中国蝎目名录(蛛形纲:蝎目)

本文根据我国蝎目种类已有的记述,归纳列出5科9属19种和亚种的学名、引证及其地理分布,以供今后研究参考.     

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。     

云南华米虾属一新种(十足目:真虾次目:匙指虾科)

报道中国横断山区华山虾属一新种,即永胜华米虾Sinodina yongshengica sp.nov.,对其形态特征作了详细描述,并与近似种进行了比较。     

贵州省襀翅目昆虫之三(襀翅目:襀科、卷襀科)

贵州省的(衤责)翅昆虫种类丰富,作者(1990)在第一篇报道中除整理了贵州省此目已知纪录外,增加贵州2个新记录种和1个新种,第二篇(1991)又报道了贵州3个新记录种及1个新种,均刊载在《贵州科学》上。本文为贵州茂兰自然保护区的(衤责)翅目昆虫研究报告,增加了3个贵州省新记录种并描记2新种,模式标本保存在北京农业大学昆虫标本室。     

西藏、云南目昆虫二新种记述(目:科)

记述科 2新种——聂拉木短肛 Baculum nyalamense,sp. n.和版纳仿短肛 Paraclitumnus bannaensis,sp.n.。模式标本保存于中国科学院动物研究所。     

中国小鲵属一新种(两栖纲:有尾目:小鲵科)

对采自我国河南省商城的一种小鲵标本进行了研究,认为与我国产小鲵科巳知属、种及日本产小鲵属相近种均不相同,被确定为新种,即豫南小鲵Hynobius yunanicus sp.nov.。     

白鱼属鱼类的系统发育(鲤形目:鲤科)

白鱼属(Anabarilius Cockerell)是我国特有的鲤科鱼类,主要分布于云南东部、中部和四川南部。分布范围不大,但种的分化强烈。 Regan(1904,1908, 1918)最先报道四种白鱼,但均置于Barilius属。尔后,Cockerell(1923)以Barilius andersoni Regan为模式种建立白鱼属;Nichols(1927)、张孝威(1944)、易伯鲁、吴清江(1964)、刘振华、何纪昌(1983)先后记述了部分种和亚种。陈银瑞、褚新洛(1980)在系统整理的基础上,澄清了白鱼属属级分类上的混乱,记述了三新种和一新亚种。何纪昌、王重光(1984)用数值分类法探讨了白鱼属的分类,报道了二新种和一新亚种。至此,白鱼属共包括15个种和亚种。     

我国食肉目动物

食肉目是经济价值较大,分布十分广泛的动物类群。全世界现存8科89属240种,我国有7科30属56种。我国食肉目动物大约有42种是资源动物,其中有9种被列为国家一级保护动物。犬科现存种类计10属35种,我国分布有豺属 Cuon、犬属 Canis、貉属Nyctereutes、狐属 Vulpes 4属6种。狼C.Lupus与豺 C.alpinus为有害动物,其毛皮虽可利用,但价值不大。赤狐 V.vulpes又名红狐、草狐、狐狸,以其毛绒细厚、色泽鲜     

白垩纪中期缅甸琥珀蜚蠊目昆虫一新种(蜚蠊目: 自由蜚蠊科)

文中根据产自白垩纪中期缅甸琥珀中的一块蜚蠊标本,建立一新种Stavba vrsanskyi sp. nov.,归入自由蜚蠊科(Liberiblattinidae)。新种与Stavba babkaeva Vr?anskáand Vr?ansky, 2019不同之处在于其头部近三角形,前翅R脉简单且无二级分支, M脉分支较少。新材料的发现进一步增加了白垩纪缅甸琥珀中蜚蠊的生物多样性。     

中国鸟类一新纪录(鸟纲:红鹳目:红鹳科)

1997年 9月和 11月在参加新疆野生动物考察期间 ,从哈密林业局和乌鲁木齐机场得到大红鹳的照片、资料和标本。当时认为是偶然逸出的个体。通过 1998年深入调查 ,又在不同地点获得了 2号大红鹳标本 ,由此证实为我国鸟类 1新纪录。全球红鹳科鸟类共 5种 ,亚洲仅 2种。其归属一直有争议 ,曾归入鹳形目Ｃｉｃｏｎｉｉｆｏｒｍｅｓ(郑作新 ,1982 ;高玮 ,1992 ;郑光美 ,1997等 )。因其完整的蹼足、喙具栉缘、肉质巨舌、防水羽毛、鸣声似雁 ,甚至包括习性、幼鸟早成性及羽虱等方面的特性 ,现多单另立为红鹳目Ｐｈｏｅｎｉｃｏｐｔｅｒｉｆｏｒｍｅ…     

Quadruplexes of human telomere DNA analogs designed to contain G:A:G:A,G:G:A:A,and A:A:A:A tetrads

Replacement of two to four guanines by adenines in the human telomere DNA repeat dG₃(TTAG₃)₃ did not hinder the formation of quadruplexes if the substitutions took place in the terminal tetrad bridged by the diagonal loop of the intramolecular antiparallel three‐tetrad scaffold, as proved by CD and PAGE in both Na⁺ and K⁺ solutions. Thermodynamic data showed that, in Na⁺ solution, the dG₃(TTAG₃)₃ quadruplex was destabilized, the least by the two G:A:G:A tetrads, the most by the G:G:A:A tetrad in which the adenosines replaced syn‐guanosines. In physiological K⁺ solution, the highest destabilization was caused by the 4A tetrad. In K⁺, only the unmodified dG₃(TTAG₃)₃ quadruplex rearranged into a K⁺‐dependent quadruplex form, none of the multiple adenine‐modified structures did so. This may imply biological consequences for nonrepaired A‐for‐G mutations. © 2010 Wiley Periodicals, Inc. Biopolymers 93: 880–886, 2010.     

Oka: Behind the Barricades: Kanehsatake: 270 Years of Resistance: Spudwrench: Kahnawake Man: My Name is Kahentiiosta: Acts of Defiance

Oka: Behind the Barricades. 1998. 312 minutes. For more information contact the National Film Board of Canada, 3155 Côte de Lisse Rd., St. Laurent, Quebec H4N 2N4. Series of four videos:
Kanehsatake: 270 Years of Resistance. 1993. 120 minutes. Directed by Alanis Obomsawin .
Spudwrench: Kahnawake Man. 1997. 58 minutes. Directed by Alanis Obomsawin .
My Name is Kahentiiosta. 1995. 30 minutes. Directed by Alanis Obomsawin .
Acts of Defiance. 1992. 104 minutes. Directed by Alec MacLeod .     

Experimental demonstration of T:(G:G:G:G):T hexad and T:A:A:T tetrad alignments within a DNA quadruplex stem

A template-based approach was used to design unprecedented architectural motifs into a known DNA framework. The structure formed by the sequence d(GCGGTTGGAT) in 0.1 M Na(+) solution has been determined using molecular dynamics simulations constrained by distance and dihedral restraints derived from NMR experiments. The molecular topology has been previously observed for the sequence d(GCGGTGGAT) (Webba da Silva, M. (2003) Biochemistry 42, 14356-65). Insertion of a single thymine into the double chain reversal formed by the segment GGTGG results in the unprecedented experimental demonstration of a T:(G:G:G:G):T hexad. The bi-stranded hexad results from the pairing alignment of two G(T-G) triads. Each triad results from recognition of the sheared edge of a guanine by the Watson-Crick edge of a thymine of the segment GGTTGG. The alignment is stabilized by base-stacking of the thymine to the sugar pucker of the preceding thymine. The latter is involved in formation of the T:A:A:T tetrad alignment by forming a hydrogen bond with the free amino proton of a Watson-Crick aligned A:A mispair. We have thus established that residues in double chain reversal loops linking juxtaposed tetrads of a quadruplex stem may facilitate formation of yet unknown hydrogen bond alignments. By employing a systematic approach analysis of sequence motifs appearing in double chain reversals, bridging tetrad layers should allow for the prediction of topologies and architectural motifs appearing in biologically relevant genomic regions.