述

对自氏多毛蚤Hystrichopsylla(Hystroceras)zii Gong,1992雄性首次进行了记述。标本保存于云南省地方病防治所。     

高黎贡山古蚤属三新种记述：蚤目：多毛蚤科

本文报告高黎贡山古蚤属Palaeopsylla 3新种:宽指古蚤 P.laxiaigita sp.nov.,属鼩鼱种团soricis-group;多棘古蚤 P.palyspina sp.nov.,属偏远种团 remota-group;中突古蚤 P.mediminasp.nov.属短额种团brevifrontata-group。据新种形态与有关的种团特征作了比较和讨论。     

云南西部狭臀蚤属四新种记述：蚤目：多毛蚤科

本文报告云南西部狭臀蚤属Steni(?)chia 4新种:1)金氏狭臀蚤,新种 S.chini sp.nov.与锐额狭臀蚤 S.angustifrontalis Xie et Gong接近;2)李氏狭臀蚤,新种 S.liae sp.nov.与金氏狭臀蚤新种和锐额狭臀蚤接近;3)柳氏狭臀蚤,新种 S.liui sp.nov.与李氏狭臀蚤新种和高山狭臀蚤S.montanis xie et Gong接近。4)吴氏狭臀蚤,新种 S.wui sp.nov.与卢氏狭臀蚤 S.lewis Smit接近。本文认论了李氏狭臀蚤新种与金氏狭臀蚤新种的形态分类及本属蚤类的宿主等生态问題,并编制本属14种的检索表。     

高黎贡山柳氏蚤属一新种记述（蚤目：多毛蚤科）

本文记述柳氏蚤属Liuopsylla一新种,杆形柳氏蚤L.clavula sp.nov.。新种与锥形柳氏蚤L.conica Zhang,Wu et Liu,1985接近,但有明显区别。标本采自云南高黎贡山多齿鼩鼹(Nasillus gracillis)体上。     

古蚤属一新种记述（蚤目：多毛蚤科）

本文记述采自经省神农架林区古蚤属Ｐａｌａｅｏｐｓｙｌｌａ Ｗａｇｎｅｒ,１９０３－新种,巫山古蚤Ｐａｌａｅｏｐｓｙｌｌａ ｗｕｓｈａｎｅｎｓｉｓ ｓｐ．ｎｏｖ．,模式标本存于湖北省医学科学院寄生虫病研究所。     

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.