Category: I
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International classification of diseases (ICD)
The official list of disease categories issued by the World Health Organization; subscribed to by all member nations, who may assign their own terms to each ICD category. ICDA (International Classification of Diseases, adapted for use in the United States and prepared by the U.S. Public Health Service) represents the official list of diagnostic terms…
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Indolamine
One of a group of biogenic amines, e.g., serotonin, that contains an indole ring and amine group within its chemical structure.
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Impulse disorders
A varied group of nonpsychotic disorders in which impulse control is weak. The impulsive behavior is usually pleasurable, irresistible, and ego-syn- tonic. Impulse disorders listed in DSM-III-R include pathological gambling, kleptomania, pyromania, intermittent explosive disorder, and trichotillomania.
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ID
In Freudian theory, the part of the personality that is the unconscious source of unstructured desires and drives.
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Isoelectric point
Each protein has a point at which it can become either an acid or alkaline, that is, the neutral or isoelectric point. At this point, the protein is least soluble and will precipitate out of solution. The pH level at which protein shows no net charge. The pH of a protein in solution at which…
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Ion exchange
A reversible chemical reaction between a solid and a liquid by means of which ions may be interchanged between the two. It is in common use in water softening and water deionizing.
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Iodophors
A combination of iodine with a wetting agent which slowly releases free iodine in the water. A combination of iodine and a solubilizing agent or carrier that liberates free iodine in solution. Some forms are used as general antiseptics; they are less irritating than elemental forms of iodine.
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Iodized salt
Table salt to which .01% sodium or potassium iodide has been added. A salt containing 1 part sodium or potassium iodide to 10,000 parts of sodium chloride. It is an important source of iodine in the diet. Its use prevents goiter due to iodine deficiency. Salt infused with a negligible amount of iodine, frequently suggested…
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Iodine value
A measure of the degree of unsaturation of a fat or oil, it refers to the number of grams of iodine absorbed by 100 gm of fat.
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Iodine
An optional declaration on a nutrition label unless added as a nutrient supplement. It is a mineral and serves as a part of thyroid hormone. Iodine helps regulate how fast the body uses energy. A chemical element which is essential to the body, especially to the functioning of the thyroid gland. Iodine is a micromineral…