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Chemical and technological studies on pomegranate fruit products / Nehal Rafik Abdel Mohsen ; Supervised Ferial Abdelaziz Ismail , Shafika Abdelhamid Zaki , Somia Hassan Abdelatif

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Nehal Rafik Abdelmohsen , 2015Description: 107 P. : charts ; 25cmOther title:
  • دراسات كيمائية وتكنولوجية على منتجات ثمار الرمان [Added title page title]
Subject(s): Available additional physical forms:
  • Issued also as CD
Dissertation note: Thesis (M.Sc.) - Cairo University - Faculty of Agriculture - Department of Food Science and Technology Summary: The present investigation aimed compare the effect of different processing methods on some physico-chemical properties of two Egyptian pomegranate fruits (Manfalouty and Wardey) and their products (fresh and concentrated juices, jellies) as well as to assess the potential of utilization of pomegranate by-products (seeds and peels). Two methods of extraction were applied whole fruit and blending). Clarification was performed by either adding 0.2% gelatin or centrifugation at 4000rpm/15min, and pasteurization at 79-81oF for 30min. The obtained results indicated that juice obtained from arils alone showed higher yield, but lower anthocyanin, pectin, phenolics and antioxidant activity compared to that from whole pomegranate fruit. Clarification and pasteurization methods caused noticeable decrements in Vitamin C, anthocyanin, pectin, tannins and antioxidant activity contents of pomegranate juice for the two varieties. The phenolic compounds of Manfalouty showed higher contents of vanillic, chlorogenic, ferulic and ellagic acid compared to Wardey juice. Storage of Manfalouty and Wardey concentrated juice decreases total sugars, vitamin C, tannins, and anthocyanin contents. The rate of decrease was higher in samples stored at room temperature (250C) than those stored at 40C. The phenolic compounds, showed higher contents for Protocatechoic, P-Coumaric, Chlorogenic and Ellagic acids, Catechin and Epicatechin for Manfalouty than Wardey peels
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Item type Current library Home library Call number Copy number Status Date due Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.07.09.M.Sc.2015.Ne.C (Browse shelf(Opens below)) Not for loan 01010110066201000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.07.09.M.Sc.2015.Ne.C (Browse shelf(Opens below)) 66201.CD Not for loan 01020110066201000

Thesis (M.Sc.) - Cairo University - Faculty of Agriculture - Department of Food Science and Technology

The present investigation aimed compare the effect of different processing methods on some physico-chemical properties of two Egyptian pomegranate fruits (Manfalouty and Wardey) and their products (fresh and concentrated juices, jellies) as well as to assess the potential of utilization of pomegranate by-products (seeds and peels). Two methods of extraction were applied whole fruit and blending). Clarification was performed by either adding 0.2% gelatin or centrifugation at 4000rpm/15min, and pasteurization at 79-81oF for 30min. The obtained results indicated that juice obtained from arils alone showed higher yield, but lower anthocyanin, pectin, phenolics and antioxidant activity compared to that from whole pomegranate fruit. Clarification and pasteurization methods caused noticeable decrements in Vitamin C, anthocyanin, pectin, tannins and antioxidant activity contents of pomegranate juice for the two varieties. The phenolic compounds of Manfalouty showed higher contents of vanillic, chlorogenic, ferulic and ellagic acid compared to Wardey juice. Storage of Manfalouty and Wardey concentrated juice decreases total sugars, vitamin C, tannins, and anthocyanin contents. The rate of decrease was higher in samples stored at room temperature (250C) than those stored at 40C. The phenolic compounds, showed higher contents for Protocatechoic, P-Coumaric, Chlorogenic and Ellagic acids, Catechin and Epicatechin for Manfalouty than Wardey peels

Issued also as CD

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