Elementary Research Into The Chemical Composition And Its Bacteriostasis Of Nidula Niveotomentosa Leavening

This thesis, guided by microbial zymology, phytochemistry and theory of chemical separation, deals with isolation and purification of chemical composition of ethyl acetate extractive from mycelia of Nidula niveotomentosa and deals with determination of the bacteriostasis of the chemical composition, after the bacteriostasis of the extractive from fermenting liquor and mycelia of Nidula niveotomentosa had been tracked and detected in the elementary stage. The following are the results of the study.Both the 12.5mg/m ethyl acetate extractive of fermenting liquor and mycelia had the same inhibitory effect on Staphylococcus aureus. The 6.25mg/mL ethyl acetate extractive of fermenting liquor was noticeably inhibitory to Bacillus megaterium, with no effect on Bacillus prodigious, but by contrast, The 6.25mg/mL ethyl acetate extractive of mycelia was noticeably inhibitory to Bacillus prodigious with no effect on Bacillus megaterium. Both the ethyl acetate extractive of fermenting liquor and that of mycelia with the same concentration of 25mg/mL were obviously inhibitory to Bacillus subtilis. The MICs of the ethyl acetate extractive of fermenting liquor were respectively 25mg/mLand 12.5mg/mL,when inhibitory to Escherichia coli and Bacillus subtilis. Both ethyl acetate extractives were no inhibitory to Proteus species.The ethyl acetate extractive of fermenting liquor was inhibitory to Colletotrichum lagenarium with its MIC being 6.25mg/mL, while the ethyl acetate extractive of mycelia was not inhibitory to Colletotrichum lagenarium. Both the 25mg/mL ethyl acetate extractives were inhibitory to Alternaria alternata and Alternaria brassicae. Especially, the ethyl acetate extractive of mycelia was more inhibitory to Phytophthora capsici and Ceratobasidium corniger than that of fermenting liquor. Both the ethyl acetate extractives were inhibitory to Verticilliu dahliae.Both the 25mg/mL ethyl acetate extractives were not inhibitory to moulds.Both the 25mg/mL nbutanol extractives of fermenting liquor and mycelia were not inhibitory to bacteria or plant pathogenic bacteria.Three compounds were isolated from the ethyl acetate extractive of mycelia of Nidula...