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Encyclopedia > Desiccation

Desiccation is the state of extreme dryness, or the process of extreme drying. It is an extreme form of dehydration (though dessication is not a medical condition). Dehydration is the removal of water (hydor in ancient Greek) from an object. ...


A desiccant is a substance that adsorbs water. It is most commonly used to remove humidity that would normally degrade or even destroy products sensitive to moisture. Silica gel, Calcium sulfate, montmorillonite clay, and molecular sieves are commonly used as desiccants. In chemistry, adsorption of a substance is its concentration on a particular surface. ... Water (from the Old English word wæter; c. ... Humidity is the concentration of water vapor in the air. ... Some examples of silica gel sachets Silica gel is a granular, porous form of silica made synthetically from sodium silicate. ... Calcium sulfate is a common laboratory and industrial chemical. ... Montmorillonite is a very soft phyllosilicate mineral that typically forms in microscopic crystals, forming a clay. ... Quaternary clay in Estonia. ... A molecular sieve is a material containing tiny pores of a precise and uniform size that is used as an adsorbent for gases and liquids. ...

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Science

In science, a desiccator is a glass jar used in practical chemistry for making or keeping small amounts of material very dry. The material is placed on a shelf, and a drying agent or desiccant, such as dry silica gel or anhydrous caustic soda, is placed below the shelf. Wikimedia Commons has media related to: Science For the scientific journal named Science, see Science (journal). ... This article refers to the material. ... Chemistry (derived from the Arabic word kimia, alchemy, where al is Arabic for the) is the science that deals with the properties of organic and inorganic substances and their interactions with other organic and inorganic substances. ... Some examples of silica gel sachets Silica gel is a granular, porous form of silica made synthetically from sodium silicate. ... Sodium hydroxide (NaOH), also known as caustic soda or lye in North America, is a caustic metallic base used in industry (mostly as a strong chemical base) in the manufacture of paper, textiles, and detergents. ...


Often some sort of humidity indicator is included in the desiccator to show, by color changes, the level of humidity. These indicators are in the form of indicator plugs or indicator cards. The active chemical is cobalt chloride (CoCl2). Anhydrous cobalt chloride is blue. When it bonds with two water molecules, (CoCl2•2H2O), it turns purple, and its hexahydrate form (CoCl2•6H2O) is pink. Humidity is the concentration of water vapor in the air. ... Cobalt(II) chloride (CoCl2) is a chemical compound composed of cobalt and chlorine. ... Liquids and solids (powders) are anhydrous if they are without water, i. ...


Broadcasting

In broadcast engineering, a desiccator may be used to pressurize the feedline of a high-power broadcast station. Because it carries very high electrical power levels from the transmitter to the antenna, the feedline must have a good dielectric. Because it must also be lightweight so as not to overload the radio tower, air is often used as the dielectric. Since moisture can condense in these lines, desiccated air or nitrogen gas is pumped in. This pressure also keeps water or other dampness from coming in the line at any point along its length. Broadcast engineering is the field of electrical engineering, and now to some extent radio and television broadcasting. ... Wiktionary has a definition of: Pressurization Pressurization generally refers to the application of pressure in a given situation or environment; and more specifically refers to the process by which atmospheric pressure is maintained in an isolated or semi-isolated atmospheric environment (for instance, in an aircraft, or whilst Scuba diving). ... The word feed has a number of uses: Feeding is supplying food. ... A broadcast station may be: a radio station a television station It does not include television networks or radio networks. ... Transmission lines in Lund, Sweden Electric power, often known as power or electricity, involves the production and delivery of electrical energy in sufficient quantities to operate domestic appliances, office equipment, industrial machinery and provide sufficient energy for both domestic and commercial lighting, heating, cooking and industrial processes. ... Antenna tower of Crystal Palace transmitter, London A transmitter (sometimes abbreviated XMTR) is an electronic device which with the aid of an antenna propagates an electromagnetic signal such as radio, television, or other telecommunications. ... A yagi antenna Most simply, an antenna (U.S.) or aerial (UK) is an electronic component designed to transmit or receive radio waves. ... A dielectric, or electrical insulator, is a substance that is highly resistant to the flow of electric current and has a relative permittivity greater than unity. ... Masts of the Rugby VLF transmitter in England Radio masts and towers are, typically, tall structures designed to support antennas (also known as aerials in the UK) for telecommunications and broadcasting, including television. ... Moisture generally refers to the presence of water in trace amounts. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... General Name, Symbol, Number nitrogen, N, 7 Chemical series nonmetals Group, Period, Block 15, 2, p Appearance colorless Atomic mass 14. ... A gas is one of the four main phases of matter (after solid and liquid, and followed by plasma), that subsequently appear as a solid material is subjected to increasingly higher temperatures. ... Pressure (symbol: p) is the force per unit area acting on a surface in a direction perpendicular to that surface. ... Water (from the Old English word wæter; c. ... DAMP can stand for: Deficits in Attention, Motor Control and Perception Disk array Management Program, a Hitachi software program for manage disk storage array This article consisting of a 4-letter acronym or initialism is a disambiguation page — a list of pages that otherwise might share the same title. ...


Other uses

Desiccated coconut is the dried, finely shredded flesh of the coconut, much used in cooking desserts. It is also used in other types of food preservation. Binomial name Cocos nucifera L. The Coconut Palm (Cocos nucifera), is a member of the Family Arecaceae (palm family). ... Cooking is the act of preparing food for consumption. ... WINKY DESSERTS!!!!!! ... Various preserved foods Food preservation is the process of treating and handling food in such a way as to stop or greatly slow down spoilage to prevent foodborne illness while maintaining nutritional value, texture and flavor. ...


Mild desiccation of the air can be accomplished with a dehumidifier. A dehumidifier is a household appliance that reduces the level of humidity in a room. ...


Rice is an effective household desiccant.


Desiccants can also be used in environmentally friendly air conditioning systems.


External links


  Results from FactBites:
 
Appropriate desiccant selection can improve product (IVDT archive, Jun 02) (2882 words)
Desiccant canisters are considered the gold standard among the desiccants used in the pharmaceutical industry.
Desiccant cap inserts are used in conjunction with screw-on caps for rigid containers.
Absorption capacity is measured by exposing the desiccant to specified, static conditions and observing its weight increase, which is given as a percentage of the desiccant weight.
Desiccation - Wikipedia, the free encyclopedia (343 words)
Desiccation is the state of extreme dryness, or the process of extreme drying.
A desiccant is a substance that adsorbs water.
Desiccated coconut is the dried, finely shredded flesh of the coconut, much used in cooking desserts.
  More results at FactBites »

 
 

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