飼料中非蛋白氮ppt課件-wenkub.com
2025-05-04 12:05 本頁面
【正文】 32 Separation by tricloroacetic acid Sample Urea (g) Melamine (g) Ammonium sulfate (g) True protein % 0 0 0 0 0 0 0 0 0 Separation by sodium tungstate 0 0 0 0 0 0 0 雙匯公司的研究結(jié)果 33 Separation by copper sulfate in alkaline solution 0 0 0 0 0 0 0 0 34 A critical study of methods for the determination of nonprotein nitrogen Pamela M. Bell ? Some twenty methods for the removal of protein from biological materials were used to prepare the nonprotein nitrogen fraction from skim milk, serum, a water extract of flour, and a water extract of bran. The results obtained by different methods on one solution or the same methods on different solutions were not entirely concordant and showed that NPN fractions obtained in these ways cannot validly be pared. ? Dialysis or related techniques appeared to achieve separations most closely related to NPN as theoretically defined.
教學課件相關推薦
鄂ICP備17016276號-1