radiation decomposition
61Nobel Prizes — ▪ 2009 Introduction Prize for Peace The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …
62SYSTÈMES DE TRANSFORMATIONS (THÉORIE DES) — Élaborée dans une optique interdisciplinaire, la théorie des systèmes de transformations propose un formalisme suffisamment général pour être applicable à des champs d’investigation que l’évolution des sciences, dans son mouvement vers une… …
63climate change — Introduction periodic modification of Earth s climate brought about as a result of changes in the atmosphere as well as interactions between the atmosphere and various other geologic, chemical, biological, and geographic factors within the Earth …
64Boron nitride — IUPAC name Boron nitride Identifiers …
65Microorganism — Microbe redirects here. For other uses, see Microbe (disambiguation). A cluster of Escherichia coli …
66Loudspeaker — For other uses, see Loudspeaker (disambiguation). An inexpensive, low fidelity 3½ inch speaker, typically found in small radios …
67Mushroom cloud — created by smoke billows Ascending cloud from Redoubt Vol …
68Laser safety — A typical laser warning symbol. Laser safety is safe design, use and implementation of lasers to minimize the risk of laser accidents, especially those involving eye injuries. Since even relatively small amounts of laser light can lead to… …
69Lotic ecosystems — are the ecosystems of rivers, streams and springs. Included in these environments are the biotic interactions (amongst plants, animals and micro organisms) together with the abiotic interactions (physical and chemical). [Angelier (2003)] Lotic… …
70Champ D'induction Magnétique — Champ magnétique Vue d artiste de la magnétosphère terrestre …
