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골형성유도단백질의 첨가가 ${\Delta}^{12}-PGJ_2$가 유도하는 석회화에 미치는 영향
김원경,김경화,김종진,이영규,구영,Kim, Won-Kyung,Kim, Kyoung-Hwa,Kim, Jong-Jin,Lee, Young-Kyu,Ku, Young 대한치주과학회 2005 Journal of Periodontal & Implant Science Vol.35 No.2
Prostaglandin plays a significant role in the local control of bone metabolism associated with periodontal disease. ${\Delta}^{12}-PGJ_2$ is a natural $PGD_2$ metabolite that is formed in vivo in the presence of plasma. It is known for ${\Delta}^{12}-PGJ_2$ to stimulate calcification in osteoblastic cells. Bone morphogenetic protein(BMP) stimulated osteoblastic differentiation in various types of cells and greatly enhanced healing of bony defects. The purpose of this study was to evaluate the effect of rhEMP-2 on ${\Delta}^{12}-PGJ_2$ induced osteoblastic differentiation and mineralization in vitro. A human osteosarcoma cells line Saos-2 were cultured. In the test groups, 10-7M of ${\Delta}^{12}-PGJ_2$ or mixture of 10-8M of ${\Delta}^{12}-PGJ_2$ and 100ng/ml of rhBMP-2 or 100ng/ml of rhEMP-2 were added to culture media. After 1 day, 2 days and 4 days of culture period, the cell number was measured. Alkaline phosphatase activity was measure at 3 days. Reverse transcription polymerase chain reaction(RT-PCR) was performed to determine the expression of mRNA of bone matrix protein at 8 hours, 1 day and 7 days. The ability to produce mineralized nodules in rat osteoblasts(MC3T3-E1) was evaluated at 21 days. The results were as follows : 1. rhEMP-2 or mixture of rhBMP-2 and ${\Delta}^{12}-PGJ_2$ inhibited cell proliferation of human osteosarcoma cells. 2. rhEMP-2 or mixture of rhBMP-2 and ${\Delta}^{12}-PGJ_2$ stimulated alkaline phosphatase activity significantly higher than ${\Delta}^{12}-PGJ_2$ alone. 3. rhBMP-2 or mixture of rhEMP-2 and ${\Delta}^{12}-PGJ_2$ stimulated mineralization compared to ${\Delta}^{12}-PGJ_2$ alone. 4. mRNA of alkaline phosphatase, BMP-2, cbfa 1, Type I collagen were detected in the group treated with ${\Delta}^{12}-PGJ_2$/rhBMP-2, rhBMP-2 alone, ${\Delta}^{12}-PGJ_2$ alone. These results show that mixture of ${\Delta}^{12}-PGJ_2$ and rhBMP-2 causes more bone formation than ${\Delta}^{12}-PGJ_2$ alone while the bone formation effects of mixture of ${\Delta}^{12}-PGJ_2$ and rhBMP-2 are less than those of rhBMP-2 alone. Further researches would be necessary to clarify the interactions of these agents.
알루미늄메쉬커튼과 2류체 포그시스템을 적용한 개방형축사의 에너지 절감시스템에 관한 연구
김원경,강민우,양지웅,이은숙,신홍건,박진규,최원식,Kim, Won-Kyung,Kang, Min-Woo,Yang, Ji-Woong,Lee, Eun-Suk,Shin, Hong-Gun,Park, Jin-Gyu,Choi, Won-Sik 한국산업융합학회 2020 한국산업융합학회 논문집 Vol.23 No.6
The control on temperature and humidity on the cow-house is essential to assure production efficiency and the control on disease of cows. Fog system and screen fence are typical methods to drop the temperature inside of cow-house during the summer season. This study focused on the change in temperature and humidity under the condition of application of those methods. The results indicate that the installation of atomizer and insulation curtain cause decrease in temperature and increase in humidity. However, Using both of methods at the same time doesn't make any additional meaningful effects on temperature and humidity.
약물함유 생체분해성 차폐막의 생채활성도 및 골조직 유도재생 효과
김원경,최상묵,한수부,권영혁,정종평,이승진,Kim, Won-Kyeong,Choi, Sang-Mook,Han, Soo-Boo,Kwon, Young-Hyuk,Chung, Chong-Pyoung,Lee, Seung-Jin 대한치주과학회 1997 Journal of Periodontal & Implant Science Vol.27 No.1
The purpose of this study was to evaluate the effects of tetracycline(TC}, flurbiprofen, and PDGF-BB loaded biodegradable membranes on the cell-attachment, the activity of loaded PDGF-BB, in vivo release kinetics, and guided bone regenerative potentials. To evaluate the cell attachment to membranes, the number of gingival fibroblasts attached to each membrane(10% TC, 10% flurbiprofen, $200ng/cm^2$ PDGF-BB loaded membranes, drug-unloaded membrane) was counted by coulter counter and the morphologic pattern of attached cells was examined under SEM. To determine whether the activity of loaded PDGF-BB is sustained, the cellular growth and survival rate of gingival fibroblasts was used for both standard PDGF-BB and loaded PDGF-BB. For evaluation of in vivo release kinetics, drug-loaded membranes were implanted on the dorsal skin of the rats. On 1, 3, 7, 10, 14, 21, and 28 days after implantation, the amount of remaining drugs were measured by HPLC assay for TC and flurbiprofen, and by ${\gamma}-scintillation$ counter for $PDGF-BB^{1125}$. For evaluation of guided regenerative potential, the amount of new bone in the calvarial defect(5mm in diameter) of the rat was measured by histomorphometry 1 and 2 weeks after implantation of membranes. The number of cells attached to the PDGF-BB loaded membrane was largest as compared with the other mernbranes.(p< 0.05) The activity of loaded PDGF-BB was not significantly different from the activity of standard PDGF-BB.(p<0.05) After initial burst release of drug during the first 24 hours, drugs were gradually released for 4 weeks. Especially the release rate of PDGF-BB was nearly constant during 4 weeks. PDGF-BB loaded membranes(200, $400ng/cm^2$) were effective in guided bone regeneration as compared with drug-unloaded membrane. These results implicate that drug-loaded biodegradable membranes might be a useful for guided bone regeneration.
치주치료가 약물성 치은비대 환자의 치은두께에 미치는 효과에 관한 연구
김원경,백진,이영규,Kim, Won-Kyung,Baek, Jin,Lee, Young-Kyoo 대한치주과학회 2005 Journal of Periodontal & Implant Science Vol.35 No.4
The purpose of this study was to observe the effects of periodontal therapy, including nonsurgical periodontal therapy with azithromycin, surgical therapy, and maintenace therapy on the drug-induced gingival enlargement, by means of measuring gingival thickness. The test group of 18 patients with drug-induced gingival enlargement received scaling, root planing with azithromycin for 5 days, with or without surgical periodontal treatment. The control group of 18 patients who had not taken any medication, received scaling and root planing, with or without surgical periodontal treatment. Both groups received supportive periodontal therapy every 3 months for 2 years. The mean period of total treatment is 32 months in the test group and 31 months in the control group. The thickness of the buccal gingiva was measured using an ultrasonic device of $SDM^{(R)}$(Krupp Corp., Essen, Germany). The results revealed that the test $group(1.21{\pm}0.51mm)$ showed statistically thicker buccal gingiva than the control $group(1.01{\pm}0.3mm)$. In the test group, the buccal gingiva was thickest on 2nd molars and was thinnest on canines of both dental arches. In the control group, the buccal gingiva was thickest on central incisors in the maxilla and 2nd molars in the mandible, while the thinnest areas were on canines in the maxilla and 1st premolars in the mandible. It would be concluded that the periodontal treatment with azithromycin aids in decreasing the degree of the gingival enlargement but cannot prevent the recurrence completely.
김원경 ( Won-kyung Kim ),김용현 ( Yong-hyun Kim ),서다솜 ( Dasom Seo ),송혜영 ( Hye-young Song ),조병효 ( Byeong-hyo Cho ),김경철 ( Kyoung-chul Kim ) 한국농업기계학회 2021 한국농업기계학회 학술발표논문집 Vol.26 No.2
최근 전 세계적으로 농업생산의 고부가가치화 및 농업인구의 고령화에 대응하기 위하여 농업 로봇의 개발 필요성이 점점 증가하고 있다. 아울러, 시설원예 관련 로봇 시장은 지속적인 증가가 예상된다. 국내 역시 농업 생산시스템의 스마트화가 진행되면서 농업 로봇 관련 시장이 확대되는 추세이다. 하지만 농업 로봇의 사용에 있어서 평가 기준이 되는 농업기계 관련 국내 표준화 활동은 유럽 및 북미 선진국에 비하여 많이 미흡한 상황이고 심지어 로봇 국제 표준화 기구인 ISO TC299에서는 농업 분야가 아예 반영되어 있지 않은 실정이다. 따라서 현 상황에서 농업 로봇의 성능을 평가하기 위해서는 서비스 로봇의 성능평가 방법(KS B ISO 18646-1)에 따라야 하는데 KS B ISO 18646-1은 실내 환경의 바퀴형 로봇에 국한되기 때문에 실제 농업용 로봇에 적용하기에는 문제가 있는 상황이다. 따라서 본 연구는 농업용 로봇 상용화를 위한 표준화를 위해 농업용 로봇을 위한 이동성능 평가 시스템을 제안한다. 기존의 로봇의 이동성능은 5,000mm 이상의 충분한 거리에서 로봇의 이동 시작과 정지 시간을 측정하여 평가하였으나 농업용 로봇은 농업 작업의 특성상 길이와 이동구간의 간격이 많이 제한되고 이동구간 사이에 작물이나 과실 또는 여러 가지 구조물이 존재하기 때문에 본 논문에서는 농업용 로봇의 정확한 이동 성능을 평가하기 위해 Indoor GPS와 IMU센서를 이용한 이동성능 평가 시스템을 구축하여 기존의 이동성능 평가 시스템과 비교·분석하고자 한다.
실시간 토양 판별을 위한 근적외선 분광기술과 인공신경망 기술의 적용
김원경(Won-Kyung Kim),홍석주(Suk-Ju Hong),최금실(Jinshi Cui),김학진(Hak-Jin Kim),박종민(Jongmin Park),양승환(Seung-Hwan Yang),김기석(Ghiseok Kim) 한국비파괴검사학회 2017 한국비파괴검사학회지 Vol.37 No.3
본 연구에서는 농업용 노외기계가 노지 작업 중에 실시간으로 토양의 유형을 판별할 수 있는 기술을 개발하기 위해서 근적외선 분광기술과 인공신경망 분석기술을 적용하였다. 이를 위해, 노지의 상태에 따라 토양과 검출기 사이의 측정거리가 변화되는 현상을 보정하고 측정 중 유입될 수 있는 잡음 성분들을 제거할 수 있는 전처리기술을 구현하였고 측정된 반사광의 스펙트럼 정보를 이용하여 토양의 유형을 판별할 수 있는 통계학적 모델과 인공신경망 분석모델을 개발하여 그 성능을 평가하였다. 본 연구를 통해 개발된 실시간 토양 유형 판별기술은 ICT 기반 지능형 농작업 기계의 주요한 요소기술로서 적용될 수 있을 것이며 향후에는 토양 유형의 판별뿐만 아니라 토양 성분을 예측하고 분석할 수 있는 비파괴검사 기술의 원천기술로서 활용될 수 있으리라 판단된다. In this study, we employed both near-infrared spectroscopy and artificial neural network analysis methods to develop a real-time discrimination technique for soil categories for use in agricultural machinery. For this purpose, we implemented the preprocessing methods that could eliminate noise components during measurement. In addition, a distance correction method was devised to calibrate the spectra difference using the change in measuring distance between the soil surface and detector end. We developed the PLS-DA model and artificial neural network model for the discrimination of soil categories using the preprocessed spectra. Based on the results, we expect that the developed discrimination method for soil categories could be used as a practical nondestructive evaluation technique for soil categories as well as a key element technique of ICT-based agricultural machinery.