alexa Abstract | Comparison and suitability of gel matrix for entrapping higher content of enzymes for commercial applications

Indian Journal of Pharmaceutical Sciences
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Research Paper Open Access

Abstract

To check the suitability of enzyme entrapped beads for use in pharmaceutical industry, amylase enzyme was entrapped in agar/agarose, polyacrylamide gels and calcium alginate beads. Sodium alginate of 1% concentration was found to be best with respect to immobilization efficiency and calcium alginate beads so obtained were not much susceptible to breakage. When sodium alginate- amylase mixture was added from a height of about 20-30 cm. into CaCl 2 solution, size of beads was large at higher alginate concentration due to the increase in the size of droplet formation before entering into CaCl 2 solution. Enzyme entrapped polyacrylamide and agar/agarose gels were fragile and could not withstand repeated use whereas enzyme entrapped in large calcium alginate beads was used successfully for 50 cycles for the conversion of starch into product without much damage to the beads under stirring conditions. Amylase preparation was also mixed with urease, lysozyme and coimmobilized in large sized calcium alginate beads. These beads were used for 10 repeated cycles to check the conversion of substrates into their products by their respective enzymes and we concluded that an enzyme or mixture of two or three enzymes can be immobilized in the same large sized calcium alginate beads. This will save the additional cost of bioreactor, manpower, maintenance conditions required for the conversion of one drug into another using enzyme/s entrapped in large sized beads.

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Author(s): R Mahajan VK Gupta J Sharma

Keywords

Agar/agarose gel, calcium alginate, entrapment, enzyme, immobilization, polyacrylamide

 
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