Authors : Samia M. Abdel Rahaman , Isam A. Mohamed Ahmed , Elfadil E. Babiker and Salah A. Mahgoub
Abstract: The composition, structure of proteins and some physicochemical properties of meals prepared from three sunflower cultivars (G100, 6431 and PAC2594) were studied. The cultivars meals were very rich in protein, ash, fiber and carbohydrates. The protein of the cultivars had five fractions when detected by SDS-PAGE electrophoresis. However, PAC 2594 cultivars had more two additional fractions. The meals protein had maximum fluorescence emission spectra at 336, 334 and 334 nm for the cultivars G100, 6431 and PAC 2594, respectively. G100 cultivar had ? maxima at 292 and 326nm and that of 6431 were 294 and 328nm while for PAC2594 were 296 and 330 nm. The meals were least soluble at pH 4 (isoelectric region) and on either side of this pH, the solubility started to increase especially towards the alkaline region. The foaming capacity was lower at pH 4 and increased gradually on either side of this pH. However, addition of salt had no adverse effect on the foaming capacity of the meals protein. The foam of the protein was stable at the alkaline region. The meal of the cultivars had water absorption capacity of 211.0 gm/100gm, water retention ranged from 731.9 to 733.3 gm/100gm, fat absorption capacity ranged from 274.9 to 300 gm/100gm and bulk density ranged from 0.35 to 0.44 gm mL 1.
Samia M. Abdel Rahaman , Isam A. Mohamed Ahmed , Elfadil E. Babiker and Salah A. Mahgoub , 2006. Composition, Total Protein Structure and Physicochemical Properties of Meals Prepared from Sunflower (Helianthus annuus L.) Cultivars . Journal of Food Technology, 4: 22-28.