소형 Gun Drill Machine 개발에 관한 연구

오진수,박광훈,남궁재관,우창기,강동명 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-

This compact Gun Drilling Machine was developed to improve productivity and economical efficiency for small and midium enterprise tool makers. To produce specialize tools that gun drilling works should be required prior to making deep holes. Gun drill machines are so expensive and big burden for small tool makers so that works used to execute through outside orders but it was required lot of cost too. Most of gun drill machines are providing for high volume and large capacity enterprises. In order to support for small and medium enterprise purpose that compact gun drill machine was designed and developed. It could be improved products quality, productivity and saving manufacturing cost using this machine.

정어리 냉동고기풀의 품질개선에 관한 연구

오광수,문수경,이응호,김복규 國立統營水産專門大學 附設 水産科學硏究所 1994 수산과학연구소보고 Vol.5 No.-

정어리 냉동고기풀의 최적 가공조건은 원료 정어리를 알칼리 염수수세한 후 정어리 육에 대해 분리 대두단백질:물:정제 정어리유(1:5:2.6)로 만든 유화커드를 20%, 솔비톨 4%, 설탕 4%, 중합인산염 0.2% 및 항산화제로서 에리소르빈산나트륨을 0.1% 첨가하여 고기갈이한 후 -35℃에서 급속동결시켜 carbon box로 포장하여 동결저장한 제품이 가장 좋았다. 본 제품의 수분 함량은 73.3%. 조단백질 15.0%, 조지방은 6.9%였으며, 생균수는 1.6~l.8X10^4/g으로 동결저장 중 변화는 거의 없었다. 제품의 주요 구성지방산은 16:0, 16:1, 18:1, 20:5 및 22:6 등으로 고도 불포화지방산이 47.7% 함유되어 있었다. 동결저장 중 120일 동안 제품의 물성, 지질산화 및 지방산의 변화 등을 측정한 결과, 유화커드와 에리소르빈산나트륨을 첨가함으로서 동결저장 중 단백질 변성, 지질의 산화 및 변색을 효율적으로 억제 시킬 수 있었으며, 품질이 안정하게 유지되었다. 한편, 본 시제품과 명태 냉동고기풀을 혼합하여 가공한 어묵의 품질을 측정한 결과, 어묵의 품질에 큰 저하됨이 없이 명태 고기풀을 본 정어리 고기풀로 40%까지 대체할 수 있었으며 어육의 풍미를 갖는 연제품을 가공할 수 있다는 결론을 얻었다. The processing conditions and quality of sardine surimi were examined: Raw sardine meat was separated, washed in 0.2% NaHC0_3 and 0.15% NaCl solution, and then dewatered by centrifuge. The dewatered sardine meat was chopped, mixed with 20% emulsion curd (soybean protein : water : refined sardine oil= 1 : 5. 2.6), 4% sorbitol, 4% sucrose, 0.2% polyphosphate and 0.1% sodium erythorbate by stone mortar. The mixed sardine meat was frozen with contact freezer, packed in carton box and then stored at -25±2℃. The moisture, crude protein and lipid contents of the sardine surimi product was 73.3%, 15.0% and 6.9%, respectively. Fatty acid composition of product consisted of 28.8% of saturates, 24.3% of monoenes and 47.7% of polyenes and the major fatty acids were 16:0, 20 5, 18:1, 22:6 and 16:1. The results of changes in POV, TBA value, fatty acids, texture and sensory score of products during frozen storage showed that lipid oxidation and freeze denaturation of product could be retarded, and flavor enhanced by addition 20% emulsion curd and 0.1% sodium erythorbate. In an attempt to apply sardine surimi in producing surimi-based product, it was concluded that Pollack surimi could be substituted with sardine surimi up to 40% without showing any significant changes in texture and taste of surimi-based product.

신생아경련의 임상적 고찰 및 예후인자에 관한 연구

오광수 圓光大學校 醫科學硏究所 1998 圓光醫科學 Vol.14 No.2

Background: The convulsive phenomena are the most frequent of the overt manifestations of neonatal neurological disorders. It is very important to recognize neonatal seizures, to determine their etiology and to treat them for several reasons, such as seizure may be cause brain injury. The Purpose of this study is to help adequate treatment and predict prognosis by analysing clinical manifestations and factors related neonatal seizures. Methods: Retrospective reviews were made on 65 cases of neonatal seizure who were admitted to the Department of Pediatrics, Wonkwang University School of Medicine from January 1995 to May 1998. The most valuable contributing factors among etiology, type of seizure, age of onset, sex, EEC findings for predicting the prognosis were assessed by using soft program of the SSPS/PC+ Discriminant analysis. Results: 1) The most frequent causes of neonatal seizure was hypocalcemia(33.9%), and followed by hypoxic-ischemic encephalopathy(18.5%), hyponatremia(6.2%), unknown(9.2%), benign neonatal convulsion(4.6%), hypoglycemia(3.1%), intracerebral hemorrhage(1.5%), in order of frequency. 2) The time of onset of neonatal seizure was within 24 hours of postnatal age in 22 cases(33.8%), on 2nd and 3rd days in 24 cases(36.9%), 4th and 7th days 12 cases(18.5%). 3) The types of neonatal seizure were multifocal clonic(63.1%), subtle(16.9%), generalized tonic(10.8%), focal tonic(4.6%), focal clonic(3.1%), and myoclonic(1.5%) in order of frequency. 4) The Brain magnetic resonance imaging (MRI) was performed in 31 cases. Abnormal MRI findings were found in 17 (54.8%) and were subcortical hyperintensity and subdural hemorrhage in 4 cases, respectively, periventricular leukomalacia in 3 cases, status marmoratus in 2 cases, periventricular ischemia in 2 cases, and intraventricular hemorrhage and intracerebral hemorrhage in one case, respectively. 5) The electroencephalography(EEG) was done in 34 cases, and showed abnormal findings in 7 cases(20.6%). multifocal clonic and generalized tonic seizure were associated with abnormal EEC in 25.0% and 40%, respectively. 6) The follow-up examination were made on 56 patients(86.2%) during the period from 9 days to 17 months. 2 cases in hypoxic-ischemic encephalopathy 7 patients revealed cerebral palsy, and 1 case in hypocalcemia patient showed continous seizure disorder. Conclusion: The most valuable prognostic factors among EEC findings, onset of seizure, sex, type of seizure, and etiology is EEC findings(P=0.0023).

통조림용 가다랑어육의 식품성분

오광수,김정균,김인수,이응호,김복규 國立統營水産專門大學 附設 水産科學硏究所 1990 수산과학연구소보고 Vol.2 No.-

가다랑어 혈합육을 보다 효율적으로 이용하기 위한 일련의 기초연구로서, 가다랑어 혈합육의 지질성분, 함질소엑스분 및 구성아미노산 등을 보통 육과 함께 분석하여 비교, 검토하였다. 보통육은 혈합육에 비해 수분, 조단백질 함량은 약간 많은 반면, 조지방과 회분 함량은 혈합육이 약간 많았다. 휘발성염기질소량은 보토육이 22.7mg/100g, 혈합육이 46.9mg/100ㅎ으로 혈합육이 보통육에 비해 선도저하가 훨씬 빨랐다. 보통육과 혈합육의 총지질 조성은 각각 중성지질 79.7%, 71.9%, 당지질, 6.8%, 9.5%, 인지질13.5%, 18.6%로 이루어져 있었다. 중성지질의 성분은 free fatty acid ac triglyceride, 인지질은 phosphatidyl ethanolamine, phosphatidyl, 인지질은 phosphatidyl choline이 주성분이었고, lysogud 인지질의축적도 확인되었다. 총지지르 중성, 당 및 인지질의 축적도 확인되었다. 종지질, 중성, 당 및 인지질의 지반산 조성에서 보통육은 16:0 및 18:1을 주체로 한 포화산 및 모노엔산의 조성비가 혈합육보다 높았으며, 혈합육은 폴리엔산, 특히 22:6의 비율이 월등히 높았다. 16:0. 18:0, 18:1, 20:5 및 22:6 등이 주요 구성지방산이었다. 유리아미노산의 조성은 총함량에서 보통육 쪽이 많았고, 보통육에는 histidine, 혈합육에는 tauring의 보통육에서는 680.9mg.100g 정도 전존해 있었으나, 혈합육에서는 IMP의 분해가 급속히 진행되어 73.1mg/100g에 지나지 않았다. TMAO 및 TMA는 보통육에 비해 혈합육에 휠씬 많이 함유되어 있었고, total creatinine은 보통육 쪽이 많았다. 구성아미노산의 조성은 양시료 간에 별차이가 없었고, glutamic acid, aspartic acid, lysine, leucine, alanine, isoleucine 및 arginine 등이 주요 구성아니노산이었다. The lipid components, nitrogenous extracts and amino acids of dark muscle(DM) of skipjack (Katsuwonus pelamis) were analyzed and compared with those of white muscle(WM). WM was higher in moisture and crude protein content, and lower in crude lipid and ash content than those of DM. Contents of volatile basic nitrogen in WM and DM were 22.7mg/100g and 46.9mg/100g. Total lipid(TL) of WM and DM consisted of 79.7%, 71.9% neutral lipid(NL), 6.8%, 9.5% glycolipid(GL), and 13.5%, 18.6% phospholipid(PL), respectively. NL was mainly composed of free fatty acid, triglyceride, and PL was mainly occupied by phosphatidyl ethanolamine, phosphatidyl choline. Also lysophosphatidyl choline and lysophosphatidyl ethanolamine were identified in PL. In fatty acid composition of TL, NL, GL and PL, WM revealed higher contents in saturates and monoenes such as 16 : 0, 18 : 1, while DM showed higher contents in polyenes such as 22 : 6 especially. The major fatty acids of these samples were generally 16 : 0, 18 : 0, 18 : 1, 20 : 5 and 22 : 6. Contents of total free amino acids from WM and DM were 5,982.3mg/100g and 4,450.7mg/100g (dry base). Of free amino acids, Tau concentration was much higher in DM than in WM, Ala, Gly, Met, Arg, Thr were also high in DM. But His was much higher in concentration in WM. Content of inosinic acid(IMP) in WM(680.9mg/100g) was higher than that of DM(73.1mg/100g). The degradations of IMP proceeded very rapidly in DM. DM contained much higher trimethylamine oxide and trimethylamine than those of WM. The profile of combined amino acids in these samples were very similar, and main amino acids were Glu, Asp, Lys, Ala, Ile and Arg.

지체 부자유인의 스포츠 센타 이용이 생활체육 만족도에 미치는 영향

오광진,김의수 師範大學 體育硏究所 1997 서울大學校 體育硏究所論集 Vol.18 No.2

This study investigated the perception and satisfaction of facilities, leaders, and activity programs among the physically handicapped. Specially, the focus of the study was to examine the relationship between the use of sport centers (e.g., frequency, duration) and the users' satisfaction of participating in the program. The subjects of this investigation were 102 person with orthopedic disabilities, (52 male, 50 female) living at K and S city utilizing sport centers for the disabled. For this survey, 19 questions concerning sport facilities, 12 questions concerning instructors and 10 questions concerning programs were selected. These questions were based on the questionnaire by Han, Woojin (1994). These questions were made into 5 Likert Scale Questions. The survey was made into two parts. First, eight questions on various circumstances of the subjects, such as sex, age, occupation, educational background, monthly salary, frequency of facility utilization, and duration of facility utilization. Second, the degree of satisfaction at the facilities (main facilities, direct auxiliary facilities, indirect auxiliary facilities and athletic instruments), instructors (traits of instructor, teaching abilities and teaching methods) and programs (operation of programs and effects of programs) for the disabled at the facilities in which one participates were prepared into 41 questions rated on a Likert scale of 1 to 5, with 1 representing dissatisfaction and 5 representing satisfaction. For the survey, partially or incompletely answered questionnaires were excluded. Only sincerely answered questionnaires were used and coded for statistical treatment, Regression utilizing SPSS/PC" package. The results indicated that occupation, education, and monthly salary of the users contributed significantly to the satisfaction of participating in "sports for all" activities. In addition, only the frequency of use was found to be a significant variable predicting the users' satisfaction.

DNA 분석법에 의한 한우고기 판별

오홍록,이창수,상병찬,송광택 충남대학교 농업과학연구소 2006 농업과학연구 Vol.33 No.1

This study was deal with the development of breed-specific DNA marker which is able to identify Hanwoo and European cattle breeds(Non-Hanwoo) meat. Genetic differentiation between Korean cattle(Hanwoo) and European cattle breeds was examined by Random Amplified Polymorphic DNA(RAPD) analysis. The RAPD patterns were identical among Non-Hanwoo, such as Holstein, Hereford. Aberdeen Angus. Brown Swiss. Limousin or Simmental. but the above pattern was different from that of Hanwoo. All bands detected in the Hanwoo samples were observed in Non-Hanwoo cattle samples, but one of the common bands found in samples was not detected in the Hanwoo samples. The band(1.4kb) may be useful as a marker for identifying a meat of Hanwoo from imported cattle meat. Actually, the detection of the DNA marker was tested by DNA analysis with 929 samples which were prepared from bloods of 673 Hanwoo cattles and 141 Holstein cattles, from 115 imported cattle meats. The DNA marker was absent in 644 of 673 Hanwoo cattles (96%) but present in 245 of 256 Non-Hanwoo cattles (95%). These results show that the DNA marker is effective to characterize Hanwoo and Non-Hanwoo meat by its detection. This DNA marker, however, was not useful in detecting unwanted crossbreeding between two cattle breeds, because the band pattern in hybrid cattle shows one of two band patterns in Hanwoo and Non-Hanwoo.

측두엽 간질 실험동물 모델의 치상회 과립세포에서 GABA_(A) 수용체의 변화

오광수 全南大醫大 2000 전남의대학술지 Vol.36 No.1

반복성 복통 환아의 임상적 고찰

오만택,오광수 圓光大學校 醫科學硏究所 1998 圓光醫科學 Vol.14 No.2

This study attempted to analysis clinical and diagnostic characteristics of 61 patients with recurrent abdominal pain(RAP) in children, from January, 1992 to July, 1997 at the department of Pediatrics, Wonkwang University hospital. The result were summarized as follows : 1) Sixty-one children ranging in age from 2 to 15 years was examined. It showed more frequently in girls than in boys(M:F=2:3) and showed 10 to 15 years of age in 38(62.4%), 5 to 15 years of age in 18(29.5%), below 5 years of age in 5(8.2%). The peak age was 11 to 15 years of age. 2) The pain was predominantly epigastric in 24(39.3%), periumbilicus 13(21.3%), right lower abdomen 6(9.8%), and left lower abdomen in 6(9.8%) in order of frequency. 3) Additional complaints, e.g, vomiting 16(26.2%), headache 9(14.7%), constipation 8(13.1%), occurred at or between the episodes of abdominal pain. 4) Upper gastrointestinal endoscopy was performed in 47 of 61 children with RAP, showed acute gastritis in 19(40.4%), duodenitis in 6(12.8%), gastric ulcer in 3(6.4%), duodenal ulcer 2(4.3%), and chronic superficial gastritis and esophagitis in 1(2.3%), respectively. 5) Helicobacter pylori infection was revealed in 3(33.3%) of 9 children who performed rapid urease test(CLO test). 6) Of the 20 patients who examined with upper gastrointestinal barium(UGI) study and upper gastrointerstinal(UGI) endoscopy, 11(55%) had normal finding in both of two studies, 6(30%) with normal findings in UGI barium study were found to erosive gastritis in UGI endoscopy, and 3 with duodenitis, gastric ulcer, and chronic superficial gastritis were found to gastroduodenitis, chronic superficial gastritis, and acute hemorrhagic gastritis in UGI endoscopy, respectively.

레토르트 살균처리가 적색육 및 백색육 어류의 성분변화에 미치는 영향 : 2. 지질성분의 변화 2. Changes in Lipid Components

오광수,김정균,김인수,이응호 國立統營水産專門大學 附設 水産科學硏究所 1993 수산과학연구소보고 Vol.4 No.-

전보에 이어 어육을 원료로 하여 보다 품질이 우수한 고온가열처리 식품을 개발하기 위한 기초 자료를 얻을 목적으로, 시료 어육을 121.1℃에서 Fo값을 5, 10, 20으로 달리하여 가열처리 했을 때 지질성분의 변화에 미치는 영향에 대하여 비교, 검토하였다. 시료 가다랑어육 및 명태육의 TBA값과 과산화물값은 가열처리에 따라 현저히 감소하였고, 감소폭은 가다랑어육 쪽이 컸다. 카르보닐값은 가열처리 중 가다랑어육은 감소하는 반면, 명태육은 증가하였다. 색조는 양 시료 모두 가열처리 정도가 커질수록 육색이 진해졌으며, 특히 가다랑어육에서 갈변진행이 현저하였다. 지질성분은 가다랑어육에는 NL의 함량이 많았고, 명태는 PL의 함량이 많았다. 98℃의 열처리에서는 양 시료 모두 NL과 PL의 조성비에 변화가 거의 없었으나, 121.1℃ 열처리에서는 Fo값 증가할수록 NL의 조성비는 높아지고 PL의 조성비는 낮아지는 경향을 나타내었다. TL, NL 및 PL의 지방 산조성은 98℃ 열처리에서는 양 시료 모두 조성비의 변화가 거의 없었으나, 121.1℃ 열처리에서는 Fo값이 증가할수록 폴리엔산의 조성비가 점차 감소했으며,특히 22:6의 감소폭이 컸다. 반면,포화산 및 모노엔산의 조성비는 증가하였다. 지방산 조성의 변화폭은 명태육 쪽이 가다랑어육에 비해 다소 컸다. Fo 20의 열처리에서 TL의 고도불포화지방산의 잔존율은 생시료에 비해 가다랑어육이 73%, 명태육이 65%였다. In present paper, we investigated the changes in lipid components of skipjack and Alaska pollack meat by thermal processing at high temperature. TBA values and peroxide values of both fish meats decreased markedly by heat treatment: decreasing range of TBA and peroxide values in skipjack meat was larger than those of Alaska pollack meat. Also carbonyl value of skipjack meat was decreased by thermal processing, contrary, that of Alaska pollack meat was increased. Total lipid(TL) of skipjack and Alaska pollack meat consisted of 61.9% , 49.6% non-polar lipid(NL), 38.1% , 50.4% polar lipid(PL), respectively. When the samples were heated at the Fo values of 5 or higher, contents of NL were increased, while that of PL were decreased. In fatty acid composition of NL and PL in both fishes, NL revealed higher contents in saturates and monoenes such as 16:0, 18:1, while PL showed higher contents in polyenes such as 20:5, 22:6; percentages of polyenes such as 22:6 especial1y in both fishes decreased with increasing of Fo values. The remaining ratio of PUFA(20:5+22:6/16:0) of Fo 20 samples in skipjack and Alaska pollack meat were 73% and 65% , respectively. However, when the samples were heated at 98℃ for 30 minutes, no appreciable changes occured in fatty acid composition of TL, NL and PL in both fish meats examined.

4-성분 Silicate 용융체의 열역학적 모델링에 의한 고체 분율 예측

오명숙,이광수 弘益大學校 科學技術硏究所 1996 科學技術硏究論文集 Vol.7 No.1

가스화 공정에서 Slag의 흐름은 Slag 성분과 온도에 영향을 받는다. 이 Slag에서의 결정체 형성은 Slag의 점도를 높여 주어 Slag의 원활한 흐름을 방해한다. 결정체 형성이 Slag 점도에 미치는 영향을 이해하기 위해서는 각 온도에서 Slag안의 결정체 분율 측정할 수 있어야 한다. 본 연구는 가스화 공정의 주원료로 쓰이는 석탄의 성분을 SiO₂, Al₂O₃, FeO, CaO의 네 성분으로 단순화하여, 이 네 성분이 이루는 Melt에서의 결정체 형성을 열역학적 평형 계산에 의하여 예측함을 목적으로 하였다. 4-성분 Melt의 열역학적 성질을 계산하기 위하여 Blander와 Pelten의 Stoichiometric 방법과 Hastie와 Bonnell의 Speciation방법을 비교하여, 이중 다성분계의 평형 예측에 유리한 Speciation 방법을 선택하였다. Speciation 방법의 정확도는 Melt species의 적절한 선택과 그 species의 열역학적 data의 정확도에 큰 영향을 받는다. Anorthite이나 mullite과 같은 복합체의 액상 data는 Hastie and Bonnell이 제안한 근사값외에는 구할 수 없었다. 단순 산화물 중에서도 SiO₂의 경우에는 data source간의 약간의 차이가 있었는데 이 차이가 녹는점을 큰 폭으로 변화시켰다. Hastie와 Bonnell의 Speciation방법을 시험하기 위하여, SiO₂-Al₂O₃이 성분계의 평형 계산 결과를 실험적으로 측정된 상평형도와 비교하였다. 열역학적 data가 평형 계산 미치는 영향을 알아보기 위하여 세 source에서 추출된 SiO₂(s) data로 계산을 반복하였다. SiO₂(s) data 어느 것도 상평형도의 Eutectic Point의 조성 및 SiO₂(l)와 mullite(s)의 계에서 SiO₂(s) 와 mullite(s)계로의 전환온도를 정확히 예측하지 않았다. 또한 mullite(l)를 melt에 포함시키는 경우의 예측된 상평형도는 정확도가 감소하였다. SiO₂-Al₂O₃-CaO의 3-성분계와 SiO₂-Al₂O₃-CaO-FeO의 4-성분계의 계산도 예측된 결정체 형성온도 및 결정체 분율이 상평형도보다 낮은 값을 보여주어 전체적으로 예측된 Melt species 활성도가 낮음을 보여주었다. Hastie와 Bonnell 방법을 활용하기 위하여는 anorthite(l)과 mullite(l)같은 액상 복합체의 열역학 Data가 조정되어야 한다. Slag안의 결정체 분율 예측은 3-성분계 상평형도를 활용하는 것이 가장 정확함을 보여 주었다. 이는 Slag의 성분 중 3개의 주성분을 다시 100%로 조정하여, 3-성분계 상평형도에서 결정체 형성 경로를 따라 각 온도에서 결정체 분율을 계산하는 방법이다.