الفهرس 
Chemical and biological studies of some food processing wastes as a source of dietary fibre and antioxidants in
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Abstract
Agricultural by-products originated from food processing factories represented one of the permanent environmental problems. New trends were raised to utilize these valuable wastes full of nutraceuticals and phytochemicals. Pomegranate and orange peels were used in the current study to assess their beneficial effects. The counts of microorganism were determined and found in the safe permitted level in food. Afterward peels were directed to prepare bakery products. Pomegranate peel contained iron, zinc, calcium, potassium, magnesium, phosphorus and sodium at levels of 12.75, 5.9, 202.7, 135.8, 45.46, 66.38 and 38.91 mg/100g dry matter, respectively. Orange peel valued 19.5, 6.7, 635.8, 785.9, 91.4, 57.55 and 32.34 mg/100g dry matter, respectively. Pomegranate peel contained vitamins B1 and D3 at levels of 0.014 g/Kg and 0.023og/Kg respectively. While, in orange peel were 0.027 g/kg and 0.019 og/Kg, respectively. Pomegranate peel had total, soluble and insoluble dietary fiber contents of 19.9%, 5.8% and 13.9%, respectively. Whereas, orange peel registered 33.8%, 6.5% and 27.4%, respectively. GC/MS analysis of orange peel showed the existence of Dihydrocarvone (30.25%) and 4’,6-Dimethoxyisoflavone-7-O-Ý-D-glucopyranoside (20.83%). Phloroglucinol (28.52%), (S)-(-)-Citronellic acid (14.24%) were the bioactive compounds.Biological experiment was conducted for two months using male albino rats to assess the ameliorative effect of peels at concentrations 10%, 20% and 30% in lowering cholesterol level in rats fed high fat diet, addition of 10, 20 and 30% PPP or OPP to high fat diet maintained kidney function in a safe level as negative control. No histopathological changes in liver from rates fed on OPP at level 30%. It could be suggested that dietary supplementation of PPP or OPP might have greater significance in the prevention of hyperlipidemia or cardiovascular disease