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백남철,서원동 한국고무학회 1978 엘라스토머 및 콤포지트 Vol.13 No.2
The measurement of the infrared absorption spectrum of supporting reinforcing filler which is oltained from the domestic area of Korea, Japan and U.S.A., is used by the method of KBr pellet. As a result of experiment, each absorption fond of the filler had appeared differently, because of each filler is consisted of different chemical composition, different crystalline form, different method of preparation, and the different ways of use etc. According to the above phenomena, each filler seems to have a different characteristic infrared absorption band, We can find what filler is used for sample rubber.
부분마취하 슬관절경 수술 : 장점 및 단점 Advantage and Disadvantage
백남철,정영복,강기서 대한슬관절학회 1992 대한슬관절학회지 Vol.4 No.1
Arthroscopy is a procedure for diagnosing and treating acute and chronic internal derangements of the knee joint, now its roles are more widening because of its advantage high accuracy of diagnosis, shortening of the recovery time. Especially introduction of arthroscopic operation under the local anesthesia was possible to decrease side effects and complication by general anesthesia. We have experienced 369 cases of the intra-articular problems of the knee joint who were treated by arthroscopic operation from April 1989 to May 1991. Among them 165 cases which were treated by arthroscopic operation under local anesthesia were reviewed retrospectively. The results are as follows: 1. The patients ranged in age from 12 years to 83 years and 54 (33 %) patients were in third decade, 110 patients were men and male was affected 2 times more than female. 2. Time from injection of the local anesthetic to start of operation was average 38.6 minutes and consuming time during operatin was average 64.4 minutes. 3. The most common arthroscopic finding was meniscal lesions in 73 cases (medial 28, lateral 45), the next was osteoarthritis in 52 cases, and the third was ligament injury in 33 cases. 4. Under the local anesthesia the most common arthroscopic operation was partial meniscectomy in 58 cases, the next was synovectomy in 22 cases and the third was plica removal in 13 cases. 5. Arthroscopic operation was performed 104 cases in only local anesthetics-bupivacaine 100 mg + lidocaine 400 mg - but for sedation during operation injected demerol and/or valium in 61 cases (37 %). 6. The side effect of local anesthesia during intra or postoperative period were temporal hypotension and bradycardia in 3 cases but recovered soon without sequelae. In conclusion, arthroscopy under the local anesthesia is considered a simple, safe, reliable procedure for patients in whom clinical examination suggests intra-articular disorders of the knee.
백남철,Baek, Nam-Cheol 대한타이어공업협회 1968 타이어 고무 Vol.18 No.-
화학공업사발행인 화학공업지 1968년 1월호에 고무에 대한 기본적인 개념과 아울러 현재 가장 댜량으로 사용되고 있는 합성고무들에 관한 성질, 용도 및 배합례를 소개한 일이 있다. 이번에는 특수한 용도에 사용되는 하이팔론(Hypalon, Chlorosulfonated polyethylene), 티오콜(Thiokol, Polysulfide, Polymers), 실리콘고무(Silicone rubbers) 및 비소고무(Fluorocarbon elastomers)에 대하여 기술하고자 한다.
백남철,허동섭 한국고무학회 1966 엘라스토머 및 콤포지트 Vol.1 No.1
The aging characteristics ofvulcanized rubber products manufactured in Korean industries have been studied, especially in terms of relationship between aging temperature and time, and also the comparison of results between Geer's oven testing and tube testing was made. It was assessed from changes in tensile properties resulting from conditioning at elevated temperatures for specified period of time. Even though the recipe of each sample is different, the results, as would be expected, has shown that at lower aging temperature the change of tensile strengh indicate moderately and at the elovated severely as shown in Figure 9. Consequently, in spite of that the results from conditioning at various temperatures for certain specified period of time must be equivalent to each other, it shows inignorable telerance. The results of Geer's oven test and tube test have shown slightly different value. It seemed to be caused by the result of migration phenomena on aging in Geer's oven.