clavulanic acid is produced industrially by fermentation of streptomyces clavuligerus and researches have increased its production by strain improvement, recombinant dna technology, and media composition and growth condition optimization. the main objective of this study was to increase the level of clavulanic acid production from streptomyces clavuligerus (dsm 738), using uv irradiation. after...

objective(s):[p1]  this study highlights xylanase overproduction from bacillus mojavensis via uv mutagenesis and optimization of the production process. materials and methods:bacillus mojavenis ptcc 1723 underwent uv radiation. mutants’ primary screening was based on the enhanced hollow zone diameter/ colony diameter ration (h/c ratios) of the colonies in comparison with the wild strain on xyla...

As an important industrial enzyme, protease is widely used in feed, food and other fields. At present, the insufficient activity obtained from microorganisms cannot meet purpose of production. In this study, Bacillus amyloliquefaciens with high production was screened animal feces by plate transparent circle method. To improve protease, atmospheric room temperature plasma (ARTP) mutagenesis fir...

The current SARS-CoV-2 pandemic underscores the importance of understanding evolution RNA genomes. While is subject to formation similar lesions as DNA, evolutionary and physiological impacts have on viral genomes are yet be characterized. Lesions that may drive can induce breaks repaired by recombination or cause base substitution mutagenesis, also known editing. Over past decade so, editing m...

It has been proposed that spin-polarized cosmic radiation can induce asymmetric changes in helical biopolymers may account for the emergence of biological homochirality. The parity violation weak interaction direct consequences on transport polarization ray showers. In this paper, we show muons retain their down to energies at which they initiate enantioselective mutagenesis. Therefore, are mos...