国人睾丸、附睾和输精管的氧化还原酶的组织化学观察

本文收集了１９—３８岁国人正常男性新鲜睾丸、附睾和输精管１３例,进行了氧化还原酶组织化学染色、光镜定位及定性观察。结果表明：睾丸曲细精管和输出小管上皮的ＧＤＨ,ＮＡＤＨＤ,ＮＡＤＰＨＤ,ＳＤＨ,ＧＰＤＨ,ＩＣＤＨ,ＭＤＨ,ＬＤＨ和Ｇ－６－ＰＤＨ９种酶;睾丸间质细胞和附睾管上皮的ＮＡＤＨＤ,ＮＡＤＰＨＤ,ＳＤＨ,ＩＣＤＨ,ＭＤＨ,ＧＤＨ,ＬＤＨ和Ｇ－６－ＰＤＨ８种酶;输精管的ＮＡＤＨＤ,ＮＡＤＰＨＤ,ＩＣＤＨ和ＧＤＨ４种酶的酶活性呈强阳性或极强阳性。提示输出小管和头部附睾管含有的多种氧化还原酶对精子功能成熟有极重要作用。     

国人睾丸、附睾和输精管的水解酶的组织化学观察

本文报导国人睾丸、附睾和输精管的ＮＳＥ,ＡＣｈＥ,ＣｈＥ,ＡＬＰ,ＡＣＰ,５＇－Ｎａｓｅ,Ｇ－６－Ｐａｓｅ,β－ＧＡ,β－ＧＲ,ＡＰ－Ｍ,ＡＴＰａｓｅ和ＴＰＰａｓｅ水解酶的组织化学活性、结果显示：睾丸曲细精管的ＡＬＰ,５＇－Ｎａｓｅ和ＡＴＰａｓｅ;睾丸间质细胞的ＮＳＥ,ＡＬＰ,ＡＴＰａｓｅ和ＡＣＰ;睾丸间质中的ＮＳＥ,ＡＬＰ和ＡＴ－Ｐａｓｃ;睾丸输出小管和附睾管上皮的ＮＳＥ,ＡＬＰ,ＡＣＰ,５’－Ｎａｓｅ,β－ＧＡ,β－ＧＲ,ＡＴＰａｓｅ和Ｔｐｐａｓｅ;附睾头部间质中的ＮＳＥ,ＡＣｈＥ,ＡＬＰ,和ＡＴＰａｓｅ;输精管上皮细胞的ＡＴＰａｓｅ的酶活性均呈强阳性或极强阳性。说明人类睾丸、附睾和输精管含有丰富的水解酶,尤其是附睾头部的输出小管、附睾管和头质均含有种类多活性高的水解酶,在精子的功能成熟上起了重要的作用,提示其可能作为生育与不育诊治中的重要指标。     

棕背鼠最适生境及其主导因子分析

棕背鼠最适生境及其主导因子分析ＴＨＥＯＰＴＩＭＡＬＢＩＯＴＯＰＥＯＦＬＡＲＧＥ－ＴＯＯＴＨＥＤＲＡＤ－ＢＡＣＫＥＤＶＯＬＥＡＮＤＴＨＥＡＮＡＬＹＳＥＳＯＦＩＴＳＭＡＩＮＦＡＣＴＯＲＳＫｅｙｗｏｒｄｓＬａｒｇｅ－ｔｏｏｔｈｅｄｒａｄ－ｄａｃｋｅｄｖｏｌ...     

应用放射性自显影技术检测外源DNA与鸡精子的结合

应用放射性自显影技术检测外源ＤＮＡ与鸡精子的结合ＤＥＴＥＣＴＩＮＧＡＳＳＯＣＩＡＴＩＯＮＯＦＥＸＯＧＥＮＯＵＳＤＮＡＷＩＴＨＣＨＩＣＫＥＮＳＰＥＲＭＵＳＩＮＧＡＵＴＯＲＡＤＩＯＧＲＡＰＨＹ关键词鸡，精子，脂质体，ＤＮＡ与精子的结合ＫｅｙｗｏｒｄｓＣｈ...     

植物热激蛋白及其功能

植物热激蛋白及其功能＊刘德立（华中师范大学生物系,武汉４３００７０）ＨＥＡＴ－ＳＨＯＣＫＰＲＯＴＥＩＮＳＯＦＰＬＡＮＴＳＡＮＤＴＨＥＩＲＦＵＮＣＴＩＯＮＳＬｉｕＤｅ－ｌｉ（ＢｉｏｌｏｇｙＤｅｐａｒｔｍｅｎｔｏｆＨｕａｚｈｏｎｇＮｏｒｍａｌＵｎｉｕｅｒ...     

热激蛋白的分子生物学研究进展

热激蛋白的分子生物学研究进展费云标,黄涛,舒念红,江勇（中国科学院发育生物研究所,北京１０００８０）ＡＤＶＡＮＣＥＳＯＦＭＯＬＥＣＵＬＡＲＢＩＯＬＯＧＹＯＮＨＥＡＴＳＨＯＣＫＰＲＯＴＥＩＮＳ￥ＦｅｉＹｕｎ－ｂｉａｏ;ＨｕａｎｇＴａｏ;ＳｈｕＮｉａｎ－...     

家蝇体内卵对CAT的摄入和传代的观察

家蝇体内卵对ＣＡＴ的摄入和传代的观察ＩＮＴＡＫＩＮＧＡＮＤＴＲＡＮＳＭＩＳＳＩＯＮＯＦＩＮＪＥＣＴＥＤＣＡＴＧＥＮＥＢＹＨＯＵＳＥＦＬＹＥＧＧＳ关键词ＣＡＴ基因,家蝇,腹腔注射,基因转移ＫｅｙｗｏｒｄｓＣＡＴ－ｇｅｎｅ,Ｈｏｕｓｅｆｌｙ,Ａｂｄｏｍｉ...     

银杏胚胎发育研究述评──兼论银杏系统发育

银杏胚胎发育研究述评──兼论银杏系统发育邢世岩,孙霞（山东省林业学校泰安２７１０００）ＡＲＥＶＩＥＷＯＮＴＨＥＥＭＢＲＹＯＬＯＧＹＯＦＧＩＮＫＧＯＢＯＬＯＢＡＷＩＴＨＡＤＩＳＣＵＳＳＩＯＮＯＮＴＨＥＰＨＹＴＯＧＥＮＥＴＩＣＤＥＶＥＬＯＰＭＥＮＴ￥Ｘｉ...     

鳙团移核鱼的遗传性状与个体生长

鳙团移核鱼的遗传性状与个体生长ＧＥＮＥＴＩＣＣＨＡＲＡＣＴＥＲＡＮＤＩＮＤＩＶＩＤＵＡＬＧＲＯＷＴＨＯＦＴＨＥＴＲＡＮＳＮＵＣＬＥＵＳＦＩＳＨＯＦＴＨＥＢＩＧＨＥＡＤＡＮＤＴＨＥＢＬＵＮＴＳＮＯＵＴＢＲＥＡＭ关键词鳙团移核鱼遗传性状个体生长Ｋｅｙ...     

细锚三代虫前附着器超微结构的研究

细锚三代虫前附着器超微结构的研究ＵＬＴＲＡＳＴＲＵＣＴＵＲＥＯＦＴＨＥＡＮＴＥＲＩＯＲＡＤＨＥＳＩＶＥＡＰＰＡＲＡＴＵＳＩＮＴＨＥＭＯＮＯＧＥＮＥＡＮＧＹＲＯＤＡＣＴＹＬＵＳＳＰＲＯＳＴＯＮＡＥ关键词三代虫鱼类寄生虫附着器超微结构ＫｅｙｗｏｒｄｓＧｙ...     

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.