TERUDERMIS를 이용한 골 혹은 건이 노출된 창상의 치료

최민호,이상복,황정욱,양완석,이강길 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3

Deep skin and soft tissue defects with exposed bone and tendon is difficult to treat, because skin graft rarely survives and flap surgery is sacrifice of donor site. Since "Stage I" membrane was developed by Yannas and Bruke in 1980, numerous kinds of artificial skin have been developed. The adaptability of "Terudermis", developed by the Terumo Co., as an artificial skin composed of sponge made of a fibrillar atelocollagen and a heat-denatured atelocollagen, was clinically evaluated on application to 13 cases presenting deep skin and soft tissue defect with exposed bones and tendons from October 1997 to march 1998. Terudermis has the advantage of allowing early incorporation of fibroblasts and capillaries into its collagen sponge due to very weak dehydrothermal cross-linking. Before Terudermis graft, several days of wet dressing and debridement were required to prepare healthy well- vascularized bed because Terudermis was weak on unsanitary wounds. After bed preparation, Terudermis was grafted like usual skin graft. Tie-over bolster dressing or compressive dressing was used case by case. The dressing was opened 2~3 days after Terudermis grafting. Wet dressing was done daily until the skin graft was done. Autologous skin graft was done 2∼3 weeks after Terudermis graft. Our clinical results indicated that Terudermis was beneficial in treating 77% of our patients. Through the use of this new method, treatment of severe skin and soft tissue defects that are usually treated by musculocutaneous or other conventional skin flaps can be replaced by Terudermis as an new artificial dermis.

콘크리트 포장의 플라이애쉬 재활용 방안연구

정영화,최성용,윤경구,용석응,김태경 강원대학교 석재복합신소재제품연구센터 1998 석재연 논문집 Vol.3 No.-

한국 대부분의 고속도로는 콘크리트로 포장되고 있으며, 플라이애쉬를 포장용 콘크리트에서 재활용하면 콘크리트의 성능을 향상시킴과 동시에 경제적 이익과 환경보호에 큰 기여를 할 것이다. 본 연구에서는 플라이애쉬를 포장 콘크리트에 재활용하고자, 플라이애쉬 치환율, 물-시멘트비, 굵은골재 최대치수를 주요실험 변수로 하여 이들이 플라이애쉬를 혼입한 포장용 콘크리트의 역학적 특성에 미치는 영향을 살피기 위해서 실험하여 통계처리 분석하였다. 이러한 분석결과를 바탕으로 포장 콘크리트의 적정배합을 제시하였으며 결과는 다음과 같다. 플라이애쉬를 혼입한 포장콘크리트의 휨강도에 영향을 미치는 인자는 플라이애쉬 치환율이 가장 큰 것으로 나타났으며, 다음으로 굵은골재 최대치수와 물-시멘트비 순으로 영향을 미친다. 또한, 플라이애쉬 치환율과 굵은골재 최대치수의 상관관계가 가장 큰 것을 알 수 있었다. 목표압축강도를 목표 휨강도의 6배로 선택하여 적정구간을 결정하였으나, 적정배합구간이 목표압축강도에 의해서 결정되었다. 이는 플라이애쉬의 작은 수화물이 공극을 효과적으로 채움으로써 휨강도의 증진에 크게 기여하기 때문으로 판단된다. 고속도로 포장에 적용할 수 있는 32mm의 굵은골재 최대치수와 45%의 물-시멘트비를 사용하는 목표 휨강도 45kg/㎠의 적정배합에서는 5.0%까지 플라이애쉬를 치환 가능하고, 50kg/㎠의 적정배합에서는 2.5%까지 치환 가능하다. 공항 포장에 적용할 수 있는 40mm의 굵은골재 최대치수와 37%의 물-시멘트비를 사용하는 목표 휨강도 45kg/㎠의 적정배합에서는 4.5%까지 플라이애쉬를 치환 가능하고, 50kg/㎠의 적정배합에서는 2.0%까지 치환 가능하다. The most of highway in Korea have been paved by concrete since last ten years. The recycling of fly ash in pavement concrete may result in economics, the improvement of concrete quality and the reservation of environment. This paper focused on the series of experiment and statistics analysis with experimental variables such as fly ash substitute ratio, water-cement ratio and maximum size of coarse aggregate in order to investigate the feasibility of recycling of fly ash in pavement concrete, to see the strength characteristics and t propose the optimum mix design based on previous results. The results of experiments and analysis were follows; The fly ash substitute ratio affected most seriously to the flexural strength of concrete among main variables, followed by maximum size of coarse aggregate and water-cement ratio. The interaction between fly ash substitute ratio and coarse aggregate size was the biggest. The optimum mix design was determined by target compressive, which was selected as 6 times of flexural strength. This indicated that the small hydrate of fly ash in concrete filled in effectively and resulted in the enhancement of flexural strength. the optimum mix design for highway pavement concrete with 32mm of maximum size of coarse aggregate and 45% of W/C can incorporate up to 5.0% and 2.5% of fly-ash at 45 kg/cm² and 50 kg/cm² of target flexural strength, respectively. The optimum mix design for airport pavement concrete with 40mm of maximum size of coarse aggregate and 37% of W/C can incorporate up to 4.5% and 2.0% of fly ash at 45 kg/cm² and 50 kg/cm² of target flexural strength, respectively.

치아경조직 부식후 재경화에 관한 실험적 연구

최유진,홍정표,한봉석 慶熙大學校 齒科大學 1989 慶熙齒大論文集 Vol.11 No.-

This study was performed for the purpose of examining the effects of aqueous solution of sodium fluoride on the reminerali7ation and rehardening of human tooth enamel. 16 pairs of permanent first premolars extracted from Korean were tested. Microhardness test and scanning electron microscopy were investigated on sound enamel, initial carious enamel, enamel treated with sodium fluoride after etched with 30% phosphoric acid and initial carious enamel treated with sodium fluoride, respectively. The results obtained were as follows: 1. The microhardness value of sound enamel surface was Hv. 347-391, and the mean was Hv 367.2. 2. The initial carious enamel surface treated with 2% sodium fluoride solution has shown dense appearance in SEM, but the increase of microhardness value was not remarkable. 3. Enamel surface etched with phosphoric acid and then treated with 2% NaF solution was changed to relatively dense structure in SEM, but the microhardness value was only Hv. 238.2. 4. The mean microhardness value was highest in sound enamel (Hv. 367.2) and followed by fluoride solution-treated initial carious enamel (Hv. 293.0), initial carious enamel (Hv. 291.3) and fluoride solution-treated etched enamel (Hv. 238.2) in order. 5. The microhardness value of the substance formed initially on the carious or etched enamel surface by application of 2% NaF solution was very low.

파일럿 플랜트에 의한 음식물 찌꺼기 처리

최성우,류정숙,박정호,임찬섭,박승조 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.1

In this study, using the extinctive composting apparatus, it took a day for the degradation of waste food with high temperature and aerobic condition. It was confirmed by the change of organic ratio, condensed water, and weight. Final production included rare organic ratio so that it was easy to degrade microorganism but it was not enough pH and salt for using compost. During reaction, condensed water was produced about 20 ℓ/day, the eighty percent of waste food was degraded by compositing reaction on the basis of weight, therefore, this means that it is go effective on the volume reduction.

補强 開口部를 갖는 合成보의 擧動에 관한 硏究

崔山鎬,梁永晟,金圭石,金錫中,金弼中 江原大學校 産業技術硏究所 1991 産業技術硏究 Vol.11 No.-

A model for the strenghth of composite beams with reinfforced web openings is presented. All of theh models are based on the static theorem of ultimated strength of reinforced rectangular perforated composite beam and is compared to the test.

Disulfiram으로 인한 급성 뇌증후군 2예

최성학,이정호,오석환 인제대학교 1985 仁濟醫學 Vol.6 No.1

만성 알코올리즘 환자의 치료 방법 중 혐기요법의 하나로 Disulfiram요법을 시행하여 뇌증후군 및 정신병적인 증상을 일으킨 1예와, 금주 목적으로 의사의 지시없이 Disulfiram만을 복용하여 급성 정신증상을 유발한 1예를 치험하였기에 보고한다. It is well known that disulfiram therapy may result in psychosis, organic brain syndrome, and peripheral neuropathy, additional to the wanted effects of the drug. We experienced two cases of psychoses in chronic alcoholisms who had no past history of psychosis: one; organic brain syndrome and psychotic symptoms resulted from the therapy, the other, acute psychotic symptoms resulted from arbitral taking of disulfiram only, aimed to stop drinking. It is said that the symptoms will disappear only by stopping the medication. Therefore, we assume that disulfiram therapy can be effective as the adjunctive therapy only when it is tried by physicians, and that arbitual usage by general population should be restrained.

일부 지하철 근로자들의 교대근무형태에 따른 건강행위 실천정도와 건강증진 프로그램 요구도

최숙경,이강숙,이정운,구정완,박정일 大韓産業醫學會 2003 대한직업환경의학회지 Vol.15 No.1

목적: 지하철 근로자들의 교대 근무형태별 건강관련 특성과 건강행위 실천정도 및 건강증진 프로그램 요구도를 파악하여 직장내 건강증진 프로그램을 계획하는데 활용하고자 한다. 방법: 지하철 업무에 근무하는 남자 직원 789명중 통상근무자 191명, 3조2교대 역무직 187명, 3조2교대 차량직 204명, 8조5교대 승무직 207명을 대상으로 2002년 2월 8일부터 2월 22일까지 설문조사를 실시하였다. 결과: 통상근무가 교대근무보다 연령이 높았으며, 3조2교대 차량직에서는 경제적 수준이 낮다고 느끼는 비율이 다른 군에 비해 높았다. 총 교대근무년수는 8조5교대 승무직이 7년 2개월로 가장 높았다. 직장관련 특성은 근무형태에 따라 통상근무와 교대근무가 많은 차이를 보였으며, 특히 지하에서 근무하고 있는 3조2교대 역무직이 근무환경에 대한 만족도가 가장 낮게 나타났다. 비만정도와 고혈압 및 고콜레스테롤혈증은 통상근무자에서 높았으나, 8조5교대 승무직의 경우, 간장질환과 위장질환이 다른 군에 비해 높게 나타났다. 건강위험행위에서 흡연율과 1일 흡연량이 가장 높은 직종은 3조2교대 역무직이었고, 음주율은 전체적으로 80% 이상의 음주율을 보였으며, 거의 매일 술을 마신다고 응답한 비율은 3조2교대 역무직이 가장 높았다. 규칙적인 식이습관과 아침식사 여부는 3조2교대 역무직에서 82%가 불규칙적이며, 17.7%가 안 먹는다고 응답하였고, 운동횟수도 3조2교대 역무직에서 가장 낮았다. 건강증진행위 실천정도는 운동, 기호품 제한이 네 군 모두에서 선호도가 높았다. 근무형태별 대상자의 건강증진 프로그램 요구도와 참여의도가 가장 높은 프로그램은 운동프로그램이었으며, 스트레스관리, 암 예방 프로그램, 체중조절 프로그램, 금연 프로그램, 당뇨관리 프로그램, 고혈압관리 프로그램, 금주/절주 프로그램 순 이었다. 결론: 교대근무자들의 근무형태에 따라 건강행위의 특성이 달랐으며, 근무형태별 특성에 맞는 종합적이고 체계적인 건강증진 프로그램을 계획하여 접근해야 할 것을 제시하고 있다. Objectives: To determine the health behavior practices and needs for health promotion in shift work pattern in subway workers. Methods: Among 789 male subway workers divided into four groups, 191 day time workers, 187 station service men (3 groups, 2 turns), 204 rolling stock inspectors (3 groups, 2 turns) and 207 train operators (8 groups, 5 turns), we surveyed the health behavior and needs for health promotion by questionnaire. Results: For obesity, blood pressure and total cholesterol, day time workers had the highest levels, while train operators had higher diseases of the liver and stomach than others. The station service men had the highest smoking rate and daily smoking amount. More than 80% of the respondents consumed alcohol, and the drinking amount was highest among the day time workers and the 8/5 shift train operators. Eighty-two percent of the station service men had irregular eating habits and 17.7% did not have any breakfast. In health promotion activities, exercise and restriction of one's favorite(smoking or drinking) were most preferred in the four groups of respondents. The priority of needs and participation for health promotion was exercise programs, followed by stress management, cancer prevention program, weight control program, anti-smoking campaign, high blood pressure control program, and abstinence/moderation in drinking. Conclusion: As the health behavior practices differed relative to shift work patterns, it was suggested that a comprehensive health promotion program according to shift work pattern should be planned and implemented among subway workers.

도로교통소음의 수평·수직적 전달 및 감쇠 특성

최형일,채희정,김연풍,조도호,설동화,정숙경,김정애 조선대학교 생산기술연구소 2007 生産技術硏究 Vol.29 No.1

This study has been conducted to achieve the following objectives: First, in order to understand the horizontal propagation and attenuation characteristics for the road traffic noise, we selected actively developed areas within 100 meters away from the road to measure the level of traffic noise near a road. To measure the noise near a railroad, we selected areas within 100 meters away from the road. In this way, we analyzed the horizontal propagation and attenuation characteristics for the traffic noise occurring in diversified areas. Second, in order to understand the vertical propagation and attenuation characteristics for the road traffic noise, we measured and analyzed the distributional characteristics of vertical sound pressure levels on each floor of multi-storied apartment buildings according to changes of traffic load and types, and the existence or nonexistence of soundproof walls. For the case of the road traffic noise, we also selected we measured and analyzed the different noise levels on each floor of multi-storied apartment buildings from the soundproof wall. The results of Horizontal propagation and attenuation characteristics for the road traffic noise are as follows: In cases of the soundproof wall + raising ground, raising ground, cutting land, and flat land as distance increases, the sound pressure level steadily decreases. The soundproof wall + raising ground has an especially high distance decrease compared to the other areas, and the sound pressure level for the raising ground is higher than that of the cutting land with a measurement of 10.7~12.1dB(A). Vertical propagation and attenuation characteristics for the road traffic noise are as follows: The amount of sound pressure level decrease is 12.6- 14.5dB(A) for first floor when measuring the vertical sound pressure levels at soundproof wall, which indicates a fairly large decrease. At fifth and sixth floor, the amount of decrease is 2.3dB(A), which indicates a small decrease.

청소년의 식이행태 조사 : 서울·양평 두 지역간 비교 The Comparison of Urban and Rural Areas

최준호,안동현,최보율,강윤주,백영석,조연규,고복자,남정현 漢陽大學校 精神健康硏究 1998 精神健康硏究 Vol.17 No.-

정맥내 주사로 인한 정맥염 발생의 다기관 공동 역학 조사 : 서울, 경기도 6개 종합병원을 대상으로:Focused on 6 hospitals in Seoul or Gyonggi-do, Korea

최정실,박은숙,진혜영,정선영,박미라,김정은,김금순 대한병원감염관리학회 2003 의료관련감염관리 Vol.8 No.2