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Parachor is a scientific quantity defined according to the formula: :P = γ1/4 M / d where γ1/4 is the fourth root of surface tension, M is the molar mass, and d is the density. ''it is a constitutive and additive property'' Parachor "has been used in solving various structural problems".〔O. Exner. "Conception and Significance of the Parachor." Nature, 1 December 1962, vol. 196, pages 890-1.〕 == References == As a part of a broader scheme dealing with empirical equations in organic chemistry, the parachor was also revised. Parachor is defined in equation (1), where y is the surface tension, d denotes the density and M the molecular weight: This expression is considered to be an additive quantity, that is, can be approximately expressed as a sum of empirical increments Pi corresponding to the single atoms or groups in the molecule. As an additive quantity the parachor has been used in solving various structural problems. (parachor can be used to justify structure) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Parachor」の詳細全文を読む スポンサード リンク
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