|
|||||
|
|
Effect of ammoniation of rapeseed meal on the sinapine content of the meal |
|
| Authors: | Y K Goh A Shires A R Robblee D R Glandinin |
| Institution: | Department of Animal Science , University of Alberta , Edmonton , Alberta , Canada , T6G 2P5 |
| Abstract: | 1. Two experiments were conducted to study the effects of ammoni‐ation of rapeseed meal on its sinapine content. 2. In the first experiment, five samples of a low‐glucosinolate meal (produced from Regent, Candle or Tower cultivars) and one sample of a high‐glucosinolate meal were eluted by one passage of ethanol ammoniated to concentrations of 0.2, 0.5 or 1.0 M NH3 at the ratio of 2 1 ammoniated ethanol/kg meal. Elution with 1.0M ammoniated ethanol decreased the sinapine content of the meals by as much as 80%. 3. In the second experiment, four low‐glucosinolate meals (from Candle cultivar) from a pilot processing plant were used. Two of the meals were obtained by sparging during desolventising with or without anhydrous ammonia (50 g anhydrous ammonia/kg meal) and two of the meals were produced by sparging during desolventising with or without hydrous ammonia (50 g anhydrous ammonia and 50 g steam/kg meal). Ammonia with steam caused the greatest decrease (65%) in sinapine content. 4. Total glucosinolate and 5‐vinyl‐2‐oxazolidinethione concentrations in the meals were also decreased (17 to 35%) by the ammoniation treatments in experiment 2. |
| Keywords: | |