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。     

吉林省异爪蝗属一新种(直翅目:蝗总科)

作者在整理生物系动物标本室蝗虫标本时,发现异爪蝗属一新种,现报道如下。本文长度单位为mm。 左家异爪蝗Euchorthippus zuojianus新种 雄性:体型中等偏大。头顶向前倾斜,侧面观颜面向后倾斜。头侧窝明显,长方形,长为宽的3倍。颜面隆起较狭,两侧缘隆线明显,中央具纵沟。头预前缘近乎直角。头顶     

河南异距蝗属一新种：（直翅目：蝗总科）

本文记述采自河南省的异距蝗属一新种。模式标本存放于山东大学生物系无脊椎动物标本室。宽胸异距蝗Heteropernis latistena,新种(图1-4) 雄 体形较小。头较短于前胸背板。头顶宽平,向前倾斜,侧缘隆线明显。颜面侧观较直,颜面隆起在中单眼附近较宽且略低凹,其宽为上端最狭处的近2倍。头侧窝呈     

山西省异爪蝗属二新种（直翅目：网翅蝗科）

本文记述在晋南地区采到的异爪蝗属二新种,黑条异爪蝗Euchorthippus nigiliineatus sp.nov.及曲线异爪蝗Eochorthippus sinucarinatus sp.nov.     

山东省异爪蝗属一新种(直翅目,蝗总科,网翅蝗科)

记述采自中国山东省网翅蝗科异爪蝗属Euchorthippus Tarbinsky,1926 1新种,山东异爪蝗 Euchorthippus shandongensis sp. nov.。新种同素色异爪蝗 Euchorthippus unicolor(Ikonnikov,1913)近似,其区别特征为:头侧窝较长,长为宽的3.2倍;颜面隆起明显,具纵沟,中眼之下缩狭,往下明显宽大; 雄性前翅较长,明显超过肛上板基部;雄性下生殖板较短,侧面观长为宽的1.5倍; 阳茎基背片弓形深,两侧下端具尖突。模式标本保存于山东农业大学植保学院。     

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     

湖北省卵翅蝗属二新种（直翅目：斑腿蝗科）

本文记述在湖北省采到的蝗虫二新种,巴东卵翅蝗和湖北卵翅蝗,模式标本保存于山东大学生物系。     

中国佯越蝗属一新种记述（直翅目：蝗总科：斑腿蝗科）

本文记述采自中国江西省的佯越蝗属１新种──井岗山佯越蝗Ｐａｒａｔｏｎｋｉｎａｃｒｉｓｊｉｎｇｇａｎｇｓｈａｎｅｎｓｉｓ,ｓｐ．ｎｏｖ．模式标本保存于山东大学生物系。     

黑龙江省蝗虫─新种（直翅目：蝗科）

黑龙江省蝗虫─新种（直翅目：蝗科）张凤岭，郑一平，任炳忠（东北师范大学生物系，长春１３００２４）１９８９、１９９０年８月，作者在小兴安岭及周围地区进行了蝗虫调查。在整理鉴定标本时，发现异爪蝗属一新种。模式标本保存在东北师范大学生物系动物标本室。水边异...     

中国竹蝗属一新种（直翅目：蝗总科）

作在整理采自江西省的蝗虫标本时．发现竹蝗属一新种,现报道如下。模式标本保存于山东大学生物系无脊椎动物标本室．     

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.