中国扁蜂科两新种(膜翅目,树蜂亚目,扁蜂科)

记述中国扁蜂科2新种:黄褐阿扁蜂 Acantholydaxanthiana Wei et Niu,sp.nov.和黑胫腮扁蜂 Cephalcia nigrotibialisWei,sp.nov..新种模式标本保存于中南林业科技大学昆虫模式标本室.黄褐阿扁蜂.新种 Acantholyda xanthiana Wei et Niu,sp.nov.(图1～5)本种与缅甸分布的 Acantholyda birmanica Shinohara et Benes,2005很近似,但各足股节、腹部背板无黑斑,前后翅端部深烟褐色,前翅翅痣下侧具1条短且狭窄的黑带,翅痣黑色,周缘黄色,R1脉黑色,唇基前缘非常直,后颊脊非常弱,单眼后区长等于宽,触角第3节约等长于触角柄节和梗节之和,约3倍于第4节长,腹部背板具微弱刻纹,光泽很强.正模♀,安徽金寨天堂寨,1 220m,2006-05-02,牛耕耘.词源:新种种名的种加词xanthiana意为黄色的,指新种虫体黄色,无明显黑斑.黑胫腮扁蜂.新种 Cephalcia nigrotibialis Wei,sp.nov.(图6～8)本种与Cephalcia tienmua Maa,1949最近似,区别为:本种触角第3节等长于第1节,2倍于第4节长;各足股节和胫节全部黑色,触角端部6节黑色;翅痣黑色,端部无黄斑,翅基片白色,中胸前侧片具1个白斑;中胸小盾片长大于宽.正模♀,陕西周至楼观台,899 m,2006-05-25,杨青;副模1♀,河南内乡宝天曼,1 300～1 400m,2004-07-24,刘卫星.词源:新种种名的种加词由nigro-和tibialis组成,指其胫节全部黑色.     

齿背茧蜂属一新种(膜翅目:茧蜂科)(英文)

本文报道了采自云南的齿背茧蜂属 Acanthormius Ashmead一新种 :双色齿背茧蜂 A.bicolor sp.nov.。模式标本保存于福建农业大学益虫研究室     

河南省锤举腹蜂属研究(膜翅目,举腹蜂科)

报道采自河南省的锤举腹蜂属3新种：白跗锤举腹蜂Pristaulacus albitarsatus sp.nov．，黑足锤举腹蜂Pristaulacus memnonius sp nov.，脊锤举腹蜂Pristaulacus porcatus sp．nov．和1已知种：喀锤举腹蜂Pristaulacus karinulus Smith，2001。标本保存在国家林业局森林病虫害防治总站标本馆。     

云南小腹茧蜂属一新种记述（膜翅目：茧蜂科，小腹茧蜂亚科）

本记述采自云南昆明的小腹茧蜂属Microgaster Latreille一新种,云南小腹茧蜂Microgaster yunnanensis Xu et He,sp nov．     

中国扁叶蝉属二新种(同翅目,叶蝉科)

记述扁叶蝉属2新种,黄斑扁叶蝉Penthimia fulviguttata sp.nov和茂兰扁叶蝉Penthimia maolanensis sp.nov,模式标本保存在贵州大学昆虫研究所。     

中国蠊泥蜂属一新种记述(膜翅目:蠊泥蜂科)

记述采自云南的蠊泥蜂科Ampulicidae蠊泥蜂属Ampulex l新种;扁唇蠊泥蜂Ampulex clypecomplana Chen et Li,sp.nov.,并与近似种Ampulex dissector(Thunberg,1822)作了比较。模式标本保存在云南农业大学昆虫标本室。     

中国犁瘿蜂属(膜翅目,瘿蜂科,梨瘿蜂族)分类研究及三新种记述

记述中国瘿蜂科犁瘿蜂属Diplolepis Geoffroy 5种,其中包括3新种,即黄腹犁瘿蜂Diplolepis flaviabdomenis sp.nov.,湖南犁瘿蜂Diplolepis hunanensis sp.nov.和小腹犁瘿蜂Diplolepis mnoriabdomenis sp.nov..详细描述新种并附图,编制了中国犁瘿蜂属分种检索表.模式标本保存于浙江农林大学和美国东伊利诺伊大学生物系寄生蜂标本室.     

锤角细蜂亚科中国一新纪录属及一新种记述（膜翅目：锤角细蜂科）

记述锤角细蜂科中国及东洋区1新纪录属:扁锤角细蜂属Pentapria Kieffer,1905,并描述采自云南的1新种:中华扁锤角细蜂Pentapria sinica sp.nov.。提供了形态描述、特征图以及新种与分布于古北区相似种类的鉴别检索表。模式标本保存于华南农业大学膜翅目标本室(SCAU)。     

中国三节茧蜂属Acampsis Wesmale记述(膜翅目:茧蜂科:屏腹茧蜂亚科)

三节茧蜂属Acampsis Wesmael是屏腹茧蜂亚科中的1个小属,全世界仅知1种。本文新添在我国发现的2个新种:中华三节茧蜂A.chinensis sp.nov.(陕西)和湖南三节茧蜂A.hunanensis sp.nov.(湖南)。这是本属在我国的首次发现,也是在东洋区的首次报道。     

中国叉齿细蜂属网腰细蜂种团二新种记述(膜翅目:细蜂科)

记录我国叉齿细蜂属Exallonyx叉齿细蜂亚属Exallonyx网腰细蜂种团dictyotus-group2新种:采自陕西和浙江的黑唇叉齿细蜂Exallonyxnigrolabius,sp.nov.和采自贵州的短脊叉齿细蜂Exallonyxbrevicarinus,sp.nov.。模式标本保存于浙江大学寄生蜂标本室。     

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.     

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     

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.