中国直斑蝇属一新种(双翅目,斑蝇科)

记述采自中国内蒙古的直斑蝇属(双翅目,斑蝇科)1新种,并编制了中国直斑蝇属分种检索表。内蒙直斑蝇,新种Tetanops neimonggolica sp.nov.(图1~8)新种头部特征与T.myopina Fallén近似,但翅几乎完全透明,仅在翅基径室内有非常模糊的小斑;新种的翅特征与T.sintenisi Becker近似,但头黄色且额的大部分覆有灰色粉被。词源:新种以采集地命名。模式标本保存于中国科学院动物研究所。     

中国内蒙古溜蝇属一新种记述(双翅目:蝇科)

内蒙古溜蝇,新种Ｌｉｓｐｅ ｎｅｉｍｏｎｇｏｌａ Ｔｉａｎ ｅｔ Ｍａ,ｓｐ．ｎｏｖ（图１～４）,♂,体长约５．５ｍｍ。新种隶属于须瘤蝇种团（ｐａｌｋｐｏｓａ－ｇｒｏｕｐ）,与中国河北省的河北溜蝇,Ｌｉｓｐｅ ｈｅｂｅｉｅｎｓｉｓ Ｍａ ｅｔ Ｔｉａｎ,１９９３极近似。但新种的腹部背板无正中斑条,在第３～５背板后缘两侧各有１个黑色斑,中股基半部有１列长大的前腹鬃,中胫无后腹鬃,而河北溜虽的腹部背板     

云南棘蝇属三新种(双翅目:蝇科)

报道了采自云南省的蝇科棘蝇属Ｐｈａｏｎｉａ Ｒ．－Ｄ．３新种,分别命名为明斑棘蝇Ｐｈａｏｎｉａ ｌｕｃｕｌｅｎｔｉｍａｃｕｌａ ｓｐ．ｎｏｖ．、刺尾棘蝇Ｐｈａｏｎｉａ ｓｐｉｎｉｃａｕｄａ ｓｐ．ｎｏｖ．和毛盾棘蝇Ｐｈａｏｎｉａ ｖｉｌｌｉｓｃｕｔｅｌｌａｔａ ｓｐ．ｎｏｖ．,均隶属于棕斑棘蝇种团Ｐｈ．ｆｕｓｃａｔａ－ｇｒｏｕｐ。模式标本保存于沈阳师范学院昆虫研究所。     

云南省阳蝇属五新种(双翅目:蝇科)

报道云南省蝇科Ｈｅｌｉｎａ Ｒ．－Ｄ．５新种,分别命名为保山阳蝇Ｈｅｌｉｎａ ｂａｏｓｈａｎｅｎｓｉｓ ｓｐ．ｎｏｖ．、贡山阳蝇Ｈｅｌｉｎａ ｇ９ｏｎｇｓｈａｎｅｎｓｉｓ ｓｐ．ｎｏｖ．、大黑阳蝇Ｈｅｌｉｎａ ｌａｒｇｉｎｉｇｒａ ｓｐ．ｎｏｖ．、马氏阳蝇Ｈｅｌｉｎａ ｍａａｅ ｓｐ．ｎｏｖ．和豹腹阳蝇Ｈｅｌｉｎａ ｐａｒｄｉａｂｄｏｍｉｎｉｓ ｓｐ．ｎｏｖ．。模式标本保存于沈阳师范学院昆虫研究所     

中国秽蝇属二新种（双翅目：蝇科）

本文记述分别采自山西和陕西的秽蝇属２新种：斑股秽蝇Ｃｏｅｎｏｓｉａ ｐｕｎｃｔｉｆｅｍｏｒａｔａ ｓｐ．ｎｏｖ．和太白山秽蝇Ｃｏｅｎｏｓｉａ ｔａｉｂａｉｓｈａｎｎａ ｓｐ．ｎｏｖ．。模式标本分别保存于沈阳师范学院生物系和西北农业大学昆虫博物馆。     

中国四川省有瓣蝇类三新种：双翅目：麻蝇总科,蝇总科

本文报道四川省有瓣蝇类３新种,小口瘦粉蝇Ｄｅｘｏｐｏｌｌｅｎｉａｐａｒｖｉｏｓｔｉａｓｐ．ｎｏｖ（丽蝇科）齿腹粪蝇Ｓｃａｔｈｏｐｈａｇａｏｄｏｎｔｏｓｔｅｒｎｉｔａｓｐ．ｎｏｖ（粪蝇科）,橙须重毫蝇Ｄｉｃｈａｅｔｏｍｙｉａｐａｌｐｉａｕｒａｎｔｉａｃａｓｐ．ｎｏｖ（蝇科）模式标本存北京军事医学科学院医学昆虫标本馆。     

甘肃南部头蝇科一新种（双翅目）

本文描述了采自甘肃文县头蝇科,肾头蝇属（ＮｅｐｈｒｏｃｅｒｕｓＺｅｔ．）一新种,其主要特征：中胸背板两侧各具一耳状薄片突起物,后足转节后腹面具５枚短且粗的黑刺,第１腹节背板具“Ｙ”字形斑,第２及第３腹节背板具倒吊钟状斑     

中国棘蝇属二新种（双翅目：蝇科）

本文报道了采自中国贵州省梵净山的棘蝇属Ｐｈａｏｎｉａ Ｒｏｂｉｎｅａｕ－Ｄｅｓｖｏｉｄｙ,１８３０二新种：拱腹棘蝇Ｐ．ａｒｃｕａｔｉｃａｕｄａ Ｃｈｅｎ ｅｔ Ｘｕｅ,ｓｐ．ｎｏｖ．,板齿棘蝇Ｐ．ｌａｍｉｎｉｄｅｎｔａ Ｘｕｅ ｅｔ Ｃｕｉ,ｓｐ．ｎｏｖ．。模式标本保存于沈阳师范学院生物系。     

中国角斑蝇属二新记录种

记述中国斑蝇科Ulidiidae角斑蝇属Ceroxys Macquart,1835的2个新记录种:洁角斑蝇Ceroxys munda(Loew,1868)和壮角斑蝇Ceroxys robusta(Loew,1873),并附形态特征图。     

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.