Zobrazeno 1 - 2
of 2
pro vyhledávání: '"Yan Jing Xu"'
Publikováno v:
Advanced Materials Research. :664-669
Acid stability of Bacillus licheniformis alpha amylase (BLA) was improved by error-prone polymerase chain reaction. The mutated BLA gene was expressed in Escherichia coli. An acid stability double mutant (K344R/H405R in BLA) was isolated. Two single
Publikováno v:
Advanced Materials Research. :6048-6052
Piston ring is one of the most important sealing components that can be easily damaged in reciprocating compressors. The severe non-uniformity of the pressure distribution was suggested to be the essential reason for the premature failure of the pist