中国原(虫怱)科一新种和(虫怱)科一新种(蜻蜓目)

记述采自广东省原科1新种:华氏齿原Prodasineura huai,sp.nov.和采自浙江省科1新种:大磐山斑Pseudagrion daponshanensis,sp.nov.,模式标本保存于浙江自然博物馆昆虫标本室。     

包氏扇(虫忽)雌性记述(蜻蜒目:扇(虫忽)科)

本文记述包氏扇螅的雌虫,标本采自广东省海南岛兴峰的自然保护区。包氏扇螅 Drepanosticta brownelli(Tinkham),(图1-5) 雌性:体长37毫米,腹部长(连肛附器)35毫米,后翅长24毫米。 头部黑色,上唇基方二分之一,前唇基、上颚基部和颊均为象牙白色,触角黄褐色。 前胸黄色,背面有X形黑纹。合胸黑色,后胸前侧片有一象牙白色条纹,覆盖气门,后胸后侧片有一象牙白色条纹。     

中国隼(虫忽)科二新种(蜻蜓目:隼(虫忽)科)

记述采自海南省太阳隼属1新种:华氏太阳隼Heliocyphahuai,sp.nov.和采自贵州省印度隼属1新种:赤水印度隼Indocyphachishuiensis,sp.nov.。模式标本保存于浙江自然博物馆昆虫标本室。     

老挝河(虫忽)Calopteryx laosica Fraser—中国新纪录

河螅属Calopteryx我国已知六种:C.atrata Selys.C.atrocyana Fraser, C.coomani Fraser,C.melli Ris. C.grandaeva Selys及C.virgo Linnaevs.1983年,笔者在云南省采得老挝河螅Calopteryxlaosica Fraser 5 3,这样我国的河螅属记录增至七种. 老挝河螅是Fraser 1933所发表,当时他仅根据采自老挝的1(Muang Chao,Laso, about 1100m April     

Mesopodagrion属一个种的异名(蜻蜒目:山(虫忽)科)

本文报道Mesopodagrion yachowensis Chao,1953是Mesopodagrion tibetanum Maclachlan,1896的异名。文中详细列举该种的文献目录。现知该种广布于我国东洋区的陕西、四川、云南和浙江等省。前人称该种分布于西藏省,经更正后知系四川之误,应将西藏除名。 Mesopodagrion tibetanum Maclachlan的文献目录如下: Mesopodagrion tibetanum Maclachlan     

中国原(虫怱)科一新种和(虫怱)科一新种(蜻蜓目)

记述采自广东省原[虫怱]科1新种：华氏齿原[虫怱]Prodasineura huai sp.nov.和采自浙江省[虫怱]科1新种：大磐山斑[虫怱]Pseudagrion daponshanensis,sp.nov.,模式标本保存于浙江自然博物馆昆虫标本室。     

常见(虫非)蠊及其防制

(虫非)蠊,通称蟑螂,昔有石薑、滑虫、茶婆虫、负盘、香娘子之称,它是属于节股动物门,昆虫纲,(虫非)蠊目的昆虫。世界已知的约有3,500种,国内现有的报告亦达百余种,但室内常见的种类不多,有凹缘大蠊,美洲大蠊,澳洲大蠊,德国小蠊和东方蠊等5种。它们能携带伤寒、痢疾、霍乱、结核等细菌和阿米巴原虫包囊,又能损坏工业品、家用品和食物,是医学上及经济上的重要害虫。因此我们要认识它、彻底消灭它。     

刺齿(虫兆)属温州—新种及浙江分种检索表(弹尾纲:长角(虫兆)科)

记述刺齿(虫兆)属温州1新种:六毛刺齿(虫兆) Homidia hexaseta sp.nov.,该种的鉴别特征包括体色,下唇具光滑毛L1,头背部顶区具6根大刚毛,胸部第Ⅱ节具p4系列大刚毛,腹部第Ⅲ节中间具a2大刚毛,腹部第Ⅳ节具B6和Ae5-7大刚毛以及端节亚顶端齿远大于顶端齿.同时,本文还给出了浙江省刺齿(虫兆)...     

广东省负泥虫一新种(鞘翅目: 负泥虫科)

记述采自广东省连县大东山的负泥虫 1新种 L ilioceris lianzhouensis sp.nov.,模式标本存中山大学昆虫研究所标本室。     

中国香港(虫)目昆虫以及管(虫)属的研究((虫)目)

根据近年来在香港地区采集到的一些虫目昆虫,经整理鉴定及文献记录,记述香港虫目昆虫3科6属9种,其中有1新种树基管虫Sipyloidea shukayi, sp. nov..制定了分类检索表,结合新种的鉴别,整理了全国管虫属Sipyloidea 已知种,制定出8个种的检索表.新种模式标本保存在中国科学院上海昆虫研究所.     

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