Benders'dictionary of nutrition and food technology

384bottle. White port is made from white grapes; generally servedchilled as an apéritif.porter See beer.positron emission tomography scanning Radiographic techniquethat utilises positrons emitted by the decay of 15 O after a dose of15H 2 O.Poskitt index Index of fatness in children; per cent of expectedweight for age.posset (1) Drink made from hot milk curdled with ale or wine,sometimes thickened with breadcrumbs and spiced. Formerlyused as remedy for colds; popular in late Middle Ages.(2) Small amount of milk regurgitated by babies after feeding.post-cibal Occurring after eating.post-mature Baby born after 42 weeks of gestation.See also premature.post-partum Relating to the first few days after birth.postprandial After a meal.potassium An essential mineral, widespread in nature; the humanbody contains about 125 g. Mostly present inside the cells. Referenceintake for adults 3.5 g/day; abundant in fruit and vegetables.Important in plant fertilisers.potassium nitrate See nitrate.potassium sorbate Potassium salt of sorbic acid (E-202).potato Or Irish potato; the ‘ordinary’ potato, tuber of Solanumtuberosum.Composition/100 g: water 79 g, 322 kJ (77 kcal), protein 2 g, fat0.1g, carbohydrate 17.5g (0.8g sugars), fibre 2.2g, ash 1.1g, Ca12 mg, Fe 0.8 mg, Mg 23 mg, P 57 mg, K 421 mg, Na 6 mg, Zn0.3mg, Cu 0.1mg, Mn 0.2mg, Se 0.3µg, 9 µg carotenoids, K1.9 mg, B 1 0.08 mg, B 2 0.03 mg, niacin 1.1 mg, B 6 0.29 mg, folate16µg, pantothenate 0.3 mg, C 20 mg. A 180 g serving is a sourceof Cu, Mg, Mn, P, niacin, folate, a good source of vitamin B 6 ,arich source of vitamin C.potato, air Tubers of Dioscorea bulbifera, the aerial yam.potato crisps Flavoured thin slices of potato, deep fried and eatencold, sometimes as an accompaniment to meals, more commonlyas a snack. Called chips in USA.potato, fairy See earth nut.potato flour Dried potato tuber.potato starch Or farina, prepared from potato tuber and widelyused as a stabilising agent when gelatinised by heat.potato, sweet Tubers of the herbaceous climbing plant Ipomoeabatatas, known in Britain before the Irish potato.The flesh maybe white, yellow or pink (if carotene is present); the leaves arealso edible.