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New Cerebrosides from a Marine Sponge <i>Haliclona</i> (<i>Reniera</i>) sp.
Park, Taeseong,Mansoor, Tayyab Ahmad,Shinde, Pramod Bapurao,Bao, Baoquan,Hong, Jongki,Jung, Jee Hyung The Pharmaceutical Society of Japan 2009 Chemical & pharmaceutical bulletin Vol.57 No.1
<P>A chemical investigation of the MeOH extract of a marine sponge <I>Haliclona</I> (<I>Reniera</I>) sp., collected off the coast of Ulleung Island, Korea, led to the isolation of thirteen new cerebrosides (1—3, 5—14), along with a known analogue (4). Their structures were elucidated on the basis of 1D and 2D NMR spectroscopy, MS spectrometry, and chemical method. The major new features of these glucocerebrosides are C<SUB>15</SUB> and C<SUB>19</SUB> acyl chains, long (C<SUB>24</SUB>–C<SUB>28</SUB>) acyl chains, or the <I>S</I>-configuration of the acyl chains. It is noteworthy that both <I>R</I>- and <I>S</I>-configurations of the acyl chains were observed in the same specimen.</P>
Long-term catalytic durability in Z-scheme CdS@ 1T-WS2 heterojunction materials
Taeseong Kim,Hyerim Park,Byung Hyun Park,Seog Joon Yoon,유춘리,Sang Woo Joo,손남규,Misook Kang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.105 No.-
This study aimed to improve the long-term durability of CdS catalysts by reducing the deterioration ofcatalytic activity caused by photocorrosion. An ultrathin 1T-WS2 2D nanosheet was introduced to enclosethe CdS nanorods. The crystal defects in the wrapped CdS particles were reduced, and the WS2 sheetbecame thinner in the junction particle. The 2CdS@1WS2 junction particle exhibited the slowest decaytime of the photoluminescence curve, and the photocurrent density increased by more than 3.5-fold inthe junction particle than the single CdS particle. Eventually, the optimized 2CdS@1WS2 catalyst exhibiteda high rate of H2 production of 3935 lmol g 1h 1 under simulated solar light irradiation with aquantum efficiency of 50%. Although the recycling experiment was repeated over 10 times using the2CdS@1WS2 junction particle, the produced hydrogen amount did not decrease. This result is becauseCdS nanorods wrapped stably by the ultrathin WS2 nanosheets, which suppressed the photocorrosionof CdS, and furthermore, the 1T phase WS2 rapidly attracted photogenerated electrons from CdS, facilitatingcharge separation and inhibiting their recombination, thereby improving the catalyst activity. Finally,it was revealed that an effective Z-scheme charge transfer mechanism in the CdS@1T-WS2 junction particlefollows during water splitting.
Park, Taeseong,Park, Young Seung,Rho, Jung‐,Rae,Kim, Young Hwan John Wiley Sons, Ltd. 2011 Rapid communications in mass spectrometry Vol.25 No.5
<P><B>Abstract</B></P><P>Six cerebrosides were isolated from the eggs of the starfish <I>Asterias amurensis</I> using solvent extraction, silica gel column chromatography, and reversed‐phase high‐performance liquid chromatography. This study demonstrated that the structures of cerebrosides could be completely characterized, based on their sodium‐adducted molecules, using fast atom bombardment (FAB) tandem mass spectrometry. The high‐energy collision‐induced dissociation of the sodium‐adducted molecule, [M + Na]<SUP>+</SUP>, of each cerebroside molecular species generated abundant ions, providing information on the compositions of the 2‐hydroxy fatty acids and long‐chain sphingoid bases, as well as the sugar moiety polar head group. Each homologous ion series along the fatty acid and aliphatic chain of the sphingoid base was useful for locating the double‐bond positions of both chains and the methyl branching position of the long‐chain base. The <I>N</I>‐fatty acyl portions were primarily long‐chain saturated or monoenoic acids (C16 to C24) with an α‐hydroxy group. The sphingoid long‐chain base portions were aliphatic chains (C18 or C22) with two or three degrees of unsaturation and with or without methyl branching. Copyright © 2011 John Wiley & Sons, Ltd.</P>
Taeseong Jeong,Eunbyul Cho,Sungha Kim,Seunghyun Oh,Suhak Kim,Jeongsu Park,Sungchul Kim Korean AcupunctureMoxibustion Medicine Society 2024 대한침구의학회지 Vol.41 No.2
The use of ultrasound (US)-guided interventions has rapidly increased in Korean medicine (KM) to ensure the safety and accuracy of invasive procedures, such as pharmacopuncture and acupotomy. Although hands-on training is important for the acquisition of skills, it requires considerable time and cost. A detailed guide on the procedure and treatment regions is needed to ensure hygiene and safety during US-guided procedures in KM practice. In this study, we present the overall procedure, target structures, and treatment approaches of US-guided pharmacopuncture and acupotomy for nerve entrapment in the upper extremities of the cubital and radial tunnel, posterior interosseous nerve, carpal tunnel, and Guyon's canal syndrome. We believe that the findings of our study will serve as a foundation for future clinical research, practice, and education on US-guided KM procedures. Further research involving US-guided interventions should specify target structures in three-dimension to delineate the treatment areas.
( Taeseong Han ),( Younghyun Gwon ),( Sunho Park ),( Yubin Jeon ),( Hyoseong Kim ),( Jangho Kim ) 한국농업기계학회 2020 한국농업기계학회 학술발표논문집 Vol.25 No.2
Nanoscale manufacturing has enabled the development of smart packaging systems for the functional and convenient distribution of food products, overcoming the major bottlenecks to the future fabrication of stable, safe, economically feasible, and environmentally friendly food packaging systems. For example, nanotechnology can provide more functions of packaging systems to maintain, preserve, and sustain food products. In this work, we proposed a national design of biodegradable packaging nanoporous films (PNFs) to improve food quality preservation using polycaprolactone (PCL), biodegradable polymer, in combination with the nanofabrication technique. As a model study, we stored tomatoes with PCL PNFs in room and refrigerated temperature, respectively. Compared to conventional packaging films (i.e., polystyrene films), the PCL PNFs could retain the intact appearances of tomatoes. We also showed the higher mechanical property of tomatoes stored with the PCL PNFs than that of tomatoes with conventional packaging films, suggesting that the PCL PNFs could maintain food quality owing to probably the unique nanopore properties. We believe that biodegradable nanoporous films may be used as a new strategy to design smart food packaging systems for improving food quality preservation.
Kim, Taeseong,Hong, Jang-Kwan,Oem, Jae-Ku,Lee, Kwang-Nyeong,Lee, Hyang-Sim,Kim, Yong Joo,Ryoo, Soyoon,Ko, Young-Joon,Park, Jong-Hyeon,Choi, Jida,Lee, Seung Heon,Jo, Hye Jun,Lee, Myoung-Heon,Kim, Byoun Elsevier 2019 Vaccine Vol.37 No.12
<P><B>Abstract</B></P> <P>After massive foot-and-mouth disease (FMD) outbreaks originated from Jincheon County from Dec. 2014 to Apr. 2015, the effectiveness of the previous FMD vaccine containing only the O1 Manisa as the O antigen, O1 Manisa + A Malaysia 97 + Asia 1 Sharmir trivalent vaccine, was questioned in South Korea, and a change in the O antigen in FMD vaccines was demanded to control the FMD caused by FMDV O/Jincheon/SKR/2014, the O Jincheon strain. Therefore, the efficacies of O1 Manisa + O 3039 bivalent vaccine and O 3039 monovalent vaccine were studied for cross-protection against heterologous challenge with the O Jincheon strain. In this study, the efficacy of the O1 Manisa + O 3039 bivalent vaccine was better than that of the O 3039 monovalent vaccine, even though the serological relationship (r<SUB>1</SUB> value) between O Jincheon and O 3039 was matched according to the OIE Terrestrial Manual. According to serological test results from vaccinated specific pathogen free pigs, virus neutralization test titers against Jincheon were good estimates for predicting protection against challenge. A field trial of the O1 Manisa + O 3039 bivalent vaccine was performed to estimate the possibility of field application in conventional pig farms, especially due to concerns about the effect of maternally derived antibodies (MDA) in field application of the FMD vaccine. According to the result of the field trial, the O1 Manisa + O 3039 bivalent vaccine was considered to overcome MDA. The results of the efficacy and field trials indicated that the O1 Manisa + O3039 vaccine could be suitable to replace previous FMD vaccines to control the FMD field situation caused by O Jincheon FMDV.</P>
Flexible and Biodegradable Nanoporous Films for Application in Active Food Packaging Systems
( Woochan Kim ),( Taeseong Han ),( Yonghyun Gwon ),( Sunho Park ),( Hyoseong Kim ),( Jangho Kim ) 한국농업기계학회 2023 한국농업기계학회 학술발표논문집 Vol.28 No.1
Nanotechnology has facilitated the development of active food packaging systems with functions that could not be achieved by their traditional counterparts. Such smart and active systems can improve the shelf life of perishable products and overcome major bottlenecks associated with the fabrication of safe and environmentally friendly food packaging systems. Herein, we used a plasma-enabled surface modification strategy to fabricate biodegradable and flexible nanoporous polycaprolactone-based (FNP) films for food packaging systems. Their capacity for preserving tomatoes, tangerines, and bananas at room and refrigeration temperatures was tested by analyzing various fruit parameters (mold generation, appearance changes, freshness, weight loss, firmness, and total soluble solids contents). Compared with commonly used polyethylene terephthalate-based containers, the proposed system enhanced the fruit storage quality (i.e., retained appearance, reduced weight loss, better firmness, and sugar contents) by controlling moisture evaporation and inhibiting mold generation. Thus, the FNP film represents a new active food packaging strategy.
Analysis of Phosphatidylinositol 3,4,5-Trisphosphates of PTEN Expression on Mammalian Cells
Jahan, Nusrat,Park, Taeseong,Kim, Young Hwan,Lee, Dongsun,Kim, Hackyoung,Noh, Kwangmo,Kim, Young Jun Korean Society for Mass Spectrometry 2013 Mass spectrometry letters Vol.4 No.3
The goal of this study is to find an experimental condition which enables us to perform enzymatic studies on the cellular behavior of PTEN (phosphatase and tensine homolog) through identification of molecular species of phosphatidylinositol 3,4,5-trisphosphates and their quantitative analysis in a mammalian cell line using mass spectrometry. We initially exployed a two-step extraction process using HCl for extraction of phosphatidylinositol 3,4,5-trisphosphates from two mammalian cell lines and further analyzed the extracted phosphatidylinositol 3,4,5-trisphosphates using tandem mass spectrometry for the identification of them. We finally quantified the concentration of phosphatidylinositol 3,4,5-trisphosphates using internal standard calibration. From these observation, we found that HEK 293-T cells is a good model to examine the enzymatic behavior of PTEN in a cell, and the minimum amount of phosphatidylinositol 3,4,5-trisphosphates is more than 50 pmol for quantification in a mass spectrometer. These results suggest that the well-optimized experimental conditions are required for the investigation of the cellular PTEN in terms of the catalytic mechanism and further for the detailed identification of cellular substrates.