Benders'dictionary of nutrition and food technology

237blood spots) appear on the skin below the area of application invitamin C deficient subjects.heterofermentative Of micro-organisms, producing more thanone main metabolic product. See also homofermentative.heterophysiasis Intestinal infestation with the parasitic flukeHeterophyes heterophyes after consumption of raw fish containingthe larval stage.heteropolysaccharide polysaccharide containing more than onetype of monosaccharide.heterosides See holosides.heterotrophes See autotrophes.hexamethylene tetramine Preservative (fungicide), E-239. Alsoknown as hexamine.hexamic acid Cyclohexyl sulphamic acid, the free acid ofcyclamate.hexamine See hexamethylene tetramine.hexokinase The enzyme (EC 2.7.1.1) that catalyses the phosphorylationof glucose to glucose 6-phosphate. See alsoglucokinase.hexosans polysaccharides of hexose sugars, including starch,glycogen, cellulose and hemicellulose.hexose monophosphate shunt The pentose phosphate pathway ofglucose metabolism.hexoses Six-carbon monosaccharide sugars such as glucose orfructose.hexuronic acid The acid derived from a hexose sugar by oxidationof the hydroxyl group on carbon-6. Originally proposed asa name for ascorbic acid. The hexuronic acid derived fromglucose is glucuronic acid.HFAs Hydrofluoroalkanes, see refrigerants.HFCs Hydrofluorocarbons, see refrigerants.HFCS High-fructose corn syrup, see syrup, fructose.HF heating High-frequency heating, see microwave cooking.HFN See hagberg falling number.HGH Human growth hormone (somatotrophin).HHP High hydrostatic pressure, a technology proposed forpreservation of foods by inactivation of enzymes withoutheating; requires pressures of the order of 8–900 MPa.hiatus hernia Protrusion of a part of the stomach upwardsthrough the diaphragm. The condition occurs in about 40% ofthe population, most people suffering no ill effects; in a smallnumber of people there is reflux of stomach contents into theoesophagus, causing heartburn.See also gastrointestinal tract.hickory nut North American walnut, Carya spp.