广西大瑶山地区蚱科的新种（直翅目：蚱总科）

本记述采自广西大瑶山地区蚱科昆虫三新种,即拟仿蚱Tetriz simulanoides sp．nov、广西蚱Tetrix guangxiensis sp．nov及短背真长背蚱Euparutetzix brachynotus sp.nov。     

中国蚱属二新种记述(蚱总科:蚱科)

记述采自云南省蚱属昆虫二新种,即南贡山蚱（Tetrix nangongshanensis sp．nov．）及大理蚱（Tetrix daliensis sp．nov）。模式标本保存于陕西师范大学动物研究所昆虫标本室。     

广西蚱总科三新种 （直翅目）

 记述采自广西大青山地区蚱总科昆虫3新种,即黑胫狭蚱 Xistra nigritibialis sp.nov.,横斑柯蚱 Coptotettix transimaculatus sp.nov. 及拟齿股蚱 Tetrix serrifemoroides sp.nov.。     

中国蚱属一新种记述（直翅目：蚱科：蚱亚科）

记述蚱属1新种:苍山蚱Tetrix cangshanensis sp.nov.,提供了新种的形态特征照片图.苍山蚱Tetrix cangshanensis sp.nov.与拟二斑蚱T.parabipunctata Zheng&Ou,2004和二斑蚱T.bipunctata(Linnaeus,1758)相似,但以直的颜面隆起,较高的触角着生位置和直的前胸背板前缘区别于后二者,同时以较短的后翅区别于拟二斑蚱;还以较狭的颜面隆起纵沟,向内收缩的沟前区侧隆线和波曲的中足股节下缘区别于二斑蚱.     

云南省蚱科四新种记述(直翅目:蚱总科)

记述采自云南省西双版纳及大理苍山地区蚱科4新种,即狭顶庭蚱Hedotettix strictivertex sp.nov.,版纳柯蚱Coptotettix bannaensis sp.nov.,长翅蚱Tetrix longipennis sp.nov.及勐仑悠背蚱Euparatettix menlunensis sp.nov.。模式标本保存于陕西师范大学动物研究所昆虫标本室。     

四川省蚱总科二新种记述(直翅目)

记述采自四川省雅安地区蚱总科昆虫,发现2新种,四川佯鳄蚱Paragavialidium sichuanensis sp.nov.及拟短背蚱Tetrix parabrachynota sp.nov.模式标本保存于河北大学博物馆.     

广西北部地区蚱总科七新种记述(直翅目)

记述采自广西北部蚱总科昆虫7新种,即黑股羊角蚱Criotettix nigrifemurus,sp．nov．,横刺羊角蚱Criotettix transpinius,sp．nov．,拟圆头波蚱Bolivaritettix circocephalosoides．sp．nov．,宜州蚱Tetrix yizhouensis,sp．nov．,丘背蚱Tetrix cliva,sp．nov．,白条悠背蚱Euparatettix albostriatus,sp．nov．及九万山悠背蚱Euparatettix jiuwanshanensis,sp．nov．。模式标本保存于陕西师范大学动物研究所昆虫标本室。     

广西蚱总科三新种（直翅目）

记述采自广西大青山地区蚱总科昆虫3新种,即黑胫狭蚱 Xistra nigritibialis sp.nov.,横斑柯蚱 Coptotettix transimaculatus sp.nov. 及拟齿股蚱 Tetrix serrifemoroides sp.nov.。     

广西西北部布柳河地区蚱总科四新种记述(直翅目:蚱总科)

本记述采自广西布柳河地区蚱总科昆虫4新种,即拟宽股庭蚱Hedotettix latifemoroides．sp．nov．,拟瘤背蚱Tetrix torulosinotoides,sp．nov．,平缘蚱Tetrix rectimargina,sp．nov．及拟黑背悠背蚱Euparatettix pseudomelanotus,sp．nov．此外还首次记述短翼蚱科波蚱属的二种雌性及一种雄性,即荔波波蚱Bolivaritettix liboensis Zheng et al,黄条波蚱Bolivaritettix luteolineatus Zheng et al及圆肩波蚱Bolivaritettix circimhumerus Zheng,模式标本保存于陕西师范大学动物研究所标本室。     

我国蚱科一新属二新种记述（直翅目：蚱总科）

本文记述采自广西和吉林省蚱科一新属二新种．即拟真长背蚱属Euparatettixoides gen.nov.,广西拟真长背蚱Euparatettixoides guangxiensis sp.nov.及粗瓣蚱Tetrix grossovalvus sp.nov.。     

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.     

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     

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.     

Entwicklungsgeschichte und Ultrastruktur von Pollenkitt und Exine bei nahe verwandten entomophilen und anemophilen Angiospermensippen derAlismataceae,Liliaceae, Juncaceae,Cyperaceae, Poaceae undAraceae

Some closely related members of the monocotyledonous familiesAlismataceae, Liliaceae, Juncaceae, Cyperaceae, Poaceae andAraceae with variable modes of pollination (insect- and wind-pollination) were studied in relation to the ultrastructure of pollenkitt and exine (amount, consistency and distribution of pollenkitt on the surface of pollen grains). The character syndromes of pollen cementing in entomophilous, anemophilous and intermediate (ambophilous or amphiphilous) monocotyledons are the same in principal as in dicotyledons. Comparing present with former results one can summarize: 1) The pollenkitt is always produced in the same manner by the anther tapetum in all angiosperm sub-classes. 2) The variable stickiness of entomophilous and anemophilous pollen always depends on the particular distribution and consistency of the pollenkitt, but not its amount on the pollen surface. 3) The mostly dry and powdery pollen of anemophilous plants always contains a variable amount of inactive pollenkitt in its exine cavities. 4) A step-by step change of the pollen cementing syndrome can be observed from entomophily towards anemophily. 5) From the omnipresence of pollenkitt in all wind-pollinated angiosperms studied one can conclude that the ancestors of anemophilous angiosperms probably have been zoophilous (i.e. entomophilous) throughout.

     

Identification and Characterization of the First Equine Parainfluenza Virus 5

正Dear Editor,Parainfluenza virus 5 (PIV5), known as canine parainfluenza virus in the veterinary field, is a negative-sense,nonsegmented, single-stranded RNA virus belonging to the Paramyxoviridae family (Chen 2018). The virus was first reported in primary monkey kidney cells in 1954 (Hsiung1972), then it has been frequently discovered in various