Heller R, Cercasov V, von Engelhardt W
Comp Biochem Physiol A Comp Physiol. 1986;83(4):687-91. doi: 10.1016/0300-9629(86)90710-3.
The retention times of fluid and particles of different lengths were measured in the digestive tract of the llama. PEG was used as a fluid marker; hay particles were labelled with cerium or samarium and the samples were determined by neutron activation analysis. In compartments 1 and 2 the retention time of fluid (9.7 hr) was significantly shorter than that of particles having a length of 0.2-1.0 cm (19.2 hr) and 2.5-4.0 cm (25.0 hr). In the intestine slightly significant differences in the retention times of fluid (20.1 hr) and particles (26.2 hr) were seen. In the whole digestive tract retention times were 36.2 hr for fluid, 52.0 hr for smaller particles and 59.9 hr for larger particles.
在美洲驼的消化道中测量了不同长度的液体和颗粒的保留时间。聚乙二醇用作液体标记物；干草颗粒用铈或钐标记，样品通过中子活化分析测定。在第1和第2个隔室中，液体的保留时间（9.7小时）明显短于长度为0.2 - 1.0厘米的颗粒（19.2小时）和2.5 - 4.0厘米的颗粒（25.0小时）。在肠道中，液体（20.1小时）和颗粒（26.2小时）的保留时间存在轻微显著差异。在整个消化道中，液体的保留时间为36.2小时，较小颗粒为52.0小时，较大颗粒为59.9小时。
