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Title: | OPTIMISATION DES CONDITIONS D’EXTRACTION DES POLYPHENOLS DE DATTES LYOPHILISEES (Phoenix dactylifera L) VARIETE GHARS |
Authors: | TELLI A MAHBOUB N BOUDJENEH S SIBOUKEUR O. E. K MOULTI-MATI. F |
Keywords: | dates Ghars variety optimization polyphenols stages of ripening |
Issue Date: | 2010 |
Series/Report no.: | volume 2 numéro 2 AST 2010; |
Abstract: | This work was conducted to optimize extraction conditions of polyphenols from date fruit variety Ghars (Kimri I or Kh’lal). The effects of solvent type (methanol and ethanol), solvent/water ratio, sample/solvent ratio and extraction time were studied. High values of total polyphenols content (PPt) were obtained at an 80/20 solvent/water ratio, at a 1/6 solid/liquid ratio and at 5 hours. The optimization results showed that the methanol was the most efficient solvent for polyphenols extraction. The evolution of total polyphenols content during three stages of ripening (Kimri I or Kh’lal I, Khalal or Bser and Tmar) was studied. The PPt content decreased from 892.14 mg EAG/10g of dry weight (DW) at Kimri I stage to 4.22 mg EAG/10g DW at Tamr stage. |
Description: | AST Annales des Sciences et Technologie |
URI: | http://dspace.univ-ouargla.dz/jspui/handle/123456789/6359 |
ISSN: | 2170-0672 |
Appears in Collections: | volume 2 numéro 2 AST 2010 |
Files in This Item:
File | Description | Size | Format | |
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A020201.PDF | 278,63 kB | Adobe PDF | View/Open |
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