两种入侵广州的丽蝇——宽额丽蝇与红头丽蝇

采自广州的两种丽蝇--宽额丽蝇Calliphora latifron_xs Hough,1899、红头丽蝇Clliphora uicina Robineau-Des-voidy,1830,宽额丽蝇为我国新记录种,分析认为这两种丽蝇为入侵种.     

机敏异漏斗蛛的捕食行为及其控虫效能评估

为掌握园林常见蜘蛛对害虫的控制能力,在实验室条件下研究了不同发育期机敏异漏斗蛛Allagelena difficilis(Fox)对黑腹果蝇Drosophila melanogaster的捕食行为及其功能反应,并对雌、雄蛛捕食能力进行了比较。结果表明,机敏异漏斗蛛幼蛛和成蛛的捕食行为谱相似,均可分为靠近、奔向和试探、捕获、吸食、残体处理、清理附肢和休整,但具体行为稍有差异;对机敏异漏斗蛛雌性成蛛捕食黑腹果蝇的功能反应拟合,其结果符合HollingⅡ型方程:Na=1.003N/(1+0.002N),r2=0.98,其瞬间攻击率为0.95。雌蛛在未孕卵时其捕食量与雄性成蛛相近,但孕卵雌成蛛捕食量明显高于雄蛛。此结果可以为机敏异漏斗蛛的研究和利用提供依据。     

广州南沙港蝇类(双翅目:有瓣蝇类)调查

2007年7月至2009年6月自南沙港诱捕到有瓣蝇类46750头,包括蝇科、麻蝇科、丽蝇科、花蝇科25属45种,其中宽额丽蝇Calliphora latifrons Hough为我国新记录,红头丽蝇Calliphora vicina Robineau-Desvoidy和古铜黑蝇Ophyra aenescens Wiedemann为广东省新记录种.上述3种是近年来国外输入的蝇类.大头金蝇Chrysomya megacephala Fabricius为南沙港区优势种,发生高峰出现在9～10月,4～5月出现次高峰.     

白额巨蟹蛛对蟑螂捕食作用的研究

在一次课外活动中,我们观察到了1种蜘蛛捕食蟑螂的情景。经湖南师大颜亨梅教授鉴定,此蜘蛛为白额巨蟹蛛(Heteropoda venatoria);但在因特网上寻查不到有关详细资料。它的食量有多大?它有捕食嗜好吗?……我们带着这一系列问题进入研究阶段。经过1年多的试验和观察、整理试验数据,我们撰写出了这篇论文．并参加了湖南省第24届青少年创新发明大赛,荣获1等奖;2003年8月,被选送参加在甘肃兰州举行的全国第18届青少年创新发明大赛,荣获2等奖。     

三突花蛛对小菜蛾幼虫的捕食效应

本文研究三突花蛛对小菜蛾幼虫的捕食功能反应及干扰因素对捕食作用的影响。结果表明,三突花蛛对小菜蛾幼虫的捕食效应属HollingⅡ型反应,捕食作用率随捕食者-猎物比率上升而下降,雌蛛的捕食效应强于雄蛛。     

三突花蛛对小菜蛾幼虫的捕食效应

本文研究三突花蛛对小菜蛾幼虫的捕食功能反应及干扰因素对捕食作用的影响。结果表明,三突花蛛对小菜蛾幼诉捕食效应属ＨｏｌｌｉｎｇⅡ型反应,捕食作用率随捕食者－猪物比率上升而下降,雌蛛的捕食效应强于雄蛛。     

白额巨蟹蛛（Heteropoda venatoria）染色体的初步观察

对白额巨蟹蛛的血细胞染色体进行初步研究,发现其雌蛛的体细胞染色体２ｎ＝４４,其中含有中部着丝粒染色体,亚中部着丝粒染色体和近端着丝粒染色体。     

转Bt棉花对蜘蛛生长发育及捕食行为的影响

室内评价了取食转Bt棉叶的棉铃虫幼虫对草间钻头蛛和八斑鞘腹蛛生长发育的影响.并通过捕食功能反应评价了取食了Bt棉叶的棉铃虫幼虫对成熟草间钻头蛛捕食行为的影响.室内饲养实验结果表明草间钻头蛛、八斑鞘腹蛛取食用转Bt棉叶处理的棉铃虫幼虫与取食普通棉叶处理的棉铃虫幼虫的发育历期、成蛛体重都没有显著差异.捕食功能反应实验结果表明草间钻头蛛对棉铃虫幼虫的捕食功能反应符合HollingⅡ型圆盘方程,两组不同猎物饲养成熟的草间钻头蛛对同种处理的棉铃虫幼虫的捕食行为没有显著差异.综合考虑：转Bt棉对蜘蛛生长发育、捕食能力没有显著的负作用.     

我国南方巨蟹蛛属六新种（蜘蛛目：巨蟹蛛科）

本文记述了湖南省、广西壮族自治区、云南省和江西省产的巨蟹蛛属蜘蛛六新种,并绘制有外雌器和触肢器结构图。模式标本保存在湖南省生物研究所。种名:铃形巨蟹蛛新种Hete-ropoda campanacea sp.nov.;鳞片巨蟹蛛,新种Heteropoda squamaceasp.nov.;庐山巨蟹蛛,新种Heteropoda lushanensissp.nov.;细刺巨蟹蛛,新种Heteropoda spiculatasp.nov.;城步巨蟹蛛,新种Heteropoda chengbuensis sp.nov.;锯齿巨蟹蛛,新种Heteropoda serratasp.nov.     

三种蜘蛛丝蛋白组成分析

本文应用高压液相色谱（ＨＰＬＣ）法分析了岳麓山的大腹园蛛Ａｒａｎｅｕｓ ｖｅｎｔｒｉｃｏｓｕｓ（Ｃ．Ｋｏｃｈ,１８７８）,机敏漏头蛛Ａｇｅｌｅｎａ ｄｉｆｆｉｃｌｉｓ （Ｆｏｘ,１９３７）,白额巨蟹蛛Ｈｅｔｅｒｏｐｏｄａ ｖｅｎａｔｏｒｉａ （Ｌｉｎｎａｅｕｓ,１７５７）的丝蛋白的氨基酸组成,以ＳＤＳ－ＰＡＧＥ法测定了大腹园蛛不同丝腺体的未成丝的可溶性丝蛋白的分子量。实验结果表明蛛丝蛋白中占优势的     

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.     

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     

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.     

鸡传染性法氏囊病病毒研究进展

传染性法氏囊病(Infection bursal disease, IBD)是由鸡传染性法氏囊病毒(Infectious bursal disease virus, IBDV)引起的鸡和火鸡的一种高度接触性传染病,给世界各国的禽养殖业带来了巨大损失.自IBDV发现至今新的变异株不断出现,分子结构的改变导致病毒致病力的改变及宿主对疫苗应答的改变,使得传统的疫苗已不能控制其流行,因此各国学者对其基因组结构和功能进行了广泛深入的研究,并积极研制新型有效的疫苗以达到防治的目的.     

Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2

In conclusion, the novel visual RT-LAMP assay is a simple, rapid, and sensitive approach for detection of SARS-CoV-2, and it is ready for application in primary care and community hospitals or health care centers, and even patients' own houses in response to the current SARS-CoV-2 epidemic because the assay does not require sophisticated equipment and skilled personnel. Furthermore, it is also ready to be used in fields for screening samples from wild animals and environments to facilitate the identification of potential intermediate hosts that mediate the cross-species transmission of SARS-CoV-2 from bats to humans.     

Perinatal Vertical Transmission of Chikungunya Virus in Ruili,a Town on the Border between China and Myanmar

正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016).