Silicate fiber

Chemical modifications by derivitizing the surfaces of mineral fiber silicates have revealed alterations in reactivity in in vitro cell toxicity studies, suggesting a multifactorial character of particle/cell interactions [171]. In addition, the adsorption of bovine serum albumin onto asbestos fibers has been shown by infrared spectroscopy and NMR to be mediated by O—H—N hydrogen bonds [172]. In view of the various hypotheses put forward in the bulk biochemical studies and the apparent surface-oriented origins of these reactions, it is important to examine the features of the silicate/cell interfaces and surfaces. Herein we present a typical case of the interaction between a related alumino-silicate (i.e., cummingtonite) and bioorganic cell interaction. 

Synonyms Aluminosilicate Aluminum oxide silicate Aluminum silicon powd. uncoated Ceramic fiber Silicic acid aluminum salt... 

Container Insulation Tanks containing materials above atmospheric temperature may require insulation to reduce loss of heat. Almost any of the commonly used insulating materials can be employed. Calcium silicate, glass fiber, mineral wool, cellular glass, and plastic foams are among those used. Tanks exposed to weather must have jackets or protective coatings, usually asphalt, to keep water out of the insulation. 

Filter aids should have low bulk density to minimize settling and aid good distribution on a filter-medium surface that may not be horizontal. They should also be porous and capable of forming a porous cake to minimize flow resistance, and they must be chemically inert to the filtrate. These characteristics are all found in the two most popular commercial filter aids diatomaceous silica (also called diatomite, or diatomaceous earth), which is an almost pure silica prepared from deposits of diatom skeletons and expanded perhte, particles of puffed lava that are principally aluminum alkali siheate. Cellulosic fibers (ground wood pulp) are sometimes used when siliceous materials cannot be used but are much more compressible. The use of other less effective aids (e.g., carbon and gypsum) may be justified in special cases. Sometimes a combination or carbon and diatomaceous silica permits adsorption in addition to filter-aid performance. Various other materials, such as salt, fine sand, starch, and precipitated calcium carbonate, are employed in specific industries where they represent either waste material or inexpensive alternatives to conventional filter aids. 

Some commonly used insulating materials are calcium silicate, mineral slagwool, glass fiber, cellular glass, and polyurethane. 

Fibers in this category are composed of naturally occurring materials. A good example is asbestos. The most common type is chrysotile, representing more than 95% of world asbestos production. Chemically it is magnesium silicate (Mg6(OH)4 Si205). Today, use of this fiber is limited because long exposure to it may cause bronchial cancer. 

Glass fiber board consisting of a boro-silicate glass shows a thermal conductivity under pressure which is dependent on the temperature (Table 17). There is a natural concern about the safety of any fiber mate-... 

Asbestos It is not the name of a distinct mineral species but is a commercial term applied to fibrous varieties of several silicate minerals such as amosite and crocido-lite. These extremely fine fibers are useful as fillers and/or reinforcements in plastics. Property performances include withstanding wear and high temperatures, chemical resistance, and strengths with high modulus of elasticity. When not properly handled or used, like other fibrous materials, they can be hazardous. 

Mineral Asbestos Fibers Fibrous mineral silicates... 

The water-to-silicate molar ratio (R) is an another important technological parameter determining the final form of produced material. For example, fibers can be formed from hydrolysates with R l, for monodisperse spheres R 50 while bulk samples can be obtained from hydrolysates with R ranging broadly from 5 to 15. The hydrolysis process is also strongly influenced by such factors as temperature, time and character of the catalyst used. 

Lin, A. Kim, B. H. Ju, S. Han, W.-T. 2007. Fabrication and third-order non linearity of germano-silicate glass fiber incorporated with Au nanoparticles. Proc. SPIE-Int. Soc. Opt. Eng. 6481 64810M/64811-64810M/64817. 

Amperometric cells, sensors using, 22 271 Amperometric measurements, 14 612 Amphetamine, 3 89-90 Amphibole asbestos, 1 803 3 288 crystal structure, 3 297-298 exposure limits, 3 316 fiber morphology, 3 294-295 silicate backbone, 3 296 Amphibole potassium fluorrichterite, glass- ceramics based on, 12 637 Amphiphile-oil-water-electrolyte phase diagram, 16 427-428 Amphiphile-oil-water phase diagrams,... 

Siliceous fibers, silylation of, 22 703 Siliceous minerals, 22 365-366 structure of, 22 366 Siliceous zeolites, 16 818 SILIC F-Silicalite... 

Veblen, D. R. (1980). Anthophyllite asbestos microstructures, intergrown sheet silicates and mechanism of fiber formation. Amer. Min. 65 1075-1086. 

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