가토의 골수 세포에서 분화된 골모세포의 골 형성에 혈소판 농축 혈장이 미치는 효과: 조직 형태학적 분석

박영주,신진업,정재안,전민수,김보균,송준호,연병무,임성철,강태인,Park, Young-Ju,Shin, Jin-Eob,Chung, Jae-An,Jeon, Min-Su,Kim, Bo-Gyun,Song, Jun-Ho,Yeon, Byong-Moo,Lim, Sung-Chul,Gang, Tae-In 대한악안면성형재건외과학회 2007 Maxillofacial Plastic Reconstructive Surgery Vol.29 No.6

Purpose: The effect of platelet-rich plasma(PRP) on osteogenesis of marrow-derived osteoblasts on histomorphometric analysis in the mandible of rabbit was assessed. Materials and Method: Bone marrow cells were obtained from iliac bone of rabbits and were cultured in a Dulbecco's Modified Eagle's Medium(DMEM) with Dexamethasone, L-Ascortic acid, ${\beta}$-Glycerophosphate to proliferate and differentiate into osteoblasts for $4{\sim}5$ weeks. The expression of osteogenic mar-kers was detected by reverse transcription-polymerase chain reaction(RT-PCR) and silver nitrate stain. Then we prepared bony defects in the mandible of rabbit, 10.0mm in diameter and 4.0mm deep, by trephine bur. In the control group, the defects were filled with autogenous bone and cultured osteoblasts. In the experimental group, the defects were filled with autogenous bone, cultured osteoblasts and PRP. 2 weeks, 4 weeks, 8 weeks later, each group was evaluated with histological and histomorphometric analyses. Results: In vitro, osteoblasts were identified on RT-PCR and silver nitrate stain. According to histological observation, at 2 weeks well-developed anasto-mosing newly-formed woven bone was observed, at 4 weeks anastomosing newly-formed woven bone having osteoblastic activation was observed, and at 8 weeks thick newly-formed woven bone was observed in both control and experimental groups. According to histomorphometric analysis, there were 1.5% more newly-formed bone volume in experimental group than control group at 2 weeks, 28.4% more at 4 weeks, 4.3% more at 8 weeks. Particularly there were significant differences in bone volume at 4 weeks and 8 weeks new bone. Conclusion: Our results demonstrated PRP may enhance osteogenesis of marrow-derived osteoblasts at 4 weeks, 8 weeks.

산불에 따른 참나무의 화염확산 메커니즘 규명 및 화재조사에 관한 연구

박영주,이해평,Park,Young-Ju,Lee,Hae-Pyeong 한국방재학회 2011 한국방재학회논문집 Vol.11 No.6

본 연구에서는 참나무류를 대상으로 산불에 따른 화염확산 메커니즘과 화재조사를 고찰하였다. 측정 장비로는 콘칼로리미터와 발화온도시험기를 이용하였다. 부위별 무염착화가 진행된 온도범위는 생엽의 경우, <TEX>$346{\sim}382^{\circ}C$</TEX>, 가지 <TEX>$375{\sim}494^{\circ}C$</TEX>, 수피 <TEX>$396{\sim}473^{\circ}C$</TEX> 온도 구간에서 수종별 차이가 있었고, 함수율이 높은 생엽은 무염착화위험성이 상대적으로 높은 것을 확인할 수 있었다. 또한, 발염착화가 진행된 시간을 살펴보면, 생엽 67초, 가지 203초, 수피 23초로서 함수율이 현저히 낮은 수피부위는 빠른 시간에 발염착화 되었으며, 착화 후 가장 오랜 시간 화염이 지속되는 것을 알 수 있었다. 총열방출량은 생엽의 경우 <TEX>$18{\sim}53MJ/m^2$</TEX>, 가지부위 <TEX>$41{\sim}80MJ/m^2$</TEX>, 수피부위는 <TEX>$19{\sim}110MJ/m^2$</TEX> 정도 범위에서 수종별 발열량 차이가 크게 다른 것으로 나타났으며, 굴참나무는 부위별 발열량이 비교적 높은 수종인 것을 확인할 수 있었다. 따라서 산불발생 시 굴참나무 군락지는 발열량이 높기 때문에 높은 화재하중에 따른 화재경로를 파악하는데 중요한 단서가 될 수 있을 뿐만 아니라 최대 화재 밀도지역으로 구분하여 화염확산 및 화재강도 예측에 있어서도 유효한 단서가 될 수 있을 것으로 판단된다. In this study, we considered the mechanism of the flame spread and the fire investigation for oaks by forest fire. Cone calorimeter and ignition temperature tester were used as the equipments for this study. The temperature range of non-flame ignition was <TEX>$346{\sim}382^{\circ}C$</TEX> for living leaves, <TEX>$375{\sim}494^{\circ}C$</TEX> for branches, and <TEX>$396{\sim}473^{\circ}C$</TEX> for barks, respectively, which showed the difference by kind of trees. Thus, it was confirmed that the green leaves with high moisture content had relatively high risk of non-flame ignition. Also, the time of flaming ignition was 67 sec for living leaves, 203 sec for branches, and 23 sec for barks measured, respectively. Accordingly, it was confirmed that bark part with very low moisture content was flamingly ignited in a shorter time and its flame persisted for the longest time after ignition. And, it was shown that total thermal emission was <TEX>$18{\sim}53MJ/m^2$</TEX> for living leaves, <TEX>$41{\sim}80MJ/m^2$</TEX> for branches, and <TEX>$19{\sim}110MJ/m^2$</TEX> for barks, which were quite different by kind of trees. Further, it could be confirmed that the oaks was a kind of tree mostly with high thermal emission by part. Thus, it is determined that its community complex has high thermal emission and large fire load so that it can be a critical clue to understand fire path and a useful clue to forecast flame spread and fire intensity by its classification into the area of greatest fire density.

건축용 바닥재의 외부복사열에 의한 화재위험성 비교 연구

박영주,김영탁,Park, Youngju,Kim, Youngtak 한국안전학회 2017 한국안전학회지 Vol.32 No.5

In this study, we have performed the Cone Calorimeter test in accordance with ISO 5660-1 to check the combustion characteristics of building flooring materials. The fire risk of these materials were evaluated by construction code, KFI criteria and standards of flame retardant performance. When samples exposed to external heat flux, all samples consumed a lot of Oxygen for a long time. So heat release from sample burning continued so long. And also all samples produced so much smoke. Even though a few samples were satisfied with only peak heat release rate criteria, all 8 samples were not satisfied with criteria of peak heat release rate and total heat released together. The results of 5 min total heat released were $15.9MJ/m^2{\sim}5.9MJ/m^2$. It menas the results are more than 2~6 times higher than the criteria. The results of 10 min total heat released were $30.1MJ/m^2{\sim}100.8MJ/m^2$. It means the results are more than 3~12 times higher than the criteria. 6 of 8 samples were not satisfied with Dm.corr.(corrected maximum smoke density) criteria. The building flooring materials which we used for this test ignited very fast and the burning continued so long. It means these samples are susceptible to fire.

매력만점 서비스들 '언제 다 써보나'

박영주,Park, Yeong-Ju 한국정보통신집흥협회 2006 정보화사회 Vol.181 No.-

유선.무선을 막론하고 최근 경쟁적으로 내놓고 있는 서비스는 네트워크의 진화 및 관련 기술 개발에 따른 결과물이기도 하다. 특히 시장 선점을 통해 차세대 통신서비스 맹주로 거듭나려는 이들 사업자들의 분주한 움직임은 서비스 범위의 확대 및 유.무선, 통신.방송을 넘나드는 형태로 진행된다는 게 특징이다. 그야말로 '컨버전스 시대, 컨버전스 서비스로 승부한다'는 게 이들 통신사업자들의 모토인 셈.

차세대DVD 단일규격 결국 '무산'

박영주,Park, Yeong-Ju 한국정보통신집흥협회 2005 정보화사회 Vol.176 No.-

이광민 배리스 대표

박영주,Park, Yeong-Ju 한국정보통신집흥협회 2005 정보화사회 Vol.177 No.-

(주)배리스(VARIS. 대표 이광민)는 2005년 1월 18일 법인을 설립한 신생벤처이다. ' VAluable Relationship Information System' 약자로 회사 명칭을 정한 데서도 '관계'를 중요시 하는 이 업체의 설립취지를 엿볼 수 있다. 이 업체의 창업 아이템인 '휴대전화번호 e메일 서비스' 역시 이 연장선에 있다. 휴대전화번호를 e메일 식별자로 하자는 역발상은 제법 신선하다. 또 병행 개발중인 '고객맞춤형 택시콜 서비스' 역시 사업체와 이용자간 '최적화된' 편리를 도모하기 위한 데서 착안된 서비스이다.

영상분석법에 의한 쌀 품위 자동분석

박영주,Park Young-Joo 한국작물학회 2004 Korean journal of crop science Vol.49 No.suppl1

'DMB' 국내외에서 '뜬다' 위성.지상파DMB 수출 효자품목 '기대주'

박영주,Park, Yeong-Ju 한국정보통신집흥협회 2005 정보화사회 Vol.177 No.-

국내 업체들 '블루투스'선점 위해 잇단 출사표

박영주,Park, Yeong-Ju 한국정보통신집흥협회 2000 정보화사회 Vol.143 No.-

청폐사간탕(淸肺瀉肝湯)의 혈소판 응집억제 작용에 대한 in vitro 연구

박영주,김슬지,양가은,이미정,이지숙,강덕희,김영찬,이우경,류재환,Park, Young-Ju,Kim, Seul-Ji,Yang, Ga-Eun,Lee, Mi-Jung,Lee, Ji-Sook,Kang, Deok-Hui,Kim, Young-Chan,Lee, Woo-Kyung,Ryu, Jae-Hwan 대한한방내과학회 2010 大韓韓方內科學會誌 Vol.31 No.4

Objective : The study was designed to test the anti-platelet effect of the extract Cheongpyesagan-tang and compare it with aspirin in vitro. Methods : The extract from Cheongpyesagan-tang was made by the pharmacy department of Kyung Hee Oriental Medical Hospital. The extract was investigated for inhibition against the collagen induced aggregation of human platelet suspensions on aggregometry. Aspirin and aspirin-Cheongpyesagan-tang were investigated together. Results : 1. In collagen induced human platelet aggregation test, the extract from Cheongpyesagan-tang significantly inhibited in concentration 30mg/ml (p<0.05), 40mg/ml, 50mg/ml (p<0.001) and the effect depended on concentration over 20mg/ml. 2. Aspirin and aspirin-Cheongpyesagan-tang inhibited collagen induced human platelet aggregation significantly (p<0.001). Aspirin-extract of Cheongpyesagan-tang inhibition rate was higher than aspirin only (p<0.05). Conclusions : The extract of Cheongpyesagan-tang has anti-platelet aggregation and synergic effect with aspirin on human platelet in vitro.