PHYSICOCHEMICAL AND SENSORY CHARACTERISTICS OF PEANUT PASTE AS AFFECTED BY PROCESSING CONDITIONS

The effects of temperature and number of water extractions on lipoxyge nase, color, instrumental textural properties, hexanal in headspace vo latiles, and sensory characteristics of peanut paste were determined. Water extraction at 60, 75, and 90C for 10 min resulted in 50, 95, and 100% reduction in lipoxygenase activity, respectively. Processing con ditions significantly affected color lightness, hardness, cohesiveness , adhesiveness, hexanal, raw peanut flavor, and spreadability (P < 0.0 5). Water extraction at 90C for 10 min at least three times produced a more spreadable paste with less volatile hexanal and raw beany flavor than pastes subjected to the different treatments studied.