福建泉州爬行动物的调查及区系分析

本文报道泉州市的爬行动物共 5 8种 ,分析了这 5 8种爬行类所属的动物区系。它们当中属于古北界的仅 2种 ,属于东洋界的有 5 3种 ,其中华南区与华中区共有者 30种 ,华中区的种类 4种 ,华南区的种类有 19种 ,说明泉州市爬行类的区系组成是以华南区的种类占优势。     

广东省鼎湖山两栖动物多样性初步研究

鼎湖山两栖动物有16种,隶属2目6科9属。华中华南区种类占优势有10种,为62.5%;华南区4种,为25.0％;华中区2种,为12.5％。从该地区两栖动物区系、分布及种类组成相似性分析为华中我向华南区过渡地带。加强对两栖动物保护,对维护该地区森林生态平衡、对生物多样性研究具有重要价值。     

北碚的两栖动物

北碚有两栖类动物11种,隶属1目4科4属。分为3种生态类型。区系成分以华中华南区和华中区成分为主。     

贵州省8个自然保护区爬行动物分布

报道了贵州省8个自然保护区86种(亚种)爬行动物的分布状况。对贵州省自然保护区爬行动物种数和区系成分与保护区面积、森林面积、年均温、年均降水量、经度、纬度、海拔低点、海拔高点、相对高差等环境因素进行了相关性分析及t-检验。发现在贵州省爬行动物种数除与保护区面积和森林面积呈极显著正相关外,还与经度显著正相关;华中华南区种数与经度显著正相关;华南区种数与纬度显著负相关,与年均降水量显著正相关。本文还探讨了爬行动物的分布特点,包括经度和纬度地理替代。发现由西向东,西南区种的比例逐渐减少,华中区种和华中及华南区种的比例逐渐增加,呈现经度地带性变化。由北向南古北界东洋界广布种的比例逐渐减少、华中及华南区种和华南区种的比例逐渐增加,呈纬度地带性变化。     

云南建水燕子洞地区两栖爬行动物的考察研究

建水燕子洞地区有两栖爬行类３８种,隶属５目１６科２８属。特点是：物种多样性较丰富;东洋界种类占绝对优势;两栖类中西南区占优势,爬行类中华南区占优势;设有华中区种类华中华南广布种也较少;云南特有或主产于云南的种较多,有７种（亚种）,除八莫过树蛇之外,其他红瘰蠓螈、蓝尾蝾螈等６种为中国特有种（亚种）;经济两栖爬行动物多;栖息于洞口及洞内种类多。优势种仅泽蛙、半叶趾虎及红脖颈槽游蛇３种,稀有种１８种。国     

澜沧江漫湾电站水库地区爬行动物多样性研究

漫湾电站水库地区有爬行动物４６种,隶属３目１０科３７属。特点是：（１）特种多样性很丰富,为中国扑行类种娄１１．８９％,为云南的３０．４６％,是云南省和全国爬行类很丰富的地区;（２）东洋界种类占绝对优势（９７．８３％）,没有古北界种类,古北东洋两界广布种仅１种;（３）西南区与华南区种类分别为２０及１９种;华中区及华中华南两区广布种很少;（５）特有种多,在我国主要产于云南有８种,占１７．３９％,其中云     

黑石顶自然保护区两栖动物资源和区系特征的研究

报道了黑石顶自然保护区两栖动物资源和区系特征的调查结果．已知有２１种（包括亚种）１１属７科２目．在２１种两栖动物中,它们都属于东洋界物种,其中华中区和华南区的共有物种占６１．８％,而属华中区的物种占１９．１％属华南区的物种也占１９．１％．还分析了黑石顶自然保护区两栖动物群落的水平分布和垂直分布的特征     

广东肇东七星岩地区两栖爬行动物多样性及其保护

肇庆七星岩地区有两栖动物12种,隶属1目5科7属,爬行动物25种,隶属2目18属,华中－华南种类占优势有20种,占54．1％,华南区12种,占32．4％,华中区1种,占2．7％,古北－东洋广布种4种,占10．8％,建议在开发旅游资源的同时,加强对该地区两栖爬行动物种多样性及其生境的保护。     

江西武夷山国家级自然保护区两栖动物多样性初报

2006年7月对江西武夷山国家级自然保护区进行了野外调查.该保护区共有两栖动物28种,隶属于2目8科18属.其中广布种3种,占10.7%,其余25种均为东洋界种类,比例高达89.3%.东洋界种类中,华中区物种有9种,占32.2%;属华中华南区共同分布的有16种,占57.1%.该区以蛙科为优势科,其中又以臭蛙属和水蛙属为优势属.考察中发现了九龙棘蛙和武夷湍蛙两个江西省两栖动物新纪录,至此江西省两栖动物种类增至41种.     

广西猫街自然保护区两栖动物资源调查及保护

2003年3~7月,对广西猫街自然保护区的两栖动物资源进行了调查。结果表明:该保护区有两栖动物16种,隶属12属6科2目;动物地理区划属东洋界华南区闽广沿海亚区滇桂山地丘陵省,区系组成以华中区与华南区共有种为主;生态类型以流水型和陆栖静水型种类占优势;保护区和同样地处桂西的大王岭自然保护区、岑王老山自然保护区的两栖动物群落相似系数较高,而与桂北地区的桂林漓江风景名胜区和桂南地区的挂榜山的相似系数最小。根据资源现状提出了保护对策。     

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.