Nutritional Value of Sesame Meal Treated by Gamma Ray and Microwave Irradiation

The aim of this study was to evaluate the effect of Gamma Ray irradiation (GR) at doses of 20 and 40 kGy and Microwaving (MW) at 800W for 3 and 5 minutes on ruminal degradation kinetics and in vitro digestibility of Sesame Seal (SSM). Degradability parameters of irradiated samples were measured by nylon bag technique. The amount of histidine, threonine, valine, alanine, arginine, glutamine, glycine, and serine were lower, but the amount of methionine and phenylalanine were higher in GR and MW treated samples compared to untreated ones. Irradiation reduced the fiber content of SSM and altered its chemical composition compared to the untreated SSM. Ruminal degradability of DM (Dry Matter) and CP (Crude Protein) was diminished in the treated SSM. Effective Degradability (ED) of DM and CP was found to be lower in the GR irradiated SSM compared to the MW irradiated SSM and the control. After 16 hours of ruminal incubation of the treated SSM, the degradability of isoleucine, methionine, phenylalanine, and threonine were lower, but those of glycine and serine were higher. The in vitro Digestibility of DM (DMD) and Organic Matter (OMD), as well as the Organic Matter in the Dry matter (DOMD) were lower and higher in GR and MW irradiated SSM, respectively, compared to unirradiated SSM. It can be concluded that irradiation of sesame meal by gamma ray irradiation was effective in protecting crude protein and some amino acids, including methionine and phenylalanine, from ruminal degradation.

Nutritional Value of Sesame Meal Treated by Gamma Ray and Microwave Irradiation Keywords:

Degradability parameters , In vitro Digestibility , Ruminal degradation.