中国北方秽蝇属二新种(双翅目:蝇科)

整理近年来采自我国北部地区蝇科标本,发现秽蝇属(Coenosia Meigen,1826)二新种,分别记述如下。模式标本保存于沈阳师范学院生物系。 角斑秽蝇Coenosia angulipunctata新种(图1—4)     

中国秽蝇属一新种 (双翅目：蝇科)

 记述了采自我国四川省的蝇科秽蝇属一新种,冯氏秽蝇Coenosia fengi sp.nov.。新种 具有触角较短、雄蝇阳基后突较弱、肛尾叶和侧尾叶细长等特征,应隶属白角秽蝇种团(C oenosia albicornis\|group)。新种近似于分布在俄罗斯西伯利亚地区的Coenosia ora lis Schnalb,1915,但新种雄蝇侧颜较窄,仅为触角宽的2/5,中胫前背鬃1,后股后腹鬃 仅分布于基部2/3,后胫具2根长的前腹鬃,肛尾叶侧面观较宽等即可区别。模式标本保存于 沈阳师范学院生物系。     

四川西部秽蝇族四新种(双翅目:蝇科)

报道四川秽蝇亚科Coenosiinae秽蝇族Coenosiini新种：短指秽蝇,新种Coenosiabrachyodactylasp．nov．;虎爪溜芒蝇,新种Cariceaungulitiorissp．nov．;后侧叶溜芒蝇,新种Lariceapostifoliferasp.nov.;寒溜芒蝇,新种Cariceafrigidasp．nov。模式标本存沈阳师范学院昆虫研究所。     

中国秽蝇族二新种（双翅目：蝇科）

本文采自云南和广东的秽蝇族二新种,即亚缘秽蝇和褐翅长鬃秽蝇。     

四川西部秽蝇族四新种

本文报道四川秽蝇亚科Ｃｏｅｎｏｓｉｉｎａｅ秽蝇族 Ｃｏｅｎｏｓｉｉｎｉ４新种；短指秽蝇，新种Ｃｏｅｎｏｓｉａ ｂｒａｃｈｙｏｄａｃｔｙｌａ ｓｐ．ｎｏｖ．；虎爪溜芒蝇，新种Ｃａｒｉｃｅａ ｕｎｇｕｌｉｔｉｇｒｉｓ ｓｐ．ｎｏｖ．；后侧叶溜芒蝇，新种Ｃａｒｉｃｅａ ｐｏｓｔｉｆｏｌｉｆｅｒａ ｓｐ．ｎｏｖ；寒溜芒蝇，新种Ｃａｒｉｃｅａ ｆｒｉｇｉｄａ ｓｐ．ｎｏｖ。模式标本存沈阳师范学院昆虫研究所。     

中国秽蝇属虎秽蝇种团（双翅目：蝇科）分类研究

虎秽蝇种团隶属于双翅目蝇科的秽蝇属,全世界已记录有7种。通过对我国虎秽蝇种团进行整理,总结我国该种团共8种(亚种),编制了分种检索表,并对其中的l新种和2新亚种分别予以记述,即：(1)白瓣秽蝇,新种Coenosiaalbisquamasp．nov．,该新种近似c．breviaedeagusWu et Xue,1996,但间额黑色无粉被,侧颜宽约为触角第三节宽l／3(后为2／3),小盾片背面灰色,仅后端缘棕色,中股前腹鬃较短,近端后背鬃l,腹部侧斑近三角形等可相区别。(2)褐瘦弱秽绳,新亚种Coenosia attenuata brunneasubsp．nov．,本新亚种与其指名亚种瘦弱秽蝇C．attenuata Stein,1903,雄性尾器大体相同,但以下方面区别明显：额、颜、侧颜和颊的粉被为棕褐色(不为灰白色),额狭于头宽的l／3,额三角达额上方的l／3(不在下方l／3),触角和下颚须黑褐色(不为完全黄色);胸部粉被褐色(不为灰色),盾片具3黑条,分别在中鬃和背中鬃列上(指名亚种无),腋瓣淡棕色;各足的基节、转节、股节和胫节的基半部为黑褐色(不为黄色),后股具短小的前腹鬃列;腹部粉被均暗褐色(不为灰色)。(3)版纳秽蝇,新亚种Coenosia strtitpes bannaensis subsp．nov．,该新亚种与主要分布于古北区的指名亚种毛足秽蝇C．strigipes和Sten,1916区别在于：雄性和雌性的额三角前端达额中部,侧颜较狭;触角第三节完全黄色;各足股节较细,中、后股节腹面无细长毛,后足胫节较直,各足跗节约等于胫节长;第l 2合背板具1对侧斑,第一腹板裸等。模式标本保存在沈阳师范大学昆虫研究所。     

浙江省秽蝇属四新种：双翅目：蝇科

本文记述浙江省庆元地区百山祖山区产蝇科四新种,分别命名为葫尾秽蝇Ｃｏｅｎｏｓｉａ ｌａｇｅｎｉｃａｕｄａ ｓｐ．ｎｏｖ．,匙叶秽蝇Ｃｏｅｎｏｓｉａ ｓｐａｔｕｌｉｓｆｏｒｃｅｐｓ ｓｐ．ｎｏｖ．大秽蝇Ｃｏｅｎｏｓｉａ ｇｒａｎｄｉｓ ｓｐ．ｎｏｖ．和山栖秽蝇Ｃｏｅｎｏｓｉａｗ ｍｏｎｔｉｃｏｌａ ｓｐ．ｎｏｖ。等。     

中国秽蝇属一新种(双翅目：蝇科)

记述了采自我国四川省的蝇科秽蝇属一新种,冯氏秽蝇Coenosia fengi sp.nov.。新种具有触角较短、雄蝇阳基后突较弱、肛尾叶和侧尾叶细长等特征,应隶属白角秽蝇种团(Coenosia albicornis-group)。新种近似于分布在俄罗斯西伯利亚地区的Coenosia oralis Schnalb,1915,但新种雄蝇侧颜较窄,仅为触角宽的2/5,中胫前背鬃1,后股后腹鬃仅分布于基部2/3,后胫具2根长的前腹鬃,肛尾叶侧面观较宽等即可区别。模式标本保存于沈阳师范学院生物系。     

新疆秽蝇属五新种(双翅目:蝇科)(英文)

本文记述新疆产秽蝇属五新种 ,即亚黄鬃秽蝇Coenosiasubflavisetasp .nov.,模式产地 :新疆乌恰县拜古尔特 ;亚细秽蝇Coenosiasubgracilissp.nov.,模式产地 :新疆沙湾宁家河 ;金秽蝇Coenosiaaureasp.nov .,模式产地 :亲疆巴楚 ;点秽蝇Coenosiaparvasp .nov .,模式产地 :新疆东昆化阿其克湖岸 ;和赵氏秽蝇Coenosiazhaoisp .nov.,模式产地 :新疆天山温泉。点秽蝇的正模标本存于作者单位 ,其余模式标本存于中国科学院动物研究所。     

秽蝇属豹爪秽蝇新种团一新种（双翅目：蝇科）

记述秽蝇属一新种豹爪秽蝇Coenosia ungulipardus sp.nov.,该种应独立为豹爪秽蝇新种团C. ungulipardus-group,它同白角秽蝇种团C. albicornis-group相近似,但新种团特征是雄额三角伸延至额中部,无外顶鬃,触角不变短;下腋瓣短小,背中鬃1+3;足黑色,后胫前背鬃2;肛尾叶和侧尾叶均细长,阳基后突较明显等。模式标本存于沈阳师范学院昆虫研究所。     

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.