Use method of polishing for Three varieties of dates and Study the Physical Properties after a period of six months storage.

	Use method of polishing for Three varieties of dates and Study the Physical Properties after a period of six months storage.
journal of kerbala university
Article 1, Volume 12, Issue 0, 2016, Pages 64-74 PDF (0 K)
Abstract
This study was conducted to apply glazing on dates fruit. It was conducted through heat treatment and dipping in glazing solution . The dates were stored for 6 month in refrigeration. Three cultivars of dates (Azraq azraq, Ibraheemi and Zahdi ) were obtained From the Iraq Company for dates marketing this company was granted ISO Certificate ,and this work was conducted in their establishment. Dates were fumigated with 1% methyl bromide as insecticide, then sorted, cleaned, washed, and drained . The dates exposed to heat (120,125,130C°) for 10 min . then dipped either in : 5% glycerol or 20% Dibis, or 5% glycerol +20% Dibis, or 5% glycerol +20% Glucose syrup . The dates were packed in polyethylene packages of 200g each and stored at 5 C° for 6 months . Physical determination were conducted: Total soluble solids(TSS), refractive index, color, pH of the fruits before and after treatments . Cold Storage minimized chemical and physical changes in dates, less discoloration, less PH changes..etc. Which are considered as important quality parameters, a above all no insect infestation .It was concluded that the best glazing medium was 5% glycerol +20% Glucose syrup followed by 5% glycerol +20% Dibis, while the best heat treatment was 130 C°. As for the cultivars Azraq azraq ranked the best compared to other Ibrahemi& Zahdi cultivars.

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