Nutritive Material of Rana chensinensis by Multivariation Analysis Methods;

Being affected by it,the mercury concentration in the plants and the amphibian,Rana Chensinensis of the polluted samples was much higher than that of the unpolluted samples.

In this disquisition, the research mostly concentrated on the results that the Rana chensinensis which was the typical amphibian in the river- forest wetland of northern China and its tadpole absorbed and concentrated mercury and methyl-mercury.

Anatomical and histological structures of ovary, oviduct, uterus and testis of forest frog were detailed based on the anatomical observation and H E stain of sexual glands.

The phenomenons such as growth slowly, high death rate, the change of behavior and the growth of young frog have been studied within the feeding population of the forest frog moved to the South.

LPⅠ,the mixture of antibiotic protein and peptide was separated from skin of Changbai Mountain forest frog with gel filtration chromatography.

There are two wood frogs-Rana kunyuensis,and R.

Based on the microecological principle,lactic acid bacteria were isolated from the intestinal tract of healthy wood frog by two kinds of isolation methods and purified and identified further.

Acute toxicity of Cu~(2+) and Cr~(6+) to Rana chensinensis tadpoles;

Toxic effect of cadmium on renal microstructure of Rana chensinensis;

Inductive effects of cadmium chloride on micronuclei and nuclear anomalies in erythrocytes of Rana chensinensis;