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A shaking bioreactor system with twin internal ceramic membranes was developed for effective perfusion culture and applied to the continuous production of acetic acid using Acetobacter pasteurianus. The system makes it possible to carry out the back-washing of the membrane without stopping the continuous operation because one membrane can be washed by medium feed flow while another membrane provides...
The singlet oxygen quenching activities of carotenoids, β-carotene, free astaxanthin, its monoester and its diester, were examined in vitro by a simple and rapid method for the measurement of Methylene Blue-sensitized photooxidation of linoleic acid in the hexane/ethanol solvent system. The concentrations of carotenoids, β-carotene, free astaxanthin, its mono- and di-ester, required for 50% inhibition...
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