• 한국생물공학회:학술대회논문집
• /
• 2002.04a
• /
• pp.365-368
• /
• 2002

• Proceedings of the Korean Society of Life Science Conference
• /
• 2005.04a
• /
• pp.178-178
• /
• 2005

• Bulletin of the Korean Chemical Society
• /
• v.35 no.4
• /
• pp.1241-1243
• /
• 2014

• Rapid Communication in Photoscience
• /
• v.1 no.2
• /
• pp.42-42
• /
• 2012

• Bulletin of the Korean Chemical Society
• /
• v.24 no.5
• /
• pp.623-626
• /
• 2003

Nematophin and its analog incorporating tryptamine unit have been isolated and characterized from strain XRPC of a symbiotic bacterium Xenorhabdus nematophilus, which was newly isolated from Korean entomopathogenic nematodes. The stereoselective synthesis of these compounds was accomplished, and the relative configurations were determined. Nematophin exhibited potent antibacterial activities over several strains of methicillin-resistant S. aureus (MRSA) comparable to those of vancomycin.

• Proceedings of the Membrane Society of Korea Conference
• /
• 2005.11a
• /
• pp.231-233
• /
• 2005

• Bulletin of the Korean Chemical Society
• /
• v.35 no.6
• /
• pp.1601-1602
• /
• 2014

• Bulletin of the Korean Chemical Society
• /
• v.12 no.4
• /
• pp.358-359
• /
• 1991

• Korean Journal of Chemical Engineering
• /
• v.35 no.12
• /
• pp.2487-2495
• /
• 2018

Inspired by the specific amino acid sequence Asn-Pro-Ala (NPA) of water channel aquaporins (AQPs), we fabricated polyamide (PA) nanofiltration (NF) membranes by introducing reduced glutathione (GSH) in interfacial polymerization (IP) method. Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectrometry (XPS), scanning electron microscope (SEM), atomic force microscopy (AFM), zeta potential and static water contact angle measurement were employed to characterize the chemical composition, morphology, electronegativity and hydrophilicity of the NF membranes. The water flux of GSH/PIP-TMC NF membrane reached $32.00L\;m^{-2}h^{-1}$ at 0.2 MPa, which was approximately twice than that of pristine PIP-TMC NF membrane when the ratio of GHS to piperazidine (PIP) was 40% during IP process. More water channels were built as GSH was embedded into PA layer. The fabricated NF membranes also took on potent rejection for dyes and $Na_2SO_4$. This study presents a simple and facile method to simulate water channels-based biological materials which may find potential application in water treatment.

• Current Photovoltaic Research
• /
• v.5 no.3
• /
• pp.69-74
• /
• 2017

Here we report the influence of thermal treatment on the performance of high efficiency polymer solar cells with the bulk heterojunction films of poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b'] dithiophene-alt-3-fluorothieno[3,4-b]thiophene-2-carboxylate] (PTB7-Th) and [6,6]-phenyl $C_{71}$ butyric acid methyl ester ($PC_{71}BM$). The crystalline nanostructure of PTB7-Th:$PC_{71}BM$ layers, which were annealed at three different temperatures, was investigated by employing synchrotron radiation grazing incidence X-ray diffraction (GIXD) technique. Results showed that the device performance was slightly reduced by thermal annealing at $50^{\circ}C$ but became significantly poor by thermal annealing at $100^{\circ}C$. The poor device performance by thermal annealing was attributed to the collapse in the crystalline nanostructure of PTB7-Th in the PTB7-Th:$PC_{71}BM$ layers as evidenced by the GIXD measurements that exhibited huge reduction in the intensity of PTB7-Th (100) peak even at $50^{\circ}C$.