Shenoy K B, Hegde S N
Department of Biosciences, Mangalore University, India.
Arch Int Physiol Biochim Biophys. 1993 May-Jun;101(3):217-20. doi: 10.3109/13813459309046478.
Mucosal surface area, protein, DNA and RNA content, [3H]-thymidine incorporation, total activity of glucosidases, peptidases, phosphatases and transaminases were measured in the duodenum and in the middle and lower parts of the small intestine of the domestic pigeon Columba livia. Mucosal surface area, protein, nucleic acid content and [3H]-thymidine incorporation were significantly higher in the duodenum and in the middle part of the small intestine than in the lower part. Whereas the activities of alkaline phosphatase, sucrase, cellobiase and lactase were significantly higher in the middle part of the small intestine, those of maltase, glucoamylase and leucine aminopeptidase were significantly higher in the lower part. It is concluded that in Columba livia small intestine, regional differences are more pronounced between the middle and the lower parts of the small intestine than between this middle part and the duodenum.
测定了家鸽（Columba livia）十二指肠以及小肠中、下段黏膜表面积、蛋白质、DNA和RNA含量、[³H] - 胸苷掺入量、糖苷酶、肽酶、磷酸酶和转氨酶的总活性。十二指肠和小肠中段的黏膜表面积、蛋白质、核酸含量以及[³H] - 胸苷掺入量显著高于下段。小肠中段碱性磷酸酶、蔗糖酶、纤维二糖酶和乳糖酶的活性显著较高，而麦芽糖酶、葡糖淀粉酶和亮氨酸氨肽酶的活性在下段显著较高。得出结论：在家鸽小肠中，小肠中、下段之间的区域差异比中段与十二指肠之间的区域差异更为明显。
