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A defoamer or an anti-foaming agent is a chemical additive that reduces and hinders the formation of foam in industrial process liquids. The terms anti-foam agent and defoamer are often used interchangeably. Strictly speaking, defoamers eliminate existing foam and anti-foamers prevent the formation of further foam.
The first use of corona discharge to remove particles from an aerosol was by Hohlfeld in 1824. [2] However, it was not commercialized until almost a century later. In 1907 Frederick Gardner Cottrell, a professor of chemistry at the University of California, Berkeley, applied for a patent on a device for charging particles and then collecting them through electrostatic attraction—the first ...
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D3O is the namesake ingredient brand of British company D3O Lab, specializing in rate-sensitive impact protection technologies. [1] The brand comprises more than 30 technologies and materials, including set foams, formable foams, set elastomers, and formable elastomers. [2] D3O is sold in more than 50 countries. [3]
In laboratory use, the most common desiccators are circular and made of heavy glass. There is usually a removable platform on which the items to be stored are placed. The desiccant, usually an otherwise-inert solid such as silica gel, fills the space under the platform. Colour changing silica may be used to indicate when it should be refreshed.
In the laboratory, this solution is sometimes used to clean glassware, though it is discouraged in many institutions and it should not be used routinely due to its dangers. [10] Unlike chromic acid solutions, piranha does not contaminate glassware with Cr 3+ ions. Piranha solution is particularly useful when cleaning sintered (or "fritted ...
The "dew point temperature" is an absolute measure of the moisture in air. Some facilities are being designed with dew points in the lower 50s °F, and some in the upper and lower 40s °F. [citation needed] Some facilities are being designed using desiccant wheels with gas-fired heaters to dry out the wheel enough to get the required dew points.