河南省伏牛山蝎蛉记述：长翅目：蝎蛉科

本文报道了１９９６年７月河南省伏牛山昆虫考察中采到的蝎蛉科６种昆虫,其中蝎蛉属Ｐａｍｏｒ ｐａ４种,即大蝎蛉Ｐａｎｏｒ ｐａ ｍａｇｎａ Ｃｈｏｕ,六刺蝎蛉Ｐ．ｓｅｘｓｐｉｎａ Ｃｈｅｎｇ,华山蝎蛉Ｐ．ｅｍａｒｇｉｎａｔａ Ｃｈｅｎｇ和伏牛山蝎蛉Ｐ．ｆｕｎｉｕｓｈａｎａ Ｈｕａ ｅｔ Ｃｈｏｕ,ｓｐ．ｎ。新蝎蛉属Ｎｅｏ ｐａｎｏｒ ｐａ２种,即河南新蝎蛉Ｎｅｏｐａｎｏｒ ｐａ ｌｏｎｇｉｐｒｏｃｅ     

蝎蛉属Panorpa东北一新种（长翅目：蝎蛉科）

本文描述产自中国东北辽宁和黑龙江的蝎蛉１新种－刘氏蝎蛉Ｐａｎｏｒｐａ ｌｉｕｉ,ｓｐ．ｎｏｖ．。模式标本保存在西北农业大学昆虫博物馆。     

蝎蛉属Panorpa一新种记述(长翅目:蝎蛉科)

记述采自河南省王屋山的蝎蛉属Panorpa Linn．1新种：王屋山蝎蛉Panorpa wangwushana,sp．nov．。模式标本分别保存在西北农林科技大学昆虫博物馆和郑州大学生物系。     

染翅蝎蛉Panorpa tincta Navas, 1931一新异名

经过长期调查，在秦岭山区获得大量标本的基础上，发现静蝎蛉Panorpa statura Cheng，1949是染翅蝎蛉Panorpa tincta Navas，1931的新异名。     

刘氏蝎蛉雌性生殖系统的构造

解剖并描述了刘氏蝎蛉Panorpa liui Hua的雌性生殖系统。结果表明,刘氏蝎蛉外生殖器包括下生殖板、内骨,内生殖器官包括卵巢、侧输卵管、中输卵管、附腺、受精囊以及生殖腔。每个卵巢由10~13根多滋式卵巢管组成,12根出现频率最高。     

扁蚊蝎蛉的行为学观察

通过室内饲养和观察,记述了扁蚊蝎蛉Bittacus planusCheng成虫捕食过程、雌雄交配和产卵行为。捕食过程分准备、捕捉、取食和清洁等4个步骤。观察到了雄虫的献礼行为,雌虫边取食边交配。存在有自相残杀行为。     

蝎蛉科与蚊蝎蛉科昆虫触角感器超微形态比较

触角是昆虫重要的感觉器官,其感觉功能主要是通过其上的各类感器来实现的。本文以染翅蝎蛉Sinopanorpa tincta(Nav偄s)和中华蚊蝎蛉Bittacus sinensis Walker为代表,采用扫描电子显微镜观察了蝎蛉科Panorpidae和蚊蝎蛉科Bittacidae触角感器的类型及其超微结构,并简要讨论了各种感器的功能。结果显示:染翅蝎蛉触角上共发现7种感器,分别为短刺形感器、Bhm氏鬃毛、毛形感器、短毛形感器、锥形感器、刺形感器、和微毛形感器。中华蚊蝎蛉触角上也发现7种感器,分别为Bhm氏鬃毛、芽形感器、毛形感器、刺形感器、畸形毛感器、腔锥感器和钟形感器。蚊蝎蛉触角与蝎蛉的最大区别是着生有大量的腔锥感器,初步推测众多的腔锥感器可能与蚊蝎蛉对湿度的高度敏感有关。     

中国东北晚侏罗世蝎蛉化石研究

本文描述蝎蛉化石１新属４新种。新属Ｍｅｇａｂｉｔｔａｃｕｓ２新各,即Ｍｅｇａｂｉｔａｃｕｓ ｃｏｌｏｓｓｅｕｓ ｓｐ,ｎｏｖ。,Ｍｅｇａｂｉｔｔａｃｕｓ ｂｅｉｐｉａｏｅｎｓｉｓ ｓｐ,ｎｏｖ,新种Ｓｉｂｉｒｏｂｉｔｔａｃｕｓ ａｔａｌｕｓ ｓｐ,ｎｏｖ,属于现生的蚊蝎蛉科,新种Ｏｒｔｈｏｐｈｌｅｂｉａ ｌｉａｏｎｉｎｇｅｎｓｉｓｓｐ,ｎｏｖ,属于绝灭的直脉蝎蛉科。化石采于辽宁省北票我侏罗世义县级     

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