Reform on the examination of molecular biology / 中华医学教育探索杂志

To analyse and compare the advantages and disadvantages of various kinds of examinations in teaching molecular biology,and detail the process and effect of thesis proseminar domained examination.

COMPOUND MUTATION BREEDING OF KOJIC ACID PRODUCTION STAIN / 微生物学通报

mutant (UCN 7 17) of producing high yield Kojic acid was screened fr om Aspergillus flavus after treated with UV three times, ? ray of 60 Co one time and NTG four times, underoptimal conditions, the Kojic aci d production level reached up to 6 3% after 7 days, compared with original stains 0 926% The experiments showed that compound mutation using various mutagenic agents ca n alter the original stains sensitivity to mutagenic agents, increase mutation frequency and raise Kojic acid yield