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There is a small scale repeat sequences in virus genome,because much of prokaryotic nucleotides are encoding sequences.If there occur a repeat or inverted phase in prokaryotic genome,probably it… (More)
Based on single factor test,the solid state fermentation(SSF) medium to produce β-galactosidase by Aspergillus oryzae GN-1 were optimized by L9(33) orthogonal test. The results showed that the… (More)
We randomly selected 10 plant intake water samples in order to evaluate the quality of ground water in Lanzhou city.According to GB / T 5750.5-2006 and GB / T 14848-93,the content of sulfate,… (More)
Nineteen kinds of fruits and vegetable extraction were used to evaluate their scavenge nitrite ability by spectrophotometer.The results showed that all materials had effective at 25 ℃.The scavenge… (More)