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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Evapoporometry ： ウィキペディア英語版 Evapoporometry Evapoporometry is a method used to determine pore-size in synthetic membranes. Based on the kelvin equation, this technique is most accurate for determination of pore diameters between 4 nm to 150 nm.〔 〕 ==Theory== Evapoporometry uses modified forms of the kelvin equation to relate the evaporation of a volatile liquid (usually 2-propanol) from a membrane to the average diameter of the pores in that membrane.〔 The first modified equation used in this technique is: $ln\; =\; -$ Where $p\text{'}A$ is the instantaneous vapor pressure of the volatile liquid, $p^A$ is the normal vapor pressure, $y$ is the surface tension, $V\_\backslash text$ is the liquid molar volume, $R$ is the gas constant, $T$ is the absolute temperature, and $d$ is the pore diameter.〔 Since these pressures can be expressed as mole fractions, the equation is further modified to relate these mole fractions to evaporation rate in the following equation: Where $X\_\backslash text$ and $X^\_\backslash text$ are mole fractions, $W\_\backslash text$ is the evaporation rate during pore draining, $W^\_\backslash text$ is the evaporation rate of the initial liquid film over the membrane, $d\_\backslash text$ is the diameter of the testing cell, and $k\_\backslash text$ is a constant.〔 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「Evapoporometry」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.