山西庞泉沟保护区原麝的一些生态资料

1982—1987年,我们在山西庞泉沟国家级自然保护区,对原麝(Moschug moschiferus)的数量现状及其保护进行了初步调查,现报道如下:工作区与方法本区位于山西省吕梁山脉中段,地处交城和方山两县交界,东经111°22′—111°33′,北纬37°45′—37°55′。全区总面积为10,443.5公顷。主峰关帝山海拔2830m。森林主要以华北落叶松(Larix principis-rupprechtii)为代表的针叶林和针阔混交林,覆盖度74%。林外沙棘(Hippophae rhamnoides)、黄刺玫(Rosa xanthina)、绣线菊(Spiraea alpina)和灰栒子(Cotoneaster acutifolus)等灌丛。调查方法采用:一、…     

大风口水库及石河生态条件与鱼类群落的研究

1987—1989年间对大风口水库及上下游石河的不同河段进行了春夏秋不同季节的生态环境和鱼类群落的调查研究。一、生态条件1.自然概貌和采样段面的选择石河是辽宁西部的一条直接入海的小河,全长67.7km,流域面积431km~2。地理座标为北纬40°10′—40°19′,东经119°50′—120°     

西双版纳白颊长臂猿的观察

白颊长臂猿(Hylobatesleucogenys)自Ogilby(1840)以泰国标本订名后,曾被视为独立种(Elliot,1912;Allen,1938)。1951年,Ellerman&Morrison-Scott将其合并为黑长臂猿的一个亚种,马世来、王应祥(1986)将H.leucogenus与H.concolor进行详细比较后,又将白颊长臂猿分为独立种。白颊长臂猿在西双版纳的分布,早在六十年代就有记载(寿振黄1959;高耀亭1962),但就其资源的数量问题,直到1983—1984年才开展全面考察,为保护濒危动物提供了重要的依据。栖息环境白颊长臂猿在我国分布于东经101°06′—10l°50′,北纬20°07′—22°09′的热带阔叶林间。…     

我国金花茶组植物的地理分布

世界产金花茶组植物22种,其中我国20种,特有18种,仅产广西。其分布区在北纬21°30′—23°40′,东经106°40′—108°35′,北界基本上与广西北热带半常绿季雨林、湿润雨林地带北界吻合。该组植物分布于石灰(岩)土的13种,红壤的7种。它们出现的地段比较固定,天然林下,沟谷或溪边处,相对高度10—15米;峰丛圆洼地底部和荫蔽的坡面下部。该组植物个体最多的地区(几何中心)一个在防城县,一个在龙州县;种类最多的地区(最大变异中心)一个也在龙州县,9种,一个在扶绥县,7种。该分布区从南到北分化成六个小分区。其垂直分布一般在海拔700米以下。水平分布种的更替表现为:北纬21°31′为小瓣金花茶等五种;北纬22°10′—22°45′为鼻岗金花茶等八种更替;北纬22°50′为顶生金花茶等三种更替;北纬23°40′为平果金花茶更替。金花茶分布幅度最宽,可由北纬21°31′到22°55′。在土山,东西以东经107°30′为界,以东为金花茶等四种,以西为小瓣金花茶等二种。     

神农架的部分大型真菌

(一)基本特征湖北省西部的神农架地区,位于东经109°56′—110°58′,北纬31°15—31°57′之间。地处我国亚热带向北温带过渡地带,又是东部低山丘陵区向西部高山区过渡区域。神农架系大巴山之余脉,最高的无名峰     

江苏盐城沿海越冬丹顶鹤的数量和分布动态

丹顶鹤(Grusjaponensis)是世界大型珍贵涉禽,目前仅剩1000余只,繁殖在我国东北、苏联阿穆尔省及日本北海道。越冬在我国长江中下游和朝鲜半岛。联合国保护野生动物的世界组织(ICUN)将它列入濒危物种红皮书,我国将它列为一类保护动物。盐城沿海滩涂是我国丹顶鹤的主要越冬地。盐城市环保局和盐城自然保护区于1982年至1986年10—3月对当地丹顶鹤越冬期数量分布进行了连续五年调查,获得下列初步结果。一、自然概况盐城沿海滩涂分属响水、滨海、射阳、大丰、东台五县,为江、淮、黄冲积平原。地理位置在东经119°48′—120°56′,北纬32°38′…     

白眉[姬]鹟生态的初步研究

1986—1988年的5—8月,在山西庞泉沟国家级自然保护区的白眉[姬]鹟(Ficedula zanthopy(?))的迁徙期在5月中旬和8月上旬。种群数量为1.40(只/公里)。其繁殖行为营巢期8—9天,孵卵期12—13天,孵化率93.75％,出巢率91.67％。剖检56个鸟胃,内含全为昆虫。我们于1986—1988年5—8月,在山西庞泉沟国家级自然保护区对白眉[姬]鹟(Ficedula zanthopyia)的生态进行了初步研究。本区位于山西省吕梁山脉中段(东经111°21′—111°33′,北纬37°45′—37°55′,总面积10443.5公顷)。     

褐马鸡饲养繁殖的一些资料

褐马鸡(Crossoptilon mantchuricum)是我国一类保护动物,而庞泉沟为保护褐马鸡的国家级自然保护区。保护珍稀濒危动物,除划定自然保护区管理保护之外,开展就地人工饲养繁殖,为进一步研究褐马鸡的生态和生物学以及人工驯化提供科学依据,并可探讨放还大自然的途径,在理论和实践方面均具有一定意义。有关褐马鸡就地人工饲养,张兆海(1983)曾有报道,但尚未解决繁殖问题。我们于1984～1986年就地人工饲养繁殖连续三年成功。现报道如下:一、笼舍庞泉沟自然保护区位于山西省吕梁山中段,地处东经111°22′—111°33′,北纬37°45′—37°55′,海拔16…     

建立生态经济型橡胶园橡胶咖啡间作模式

一、云南植胶区的自然地理条件云南橡胶种植区位于云南高原南部,北纬20°09′—24°59′,东经93°31′—105°08′,海拔100—1000m之间的热带季风地区。包括文山、红河、思茅、西双版纳、临沧和德宏地区     

芦芽山自然保护区鸟类垂直分布

为有计划地保护和利用芦芽山自然保护区的鸟类资源提供科学依据,1980年7～9月和1984年3～9月,对本区鸟类进行了初步调查,现将结果报道如下:芦芽山自然保护区地处吕梁山系北部,东经111°50′～112°5′,北纬38°35′～38°45′。主峰芦芽山海拔2772米。本区山峦重叠,沟谷交错,森林密布。主要树种有云杉(Picea spp.)、油松(Pinus tabulaeformis)、白桦(Betula platyphylla)、华北落叶松(Larix principis-rup-rechtii)及辽东栎(Quercus liaotung-gensis)等。年均温3～5℃,1月均温零下15～21℃,7月均温15℃左右。年降水量500～700毫米。无霜期…     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

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     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

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.     

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.     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.     

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