六盘山地区雏蝗属一新种——直翅目:蝗总科

在鉴定宁夏农学院送检的宁夏地区蝗虫标本时,发现有雏蝗属一新种,现记述如下。模式标本保存于陕西师范大学生物系蝗虫研究室。 红胫雏蝗Chorthippus rufitibis新种(图1—4) 雄虫 体中型。头顶三角形,较平,具中隆线,侧缘隆线明显。头侧窝长约为宽的2—2.6倍。颜面侧观向后倾斜,颜面隆起在触角基部之下具明显的纵沟,侧缘在中央单眼     

吉林省蝗虫一新种（直翅目：丝角蝗科）

1987年7～8月,作者在吉林省西部草原进行调查时采到的蝗虫,经鉴定整理,发现雏蝗属一新种,现报导如下。模式标本保存在东北师范大学生物系动物标本室。     

辽宁省蝗虫一新种（直翅目：斑腿蝗科）

本文记述斑腿蝗科豫蝗属一新种：清原豫蝗Ｙｕｐｏｄｉｓｍａ ｑｉｎｇｙｕａｎａ ｓｐ．ｎｏｖ．,采自辽宁省清原县,模式标本保存于东北师大生物系动物标本室。     

浙江卵翅蝗属一新种（直翅目：蝗总科：斑腿蝗科）

记述在浙江省开化县古田山自然保护区采到的卵翅蝗属１新种：浙江卵翅蝗Ｃａｒｙａｎｄａ ｚｈｅ ｊｉａｎｇｅｎｓｉｓ,ｓｐ．ｎｏｖ．。模式标本保存在陕西师范大学动物研究所和杭州师范学院生物系动物标本室。     

中国金色蝗属一新种(直翅目：蝗总科)

作者在整理生物系标本室蝗虫标本时,发现金色蝗属一新种,现报道如下。模式标本保存于东北师范大学生物系动物标本室。 呼盟金色蝗 Chrysacris humengensis新种(图1—3) 雌虫:体中型,较粗壮。头顶短,其长度小于复眼前最宽处的2倍,具中隆线;缺头侧窝;颜面倾斜与头顶形成锐角。颜面隆起明显,在中单眼之下具浅纵沟。触角狭剑状,超     

横断山蝗虫一新属(直翅目:蝗科, 锥头蝗亚科)

Mekongiella是Kevan(1966)由Mekongiana属分离出来的新属。印象初(1984)把该属提升为新亚科Mekongiellinae。该亚科目前仅知1属即Mekongiella属,主要特征为完全无翅,缺鼓膜器、发音器和摩擦板。 作者在整理横断山标本时,发现采自云南中甸县的2只标本,完全无翅,缺发音器和摩擦板等特征,近似于Mekongiella属,但具明显的鼓膜器,却又近似于Mekongiana属,而雄性生殖器也有别于已知属,故另成立一新属。 模式标本存放在中国科学院动物研究所。 拟澜沧蝗Paramekongiella新属     

青海省雏蝗属一新种记述：（直翅目：蝗总科：网翅蝗科）

在整理由青海省采得蝗虫标本时,发现1新种,记述如下。模式标本保存于山东大学生物系。青海雏蝗Chorthippus qinghaiensis,新种(图1—8) 雄:体小型。头部短于前胸背板。头顶平,侧缘明显隆起,顶锐角形。头侧窝狭长方形,长为宽的3.3倍。颜面向后倾斜,颜面隆起纵沟较浅,具刻点,侧缘在中眼处略狭。触角丝状,中段一节长为宽的1.4倍。复眼较小,卵圆形,纵径为横径的1.3倍,     

黑龙江省雏蝗属一新种：（直翅目：蝗科）

作者于1989年8月间在黑龙江省克山进行了蝗虫调查。标本经整理鉴定,发现雏蝗属1新种。模式标本保存在东北师范大学生物系动物标本室。克山雏蝗Chorthippus keshanensis,新种(图1-5) 雄性:体小型。头部较大,头侧窝明显,长方形,长为宽的2.8倍。颜面侧观向后倾斜,同头顶组成锐角,颜面隆起具纵沟,向下逐渐宽平。复眼卵形,纵径为横径的1.4倍,为眼下沟长的1.1倍。触角丝状,超过前胸背板后缘,中段一节长约为宽的1.8倍。前胸背板前缘近平直,后缘弧形;中隆线明显,侧隆线在沟前区向内弧形弯曲,沟     

吉林省异爪蝗属蝗虫一新种（直翅目：蝗总科）

报道了采自吉林省长岭县的异爪蝗属Euchorthippus一新种,即长岭异爪蝗E.changlingensis sp.nov.,并与其近似种做了比较,模式标本保存于东北师范大学生命科学学院生物系动物标本室。     

甘肃省雏蝗属一新种记述（蝗总科：网翅蝗科）

本文记述了雏蝗属一新种：短角雏蝗（Ｃｈｏｒｔｈｉｐｐｕｓｂｒｅｖｉｃｏｒｎｉｓｓｐ．ｎｏｖ．,采自甘肃省肃南县宝瓶河牧场。模式标本存于陕西师范大学动物研究所。     

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.     

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