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Entrapment of immobilised in situ intracellular lipase of Mucor in microporous capsules

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Antczak T., Bugla J., Mastalerz M., Niemiec A., Szeja W., Slek M., Galas E.
Biotechnologia
|
2000
|
issue 4
142-151
EN
Lipases Mucor circinelloides and Mucor racemosus immobilised in situ were closed in microporous polysacharides hydrophilic gel cross-linked using a solution of calcium salts. In order to increase the porosity of polysacharides matrix during its cross-linking oligomer molecules of ethylene oxide (optimal Polikol 1000) were incorporated in the structure of the matrix. Then the oligomer was removed by acetone extraction. The obtained biocatalyst preparations were tested in hydrolysis of esters and esterification of oleic acid with butanol. The hydrolysis was carried out in water saturated organic solvents medium (n-hexane and diisopropylether). It was found that the efficiency of M. racemosus lipase immobilisation in hydrolysis of n-butyl oleate, n-butyl palmitate, n-butyl stearate, n-butyl laurate amounted to 60%. The efficiency of M. circinelloides lipase immobilisation in esterification of oleic acid with 1-butanol in hexane achieved 45%.
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