广东省叶围烟煤菌研究

本文简要介绍了叶围烟煤菌的研究概况,报道了采自广东省境内的叶围烟煤菌5科11属29种,其中23种为我国新记录种．所有标本保存于广东省微生物研究所。     

片头叶蝉属三新种：（同翅目：叶蝉总科：耳叶蝉科）

本文记述耳叶蝉科片头叶蝉属三新种:圆冠片头叶蝉Petalocephala crcuata Cai et Kuoh,褐缘片头叶蝉Petalocephala fuscomarginata Cai et Kuoh,赭片头叶蝉Petalocephala ochracea Cai etKuoh。标本采自我国云南及四川省。文中描述了新种的外部形态及雄性外生殖器构造特征,并与近似种进行了比较。模式标本保存于安徽农学院。     

云南省目一新属新种(目:异科)

本文记述了异科一新属,即滇属 Ｄｉａｎｐｈａｓｍａ ｇｅｎ．ｎｏｖ,一新种即微翅滇Ｄｉａｎｐｈａｓｍａ　ｍｉｃｒｏｐｔｅｒａ ｓｎ．ｎｏｖ．。标本采自云南省小中甸,保存在中国科学院动物研究所。     

叶胶耳属一新种

本文报道了叶胶耳属Phyllogloea的一个新种,命名为刘氏叶胶耳Phyllogloea liui Liu et Cao。新种模式标本为贵州省安顺地区卫生防疫站刘美华先生采自安顺市甘堡林场海拔1290m处山林内的朽枝上。新种种名即为纪念刘先生而取的。     

吴氏角叶蚤幼虫形态记述及其与同属另外三种的比较（蚤目：角叶蚤科）

描述了吴氏角叶蚤Ceratophyllus wui Wang et Liu 的幼虫形态,并与同属三种蚤幼虫作比较,标本采自湖北省西北部神农架海拔2 300 m 短嘴金丝燕四川亚种 Collocalia brevirostris innominata巢窝内。     

贵州横脊叶蝉属一新种：同翅目：横脊叶蝉科

本文记述横脊叶蝉科Evacanthidae,横脊叶蝉属 Evacanthus一新种,模式标本采自梵净山金顶脚下,海拔2100 m。文中详细描述该种的外部形态和雄性外生殖器构造特征,并与淡脉横脊叶蝉Evacanthus danmainus Kuoh进行区別比较,附有主要特征图。     

叶胶耳属一新种(英文)

本文报道了叶胶耳属Phyllogloea的一个新种,命名为刘氏叶胶耳Phyllogloea liui Liu et Cao。新种模式标本为贵州省安顺地区卫生防疫站刘美华先生采自安顺市甘堡林场海拔1290m处山林内的朽枝上。新种种名即为纪念刘先生而取的。     

华东叶螨新种及新记录(蜱螨亚纲：叶螨总科，细须螨科)

作者在研究园林叶螨时,发现叶螨一新种及三个中国新记录,兹记述如下。 朴始叶螨 Eotetranychus celtis Ehara,中国新记录Eotetranychus celtis Ehara,1965:620 标本记录:16 59若螨,1987.Ⅵ.6,安徽省黄山,王冬生采自构树     

横脊叶蝉亚科四新种：同翅目：叶蝉科

本文记述采自河南省伏牛铁横脊叶蝉４新种;双突横脊叶蝉Ｅｖａｃａｎｔｈｕｓ ｐｒｏｃｅｒｕｓ Ｃａｉ ｅｔ Ｓｈｅｎ．长突横脊叶蝉Ｅ．ｌｏｎｇｕｓ Ｃａｉ ｅｔ Ｓｈｅｎ,白斑横脊叶蝉Ｅ．ａｌｂｏｍａｃｕｌａｔｕｓ Ｃａｉ ｅｔ Ｓｈｅｎ和双斑角突叶蝉Ｔａｐｅｒｕｓ ｂｉｍａｃｕｌａｔｕｓ Ｃａｉ ｅｔ Ｓｈｅｎ,模式标本保存在安徽农业大学。     

突大叶蝉属三新种：（同翅目：叶蝉总科）

本文记述同翅目Ｈｏｍｏｐｔｅｒａ叶蝉总科Ｃｉｃａｄｅｌｌｏｉｄｅａ大叶蝉科Ｃｉｃａｄｅｌｌｉｄａｅ突大叶蝉属Ｇｕｎｕｎｇｉｄｉａ三新种。红颜突大叶蝉Ｇｕｎｕｎｇｉｄｉａ ｒｕｎｕｎｇｉｄｉａ ｒｕｂｅｓｃｅｎｓ ｓｐ．ｎｏｖ．,锈面突大叶蝉Ｇ．ｒｕｂｉｇｉｎｏｓｅ ｓｐ．ｎｏｖ．与白翅突大叶蝉Ｇ．ａｌｂａｔａ ｓｐ．ｎｏｖ．。采自中国南方。     

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.