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1.
白头叶猴对夜宿石洞的选择   总被引:5,自引:0,他引:5  
白头叶猴(PresbytisLeucocephalus)栖息在广西南部的岩溶地形,夜里栖息在石洞里。白头叶猴选择夜宿石洞考虑的因素主要是安全和利于寻找食物等;出洞和入洞行为均在猴王的指挥下完成。  相似文献   

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黑叶猴繁殖小群的管理   总被引:3,自引:0,他引:3  
黑叶猴(Presbytisfrancoisi)属我国Ⅰ类保护动物,在动物园灵长目动物展出中占有独特位置。它代表了叶猴类动物的饲养方式。繁殖管理好黑叶猴,是物种保存计划中的一个重要内容。我们通过20多年的实践,不断完善繁殖种群管理措施,使第三代黑叶猴参...  相似文献   

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亚洲叶猴属(Presbytis)的颅骨研究   总被引:1,自引:0,他引:1  
本研究测量了亚洲叶猴8个种成年颅骨11项变量。通过童因子方差分析、多元统计分析包括差判别分析和由判别分析筛选的变量所组成的星状图等表明,亚洲叶猴能够明显地分成4个亚属;Kasi与Presbytis有更密切的关系。提出了不同于前人的线系分支图。  相似文献   

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带有PreS的重组乙肝表面抗原在毕赤酵母中的表达   总被引:6,自引:0,他引:6  
带有PreS区的乙肝表面抗原(HBsAg)有望成为新一代更高效的乙肝疫苗。利用毕赤属酵母(Pichia pastoris)表达系统,表达了带有PreS区免疫决定簇的理组乙肝表面抗原S1S、SS1和S2S。对表达产物的性质鉴定表明,产物可以形成2具有相应的S、PreS1或PreS2抗原性的颗粒,表达水平高于啤酒酵母(Saccharomyces cerevisiae)表达系统。  相似文献   

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西藏林芝真蚋亚属三新种(双翅目:蚋科)   总被引:3,自引:0,他引:3  
本文记述西藏林芝真蚋亚属Eusimulium三种:凸端真蚋Simulium(Eusimulium)concavustylumsp.nov.、林芝真蚋Simulium(Eusimulium)lingziensesp.nov.、裂缘真蚋Simulium(Eusimulium)schizolomunsp.nov 。  相似文献   

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研究了中国金小蜂科、金小蜂亚科的瘿蚊金小蜂属Propicroscytus Szelenyi,1941,重新描述了中国分布的2个种:斑腹瘿蚊金小蜂Propicroscytus mirificus(Girault)及斑腹金小蜂Propicroscytus oryzae (Subba Rao),编制了中国瘿蚊金小峰属分种检索表。其中,斑腹瘿蚊金小蜂Propicroscytus mirificus (Gi  相似文献   

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朱相云  葛颂 《植物研究》1995,15(4):441-443
本文考证了五加属学名,支持废弃不合法名称AcanthopanaxMiq.,强调应用合法名称EleutherococcusMaxim,在此基础上,将Acantlhopanax属名下2种及1变种并入Eleutherococcus属名,并对Eleutherococcus属的4个异名作了订正。  相似文献   

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熊科(Ursidea)动物世界上共有6个属,我国的熊科动物仅包括3个属,即棕熊属(Ursus),黑熊属(Selenarctos)和马来熊属(Helarctos)。其中,棕熊Ursusarctos全球共分9个亚种,我国有4个亚种:普通棕熊U.a.arc...  相似文献   

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中国柳属多雄蕊类群的分支系统学研究   总被引:1,自引:0,他引:1  
张明理 《植物研究》1994,14(3):299-305
应用杨属(Populus)和钻天柳属(Chosenia)分别作为不同的外类群,对中国柳属多雄蕊类群构建了两个分支图.结果表明,钻天柳属、大叶柳和四子柳组(Sect.Tetraspermae)都是较原始的类群.支持建立ToisusuKimura属.根据分支图和染色体数目资料,多雄蕊类群可划分五个类组.支持方振富教授关于“南方型”和“北方型”的划分以及在东亚有从南方向北方演化的趋势,特别对于中国特有组紫柳组(Sect.Wilsonianae).Sect.Salix和Sect.Subalbae两组的分化应予以承认.  相似文献   

10.
乳酸乳酸球菌基因表达调控研究进展   总被引:2,自引:1,他引:1  
还连栋   《微生物学通报》1996,23(5):299-306,311
乳酸乳酸球菌基因表达调控研究进展还连栋(中国科学院微生物研究所,北京100080)乳酸球菌属(Lactococcus)包括5个种,其中乳酸乳酸球菌(Lactococcuslactis)是最典型的一个种。乳酸乳酸球菌以前被称之为乳酸菌或N群链球菌(St...  相似文献   

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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.  相似文献   

16.
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.  相似文献   

17.
Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.  相似文献   

18.
正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases  相似文献   

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