Zinc-Ferrite의 회수율에 대한 연구

李丙晁,朴冕用,李應孝 건국대학교 1973 學術誌 Vol.15 No.1

Zinc-ferrite시료를 100mesh 이하 되게 분말로 만들어 물에 푼 다음 slurry 상태의 시료 1l(Zn, 50g 함유)에 황산을 이론량의 300%되게 3l를 섞은 후 50psi, 5시간, 200℃에서 용융하여 물 3l씩 세 번 씻어 97% 이상의 아연 회수율을 얻었다. The sample of Zine-Ferrite is powdered through minus 100 mesh and mixed with water (Zn, 50g/l in slurry). The slurry of one litre is mixed with sulfuric acid 300% to stoichiometric amount and digested at 200℃ for five hours. Its pressure is 50 psi. The digested Zinc slurry is washed three times with water and the recovery of Zinc is above 97%.

돼지 우리 깔집용 왕겨에서의 Ochratoxin A 검출

이문한,박진봉,박응복,이영재,신광순,박종명,남궁선,조준형,박근식,권택석,이재구 한국수의공중보건학회 1992 예방수의학회지 Vol.16 No.1

운동부하 흰쥐에서 포도당 증합체가 심근 당원에 미치는 영향

이석강,조성현,김용운,박덕일,김종연,장용찬 대한스포츠의학회 1994 대한스포츠의학회지 Vol.12 No.1

운동부하전 섭취한 탄수화물이 운동흰쥐의 심근 및 골격근이 당원량에 미치는 영향을 측정하여 심근과 골격근의 대사적 차이점의 일단을 연구한 본 논문의 결과는 다음과 같다. 심근과 골격근 당원량(mg/ g wet tissue, 이하 단위 동일)은 정상군에서 심근 2.62±0.51로서 골격근의 3.37±0.58보다 낮았다(p<0.01). 심근 당원량은 정상군이 2.62±0.51이었다. 운동 30분에서 대조군은 정상군의 63%수준으로 감소하였으며(p<0.01), 탄수화물섭취군은 정상군의 86 및 90%수준으로 감소하였으나 통계적으로 유의한 차이는 없었다. 탄수화물 섭취군의 당원량은 대조군의 142 및 137%정도로 양군 모두 대조군보다 유의하게(p<0.01) 높았다. 운동 60분에는 대조군은 운동30분의 78%(정상군의 49%)수준으로 감소하였으며(p<0.05) 탄수화물섭취군은 포도당중합체 및 포도당섭취군에서 각각 운동 30분에 비하여 72(p<0.01, 정상군의 62%), 81%정도(p<0.05, 정상군의 73%)로 감소하였다. 포도당 섭취군의 당원량은 대조군의 147% 정도로 대조군보다 유의하게(p<0.01) 높았다. 운동 120분에서 대조군은 운동 60분에 비하여 63%(정상군의 33%) 수준으로 감소하였으며 (p<0.01) 포도당섭취군은 운동 60분의 69%(정상군의 50%)수준으로 유의하게 감소하였으나, 포도당 중합체 섭취군은 차이가 없었다. 탄수화물 섭취군의 당원량은 포도당 중합체 및 포도당섭취군에서 각각 대조군의 202 및 162% 정도로 양군 모두 대조군보다 유의하게(p<0.01)높았다. 골격근 당원량은 정상군이 3.37±0.58 이었다. 운동 30분에서 대조군은 정상군의 69% 수준으로 감소하였으며(p<0.01) 탄수화물섭취군은 포도당 중합체 및 포도당섭취군에서 각각 정상군의 85 및 88% 수준으로 감소하였으나 통계적으로 유의한 차이는 없었다. 탄수화물 섭취군의 당원량은 포도당 중합체 및 포도당섭취군에서 각각 대조군의 125 및 129% 정도로 양군 모두 대조군보다 유의하게(p<0.05) 높았다. 운동 60분에는 대조군은 운동 30분의 77%(정상군의 53%) 수준으로 감소하였으며(p<0.05)탄수화물섭취군은 포도당중합체 및 포도당섭취군에서 각각 30분에 비하여 93(정상군의 80%), 89(정상군의 78%) %정도로 감소하였으나 통계적으로 유의하지는 않았다. 포도당중합체 및 포도당 섭취군의 당원량은 각각 대조군의 152 및 149% 정도로 대조군보다 유의하게 (p<0.001) 많았다. 운동 120분에서 대조군은 운동 60분에 비하여 50%(정상군의 26%) 수준으로 감소하였으며(p<0.001) 포도당 섭취군은 운동 60분의 75%(정상군의 58%)수준으로 유의하게(p<0.05) 감소하였으나 포도당 중합체 섭취군은 대조군의 84%(정상군의 67%)정도로 감소하는 경향을 보였다. 탄수화물 섭취군의 당원량은 포도당 중합체 및 포도당섭취군에서 각각 대조군우ㅢ 255 및 221% 정도로 양군 모두 대조군보다 유의하게(p<0.001) 높았다. 이상의 결과로 미루어 보아 심근과 골격근 간의 생리, 생화학적 특성의 차이에도 불구하고 탄수화물의 섭취후 중등도 정도의 달리기 운동시 근 당원의 함량에 미치는 영향은 정도의 차이는 있으나 같은 경향을 나타내었으며, 골격근에서 심근보다 더 많은 근 당원 절감효과를 나타내었다. 또한 운동전 탄수화물의 섭취시 이러한 근 당원 절감 효과로 장시간의 운동시 심근 및 골격근 당원의 고갈 지연으로 운동수행능력의 증가가 기대되며, 특히 포도당 보다는 포도당 중합체의 섭취시 효과가 더 크리라고 사료된다. The purpose of this study was to investigate the effect of glucose and glucose plymer ingestion on the concentration of the cardiac muscle glycogen at 30, 60 and 12 minutes of the treadmill running in rats. Rats were randomly assinged to normal, control, and carbohydrate groups. Carbohydrate group was divided into glucose, and glucose polymer ingested rats. The experiment was carried out after overnight fasting. Rats were administrated either water (control) of carbohydrates of formulated glucose(6%), and glucose polymer(6%) via polyethylene tube to the stomaach before treadmill run. Exercise was loaded by a treadmill run at the speed of I ㎞/hr for 30, 60, and 120 minutes. The results of experiment were as follows: Glycogen content of the cardiac muscle was lower than that of the skeletal muscle (plantaris) in normal rats. Glycogen content of the cardiac muscle was decreased in proportion to the exercise time compared to normal in control and carbobydrates ingested rats. It decreased in control, glucose, and glucose polymer compared to normal rats in decreasing order at 120 minutes treadmill running (% change of glycogen content of control, glucose, and glucose polymer compared to normal rats were 33, 50, and 63% in the cardiac muscle at 120 minutes of treadmill running respectively). Glycogen content of the skeletal muscle was decreased in proportion to the exercise time compared to normal in control and corbohydrates ingested rats. It decreased in control, glucose, and glucose polymer compared to normal rats in ecreasing order 120 minutes treadmill running(% change of glycogen content of control, glucose, and glucose polymer compared to normal were 26, 58, and 67% in the cardiac muscle at 120 minutes of treadmill running respectively). Change of the glycogen content of the cardiac and the skeletal muscle during treadmill running after glucose and glucose polymer ingestion showed that both muscles had tendency to decrease in proportion to exercise time similarly in control and carbohydrates ingested rats. Decreasing rate of glycogen content of cardiac and skeletal muscles during treadmill running compared to normal in carbohydrates ingested rats was lower than that of control. From these results, it is suggested glycogen content of cardiac and skeletal muscles had tendency to decrease in proportion to exercise time similarly in control and carbohydrate ingested rats. Glycogen content of cardiac and skeletal muscles in carbohydrate singested rats less decreased than that of control during treadmill running compared to normal. Glucose polymer of the carbohydrates ingested rats in considered as the most effective for glycogen sparing according to exercise time in both muscles. Therefore, intake of carbohydrate, especially glucose polymer, before exercise may be increase performance of the prolonged moderate exercise.

까치복의 呈味成分

李應昊,鄭秀烈,趙舜榮,錢重均,車庸準 釜山水産大學校 1983 釜山水産大學 硏究報告 Vol.23 No.1

까치복의 呈味成分에 관한 資料를 얻고자 核酸關聯物質, 유리아미노산, TMAO, TMA, betaine 및 총 creatinine을 分析하였다. 核酸關聯物質 중 IMP가 1.9μmole/g으로서 가장 많았고, 全核酸關聯物質에 대해 39.6%를 차지하였다. 유리아미노산 중 함량이 많은 것은 taurine, lysine, alanine 및 glycine 이고, 이들 네 가지 아미노산이 전유리아미노산의 68.2%를 차지하였다. 총 creatinine�량은 194.5mg/100g으로서 엑스分窒素에 대해 63.4%를 차지하였으며, TMAO 및 betaine 함량은 微量이었다. Omission test 結果 까치복의 呈味成分은 5'-mononucleotides 및 유리아미노산이 주된 구실을 한다는 것을 알았다. Yellowfin puffer, Fugu xanthopterus(Temminck et Schlegel), is one of the most palatable fishes in Korea. However, relatively little is known about the characteristics of its taste. In this study, the taste compounds including nucleotides and their related compounds, free amino acids, trimethylamine oxide, trimethylamine, betaine and total creatinine were analyzed, and their roles in tasting activity were investigated. The amounts of IMP was 1.9 μmole/g, and the ratio of IMP to the total nucleotides and their related compounds was 39.6%. The great portion of free amino acids in the extractives of yellowfin puffer muscle was occupied by taurine, lysine, alanine and glycine in order, and their content was 79.1% of the total free amino acids. Among the organic bases, total creatinine was abundant, and its nitrogen content was 63.4% of total extractive nitrogen. According to the results of the omission test, the main constituents of the characteristic taste of yellowfin puffer could be assumed as free amino acids and 5'-mononucleotides.

특수학급학생의 직업적응훈련 프로그램 적용 효과

조성열,이응수 한국장애인고용촉진공단 고용개발원 2005 장애와 고용 Vol.15 No.2

본 연구는 장애인복지관에서 실시되고 있는 직업적응훈련 프로그램이 특수학급 정신지체학생의 주거 생활기술, 일상생활기술, 학습기술, 직업기술에 어떤 효과를 미치는지를 알아봄으로써 장애청소년에게 체계저인 진로지도를 실시할 수 있고 이를 통해 장애청소년들이 대인관계 및 사회적응능력 향상과 직업을 통한 자조적인 인간으로 성장할 수 있도록 돕고자 하는데 있다. 직업적응훈련 프로그램은 정신지체 학생들에게 일상생활부터 시작하여 자기관리, 취업에 이르기까지 청소년 시기에 요구되는 전환기 프로그램 참여를 통해 사회적응력 향상 및 취업에 대한 동기부여와 현실대처능력 향상의 기회가 되어 일상생활 및 직업적응능력 향상에 효과가 있었다. 현재 일반학교 특수학급에서는 교과과정이 학습위주의 수업으로 진행되고 있어 직업지도 등 성인기를 대비한 전환기 프로그램이 미흡한 실정이며, 특수학급의 환경적인 여건상 실습위주의 기능생활중심 교육이 부족한 교육현실에서 직업적응훈련 프로그램은 정신지체 학생들에게 사회참여 기회를 통한 대인관계 능력 향상과 자신감 형성 및 직업의 필요성을 알게 되고 직업인으로서의 기본적인 자세를 습득할 수 있는 기회를 제공해주는 구체적인 역할을 할 수 있을 것이다. The purpose of this study is to investigate effects of a work adjustment training program provided by a welfare center for students with developmental disabilities in special education classes on house Iiving skills, daily Iife skills, learning skills, and work skills. The study was conducted on ten selected students at moderate level of mental retardation and learninq disability, who are in special education classes of ordinary secondary schools in a city of Boryoung, Chungcheonqnam-do, Korea and participated in a work adjustment training program provided by Chungnam Seotoo Welfare Center for the Disabled from April to December, 2003. The effects of the work adjustment training program were measured before and after the program was applied by Survey of Daily Life and SFAB (Survey of Functional Adaptive Behaviors) among MDS(Macarron-DiaI System) integration-correscondence factor suivey. The results of this study are summarized as follows. Finstly, education both in theory and practice of daily functions, such as self-management, simple cooking and the use of kitchen utensils, was effective for improving house Iiving skills. Secondly, the work adjustment training proqram proved to be effective for improving daily life skills, which are essential to community adjustment. The effectivity of the program is analyzed to be the result of the education emphasizing field trip learning in work adjustment training program and leisure activity program, such as money management, using local facilities, visiting public accommodations, using swimminq pools, visiting cultural sites, using bowling center, and so on. Third, learning skills of some students(subjects) showed small extent of change, compared with other skills. The change varied, according to differences in cognitive function of individuals. In addition, few notable differences were shown in the skill of describing feelings, such as self-expression and self-understanding, and social relations, by using basic vocabulary. Concerning mathematical ability, some improvement was shown in money management, which is indispensable to community adjustment, most possibly thanks to learning of concept of money and dummy store activity. Fourth, the students in special education class, with comparatively Iight mental retardation and learning disability, showed considerable change in training of Iifting things and total physical response, which need power. However they didn't show meaningful differences of improvement in social manners and rule observance. This might be for lack of acceptive behavior in interacting with others accepting directions from others, and in work stability, because they have difficulty in adjusting themselves to new surroundings. In conclusion, the work adjustment training program was effective for improving daily Iife and work adjustment ability, by enqaging mentally retarded students in transition program indispensable in adolescence covering daily Iife self-management, and jon hunting, and so getting them motivated for reality adjustment, job-seeking, and building up of reality tackling ability. The current curriculum for special education class of ordinary secondary schools is focused on class instruction, and so lacks in transition program including work orientation for adult period. In the present situation of special education class where function-oriented education is insufficiently provided, the work adjustment training program can be a good alternative taking an important role of providing mentally retarded students with a good chance of improving interpersonal ability, self-confidence, basic attitude as a career person through social participation practice.

키틴 분해균 Bacillus sp. LJ-25의 분리 및 효소생산 최적화

이정석,주동식,조만기,이응호 동서대학교부설연구소 1997 연구소 논문집 Vol.2 No.-

In order to produce functional chitin oligosaccharides, a chitinolytic becterium was newly screened from the viscera of Korean bony fish, and identified as Bacillus sp. LJ-25. For the production of chitinolytic enzyme, 1.0% nutrient broth and 0.3% colloical chitin was used as nitrogen and carbon source, respectively. The optimal temperature, initial pH and conentration of NaCl for the production of chitinase from Bacillus sp. LJ-25 were 30℃, 6.5-7.0 and 1.0%, rspectively. Chitinolytic activity of Bacillus sp. LJ-25 was increased until the incubation of 168 hours, but after 168 hours, the activity was decreased.

제강전로슬래그를 이용한 하수슬러지 고화체의 미세구조 분석

李基錫,趙珍奎,李昇玟,金應鎬 弘益大學校 科學技術硏究所 1999 科學技術硏究論文集 Vol.10 No.1

The solidifying effect of solidified digested sewage sludge by converter slag was investigated through microscopic analyses including XRD, SEM and EDS. The XRD analysis of the solidified sludge showed that the main solidification products was CSH; in addition, Ca(OH)₂CAH and Ettringite were observed. The microstructure analysis by SEM showed that as the solidification proceeds, needlelike crystals and honeycomb appeared. The analysis of these crystals by EDS confirmed that the main components were Ca, Si etc. This also confirmed the general notion that the cement hydrate products had a solidifying effect.

고혈압과 정상혈압쥐에서의 식이지방 변화에 따른 혈청과 간의 지질대사 동향

조성희,신응남,서미영,이원정 대구효성가톨릭대학교 응용과학연구소 1991 응용과학연구논문집 Vol.1 No.-

혈압에 영향을 주는 식이요인 중에서 섭취지방이 상당히 중요하다는 것은 일찍부터 거론이 되어왔으며, 식이지방 중에서 다불포화지방이 혈압을 낮추는 효과가 있다고 대체적으로 요약할 수 있겠다. 그러나 다불포화지방산의 종류에 따라서도 차이가 지적되고 있으며, 그 중에서 n-6계열의 식물성다불포지방과 n-3계열의 어유 다불포화지방간의 비교가 최근 10년간 많은 연구의 대상이 되어왔고, eicosapentaenoicacid(EPA)와 docosahexaenoic acid(DHA)가 주다불포화지방산이 되는 어유가, 오랫동안 필수지방산으로 중요시해 왔던 식물유의 linolic acid보다 혈압강하작용이 크다는 결과들이 주목을 끌고 있다.

Ruled Surface로 형성된 임펠러 블레이드 전용 CAD/CAM 시스템 개발 Ⅰ : 모델링에 관한 연구 A Study on the Modeling

조현덕,정대일,윤문철,최두선,신보성,이응숙,董玉革 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.6

We have developed the exclusive CAD/CAM system for the machining of impeller blades. This study is about the modeling method for the effective machining of impeller blades formed by ruled surface. As the impeller is consisted of boss part and blade part, the boss is modeled by rotational surface of hub curve on z-axis and the blade is described by ruled-surfaces between hub curve and shroud curve. This modeling process can be carried out on the software developed in this study. And, the developed software can describe the impeller as a solid model through interface with Solid-Works software. The developed software containing the interface method proposed in this study was very effective for impeller modeling.

Ruled Surface로 형성된 임펠러 블레이드 전용 CAD/CAM 시스템 개발 Ⅱ : 5-축 가공에 관한 연구 A Study on the 5-Axis Machining

조현덕,정대일,윤문철,최두선,신보성,이응숙,董玉革 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.3

This study is continuous with the study 1 (A Study on the Modeling) and the sample impeller of this study is defined by the modeling process of the exclusive CAD/CAM system developed in the study I. And, this study describes a method for the 5-axis machining of impeller blades formed by ruled surface. Therefore, the exclusive CAD/CAM system is the software for modeling and machining of impeller blades. By using the machining method suggested in this study, we could manufacture impeller blades on 5-axis CNC machining center and the machined impeller was very agreeable to the designed impeller. Thus, theories proposed in this study can be very useful for the 5-axis machining of impeller blades.