. Biochemistry of plants and animals, an introduction. Biochemistry. O O H citronetin eomponcnt of oak bark and yellow coloring agent in corn plants, is illustrated as an example of the flavonol class. The flavonols have OH HO—. i—OH quercitin been reported to possess vitamin activity in the animal. Extracts of citrus peel and other sources of flavonols appear to supplement vita- min C in the prevention of capillary fragility. Rutin, a diglycoside of quercitrin, contains galactosylglucose and rhamnose and is isolated from buckwheat for medical purposes. The inheritance of the anthocyanins has
. Biochemistry of plants and animals, an introduction. Biochemistry. O O H citronetin eomponcnt of oak bark and yellow coloring agent in corn plants, is illustrated as an example of the flavonol class. The flavonols have OH HO—. i—OH quercitin been reported to possess vitamin activity in the animal. Extracts of citrus peel and other sources of flavonols appear to supplement vita- min C in the prevention of capillary fragility. Rutin, a diglycoside of quercitrin, contains galactosylglucose and rhamnose and is isolated from buckwheat for medical purposes. The inheritance of the anthocyanins has been studied in a number of higher plants. Particular genes are known to cause the replacement of pelargonidin anthocyanins by the corresponding cyanidins. The change requires the addition of a hydroxyl group in the 3' position of the basic nucleus. No biological function, other than possible at- traction of insects for pollination purposes, has been ascribed to the water-soluble plant pigments. Essential Oils Essential oils have been so named because of their odor or essence. The fraction may be recovered from plant material by extraction with the usual fat solvents or by steam distillation. If the former method is used, distillation is necessary to separate the terpene derivatives from the phospholipides, carotenoids, and other components of the lipide fraction. Essential oils are members of a large group of compounds •vvhich may be considered as derivatives of isoprene, a 5 carbon Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Mallette, M. Frank (Manney Frank), 1917-. New York, Wiley
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