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Iodometry. Iodometry, known as iodometric titration, is a method of volumetric chemical analysis, a redox titration where the appearance or disappearance of elementary iodine indicates the end point. Note that iodometry involves indirect titration of iodine liberated by reaction with the analyte, whereas iodimetry involves direct titration ...
Vitamin C is an essential nutrient involved in the repair of tissue, the formation of collagen, and the enzymatic production of certain neurotransmitters. It is required for the functioning of several enzymes and is important for immune system function. [6] It also functions as an antioxidant.
Dehydroascorbic acid (DHA) is an oxidized form of ascorbic acid (vitamin C). It is actively imported into the endoplasmic reticulum of cells via glucose transporters. [1] It is trapped therein by reduction back to ascorbic acid by glutathione and other thiols. [2] The (free) chemical radical semidehydroascorbic acid (SDA) also belongs to the ...
Titration. A burette and Erlenmeyer flask (conical flask) being used for an acid–base titration. Titration (also known as titrimetry[1] and volumetric analysis) is a common laboratory method of quantitative chemical analysis to determine the concentration of an identified analyte (a substance to be analyzed).
Ascorbic acid exists as two enantiomers (mirror-image isomers), commonly denoted " l " (for "levo") and " d " (for "dextro"). The l isomer is the one most often encountered: it occurs naturally in many foods, and is one form (" vitamer ") of vitamin C, an essential nutrient for humans and many animals. Deficiency of vitamin C causes scurvy, formerly a major disease of sailors in long sea ...
Micronutrient. Micronutrients are essential dietary elements required by organisms in varying quantities to regulate physiological functions of cells and organs. [1][2] Micronutrients support the health of organisms throughout life. [3][4][5] In varying amounts supplied through the diet, micronutrients include such compounds as vitamins and ...
Cofactor (biochemistry) The succinate dehydrogenase complex showing several cofactors, including flavin, iron–sulfur centers, and heme. A cofactor is a non- protein chemical compound or metallic ion that is required for an enzyme 's role as a catalyst (a catalyst is a substance that increases the rate of a chemical reaction).
International unit. In pharmacology, the international unit (IU) is a unit of measurement for the effect or biological activity of a substance, for the purpose of easier comparison across similar forms of substances. International units are used to quantify vitamins and biologics (hormones, some medications, vaccines, blood products and similar ...