Amide groups of urea are replaced by hydrazine residues. Starch is joined to a dye to determine the chemical analysis of the substance being studied. Technique of applying an electrical charge to primary plasma proteins and observing their migration on paper. Patterns made by the movement of charged particles suspended in a liquid under the influence of an applied electric field. Visual examination of any cavity of the body with special scope.
Enzymes hasten the completion of technique being used.
Assays using catalyzing properties of enzymes to detect immunologic reactions. Radio-immunoassay using observations made after adding an enzyme to radioactive material being measured. Non-specific colorimetric test used to detect a variety of substances in urine. Addition of acidic solution of ferric chloride to specimen results in formation of colored products with a number of metabolites. Formation of downy masses of precipitate in a precipitin test or formation of agglutinated bacteria in an agglutination test for the H antigens of salmonella species.