A5110176633- High-Temperature Coating Behaviors
- Materials Engineering and Processing
- Bacteriophages and microbial interactions
- Probiotics and Fermented Foods
- Advanced ceramic materials synthesis
- Advanced materials and composites
- Material Properties and Applications
- Plant biochemistry and biosynthesis
- Food Quality and Safety Studies
- Influenza Virus Research Studies
- Microwave Dielectric Ceramics Synthesis
- Tribology and Wear Analysis
- Mesoporous Materials and Catalysis
- Diabetes and associated disorders
- Parasites and Host Interactions
- Semiconductor materials and devices
- Ecology and Conservation Studies
- X-ray Diffraction in Crystallography
- Conducting polymers and applications
- Diabetes Management and Research
- Antimicrobial Peptides and Activities
- Insect-Plant Interactions and Control
- Brake Systems and Friction Analysis
- Superconductivity in MgB2 and Alloys
- Catalytic Cross-Coupling Reactions
International Vaccine Institute
2024
University of Hong Kong
2019
Dae Hwa Pharm (South Korea)
2018
Ajou University
2003-2016
Biotechnology Research Center
2010
The University of Tokyo
2007-2010
Seoul National University
1989-1991
Rice diterpenoid phytoalexins such as momilactones and phytocassanes are produced in suspension-cultured rice cells treated with a chitin oligosaccharide elicitor leaves irradiated UV light. The common substrate geranylgeranyl diphosphate is converted into diterpene hydrocarbon precursors via two-step sequential cyclization then the bioactive several oxidation steps. It has been suggested that microsomal cytochrome P-450 monooxygenases (P-450s) involved downstream of hydrocarbons leading to...
The production of phytoalexins is a well-documented defense response against pathogen infection in rice. Although jasmonic acid has been suggested to be involved the both suspension-cultured rice cells and leaves, there almost no information on other secondary signaling molecules that regulate In this study, major diterpenoid phytoalexins, momilactones phytocassanes, was found induced by cytokinin treatment also upregulation phytoalexin biosynthetic genes treatment. roles cytokinins infected...
A very high tunable inter-digital capacitor (IDC) using the bismuth zinc niobate (BZN) pyrochlore thin-film dielectrics is presented for microwave applications. To increase tunability of IDC and reduce DC bias voltage, its electrodes are fully embedded into BZN dielectrics. At 20 V applied, yields 72 75% at 2.4 5.8 GHz, respectively.
The powder morphology (shape and size) of feedstock has a very important role in metal coatings when applied using the cold gas dynamic spray process. In this study, spraying dendritic Cu powders was investigated. hydrodynamic processes involved are complicated to simulate. Compared particles ideal spherical shape, fragmentation irregularly shaped is more severe, size distribution profiles continuously change turbulent stream before arrive at substrates. Thus, theoretical effects particle on...
We have extracted Codium fragile in two ways : hot water extraction and alcohol extraction. also dried fruit of chinese quince (Chaenomeles sinensis) with water. Antimicrobial activities Chaenomeles sinensis extracts were investigated using paper disc method continuous sequential dilution respectively. Total phenol flavonoid contents measured. As a result, showed high antimicrobial activity did not affect beneficial intestinal microorganisms. In addition, activity. These results suggest that...
In this study, antioxidation and anti-inflammatory activity Agaricus Brazei (AC) extract were examined. Antioxidation was increased as the concentration of AC (Concentration-dependant manner). The contents phenolic compounds flavonoids 111.3019 mg/g 15.473 mg/g, respectively. effect test using extract, no toxicity shown. NO production inhibited in range 50 to 100 μg/mL dependant manner. PGE₂ Proinflammatory cytokines IL-6 decreased However, TNF-α not changed compare control. iNOS COX-2...
YSZ films have been widely used as buffer layers for high T/sub c/ superconductor. However, it is necessary to investigate and develop another layer with suitable, simple, neat processing. Films of Ce-Zr mixed oxide were deposited by rf dc magnetron co-sputtering. In sputtering process, power Zr was fixed in 200 W while Ce varied 30 W, 50 100 respectively. As-deposited (Ce/sub x/Zr/sub 1-x/)O/sub 2/ crystallized without post annealing. It confirmed that the composition could be controlled...
Abstract This work investigates the effect of feedstock size on hardness and wear resistance metal-matrix composite coatings produced by cold spraying. Feedstocks consisting Al Al2O3 powders were prepared for study. The feedstocks, which differ in regard to particle (100, 50, 10 µm) composition (25-50 vol%), accelerated compressed air through a Delaval-type nozzle positioned mm from target substrate. morphology coating resembled that an matrix with embedded particles. Optical microscopy...
Abstract This study investigates the effects of various reinforcement materials and solid lubricants on cold spray aluminum composite coatings. The wear resistance friction coefficient coatings were very different with without a lubricant. It was found that Al2O3 greatly improves properties, Mo results in better dispersion hardening, MoS2 reduces coefficient.
Abstract It is well known that the inlet temperature of spray gas influences impact velocity particles which, in turn, affects mechanical and chemical properties final coating. From cold high- and-low-melting-point feedstock such as Cu-Sn, it was found those effects can vary with changes particle shape size. Copper powder feedstocks different shapes, dendritic (under 25 μm), were selected for analysis. For spherical 10 μm) powders Cu6Sn5, an intermetallic compound (IMC) Cu-Sn formed...
Palladium(II) acetate immobilized on N,N-diethylaminopropyl amorphous alumina (NDEAP-Al2O3-Pd(OAc)2) was synthesized and found to promote the Suzuki-Miyaura cross-coupling reaction. Thus, reaction of Pd(OAc)2 in THF followed by evaporation dryness gave NDEAP-Al2O3-Pd(OAc)2 (Pd/alumina = 0.025 mol/g). The coupling aryl halides with arylboronic acids carried out presence (20 mol% Pd) H2O-EtOH give corresponding biaryls high yield (17 examples, 74-100% yield).