Several hydrated forms of the oxide are known, and a colloidal variety may be obtained by the dialysis of a strong hydrochloric acid solution of sodium molybdate.
A colloidal form has been obtained by A.
Allotropic Modifications.-Sulphur assumes crystalline, amorphous and (possibly) colloidal forms. Historically the most important are the rhombic (Sa) and monoclinic (So) forms, discussed by E.
The colloidal sulphur, Ss, described by Debus as a product of the interaction of sulphuretted hydrogen and sulphur dioxide in aqueous solution, is regarded by Spring (Rec. tra y.
The reactions taking place are complicated, and the solution contains ultimately small drops of sulphur in suspension, a colloidal sulphur (which Spring (Rec. tra y.
Knapp in 1848, and a colloidal modification was described by H.
Schneider and others, have proved the existence of " colloidal silver "; similar forms of the metals gold, copper, and of the platinum metals have been described.
The silica, in the form of diatom or radiolarian skeletons, is eventually deposited on the ocean floor after the death of the organisms. Most of the fine colloidal clay is, however, deposited as river-sludges when the fresh water carrying it mixes with denser sea-water.
The colloidal particles are electrically charged and become discharged by the ions of sodium, magnesium and calcium present in the sea-water.
Albumins proper: characterized by having colloidal solutions.
A colloidal or soluble stannic acid is obtained by dialysing a mixture of tin tetrachloride and alkali, or of sodium stannate and hydrochloric acid.
On heating it is converted into colloidal metastannic acid.
A hydrated tin trioxide, Sn03, was obtained by Spring by adding barium dioxide to a solution of stannous chloride and hydrochloric acid; the solution is dialysed, and the colloidal solution is evaporated to form a white mass of 2Sn03 H20.
When freshly prepared it dissolves in cold water to form an indigocoloured solution with a brownish fluorescence of colloidal aurous oxide; it is insoluble in hot water.
Still, according to Murray and Irvine, finely divided colloidal clay is to be found in all parts of the ocean however remote from land, though in very small amount, and there is less in tropical than in cooler waters.
A colloidal variety was obtained by A.
Besides a large number of animal and vegetable substances, many precipitates formed in the course of inorganic chemical reactions are non-crystalline and appear in the colloidal state, instances are the sulphides of antimony and arsenic and the hydroxides of iron and alumina.
The size of the suspended particles in colloidal solutions varies greatly.
Graham obtained a colloidal tungstic acid by dialysing a dilute solution of sodium tungstate and its equivalent of hydrochloric acid; on concentrating in a vacuum a gummy product is obtained, which still remains soluble after heating to 200°, but it is converted into the trioxide on heating to redness.
Many colloidal solutions of copper have been obtained.
Still another view, advocated by Bordet, is that the union of toxin and antitoxin is rather of physical than of strictly chemical nature, and represents an interaction of colloidal substances, a sort of molecular deposition by which the smaller toxin molecule becomes entangled in the larger molecule of antitoxin.
Colloidal silver is the name given by Carey Lea to the precipitates obtained by adding reducing solutions, such as ferrous sulphate, tartrates, citrates, tannin, &c., or to silver solutions.
They dissolve in water to form solutions, which do not penetrate parchment membranes, hence the name colloidal.
A colloidal selenium was obtained by C. Paal and C. Koch (Ber., 1905, 38, p. 526) by reducing selenious acid dissolved in an aqueous solution of sodium protalbate with hydrazine hydrate and hydrochloric acid, the precipitate obtained being then dissolved in sodium carbonate.
Microscopic sections show that flint is very finely crystalline and consists of quartz or chalcedonic silica; colloidal or amorphous silica may also be present but cannot form any considerable part of the rock.
It has been suggested that this change is due to the removal of the colloidal silica in solution, leaving behind the fibres and grains of more crystalline structure.
Very finely divided sub-microscopic particles in liquids or in transparent solids can be examined; and the method has proved exceptionally valuable in the investigation of colloidal solutions.
A little clay, stirred up with water in a glass vessel, takes hours to settle, and even after two or three days some remains in suspension; in fact, it has been suggested that in such cases the clay forms a sort of "colloidal solution" in the water.
anhydrous colloidal silica, maize starch, povidone, microcrystalline cellulose and magnesium stearate.
Therefore the true concentration of the colloidal calcium carbonate is likely to have been 89 or 101 ppm as CaCO3.
coalesceon of coalescing agent to the emulsion, containing ammonium lauryl sulfate, generated a secondary colloidal population of lower electrophoretic mobility.
colloidal silica structural units filled with solvents.
colloidal dispersions in simple fluids.
colloidal silver is a valuable first aid treatment for sore or infected eyes.
colloidal minerals in the honor of being the biggest fraud in the natural health industry.
Further research interests are in the rheology of colloidal ceramic dispersions.
SOVEREIGN SILVER is a colloidal silver hydrosol developed using state of the art technology to ensure the quality of this naturally powerful immune defense.
You may want to soak in a tub of water to which cornstarch or colloidal oatmeal has been added.
Aerogel is made by high temperature and pressure critical point drying of a gel composed of colloidal silica structural units filled with solvents.
The tablets also contain the following ingredients: anhydrous colloidal silica, maize starch, povidone, microcrystalline cellulose and magnesium stearate.
The smaller the particles the better the quality of the colloidal silver.
Sol-gel processes are used in industry for the large-scale preparation of silica gels and colloidal sol-gel processes are used in industry for the large-scale preparation of silica gels and colloidal sols.
Our original article presented computer simulation results for the viscoelastic response of a simple model colloidal suspension.
Silica (which is required for the skeletons of diatoms, radiolaria, peridinians, etc.) is present in about the same concentration, but it is now suspected that a source of this substance may be clay washed down from the land and present in the sea in the colloidal form.
The coarser particles of the sediments are deposited near the shore as gravels, sand and muds, but the very fine particles remain in suspension in the colloidal form, and some of this may be acted upon by marine bacteria or (it is surmised) even utilized by diatoms as a source of silica.
A dilute solution of iodine prevents the decomposition of hydrogen peroxide by colloidal platinum (G.
Graham obtained a colloidal tungstic acid by dialysing a dilute solution of sodium tungstate and its equivalent of hydrochloric acid; on concentrating in a vacuum a gummy product is obtained, which still remains soluble after heating to 200Ã‚°, but it is converted into the trioxide on heating to redness.
The smaller the particles the better the quality of the Colloidal Silver.
Sol-gel processes are used in industry for the large-scale preparation of silica gels and colloidal sols.
Similar applications using tea tree oil, colloidal silver or oregano oil may also be used.
Colloidal oatmeal (oatmeal that has been ground into a fine powder, e.g.
Aveeno was a mere science experiment back in 1945 when Albert and Sidney Musher got creative and mixed 100 percent colloidal oatmeal with other century old remedies to create the infamous Aveeno skin care Soothing Bath Treatment.
Aveeno's Soothing Bath Treatment is a natural and relaxing power bath formula created to soothe itchy and dry skin with a mixture of 100% natural colloidal oatmeal and other natural ingredients.
If you're prone to irritation, apply a soothing moisturizer loaded with colloidal oatmeal, such as Aveeno Advanced Care Moisturizing Cream.
Oatmeal bath: Colloidal oatmeal baths are another option for providing temporary sunburn relief.
Create a special bath for your skin by adding colloidal oatmeal, chamomile tea bags, and a little baking soda for the pain, then apply alcohol-free and fragrance-free lotion once you've gotten out and patted the skin dry.
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