褐卷蛾属二新种：鳞翅目：卷蛾科

褐卷蛾属Ｐａｎｄｅｍｉｓ中国已记录１８种,本文又记述２新种：条褐卷蛾Ｐａｎｄｅｍｉｓ ｓｔｒｉａｔａ ｓｐ．ｎｏｖ．及淡褐卷蛾ｐａｎｄｅｍｉｓ ｆｕｌｖａｓｔｒａ ｓｐ．ｎｏｖ．,至此我国已有２０种。     

中国新记录属——带小卷蛾属分类研究（鳞翅目：卷蛾科）

本研究首次发现带小卷蛾属Metacosma在我国分布,记述了采自安徽、湖南和贵州的2新种：三角带小卷蛾Metacosma triangulata,sp．nov．和梯形带小卷蛾Metacosma trapezia,sp．nov．。文中给出了新种的成虫及雄性外生殖器照片,编制了本属分种检索表。研究标本保存在南歼大学生命科学学院昆虫标本室。 1．三角带小卷蛾Metacosma triangulata,新种（图1,3） 翅展10．0mm。 正模：♂,安徽岳两（30．52°N,116．22°E）温泉,1995-Ⅷ-05,胡祥富采,玻片号ZAH04002。 本种与M.impolitana Kuznetsov相似,区别是：本种雄性外生殖器爪形突大,三角形,抱器端对称;而Mimpolitana Kuznetsov爪形突小,乳突状,抱器端不对称（左侧具5根粗刺,右侧6根）。 2．梯形带小卷蛾Metacosma trapezia,新种（图2,4） 翅展11．0mm。 正模：♂,湖南石门（27．34°N,110．01°E）壶瓶山南坪,504m,2002-Ⅴ-04,于海丽采,玻片号YHL0246。副模：1♂,贵州省道真县仙女洞,600m,2004-Ⅷ-17,肖云丽采;1♂,贵州江口黑湾,600m,2001-Ⅶ-27,李后魂,王新谱采。 本种与Mimpolitana Kuznetsov相似,区别是：本种爪形突梯形,抱器端对称;而坛impolitana Kuznetsov爪形突小,乳突状,抱器端不对称（左侧具5根粗刺,右侧6根）。本种与三角带小卷蛾Metacosma triangulata,sp．nov．的区别主要在爪形突形状上,本种爪形突为梯形,后者为三角形。     

中国梢小卷蛾属研究(鳞翅目:卷蛾科)

梢小卷蛾属Rhyacionia Hb.是专门为害松树嫩梢的钻蛀性害虫,是我国各地松林一大害。1973年作者在“蛾类图册”中记录了夏梢小卷蛾R. duplana(H(?)bner)(河北);1977年又在“中国经济昆虫志·卷蛾科(一)”中记录了松梢小卷蛾R. pinicolana(Dbld.)(东北、华北);在这次整理标本、资料时,又发现广泛分布在我国长江以南,为害马尾松梢的马尾松梢小卷蛾R. dativa Heinrich。近年来我国云南、四川两省云南松、思茅松、华山松、高山松上又发生一种梢小卷蛾,为害十分严重,其形态与松梢小卷蛾、马尾松     

中国齿卷蛾属的研究(鳞翅目:卷蛾科)

齿卷蛾属Ulodemis系Meyrick(1907)根据模式种trigrapha所建立。到目前为止、世界上总共记载有五个种,都分布在亚洲南部的印度、斯里兰卡和印度尼西亚境内的山地,而我国过去尚无分布记录。 近年来,作者从收集到我国福建、广东、四川、广西、云南等省小蛾类标本中发现这属一种和一新种。     

连小卷蛾属系统分类研究（鳞翅目：卷蛾科：新小卷蛾亚科）

本文对连小卷蛾属Nuntiella Kuznetsov进行了系统研究,共记述三个种研究,其中有两个新种：阔端连小卷蛾Nuntiella laticuculla sp. Nov.和狭翅连小卷蛾Nuntiella angustiptera sp. Nov.。首次描述了连小卷蛾属的雌性外生殖器特征。文中提供了成虫和外生殖器特征图及分种检索表。模式标本保存在南开大学生物系。     

原小卷蛾属分类研究(鳞翅目,卷蛾科,新小卷蛾亚科)

原小卷蛾属Sillybiphora Kuznetsov目前全世界仅知1种,中国已有记载.记述2种,包括1新种:微凸原小卷蛾S.pauliprotuberans sp.nov..文中给出了原小卷蛾属的分种检索表,提供了成虫图及外生殖器特征图.研究标本均保存在南开大学生命科学学院昆虫标本室.新种与庐原小卷蛾S.devia(Kuznetsov)在雄性外生殖器上相似,两者的主要区别是:新种基斑不明显,散布黑褐色条纹和斑点;端斑椭圆形且大,长与前翅宽约等宽;抱器腹近端部有一小的凸起,约为抱器瓣基部洞穴宽的1/10;抱器端端部膨大呈球状.庐原小卷蛾S.devia(Kuznetsov)基斑明显,黑褐色圆斑;端斑圆形且小,长约为前翅宽的2/3;抱器腹近端部有一大的凸起,与抱器瓣基部洞穴约等宽;抱器端端部无明显膨大,从基部到端部约等宽.     

拟顶小卷蛾属分类研究

本文系统研究了拟顶小卷蛾属Pseudacroclita Oku,共记述4种,除已知种拟顶小卷蛾P. hapalaspis (Meyrick)外,还有2个新种（突拟顶小卷蛾P. projecta sp. nov.和钩拟顶小卷蛾P. micrancistra sp. nov.）及1中国新记录种［黄斑拟顶小卷蛾P. luteispecula (Kuznetsov)］。提供了4个种的成虫照片和外生殖器特征图,给出了该属已知种的分种检索表。新种的模式标本保存在南开大学生物系。     

中国光卷蛾属三新种记述(鳞翅目:卷蛾科)

光卷蛾属(Aphelia Huebner 1825)是卷蛾科(Tortricidae)卷蛾亚科(Tortricinae)黄卷蛾族(Archipini)中的一个较小的属。全世界已知30种和2个亚种,隶属4个亚属。作者记录了中国5种,除已知的金光卷蛾Aphelia(Zelotherse)paleana(Huebner)(图1、6)和分光卷蛾Aphelia(Sacaphelia)disjuncta(Filipiev)(图2)外,还有3个新种记述如下。 全部标本包括模式种标本保存在中国科学院动物研究所昆虫标本馆。     

中国尖顶小卷蛾属系统学研究(鳞翅目,卷蛾科,新小卷蛾亚科)

尖顶小卷蛾属Kennelia全世界已知2种,中国均有分布.本文记录3种,包括1新种:凹尖顶小卷蛾K.apiconcava sp.nov..文中给出了尖顶小卷蛾属的分种检索表,提供了成虫图和外生殖器特征图.研究标本及模式标本均保存在南开大学生命科学学院昆虫标本室.新种与鼠李尖顶小卷蛾K.xylinana(Kennel)在雄性外生殖器上相似,两者的主要区别是:前者较后者个体小;爪形突末端凹陷呈"M"状,不膨大;尾突端部尖锐;抱器瓣颈部很细,约为抱器端宽的1/4;抱器端近圆形.鼠李尖顶小卷蛾K.xylinana(Kennel)个体较大;爪形突端部膨大,末端平截;尾突端部钝圆;抱器瓣颈部粗,约为抱器端宽的1/2;抱器端斜卵圆形.     

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