title: Stability of carotenoid diets during feed processing and under different storage conditions.
abstract: The stability of formulated carotenoid diets during feed processing and under different storage conditions were studied. All carotenoid diets were split into two groups with one group containing BHT (acting as an antioxidant) at 250 ppm and the other without BHT. The experiment was divided into two parts. First, all diets were evaluated in total carotenoid (TC) loss during feed processing, in dry mixed feeds after being processed and dried. In the final part, the completed dietary carotenoids were stored in an aluminum foil bag, the top of which was sealed with a bag sealer and kept under different storage conditions at 26-28 °C and 4 °C. The stability of the TC was observed during an 8-week trial period. The results showed that the diet pelleting process did not affect the carotenoid content of the diets, and the best storage temperature for the formulated carotenoid diet  was at 4 °C. However, an antioxidant was added to assist in energy saving before feed processing. Thus, the addition of BHT at 250 ppm can be done at normal room temperature in order to reduce oxidation that might cause a loss of TC quantities in diets.
authors.affiliation: Department of Aquaculture, Faculty of Fisheries, Kasetsart University, Bangkok 10900, Thailand. ffisora@ku.ac.th
authors.forename: Orapint
authors.initials: O
authors.lastname: Jintasataporn
authors.forename: Bundit
authors.initials: B
authors.lastname: Yuangsoi
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D000975:Antioxidants / Q000737:chemistry; D002084:Butylated Hydroxytoluene / Q000737:chemistry; D002338:Carotenoids / Q000032:analysis*; D005399:Fishes; D005519:Food Preservation / Q000379:methods*; D061353:Food Storage / Q000379:methods*; D005526:Food, Formulated / Q000032:analysis*; D010084:Oxidation-Reduction; D013696:Temperature
chemical_list: D000975:Antioxidants; D002084:Butylated Hydroxytoluene; D002338:Carotenoids