37 Result(s)
within
Yong Il Park
English
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Article
Biological safety and B cells activation effects of Zanthoxylum schinifolium
Zanthoxylum schinifolium has been used as culinary applications in Asia and some of its elements have been elucidated to have various pharmaceutical effects such as anti-platelet aggregat...
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Article
Properties of modified Nafion® membranes with heavy amount of (3-mercaptopropyl) trimethoxysilane prepared by long-term infiltration
Modified Nafion® membranes with a large amount of (3-mercaptopropyl) trimethoxysilane (MPTS) were fabricated by a long-term infiltration process. MPTS has been known as a strong surface modifier due to its abi...
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Article
Macromolecules isolated from Phellinus pini fruiting body: Chemical characterization and antiviral activity
Two major polymers, EP-AV1 and EP-AV2, were purified from the hot-water extract of the Porodaedalea pini (Brot.) Murrill (syn. Phellinus pini) fruiting body by 75% ethanol precipitation and size-exclusion chromat...
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Anticoagulating activities of low-molecular weight fuco-oligosaccharides prepared by enzymatic digestion of fucoidan from the sporophyll of Korean Undaria pinnatifida
In spite of their potential as biologically active compounds, the high molecular mass and viscous natures of fucoidans have hampered their applications especially as a therapeutic agent. Herein the fucoidan-de...
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Article
Novel hydrophobic coating process for gas diffusion layer in PEMFCs
The behavior of water and gas distribution in the gas diffusion layers (GDLs) of proton exchange membrane fuel cells (PEMFCs) were investigated analytically. In order to prevent the flooding phenomenon of the ...
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Article
Pathophysiological implication of ganglioside GM3 in early mouse embryonic development through apoptosis
Apoptosis may occur in early embryos where the execution of essential developmental events has failed, and gangliosides, sialic acid-conjugated glycosphingolipids, are proposed to regulate cell differentiation...
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Article
Bioconversion of compactin into pravastatin by Streptomyces sp.
Streptomyces sp. Y-110, isolated from soil, modified compactin to pravastatin, a therapeutic agent for hypercholesterolemia. In a batch culture, the highest production of pravastatin was 340 mg l−1 from 750 mg c...
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Article
Extracellular production of a glycolipid biosurfactant, mannosylerythritol lipid, from Candida antarctica
Candida antarctica (sp. SY16) required avegetable oil as the carbon source to produce a biosurfactant, mannosylerythritol lipid (MEL-SY16). Biosurfactant production was 31 g l−1 after 7 days in a batch culture a...
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Article
Effect of heating temperature on dielectric properties of Pb(Zr,Ti)O3 [PZT] fibers
Ferroelectric Pb(Zr0.53Ti0.47)O3 fibers were reproducibly fabricated by sol-gel technique using triethanolamine (TEA) complexed alkoxide. The phase transition from pyrochlore to perovskite took place about 400°C ...
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Article
Effect of composition on ferroelectric properties of sol-gel derived lead bismuth titanate (PbBi4Ti4O15) thin films
Bismuth layer-structured ferroelectric PbBi4Ti4O15(PBT) thin films were fabricated on Pt/Ti/SiO2/Si substrates by sol-gel spin coating and the effect of lead and bismuth concentration on phase transition, microst...
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Article
High proton conductivity in ZrP-PTFE composites
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Article
Proton conductivity in amorphous phosphate–PTFE composite
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Article
Expression of sfp gene and hydrocarbon degradation by Bacillus subtilis
Bacillus subtilis C9 produces a lipopeptide-type biosurfactant, surfactin, and rapidly degrades alkanes up to a chain length of C19. The nucleotide sequence of the sfp gene cloned from B. subtilis C9 was determi...
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Article
Fast Proton Conductors from Inorganic-Organic Composites: II. Amorphous Phosphate-PTFE and ZrP-PTFE Composites
A high proton-conductivity was observed in the composite of amorphous phosphate and polytetafluoroethylene (PTFE). Incorporation of amorphous phosphate into PTFE emulsion caused a large increase of conductivit...
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Article
Fast Proton Conductors from Inorganic-Organic Composites: I. Amorphous Phosphate-Nafion and Silicophosphate-PMA/PWA Hybrids
A drastic increase of electrical conductivity was observed in the composite of amorphous phosphate and ion-exchange resins (Nafion) as phosphorus concentration increased. Incorporation of amorphous phosphate i...
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Article
Monosaccharide compositions of Danaus plexippus (monarch butterfly) and Trichoplusia ni (cabbage looper) egg glycoproteins
Monosaccharide compositions of eggs from Danaus plexippus (monarch butterfly) and Trichoplusia ni (cabbage looper) were analyzed. Analyses were performed mainly with high performance anion exchange chromatogra...
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Article
Sialic acids inTrichoplusia ni andDanaus plexippus egg glycoproteins
Baculovirus expression vector insect cell system (BEVIS) is useful for high level production of human therapeutic proteins. However, it has been reported that recombinant glycoproteins produced from this syste...
