title: Effect of radiation on chemical composition and protein quality of cottonseed meal.
abstract: This study was conducted to compare the effects of electron beam (EB) and gamma ray (GR) irradiation treatments at doses of 10, 20 and 30 kGy on chemical composition, protein quality and protein digestibility of cottonseed meal (CSM). GR irradiation in all doses significantly decreased the crude fiber of samples compared to raw CSM. Free and total gossypol content of CSM was decreased significantly by utilizing both types of irradiation in a dose-dependent manner. Also, EB irradiation caused decrease in free and total gossypol content more than that of GR irradiation. GR irradiation at doses of 20 and 30 kGy, and EB irradiation at doses of 10, 20 and 30 kGy can significantly decrease protein solubility of CSM compared to that of a raw sample. GR irradiation at a dose of 30 kGy significantly increased apparent digestibility of protein compared to raw and EB irradiation of CSM at a dose of 10 kGy in Leghorn cockerels. Maximum increase in protein digestibility of CSM was observed in GR irradiation at a dose of 30 kGy. In conclusion, the present study showed that EB and GR irradiation reduced gossypol and crude fiber and increased protein digestibility of CSM but had no effect on protein quality of CSM.
authors.affiliation: Department of Animal Science, Animal Science and Food Technology Faculty, Ramin Agriculture and Natural Resources University of Khouzestan, Ahwaz, Iran.
authors.forename: Zohreh
authors.initials: Z
authors.lastname: Bahraini
authors.affiliation: Department of Animal Science, Animal Science and Food Technology Faculty, Ramin Agriculture and Natural Resources University of Khouzestan, Ahwaz, Iran.
authors.forename: Somayyeh
authors.initials: S
authors.lastname: Salari
authors.affiliation: Department of Animal Science, Animal Science and Food Technology Faculty, Ramin Agriculture and Natural Resources University of Khouzestan, Ahwaz, Iran.
authors.forename: Mohsen
authors.initials: M
authors.lastname: Sari
authors.affiliation: Department of Animal Science, Animal Science and Food Technology Faculty, Ramin Agriculture and Natural Resources University of Khouzestan, Ahwaz, Iran.
authors.forename: Jamal
authors.initials: J
authors.lastname: Fayazi
authors.affiliation: Agricultural, Medical, and Industrial Research School, Nuclear Science & Technology Research Institute, Karaj, Iran.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Behgar
mesh_terms: D000821:Animal Feed / Q000032:analysis* / Q000528:radiation effects*; D000818:Animals; D002645:Chickens / Q000097:blood / Q000502:physiology; D003369:Cottonseed Oil / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects*; D004043:Dietary Fiber / Q000528:radiation effects*; D004044:Dietary Proteins / Q000528:radiation effects*; D004063:Digestion; D004307:Dose-Response Relationship, Radiation; D004583:Electrons; D063427:Food Quality; D005720:Gamma Rays; D006072:Gossypol / Q000032:analysis; D011829:Radiation Dosage; D012995:Solubility; D014527:Uric Acid / Q000097:blood
chemical_list: D003369:Cottonseed Oil; D004043:Dietary Fiber; D004044:Dietary Proteins; D014527:Uric Acid; D006072:Gossypol
keywords: crude fiber; electron beam; gamma irradiation; gossypol; protein quality