Opalescent solutions

For ethyl alcohol, two volumes of dicycZohexyl are mixed with one volume of the alcohol, a thermometer is introduced, and the mixture heated until it becomes clear. The solution is then slowly cooled, with constant stirring, and the temperature is determined at which the opalescent solution suddenly becomes turbid so that the immersed portion of the mercury thread of the thermometer is no longer clearly visible. This is the C.S.T. The water content may then be evaluated by reference to the following table. 

Commercial pectin is a fine, yellowish white, almost odorless powder with a mucilaginous taste. It is completely soluble in twenty parts of water giving an acidic, viscous, and opalescent solution. 

Yellow clear or slightly opalescent solutions of low viscosity. 

PLASMA. The portion of the blood remaining after removal of the white and red cells and the platelets it differs from serum in that it contains fibrinogen, which induces clotting by conversion into fibrin by activity of the enzyme thrombin. Plasma is made up of more than 40 proteins and also contains acids, lipids, and metal ions. It is an amber, opalescent solution in which the proteins are in colloidal suspension and the solutes (electrolytes and nonelectrolytes) are either emulsified or in true solution. The proteins can be separated from each other and from the other solutes by nltrafiltration, nltracentrifugation, electrophoresis, and immuno-chemical techniques. See also Blood. 

Starch—insoluble in cold, opalescent solution on boiling. 

The appearance of different kinds of starch under the microscope is characteristic. Starch is insoluble in cold water, but when heated the granules swell up and burst their contents (granulose) dissolve and the cell walls remain in suspension, giving an opalescent solution. 

For polymer concentrations < 3 % the mixtures remain isotropic during polymerisation and become a rubbery mass that is too viscous to stir in the later stages of heating. In contrast polymer concentrations of 5-10% form yellow green stir-opalescent solutions within 30 minutes of the dissolution of the terephthalic acid. Such solutions remain stirrable throughout the polymerisation despite the higher concentrations — an indication of the liquid-crystalline nature of the medium. 

Work at the outset focused on physical and chemical characterization of the whole lipopolysaccharide antigens of each of the seven Fisher lmmunotypes. All give opalescent solutions in water and have very high apparent molecular weights. 

Furcelleran occurs as a brown or tan to white, coarse to fine powder. It is soluble in water at a temperature of about 80°, forming a viscous, clear or slightly opalescent solution that flows readily. It disperses in water more readily if first moistened with alcohol, glycerin, or a saturated solution of sucrose in water. 

Sodium Lauryl Sulfate occurs as small, white or light yellow crystals. It is a mixture of sodium alkylsulfates consisting chiefly of Sodium Lauryl Sulfate [CH3(CH2)ioCH2OS03Na]. One gram dissolves in 10 mL of water, forming an opalescent solution. 

Solubility freely soluble in water, giving an opalescent solution practically insoluble in chloroform and ether. 

Solubility One part oil in three parts ethanol (70%) (occasionally opalescent solutions). 

Properties Small, white or light-yellow crystals slight characteristic odor. Soluble in water, forming an opalescent solution. 

The kit contains the lyophilized, sterile ingredients in a multidose vial. Labeling with 99mrpc-pertechnetate is carried out under aseptic conditions by adding a suitable volume of sterile Tc eluate, up to 3.7 GBq (100 mCi) to the reaction vial. The reaction is allowed to proceed at room temperature for 20 min. Tc-tin colloid is a sterile, pyrogen-free, opalescent solution suitable for intravenous injection. The pH is 4.0-6.0 on pH paper. 

Pure glycogen is a snow-white, flour/ powder amorphous, tasteless, and odorless soluble in H.,0, insoluble in alcohol and ether. In H O it swells up at first, and forms an opalescent solution, which becomes clear on the addition of potash. Its solutions are dextrogyrous to about three times the extent of those of glucose. 

For filtration of opalescent solutions containing colloidal impurities, the conical part of the filtration capillary is made longer (20-30 mm) and there are introduced into it, first, a well tamped cotton wool plug, then iron-free charcoal for polar solvents or alumina (chromatographic quality) for apolar solvents, and finally a second cotton wool plug. Since this filter is only slowly permeable, it is wetted only with the solvent, and the solvent necessary for the suction process is introduced from the other capillary after evaporation of the solvent through this free capillary end the latter is at once sealed. 

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