ion mean life

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• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• Ion Creangă — Creangă redirects here. For other uses, see Creangă (surname). Ion Creangă Nică al lui Ştefan a Petrei Ion Torcălău Ioan Ştefănescu Born 1837 or 1839 Târgu Neamţ Died …   Wikipedia

• Ion Negoiţescu — Born August 10, 1921(1921 08 10) Cluj Died February 6, 1993(1993 02 06) (aged 71) Munich Pen name …   Wikipedia

• Half-life — This article is about the scientific and mathematical term. For other uses, see Half life (disambiguation). Number of half lives elapsed Fraction remaining Percentage remaining 0 1/1 100 1 1/2 50 2 …   Wikipedia

• radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …   Universalium

• Alzheimer's disease — Alzheimer redirects here. For other uses, see Alzheimer (disambiguation). Alzheimer s disease Classification and external resources …   Wikipedia

• subatomic 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… …   Universalium

• radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …   Universalium

• Plato: aesthetics and psychology — Christopher Rowe Plato’s ideas about literature and art and about beauty (his ‘aesthetics’) are heavily influenced and in part actually determined by his ideas about the mind or soul (his ‘psychology’).1 It is therefore appropriate to deal with… …   History of philosophy

• Glossary of fuel cell terms — The Glossary of fuel cell terms lists the definitions of many terms used within the fuel cell industry. The terms in this glossary may be used by fuel cell industry associations, in education material and fuel cell codes and standards to name but …   Wikipedia

• Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   Universalium