Chung Hae Park

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Continuous permeabilization of preconditioned Coleus blumei cells with dimethyl sulfoxide (DMSO) is shown to be an effective strategy for the enhanced release of rosmarinic acid (RA) while preserving cell viability. When nonpreconditioned cells were permeabilized with DMSO, they lost their viability at DMSO concentrations higher than a critical value(More)
Acetone-butanol-ethanol (ABE) fermentation was successfully carried out in an immobilized cell trickle bed reactor. The reactor was composed of two serial columns packed with Clostridium acetobutylicum ATCC 824 entrapped on the surface of natural sponge segments at a cell loading in the range of 2.03-5.56 g dry cells/g sponge. The average cell loading was(More)
Extractive acetone-butanol-ethanol (ABE) fermentation was carried out successfully using pervaporation and a low-acid-producing Clostridium acetobutylicum B18. A pervaporation module with 0.17 m(2) of surface area was made of silicone membrane of 240 mum thickness. Pervaporation experiments using make-up solutions showed that butanol and acetone fluxes(More)
Somatic embryogenesis and plant regeneration of Canada wildrye (Elymus canadensis L.) from tissue culture was investigated by culturing immature embryos and inflorescences on MS medium containing 2 mg/l 2,4-D. The optimum size of explants for maximum embryogenic callus formation was 1.0 to 1.5 mm for embryos and 4 to 6 cm for inflorescences. Plant(More)
An alcohol utilizing Alcaligenes eutrophus produced poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) copolymer under phosphate limitation. Fermentation was performed for 42-46 h in a computer-controlled 5-L working volume fed-batch fermentor using ethanol and propanol as carbon sources. The culture experienced phosphate limitation in approximately 19 h.(More)
Acetone-butanol-ethanol (ABE) fermentation was performed continuously in an immobilized cell, trickle bed reactor for 54 days without, degeneration by maintaining the pH above 4.3. Column clogging was minimized by structured packing of immobilization matrix. The reactor contained two serial glass columns packed with Clostridium acetobutylicum adsorbed on(More)
Fifty four hybrid plants between Elymus canadensis and Psathyrostachys juncea were obtained by handpollination and embryo culture. The average cross compatibility between both species was 31.2 percent. One amphiploid plant was induced by colchicine treatment. The hybrid and amphiploid plants resembled P. juncea in appearance but showed a higher plant height(More)
We propose modeling and simulation of the void formation and the tow saturation in liquid composite molding processes. The present model addresses the void formations in the macropore between fiber tows as well as in the micropore inside fiber tows. We also consider the bubble compression and tow saturation after voids are formed at the flow front. Finally,(More)
Intergeneric hybrids recovered through plant regeneration from embryo callus culture and their colchicine-induced amphiploids were obtained from a cross of Elymus canadensis with Secale cereale (cv ‘Gazeller’). The embryo-callus-regenerated F1 plants grew vigorously to maturity and regrew well after clipping, while the embryo-rescued F1 died of hybrid(More)
Citation: Park CH and Krawczak P (2015) Unsaturated and saturated permeabilities of fiber reinforcement: critics and suggestions. In general, permeability measurement results show a strong scattering according to the measurement method, the type of test fluid and the fluid injection condition, even though permeability is regarded as a unique property of(More)
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