云南杵蚊亚属一新种（双翅目：蚊科）

记述采自西双版纳景洪县杵蚊亚属一新种,长管杵蚊Tripteroides(s.str)longisipphonus sp.nov.。模式标本保存在云南省疟疾防治研究所。     

中国蓝带蚊属一新种(双翅目,蚊科)

记述采自云南省景东县境内树洞积水中蓝带蚊属1新种,云南蓝带蚊Uranotaenia(Uranotaenia)yunnanensis sp.nov.,讨论了新种与相似种的鉴别特征.模式标本存于云南省寄生虫病防治所.     

长须杵蚊雌蚊的描述(双翅目:蚊科)

长须杵蚊Ｔｒｉｐｔｅｒｏｉｄｅｓ(Ｒａｃｈｉｏｎｏｔｏｍｙｉａ)ｌｏｎｇｉｐｌｐｉｓＤｏｎｇ,ＺｈｏｕｅｔＤｏｎｇ,1997系董学书等采自云南省西双版纳的雄蚊、蛹及幼虫描述,最近又采获一批幼虫,经饲养获雌、雄各3只,雌蚊描述如下。长须杵蚊Ｔｒｉｐｔｅｒｏｉｄｅｓ...     

领蚊属一新种（双翅目：蚊科）

记述采自云南省腾冲县竹筒积水内领蚊1新种,以采获地命名为腾冲领蚊Heizmannia(Heizmannia）tengchongensis sp.nov.,讨论了新种与近缘种的鉴别特征。模式标本保存于云南省疟疾防治研究所。     

领蚊属一新种(双翅目:蚊科)

记述采自云南省西双版纳勐腊县境内竹筒积水领蚊亚属1新种,讨论了新种与近缘种的鉴别特征。模式标本存于云南省寄生虫防治所。     

阿蚊属一新种(双翅目:蚊科)

记述采自云南省西双版纳小勐伦竹筒积水内阿蚊属1新种,讨论了新种与近缘种的鉴别特征。模式种保存于云南省寄生虫病防治研究所。     

局限蚊属一新种(双翅目:蚊科)

记述采自云南省思茅市南岛河芭蕉叶腋积水内局限蚊1新种,讨论了新种与近缘种的鉴别特征。模式种保存于云南省寄生虫病防治所。     

杵蚊一新种记述——双翅目:蚊科

新种杵蚊属杵蚊亚属,是我国首次记载的本亚属新种。 宽刺杵蚊Tripteroides(Rripteroides)latispinus新种(图1) 雌蚊 中型棕色蚊虫。头顶的大部、后头和头的两侧具平覆深褐色宽鳞,后部近头窍有少数黑色竖叉鳞;眼缘具银白鳞饰。唇基、触角,触须和喙暗色。触角梗节棕黄色,鞭节1内侧具少数淡色宽鳞。触须为喙的1/9长。喙长约为前足股节的1.2倍。前胸前背片平覆银白宽鳞;后背片棕黄色,上部具散生的平覆褐色宽鳞,下部光裸;侧板无鳞。中胸盾片一致平覆密致的棕色窄鳞;小盾片平覆褐色宽鳞;后背片光裸,暗褐色;侧背片光裸。气门鬃3—4根;前侧片上部黑色,气门下区有一个小白鳞簇;气门亚区、腹侧板上部和后下部、后侧片大部以及各足基节平覆银白宽鳞。翊:翅鳞暗色。足:暗色,各足股节前面都     

蓝带蚊属一新种（双翅目：蚊科）

记述采白云南省西双版纳景洪县竹筒积水内蓝带蚊属伪费蚊亚属1新种．讨论了新种与相似种的鉴别特征。模式标本保存于云南省寄生虫病防治研究所。     

云南蚊科三新种 （双翅目：蚊科）

记述了采自云南蚊科3新种,即：蓝带蚊属伪费蚊亚属一新种瞿氏蓝带蚊Uranotaenia (Pseudoficalbia) qui Dong, Dong et Zhou, sp. Nov.,采自西双版纳优乐山竹穴积水中,与新糊蓝带蚊Ur. Novobscura Barraud和二斑蓝带蚊Ur. Bimaculata Leicester近缘;领蚊属一新种类孟连领蚊Heizmannia (Heizmannia) menglianeroides Dong, Dong et Zhou, sp. Nov.,采自云南省景洪县森林竹筒积水中,与孟连领蚊Hz. Menglianensis Lu et Gong, 1986为近缘;库蚊属泰蚊亚属一新种陈氏库蚊Culex (Thaiomyia) cheniDong, Wang et Lu, sp. Nov.,采自云南西北部海拔1795 m的腾冲县竹筒积水,与海南库蚊Cu. (Th.) hainaensis Chen, 1977近缘。讨论了各新种与近缘种的鉴别特征。新种分别存放在云南省疟疾防治研究所和贵阳医学院微生物教研室。     

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     

Pathogenic Characterization and Full Length Genome Sequence of a Reassortant Infectious Bursal Disease Virus Newly Isolated in Pakistan

<正>Dear Editor,Infectious bursal disease (IBD) is one of the most important diseases of the poultry. The IBD virus (IBDV), a nonenveloped virus belonging to the Birnaviridae family with a genome consisting of two segments of double-stranded RNA (segments A and B), targets B lymphocytes of bursa of Fabricious leading to immunosuppression. In Pakistan,poultry farming is the second biggest industry and IBD is the second biggest disease threating the poultry sector.However, there is limited genome information of IBDV