absorption négative
101Radio propagation — is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. [ H. P. Westman et al, (ed), Reference Data for Radio Engineers, Fifth Edition , 1968, Howard W. Sams and Co.,… …
102Buddhism — Buddh redirects here, for the Race Circuit, see Buddh International Circuit Standing Buddha. One of the earliest known representations of the Buddha, 1st 2nd century CE, Gandhara …
103Terra preta — L oxisol (à gauche) et la Terra Preta (à droite) La terre noire (terra preta en portugais) est un type de sol sombre d’origine humaine et d une fertilité exceptionnelle due à des concentrations particulièrement …
104reaction — 1. The response of a muscle or other living tissue or organism to a stimulus. 2. The color change effected in litmus and certain other organic pigments by contact with substances such as acids or alkalies; also the property that such substances… …
105CIRCULATOIRE (APPAREIL) — Au cours du développement humain, l’appareil circulatoire est l’un des premiers à s’ébaucher. Ce fait traduit l’importance vitale du flux circulatoire dès le début de l’embryogenèse. Il alimente en effet les tissus en formation et draine les… …
106rate — The cost of debt service paid by a borrower or issuer to a lender or investor. The rate is expressed as an annual percentage of the amount borrowed. For some notes and bonds that pay interest semiannually, the semiannual interest due to the… …
107subatomic particle — or elementary particle Any of various self contained units of matter or energy. Discovery of the electron in 1897 and of the atomic nucleus in 1911 established that the atom is actually a composite of a cloud of electrons surrounding a tiny but… …
108Eugenics — is the self direction of human evolution : Logo from the Second International Eugenics Conference, 1921, depicting Eugenics as a tree which unites a variety of different fields.[1] Eugenics is the applied science or the bio social movement which… …
109hormone — hormonal, hormonic /hawr mon ik, moh nik/, adj. /hawr mohn/, n. 1. Biochem. any of various internally secreted compounds, as insulin or thyroxine, formed in endocrine glands, that affect the functions of specifically receptive organs or tissues… …
110chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… …
