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약(葯)배양 기법 이용한 이탈리안 라이그라스 식물체 생산
김기용,강경민,최기준,임용우,장요순,성병렬,손대영,이병현,조진기 Plant molecular biology and biotechnology research 2002 Plant molecular biology and biotechnology research Vol.2002 No.-
We obtained regenerated Italian ryegrass (Lolium multiflorum Lam.) plants by anther culture. When Italian ryegrass anther was incubated for 20 days on callus induction medium, MS medium containing 30 g/ℓ of NAA and 1 mg/ℓ of kinetin its callus was induced. The ratio of callus induction was 9.2 %, the mean of callus weight was 8.6 mg/callus/anther. When Italian ryegrass callus was incubated for 50 days on plant regeneration medium, MS medium containing 30 g/ℓ of sucrose, 1 mg/ℓ of NAA and 2 mg/ℓ of kinetin, Italian ryegrass plant was regenerated. The ratio of plant regeneration was 26%.
김일수,성백섭,김인주,정영재,손준식 木浦大學校 應用科學硏究院 2001 應用科學硏究誌 Vol.1 No.-
The purpose of this study was to present the method to choose the optimization machining condition for the wire electric machine. This was completed by examining the ever-changing quality of the material and by improving the function of the wire electric discharge machine. Precision metal mold products and the unmanned wire electric discharge machining system were used and then applied in industrial fields. This experiment uses the wire electric discharge machine with brass wire electrode of 0.25mm. To measure the precision of the machining surface, average values are obtained from 3 samples of measures of center-line average roughness by using a third dimension gauge and a stylus surface roughness gauge.
Sung, Young Mo,Szyszko, Bartosz,Myś,liborski, Radomir,Stę,pień,, Marcin,Oh, Juwon,Son, Minjung,Latos-Graż,yń,ski, Lechosław,Kim, Dongho The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.61
<P>In a series of thiaaceneporphyrinoids, their conformers exhibit macrocyclic π-conjugation pathways controlled by a dihedral angle between the porphyrin framework and acene planes. Conformational equilibria significantly affect the photophysical properties of these macrocycles.</P> <P>Graphic Abstract</P><P>In a series of thiaaceneporphyrinoids, their conformers exhibit macrocyclic π-conjugation pathways controlled by a dihedral angle between the porphyrin framework and acene planes. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cc03855j'> </P>
An Improved Photovoltaic System Output Prediction Model under Limited Weather Information
Sung-Won Park,Sung-Yong Son,Changseob Kim,Kwang Y. LEE,Hye-Mi Hwang 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.5
The customer side operation is getting more complex in a smart grid environment because of the adoption of renewable resources. In performing energy management planning or scheduling, it is essential to forecast non-controllable resources accurately and robustly. The PV system is one of the common renewable energy resonrces in customer side. Its output depends on weather and physical characteristics of the PV system. Thus, weather information is essential to predict the amount of PV system output. However, weather forecast usually does not include enough solar irradiation information. In this study, a PV system power output prediction model (PPM) under limited weather information is proposed. In the proposed model, meteorological radiation model (MRM) is used to improve cloud cover radiation model (CRM) to consider the seasonal effect of the target region. The results of the proposed model are compared to the result of the conventional CRM prediction method on the PV generation obtained from a field test site. With the PPM, root mean square error (RMSE), and mean absolute error (MAE) are improved by 23.43% and 33.76%, respectively, compared to CRM for all days; while in clear days, they are improved by 53.36% and 62.90%, respectively.
Son, J. H.,Park, B. S.,Kim, I. R.,Sung, I. Y.,Cho, Y. C.,Kim, J. S.,Kim, Y. D. Springer Science + Business Media 2017 Lasers in medical science Vol.32 No.3
<P>Melatonin has anabolic effects on the bone, even under hypoxia, and laser irradiation has been shown to improve osteoblastic differentiation. The aim of this study was to investigate whether laser irradiation and melatonin would have synergistic effects on osteoblastic differentiation and mineralization under hypoxic conditions. MC3T3-E1 cells were exposed to 1% oxygen tension for the hypoxia condition. The cells were divided into four groups: G1-osteoblast differentiation medium only (as the hypoxic condition), G2-treatment with 50 mu M melatonin only, G3-laser irradiation (808 nm, 80 mW, GaAlAs diode) only, and G4-treatment with 50 mu M melatonin and laser irradiation (808 nm, 80 mW, GaAlAs diode). Immunoblotting showed that osterix expression was markedly increased in the melatonin-treated and laser-irradiated cells at 48 and 72 h. In addition, alkaline phosphatase activity significantly increased and continued to rise throughout the experiment. Alizarin Red staining showed markedly increased mineralized nodules as compared with only melatonin-treated or laser-irradiated cells at day 7, which significantly increased by day 14. Moreover, when melatonin-treated cells were laser-irradiated, the differentiation and mineralization of cells were found to involve p38 MAPK and PRKD1 signaling mechanisms. However, the enhanced effects of laser irradiation with melatonin were markedly inhibited when the cells were treated with luzindole, a selective melatonin receptor antagonist. Therefore, we concluded that laser irradiation could promote the effect of melatonin on the differentiation and mineralization of MC3T3-E1 cells under hypoxic conditions, and that this process is mediated through melatonin 1/2 receptors and PKRD/p38 signaling pathways.</P>
Objective evaluation for severity of atopic dermatitis by morphologic study of skin surface contours
Son, Sang W.,Park, Sang Y.,Ha, Seung H.,Park, Gyu M.,Kim, Min G.,Moon, Jong S.,Yoo, Dong S.,Oh, Chil H. Munksgaard International Publishers 2005 Skin research and technology Vol.11 No.4
<P>Background/aims</P><P>Wide variation in outcome methodology can make the interpretation of patient outcomes confusing and the comparison of the results of different studies almost impossible. It is important to objectively measure and record the severity of atopic dermatitis (AD) for routine clinical practice and research. The aim of this study was to evaluate whether morphologic study of skin surface contours might be helpful to objectively quantify the severity of AD.</P><P>Methods</P><P>Thirty atopic patients (12 females, 18 males) participated in this study. Moisturizer was applied twice daily for 2 weeks. Bioengineering methods such as D-Squame®, corneometer, evaporimeter, and spectrophotometer were measured at the start of the study and after 1 week and 2 weeks. In addition, we assessed moisturizer effects after 3 h of moisturizer application.The stereoimage optical topometer (SOT) based on a new concept of stereoimage was applied for this study. We compared SOT, other bioengineering methods, and the severity scoring of atopic dermatitis (SCORAD) index.</P><P>Results</P><P>After 3 h of application with moisturizer, the results measured by SOT, conventional optical profilometer (COP), D-Squame®, and corneometer showed significant differences (<I>P</I><0.05). After 1 and 2 weeks, there were significant changes in the results measured by SOT, COP, D-Squame®, corneometer, spectrophotometer, and SCORAD index. We observed a significant correlation between bioengineering methods and the SCORAD index (<I>P</I><0.05).</P><P>Conclusion</P><P>These data indicate that morphologic study of skin surface contours are useful in evaluating of AD severity. If we would combine methods to evaluate the physiologic changes and those such as SOT to measure the morphological changes of skin surface, we could evaluate more objectively and quantitatively the severity of AD.</P>
Son, H.A.,Yoon, K.Y.,Lee, G.J.,Cho, J.W.,Choi, S.K.,Kim, J.W.,Im, K.C.,Kim, H.T.,Lee, K.S.,Sung, W.M. Elsevier 2015 Journal of petroleum science & engineering Vol.126 No.-
<P><B>Abstract</B></P> <P>We investigated the use of silica nanoparticle-stabilized emulsions to displace oil in porous media. A low-quality (20%) n-decane-in-water emulsion was injected into a glass-bead pack containing mineral oil under residual oil saturation conditions. Continuous injection of the emulsion caused steady trapping and accumulation of emulsion droplets, which occurred despite the fact that the bead sizes were 250–500µm, whereas the average droplet size was ~30µm, as indicated by particle size analysis. By alternately injecting small banks of emulsion (0.1 pore volume (PV)) and water (0.23−0.1PV), the extent of emulsion droplet trapping could be controlled while achieving oil recovery.</P> <P>The effects of salt addition and polyvinyl alcohol (PVA)/nanoparticle concentration were also investigated in terms of emulsion stability and oil recovery. The salt addition (1wt%) more efficiently stabilized the droplets without significant coalescence and contributed to approximately 4% more oil recovery than achieved in the absence of an emulsion system. The PVA/nanoparticle concentration indicated that the emulsion with a low concentration (0.05wt%) of PVA and a high concentration (3wt%) of nanoparticles had greater stability and enhanced oil recovery compared with the opposite (a high concentration (0.2wt%) of PVA and low concentration (1wt%) of nanoparticles). These results indicated that the addition of salt and PVA/nanoparticle concentration influenced oil recovery and emulsion stability. Oil recovery was related to emulsion stability.</P>