이성호 교수

Abstract Removal of copper from a solution was investigated to evaluate the cation-exchange capacities of apple residues from agricultural wastes. The effects of solution pH, ionic strength, co-ion, ligands, initial metal concentrations, and particle size of apple residues were studied. The optimal pH range for copper removal by apple residues was shown to be from pH 5.5 to 7.0, and the maximum percentage of copper removal was 91.2%. Increasing ionic strength, up to 0.1 N, has little effect on m

Existing studies concerning the effects of marketing on firm performance have been conducted primarily in the areas of market‐orientation and marketing strategy studies. Recently, efforts have been made in investigating the integrated effects of these two factors on firm performance. As part of these efforts, this study employed market‐oriented culture and the marketing strategy‐making process of a firm as constituents of its marketing competence, and, based on reviews of related literature, dev

Cyclodextrin glucanotransferase from Bacillus stearothermophilus ET1 (CGTase ET1) is a potential antistaling enzyme with cyclodextrin (CD)-forming activity. To reduce cyclization activity of CGTase ET1, phenylalanine residues at 191 and 255 were replaced with a glycine (F191G-CGTase ET1) and an isoleucine (F255I-CGTase ET1), respectively. Temperature optima of both mutant enzymes were lower than that of the wild-type. Cyclization activities of both mutants decreased dramatically, but F255I-CGTas

TNF-alpha plays a variety of biological functions such as apoptosis, inflammation and immunity. PTEN also has various cellular function including cell growth, proliferation, migration and differentiation. Thus, possible relationships between the two molecules are suggested. TNF-alpha has been known to downregulate PTEN via NF-kappaB pathway in the human colon cell line, HT-29. However, here we show the opposite finding that TNF-alpha upregulates PTEN via activation of NF-kappaB in human leukemic

Thirteen cultivars of rice ( Oryza sativa ) were tested for plant regeneration from calli initiated from the scutella of mature seeds by water stress treatment using a high concentration of agarose, and examined for their response to Agrobacterium tumefaciens LBA4404, carrying a plasmid pTOK233, harboring genes for kanamycin resistance ( npt II), hygromycin resistance ( hpt ) and β ‐glucuronidase ( gus ). Plant regeneration frequency was considerably increased in most of the cultivars when the c

Lipopolysaccharide (LPS), an endotoxin, elicits strong immune responses in mammals. Several lines of evidence demonstrate that LPS challenge profoundly affects female reproductive function. For example, LPS exposure affects steroidogenesis and folliculogenesis, resulting in delayed puberty onset. The present study was conducted to clarify the mechanism underlying the adverse effect of LPS on the delayed puberty in female rats. LPS was daily injected for 5 days (50 μg/kg, PND 25-29) to treated an

Abstract Radioactive high-level liquid waste contains significant quantities of platinum group metals (PGM) such as palladium (Pd(II)), rhodium (Rh(III)) and ruthenium (Ru(III)). In this study, batch and column experiments were carried out to investigate the ion exchange characteristics of Pd(II) and Rh(III), including the effects of the ionic group of ion exchangers, solution temperature, and the concentration of nitric acid by various ion exchangers such as IRN 78 and Dowex 1x8. The elution ch