moisture sorption

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• Moisture sorption isotherm — At equilibrium, the relationship between water content and equilibrium humidity of a material can be displayed graphically by a curve, the so called moisture sorption isotherm. For each humidity value, a sorption isotherm indicates the… …   Wikipedia

• Moisture vapor transmission rate — (MVTR), also water vapor transmission rate (WVTR), is a measure of the passage of water vapor through a substance. There are many industries where moisture control is critical. Moisture sensitive foods and pharmeceuticals are put in packaging… …   Wikipedia

• Moisture analysis — covers a variety of methods for measuring moisture content in both high level and trace amounts in solids, liquids, or gases. Moisture in percentage amounts is monitored as a specification in commercial food production. There are many… …   Wikipedia

• Dynamic vapor sorption — (DVS) is a gravimetric technique that measures how quickly and how much of a solvent is absorbed by a sample: such as a dry powder absorbing water. It does this by varying the vapor concentration surrounding the sample and measuring the change in …   Wikipedia

• Water activity — or aw is a measurement of the energy status of the water in a system. It is defined as the vapor pressure of water above a sample divided by that of pure water at the same temperature; therefore, pure distilled water has a water activity of… …   Wikipedia

• Desorption — is a phenomenon whereby a substance is released from or through a surface. The process is the opposite of sorption (that is, either adsorption and absorption). This occurs in a system being in the state of sorption equilibrium between bulk phase… …   Wikipedia

• Dried cherry — Dried cherries Montmorency (left) and Bing (right) Dried cherries are a type of dried fruit. They consist of cherries which have been subjected to a drying process. Contents 1 …   Wikipedia

• Wood drying — (also seasoning lumber or timber seasoning) refers to reducing the moisture content of wood prior to its use. For some purposes wood is not dried at all (it is used green ) [http://en.wikipedia.org/wiki/Green wood] . Often the wood needs to be in …   Wikipedia

• Coal bed methane extraction — (CBM extraction) is a method for extracting methane from a coal deposit. Contents 1 Basic principles 2 Areas with coal bed methane extraction 3 Measuring the gas content of coal …   Wikipedia

• Permeation — Permeation, in physics and engineering, is the penetration of a permeate (such as a liquid, gas, or vapor) through a solid, and is related to a material s intrinsic permeability. Permeability is tested by permeation measurement, for example by a… …   Wikipedia

• Teneur en eau (Milieux poreux) — Pour les articles homonymes, voir Teneur en eau. Représentation schématique des trois phases composant un sol et notations : à droite, les volumes d air, des grains du sol et de l eau ; à gauche, les poids (W pour l anglais weig …   Wikipédia en Français