To our thinking there are dimerisation phenomena in the umbelliferone solutions at high concentration .

认为在高浓度 伞形 酮溶液中存在着二聚现象。

The fluorescence spectra of umbelliferone ( 7-hydroxycoumarin ) solutions at different concentrations in various solvents are compared and studied .

对比研究了数种溶剂中不同浓度 伞形 酮 溶液的荧光光谱。

Fluorescence spectra of umbelliferone in various solutions and its dimerisation

伞形 酮在不同溶剂中的荧光光谱及其二聚作用

External use of either xanthotoxin or umbelliferone alone in normal rats showed that the chromosomes of the myelocyte were mutated at an aberrant rate of 2.0 % and 0.2 % respectively ( P < 0.01 ) .

以正常大鼠为实验对象，观察单纯外用 花椒 毒 内酯， 结 香 甲素，连续给药 7d，致骨髓细胞染色体畸变率相应各达2%及0.2%。两者比较具显著性差异（P＜0.01）。