快速周期伏安法在定量研究脑内核团多巴胺释放中的应用

目的和方法：采用快速周期伏安法（ＦＣＶ）在体研究电刺激内侧前脑束（ＭＦＢ）或腹侧背盖区（ＶＴＡ）诱发的纹状体（ＣＰｕ）、伏核（Ａｃｂ）或中央杏仁核（ＣＡＮ）多巴胺（ＤＡ）释放的特点,探索电刺激诱发不同核团ＤＡ释放的适宜刺激参数。结果：ＣＰｕ、Ａｃｂ与ＣＡＮ的ＤＡ释放量及释放动力学特征均有不同。结论：在应用ＦＣＶ技术研究脑内不同部位ＤＡ释放时,应重视适宜刺激参数的选择及运用,以获取更好的实验结果。     

下丘脑穹窿周围区不同部位兴奋对心肌Po_2及ECG－ST的影响

电刺激下丘脑穹窿周围区（ＰＦＡ）的下丘脑背内侧核（ＤＭＨ）,下丘脑腹内侧核（ＶＭＨ）与下丘脑外侧区（ＬＨＡ）均可引起心肌Ｐ０＿２下降与血压升高,而以ＤＭＨ所致的心肌Ｐ０,下降最明显（Ｐ＜０．０１）。心得安可取消电刺激ＬＨＡ所致的心肌ＰＯ＿２下降,部分取消电刺激ＶＭＨ引起的心肌ＰＯ＿２下降,而不改变电刺激ＤＭＨ所致的心肌ＰＯ＿２下降（Ｐ＞０．０５）。ＤＭＨ、ＶＭＨ微量注射谷氨酸钠（０．１ｍｏｌ／Ｌ０．５μｌ）均可诱发升压反应和ＥＣＧ－ＳＴ压低,而ＬＨＡ微量注射谷氨酸却导致降压反应,对ＥＣＧ－ＳＴ无明显影响。上述结果提示ＤＭＨ为ＰＦＡ各区诱发心肌缺血缺氧的主要核团。兴奋ＤＭＨ、ＶＭＨ所致的心血管效应主要由胞体兴奋诱发,而电刺激ＬＨＡ所致的升压反应主要为兴奋过路纤维引起,该区胞体兴奋主要导致降压反应。     

植被类型图的绘制——以西藏植被图为例

植被类型图的绘制———以西藏植被图为例田新智（中国科学院植物研究所,北京１０００９３）ＭＥＴＨＯＤＳＩＮＤＲＡＷＩＮＧＭＡＰＯＦＶＥＧＥＴＡＴＩＯＮＴＹＰＥＴｉａｎＸｉｎｚｈｉ（ＩｎｓｔｉｔｕｔｅｏｆＢｏｔａｎｙ,ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳ...     

植物细胞培养生产紫杉醇的研究进展

植物细胞培养生产紫杉醇的研究进展邢建民查丽杭李佐虎刘大陆（中国科学院化工冶金研究所,北京１０００８０）叶和春李国凤（中国科学院植物研究所,北京１０００９３）ＡＤＶＡＮＣＥＳＩＮＴＨＥＳＴＵＤＹＯＮＴＡＸＯＬＰＲＯＤＵＣＴＩＯＮＢＹＰＬＡＮＴＣＥＬＬＣ...     

下丘脑穹窿周围区不同部位兴奋对心肌Po2及ECG—ST的影响

电刺激下丘脑穹窿周围区（ＰＦＡ）的下丘脑背内侧核（ＤＭＨ）,下丘脑腹内侧核（ＶＭＨ）与下丘脑外侧区（ＬＨＡ）均可引起心肌Ｐｏ２下降与血压升高,而以ＤＭＨ所致的心肌Ｐｏ２下降最明显。心得安可取消电刺激ＬＨＡ所致的心肌Ｐｏ２下降,部分取消电刺激ＶＭＨ引起的心肌Ｐｏ２下降,而不改变电刺激ＤＭＨ所致的心肌Ｐｏ２下降。ＤＭＨ、ＶＭＨ微量注射谷氨酸钠均可诱发升压反应和ＥＣＧ－ＳＴ压低,而ＬＨＡ微量注射谷氨酸却     

池杉─水稻系统的生态效应（Ⅱ）系统的生态环境效应

池杉┐水稻系统的生态效应（Ⅱ）系统的生态环境效应黄兆祥郑珍贵朱笃（南昌大学生物科学工程系,南昌３３００４７）ＥＣＯＬＯＧＩＣＡＬＥＦＦＥＣＴＯＦＴＡＸＯＤＩＵＭＡＳＣＥＮＤＥＮＳ－ＯＲＹＺＡＳＡＴＩＶＡＥＣＯＳＹＳＴＥＭ（Ⅱ）ＥＣＯＬＯＧＩＣＡＬ－...     

马铃薯无病毒苗的获得与病毒检测

马铃薯无病毒苗的获得与病毒检测李宪章李明福侯林林（中国科学院植物研究所,北京１０００９３）ＡＣＱＵＩＲＥＭＥＮＴＯＦＰＯＴＡＴＯＶＩＲＵＳ－ＦＲＥＥＰＬＡＮＴＬＥＴＡＮＤＶＩＲＵＳＤＥＴＥＣＴＩＯＮＬｉＸｉａｎ－ｚｈａｎｇＬｉＭｉｎｇ－ｆｕＨｏｕＬ...     

池杉─水稻系统的生态效应

池杉┐水稻系统的生态效应（Ⅰ）系统中池杉的生长特性黄兆祥郑珍贵朱笃（南昌大学生物科学工程系,南昌３３００４７）ＥＣＯＬＯＧＩＣＡＬＥＦＦＥＣＴＯＦＴＡＸＯＤＩＵＭＡＳＣＥＮＤＥＮＳ┐ＯＲＹＺＡＳＡＴＩＶＡＥＣＯＳＹＳＴＥＭ（Ⅰ）ＴＨＥＧＲＯＷＩＮＧ...     

DETECTION OF INFECTIOUS VIRUS AND VIRAL RNA IN THE MYOCARDIUM OF MICE INFECTED EXPERIMENTALLY WITH COXSACKIE VIRUS’B

ＤＥＴＥＣＴＩＯＮＯＦＩＮＦＥＣＴＩＯＵＳＶＩＲＵＳＡＮＤＶＩＲＡＬＲＮＡＩＮＴＨＥＭＹＯＣＡＲＤＩＵＭＯＦＭＩＣＥＩＮＦＥＣＴＥＤＥＸＰＥＲＩＭＥＮＴＡＬＬＹＷＩＴＨＣＯＸＳＡＣＫＩＥＶＩＲＵＳ’Ｂ３ＸｉａｏｍｅｉＯｕｙａｎｇ,ＨｏｎｇｙｉＺｈａｎ...     

重庆石灰岩植被的排序及其结果解释

重庆石灰岩植被的排序及其结果解释杜道林,刘玉成（西南师范大学生物系,重庆,６３０７１５）ＯＲＤＩＡＴＩＯＮＡＮＤＥＮＶＩＲＯＮＭＥＮＴＡＬＩＮＴＥＲＰＲＥＴＡＴＩＯＮＯＦＴＨＥＣＡＬＣＡＲＥＯＵＳＶＥＧＥＴＡＴＩＯＮＩＮＣＨＯＮＧＱＩＮＧ￥ＤｕＤａｏ...     

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.