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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.
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.
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.
모니터링 로봇을 위한 무선네트워크 기반 온실 환경 정보 수집 장치 구현
김원경 ( Won-kyung Kim ),이기범 ( Ki-beom Lee ),조병효 ( Byeong-hyo Cho ),김만중 ( Man-jung Kim ),김용현 ( Yong-hyun Kim ),이성민 ( Seong-min Lee ),홍영기 ( Young-ki Hong ),김경철 ( Kyoung-chul Kim ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.1
현재 전 세계적으로 농업생산의 고부가가치화 및 농업인구의 고령화에 대응하기 위하여 농업 로봇의 개발 필요성이 점점 증가하고 있다. 아울러, 시설원예 관련 로봇 시장은 지속적인 증가가 예상되고 있다. 국내 역시 농업 생산시스템의 스마트화가 진행되면서 농업 로봇 관련 시장이 확대되는 추세이지만 국내 농업용 로봇은 상용화가 이루어지지 않아 대부분 해외에 의존하고 있는 실정이다. 따라서 국내의 작물 생육특성과 환경에 대한 데이터를 기반으로 한 국내용 농업 로봇개발의 기초연구로써 본 논문에서는 모니터링 로봇개발을 위해 무선네트워크 기술을 활용하여 원격으로 온실 환경 정보를 모니터링 할 수 있는 온실 환경 정보 수집 장치를 설계하고 구현하였다. 온실 환경요소를 측정할 수 있는 환경 센서로 온도-습도-기압센서(Web-Thermo-Hygrobarometer, W&T, Wuppertal, Germany), CO2센서(Web-IO CO2, W&T, Wuppertal, Germany), 일사량센서(SMP10-V, KIPP & ZONEN, Delft, Netherlands)를 사용하였다. 환경 센서에서 수집된 데이터를 관리하는 장치로 rule.box digital (W&T, Wuppertal, Germany)를 이용하였으며 시각화 프로그래밍을 위해 플로우 기반의 오픈소스 개발도구인 Node-RED (ver.1.2.2, IBM Emerging Technology, Califonia, USA)를 이용하여 데이터의 입출력 처리 및 데이터 모니터링을 수행하였다. 또한 RuggedAir1000 (Acksys, Villepreux, France)과 EmbedAir1000/R2 (Acksys, Villepreux, France)를 이용하여 무선네트워크 환경을 구현하였다. 본 연구에서 구현한 무선네트워크 기반의 온실 환경 정보 수집 장치는 실험온실에서의 실증실험을 통해 온실 환경 정보의 원격모니터링 성능을 확인하고자 한다.
김원경(Won-Kyung Kim),김남익(Nam-Ik Kim),김상진(Sang-Jin Kim) 한국발육발달학회 2021 한국발육발달학회지 Vol.29 No.1
The purpose of this study is to verify how hamstring threading affects flexibility and back pain in 14 patients suffering from chronic back pain. Stretching exercise was conducted for 8 weeks from September 2020 using surrounding objects at each work site in consideration of the situation where group exercise due to COVID-19 was not possible. The exercise method consisted of three stages from low-level stretching to intermediate-level stretching and high-level stretching, and the exercise time was performed once per hour (repeated 3-5 times of steps 1, 2, and 3) at work. Prior to the experiment, 14 subjects were pre-tested and post-test was performed after the program was applied. The results of the effect of hamstring stretching on flexibility and back pain are shown in Table. Same as 3. There was no statistically significant difference in the change in flexibility before and after the experiment measured in this study, but there was a difference of more than 1 CM from the average of 8.15 CM before to 9.49 CM after the experiment. This is the result shown in a short period of 8 weeks, and it is judged that it is necessary to verify more in-depth results through long-term follow-up studies. In the results of the change in back pain, there was a statistically significant difference in the change in back pain (p<.01) before and after the experiment. This result is that the hamstring shortened due to poor posture and sitting in a chair for a long time causes back pain, and stretching the shortened hamstring has a positive effect on back pain. In addition, there are previous studies showing that shortened hamstrings adversely affect not only back pain, but also muscles around the hips, pelvis, etc. Currently, the number one mortality rate among the elderly over 80 is falling. Back pain has a direct correlation with gait, and in this study, the subjects were l imited to office workers in their 20s and 30s, but it is expected that more effective and clear pain improvement measures can be suggested through research by age group in the future.