Effect of storage on the physical and chemical properties of rapeseed (Brassica napus) oil [electronic resource].

Includes references.

Biochemical evaluation of rapeseed oil was conducted to study tbe oil content, physical andc:bemical properties - and- stability ofcrude rapeseed oil. Rapeseed oil was extracted from seeds of Pactol variety grown at tbree different locations and for two successive seasons (2000 and 2001). The highest oil content was reeorded in sample Eoynat's East, season 2001; (47.59±1: 0.18%) and the lowest oil content was found in sample Giza, season 2000; (43.35 ±I: 0.19%). The stability of rapeseed oil samples during storage at room temperature for 8 weeks was measured. The highest acid value was in sample Eoynat's East, season 2000; (3.33 ±I: 0.11 at zero time and 3.59 ::I: 0.09 after 8 weeks), peroxide value was in sample Eoynat's East, season 2001; (4.68±1: 0.08 at zero time and 40.37:1: 0.08 m.eq./kg. after 8 weeks) and TBA was in sample Serw, season 2001; (20.65±0.83 at zero time and 183.58 ±I: 1.31 after 8 weeks). The lowest acid value was in sample Serw, season 2000; (1.67± 0.03 at zero time and 3.15 ± 0.07 after 8 weeks), peroxide value was in sample Giza, season 2000; (3.17 ± 0.07 at zero time and 30.16 :I: 0.08 m.eq. /kg. after 8 weeks) and TBA was in sample Eoynat's East, season 2000; (12.07 ± 0.80 at zero time and 170.24± 1.67 after 8 weeks).±

Summary in Arabic.

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