laser active substance
51MAGNÉTISME — Le magnétisme est l’un des phénomènes qui a le plus frappé l’imagination de l’homme, au point que ce mot désigne aujourd’hui des réalités très diverses: il s’agit d’abord d’une science fort ancienne et néanmoins toujours d’actualité dont le champ …
52geology — /jee ol euh jee/, n., pl. geologies. 1. the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is… …
53eye disease — Introduction any of the diseases or disorders that affect the human eye (eye, human). This article briefly describes the more common diseases of the eye and its associated structures, the methods used in examination and diagnosis, and the… …
54Cat — For other uses, see Cat (disambiguation) and Cats (disambiguation). Domestic cat[1] …
55Radioactive waste — 2007 ISO radioactivity danger logo, designed in part for long term radioactive waste depositories which might survive into a far future time in which all knowledge of the meaning of present common radiation danger symbols and signs has been lost… …
56Phoenix (spacecraft) — This article is about the Mars lander. For the Star Trek spacecraft, see Phoenix (Star Trek). For other uses, see Phoenix (disambiguation). Phoenix Mars Mission Artist s impression of the Phoenix spacecraft as it lands on Mars Operator NASA …
57Photoelectrochemical processes — Photons emitted in a coherent beam from a laser Composition {{{composition}}} Interactions Electromagnetic, Optical, C …
58PEAU — La peau est un tissu de revêtement qui enveloppe le corps et le maintient, tout en le protégeant contre les agressions extérieures; mais c’est aussi un véritable organe, possédant des fonctions sensorielles (toucher) et mettant en œuvre de… …
59Dental caries — This article is about dental caries in humans. To read about dental caries in other animals, please see dental caries (non human). Dental caries Classification and external resources Destruction of a tooth by cervical decay from dental caries.… …
60Holtzman effect — The Holtzman effect [In Terminology of the Imperium , the glossary of the novel Dune , Frank Herbert defined the Holtzman effect itself as the negative repelling effect of a shield generator. Interpreting this in conjunction with Herbert s… …
