中国瘿螨科三新种记述(蜱螨亚纲:瘿螨总科)

记述瘿螨科3新种：紫珠瘤瘿螨Aceria callicarpae,sp.nov.,寄主为大叶紫珠;甜茶叶刺瘿螨Phyllocoptes suavissimi,sp.nov.,寄主为甜茶;以及黄瑞木畸瘿螨Abacarus adinandrae sp.nov.,寄主为亮叶黄瑞木。     

中国顶冠瘿螨属二新种记述（蜱螨亚纲：瘿螨科）

记述顶冠瘿螨属Tegolophus Keifer1961,2新种,即：算盘子顶冠瘿螨Tegolo-phus glochidionis sp.nov.,分布于湖南株州市;马甲子顶冠瘿螨Tegolophus paliurus sp.nov.,分布于重庆市。     

中国瘿螨科三新种记述(蜱螨亚纲,瘿螨总科)

记述了合位瘿螨属Cosella 1新种:广花耳草合位瘿螨Cosella hedyotis sp.nov.,畸瘿螨属Abacarus2新种:心叶稷畸瘿螨Abacarus panici sp.nov.和芦竹畸瘿螨Abacarus arunis sp.nov..前者采自广西防城港市上思县十万大山国家森林公园,后两种采自广西武鸣县大明山.量度单位为μm.模式标本保存在广西大学农学院昆虫教研室.     

中国叶刺瘿螨亚科一新属三新种一新纪录种(蜱螨亚纲,瘿螨科)

描述叶刺瘿螨亚科Phyllocoptinae新属为：新上三脊瘿螨属Neocalepitrimerus gen.nov.,3新种是金樱新上三脊瘿螨Neocalepitrimerus rosa sp.nov.,寄主植物是金樱子Rosalaevigata（Michx）;山绿豆四瘿螨Tetra desmodium sp.nov.,寄主植物是异果山绿豆Desmodium heterocarpum（L.）;叶下珠顶冠瘿螨Tegolophus phyllathus sp.nov.,寄主植物是叶下珠Phyllathus sp.;1新纪录种是土密树四瘿螨Tetra bridelineDas＆Chakrabati。     

中国瘿螨亚科Eriophyinae二新种记述 （蜱螨亚纲：瘿螨科）

 描述了瘿螨亚科二新种：胡枝子瘤瘿螨Aceria lespedezae Kuang,sp.nov.,模式产地 辽宁鞍山市;竹斜瘿螨Acaralox bambusae Kuang,sp.nov.,模式产地湖南冷水江市。     

中国瘿螨科一新属二新种记述（蜱螨亚纲：瘿螨总科）

记述瘿螨科1新－长胫毛瘿螨属Longitibisetacus及2新种：竹长胫毛瘿螨Longitibisetaws bambusae,spl.nov。和榆顶冠瘿螨Tegolophus ulmi,sp.nov。模式标本保存在南京农业大学植物保护系。     

中国瘿螨亚科Eriophyinae二新种记述（蜱螨亚纲：瘿螨科）

描述了瘿螨亚科二新种：胡枝子瘤瘿螨Acerialespedezae Kuang,sp.nov.,模式产地辽宁鞍山市;竹斜瘿螨Acaralox bambusae Kuang,sp.nov.,模式产地湖南冷水江市。     

羽毛瘿螨科3新种记述（蜱螨亚纲：羽爪瘿螨科）

记述羽爪瘿螨科3个新种：扁担杆鼻植羽瘿植Rhinophytoptus grewiae sp.nov.,寄主为扁担杆;喜树蜡皮瘿螨Apodiptacus comptothecae sp.nov.,寄主为喜树：竹无毛双羽瘿螨Asetadiptacus indosasae sp.nov.,寄主为大节竹。     

中国叶刺瘿螨亚科四新种记述

记述叶刺瘿螨亚科4新种:野葛藤裂柄瘿螨 Dichopelmus puerariae,sp.nov.,猪肚勒上三脊瘿螨 Calepitrimerus jasmini,sp.nov.,环江顶冠瘿螨 Tegolophus huanjiangensis,sp.nov.,类芦新四瘿螨 Neotetra neyraudiae,sp.nov..模式标本保存在广西大学农学院.     

中国叶刺瘿螨亚科四新种记述(蜱螨亚纲：瘿螨科)

记述了叶刺瘿螨亚科(Phyllocoptinae)四新种：茅莓上三脊瘿螨Calepitrimerus rubi sp.nov.,槐顶冠瘿螨Tegolophus sophorae sp.nov.,丁香四刺瘿螨Tetraspinus syringae sp.nov.和柳副四瘿螨Paratetra sallicis sp.nov.。     

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.     

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.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细