other cyclic hydrocarbons
41RP-1 — (alternately, Rocket Propellant 1 or Refined Petroleum 1) is a highly refined form of kerosene outwardly similar to jet fuel, used as a rocket fuel. Although having a lower specific impulse than liquid hydrogen (LH2) and thus less thrust per unit …
42Messinian salinity crisis — Events of the Cenozoic view • discuss •  …
43polymer, inorganic — Introduction any of a class of large molecules that lack carbon and are polymers that is, made up of many small repeating units called monomers (monomer). The word polymer is derived from the Greek term poly, meaning many, and meros, which means …
44sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …
45Polygon — For other uses, see Polygon (disambiguation). Some polygons of different kinds In geometry a polygon (   …
46Effects of cannabis — Short term effects of cannabis Classification and external resources ICD 10 F12.0 The effects of cannabis are caused by cannabinoids, most notably tetrahydrocannabinol (THC). Cannabis has both psychological and physiological effects on the human… …
47compound — 1. In chemistry, a substance formed by the covalent or electrostatic union of two or more elements, generally differing entirely in physical characteristics from any of its components. 2. In pharmacy, denoting a preparation containing several… …
48Chemical reaction — Chemical reactions redirects here. For the 2007 television episode, see Chemical Reactions (Men in Trees). A thermite reaction using iron(III) oxide. The sparks …
49Ether — This article is about a general class of organic compounds. For the specific compound, see diethyl ether. For the computer network technology, see ethernet. For the antiquated physics concept, see Luminiferous aether. For other uses, see Aether… …
50IUPAC nomenclature of organic chemistry — The IUPAC nomenclature of organic chemistry is a systematic method of naming organic chemical compounds as recommended[1] by the International Union of Pure and Applied Chemistry (IUPAC). Ideally, every possible organic compound should have a… …
