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21Mass spectrometry — (MS) is an analytical technique that measures the mass to charge ratio of charged particles.[1] It is used for determining masses of particles, for determining the elemental composition of a sample or molecule, and for elucidating the chemical… …
22Water supply and sanitation in the Philippines — ervice qualityContinuity of supplyIn 2004, water supply was available on average for 18 hours each day in the West Zone of Metro Manila and 21 hours in the East Zone. According to their respective websites, the utility responsible for water… …
23Mathematics 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… …
24Reflection high energy electron diffraction — (RHEED) is a technique used to characterize the surface of crystalline materials. RHEED systems gather information only from the surface layer of the sample, which distinguishes RHEED from other materials characterization methods that rely also… …
25mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph …
26Wikipedia:Featured article candidates — Here, we determine which articles are to be featured articles (FAs). FAs exemplify Wikipedia s very best work and satisfy the FA criteria. All editors are welcome to review nominations; please see the review FAQ. Before nominating an article,… …
27Anaxagoras and the atomists — C.C.W.Taylor ANAXAGORAS In the course of the fifth century BC the political and cultural pre eminence of Athens attracted to the city a considerable number of intellectuals of various kinds from all over the Greek world. This phenomenon, the so… …
28Miscegenation — Race Classification Race (classification of humans) Genetics …
29Sperm donation — is the provision (or ‘donation’) by a man, (known as a ‘sperm donor’), of his sperm, with the intention that it be used to impregnate a woman who is not usually the man s sexual partner, in order to produce a child. A sperm donor is the natural… …
30The KLF — Infobox musical artist Name = The KLF Img capt = Img size = Landscape = Background = group or band Alias = The Justified Ancients of Mu Mu, The JAMs, The Timelords Origin = London, England Years active = 1987–1992, 1995, 1997 Label = KLF, Arista …
