【摘要】 为了研究诱变后混合菌的生长情况,我们采用Leathen和9K培养基,培养保存2年的诱变菌群和连续传代的诱变菌群,做出它们的生长曲线。结果表明:连续传代的诱变菌群2天达到稳定期,而保存2年的诱变菌群生长达到稳定期,需要多生长2天;在培养基中,加入矿浆浓度(2%、4%、8%、16%、32%)的硫化锌矿,矿浆浓度在32%时E茵群生长量最高;矿浆浓度4%、8%、16%时B菌群生长量最高;矿浆浓度2%时D菌群生长量最高。实验结果说明:混合菌诱变可以大大提高菌群在锌矿中生长能力。更多还原

【Abstract】 In order to investigate the growth status of mixed bacteria after mutation,two groups of mixed bacteria,one conserved for two years,another sub-cultivated all long,were cultivated on leathen and 9k media.The results show that the bacteria group sub-cultivated all long needs two days to reach stationary phase,while the bacteria group conserved for two years needs two more days.The growth concentration of group E of bacteria is highest on medium containing 32% zinc sulfide ore. When 40%,80% or 16% zinc sulfide ore is added to medium,group B of bacteria grow best.Whereas,group D of bacteria grows better than the other groups on medium containing 2% zinc sulfide ore.These results indicate that mutation of mixed bacteria can improve greatly the abilities of bacteria groups on zinc sulfide ore.更多还原