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Effect of pH on the molecular weight of poly-3-hydroxybutyric acid produced by Alcaligenes sp.

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Summary

The molecular weight of a polymer is an important parameter characterizing the physical properties of the polymer. The effect of pH on the molecular weight of poly-3-hydroxybutyric acid (PHB) produced by Alcaligenes sp. K-912 were investigated. PHB having higher molecular weight was obtained when cultivated under high pH conditions compared to the results cultivated under low pH conditions. The polydispersity index was almost the same as 1.6. But the cell mass was decreased as the pH became higher. The molecular weight was mainly determined in the early cultivation period and molecular weight difference could be explained by calculating the number of polymer chains.

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Authors and Affiliations

  1. Department of Chemical Engineering, Seoul National University, 151-742, Seoul, Korea

    Sung Ho Yeom & Young Je Yoo

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  1. Sung Ho Yeom
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  2. Young Je Yoo
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Yeom, S.H., Yoo, Y.J. Effect of pH on the molecular weight of poly-3-hydroxybutyric acid produced by Alcaligenes sp. . Biotechnol Lett 17, 389–394 (1995). https://doi.org/10.1007/BF00130795

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  • DOI: https://doi.org/10.1007/BF00130795

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