TLC를 이용한 한국인의 뇨중 아미노산에 관한 연구

박종섭,김창세 최신의학사 1974 最新醫學 Vol.17 No.11

Various steps, from preparation of TLC plate to color reaction of spots, of urinary amino acids by means of thin layer chromatography (TLC) were studied. Based upon this procedure studied by Authors, Rf values of 39 ninhydrin positive substances which appeared frequently in urine were measured in accordance with three different kinds of solvent systems, i.e., chloroform-methanol-17 ammonia, n-butanol-glacial acetic acid-water; and phenol-water. In quantitaion of urinary amino acids unique Author's method was introduced as figure 4. Urinary amino acids in Korean, 10 amino acids, in accordance with the order of high frequency, glycine, histidine, alanine, serine, taurine, citrulline, fl-aminoisobutyric acid, arginine, valine, and hydroxyproline, were amount to 82.3% of total amino acids appeared in urine. The remaining 14 urinary amino acids were taken as 17.7%. Comparison with values from Seoul and Kwangju areas obtained on urinary amino acids, former were 7.3 amino acids per individual and range of 4-11 amino acid, and latter were 4.0 and 3-7 amino acids. In sorts of amino acids alanine, taurine, serine, and citrulline were taken as high frequency in Seoul area but were low in Kwangju area. However hydroxyproline and asparagine were appeared as reverse frequency. By studies depending upon morning, noon, and evening groups, variation of urinary amino acids were not showed markedly. Urinary amino acids arginine and valine were appeared scarecely in evening but S-aminoisobutyric acid and tyrosine were frequently.

농업기술혁신의 경제성 평가와 관리체계

박종섭,안인찬 충북대학교 연초연구소 2004 煙草硏究 Vol.19 No.-

This study originated from an issue that technological innovation is an important factor in modern agriculture and it should be controlled systematically by government and farms. The objective of this study is to find out the methods of economic evaluation and management system of technological innovation in agriculture. Technological progress in agriculture improves the agricultural production function. For any given amount of inputs, we get more output than we did in the past farming. Modern theories of endogenous growth attempt to explain the rate of technological progress, which the Solow model takes as exogenous. These models try to explain the decisions that determine the creation of knowledge through research and development. The growth of agricultural income per farm is determined by the rate of technological progress. Because technological innovation in modernized agriculture is very important factors increasing the revenue and reducing the production cost. The difference between production functions is due to a difference of technique in how the inputs are used in producing the output. A farmer will not adapt a change in technology unless he expects that the adaption will lead to a reduction in per unit costs at the output at which he expects to operate. Since most innovations involve additional expenditures, total costs are likely to be increased at lower levels of output as a result of technological changes. Nevertheless, in order to increase the agricultural production and the levels of living it is necessary to develope and adapt technological improvements in agriculture. The major problem in agricultural technological innovation is to evaluate the economic value of new technology adapted by farmers in agricultural accounting system and to prepare the technological management system to develope better technology. Farms should reflect the economic value of technological changes through financial analysis in agricultural accounting system. Because an essential activity in financial management of agriculture is the development of a timely technological information system that provides a means for the decision maker as a farm operator to measure, evaluate, control, and improve the financial performance of the farm business. The government should develope the education of the skilled technical hands, R&D investment, the accumulation and risk management of agricultural technological information, and the development and spread of agricultural technology. We can expect the principal role of local agricultural college in technological management system of agriculture by the decentralization of agricultural extension function.

농협 연합마케팅 프로그램의 전략과 과제

박종섭 충북대학교 연초연구소 2006 煙草硏究 Vol.20 No.-

The purpose of this study is to evaluate the advantages and disadvantages of pooling used by agricultural cooperatives and create pooling strategies. Pooling is a way to share risk, expenses, and revenue with other producers by marketing agricultural products together. The advantages of pooling in agricultural marketing can be achieved through the economies of scale and scope. Agricultural marketing cooperatives should try to meet the changing consumer demands for environment-friendly organic products, branded agricultural products, small packaged products and ready-to-eat processed foods. Also, agricultural marketing cooperatives should pay close attention to eliminate the moral hazard problem and to prevent low quality products from being marketed in the process of pooling.

원적외선 면상발열체를 이용한 하우스 난방 시스템의 경제성 분석

박종섭,한충수 충북대학교 연초연구소 2006 煙草硏究 Vol.20 No.-

The results obtained from this study can be summarized as follows. 1) The result comparing the economical efficiency of far infrared heating system and gasoline-burned warm air heating system shows that in case of growing a currant tomato and a green perilla on the 60 Pyeong-sized green house respectively, negative farm incomes are earned for all crops, Comparing the far infrared heating system with gasoline-burned warm air heating system, the far infrared heating system is relatively favored in terms of high gross revenue and low energy cost. 2) From the perspective of heating energy costs on an annual basis, the gasoline-burned warm air heating system is higher than far infrared heating system by 152 % and 150 % for a currant tomato and a green perilla respectively. 3) The result analysing the economical efficiency of far infrared heating' system depending on different scenarios indicates that if the rural electrical rates are lowered by more than 10 % and the market price is increased by more than 20 %, the far infrared heating system is economically efficient for growing a currant tomato. And if the market price is increased by 40 % and the tax-free oil price is decreased by 15 %, the gasoline-burned warm air heating system is economically efficient for growing a green perilla.

條件不利地域에 대한 農地保全政策의 妥當性 分析

朴鍾燮 충북대학교 엽연초연구소 1999 煙草硏究 Vol.17 No.-

Two directions of agricultural policy reform in UR-WTO system are (1) to expand the free trade among the countries by reducing the domestic and export subsidies, and (2) to permit the direct payment by means of the agricultural producer support. The principal objective of this study is to find out the economic analysis on farmland conservation policy in mountainous and less favoured areas of Korea. The specific purposes of the study are (1) to compare the policies among the developed agricultural countries, (2) to analyze the economic background of incentive policy, (3) to investigate the conservation policy and the utilization program on farmland in mountainous and less favoured areas. The results obtained from this study can be summarized as follows. (1) The developed agricultural countries, such as EU, Austria, Finland, Norway, Sweden, Switzerland and so on have been carried out the various direct payment program in mountainous and less favoured areas. (2) The direct payment in mountainous and less favoured areas of Korea should be strengthened for the conservation and utilization of farmland. (3) In order to promote the direct payment program in mountainous and less favoured areas, the accurate valuation on the multifunctionality of agriculture should be preceded. In addition, it is necessary that the importance of agriculture in people's life of future should be recognized by the nation. (4) In Korea, we must establish the farmland utilization program classified by Ri-Dong to conduct the direct payment system for farms in mountainous and less favoured areas.

제트베인형 추력편향장치의 공기역학적 특성

박종호,이성노,이은모,신완순,이택상,길경섭 충남대학교 공업교육연구소 2000 論文集 Vol.23 No.1

The aerodynamic study of jetvane type TVC(Thrust Vector Control) were conducted using supersonic cold-flow system. The use of TVC Systems in particular jet vanes, are currently being researched for use in air launch, ship launch, underwater launch and high altitude maneuvering of tactical missiles and rockets. The necessity to generate control forces to rapidly change the course of the missile is frequently required when traditional, exterior aerodynamic surfaces are unable to produce these forces, when the flow over the control surface is insufficient. This situation can occur at launch, or high angles of attack of the control surfaces. Jetvanes performed well at all altitudes and environmental conditions, and jet vanes are extremely effective at deflection angles up to as high as 30 degrees, make them ideal for the launch and maneuver applications. In this study, aerodynamic performance test of jetvane type TVC was conducted, and The effect of shape and deflection angle of various types of jetvanes are investigated

政府支出과 租稅收入間 因果分析 : 오차수정모형의 응용

박종섭 충북대학교 농업과학기술연구소 1996 農業科學硏究 Vol.13 No.-

This paper applies cointegration and error-correction models to test the causal relation between government expenditures and tax revenues in Korea over the period 1953-1995. These econometric techniques have recently gained attention in empirical research not only for simplicity and relevance in analysing time-series data but also for ensuring stationary and providing additional channels through which Granger causality could emerge if two variables are cointegrated. We performed the unit root tests in levels and first differences. The levels of tax revenue and government expenditure variables are non-stationary, but the first differences of that variables are stationary indicating that these variables are in fact integrated of order one, I(1) . We performed Engle Granger cointegration tests by estimating the cointegrating equation in order to obtain the residuals used in the error-correction models. We are interesting to see what causes what, that is, the direction of causality between tax revenues and government expenditures. The empirical results obtained from the error-correction models indicate that causality runs from government expenditures to tax revenues. This is based on the significance of the error-correction coefficient, η. The results imply that higher government expenditures would lead to higher tax revenues.

발생원별에 따른 PAHs 배출특성

박찬구,윤중섭,김민영,손종열,모세영 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.3

The results of individual PAH source profiles that can be applied to receptor model are as follows. The sum of 16 PAH concentrations was 391.41 ng/S㎥ in a tunnel. Phenanthrene was the most abundant compound among 16 PAH, and then pyrene, fIuoranthene, anthracene, and naphthalene can be seen in elevated contents. 11,056.61 ng/S㎥ of 16 PAH concentrations in BC oil boiler was two times higher than 6,582.57 ng/S㎥ of those in LNG boiler. Naphthalene was the most abundant compound in both facilities. Phenanthrene, anthracene. and acenaphthylene were the second dominant compound group in order from both facilities. BC oil boiler had relatively high concentration of pyrene compared to LNG boiler that had high concentration of fluorene and did not detect pyrene. The sum of 16 PAH concentrations emitted from MSW incinerators after APCD (air pollution control device) was three times higher than those from MSW incinerators bcfore APCD. However, the concentrations of more than 4-ring PAH compounds (e.g., benzo (a)anthracene) before APCD were higher than those after APCD. This fact implies that PAHs generated by combustion process are eliminated in APCD and they are continuously produced in stack or atmosphere by PAHs precursors.

포도 브랜드 자산의 가치창출 전략

박종섭 충북대학교 연초연구소 2008 煙草硏究 Vol.21 No.-

-본문참고-

혼합용매계에 있어서 전해질의 전도도에 관한 연구 (Ⅰ) : 메탄올-물 혼합용매에서의 염화칼륨의 전도도 The Conductance of Potassium Chloride in Methanol-Water Mixtures

박종열,엄태섭 東亞大學校 1974 東亞論叢 Vol.11 No.2

메탄올-물 혼합용매에서 염화칼륨(KCl)의 전도도를 25。와 30。C에서 측정하고 Fuoss-Onsager식을 적용하여 limiting equivalent conductance(??)와 conductance parameter ?? 및 ??를 구하였다. 즉 0.1에서 0.8몰분율에 이르는 7가지 조성의 혼합용매 및 단일 용매인 물과 메탄올에 대해서 각 용매마다 0.01∼0.10M 농도범위의 염화칼륨용액을 만들어 그 전도도를 측정하였다. 극한 당량전도도(??)는 Fuoss-Onsager식에 의거하여 一次的인 近似法으로서 농도(??) 변화에 대한 당량전도도 값을 plot하여 얻은 직선의 기울기에서 A??를 구하였다. 다음 이차적으로 극한당량전도도 값을 구하기 위하여 농도(c)변화에 대한 ?? 값의 plot에서 slope ??와 intercept 즉, 극한당량전도도(??) 값을 최소자승법으로 구하였다. 실험결과 극한당량전도도는 온도 상승에 따라 증가함을 보였으며 또한 혼합용매 조성에따른 ??의 변화는 0.4 몰분율에서 minimum을 나타내었다. 한편 conductance parameter ??는 0.3 몰분율에서 최소값, 1.0 몰분율에서 최대값을 보였고, ??는 매우 근소한 작은값으로 관측되었으나 어떠한 규칙성 있는 변화는 볼 수 없었다. The conductances of potassium chloride were measured at 25。C and 30。C in methanol-water mixtures. The limiting equivalent conductance(∧??) and conductance parameters ?? and ?? were obtained using the Fuoss - Onsager’s conductance equation in the following form; ?? A first approximation for the quivalent conductance at infinite dilution was obtained from a plot of ∧ against ??. The parameter ?? is thus calculated, and a better value for ?? was found through a plot of ?? against concentration, and then determined the slope ?? and intercept ?? with a least square fit. The limiting equivalent conductance and conductance parameter as a function of solvent composition and temperature are discussed in terms of the structural change of the solvent, and also the interactions between ion-solvent and solvent respectively. The experimental results indicate that the limiting equivalent conductance showed the minimum value at 0.4mole fraction of methanol, which was the good analogy with those results of the partial molal volume of which observed for the other electrolytes with respect to the solvent system as examined in this study. It has been concluded that this behavior seems presumably to be the results of having minimum structuredness and free volume of water attributable to the electrostriction effect of ions. The parameter ?? showed the minimum at 0.3 mole fraction, while the value of ?? was found very small with varing the solvent composition.