Révision du genre Perrindema Lacroix 1997 (Insecta : Coleoptera : Scarabaeoidea : Melolonthidae : Pachydeminae)

La synonymie entre Perrindema Lacroix 1997, et Zanitanus Lacroix 2001, est proposée. Le genre Perrindema est révisé. Une nouvelle combinaison est établie pour Cephaloncheres lindiensis Moser 1919. Deux nouvelles espèces sont décrites du Mozambique : Perrindema quiterajoensis n. sp. et P. pembaensis n. sp. Un historique du genre est donné ainsi qu’une clé de détermination. La position systématique de ce genre au sein des Pachydemini Burmeister 1855, est discutée. La conservation de l’utilisation du nom Pachydeminae au détriment de Tanyproctinae Erichson 1847, est argumentée.     

In Memoriam: Ivan Daskalov: 1933 – 2004

Ivan Daskalov [1933–2004] was a friend who will be missed by many. Neither the quality of a man nor the concept of a friendship can be defined with words. We may only say that both will be missed.     

抗癌基因:Rb

介绍有关视网膜母细胞瘤(Retinoblastoma,简称Rb)基因研究的最新进展。已经证明Rb基因异常与某些肿瘤发生密切相关。其编码产物具有抑制细胞增殖 和细胞转化作用,可能是一个具有DNA结合活性的细胞生长负调控因子。Rb基因作为抗癌基因在肿瘤分子生物学研究中已引起人们的普遍重视。     

A Review of: “Images: A Reader”

Photographs are a ubiquitous feature of Aboriginal life in Northeastern Australia, with images of relatives being prominently displayed in most Aboriginal houses. This display of photographs is tied to a form of distributed personhood that draws on photographs to create a sense of social immediacy in the absence of close kin. This sense of immediacy also occurs in relation to photographs of the dead, giving these images a particular force for Aboriginal viewers. But further consideration of this force of photographic images suggests that they should be treated neither as things nor as aspects of persons, despite their seeming ability to manifest agency in Aboriginal life-worlds.     

Commentary: Vitamin C: Antioxidant or Pro-Oxidant In Vivo?

Ascorbic acid has a multiplicity of antioxidant properties, but it can exert pro-oxidant effects in vitro, usually by interaction with transition metal ions. It is as yet uncertain that these pro-oxidant effects have any biological relevance: some of the available data are summarized.     

虫草:引发祸患

伴随着牧场上涌入挖虫草的人群，以及采金者，河水渐渐变得浑浊起来，这都根源于人的贪欲。     

七绝:海百合化石

似花似叶意朦胧,似茎似根出浪中。玉立亭亭海百合,装璜昔日水晶宫。七绝:海百合化石@曹新华$北京房山区燕山石油化工公司设计院机械设备室!邮编:102500)