中国绿芫菁属一新种（鞘翅目：芫菁科）

记述采自中国河北的绿芫菁属Lytta Fabricius 1 新种:周氏绿芫菁Lytta choui sp. nov.。新种外形与绿边绿芫菁L. suturella (Motschulsky, 1860)十分相似,但新种:1)头部黄色额斑菱形;2)前足胫节末端 2 距,外距细小,内距大而弯;3)第8节背板锐角凹陷;4)前胸前缘凹陷较浅;5)中茎腹钩发达,阳茎细长等特征可与后者区别。文中还给出了新种的成虫和形态特征图。模式标本保存于河北大学博物馆。     

中国豆芫菁属一新种及二雌性补充描述(鞘翅目,芫菁科)

记述云南豆芫菁属1新种,即缘毛豆芫菁,新种Epicauta seriata sp.nov.;编制了凹跗豆芫菁组Epicauta interrupta group已知种检索表;并对钩刺豆芫菁E.curvispina Kaszab和墨江豆芫菁E.mojiangensis Tan雌性进行了补充描述.模式标本保存于河北大学博物馆.     

细纹豆芫菁和大斑芫菁的性行为

本文对细纹豆芫菁EpicautamannerheimiM kl和大斑芫菁MylabrisphalerataPallas的求偶和交配过程进行了描述。列举了芫菁亚科 5族 1 3属 3 4种芫菁的性行为 ,并讨论了雄成虫在形态构造上对求偶和交配行为的适应性行为。     

中国沟芫菁属分类研究及一新种记述(鞘翅目,芫菁科)

总结中国沟芫菁属Hycleus Latreille,1817并记述1新种:毛背沟芫菁Hycleus dorsetiferus sp.nov.及1新组合:多毛沟芫菁Hycleus hirtus(Tan,1992)comb.nov.。新种模式标本保存在河北大学博物馆。提供了中国已知种类的分种检索表。     

中国豆芫菁属一新种及二雌性补充描述（鞘翅目，芜菁科）

记述云南豆芫菁属1新种,即缘毛豆芫菁,新种Epicauta seriata sp.nov.;编制了凹跗豆芫菁组Epicauta interrupta group已知种检索表;并对钩刺豆芫菁E．curvispina Kaszab和墨江豆芫菁E．mojiangensis Tan雌性进行了补充描述。模式标本保存于河北大学博物馆。     

短翅豆芫菁生物学特性研究

短翅豆芫菁 Epiauta aptera Kaszab系芫菁科豆芫菁属昆虫 ,为民间常用中草药。具有破血逐瘀 ,消症散结 ,壮阳利尿 ,攻毒等功效。主治症瘕、恶疮、闭经、疥癣等。近年来国内外医药专家多用芫菁素和以芫菁素为原料合成的一系列药物治疗肝癌、肺癌、乳腺癌以及直肠癌等均取得了较好的疗效 ,总有效率在 45 %～ 65 %。由于芫菁资源日趋枯竭 ,用药量不断增大 ,市场供求矛盾突出 ,为了开发利用新的药源 ,1 987～1 997年作者先后对四川、云南、广西等地的芫菁资源做了实地考察 ,并对其中分布广、贮量大的种类的生物学做了较为详细的研究 ,现将有关…     

红头豆芫菁成虫芫菁素含量的研究

芫菁素在红头豆芫菁体内主要贮存在雄虫的生殖腺和卵内。与野生群体两性芫菁素的平均含量相比较,刚交配过的雄虫失去体内７０％的芫菁素,其雌配偶体内芫菁素含量相应升高４３％。红头豆芫菁可用作中药材。经１１０℃烘干后的雄虫,用酸水解后提取的芫菁素含量比直接提取的含量增高４倍。     

美国豆芫菁交配型的研究

在美国密苏里哥伦比亚州立石桥公园一枝黄花(Solidago sp.)植物样地内,采集研究美国豆芫菁(Epicauta pennsylvanica)并测量其三项计量指标.统计结果表明,无论交配与否,同性别个体的头宽,第一触角节宽部与自身的干体重呈正相关(p<0.05).配对的雌、雄之间在身体干重、头宽和第一触角节宽间均无明显的相关性(p>0.05).室内的交配时间与雌、雄干重无明显相关性(p>0.05).因此,虽可能存在雄虫的单向性选择性,美国豆芫菁应属于随机交配型.作者不同意D.K.Mclain认为美国豆芫菁为选型交配的观点,并从种的生物学特性方面提出依据.     

基于触角感器的部分芫菁属、种分类地位和关系分析(鞘翅目:芫菁科)

针对斑芫菁族分类系统中伪斑芫菁属Pseudabris分类关系的不确定,选择该族6个代表种,对其触角感器的形态特征、类型变化和分布位置做了记述、分析比较,提供了扫描电镜照片;基于14个触角特征的分析数据,构建了该族3个属和6个种可能的系统发育树。属间关系:沟芫菁属Hycleus+(伪斑芫菁Pseudabris+苹斑芫菁Mylabris);种间关系:(眼斑沟芫菁H.cichorii+大斑沟芫菁指名亚种H.phaleratus)+((长角伪斑芫菁P.hingstoni+长腹伪斑芫菁P.longiventris)+(苹斑芫菁M.calida+丽斑芫菁M.speciosa))。     

贵州5种药用豆芫菁形态比较研究

本文对贵州5种药用豆芫菁外部形态及其雌、雄外生殖器特征进行比较研究,旨在增补和完善该类昆虫的形态特征,为药用芫菁的分类及种类鉴定提供系统全面的参考资料。结果表明:所研究的5种药用豆芫菁的外部形态特征(体长、触角、头部、前胸背板、雄性前足胫节)及雌雄外生殖器构造(阳茎基、阳茎、产卵瓣)在种间既有共性,又存在明显差异,可作为该类药用昆虫物种准确鉴定的主要依据。此外,本文提供了这5种豆芫菁的整体照片、局部特征图及分种检索表。     

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.