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Silica accelerates tooth wear, and high levels of silica in plants frequently eaten by herbivores may have developed as a defense mechanism against predation. [24] [25] Silica is also the primary component of rice husk ash, which is used, for example, in filtration and as supplementary cementitious material (SCM) in cement and concrete ...
A silicate mineral is generally an inorganic compound consisting of subunits with the formula [SiO 2+n] 2n−. Although depicted as such, the description of silicates as anions is a simplification. Balancing the charges of the silicate anions are metal cations, M x+. Typical cations are Mg 2+, Fe 2+, and Na +.
Potassium silicate is the name for a family of inorganic compounds. The most common potassium silicate has the formula K 2 SiO 3, samples of which contain varying amounts of water. These are white solids or colorless solutions. [1]
The tables below include tabular lists for selected basic foods, compiled from United States Dept. of Agriculture (USDA) sources. Included for each food is its weight in grams, its calories, and (also in grams,) the amount of protein, carbohydrates, dietary fiber, fat, and saturated fat. [1] As foods vary by brands and stores, the figures ...
Orthosilicic acid (/ ˌɔːrθəsɪˈlɪsɪk /) is an inorganic compound with the formula Si (O H)4. Although rarely observed, it is the key compound of silica and silicates and the precursor to other silicic acids [H2xSiOx+2]n. Silicic acids play important roles in biomineralization and technology. [2][3][4] It is the parent acid of the ...
Silica gel is an amorphous and porous form of silicon dioxide (silica), consisting of an irregular tridimensional framework of alternating silicon and oxygen atoms with nanometer -scale voids and pores. The voids may contain water or some other liquids, or may be filled by gas or vacuum. In the last case, the material is properly called silica ...
These products are often called precipitated silica or silica sols. Hydrogen ions from the surface of colloidal silica tend to dissociate in aqueous solution, yielding a high negative charge. Substitution of some of the Si atoms by Al is known increase the negative colloidal charge, especially when it is evaluated at pH below the neutral point.
Vitamin A (e.g. retinol (see also - provitamin A carotenoids)) Vitamin C (Ascorbic acid) Vitamin D. Ergocalciferol. Cholecalciferol. Vitamin E (tocopherols and tocotrienols) Vitamin K. Vitamin K 1 (phylloquinone)
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