滇北斑虻属一新种记述（双翅目：虻科）

滇北斑虻属一新种记述（双翅目：虻科）杨建设（云南省昭通地区卫生防疫站６５７０００）许荣满（军事医学科学院微生物流行病研究所北京１０００７１）１９９１年６一８月,第一作者在丽江州和迪庆州作虹类调查采集,于迪庆州中甸县纳阳梅山发现斑蛇属一新种。模式标本除...     

中国虻属种类检索表（双翅目：虻科）

虻科昆虫是重要吸血害虫,全世界约4230种,我国已知虻类达400多种。我国虻科共记载10个属,其中虻属Tabanus、斑虻属Chrysops、麻虻属Haematopota和瘤虻属Hybomitra的种类最多,占我国己知种的百分之九十以上。在以上4个属中,尤以虻属的种类最多,近200种。虻属的种类体态特征变异最大,在分类鉴定上有很大的困难。国外有的专家如Olsufjev、Ta-     

中国麻虻属新种和新记录种（双翅目：虻科）

本文记述采自云南省的虻科一新种亚沥青麻虻Hoematopta subpicea和一新记录种特拉斯里麻虻Haematopota tenasserimi。新种亚沥青麻虻一对翅的r_4附脉处均具小翅室,并成严格对称,该特征在虻科分类中首次发现,为探讨双翅目昆虫翅脉的演化及其翅室的形成提供了一个重要线索。模式标本保存于中国科学院上海昆虫研究所。     

中国麻翅虻属记述

一、序言 虻类为危害家畜的一种吸血昆虫,不但因其吸血而使家畜骚扰不安,并且是许多重要传染病的媒介。全世界已知虻类在3000种以上,麻翅虻属巳知约200多种。 我国最早记载的麻翅虻为1911年Ricardo氏记载的 Chrysozona sinensis Ric.及Chrysozona lata Ric.两种。其后经Szilady、Kr(?)ber、Shiraki、Takagi、Ouchi、     

云南省合室舞虻亚科的11新种（双翅目：舞虻科）

本文记述了云南省双翅目舞虻科合室舞虻亚科(Tachydrominac)的11个新种,分别隶属于平须舞虻属(Platypalpus)和隐肩舞虻属(Drapetis)。     

贵州虻属五新种（双翅目：虻科）

本文记述采自贵州的虻属五新种:似类柯虻Tabanus cordigeroides sp.nov.、贵州虻T.guizhouensis sp.nov.、似杭州虻T.hongchowoides sp,nov.、伪青腹虻T.Pseudoliuiuentris sp.nov.和亚岷山虻T.subminshanensis sp. nov.,并分别进行了分类讨论。     

西北虻科初记

虻类为畜牧业重要害虫之一。以前我国对虻类的研究不多,西北虽为我国主要牧区之一,但对西北虻类所知更少。除Krober氏(1934)对甘肃及内蒙西部的额济纳旗、戛兴诺尔及新疆乌鲁木齐等地报告有12种外,其他如青海、新疆等地的种类,皆全无所知。作者最近根据中国科学院昆虫研究所1955年在新疆由马世骏先生及夏凯龄、陈永林二同志所采集的虻类,及1956年在青海由马世骏先生领导下的一个采集队所采到的虻类,再加上1954—1956年西北畜牧兽医学院所收集的虻类标本为基础,并参考前人的著作,共     

长江流域虻科区系

我国长江流域一带地区,包括浙江、江苏、江西、安徽、湖南、湖北、四川等省在我国虻科区系分布上是极有意义的地区。在这一带地区已知虻类近30种,其中许多都是我国中部所特有的种类,它们构成一个特殊的区系。并且这些种类大多是极常见、经常为害家畜的重要吸血昆虫。由于我国虻类区系资料的缺乏和它们在医学昆虫上的重要性,所以把长江流域虻类区系作一专文讨论是很有必要的。 所有的标本很多是我所标本室多年来所收藏,以及作者近几年来在江苏、浙江一带进行采集调查所获的材料,共记录28种,其中有3个是新种。所有模式标本都保存于本所     

广西虻属二新种记述(双翅目:虻科)

1982年5—6月,作者在广西南部凭祥、龙州一带进行了虻类的采集调查,其中于(山弄)岗自然保护区发现虻属二新种。该保护区地处石灰岩地带,故这二新种分别订名为垩石虻和灰岩虻。模式标本除灰岩虻1只副模保存在广西寄生虫病防治研究所外,均保存在军事医学科学院。     

被子植物的起源-以喜花虻类化石为据

喜花昆虫在被子植物的起源和早期演化上起着决定性的作用。虻类化石中的许多类群都有访花习性,它们为研究被子植物的起源提供了独特材料。虽然最老的被子植物化石还没有发现,但是喜花虻类的爆发式出现,表示了被子植物出现的时间和地点。本文主要以欧亚大陆东部,特别是中国辽西的侏罗杨虻类化石为材料,在功能形态分析和与现代类群作对比的基础上,证证实了虻类是显花植物最原始的传粉类群之一。中国东北、哈萨克斯坦和西伯利来晚     

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     

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.     

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.     

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.     

Detection of EBV and HHV6 in the Brain Tissue of Patients with Rasmussen’s Encephalitis

Rasmussen’s encephalitis (RE) is a rare pediatric neurological disorder, and the exact etiology is not clear. Viral infection may be involved in the pathogenesis of RE, but conflicting results have reported. In this study, we evaluated the expression of both Epstein-Barr virus (EBV) and human herpes virus (HHV) 6 antigens in brain sections from 30 patients with RE and 16 control individuals by immunohistochemistry. In the RE group, EBV and HHV6 antigens were detected in 56.7% (17/30) and 50% (15/30) of individuals, respectively. In contrast, no detectable EBV and HHV6 antigen expression was found in brain tissues of the control group. The co-expression of EBV and HHV6 was detected in 20.0% (6/30) of individuals. In particular, a 4-year-old boy had a typical clinical course, including a medical history of viral encephalitis, intractable epilepsy, and hemispheric atrophy. The co-expression of EBV and HHV6 was detected in neurons and astrocytes in the brain tissue, accompanied by a high frequency of CD8⁺ T cells. Our results suggest that EBV and HHV6 infection and the activation of CD8⁺ T cells are involved in the pathogenesis of RE.     

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).     

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.