KMID : 0380019950100030257
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Korean Journal of Biotechnology and Bioengineering 1995 Volume.10 No. 3 p.257 ~ p.262
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Studies on the Fractional Precipitation of Dextran by Nonsolvent Addition Method
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Abstract
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Fractional precipitation of "native"dextran by the method of nonsolvent addition was studied. Precipitational phenomenon of fractioned dextran was characterized with the quantitative determina¡©tion of the precipitational capacity of nonsolvents with different dielectric constants. Based upon this characterization, the fractional precipitation process for the dextran production was developed. From the precipitational characteristics, a first-order relationship between the molecular weight of fractioned dextran and the content of nonsolvents was formulated. The slopes of the first-order equation were correlated with the dielectric constants of the nonslovents. A modified fractionation process was con¡©structed on the basis of refractionation method and employed to increase the efficiency of the con¡©trolled production of dextran.
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