الفهرس 
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Abstract
My study is concerned with properties pectin in Speacified plant material and in extracts of this matertial. this study may lead to a better use of pectin and may also give useful information on the structural features of this material. in Chapter 2, the literature on pectin researcne is reviewed. chapter 3 presents the experimental part of this thesis, chapter 4 comprisses the results and the discussion. the last chapter 5 summerizes the results.