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nucleotide

(Encyclopedia)nucleotide no͞oˈklēətīdˌ, nyo͞oˈ– [key], organic substance that serves as a monomer in forming nucleic acids. Nucleotides consist of either a purine or a pyrimidine base, a ribose or deoxyri...

Butler, Joseph

(Encyclopedia)Butler, Joseph, 1692–1752, English bishop and exponent of natural theology. Butler held a series of church offices, ending his career as bishop of Durham. His principle writings are Fifteen Sermons ...

Williams, Sir Bernard

(Encyclopedia)Williams, Sir Bernard (Sir Bernard Arthur Owen Williams), 1929–2003, English philosopher, grad. Oxford (1951). One of the most important philosophers of his era, he is credited with reviving the fie...

safety lamp

(Encyclopedia)safety lamp, oil lamp designed for safe use in mines and other places where flammable gases such as firedamp (see damp) may be present. Its invention (c.1816) is usually attributed to Sir Humphry Davy...

Scheler, Max

(Encyclopedia)Scheler, Max mäks shāˈlər [key], 1874–1928, German philosopher. He taught at the universities of Jena (1901–7) and Munich (1907–10), where he was influenced by Franz Brentano and the followe...

serial music

(Encyclopedia)serial music, the body of compositions whose fundamental syntactical reference is a particular ordering (called series or row) of the twelve pitch classes—C, C#, D, D#, E, F, F#, G, G#, A, A#, B—t...

Simon, Jules

(Encyclopedia)Simon, Jules zhül sēmôNˈ [key], 1814–96, French statesman. His full name was Jules François Simon Suisse. He taught philosophy at the Sorbonne from 1839 to 1852, during which time he edited the...

echo sounder

(Encyclopedia)echo sounder, an older instrumentation system for indirectly determining ocean floor depth. Echo sounding is based on the principle that water is an excellent medium for the transmission of sound wave...

dualism

(Encyclopedia)dualism, any philosophical system that seeks to explain all phenomena in terms of two distinct and irreducible principles. It is opposed to monism and pluralism. In Plato's philosophy there is an ulti...

common-ion effect

(Encyclopedia)common-ion effect, decrease in solubility of an ionic salt, i.e., one that dissociates in solution into its ions, caused by the presence in solution of another solute that contains one of the same ion...