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There is no standard quantitative definition of hygroscopicity, so generally the qualification of hygroscopic and non-hygroscopic is determined on a case-by-case basis. For example, pharmaceuticals that pick up more than 5% by mass, between 40 and 90% relative humidity at 25 °C, are described as hygroscopic, while materials that pick up less ...
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
On the other hand, these statements appear to flatly contradict the assertion in the WP article on Hygroscopy, which states that "An example of a hygroscopic substance is biodiesel, which absorbs water to about 1200 parts per million (PPM)." I checked around and found that this claim is repeated widely on numerous websites, but I could not find ...
The Hygroscopic Cycle is a concept that has evolved recently and is at the heart of intensive research on hygroscopic fluids. Recent developments have been the Kalina cycle , [ 17 ] but with the actual configuration, it is expected to have an impact in locations with poor access to water, and a good integration with combined cycle plants, and ...
Xerochasy is dehiscence that occurs upon drying, and hygrochasy is dehiscence that occurs upon wetting, the fruit being hygroscopic. Dehiscent fruits that are derived from one carpel are follicles or legumes, and those derived from multiple carpels are capsules or siliques. [3] One example of a dehiscent fruit is the silique.
The basic components of heat and moisture exchangers are foam, paper, or a substance which acts as a condensation and absorption surface. The material is often impregnated with hygroscopic salts such as calcium chloride, to enhance the water-retaining capacity. HMEs used for laryngectomees are mostly hygroscopic.
Splay can be avoided by keeping moisture out of plastics and injection molding machines. Non-hygroscopic plastics that do not absorb moisture are less likely to suffer from splay. Mold leaks, improper drying of materials, incorrect material throughput, and non-functional dryers are other causes of moisture-related splay.
Schedorhinotermes termites use hydrophilic surfaces on body and wings to attach themselves to plants they colonize.. A hydrophile is a molecule or other molecular entity that is attracted to water molecules and tends to be dissolved by water.