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Kim, Young Sook,Lee, Youngseop,Kim, Junghyun,Sohn, Eunjin,Kim, Chan Sik,Lee, Yun Mi,Jo, Kyuhyung,Shin, Sodam,Song, Yoojin,Kim, Joo Hwan,Kim, Jin Sook Hindawi Publishing Corporation 2012 Evidence-based Complementary and Alternative Medic Vol.2012 No.-
<P>To identify effective herb to treat obesity, we screened 115 herbal extracts for inhibition of porcine pancreatic lipase (triacylg-ycerol acylhydrolase, EC 3.1.1.3) activity <I>in vitro</I>. Of the extracts tested, <I>Cudrania tricuspidata</I> leaves exhibited the most pronounced inhibitory effect on lipase activity with an IC<SUB>50</SUB> value of 9.91 <I><I>μ</I></I>g/mL. Antilipid absorption effects of <I>C. tricuspidata</I> leaves were examined in rats after oral administration of lipid emulsions containing 50 or 250 mg <I>C. tricuspidata</I>/kg body weight. Plasma triacylglycerol levels 2 h after the oral administration of emulsions containing <I>C. tricuspidata</I> were significantly reduced compared to the untreated group (<I>P</I> < 0.05). These results suggest that <I>C. tricuspidata</I> leaves may be useful for the treatment of obesity.</P>
Improvement of Glaze Hardness in Commercial Bone China
Kim, Hyeong-Jun,Han, Yoon Soo,Kim, Dong-Hwan,Kim, Da-Mi,Choi, Jae-Ho,Lee, Sung-Min,Kim, Yoojin,Kim, Hyung-Tae The Korean Ceramic Society 2015 한국세라믹학회지 Vol.52 No.6
In order to improve the hardness of commercial bone china, we attempted to control the glost firing temperature and apply a chemical strengthening process. When the glost firing time was longer or its temperature was higher than normal conditions, the hardness was improved by approximately 5%. The chemical strengthening process also enhanced the hardness of the glaze by more than 13% compared with bone china. It is believed that the enhancement of the hardness of the glaze was related to the development of residual compressive stress in the glaze due to 1) the increase in the calcium phosphate phase in the interface layer between the body and the glaze after firing, and 2) the increase of the $K^+$ concentration on the glaze surface during the chemical strengthening process.
Kim, Tae-Yang,Park, Sunhwa,Yoon, Younggun,Lee, Ji-Hoon,Jeon, Jeongsuk,Kim, Mi Sug,Kim, Yoojin,Kim, Min Gyu,Hur, Hor-Gil American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.7
<P>Ferrihydrite, or iron(III) (oxyhydr)oxide (Fe(OH)<SUB>3</SUB>), a representative scavenger of environmentally relevant toxic elements, has been repurposed as a low-cost and scalable precursor of well-developed hematite (α-Fe<SUB>2</SUB>O<SUB>3</SUB>) secondary nanoclusters with a hierarchically structured morphology for lithium-ion anode materials. Here, we report that the bacteria <I>Clostridium</I> sp. C8, isolated from a methane-gas-producing consortium, can synthesize self-assembled secondary hematite nanoclusters (∼150 nm) composed of small nanoparticles (∼15 nm) through the molecular structural rearrangement of amorphous ferrihydrite under mild conditions. The biogenic hematite particles, wrapped with graphene oxide reduced in situ by the reducing bacteria <I>Shewanella</I> sp. HN-41 via one-pot synthesis, deliver an excellent reversible capacity of ∼1000 mA h g<SUP>-1</SUP> after 100 cycles at a current density of 1 A g<SUP>-1</SUP>. Furthermore, the heat-treated hematite/rGO exhibits a capacity of 820 mA h g<SUP>-1</SUP> at a high current density of 5 A g<SUP>-1</SUP> and a reversible capacity of up to 1635 mA h g<SUP>-1</SUP> at a current density of 100 mA g<SUP>-1</SUP>. This study provides an easy, eco-efficient, and scalable microbiological synthetic route to produce hierarchical hematite/rGO secondary nanoclusters with potential as high-performance Li-ion anode materials.</P> [FIG OMISSION]</BR>
Gwanghee Kim,Yoojin Lee,Jin Sun You,Wontae Hwang,Jeewon Hwang,Hwa Young Kim,Jieun Kim,Ara Jo,In ho Park,Mohammed Ali,Jongsun Kim,Jeon-Soo Shin,Ho-Keun Kwon,Hyun Jik Kim,Sang Sun Yoon 대한면역학회 2023 Immune Network Vol.23 No.4
Evidence suggests that the human respiratory tract, as with the gastrointestinal tract, has evolved to its current state in association with commensal microbes. However, little is known about how the airway microbiome affects the development of airway immune system. Here, we uncover a previously unidentified mode of interaction between host airway immunity and a unique strain (AIT01) of Staphylococcus epidermidis, a predominant species of the nasal microbiome. Intranasal administration of AIT01 increased the population of neutrophils and monocytes in mouse lungs. The recruitment of these immune cells resulted in the protection of the murine host against infection by Pseudomonas aeruginosa, a pathogenic bacterium. Interestingly, an AIT01-secreted protein identified as GAPDH, a well-known bacterial moonlighting protein, mediated this protective effect. Intranasal delivery of the purified GAPDH conferred significant resistance against other Gram-negative pathogens (Klebsiella pneumoniae and Acinetobacter baumannii) and influenza A virus. Our findings demonstrate the potential of a native nasal microbe and its secretory protein to enhance innate immune defense against airway infections. These results offer a promising preventive measure, particularly relevant in the context of global pandemics.
Investigation of the Electronic Structure of Mn12 Molecular Magnet Using Synchrotron Radiation
J.-S. Kang,J. H. Kim,YooJin Kim,WonSuk Jeon,Duk-Young Jung,S. W. Han,K. H. Kim,K. J. Kim,B. S. Kim,J. H. Shim,B. I. Min 한국자기학회 2003 Journal of Magnetics Vol.8 No.4
The electronic structure of Mn12-Ac molecular magnet has been investigated using synchrotron radiation. The valence-band photoemission spectroscopy (PES) measurement reveals that Mn 3d states are located near the top of the valence band. The trend in the measured valence-band PES spectra is found to be consistent with that in the calculated local density of states. The Mn 2p x-ray absorption spectroscopy (XAS) measurement provides evidence for the Mn³ +-Mn⁴+ mixed-valent states.