中国新记录的隐粉蛉属及一新种记述：（脉翅目：粉蛉科）

隐粉蛉属Cryptoscenea在囊粉蛉亚科(Aleuropteryginae)中是比较特殊的,其前翅中脉上缺少一般均具有的2个脉鬃。Enderlein 1914年以其1906年所描述的Helicoconis australiensis作为模式种建立了此属,至今只记载有5个种,除1种在新几内亚外,其余均分布在澳洲,本文系此属在我国的首次纪录,并增加1新种。所有模式标本均保存在北京农业大学昆虫标本室。     

云南省粉蛉两新种记述（脉翅目：粉蛉科）

记述云南省脉翅目粉岭科2新种：奇斑曲粉岭Coniocom psa spectabilis Liu et yang,sp.nov和丫重粉蛉Semidalis ypsilon Liu et Yang,sp.nov。。模式标本均保存在中国农业大学昆虫标本馆。     

粉蛉亚科中国二新记录属与二新种（脉翅目：粉蛉科）

本文报导粉蛉亚科Ｃｏｎｉｏｐｔｅｒｙｇｉｎａｅ中国２新记录属；匣粉蛉属ＴｈｅｃｏｓｅｍｉｄａｌｉｓＭｅｉｎａｎｄｅｒ和半粉蛉属ＨｅｍｉｓｅｍｉｄａｌｉｓＭｅｉｎａｎｄｅｒ及２新种：杨氏匣粉蛉Ｔ．ｙａｎｇｉＬｉｕ和中华半粉蛉Ｈ．ｓｉｎｅａｓｉｓＬｉｕ。模式标本保存于北京农业大学昆虫标本馆。     

粉蛉记(二)粉蛉属Conwentzia Enderlein(脉翅目:粉蛉科)

粉蛉属Conwentzia后翅极退化,仅为前翅长的一半或更小,为粉蛉亚科Coniopteryginae中较特化的一类,Enderlein将此属单独列为(虫齿)粉蛉族Conwentzini。我国此属粉蛉以前无记载,本文就北京农业大学收藏的标本记述了中华蜡粉蛉Conwentziasinica(陕西)、直胫(虫齿)粉蛉C.orthotibia(甘肃)和中越(虫齿)粉蛉C.fraternalis(广西)三个新种。第一种表示为我国本属的初次记录,第二种是指足上突出的特征,第三种则因标本采自中越边界的大青山顶,为了纪念中越人民的友谊而命名的。     

华东地区鱼蛉二新种（广翅目：齿蛉科）

本记述华东地区鱼蛉二新种,均为齿蛉科(Corydalidae)的鱼蛉亚科(Chaulioinae),江西斑鱼蛉(Neochauliodes jangxiensis Yang et Yang)采自祁禄山,灰翅栉鱼蛉(Ctenochauliodes Rriseus Yang et Yang)采自黄山,模式标本均保存在北京农业大学昆虫标本室.     

中国北方粉蛉新种及新记录 (脉翅目：粉蛉科)

该文论述了我国北方粉蛉7种,其中卷粉蛉属Helicoconis及污褐卷粉蛉Helicoconis (Helicoconis)lutea为中国新记录,另包括粉蛉属Cxraiopteryx北方粉蛉Coniopteryx(Coniopteryx)arctica sp.nov,、周氏粉蛉Coniopteryx(Oniopteryx)choui,sp.nov.、宽带粉蛉Oniopteryx(Coniopteryx)vittiformis,sp nov.3新种及圣洁粉蛉Coniopteryx Coniopteryx)parthenia(Navas & Marcet,1910)、蒙干粉蛉Coniopteryx(Xeroconiopteryx)mongolica Melnander、爪干粉蛉Onioptery(Xeroconiopteryx)unguigonarcuata Aspock & Aspock 3中国新记录种。     

粉蛉记(一)曲粉蛉属Coniocompsa Enderlein 1905(脉翅目:粉蛉科)

曲粉蛉属(Coniocompsa)是脉翅目(Neuroptera)粉蛉科(Coniopterygidae)中的一个属,因下颚的外颚叶分三节,前翅中脉(M)干有两根脉鬃,后翅M有一半以上与第一肘脉(Cu_1)密接,以及腹部具成对的腹囊而属于囊粉蛉亚科(Aleuropteryginae);并由于径分脉(Rs)正常,前后翅M均单一等而独立为曲粉蛉族(Coniocompsini)。本族内目前只此一属。     

中国粉蛉属四种雌虫的分类学研究(脉翅目:粉蛉科)

对粉蛉科雌虫的分类研究方法进行了初步摸索,并对阿氏粉蛉Coniopteryx(Coniopteryx)aspoecki Kis,1967、圣洁粉蛉Coniopteryx(Coniopteryx)pygmaea Enderlein,1906、斜突粉蛉 Coniopteryx(Coniopteryx)plagiotropa Liu et Yang, 1997、周氏粉蛉Coniopteryx (Coniopteryx) choui Liu et Yang,1998的雌虫内生殖器结构特征进行了描述和绘图。     

草蛉科四新种(脉翅目)

本文所报道的是草蛉科(Chrysopidae)4新种,隶属于草蛉亚科 Chrysopinae 璃草蛉属 Glenochrysa、波草蛉属 Plesiochrysa、饰草蛉属 Semachrysa和替草蛉属 Tjederina。其中替草蛉属为我国首次记录。研究用标本分别为广州微生物所送鉴标本和北京农业大学馆藏标本。新种模式标本保存在北京农业大学昆虫标本室。本文量度单位均为mm。     

基于16S rRNA基因序列探讨中国粉蛉科的系统发育关系

本研究测定了粉蛉科Coniopterygidae9属15种昆虫16SrRNA基因部分序列,对序列的碱基组成、转换/颠换比率、遗传距离、变异位点等进行分析。基于16SrRNA基因序列数据,分别采用邻接法（NJ）、最大简约法（MP）和最大相似法（ML）建立粉蛉科分子系统发育关系。研究结果表明：粉蛉亚科的粉蛉属Coniopteryx与重粉蛉属Semilalis是姊妹群,（虫齿）粉蛉属Conwentzia较前二者原始;囊粉蛉亚科的卷粉蛉属Helicoconis和隐粉蛉属Cryptoscenea的亲缘关系较近。曲粉蛉属Coniocompsa和异粉蛉属Heteroconis聚类在一起,但自展值较低。瑕粉蛉属Spiloconis和囊粉蛉属Aleuropteryx的位置在囊粉蛉亚科中不够稳定。     

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.     

鸡传染性法氏囊病病毒研究进展

传染性法氏囊病(Infection bursal disease, IBD)是由鸡传染性法氏囊病毒(Infectious bursal disease virus, IBDV)引起的鸡和火鸡的一种高度接触性传染病,给世界各国的禽养殖业带来了巨大损失.自IBDV发现至今新的变异株不断出现,分子结构的改变导致病毒致病力的改变及宿主对疫苗应答的改变,使得传统的疫苗已不能控制其流行,因此各国学者对其基因组结构和功能进行了广泛深入的研究,并积极研制新型有效的疫苗以达到防治的目的.     

Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2

In conclusion, the novel visual RT-LAMP assay is a simple, rapid, and sensitive approach for detection of SARS-CoV-2, and it is ready for application in primary care and community hospitals or health care centers, and even patients' own houses in response to the current SARS-CoV-2 epidemic because the assay does not require sophisticated equipment and skilled personnel. Furthermore, it is also ready to be used in fields for screening samples from wild animals and environments to facilitate the identification of potential intermediate hosts that mediate the cross-species transmission of SARS-CoV-2 from bats to humans.     

Perinatal Vertical Transmission of Chikungunya Virus in Ruili,a Town on the Border between China and Myanmar

正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016).     

Enterovirus 71 3C proteolytically processes the histone H3 N-terminal tail during infection

Highlights
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions.