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hygroscopic | A Wisdom Archive on hygroscopic | | hygroscopic A selection of articles related to hygroscopic | |
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hygroscopic, Hygroscopic, Hygroscopic - Building physics, Hygroscopic - History, Deliquescent
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| ARTICLES RELATED TO hygroscopic | | | |  hygroscopic: Encyclopedia II - Erythritol - Physical Properties
Erythritol - Heat of Solution.
Erythritol has a strong cooling effect (negative heat of solution) when it dissolves in water, which combines superbly with mint flavors, but often proves distracting with more subtle flavors and textures. The cooling effect is only present when erythritol is not already dissolved in water, a situation that might be experienced in an erythritol-sweetened frosting, chocolate bar, chewing gum, or hard candy. When combined with solid fats, such as coconut oil, cocoa butter or cow's but ...
See also:Erythritol, Erythritol - Erythritol and Human Digestion, Erythritol - Physical Properties, Erythritol - Heat of Solution, Erythritol - Taste & Synergistic Sweetening, Erythritol - Blending for Sugar-Like Properties, Erythritol - Erythritol and Bacteria Read more here: » Erythritol: Encyclopedia II - Erythritol - Physical Properties |
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| | | | | hygroscopic: Encyclopedia II - Polyethylene terephthalate - Uses The main virtue of PET is that it is fully recyclable. Unlike other plastics, its polymer chains can be recovered for additional use. PET has a resin identification code of 1.
PET can be semi-rigid to rigid, depending on its thickness, and is very lightweight. It makes a good gas and fair moisture barrier, as well as a good barrier to alcohol (requires additional "Barrier" treatment) and solvents. It is strong and impact-re ...
See also:Polyethylene terephthalate, Polyethylene terephthalate - Uses, Polyethylene terephthalate - Intrinsic viscosity, Polyethylene terephthalate - Drying, Polyethylene terephthalate - Copolymers, Polyethylene terephthalate - Crystals, Polyethylene terephthalate - Degradation, Polyethylene terephthalate - Re-crystallization experiment, Polyethylene terephthalate - Processing Equipment Read more here: » Polyethylene terephthalate: Encyclopedia II - Polyethylene terephthalate - Uses |
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| | | | | | | hygroscopic: Encyclopedia II - Moisturizer - Mechanism of action Moisturizers act on the most external of the skin layers, the so-called corneal stratum (stratum corneum, the anatomical term in Latin), which is largely formed by squamous cells or keratinocytes (an epithelial layer which is quite dynamic, i.e., it is being constantly shed and replaced by the growth of new cells coming from the deeper layers of the skin, therefore its name). Most, if not all, agents present in moisturizers are unable to penetrate ...
See also:Moisturizer, Moisturizer - Mechanism of action, Moisturizer - Composition, Moisturizer - Adverse effects, Moisturizer - Reference Read more here: » Moisturizer: Encyclopedia II - Moisturizer - Mechanism of action |
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| | | | | | | | | | hygroscopic: Encyclopedia II - Wood - Formation A tree increases in diameter by the formation, between the old wood and the inner bark, of new woody layers which envelop the entire stem, living branches, and roots. Where there are clear seasons, this can happen in a discrete pattern, leading to what is known as growth rings, as can be seen on the end of a log. If these seasons are annual these growth rings are annual rings. Where there is no seasonal difference gro ...
See also:Wood, Wood - Uses, Wood - Formation, Wood - Knots, Wood - Heartwood and sapwood, Wood - Different woods, Wood - Color, Wood - Structure, Wood - Water content Read more here: » Wood: Encyclopedia II - Wood - Formation |
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| | | | | hygroscopic: Encyclopedia II - Wood - Water content Water occurs in living wood in three conditions, namely: (1) in the cell walls, (2) in the protoplasmic contents of the cells, and (3) as free water in the cell cavities and spaces. In heartwood it occurs only in the first and last forms. Wood that is thoroughly air-dried retains from 8-16% of water in the cell walls, and none, or practically none, in the other forms. Even oven-dried wood retains a small percentage of moisture, but for all except chemical purpo ...
See also:Wood, Wood - Uses, Wood - Formation, Wood - Knots, Wood - Heartwood and sapwood, Wood - Different woods, Wood - Color, Wood - Structure, Wood - Water content Read more here: » Wood: Encyclopedia II - Wood - Water content |
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| | | | | | hygroscopic: Encyclopedia II - Shielded metal arc welding - Process variations Though SMAW is almost exclusively a manual arc welding process, one notable process variation exists, known as gravity welding or gravity arc welding. It serves as an automated version of the traditional shielded metal arc welding process, employing an electrode holder attached to an inclined bar along the length of the weld. Once started, the process continues until the electrode is spent, allowing the operator to manage multiple gravity welding systems. The electrodes employed (often E6027 or E7024) are coated heavily in flux, and are typi ...
See also:Shielded metal arc welding, Shielded metal arc welding - Development, Shielded metal arc welding - Operation, Shielded metal arc welding - Quality, Shielded metal arc welding - Safety, Shielded metal arc welding - Application, Shielded metal arc welding - Equipment, Shielded metal arc welding - Power supply, Shielded metal arc welding - Electrode, Shielded metal arc welding - Process variations, Shielded metal arc welding - Notes Read more here: » Shielded metal arc welding: Encyclopedia II - Shielded metal arc welding - Process variations |
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| | | | | hygroscopic: Encyclopedia II - Shielded metal arc welding - Operation The actual welding technique utilized depends on the electrode, the composition of the workpiece, and the position of the joint being welded. The choice of electrode and welding position also determine the welding speed. Flat welds require the least operator skill, and can be done with electrodes that melt quickly but solidify slowly. This permits higher welding speeds. Sloped, vertical or upside-down welding requires more operator skill, and often necessitates the use of an electrode that solidifies quickly to prevent the molten metal from ...
See also:Shielded metal arc welding, Shielded metal arc welding - Development, Shielded metal arc welding - Operation, Shielded metal arc welding - Quality, Shielded metal arc welding - Safety, Shielded metal arc welding - Application, Shielded metal arc welding - Equipment, Shielded metal arc welding - Power supply, Shielded metal arc welding - Electrode, Shielded metal arc welding - Process variations, Shielded metal arc welding - Notes Read more here: » Shielded metal arc welding: Encyclopedia II - Shielded metal arc welding - Operation |
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| | | | | hygroscopic: Encyclopedia II - Shielded metal arc welding - Development After the discovery of the electric arc in 1800 by Humphry Davy, arc welding began to develop slowly, and by the end of the 19th century, an early welding process called carbon arc welding was developed. Nikolai N. Benardos and Stanislaus Olszewski were awarded patents in the 1880s showing a rudimentary electrode holder, and later, in 1890 C. L. Coffin received a U.S. patent for his arc welding method that utilized a metal electrode. The process, like SMAW, deposited melted electrode metal, serving as filler metal, ...
See also:Shielded metal arc welding, Shielded metal arc welding - Development, Shielded metal arc welding - Operation, Shielded metal arc welding - Quality, Shielded metal arc welding - Safety, Shielded metal arc welding - Application, Shielded metal arc welding - Equipment, Shielded metal arc welding - Power supply, Shielded metal arc welding - Electrode, Shielded metal arc welding - Process variations, Shielded metal arc welding - Notes Read more here: » Shielded metal arc welding: Encyclopedia II - Shielded metal arc welding - Development |
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| | | | | hygroscopic: Encyclopedia II - Lithium - Regulation Since lithium metal can act as a catalyst in amateur methamphetamine production, some jurisdictions limit the sale of lithium batteries, which are the most readily available source of lithium metal for ordinary consumers. However, the effectiveness of such restrictions in controlling illegal production of methamphetamine remains indeterminate and controversial.
Carriage and shipment of some kinds of lithium batteries may be prohibited aboard certain types of transportation (particularly aircraft), because of the ability of most types ...
See also:Lithium, Lithium - Basic features, Lithium - Applications, Lithium - History, Lithium - Occurrence, Lithium - Regulation, Lithium - Isotopes Read more here: » Lithium: Encyclopedia II - Lithium - Regulation |
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| | | | | hygroscopic: Encyclopedia II - Polyethylene terephthalate - Intrinsic viscosity One of the most important characteristics of PET is referred to as I.V.(Intrinsic Viscosity) The IV of the material, measured in dl/g (deci liters/gram) is dependent upon the length of its polymer chains. The longer the chains, the stiffer the material, and therefore the higher the IV. The average chain length of a particular batch of resin can be controlled during polymerization.
An IV of about:
0.60 - would be appropriate for fiber
0.65 - ...
See also:Polyethylene terephthalate, Polyethylene terephthalate - Uses, Polyethylene terephthalate - Intrinsic viscosity, Polyethylene terephthalate - Drying, Polyethylene terephthalate - Copolymers, Polyethylene terephthalate - Crystals, Polyethylene terephthalate - Degradation, Polyethylene terephthalate - Re-crystallization experiment, Polyethylene terephthalate - Processing Equipment Read more here: » Polyethylene terephthalate: Encyclopedia II - Polyethylene terephthalate - Intrinsic viscosity |
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| | | | | hygroscopic: Encyclopedia II - Polyethylene terephthalate - Drying PET is hygroscopic, meaning that it naturally absorbs water from its surroundings. However when this 'damp' PET is then heated a chemical reaction known as hydrolysis takes place between the water and the PET which reduces its molecular weight (IV) and its physical properties. This means that before the resin can be processed in a molding machine, as much moisture as possible must be removed from th ...
See also:Polyethylene terephthalate, Polyethylene terephthalate - Uses, Polyethylene terephthalate - Intrinsic viscosity, Polyethylene terephthalate - Drying, Polyethylene terephthalate - Copolymers, Polyethylene terephthalate - Crystals, Polyethylene terephthalate - Degradation, Polyethylene terephthalate - Re-crystallization experiment, Polyethylene terephthalate - Processing Equipment Read more here: » Polyethylene terephthalate: Encyclopedia II - Polyethylene terephthalate - Drying |
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| | | | | hygroscopic: Encyclopedia II - White phosphorus weapon - Arms control status Use of white phosphorus against military targets (outside civilian areas) is not specifically banned by any treaty. However, there is a debate on whether white phosphorus should be considered a chemical weapon and thus be outlawed by the Chemical Weapons Convention (CWC) which went into effect in April of 1997. The Convention is meant to prohibit weapons that are "dependent on the use of the toxic properties of chemicals as a method of warfare" (Article II, Definitions, 9, "Purposes not Prohibited" c.). The Convention defines a "toxic chemic ...
See also:White phosphorus weapon, White phosphorus weapon - Applications, White phosphorus weapon - Smoke-screening agent, White phosphorus weapon - Effects on humans, White phosphorus weapon - Effects of exposure to WP weapons, White phosphorus weapon - Exposure and inhalation of smoke, White phosphorus weapon - Oral ingestion, White phosphorus weapon - Arms control status, White phosphorus weapon - Military regulations, White phosphorus weapon - History, White phosphorus weapon - Disposal at sea, White phosphorus weapon - Use in Iraq, White phosphorus weapon - Notes Read more here: » White phosphorus weapon: Encyclopedia II - White phosphorus weapon - Arms control status |
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| | | | | hygroscopic: Encyclopedia II - Polyethylene terephthalate - Processing Equipment There are two basic molding methods, one-step and two-step. In two-step molding, two separate machines are used, one for injection molding the perform, the second for stretch-blow molding it into the final container shape. In one-step machines, the entire process from raw material to finished container is conducted within one machine, making it especially suitable for molding non-standard shapes (custom molding), including jars, flat oval, flask shapes etc. Its greatest merit is the reduction in space, product handling and energy, and far higher visual quality than can be achieved by the two-step system.
Sin ...
See also:Polyethylene terephthalate, Polyethylene terephthalate - Uses, Polyethylene terephthalate - Intrinsic viscosity, Polyethylene terephthalate - Drying, Polyethylene terephthalate - Copolymers, Polyethylene terephthalate - Crystals, Polyethylene terephthalate - Degradation, Polyethylene terephthalate - Re-crystallization experiment, Polyethylene terephthalate - Processing Equipment Read more here: » Polyethylene terephthalate: Encyclopedia II - Polyethylene terephthalate - Processing Equipment |
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| | | | | hygroscopic: Encyclopedia II - Polyethylene terephthalate - Copolymers In addition to pure (homopolymer) PET, PET modified by copolymerization is also available.
In some cases, the modified properties of copolymer are more desirable for a particular application. For example, cyclohexane dimethanol (CHDM) can be added to the polymer backbone in place of ethylene glycol. Since this building block is much larger (6 additional carbon atoms) than the ethylene glycol unit it replaces, it does not fit in with the neighboring chains the way an ethylene glycol unit would. This interferes with crys ...
See also:Polyethylene terephthalate, Polyethylene terephthalate - Uses, Polyethylene terephthalate - Intrinsic viscosity, Polyethylene terephthalate - Drying, Polyethylene terephthalate - Copolymers, Polyethylene terephthalate - Crystals, Polyethylene terephthalate - Degradation, Polyethylene terephthalate - Re-crystallization experiment, Polyethylene terephthalate - Processing Equipment Read more here: » Polyethylene terephthalate: Encyclopedia II - Polyethylene terephthalate - Copolymers |
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