Effect of roasting on tocopherols of gourd seeds (Cucurbita pepo)

• Main Authors: Gemrot François, Barouh Nathalie, Vieu Jean-Pierre, Pioch Daniel, Montet Didier
• Format: Article
• Language: English
• Published: Consejo Superior de Investigaciones Científicas 2006-12-01
• Series: Grasas y Aceites
• Subjects: cucurbita pepo; gourd; roasting; tocopherol; vitamin e
• Online Access: http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/67

The effect of roasting at high temperatures on the Vitamin E in hulled gourd seeds of Cucurbita pepo was studied. Roasting at 140°C for 5 min induced a swelling of the seed with an increase in volume of 43 %, and a weight loss of 6.5 %.The seed acquired the desired puffed-up appearance. The water activity of raw seeds was 0.544 and decreased during roasting to 0.105. Cucurbita pepo seeds contained 51.0 % fat. Tocopherol content of roasted seeds was 68mg/100g oil and of non roasted seeds was 107mg/100g oil. γ-tocopherol represented 96% of the total tocopherols. Total tocopherol loss during roasting was 36%. β-tocopherol loss was the highest at 50%; for α-tocopherol it was 41% and for γ-tocopherol it was 36%.