EFFECT OF TREATMENT TEMPERATURE ON DIETARY QUALITY OF AMMONIA FIBER EXPLOSION (AFEX) TREATED CASEIN FOR RATS Academic Article uri icon

abstract

  • Dietary quality of casein treated by the ammonia fiber explosion (AFEX) process was evaluated in weanling Sprague-Dawley rats. Two 19 day trials were conducted, in which four animals received one of the four (first trial) or five (second trial) treatment diets. Animal performance, nitrogen digestion characteristics and biological value were determined for diets (protein content 18%) containing untreated casein or casein AFEX treated at 40, 60, 80, or 100C. AFEX treatment at temperatures of 40-100C did not detrimentally effect (P > 0.10) feed intake, weight gain, or nitrogen intake. AFEX treatment at 60C increased (P < 0.05) feed efficiency by 7% over controls. Higher (P < 0.05) fecal (0.23 vs. 0.15 g per 5 days) and urinary nitrogen (1.26 g vs. 1.12 g per 5 days), as well as reduced (P < 0.05) apparent nitrogen digestibility (91.4% vs. 94.2%), nitrogen retention (43.6% vs. 49.4%), and biological value (47.8% vs. 52.4%) were observed for diets containing casein treated at 60C and higher temperatures vs. controls. Results from this study suggest decreased casein digestion and absorption, and decreased utilization of absorbed nitrogen with AFEX treatments of 60C and higher. 1995.

published proceedings

  • ANIMAL FEED SCIENCE AND TECHNOLOGY

author list (cited authors)

  • ASHOK, G., TURNER, N. D., BYERS, F. M., HOLTZAPPLE, M. T., & OVERHULSE, K. A.

citation count

  • 2

complete list of authors

  • ASHOK, G||TURNER, ND||BYERS, FM||HOLTZAPPLE, MT||OVERHULSE, KA

publication date

  • July 1995