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- 저자 : Pil-Gon Kim (검색결과 139 건)
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金範錫,金星坤,韓必熙,朴樹榮,李宜宣,崔祐榮 明知大學校 産業技術硏究所 2009 産業技術硏究所論文集 Vol.28 No.-
In general, LED display system displays the fixed text in ROM. In this paper, we propose the wireless real-time LED display system in which the text can be easily displayed in any text color and display mode by users And the system can be set up in any place by using Zigbee communication.
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Kim, Pil-Gon,Roh, Ji-Yeon,Hong, Yongseok,Kwon, Jung-Hwan Pergamon Press 2017 Chemosphere Vol.184 No.-
<P><B>Abstract</B></P> <P>Passive sampling can be applied for measuring the freely dissolved concentration of hydrophobic organic chemicals (HOCs) in soil pore water. When using passive samplers under field conditions, however, there are factors that might affect passive sampling equilibrium and kinetics, such as soil water saturation. To determine the effects of soil water saturation on passive sampling, the equilibrium and kinetics of passive sampling were evaluated by observing changes in the distribution coefficient between sampler and soil (<I>K</I> <SUB> <I>sampler/soil</I> </SUB>) and the uptake rate constant (<I>k</I> <SUB> <I>u</I> </SUB>) at various soil water saturations. Polydimethylsiloxane (PDMS) passive samplers were deployed into artificial soils spiked with seven selected polycyclic aromatic hydrocarbons (PAHs). In dry soil (0% water saturation), both <I>K</I> <SUB> <I>sampler/soil</I> </SUB> and <I>k</I> <SUB> <I>u</I> </SUB> values were much lower than those in wet soils likely due to the contribution of adsorption of PAHs onto soil mineral surfaces and the conformational changes in soil organic matter. For high molecular weight PAHs (chrysene, benzo[<I>a</I>]pyrene, and dibenzo[<I>a,h</I>]anthracene), both <I>K</I> <SUB> <I>sampler/soil</I> </SUB> and <I>k</I> <SUB> <I>u</I> </SUB> values increased with increasing soil water saturation, whereas they decreased with increasing soil water saturation for low molecular weight PAHs (phenanthrene, anthracene, fluoranthene, and pyrene). Changes in the sorption capacity of soil organic matter with soil water content would be the main cause of the changes in passive sampling equilibrium. Henry's law constant could explain the different behaviors in uptake kinetics of the selected PAHs. The results of this study would be helpful when passive samplers are deployed under various soil water saturations.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Effects of soil water saturation on sampling equilibrium and kinetic were observed. </LI> <LI> In dry soil, <I>K</I> <SUB> <I>sampler/soil</I> </SUB> values were much lower than those in wet soils. </LI> <LI> Changes in properties of soil organic matter via wetting affected <I>K</I> <SUB> <I>sampler/soil</I> </SUB>. </LI> <LI> Varying <I>K</I> <SUB> <I>sampler/soil</I> </SUB> and Henry's law constants of chemicals influenced <I>k</I> <SUB> <I>u</I> </SUB> values. </LI> <LI> Results in this study provide a helpful insight on passive sampling in unsaturated soils. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Kim, Sang-Gon,Wang, Yiming,Lee, Chang-Hoon,Mun, Bong-Gyu,Kim, Pil-Joo,Lee, Sang-Yeol,Kim, Yong-Chul,Kang, Kyu-Young,Rakwal, Randeep,Agrawal, Ganesh Kumar,Kim, Sun-Tae The Korean Society for Applied Biological Chemistr 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.5
Rice takes up phosphorous (P) as major nutrient source for its growth and development when grown under anaerobic water-logged soil conditions. To better understand the underlying mechanisms and to develop potential protein biomarkers of P-starvation, hydroponically-grown rice seedlings in the complete media and phosphorus absence (P-starvation) of phosphorous nutrient solutions were investigated for physiological and proteome changes. The P-starvation manifested significant reduction in root growth in three-week-old seedlings compared to respective complete media. Furthermore, P-starvation also showed increased activity of acid phosphatase in roots of one- and three-week-old seedlings, suggesting that experimental design is suitable for proteomics survey of P-starvation responsive proteins. Two-dimensional gel electrophoresis coupled with matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) mass spectrometry analysis of total root protein from three-week-old seedlings identified 10 P-starvation responsive protein spots out of 140 high-quality protein spots. Identified 10 proteins were involved in metabolism and defense/stress response. Out of 10, 2 and 8 protein spots were found to be up- and down-regulated, respectively. Semi-quantitative reverse transcription polymerase chain reaction (RT-PCR) analysis of corresponding genes of four randomly selected proteins, including putative glyceraldehydes-3-phophate dehydrogenase (G3PDH, spot R1), S-adenosyl-L-methionine synthetase (SAMS, spot R4), ATP synthase subunit alpha (spot R6), and root-specific pathogenesis-related protein 10 (PR-10, spot R8), showed that just as protein abundance, these proteins are also regulated at the transcript level. Results suggest identified P-starvation responsive proteins are involved in maintaining nutrient homeostasis and/or associated with changes in root physiology under the absence of P.
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Improved Air-Gap Control for SIL-Based Near-Field Recording System
Kim, Joong-Gon,Kim, Tae-Hun,Choi, Hyun,Yoon, Yong-Joong,Jeong, Jun,Park, No-Cheol,Yang, Hyunseok,Park, Young-Pil IEEE 2007 IEEE transactions on magnetics Vol.43 No.2
<P>We propose a gap servo method to reduce the overshoot in the near-field (NF) region. In general, we use a mode-switching servo which consists of approach, hand-over, and gap-control modes. However, there is a critical problem, such as an overshoot at the turning point from the approach mode to the hand-over mode, which may cause a collision between the SIL and the disk. In this paper, we propose an improved NF gap servo system using an exponential input in the approach mode which can reduce the overshoot and settling time of the mode-switching servo</P>
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MRI 를 이용한 정상 한국 성인의 기관지 측정에 관한 연구
김영대,김영기,문병수,김필곤,김용휘,강순호 대한마취과학회 1993 Korean Journal of Anesthesiology Vol.26 No.6
It is clinically important to know the size of normal trachea for airway management and respiratory care. The knowledge is useful for avoiding many possible complications due to tracheal intubation by appropriate choice of endotracheal tube size. Therefore, we investigated antero-posterior(A-P) diameter, transverse diameter and cross- sectional area(CSA) of trachea at various level with MRI(magnetic resonance imaging) in 70 males and 79 females who were divided into three age groups(group 1: 16-39 year of age, group 2: 40-59 year of age, group 3: 60-83 year of age), and they had no abnormalities in cardiopulmonary system. The results were as follows; 1. A-P 2. Transverse 3. Narrowing portion 4. CSA 1. A-P diameter of trachea was 17.1±1.4 mm in male and 13.9±1.3 mm in female. Transverse diameter of trachea was 15.1±1.6 mm in male and 13.3±1.5 mm in female(Table 1). A-P and Transverse diameters were greater in male than in female (P$lt;0.05). 2. C-7 was the narrowest portion of A-P diameter in both sex (P$lt;0,05-5 was the narro- west portion of transverse diameter in both sex (P$lt;0.05). 3. A-P diameters of trachea among male patients were 17.1±1.2 mm, 17.41.6 mm, and 16.6± 1.3 mm in group 1, 2 and 3 (Table 3, Fig. 4). A-P diameters of trachea in female age group 1, group 2 and group 3 were 13.7±1.2 mm, 14.3±1.3 mm, and 13.6±1.5 mm(Table 3, Fig. 4). Transverse diameters of trachea in male age group 1, group 2 and group 3 were 14.8±1.4 mm, 15.1±1.7 mm, and 15.4±1.6 mm(Table 3, Fig. 4). Transverse diameters of trachea in female age group 1, group 2 and group 3 were 13.0± 1.2 mm, 13.6±1.9 mm and 13.5±1.4 mm(Table 3, Fig. 4). 4. CSA(cross sectional area) of trachea were 201.1±31.3㎟ in male and 145.4±27.7(2) mm in female(Table 4). 5. CSA at C5, C6, C7 and Tl in male were 175.9±61.1 ㎟, 201.1±43.8 ㎟, 196.2±36.2 ㎟ and 230.9±463 ㎟ (Table 4, Fig. 5). CSA at C5, C6, C7 and Tl in female were 127.0± 33.4 ㎟, 138.434.6 ㎟, 140.734.7 ㎟ and 171.7±42.0 ㎟ (Table 4, Fig. 5). 6. CSA oe patients were 198.1±28,5 ㎟, 206.2±33.0 ㎟ and 198.3±33.1 ㎟ in group 1, 2 and 3 (Table 5, Fig. 6). CSA of trachea in female age group 1, group 2 and group. 3 were 140.2±25.0 ㎟, 152.8±32.4 ㎟ and 145.6±25.1 ㎟ (Table 5, Fig. 6). But there was no significant difference between groups according to the sex. 7. CSA of trachea in age groups were stastically insignificant for both sex.
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Kim, Keun Pil,Kim, Yun-Gon,Choi, Chang-Hyung,Kim, Hye-Eun,Lee, Sang-Ho,Chang, Woo-Suk,Lee, Chang-Soo Royal Society of Chemistry 2010 Lab on a chip Vol.10 No.23
<P>Antibiotic resistance of biofilms is a growing public health concern due to overuse and improper use of antibiotics. Thus, determining an effective minimal concentration of antibiotics to eradicate bacterial biofilms is crucial. Here we present a simple, novel one-pot assay for the analysis of antibiotic susceptibility of bacterial biofilms using a microfluidics system where continuous concentration gradients of antibiotics are generated. The results of minimal biofilm eradication concentration (MBEC) clearly confirm that the concentration required to eradicate biofilm-grown <I>Pseudomonas aeruginosa</I> is higher than the minimal inhibitory concentration (MIC) that has been widely used to determine the lowest concentration of antibiotics against planktonically grown bacteria.</P> <P>Graphic Abstract</P><P>This study presents a microfluidic approach for the <I>in situ</I> analysis of antibiotic susceptibility of bacterial biofilms using the generation of a continuous concentration gradient of antibiotics. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0lc00154f'> </P>
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광봉을 이용한 기관내 삽관후 발생한 좌측 피열연골의 탈구
김상현,김영대,김필곤,김용휘,강순호 대한마취과학회 1998 Korean Journal of Anesthesiology Vol.35 No.4
Complications from use of the light wand have been reported rarely. We present a case of arytenoid cartilage dislocation incurred by using this technique for intubation of a patient. A 35-year-old healthy woman was admitted for microsurgical cervical diskectomy. Anesthesia was induced and a 7.0 mm cuffed endotracheal tube with a light wand was inserted during blind orotracheal intubation. The trachea was extubated without any difficulty in the operating room after the surgery. In the third postoperative day, the patient complained sore throat and mild hoarseness. In the eighth postoperative day, the patient was discharged for follow-up of department of neurosurgery. In the second day after the discharge, she was consulted to otolaryngology service in our hospital because she suffered from persistent hoarseness. Flexible nasopharyngolaryngoscopy revealed anterior and inferior dislocation of left arytenoid cartilage. The patient was taken to the operating room for reduction of the dislocated cartilage by the otolaryngologists. Despite the delayed reduction, which was performed tenth day after her initial injury, the patient,s hoarseness had resolved completely without further treatment. (Korean J Anesthesiol 1998; 35: 751∼755)
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Gon-Sup Kim,Oh-Sung Park,Mun-Ki Kim,Pil-Ok Koh,Jae-Haen Cho,Chung-Kil Won 한국실험동물학회 2009 Laboratory Animal Research Vol.25 No.2
This study was performed to examine the effect of 2,3,4,4',5-pentachlorobiphenyl (PCB 114) on morphological changes in the testes of rats. PCB 114 (20 mg/kg/week) in corn oil was intraperitoneally injected into adult rats for 2, 5, and 8 weeks, with injections carried out weekly. The total body weights and testicular weights were measured at 3, 6, and 9 weeks during PCB treatment, respectively. The morphological changes in the rat testes were then analyzed by light microscopy (LM) and transmission electron microscopy (TEM). The results showed that PCB 114 caused no significant change in the body weight but caused a marked increase in the testicular weights at 6 weeks. The LM results proved that the size of their seminiferous tubules slightly increased by PCB treatment, and cytoplasmic vacuolation and damaged nuclear membrane of spermatogenic cells were evident at 6 weeks in the electon microscopical examination. These results suggest that the reproductive of the adult male rats is effective to PCB 114, and that may induce degenerative changes in testicular parenchyma of adult male rats.
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