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- W2029121675 abstract "Whole-cell glucose isomerase from a Streptomyces spp. was immobilized by entrapment in gelatin matrices crosslinked with glutaraldehyde. The resultant immobilized enzyme preparation had up to 40% recovery yield of the activity and showed relatively long stabilities during storage and the isomerizing reaction. The storage half-life of the preparation was 19 months at 5°C and the half-life of the enzyme during operation was 260 days in the presence of 1 mM Co2+ and 80 days in the absence of the metal ion. Optimum pH and temperature were 7.5 and 70–75°C, respectively. The Km values for glucose and fructose were 0.29 and 0.46 m, respectively, with a maximum theoretical conversion yield of 56%. The simulation results based on the reversible one-substrate enzyme kinetic model agreed well with the experimental data obtained from a batch reactor. The continuous operation of packed bed reactors demonstrated that some effects of the external film diffusion resistance were apparent at low flow rates of the substrate feed solution, whereas the internal pore diffusion resistance was negligible up to the pellet size used in this work." @default.
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- W2029121675 date "1980-07-01" @default.
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- W2029121675 title "Studies on microbial glucose isomerase: 4. Characteristics of immobilized whole-cell glucose isomerase from Streptomyces spp." @default.
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- W2029121675 doi "https://doi.org/10.1016/0141-0229(80)90052-6" @default.
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