翻訳と辞書 Words near each other ・ Membrane emulsification ・ Membrane estrogen receptor ・ Membrane fluidity ・ Membrane fouling ・ Membrane fusion protein ・ Membrane gas separation ・ Membrane glucocorticoid receptor ・ Membrane glycoproteins ・ Membrane keyboard ・ Membrane lipids ・ Membrane method ・ Membrane mineralocorticoid receptor ・ Membrane mirror ・ Membrane models ・ Membrane nanotube ・ Membrane osmometer ・ Membrane oxygenator ・ Membrane paradigm ・ Membrane potential ・ Membrane Pro-X carboxypeptidase ・ Membrane progesterone receptor ・ Membrane protein ・ Membrane Protein Structural Dynamics Consortium ・ Membrane reactor ・ Membrane roofing ・ Membrane ruffling ・ Membrane sex steroid receptor ・ Membrane stabilizing effect ・ Membrane steroid receptor ・ Membrane structure Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Membrane osmometer ： ウィキペディア英語版 Membrane osmometer A membrane osmometer is a device used to indirectly measure the number average molecular weight ($M\_n$) of a polymer sample. One chamber contains pure solvent and the other chamber contains a solution in which the solute is a polymer with an unknown $M\_n$. The osmotic pressure of the solvent across the semipermeable membrane is measured by the membrane osmometer. This osmotic pressure measurement is used to calculate $M\_n$ for the sample. == Basic operation == A low concentration solution is created by adding a small amount of polymer to a solvent. This solution is separated from pure solvent by a semipermeable membrane. Solute cannot cross the semipermeable membrane but the solvent is able to cross the membrane. Solvent flows across the membrane to dilute the solution. The pressure required to stop the flow across the membrane is called the osmotic pressure.〔 The osmotic pressure is measured and used to calculate $M\_n$. In an ideally dilute solution, van ‘t Hoff’s law of osmotic pressure can be used to calculate $M\_n$ from osmotic pressure.〔 :$\backslash lim\_\; \backslash Big(\; \backslash Big)\; =\; \backslash over\; M\_n\}$ $M\_n$, number average molecular weight, mass/mole $R$, gas constant $T$, absolute temperature, typically Kelvin $c$, concentration of polymer, mass/volume $\backslash Pi$, osmotic pressure 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「Membrane osmometer」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.