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들깨(Perilla ocimoides L .) 종자의 단백질 분리에 따른 Phytate 와 질소의 용해도
이재하,윤형식 한국농화학회 1989 Applied Biological Chemistry (Appl Biol Chem) Vol.32 No.4
Nitrogen and phytate solubility of perilla seed flour were influenced by the following factors: pH, centrifugal force, temperature and the presence of salt. The nitrogen solubility of perilla seed flour was minimum(17.1∼18.0%) at the pH range of 4.0∼5.0 and maximum(92.3%) at pH 11.0, while phytate solubility was the highest(48.5%) at pH 4.8 and lowest(8.3%) at pH 11.0. The phytic acid content in the extract decreased with an increase in centrifugal force. However, the nitrogen content was not affected by centrifugal force. The solubility of nitrogen and phytate gradually increased as the temperature was increased from 5℃ to 60℃ The addition of calcium(0∼50mM) at pH 5.0 decreased the phytate solubility, but increased nitrogen solubility. The solubility of nitrogen and phytate of perilla seed protein isolate was gradually increased as pH raised further. The protein and phytate contents of the perilla seed protein isolate were 1.1 and 89.6%, respectively, compared to 5.0 and 60.1% for perilla seed flour.
이재하 남서울대학교 2001 남서울대학교 논문집 Vol.7 No.-
A nation's technology policy is based on the broad principles that govern the allocation of its technological resources. But the cost of inadequate investments in technology development is particularly high in today's globally-competitive environment where continued where continued technological advancements are critical to sustain. This paper presents a methodology for searching the new and /or advanced technologies to promote Korea's technological and economic competitiveness by industrial technology policy. The conceptual framework of industrial technology development, which is the main focus of this paper, was designed using both Top-down and Bottom-up approach. And the technology classification system was modified reviewing its previous system. The technology supported by the government is categorized as the three key technology : proprietary technology, generic technology, infra-technology. The conditions essential for survival in advanced economical situations will admittedly depend upon technology-based strategies that emphasize the integration of these category of industrial technology.
주차안전시설물 중소제조기업의 품질경영 만족수준이 재 구매 및 타인 추천에 미치는 영향에 관한 연구
이재하,김인숙 남서울대학교 2005 남서울대학교 논문집 Vol.11 No.1
The purpose of this study is to examine the relationship between quality management satisfaction and product repurchasing and recommendation in small sized manufacturing industry which produce parking safety products. The categories for quality management satisfaction level are classified into product management, order disposal and quick delivery, and the extend of communication between manufacturer and buyer. The major findings of this study are as follows enterprise. 1) It has a positive relationship statistically significant between the quality management level and product repurchasing or product recommendation to another buyers. 2) The level of quality management & control and order disposal and quick delivery of parking safety product industry is not high. 3) Product repurchasing and recommendation were more affected by the extend of communication than the product management and order disposal and quick delivery. 4) It has a positive relationship statistically significant between product re-purchasing and recommendation. Concurrently, the results of this study will be useful guidelines for QMS framework in medium and small-sized parking safety product
이재하 남서울대학교 경영연구센타 2003 경영연구 Vol.5 No.-
This paper investigates empirically the reasons for changing their job from enterprise research institute to University. This paper is focused on the finding motivations to absorb their effort in their job. Through the analysis of 34 mail questionnaires and individual free interview, data was collected from professors who had worked in electronic R&D laboratory as key member of research & development division. This study obtains the practical informations on the turnover reasons and their understandings of past research organization. The result shows that the major reasons for turnover are to improve job stability and develop their career. And the result indicates that many of them haven't find their visions and future model in their past research organization.
이재하,윤정모,오기식 全北大學校 1986 論文集 Vol.28 No.-
Sulfuric acid leaching from converter flue dust and Arsenic slime was studied at varied concentration of H_2SO_4, leaching time, stirring rate, pulp density and leaching temperature in atmosphere. In addition of oxygen gas also examined. To obtain a better understanding of sulfuric acid leaching behaviours of copper Arsenic and Zinc was studied. The experimental results obtained are summarized as follows; 1) Extraction rate of copper, Arsenic and Zinc was 95% at leaching temperature 90℃, pulp density 100g/ℓ, sulfuric acid concentration 70g/ℓ, stirring rate 600rpm, leaching time 80 min. in addition to oxygen gas 200mℓ/min. 2) Extraction rate of copper and Arsenic was 97% at leaching temperature 90℃, pulp density 200g/ℓ, sulfuric acid concentration 90g/ℓ, stirring rate 600 rpm, leaching time 180 min. in addition to oxygen gas 200 mℓ/min. 3) The leaching residues of converter flue dust and Arsenic slime was sulfuric lead.
Zn-Cd의 析出組成과 電流效率에 미치는 電解因子의 影響
李在夏 전북대학교 공업기술연구소 1982 工學硏究 Vol.12 No.-
Zinc-Cadmium alloys were obtained from a plating bath containing cadmium sulfate, zinc sulfate, glue and sulfuric acid (for adjusting PH of solution) plating variables studied were metal % of Cd in the bath, cathodic current density, temperature, and PH of the bath The following results were obtained : (1) Cd % in the deposits increased with the increases in metal % Cd in the bath and total metal ion concentration and the rise of temperature. (2) Cd % in the deposits decreased with the increases in acidity value of the bath and cathodic current density. (3) Cathodic current efficiencies for the alloy deposition increase with the increase in Cd % in the deposits, which showed an evident upper limit.
이재하 경북대학교 사회과학대학 지리학과 2005 地理學論究 Vol.- No.24
신행정 수도 건설은 사안의 중대성과 그것의 파급효과 때문에 국민들 간에 논란이 계속되고 있으나 국토의 균형발전 실현을 위해서는 꼭 추진되어야 할 국책사업으로 평가된다. 신행정 수도 건설은 단순히 신행정 수도만 건설하는 것이 아니라 국가균형발전정책의 큰 틀 속에서 수도권의 분산과 지방의 자립적 발전을 위해서 공공기관의 지방이전 시책과 연계하여 병행 추진되고 있기 때문에 수도권으로의 집중으로 피해를 받은 지방의 입장에서는 지방발전의 새로운 전기를 맞이 할 수 있는 천재일우(千載一遇)의 기회가 될 수도 있다. 따라서 경북 북부지역에서도 신행정 수도 건설 계획을 정치적인 이유로 반대할 것이 아니라, 그것의 부작용을 최소화하는 대안 즉, ‘작은 신행정 수도’ 건설을 제안하고, 이것이 실현되도록 적극 노력하는 한편, 신행정 수도 건설을 지역발전에 효과적인 지렛대로 활용할 필요가 있다는 점을 강조하였다.