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Adding a certain concentration of Pb2+ to the culture medium. Two strong lead-resistant strains of microorganisms labeled as J13 and Y7, were selected from six soil samples, J13 and Y7 belongs to Erwinia sp. and Bacillus respectively through preliminary identification. J13 and Y7 were inoculated into culture medium which added with PbCO3 and carried out activation test of lead in precipitation fraction...
The effects of ultra high-pressure (UHP) on the growth and its ability of beta-carotene biosynthesis of Rhodotorulaglutinis RG-8 were studied. After the treatments of 5 repeated cycles at 300 MPa for 15 min, the barotolerant mutant RG-8-9 was obtained from this strain. The survival ratio of the parent strain RG-8 was increased from 1.40times10-3% after the treatment of first cycle to 1.47times10-1...
This paper reported the formulation of culture medium for the production of superoxide dismutase (SOD) by Rhodotorula glutinis RY-06 strain with high yield of beta- carotene. The optimum composition of medium was as follows: sucrose as carbon source, peptone as nitrogen source, the ratio of carbon source to nitrogen source as 1:1 (w/w), 500 mumol/L of Fe3+ (using FeCl3) as metal ion of the coenzyme...
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