Köhler R, Zebrowska T, Gebhardt G
Arch Tierernahr. 1978 May;28(5):317-27. doi: 10.1080/17450397809426809.
The endogenous nitrogen in the duodenum and the distal segment of the small intestine of 3 fistulated pigs fed a 15-N-labelled feed protein was determined using the isotope dilution technique. Over 24 hours, the endogenous N secretion was found at least 12.5 g at the end of the duodenum. For the upper segment of the small intestine, a statistically secured correlation between endogenous nitrogen and chyme amount was found to exist. It was possible to determine the true and apparent absorption of the nitrogen for both individual segments of and the whole digestive tract.
采用同位素稀释技术测定了3头饲喂15-N标记饲料蛋白的瘘管猪十二指肠和小肠远端的内源氮。在24小时内，十二指肠末端的内源氮分泌量至少为12.5克。对于小肠上段，发现内源氮与食糜量之间存在统计学上确定的相关性。可以确定消化道各个节段以及整个消化道氮的真吸收和表观吸收情况。
