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A STUDY ON THE EXPLOSION SAFETY ASSESSMENT OF HYDROCARBON REFRIGERANT REFRIGERATOR
Oh,Kyu-Hyung,Kim,Min-Kyu,Chu,Euy-Sung,Lim,Byung-Han,Kim,Man-Hoe,Park,Yoon-Ser 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-
This paper discribes an experimental explosion risk assessment study on refrigerators containing flammable hydrocarbon refrigerant. A refrigerator used in this study is a larder fridge type, 215 liter in volume. The hydrocarbon refrigerant used in the refrigerator is iso-butane(C<TEX>$_4$</TEX>H<TEX>$_{10}$</TEX>). For the explosion safety assessment of the refrigerator, temperature of compressor, cooling air circulation fan motor, defrost heater and inner lamp were measured during the operation. And to confirm the ignitablity of flammable gas by the electric spark of the switches of the refrigerator, ON-OFF test of all switches were conducted with compulsorily near the stoichiometric concentration atmosphere of iso-butane-air mixture. As the result of experiment above mentioned and another experiment for the explosion safety assessment, we can conclude that explosion hazard in connection with the use of hydrocarbon refrigerant was few.w.
Soo Young Oh,Joo Han Kim,Jung Keun Suh 대한신경외과학회 2003 Journal of Korean neurosurgical society Vol.33 No.5
A new technical method using bone plugs with oblique posterior interbody fusion(OPIF) was designed to increase the fusion rate. One hundred-seventy-five patients were operated for lumbar instability between November 1990 and December 2000. The L5/S1 segment was affected in 129 cases(74%) of the patients. Oblique posteior interbody fusion with bone plugs by unilateral approach was performed in all patients. Eight-nine percent of these patients showed good surgical results. This stable transplant interbody fusion has the several advantages. Foreign substance is not used and this method increases fusion rate and cost-effective. OPIF using bone plugs along with Oh's screw could provide sufficient stability for segmental instability of the lumbar spine including spondylolisthesis of the lumbar spine, with or without concurrent herniated intervertebral disc or spondylotic narrowing. Key words:Bone plug;Lumbar spine;Oblique posterior interbody fusion(OPIF);Oh's screw.
Jin-Yi Han3*, Xu Zi Guang, Jyung-Sik Kwak, Ki-Wan Oh, Han-Ik Bae 충북대학교 동물의학연구소 2012 Journal of Biomedical and Translational Research Vol.13 No.1
The anti-inflammatory effect of PHBV/Collagen (PHCP) was examined in a mouse model of lipopolysaccharide (LPS)-induced skin inflammation. Vascular permeability on the back skin was measured by the local accumulation of Evan’s blue dye after subcutaneous injection of LPS (30 μg site-1). Dye leakage in the skin showed a significant increase at 2 h after injection of LPS. This LPS-induced dye leakage was also completely inhibited by HO-1 inhibitor, ZnPP, and antioxidants, including methyl gallate, trolox, and mannitol. To study the possible mechanisms underlying the in vivo anti-inflammatory effect of PHCP against LPS-induced inflammation, we also examined the effects of PHCP on malondialdehyde (MDA) and glutathione levels in skin tissues and found that pretreatment with PHCP resulted in inhibited MDA elevation and a remarkable reduction of glutathione level. In addition, similar results were obtained after pretreatment with antioxidants, including trolox and mannitol, and HO-1 inhibitor, ZnPP. Histopathologically, an influx of neutrophils into the skin dermis was detected between 24 h and 72 h after LPS injection (30, 100 μg site-1), compared to control animals after injection of saline. This increase was greater in mice treated with 100 μg of LPS than in those treated with 30 μg of LPS and was significantly suppressed by pretreatment with PHCP, antioxidants, and HO-1 inhibitor. These results collectively suggest that PHCP has an anti-inflammatory effect against LPS-induced inflammation model in vivo and may be a good candidate for the skin tissue engineering biomedical application primarily through manipulation of the redox state.
권오민(Kwon Oh-mi),박상영(Park Sang-young),안상영(Ahn Sang-young),한창현(Han Chang-huyn),안상우(Ahn Sang-woo) 한국의사학회 2009 한국의사학회지 Vol.22 No.1
This article conducted an pilot study on Lee Gyu-Jun(李圭晙)’s life and thoughts. He championed, and is mainly based on, old annotations of ancient Confucian bibles古文 that were made in the Han漢 and Tang唐 era in Chinese history and consequently took additionally into account Zuxi朱熹’s annotations on Confucian bibles. This cause big trouble to him in conservative Gyeong Shang Province(嶺南). He participated in the Confucian Religion Movement孔敎運動 and proposed constitutional monarchy as a new polity fit for changing Korean history. He closely interacted with many resistants to the Japanese rule of Korea and had a mixed perspective on Western culture, science and technology, and social system, positive or negative, contingent on cases. He made great footprints in the history of both modern Korean medicine and philosophy. Thus there is an urgent need for the overall study on Lee Gyu-Jun in every aspect.
O/W형 microemulsion의 생성영역과 입자크기 및 안정성에 관한 연구
오주영 ( Joo-young Oh ),한창규 ( Chang-gew Han ),조춘구 ( Choon-ku Zhoh ) 대한화장품학회 1995 대한화장품학회지 Vol.21 No.2
본 연구에서는 ME의 각 성분의 구조가 그들의 생성영역, 입자의 크기 및 안정성에 미치는 영향을 고찰하고자 surfactant로서 POE sorbitan fatty acid 계를 사용하였고, oil로는 포화탄화수소계인 liquid paraffin, squalane, 방향족계열인 alkyl benzoate, Isostearyl benzoate를 그리고 cosurfactant로는 glycerine, propylene glycol, sorbitol, 1, 3-butanediol을 사용하여 4성분계 ME을 제조하고, 이 계에서 cosurfactant의 구조적 특성이 ME 생성영역에 미치는 영향과 그리고 oil과 surfactant의 구조 특성이 제조된 ME 입자크기 및 안정성에 미치는 영향을 고찰한 결과, cosurfactant로 polyol류를 사용했을 때, polyol 분자 중 탄소가 같은 경우 OH수가 많을 때, OH기 수가 같을 경우 탄소수가 적을 때 ME생성영역이 크게 나타남을 알 수 있었으며 제조된 ME의 입자 크기를 비교했을 때 oil의 극성이 클수록, surfactant 소수부분의 alkyl chain의 탄소수가 클수록 입자크기가 작게 나타났다. 또한 분산상으로 사용된 oil 중 alkyl benzoate나 Isostearyl benzoatbenzoate 에 비해서 포화탄수소계인 liquid paraffin, squalane으로 구성된 ME의 경시 안정성이 더 양호하였다. This study was investigated to search for the effects of the structure of each component in four-component O/W microemulsion system on its formation region, droplet size and stablilty. The results was that the more number of OH site, the shorter carbon chain length of polyol, the larger formation region of microemulsion was showed. The small microemulsion droplet was obtained on condition that the polatry of oil was large and carbon chain length of hydrophobic group of surfactant was long. In using satrated hydrocarbon (such as liquid paraffin, squalane) as dispersed phase, the stability of microemulsion was better than aromatic oil phase.
釜山地域 經濟發展을 위한 地域企業人의 役割과 責任 : 企業家精神과 地域的 責任을 中心으로
오종석,황한식,김종관 부산대학교 1995 地域經濟硏究 Vol.- No.4
한국경제는 지금까지 국가 중심적 경제체제를 유지해 왔으나, 세계화, 지방화라는 시대적 변화에 직면하여 지역 분권적 경제체제를 확립하고, 이를 통해서 지역경쟁력을 강화함으로서 지역중심의 세계화를 추진해 나가지 않을 수 없게 되었다. 따라서 본 연구는 효과적인 지역경제발전을 모색해 나가기 위해서 부산지역을 연구대상으로 하여, 지역경제발전의 주체와 지역경제발전의 원동력을 조명하고, 지역경제발전을 위해서는 어떠한 환경이 조성되어야 하는 지를 문헌연구와 실증연구를 토대로 하여 고찰해 보고자 하였다. 그 결과, 다음과 같은 결론을 도출할 수 있었다. 첫째, 세계화, 지방화 시대의 지역경제 발전전략은 자립적·내발적 이어야 하며, 지역 스스로가 발전주체가 되어야 한다는 점이다. 특히 지역기업인은 지역에서 가장 중심적인 역할을 담담해야 하며, 지역기업 중심의 지역주체성 확립이 지역경제 발전의 기반이 되어야 한다는 것이다. 둘째, 지역경제 발전의 원동력은 지역기업인의 기업가정신과 지역적 책임이며, 이것을 통해 기업의 내생력을 강화시켜서 기업발전을 이룩하고, 지역경제의 발전을 실현해 나가야 한다는 점이다. 셋째, 지역경제의 발전을 위해서는 지역경제의 낙후원인을 분석, 진단하고 이를 통해서 외생적 환경조건을 정비함으로써 지역경제의 발전을 도모해 나가야 한다는 것이다.