中国偏角飞虱属一新种：（同翅目：飞虱科）

本文记述采自陕西汉阴的偏角飞虱属Ｎｅｏｂｅｌｏｃｅｒａ１新种,即汉阴偏角飞虱Ｎｅｏｂｅｌｏｃｅｒａ ｈａｎｙｉｎｅｎｓｉｓ,ｓｐ．ｎｏｖ．。模式标本保存于西北农业大学昆虫博物馆。     

贵州害竹飞虱二新种记述(同翅目:飞虱科)

记述我国贵州省为害竹子的飞虱２新种,即基褐异脉飞虱Ｓｐｅｃｉｎｅｒｖｕｒｅｓ ｂａｓ９ｉｆｕｓｃａ Ｃｈｅｎ ｅｔ Ｌｉ,ｓｐ．ｎｏｖ和望谟竹飞虱Ｂａｍｂｕｓｉｐｔｈａｇａ ｗａｎｇｍｏｅｎｓｉｓ Ｃｈｅｎ ｅｔ Ｌｉ,ｓｐ．ｎｏｖ．。模式标本保存在贵州大学昆虫研究所。     

凹距族飞虱一新属一新种(同翅目:飞虱科)

本文记述飞虱科凹距族１新属,脊额飞虱属Ｃａｒｉｎｏｆｒｏｎｓ Ｃｈｅｎ ｅｔ Ｌｉ,ｇｅｎ．ｎｏｖ．,１新种,斑翅脊额飞虱Ｃ．ｍａｃｕｌａｔｉｐｅｎｎｉｓ Ｃｈｅｎ ｅｔ Ｌｉ,ｓｐ．ｎｏｖ．。模式标本保存于贵州大学昆虫研究所。     

中国短头飞虱属一新种记述(同翅目:飞虱科)

记述采自我国贵州省竹子上的短头飞虱属一新种,定名为齿突短头飞虱Ｅｐｅｕｒｙｓａ ｓｕｂｕｌａｔａ Ｃｈｅｎ ｅｔ Ｄｉｎｇ,ｓｐ．ｎｏｖ．,新种与台湾的Ｅ．ｍａｃｕｌａｔａ Ｙａｎｇ ｅｔ Ｙａｎｇ和Ｅ．ｓｉｎｏｂａｍｂｕｓａｅ Ｙａｎｇｅｔ Ｙａｎｇ近似,但可从以下综合特征来区别：１）前翅无翅斑;２）尾节腹中突尖齿状;３）阳茎基突结节为半圆形;以及阳基侧突的形状等。正模♂,贵州望谟,１９９７－     

灰飞虱类酵母型共生菌18S rDNA序列变异及系统发生

分离纯化了云南楚雄、宁夏银川、北京通县、上海七宝镇、四川西昌５个地区的灰飞虱体内类酵母型共生菌（Ｙｅａｓｔ－ｌｉｋｅ Ｓｙｍｂｉｏｎｔｓ,ＹＬＳ）,并对其１８ＳｒＤＡＮ的约６００ｂｐ的序列进行了测定。结合已有的序列,构建了不同宿主的ＹＬＳ的分子系统树。结果表明,灰飞虱的ＹＬＳ属于子囊菌亚门Ｐｙｒｅｎｏｍｙｃｅｔｅｓ纲,与此纲的Ｈ．ｃｈｒｙｓｏｓｐｅｒｍｕｓ亲缘关系最近。我国各地区及日本的灰飞虱体内     

中国飞虱科二属分类概要及三新种记述(半翅目,蜡蝉总科,飞虱科)

对分布于我国南方的飞虱科两个属:细突飞虱属Neoterthrona Yang et Yang及等胸飞虱属Paraconon Yang et Yang进行了分类概要,修订了2属的属征,并记述3个新种:直茎细突飞虱Neoterthrona recta sp.nov.,具瘤细突飞虱Neoterthrona tubercularis sp.nov.和中华等胸飞虱Paraconon sinensis sp.nov..文中分别给出了2属所有种的检索表.新种模式标本保存于西北农林科技大学昆虫博物馆.     

飞虱科中国一新记录属和新记录种

本文报道采自中国江苏地区的飞虱科Ｄｅｌｐｈａｃｉｄａｅ中国１新记录属和新记录种。标本保存在南京农业大学植物保护系。     

飞虱科一新属二新种

记述飞虱科一新属,即沟茎飞虱属Sulculus Ding et Chen, gen.nov.,二新种,即沟茎飞虱S. sulcatus Ding,sp.nov.和荔波沟茎飞虱S. liboensis Chen, sp. Nov.。模式标本分别保存于南京农业大学植物保护系和贵州大学昆虫研究所。     

中国西北地区飞虱科四新记录种

作者于1987和1988年对中国西北地区的飞虱种类进行了初步调查和采集,经整理鉴定,发现4种中国新记录种,均属于飞虱亚科(Delphacinae)、飞虱族(Delphacini),其中绿飞虱属Chloriona 2种,黎氏飞虱属Ribautodelphax和古北飞虱属Javesella各1种,而且黎氏飞虱属为我国首次记录。     

叉飞虱属(同翅目,飞虱科)分类研究

研究了叉飞虱属Garaga Anufriev的种类,共记述6个种,其中包括1新种G. trifurca Guo et Liang,sp.nov和中国大陆1新纪录种G.pallida Yang,补绘了已知种荻叉飞虱G.miscanthi Ding的特征图,并编制了叉飞虱属的分种检索表.     

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).