D-Amino acids in mouse tissues are not of microbial origin

Summary Neutral free D-amino acid contents in the serum, kidney, liver, brain, small intestine and urine in germ-free mice and those in specific pathogen-free mice were compared. No significant difference was found. This strongly suggests that the free D-amino acids which were shown to be present in mice in our previous work^{1, 2} did not originate from the enteric microbial flora.     

无籽西瓜无菌萌发条件的研究

研究了无籽西瓜在无菌条件下萌发的各种条件,得出:种子消毒污染率最低方法为250PPM的二氧化氯与0.15％升汞联合消毒,而以250PPM二氧化氯与2％次氯酸钠联合消毒方法种子的萌发率最高,无菌萌发的理想条件为无菌水加纱布。