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Pigments
Pigments Pigments and dyes are called colorants. The ways in which colorants are used determines whether they are pigments or dyes. Pigments are water-and oil-insoluble natural and synthetic products that impart color to materials such as paper and plastics. Dyes, by contrast, are water-soluble... Read more |
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casein
casein , well-defined group of proteins found in milk, constituting about 80% of the proteins in cow's milk, but only 40% in human milk. Casein is a remarkably efficient nutrient, supplying not only essential amino acids, but also some carbohydrates and the inorganic elements calcium and phosphorus.... Read more |
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quinine
quinine , white crystalline alkaloid with a bitter taste. Before the development of more effective synthetic drugs such as quinacrine, chloroquine, and primaquine, quinine was the specific agent in the treatment of malaria . Almost insoluble in water, it dissolves readily in alcohol and other... Read more |
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cholesterol
cholesterol , fatty lipid found in the body tissues and blood plasma of vertebrates; it is only sparingly soluble in water, but much more soluble in some organic solvents. A steroid , cholesterol can be found in large concentrations in the brain, spinal cord, and liver. The liver is the most... Read more |
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detergent
detergent , substance that aids in the removal of dirt. Detergents act mainly on the oily films that trap dirt particles. The detergent molecules have a hydrocarbon portion, soluble in oil, and an ionic portion, soluble in water. The detergent acts as an emulsifier, i.e., by bridging the water and... Read more |
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camphor
camphor , C 10 H 16 O, white, crystalline solid ketone with a characteristic pungent odor and taste. It melts at 176°C and boils at 204°C. The natural variety, Japan camphor, is obtained by steam distillation of the wood of the camphor tree ( Cinnamomum camphora ) native to China, Japan,... Read more |
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barium meal
barium meal Some compounds of barium are poisonous, but barium sulphate is a harmless, white, insoluble substance that can be made into a tasteless suspension which is ‘radio-opaque’. This can be swallowed as a ‘barium meal’ to aid diagnosis of disorders of the upper... Read more |
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Fibrinolysis
fibrinolysis (fib-ri-nol-i-sis) n. the process by which blood clots are removed from the circulation, involving digestion of the insoluble protein fibrin by the enzyme plasmin.... Read more |
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sulfate
sulfate chemical compound containing the sulfate (SO 4 ) radical . Sulfates are salts or esters of sulfuric acid , H 2 SO 4 , formed by replacing one or both of the hydrogens with a metal (e.g., sodium) or a radical (e.g., ammonium or ethyl). Sulfates in which both hydrogens are replaced are... Read more |
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hydrogen sulfide
hydrogen sulfide chemical compound, H 2 S, a colorless, extremely poisonous gas that has a very disagreeable odor, much like that of rotten eggs. It is slightly soluble in water and is soluble in carbon disulfide. Dissolved in water, it forms a very weak dibasic acid that is sometimes called... Read more |
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Development of PVA Copolyme Capsules
...bioavailability of some insoluble drugs is...conventional hard capsules cannot tolerate...investigates a PVA copolymer, which has...material in capsule formulations. Hard capsules have been...alcohol (PVA) acrylic...that the bioavailability of some ... |