热带水稻和豆科作物病毒病国际讨论会简介

(一)会议概况: 热带水稻和豆科作物病毒病国际讨论会于1985年10月1—5日在日本筑波热带农业研究中心(TARC)举行。会议由TARC总所长Ken-Ichi Hayashi博士筹集召开。会议主席由各国主要代表轮流担任。来自19个国家和有关国际研究机构的156人参加了讨论会。有30名代表在全体会议上作了报告,依次为:     

巴戟天病虫害座谈会纪要

福建省南药科研协作组于一九七七年五月五日至十一日,在南靖县和溪公社召开了巴戟病虫害座谈会。参加这次会议的有高等院校、科研单位、省医药公司和有关地(县)科委、商业局、医药站、医药公司、供销社和社队等共18个单位46名代表。会议由福建林学院主持。     

第三届现生和化石轮藻国际学术讨论会论文集——2000年10月16-19日,南京

Science Press,Beijing,2 0 03序第三届现生和化石轮藻国际学术讨论会于 2 0 0 0年 1 0月 1 6日至 1 9日在中国南京召开 ,来自世界各地的 30余位轮藻学者参加了会议 ,本期的《微体古生物学报》专辑即为这次轮藻学术讨论会的论文集。轮藻国际学术讨论会每四年召开一次 ,第一、第二届国际学术讨论会分别在欧洲 (法国 )和美洲 (美国 )召开 ,会议宗旨在于促进轮藻植物多学科交叉研究及加强各国同行间的学术交流。本专辑收录的论文源于南京国际学术讨论会上交流的系列学术报告 ,这些报告集中反映了各国学者对现生和化石轮藻植物研究的最新进展 …     

从国际生物工程第二届讨论会(Biotech)看生物工程进展(会议报告)

(Ⅰ)会议概况 第二届国际生物工程讨论会(Biotech—84)在美国华盛顿于九月十日到十二日召开。参加会议的各国代表约八百人,我国参加的代表有五人。会议报告的内容丰富,印有九百多页的论文集一册,共有七十多篇论文。报告可概括为三个方面: 1.生物工程商业——包括生物工程对工业和社会的冲击,从冒险到效益,集资问题、市场调节、专利、资源、新领域、各国政策—是合作还是冲突。     

第十二届国际食用菌科学与栽培会议简介

<正> 我有幸参加了1987年9月20—26日在联邦德国不伦瑞克(Braunschweig)举行的第十二届国际食用菌科学与栽培会议。这是由国际蘑菇协会(ISMS)主持,联邦德国农业研究院(FAL)具体组织的一次国际学术会议,是世界各国学者、科学家切磋学术、交流经验的一次盛会。出席这次会议的代表共500多人,分属于33个国家和地区。会上宣     

农用抗菌素4.896科研和应用工作会议

1977年9月7日至11日在山东益都,由中国科学院微生物研究所、山东省农业科学院和山东烟草研究所主持召开了4.896农用抗菌素(暂定名为多抗霉素)科研和应用工作会议。参加会议的有来自北京、山东、     

1981年国际单细胞蛋白会议

由国际微生物学会联合会(IUMS)和法国科学技术研究总代表团(DGRST)联合举办的国际单细胞蛋白会议,于1981年1月28—30日在巴黎召开。参加会议的有来自世界各国的代     

全国水稻花培科研协作会议在扬州召开

中国农业科学院于1980年11月19日至25日在江苏省扬州市召开了“全国水稻花培科研协作会议”。出席会议的有19个省(市、区)的有关科研机构、高等院校的专家、教授、科技人员共75人;会议收到了水稻花培育种科研方面的论文和资料90余篇;有25人在大会上作了报告和发言。     

用野生植物(田菁)蛋白制造蛋白胨(饲料)通过中试鉴定

从野生植物(田菁)蛋白制造蛋白胨(饲料)研究项目于1988年4月27日由商业部科学研究院主持在南京通过中试鉴定。参加会议的有高等学校、科研生产等单位的专家、教授及科技工作者共26人。会上由商业部南京野生植物研究所于学玲工程师做了“从野生植物(田菁)蛋白制造蛋白胨(饲料)”的研制报告,并提供了各项技术报告。与会代表一致认为:该项目选题正确,资料齐全,数据可靠。本研究对于利用野生植物科学地开发新蛋白资源,缓和鱼粉等高精蛋白紧张状况,具有较大的社会效益和经济效益。在科学地利用田菁胶工业下脚料作蛋白饲料     

第四届全国菌根学术会议

第四届全国菌根学术会议于1984年3月5日至3月8日在四川省重庆市中国农科院柑桔研究所召开。参加会议的有来自全国18个省、市、自治区的科研、高等院校、农、林科研等单位的69名代表。会议由中国微生物学会副理事陈华癸教授、农业微生物专业委员会主任樊庆笙教授主持,农业微生物专业委员会全体委员参加了会议。这次大会收到学术研究论文、报告、文献综述共36篇。这些论文、报告反映了我国     

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.