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Starter 및 멸치액젓 첨가가 김치양념 및 겉절이 김치의 품질에 미치는 영향
최택권,박소희,유진현,임호수,조재선,황성연 한국식생활문화학회 2003 韓國食生活文化學會誌 Vol.18 No.2
양념에 Leu. mesenteroides, Lac plantarum의 젖산균과 멸치액젓 첨가가 김치 양념의 대장균군 제어, 속성촉진여부 및 관능적 특성에 미치는 영향을 조사하였다. Leu. mesenteroides과 젓갈을 첨가한 경우 초기 숙성이 촉진되나 후기 산패는 완만하였으며 Lac. plantarum의 첨가시에는 초기 숙성에는 큰 차이가 없고 후기 산패가 현저하게 진행되었다. 대장균군은 산도 0.80% 이상에서 사멸되었는데 leu. mesenteroides의 경우가 숙성이 촉진되어 보다 신속히 사멸시켰다. 총균수와 젖산균수는 초기에 starter 첨가구는 10^6CFU/mL 정도인데 반해서 starter를 첨가하지 않은 않은 처리구에서 총균수는 10^6CFU/mL , 젖산균수가 10^4CFU/mL 이었고 숙성 후에는 첨가균이 높은 수준을 유지하였다. 하지만 대체적으로 스타터의 첨가가 숙성 및 대장균에 크게 영향을 주지 못하는 경향으로 동일하게 나왔다. 관능적 특성에서는 Leu. mesenteroides 첨가구가 Lac. plantarum의 경우보다 우수하였다. 한편, 시판 겉절이 김치는 산도가 0.09~0.18%, ph 5.46~5.89, 총균수 2.2×10^6~3.1×10^7CFU/mL, 젖산균수는 2.1×10^4~6.6×10^5CFU/mL, 대장균수는 1.8×10^4~7.1×10^5CFU/mL, 염분 1.89%~2.51%으로 스타터 첨가 겉절이에 비해 ph와 염도를 제외한 품질 특성에서 전반적으로 낮은 값을 나타냈다. This study was performed in order to investigate the effect of Leuconostoc mesenteroides, Lactobacillus plantarum and salt fermented anchovy extracts on Kimchi sauce. The sauce was fermented more rapidly by addition of Leu. mesenteroids or salt fermented anchovy extracts on the early fermentation stage than the control, but it was fermented slowly on the late fermentation stage. When L. plantarum was added to the Kimchi on the early fermentation stage, the acidity of Kimchi didn't show a significant difference from the control, but acidity was remarkably increased on the late stage. Coliform group was disappeared when acidity of sauce was higher than 0.8% during fermentation. It was controlled by Leu. mesenteroides but not by L. plantarum. Total count and lactic acid bacterial count of the sauces with starter were 6.30×10^6~1.0×10^7 CFU/mL and 1.04~2.04×10^6 CFU/mL, respectively, but those of the control sauce were 10^6 CFU/mL and 10^4 CFU/mL, respectively. Those count of the sauce with starter were higher than those of the control sauce on the later stage of fermentation. Organoleptic quality of the sauce with Leu. mesenteroides was superior to that with L. plantarum.
황하수,이민영,임권택 釜慶大學校 2001 釜慶大學校 論文集 Vol.6 No.-
Block copolymers containing dimethy siloxane and 2-hydroxyethyl methacrylate sequences were synthesized by group transfer polymerization (GTP) of 2- trimethylsilyloxy ethyl methacrylate(TMS-EMA) using silyl ketene acetal terminated poly(dimethylsiloxane) (PDMS) as macroinitiator, followed by hydrolysis of TMS-EMA to HEMA. The block copolymers were obtained with controlled molecular weight and narrow molecular weight distribution. Trimethylsilyl groups in the P(TMS-EMA) block could be selectively hydrolyzed without interfering with Si-O bond in PDMS block. The block copolymers formed micelles in methanol, the effective diameters (Rh) of which were in the range of 78 ~110 nm with narrow distribution by dynamic light scattering (DLS). The latex particles, PMMA was synthesized by dispersion polymerization in supercritical carbon dioxide with these block copolymers as stabilizer.
Novel Semiconducting Polymer Particles by Supercritical Fluid Process
Lim, Kwon Taek,Subban, Ganapathy Hullathy,Hwang, Ha Soo,Kim, Jung Taek,Ju, Chang Sik,Johnston, Keith P. WILEY-VCH Verlag 2005 Macromolecular Rapid Communications Vol.26 No.22
<P>Summary: A simple method to prepare surfactant-free and solvent-free semiconducting polymer particles by using an environmentally benign supercritical carbon dioxide (scCO<SUB>2</SUB>) process is reported. The process of the rapid expansion of supercritical solutions (RESS) is used to produce spherical particles of poly[2-(3-thienyl)acetyl 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctanoate] (PSFTE), 50–500 nm in size, from 0.1–0.5 wt.-% PSFTE solutions in CO<SUB>2</SUB> at pre-expansion temperatures of 40 °C and pre-expansion pressures of 276 bar.</P><P> <img src='wiley_img/10221336-2005-26-22-MARC200500438-gra001.gif' alt='wiley_img/10221336-2005-26-22-MARC200500438-gra001'> Graphic An FESEM image of PSFTE particles produced by the RESS process with CO<SUB>2</SUB>. </P>
Comprehensive evaluation of carboxylated nanodiamond as a topical drug delivery system
Lim, Dae Gon,Kim, Ki Hyun,Kang, Eunah,Lim, Sun Hee,Ricci, Jeremy,Sung, Si Kwon,Kwon, Myoung Taek,Jeong, Seong Hoon Dove Medical Press 2016 INTERNATIONAL JOURNAL OF NANOMEDICINE Vol.11 No.-
<P>The best strategy in the development of topical drug delivery systems may be to facilitate the permeation of drugs without any harmful effects, while staying on the skin surface and maintaining stability of the system. Nanodiamonds (NDs) play a key role with their excellent physicochemical properties, including high biocompatibility, physical adsorption, reactive oxygen species (ROS) scavenging capability, and photostabilizing activity. <I>Z</I>-average sizes of carboxylated ND (ND–COOH) agglutinate decreased significantly as the pH increased. Fluorescein-conjugated ND was observed only on the stratum corneum, and no sample diffused into the dermal layer even after 48 hours. Moreover, ND–COOH and ND–COOH/eugenol complex did not show significant toxic effects on murine macrophage cells. ND improved in vitro skin permeation >50% acting as a “drug reservoir” to maintain a high drug concentration in the donor chamber, which was supported by quartz crystal microbalance results. Moreover, ND–COOH could adsorb a drug amount equivalent to 80% of its own weight. A photostability study showed that ND–COOH increased the photostability ~47% with regard to rate constant of the eugenol itself. A significant decrease in ROS was observed in the ND–COOH and ND–COOH/eugenol complex compared with the negative control during intracellular ROS assay. Moreover, ROS and cupric reducing antioxidant capacity evaluation showed that ND–COOH had synergistic effects of antioxidation with eugenol. Therefore, ND–COOH could be used as an excellent topical drug delivery system with improved permeability, higher stability, and minimized safety issue.</P>
임권택 ( Kwon Taek Lim ),허훈 ( Hoon Heo ) 한국화상학회 2015 한국화상학회지 Vol.21 No.3
Gloss values were measured for C, M, Y, and K color printed samples with a commercial glossmeter operated at fixed angles of 20, 60 and 85 degrees. The results were compared with maximum values and functional areas of BDRF obtained by using a gonio glossmeter. High degree gloss values showed better correlation with BDRF maximum height measurement though the values were very low for these uncoated printed samples. After fusing process with an iron of hight temperature for a second, 20 degree gloss values showed a similar trend to the BDRF maximum heights while 85 degree glosses were in the closest agreement with the BDRF areas.