目的：尝试提取人体肠道菌群总dna，为研究肠道菌群结构提供依据。

Objective: Extracting total DNA of intestinal tract bacteria from human faeces to investigate intestinal microflora.

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目的：用DNA指纹图谱技术分析中长跑运动员肠道菌群区系结构的特征。

Objective: To analyze the bacterial community structural (BCS) dynamics in intestinal tract of long and middle distance runners by DNA fingerprinting.

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目的分析胆管结扎对SD大鼠肠道双歧杆菌菌群结构组成的影响。

Objective To analyze the influence of bile duct ligation on the structure and composition of gut Bifidobacteria in SD rats.

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