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박중곤,김준균 ( Joong Kon Park,Joon Kyun Kim ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.2
Mixed organic solvent was used as a medium instead of buffer solution in the new developed filter paper electrophoresis cell. The sample protein solution was prepared as the micro-aqueous system and the protein of the sample protein solution migrated at the high electrical voltage of 7 kilo volts applied between two electrodes. We could select usable protic organic solvents by measuring the electrical conductivities of organic solvents and checking the stability of the sample protein solution. The protein of the sample protein solution moved lump by lump. The direction of the protein movement was reverse and the migration speed was more than 100 times faster than that of conventional electrophoresis system.
정수환,박중곤,장호남 ( Soo Hwan Cheong,Joong Kon Park,Ho Nam Chang ) 한국화학공학회 1993 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.31 No.6
An encapsulation method in which yeast cells were immobilized in calcium alginate capsule was investigated. The calcium alginate capsule could burst because of carbon dioxide gas produced during ethanol fermentation. A new method for preparing calcium alginate microcapsules was developed and it was observed that gas transfer was further facilitated about two times as fast as in conventional capsule membrane. By adding a small amount of calcium chloride in the medium it was possible to control the swelling of the microcapsules and increase the dry cell density to 310 g/ℓ. The rate of ethanol production of the system was nearly the same as that of bead system in continuous operation. For the calcium alginate capsule without adding surfactant, it was possible to increase the gas transfer rate about 20 times by lowering the dry cell density of the capsule to about 74 g/ℓ. This was possible because of thin wall thickness and expanded surface area of the capsule.