Fleenor W A, Stott G H
J Dairy Sci. 1980 Jun;63(6):973-7. doi: 10.3168/jds.S0022-0302(80)83034-7.
A practical field method for measuring immunoglobulin concentration in bovine colostrum has been developed from the linear relationship between colostral specific gravity and immunoglobulin concentration. Fourteen colostrums were collected within 24 h postpartum from nursed and unnursed cows and were assayed for specific gravity and major colostral constituents. Additionally, 15 colostrums were collected immediately postpartum prior to suckling and assayed for specific gravity and immunoglobulin concentration. Regression analysis provided an equation to estimate colostral immunoglobulin concentration from the specific gravity of fresh whole colostrum. From this, a colostrometer was developed for practical field use.
基于初乳比重与免疫球蛋白浓度之间的线性关系，开发了一种用于测量牛初乳中免疫球蛋白浓度的实用现场方法。从产后24小时内哺乳和未哺乳的奶牛中收集了14份初乳，并对其比重和主要初乳成分进行了测定。此外，在产后立即哺乳前收集了15份初乳，并对其比重和免疫球蛋白浓度进行了测定。回归分析提供了一个根据新鲜全初乳的比重来估计初乳免疫球蛋白浓度的方程。据此，开发了一种用于实际现场使用的初乳比重计。
