군화창 및 구두창의 품질향상에 관한 연구

최준철,김종석,허동섭 한국고무학회 1973 엘라스토머 및 콤포지트 Vol.8 No.2

A study of preparing rubber soles and heels was made to improve the quality in their physical properties such as resistance of cut-growth, abrasion resistance and tensile strength. Following results were obtained in the characteristics of rubber compounding: 1. In the reinforcement effect of fillers, it was found that hydrous silcate and carbon black were the best, aluminum and calcium silicate were pretty good, and basic magnesium carbonate was moderate. 2. SBR/BR blend in the ratio of from 85/25 to 100/0 and NBR/BR blend in the ratio of from 60/40 to 20/80 were the most suitable compounding condition.

배측 분쇄가 있는 원위부 요골 관절내 골절의 3가지 수술적 치료 결과 비교: 외고정 기구 단독, 외고정 기구와 동종골이식 및 수장측 잠김 압박 금속판

최준철,나화엽,이영상,김우성,오경수,송우석,김세준,Choi, Joon-Cheol,Na, Hwa-Yeop,Lee, Young-Sang,Kim, Woo-Sung,Oh, Kyung-Soo,Song, Woo-Suk,Kim, Se-Jun 대한정형외과스포츠의학회 2009 대한정형외과스포츠의학회지 Vol.8 No.2

목적: 배측 분쇄가 있는 원위부 요골 골절에서 세가지 수술법에 따른 결과를 알아보고자 하였다. 대상 및 방법: 2006년 4월부터 2009년 5월 사이의 60세 이상의 배측 분쇄가 있는 원위부 요골 골절이 있으면서 불안정성을 보인 환자 49명을 대상으로 하였다. 수술 1년 후까지의 방사선학적 추시관찰을 통하여 골절 정복의 유지 여부 및 Mayo Wrist Score를 통한 임상적 결과를 비교하였으며, 일원배치 분산분석(One-Way ANOVA)을 통하여 연관성을 검정하였다. 결과: 세군 모두에서 수술 직후에는 만족스러운 정복을 얻을 수 있었으나, 추시 소견상 외고정장치 단독으로 고정시에는 외고 정장치에 동종골 이식을 추가한 군 및 수장측 잠김 압박 금속판을 사용한 군에 비해서 유의하게 정복 소실이 있음을 확인하였다.(p<0.05) Mayo Wrist Score는 세군 모두에서 의미있는 차이는 없었다. 결론: 배측 분쇄가 심한 원위부 요골의 관절내 골절에서 외고정 장치만 사용한 치료시에는 해면골 결손으로 인한 정복유지의 어려움이 있어 불충분한 치료로 판단된다. Purpose: To evaluate the outcomes of three different surgical approaches in treating a distal radius fracture with dorsal communition. Materials and Methods: From April, 2006 to May, 2009, 49 patients over age of 60years old with unstable dorsal communition distal radius fracture were analyzed. We compared maintainability of reduction by radiological follow-up observations and clinical outcomes using Mayo wrist scores. One-Way ANOVA test was performed to examine the statistical correlation between the methods. Results: All three approaches provided satisfactory post-op reduction results. However, follow-up observations showed significant loss of reduction in the external fixation only group compared to the added bone graft group and the volar anatomical locking plate group (P<0.05). Mayo wrist score was indifferent between the three groups. Conclusion: Treatment of a distal radius fracture with severe dorsal communition using an external fixation only appears to be insufficient in maintaining reduction of a cancellous bone defect.

Thiazole 류(類)의 노화방지성(老化防止性)에 관(關)하여

최준철,Choi, Jun-Cheol 韓國고무學會 1969 엘라스토머 및 콤포지트 Vol. No.

유기과산화물의 가황특성

최준철 한국고무학회 1978 엘라스토머 및 콤포지트 Vol.13 No.1

수평선회운동장에서의 고체-고체입자 선별기술

최준철 한국자원공학회 2003 한국자원공학회지 Vol.40 No.5

Mass production and mass consumption generate massive quantities of industrial scrap as well as post consumer wastes. This may give rise to serious environmental trouble due to harmful metals and the exhaustion of resources by the loss of valuable metals in the near future. Resources supply and environmental production are increasingly becoming matters of global concern. Establishment of social systems for waste zero emission and promotion of re-use as well as of technology for improving recycling efficiencies are needed for sustainable development. The new technology is expected to reduce the energy consumption and environmental burden caused by the treatment of by-product. There has recently been a growing interest in the separation of mixture based on the segregation that takes place in handling in a mixture containing solid particles of different properties. In this article, solid-solid separation technology using segregation of solid mixture in horizontally circular bed is briefly discussed. 현재, 제품의 대량생산 대량소비로 인해 막대한 자원이 개발되어 사용되고 있으며 가까운 장래에 자원의 부족화가 예상된다. 또한, 대량소비로 인해 대량의 폐기물이 발생되고 있으며, 이러한 폐기물의 부적정처리에 의한 환경오염과 소각 및 매립에 의한 환경부담이 지구차원의 문제로 대두되어 자원보존 및 환경보호를 위해 제로에미션(zero emission)의 자원순환형사회로의 전환이 모색되고 있다. 이를 위해 재사용되지 않고 버려지는 폐기물의 고효율 리싸이클링기술개발이 선진국을 중심으로 활발히 진행되고 있다. 본 고에서는 환경부하를 극소화하고 운영비용을 최소화할 수 있는 물리적 선별기술 중 최근 기술개발이 진행중인 수평선회진동장에서 비중이 서로 다른 고체입자들간에 발생되는 편석을 이용한 고체-고체분리기술과 그 활용예에 관하여 소개하고자 한다.

폴리부타디엔 고무의 공업화에 따른 재조건

최준철 한국고무학회 1978 엘라스토머 및 콤포지트 Vol.13 No.2

응급실로 내원한 패혈증 환자에서 프로칼시토닌과 Abbreviated Mortality in Emergency Department Sepsis 점수체계의 예후 예측도구로서의 유용성

최준철,김양원,윤유상,김미란 대한응급의학회 2011 大韓應急醫學會誌 Vol.22 No.1

Purpose: Procalcitonin (PCT) is a newly introduced marker of systemic bacterial infection. The MEDS (Mortality in Emergency Department Sepsis) scoring system has proven to be the most useful and appropriate clinical prediction tool in cases of systemic bacterial infection in the emergency department. There have been no studies comparing the PCT assay with the abbreviated MEDS scoring system (without neutrophil bands). This study aimed to determine the efficacy of quantitative PCT assay and the abbreviated MEDS score in predicting the 28-day mortality and intensive care unit (ICU) admission in emergency department patients with systemic inflammatory response syndrome (SIRS). Methods: This study was carried out prospectively on 212patients >18-years-of-age with the criteria of SIRS who had visited to the emergency department. They were included if they had an emergency department diagnosis of sepsis,two or more SIRS criteria. We checked the initial PCT concentration and calculated abbreviated MEDS score. The primary outcome was 28-day mortality and ICU admission. We evaluated the predictive abilities of the initial PCT assay and abbreviated MEDS score. Receiver operating characteristic (ROC) curves were used to identify the value of PCT and abbreviated MEDS scoring system that maximized the sum sensitivity and specificity. Results: Among the 212 patients included in this study, the mortality rate was 21%(45 of 212 patients) and the ICU admission rate was 33%(70 of 212 patients). Non-survivor group had a significantly higher PCT concentration (median,interquartile range (IQR), 12.23 ng/mL, 2.33-39.77 vs. 0.58 ng/mL, 0.10-3.60, p=0.05) and a higher abbreviated MEDS score (12.62±4.33 vs. 5.53±3.57, p<0.05) than the survival group. ICU admission patients had a significantly higher PCT concentration (median, IQR, 7.75 ng/mL, 1.43-36.85 vs. 0.55 ng/mL, 0.08-3.03 p<0.05) and a higher abbreviated MEDS score (10.90±4.60 vs. 5.13±3.48,p<0.05) than general ward admission patients. ROC analysis showed the discriminative power of the abbreviated MEDS score and PCT assay in predicting ICU admission and 28-day mortality. For ICU admission, areas of under the curves (AUC) of abbreviated MEDS score and PCT were 0.842 and 0.749, respectively (p<0.05). For PCT,AUC of abbreviated MEDS and PCT were 0.888 and 0.784, respectively (p<0.05). The optimal PCT threshold in predicting ICU admission was 1.22 ng/mL (odds ratio (OR),6.92; 95% confidence interval (CI), 3.51-13.63; p<0.05) and 1.90 ng/mL in predicting 28-day mortality (OR, 11.90; 95%CI, 4.76-29.74). The optimal threshold of abbreviated MEDS score in predicting ICU admission was 8 (OR, 10.95;95% CI, 5.47-21.90; p<0.05) and 9 in predicting 28 day mortality (OR, 19.03; 95% CI, 8.28-43.78; p<0.05). Conclusion: Both abbreviated MEDS scoring system and single plasma PCT assays can be used as a useful marker in rapidly and accurately predicting poor prognosis in emergency department patients with sepsis.

음식품질향상을 위한 조리용 와인교육 연구: 서울 소재 특1급 호텔의 조리사들을 중심으로

최준철,차석빈 한국외식경영학회 2010 외식경영연구 Vol.13 No.3

Surveying 282 chefs of super deluxe hotels in Seoul, this study investigated the current status of wine training for chefs and how they felt about the cooking wine training. Research findings show that wine training for chefs was done irregularly and after work, leaving room for improvement. Chefs felt highly the necessity of cooking wine training for the improvement of food quality and the systematic cooking wine training. Finally, statistical differences between cooking wine-related variables and demographic characteristics were found in education level, age, position, and length of career. The study concludes with the implications of the results and future research topics.

천연고무용의 새로운 디우레탄계 가황제의 합성과 특성

최준철 한국고무학회 1978 엘라스토머 및 콤포지트 Vol.13 No.3

고관절 주취 석회화 건염의 치료

최준철,김영호,나화엽,심동준,최준원,이상호,이상민,하두회,김성권 대한고관절학회 2005 Hip and Pelvis Vol.17 No.2

Purpose: The clinical symptoms of calcific tendinitis around the hip joint were reviewed, and the effect of oral nonsteroidal anti-inflammatory agents compared with that of a mixed injection of corticosteroid and local anesthetics as conservative treatments. Materials and Methods: Nine cases were retrospectively reviewed in this study. Magnetic resonance imaging was performed in seven cases. One case was treated with surgical excision, four with oral nonsteroidal anti-inflammatory agents and four with the mixed injection of corticosteroid and local anesthetics. Results: The four cases treated with the mixed injection of corticosteroid and local anesthetics had immediate relief of pain, but the four treated with the nonsteroidal anti-inflammatory agents took more than 2 weeks to achieve pain relief. There was no recurrence in any of the cases. Conclusions: Dramatic relief of pain was noted in all cases treated with the mixed injection of corticosteroid and local anesthetics. 목적: 고관절 주위 석회화 건염의 임상 양상과 보존적 치료 방법중 비스테로이드 소염제 경구 투여와 부신피질 호르몬과 국소 마취제의 혼합 주사 치료 효과에 대해 비교 연구 하였다. 대상 및 방법: 고관절 주위 석회화 건염으로 치료 받았던 9례에 대하여 후향적 분석을 하였으며, 7례에서 자기 공명 영상을 시행하였다. 치료 방법은 수술적 제거 1례, 비스테로이드 소염제 경구 투여 4례, 부신피질 호르몬과 국소 마취제를 혼합 주사 치료한 경우가 4례였다. 결과: 비스테로이드 소염제 경구 투여로 치료한 4례에서 증상 소실에 필요한 시간은 2주 이상(2주-6개월)이 소요된 반면 부신피질 호르몬과 국소 마취제를 혼합 주사한 4례 및 수술적 제거를 시행한 1례에서는 즉각적인 증상 호전이 나타났다.모든 예에서 재발은 없었다. 결론: 고관절 주위의 통증이 심한 경우 석회화 건염을 의심해야 하며, 부신피질 호르몬과 국소 마취제의 혼합 주사 치료도 좋은 치료 방법으로 사료된다.