跳蝽──善跳的半翅目昆虫

跳蝽科Saldidae隶属于半翅目Heteroptera细蝽型（Leptopodomorpha）,目前已知共有26属277种,估计该科在全世界可有300多种。作者曾报道过中国的跳蝽2亚科9属34种（1987）[1,2],现已增至2亚科11属41种。跳蝽为世界性分布,大部分种类分布于全北界。目前已较系统地进行过区系调查的包括欧洲、独联体、中国、北美和中美。南美、非洲、南亚、西亚及大洋洲等地区的跳蝽种类只见零星的报道。跳蝽个体小,一般体长3～8mm,黑色或黑褐色,翅上具浅色斑纹,两个复眼大而突出。不同的属一般外貌上差异不大,因此在分类鉴定上有一定的困难。翅多…     

蹲跳、反向跳和下落跳的膝关节屈伸肌群肌电信号分析

目的：通过观察肌电图（EMG）的变化,了解运动员与普通中学生在纵跳过程中,膝关节屈伸肌群工作特点,为运动员科学选材提供依据。方法：30名男女青少年运动员和30名男女普通中学生进行各种形式纵跳（蹲跳、反向跳、下落跳）,测试膝关节屈伸肌群的EMG变化情况。结果：主动肌（股外肌）EMG的变化存在性别差异,随着下肢工作强度的增加,男运动员积分肌电图（iEMG)和平均功率频率（Fmean)均没有显著变化,女运动员iEMG增加,Fmean没有显著变化,对抗肌（股二头肌）,随着下肢工作强度的增加。青少年运动员EMG活动变化较小,而普通中学生的EMG活动明显增加。结论：在增加工作负荷的过程中,男运动员膝关节伸肌群以提高效率为主,女运动员以提高肌肉的募集数量为主;运动员的对抗肌协调水平高于普通中学生。     

中国花角跳小蜂属两新种 (膜翊目：跳小蜂科)

The present paper deals with 2 new species of the genus BlastoshrixMayr collected from Liaoning and Yunnan Provinces China. A key to the 7 speciesdistributed in China is given. The type specimens are preserved in the Department of Plant Protection, Henan Agricultural University.     

寄生柑桔矢尖蚧的跳小蜂一新种：膜翅目：跳小蜂科

本文记述盾蚧跳小蜂ＣｏｃｃｉｄｅｎｃｙｒｔｕｓＡｓｈｍｅａｄ１新种,即长尾 盾蚧跳小蜂     

中国湖北赵氏合跳蛛记述(蜘蛛目,跳蛛科)

记述了产于我国湖北的跳蛛l新种：赵氏合跳蛛Synagelides zhaoi sp.nov。新种的主要特征及其与近似种的区别在文中都有详细的论述,量度单位为mm。     

中国跳小蜂二新纪录属及三新种(膜翅目,跳小蜂科)

报道采自福建福州、吉林长春的3种跳小蜂,即桔小食甲跳小蜂Cerchysiella citricola Xu,sp.nov.,寄主为日本方头甲Cybocephalis nipponicus Endr.-Younga,初级寄主为柑橘类;扁角尼克跳小蜂Neocladella platicornis Xu,sp.nov.寄主不明和短翅思奇跳小蜂,其触角扁平膨大;短翅思奇跳小蜂Schilleriella brevipterus Xu,sp.nov.寄主为粉蚧,其前翅退化缩短.对新种进行了详细描述.本文也是尼克跳小蜂属Neocladella Girault和思奇跳小蜂属Schilleriella Ghesquiere在我国分布的首次记录.标本保存在浙江大学农业与生物技术学院应用昆虫研究所.     

寡索跳小蜂属一新种记述(膜翅目,跳小蜂科)

记述了寡索跳小蜂属Arrhenophagus Aurivillius的1新种,即长距寡索跳小蜂Arrhenophagus longicalcaratus sp.nov.。标本采自于云南省,从柑桔属植物上的盾蚧育得。     

软鳞跳小蜂属一新种记述（膜翅目：跳中蜂科）

本文记述中国软鳞跳小蜂属１新种：壶蚧软鳞跳小蜂Ｌａｋｓｈａｐｈａｇｕｓ ｃｅｒｏｃｏｃｃｉ Ｘｕ ｅｔ Ｈｅ，ｓｐ．ｎｏｖ．。模式标本保存在浙江农业大学生物防治研究室。     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

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.     

Synthesis and antimicrobial studies of hydrazone derivatives of 4-[3-(2,4-difluorophenyl)-4-formyl-1H-pyrazol-1-yl]benzoic acid and 4-[3-(3,4-difluorophenyl)-4-formyl-1H-pyrazol-1-yl]benzoic acid

Microbial resistance to antibiotics is an unresolved global concern, which needs urgent and coordinated action. One of the guidelines of the Centers for Disease Control and Preventions (CDC) to combat antibiotic resistance is the development of new antibiotics to treat drug-resistant bacteria. In our effort to find new antibiotics, we report the synthesis and antimicrobial studies of 30 new pyrazole derivatives. These novel molecules have been synthesized by using readily available starting materials and benign reaction conditions. Some of these molecules have shown activity with MIC values as low as 0.78?µg/mL against four bacterial strains; Staphylococcus aureus, methicillin-resistant S. aureus, Bacillus subtilis, and Acinetobacter baumannii. Furthermore, active molecules are non-toxic to mammalian cell line.