内特螨属在中国首次发现及二新种记述(蜱螨亚纲:尾足螨股)

报道内特螨属Ｎｅｎｔｅｒｉａ在中国首次发现,并记述２新种：中华内特螨Ｎ．ｓｉｎｉｃａ ｓｐ．ｎｏｖ．和吉林内特螨Ｎ．ｊｉｌｉｎｅｎｓｉｓ ｓｐ．ｎｏｖ．。     

湿螨属四新种记述及中华湿螨再记述：（蜱螨亚纲：湿螨科）

本文记述湿螨属水螨四种新种：郭氏湿螨Ｈｙｇｒｏｂａｔｅｓ ｇｏｕｓｉ ｓｐ．ｎｏｖ．,贵州湿螨Ｈ．ｇｕｉａｈｏｕｅｎｓｉｓ ｓｐ．ｎｏｖ．,墨缘湿螨Ｈ．ａｔｒｏｖｉｒｅｎｓ ｓｐ．ｎｏｖ．和兴义湿螨Ｈ．ｘｉｎｙｉｅｎｓｉｓ ｓｐ．ｎｏｖ．．文中扼述了它们与近似种的区别。另外。还对中华湿螨Ｈ．ｓｉｎｅｎｓｉｓ Ｕｃｈｉｄｅ Ｉｍａｍｕｒａ作了再描述。     

植绥螨科四新种记述（蜱螨亚纲：植绥螨科）

本文记述植绥螨科４新种：长囊钝绥螨Ａｍｂｌｙｓｅｉｕｓ ｌｏｎｇｉｓａｃｃａｔｕｓ ｓｐ．ｎｏｖ．,钩囊钝绥螨Ａ．ｓｔｒｏｂｏｃｏｒｙｃｕｓ ｓｐ．ｎｏｖ．,新裴济钝绥螨Ａ．ｎｅｎｆｉｊｉｅｎｓｉｓ ｓｐ．ｎｏｖ．及侧膜盲走螨Ｔｙｐｈｌｏｄｒｏｍｕｓ ｌａｔｅｒｉｓ ｓｐ．ｎｏｖ．。     

中国南方珠甲螨属种类纪要（蜱螨亚纲：甲螨亚目：珠甲螨科）

本文记述我国南方土壤甲螨珠甲螨属Ｄａｍａｅｕｓ Ｋｏｃｈ种类共９种,其中包括５新种：矩刺珠甲螨Ｄ．ｓｐｉｎｉｇｅｒ ｓｐ．ｎｏｖ．,短毛洙甲螨Ｄ．ｂｒｅｖｉｓｅｔｕｓ ｓｐ．ｎｏｖ．,姚氏珠甲螨Ｄ．ｙａｏｉ ｓｐ．ｎｏｖ．,巨突珠甲螨Ｄ．ｅｘｓｅｒｔｕｓ ｓｐ．ｎｏｖ．,鞭毛珠甲螨Ｄ．ｆｌａｇｅｌｌａｔｕｓ ｓｐ．ｎｏｖ．;１个中国新纪录盔珠甲螨Ｄ．ａｒｍａｔｕｓ（Ａｏｋｉ）;２项新组合：将ａｒｍ     

吉林省下盾螨属三新种（蜱螨亚纲：厉螨科）

吉林省已发现的下盾螨有溜下盾螨Ｈｙｐｏａｓｐｉｓ ｌｕｂｒｉｃａ Ｖｏｉｇｔｓ ｅｔ Ｏｕｄｅｍａｎｓ,力下盾螨Ｈｙｐｏａｓｐｉｓ ｈｒｄｙｉ Ｓａｍｓｉｎａｋ和尖狭下盾螨Ｈｙｐｏａｓｐｉｓ ａｃｕｌｅｉｆｅｒ（Ｃａｎｅｓｔｒｉｎｉ）。另外采到三新种,命名为松江下盾螨Ｈｙｐｏａｓｐｉｓ ｓｕｎｇａｒｉｓ ｓｐ．ｎｏｖ．,柔弱下盾螨Ｈｙｐｏａｓｐｉｓ ｄｅｂｉｌｉｓ ｓｐ．ｎｏｖ．和长毛下质螨Ｈｙｐ     

中国船甲螨属记述(蜱螨亚纲:甲螨亚目:卷边甲螨科)

本文记述中国船甲螨属Ｓｃａｐｈｅｒｅｍａｅｕｓ Ｂｅｒｌｅｓｅ种类共６种,其中包括５新种：网纹船甲螨Ｓ．ｒｅｔｅｓｔｒｉａｔｕｓ ｓｐ．ｎｏｖ．,钩船甲螨Ｓ．ｕｎｃｉｎａｔｕｓ ｓｐ．ｎｏｖ．,四网船甲螨Ｓ．ｑｕａｒｉｒｅｔｉｃｕｌａｔｕｓ ｓｐ．ｎｏｖ。,双突船甲螨．Ｓｂｉｔｕｂｅｒｃｕｌａｔｕｓ ｓｐ．ｎｏｖ．,指突船甲螨Ｓ．ｄｉｇｉｔａｔｕｓ ｓｐ．ｎｏｖ和１个中国新纪录种子代船甲螨Ｓ．ｎａ     

吉林省寄螨亚科三新种记述（蜱螨亚纲：寄螨科）

本文报道在吉林省前郭尔罗斯蒙古族自治县的小家鼠巢内采到的寄螨科３新种，即邓氏寄螨Ｐａｒａｓｉｔｕｓ ｔｅｎｇｋｕｏｆａｎｉ ｓｐ．ｎｏｖ．、王氏寄螨Ｐａｒａｓｉｔｕｓ ｗａｎｇｄｕｎｑｉｎｇｉ ｓｐ．ｎｏｖ．和孟氏寄螨Ｐａｒａｓｉｔｕｓ ｍｅｎｇｙａｎｇｃｈｕｎａｅ ｓｐ．ｎｏｖ．。     

寄螨属一新种三新纪录（蜱螨亚纲：寄螨科）

本文记述采自宁夏自治区的寄螨Ｐａｒａｓｉｔｕｓ Ｌａｔｒｅｉｌｌｅ共６种,其中奇盖寄螨Ｐ．ｍｉｒａｔｅｃｔｕｓ ｓｐ．ｎｏｖ．是未曾描述过的种类;甲虫寄螨Ｐ．ｃｏｌｅｏｐｔｒａｔｏｒｕｓ、甜菜寄螨Ｐ．ｂｅｔａ与透明寄螨Ｐ．ｈｙａｌｉｎｕｓ为国内首次纪录。前此,我国曾记录７种寄螨,至此已有１１种。     

手绥螨属3新种和洮安手绥螨补充描述（蜱螨亚纲：革螨股：裂胸螨科）

记述手绥螨属３新种：长岭手绥螨Ｃｈｅｉｒｏｓｅｉｕｓ ｃｈａｎｇｌｉｎｇｅｎｓｉｓ ｓｐ．ｎｏｖ．,宽沟手绥螨Ｃｈｅｉｒｏｓｅｉｕｓ ｃａｐａｃｏｐｅｒｉｔｒｅｍａｔｕｓ ｓｐ．ｎｏｖ．和狭沟手绥螨Ｃｈｅｉｒｏｓｅｉｕｓ ａｎｇｕｓｔｉｐｅｒｉｔｒｅｍａｔｕｓ ｓｐ．ｎｏｖ．,并补充洮手绥螨Ｃｈｅｉｒｏｓｅｉｕｓ ｔａｏａｎｅｎｓｉｓ Ｍａ．１９９６雌螨特征及描述后若螨。     

曲美绥螨雄螨和洮儿河美绥螨前若螨描述（蜱螨亚纲：革螨股：美绥螨科）

描述曲美绥螨Ａｍｅｒｏｓｅｉｕｓ ｃｕｒｖａｔｕｓ Ｇｕ．Ｗａｎｇ ｅｔ Ｂａｉ,１９８９雄螨和洮儿河美绥螨Ａｍｅｒｏｓｅｉｕｓ ｔａｏｅｒｈｅｎｓｉｓ,Ｍａ,１９９５前若螨。     

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