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.

공주읍의 현황조사

이재하 경북대학교 문리과대학 지리학회 1975 洛東地理 Vol.- No.1

공주가 한때는 도청소재지가 있어 지방행정중심도시였으나 경부선, 호남선의 개통으로 침체된 도시로 화한 것은 주지의 사실이다. 공주와 같은 소도시에서는 특별한 입지조건으로 특수산업이 발달하지 않는 한 현재 상태로서는 발전성이 있다고는 볼 수 없다. 그러나 이 도시를 발전시킬 수 있는 잠재적 기능이 있다면 교통기능과 최초의 관광지역개발에 있다고 이곳 주민 및 지도자들은 말하고 있다. 도로교통이 공주 주위를 환상적으로 발달해 있고 호남에서 서울로 대전에서 서해지방으로 가는 통로가 되어 소위 도로가 4통8달로 열려 있어 도로교통의 요충이라 할 수 있다. 그러므로 이러한 교통기능과 최근의 무령왕릉 발굴지와 함께 인근 관광자원을 개발한다면 관광도시로 발전이 기대된다. 인근에 있는 계룡산, 유성온천, 현충사, 대천해수욕장, 부여 등과 함께 하나의 큰 관광지역을 이루고 있는데 공주는 이 지역의 중심지에 있으므로 공주 내의 공산성, 금강, 금강대교, 쌍수정, 관복류, 진남루, 봉황산, 무령왕릉지, 인근면에 있는 마곡사 등의 관광자원을 잘 개발하고 관광시설을 확충하면 좋은 관광지로 성장할 가능성이 매우 크다고 본다. 읍장에 의하면 정부는 공주, 부여 간을 하나의 관광구역으로 설정해서 종합개발을 할 예정이라고 한다. 이렇게만 된다면 공주는 부여와 함께 호서지방의 관광지로 큰 각광을 받을 것이라고 생각된다.

전로연회 및 비소전물의 황산침출에 관한 연구

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.

기업연구소에서 대학으로의 이직선호에 관한 연구

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.

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

技術需要 調査事業의 展開方向에 관한 硏究

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.

計量分析模型을 통한 主要 製造産業의 硏究生産性分析

이재하 남서울대학교 1995 남서울대학교 논문집 Vol.1 No.-

The main objectives of this study are 1) to identify the Time-lag structure between input and output in corporate activities. 2) to extract the major effect factors among the input factors. We take electric·electronic, machinery and total manufacturing industries in the period 1976-1993 as a range of analysis in this study. Input Factors are included in R&D expenditure, R&D manpower, Production expenditure, Production manpower, Marketing expenditure. Technology Import Payment, and the Number of manpower classifed by an academic degree. Output Factors are prescribed the number of Patents Applied & Granted as direct outcomes. In this study, the following results have been gained by carrying out the various multi-variate analysis. 1) The time - lag (1∼3 years) period is shorter than that the established foreign studies. 2) Patents Applied & Granted are affected by the Technology Import as much In-house R&D as ever. 3) Direct outcomes are affected by the Expenditure (R&D, Production) than by the Manpower(R& D, Production). It is expected that these results will be useful in establishing technology investment policy in Korean manufacturing industries.

亞鉛-鐵 合金電析에 있어서 電解條件이 析出助成 및 陰極電流 效率에 미치는 影響

李在夏,尹正模 전북대학교 공업기술연구소 1983 工學硏究 Vol.13 No.-

The effects of the electrolysis condition on the composition of deposits and cathode current efficiency were investigated in the electrodeposition of zinc-iron alloy. Zinc-iron alloy was elestrdeposited from sulfate solutions and the cocentration of electrolytic solution, current density, temperature and pH were varied in order to examine these effects. Zinc sulfate. iron sulfate and glue were contained in sulfate solutions and sulfuric acid was used to control the pH of this solution. The results obtained in this study were summarized as follows; 1) The percentage of iron deposition was increased as the iron ion in electrolytic solution increased. 2) Base Zinc was preferentially deposited than noble iron with the incraese of current density, because zinc hydroxide film was formed on cathode. 3) The percentage of iron deposition was increased as the temperature of electrolytic solution increased. 4) The percentage of iron deposition was little changed as pH increased. Cathode current efficiency was found to be varied similarly with the deposits.

全北 産業用 無煉炭에 關하여 : 工業分析, 發熱量을 中心으로

李在夏,李圭澤,李大喆 全北大學校 1968 論文集 Vol.10 No.-

A fuel has already been defined as a carbon or hydrogen element or a hydrocarbon compound found native or manufactured so as to be obtainable in sufficient quantities and at a low cost, so as to be used as a source of heat. Anthranite coal has principally been used in our circumferences. So we have examined to compare anthracite coal with other fuels in calorific value and price-especially to determine possibilities of utilizing anthracite coal rather than others. In this intetion, we have attempted to observe the degree of contribution as a industrial fuel of anthracite coal.

대구시 금호강 동변지역의 도시개발방향

이재하 慶北大學校 社會科學大學 地理學科 1997 地理學論究 Vol.- No.17