科学家发现一肥胖基因可使人无饱肚感

据东方网2008年7月29日援引中国新闻网消息,科学家对3337名儿童所作的最新研究显示,一个名为FTO的基因与肥胖有关是因为它可使人失去饱肚感,不能对自己的食欲进行正常控制。一般来说,饮食会“关闭”食欲,并产生一种满足感或“饱肚”感。但FTO基因却阻止这种感觉的发生。FTO是一个在自种人口中识别出来的普通肥胖基因,携有该基因之高风险变种的人士,体形会较大。     

变种超方体的超边连通度

超边连通度是一种衡量互联网络容错能力的重要参数,本文确定了变种超方体的1-超边连通度和2-超边连通度分别为2n-2和3n-4。     

新疆药用贝母新植物

Thirteen new varieties of the genus Fritillaria (Liliaceae) are described trom Xinjiang, China.     

官场腐败又有新变种

在某些地方．领导开会有出场费，讲话发言给稿费，这已成为一种普遍现象。此外还有什么剪彩费、授课费、题字费、形象费等．在某些官员的眼里．这笔费用理所当然是他应得的酬金．是名正言顺的收入。     

河南槭叶铁线莲(毛茛科)一新变种——无裂槭叶铁线莲

报道了槭叶铁线莲一新变种——无裂槭叶铁线莲Clematis acerifolia Maxim. var. elobata S. X. Yan。该变种与原变种不同在于植株较矮,高不超过20 cm,叶卵形至宽卵形,不分裂,基部宽楔形至近截形,边缘具不规则锯齿。     

乌蒙杓兰及其近亲种

 In addition to describing a new species, Cypripedium wumengense, as well as a new variety, C. bardolphianum var. zhongdianense,  nomenclatural and taxonomic notes are made on its allies and the division to which they belong.  They are ltrge]y found in the Hengduan Mountains in southwestern China, characterized by the absence of bract, havirg lip more or less covered with small wart-like outgrowths, and that as the capsule matures the scape becomes much elongated.  Six species of this group have hitherto been reported, of which, however, C. ebracteatum and C. nutans are regarded here as conspecific with C. fargesii and C. bardolphianum respectively. Thus, including the new taxa described here, it composes five species and one variety: C. bardolphianum W. W. Sm. et Farrer (var. bardolphianum and var. zhongdianense S. C. Chen), C. mic- ranthum Franch., C. fargesii Franch., C. margaritaceum Franch. and C. wumengense S. C. Chen.  They are all grouped here into the same section, Sect.  Trigonopedium (Franch.) Pfitz., the oldest legitimate name of this group in the rank of section.     

奇事异闻

植物自己也能制造除草剂美国研究人员发现酥油草的变种是一种奇异的草本植物,它能够自己制造出能抑制并杀灭周围杂草的天然广谱除草剂。这给人类发明更加有效和环保的除草剂带来了希望。     

西藏蓝藻门新植物

Cyanophyta of Xizang,  Clastidium sicyoideum,  Phormidium valderia- num var longiarticulatum,  P. valderianum var validum,  Lyngbya plicata,  Homoeo- thrix lyngbyoides,  Hammatoidea xizangensis,  Rivularia thermalis,  Calothrix alternans, C. polymorpha