甘肃省痂蝗属一新种（蝗总科：斑翅蝗科）

本文记述采自甘肃省肃北县鱼儿红牧场的斑翅蝗科痂蝗属Ｂｒｙｏｄｅｍａ一新种,野马山痂蝗Ｂ．ｙｅｍａｓｈａｎａ ｓｐ．ｎｏｖ．,新种与透翅痂蝗Ｂ．ｈｙａｌｉｎａｌａ Ｚｈｅｎｇ ｅｔ Ｚｈａｎｇ近似。     

甘肃省雏蝗属一新种记述（蝗总科：网翅蝗科）

本文记述了雏蝗属一新种：短角雏蝗（Ｃｈｏｒｔｈｉｐｐｕｓｂｒｅｖｉｃｏｒｎｉｓｓｐ．ｎｏｖ．,采自甘肃省肃南县宝瓶河牧场。模式标本存于陕西师范大学动物研究所。     

南疆束颈蝗属二新种：蝗总科：斑翅蝗科

本文记述采自新疆南部地区束颈蝗属二新种,叶城束颈蝗Ｓｐｈｉｎｇｏｎｏｔｕｓｙｅｃｈｅｎｇｅｎｓｉｓ ｓｐ．ｎｏｖ．及塔克拉玛束颈蝗Ｓｐｈｉｎｇｏｎｏｔｕｓ ｔａｋｒａｍａｅｎｓｉｓ ｓｐ．ｎｏｖ．模式标本保存于陕西范大学动物研究所标本室。     

甘肃省凹背蝗属一新种（蝗总科：网翅蝗科）

本文记述采自甘肃省兴隆山地区凹背蝗属一新种,兴隆山凹背蝗Ｐｔｙｇｏｎｏｔｕｓｘｉｎｇｌｏｎｇ－ｓｈａｎｅｎｓｉｓｓｐ．ｎｏｖ．     

日本稻蝗、中华稻蝗和赤胫伪稻蝗地理种群的RAPD遗传分化研究

运用10个RAPD引物对日本稻蝗(Oxya japonica)、中华稻蝗(Oxya chinensis)和赤胫伪稻蝗(Pseudoxya diminuta)的种群遗传分化进行分析。10个随机引物共产生135条带,扩增谱带具有明显的属、种间多态性。Shannon信息指数表明中华稻蝗遗传多样性水平较高(2．693),日本稻蝗次之(2.319),赤胫伪稻蝗最低(1．042)。中华稻蝗和日本稻蝗的不同地理居群出现遗传分化,由Shannon信息指数估算的种群间遗传分化系数分别为20．7％,42．4％。用UPGMA和NJ法对Nei’s遗传距离作聚类分析,构建分子系统树。系统树显示：同一种群的不同个体优先相聚,而后,同一种的不同种群依次相聚;日本稻蝗广西南宁种群和广东广州种群首先聚为一支,陕西西安种群和浙江杭州种群聚为另一支,两支相聚后与中华稻蝗聚在一起,最后与赤胫伪稻蝗相聚。聚类结果表明：不同地域日本稻蝗亲缘关系的远近与地理距离呈现一定的相关趋势,日本稻蝗与中华稻蝗亲缘关系较近,Nei’S遗传距离平均为0．142,而赤胫伪稻蝗与它们关系较远,Nei’s遗传距离平均为0．451。聚类图所显示的物种间亲缘关系的远近程度与形态分类学和细胞分类学结果相一致。     

青海省雏蝗属三新种（直翅目：网翅蝗科）

记述采自青海少网翅蝗科雏蝗属３新种,即祁连山雏蝗Ｃｈｏｒｔｈｉｐｐｕｓ ｑｉｌｉａｎｓｈａｎｅｎｓｉｓ,ｓｐ．ｎ．、积石山雏蝗Ｃｈｏｕｔｈｉｐｐｕｓ ｕｉｓｈｉｓｈａｎｅｎｓｉｓ,ｓｐ．ｎ．及循化雏蝗Ｃｈｏｒｔｈｉｐｐｕｓ ｘｕｎｈｕａｅｎｓｉｓ,ｓｐ．ｎ．。模式标本保存于陕西师范大学动物研究所。     

贺兰山地区雏蝗属二新种记述(直翅目:网翅蝗科)

记述在贺兰山西侧阿拉善左旗采到的网支蝗科雏蝗二新种，即阿拉善雏蝗Ｃｈｏｒｔｈｉｐｐｕｓ ａｌｘａｅｎｓｉｓ Ｚｈｅｎｇ，ｓｐ．ｎｏｖ，及哈拉乌雏蝗Ｃｈｏｒｔｈｉｐｐｕｓ ｈａｌａｗｕｅｎｓｉｓ Ｚｈｅｎｇ，ｓｐ，ｎｏｖ．。     

云南蝗属一新种及中甸拟澜沧蝗雌性记述(直翅目,瘤锥蝗科)

记述采自滇西北横断山地区云南蝗属1新种,即郑氏云南蝗Yuannanites zhengi sp．nov．,模式标本保存于云南大理学院生命科学与化学系;编写了该属的分种检索表。另记述中甸拟澜沧蝗的雌性。     

中国鸣蝗属一新种(直翅目:蝗总科)

报道采自重庆市万盛地区鸣蝗属一新种。重庆鸣蝗Ｍｏｎｇｏｌｏｔｅｔｔｉｘ ｃｈｏｎｇｑｉｎｇｅｎｓｉｓ ｓｐ．ｎｏｖ．,新种近似于异翅鸣蝗Ｍｏｎｇｏｌｏｔｅｔｔｉｘ ａｎｏｍｏｐｔｅｒｕｓ（Ｃａｕｄ．）。主要区别为雌性前翅顶端具凹口;雄性前翅达后足股节膝部;雄性得部末节北板具圆形尾片。     

中国窝蝗属一新种：直翅目：蝗总科：剑角蝗科

本文了剑角蝗科窝蝗属１新种：郑氏窝蝗Ｆｏｖｅｏｌａｔａｃｒｉｓ ｚｈｅｎｇｉ,ｓｐ．ｎｏｖ。,采自甘肃省南县宝瓶河牧场;并据此对属征作了必要的修订,给出了分种检索表。模式标本保存于陕西师范大学动物研究所。     

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.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.