정상 및 재생간의 Cytosol이 흰쥐의 대사기능에 미치는 영향

윤창식,손기섭 충남대학교 의과대학 지역사회의학연구소 1987 충남의대잡지 Vol.14 No.2

Extensive hepatic resection for massive injury and malignant tumor of liver has been markedly increased during past a few decades. Liver regeneration has been shown following partial hepatectomy by many authors with clinical and experimental studies, and considerable experiments have done to find out what is the real property of restoration, when it initiates, when it is most active and when it terminates after partial removal of liver, but still it is uncertain. The purpose of this paper is to provide to focus on the metabolic function, biochemical changes, following administration of cytosol extract from normal and regenerating livers in the normal and partially hepatectomized liver in rats. The results of this experimental study were summerized as follows: 1. The values of SGOT were increased remarkably in all groups (P<0.01). 2. The values of SGPT were elevated significantly in all groups as high as four times or six and a half times (P<O.01). 3. The values of glucose were seen considerably increasing rate in all groups except I -B, II -B, III-B and I.-D. Group I and II were seen very significant changes statistically as P<0.01 and group III were seen considerable change as P<0.05. 4. The values of BUN were seen considerable changes in group II only (P<0.05). 5. The values of total bilirubin were seen very remarkable changes in group II only (P<0.01). 6. The values of total protein were revealed very significant decreasing rate in group I and group II (P<0.01). 7. The values of alkaline phosphatase and albumin were revealed no significant changes in all groups. 8. The group II were revealed most significant changes. It was supposed that maximum response after partial resection of liver was seen at 12 hours in the rat.

CdS:In 單結晶의 基本特性과 photosensor로의 應用

강현식,박병채,장성우,이해익,최용대 全北大學校 敎育大學院 1986 敎育論叢 Vol.6 No.-

The opto-electrical properties of the CdS : In single crystals were studied by these means of the scanning electron microscope, X-ray diffraction, optical transmission & photoconductivity, resitivity variation v.s. impurites, and resitivity v.s. photon flux change. By X-ray diffraction measurement, the structure was found to be hexagonal and the lattice constant was calculated to be a_o=4.13Å and c_o=6.75Å The band gap was estimated to be about 2,419eV (300K). By the transmission measure ments a donor impurity level of In or Al was 0.024eV below the conduction level edge. For the application on the photosensor, the resistivity(ρ) variation of the CdS : In was measured with respect to photon flux(P_o) change and to wavelength, the resistivity was found to be ρ=8.75×10^6P_o^-125 (Ω―㎝/Lux) and the photoconductivity showed its highest response peak between 5,000Å and 5,400Å ranges.

전기전도도 측정을 통한 반류수 MLE공정에서 공기공급 제어기술 개발

장신요(Shinyo Chang),신풍식(Pung Shik Shin),정연구(Yeon-Koo Jeong),최영준(Young June Choi) 대한환경공학회 2020 대한환경공학회지 Vol.42 No.3

목적 : 반류수를 대상으로 무산소조에서 전기전도도 측정을 통해 호기조의 공기공급량을 제어할 수 있는 기술을 개발하여 공정성능 향상 및 에너지 사용량 절감을 달성하고자 하였다. 방법 : 전기전도도가 생물학적처리의 운전지표로 활용될 수 있는지를 검증하기 위해 각 공정별 수질인자와 전기전도도의 상관성 분석을 여름철(메탄올 투입), 겨울철, 가을철 시기로 나누어 실험하였다. 기존에 제시된 필요공기량 수식을 간단히 정리하여 경험식을 제시하고, 이를 활용해 전기전도도 범위에 공기공급량을 순차적으로 넣어 조견표를 작성하였다. 성능평가는 암모니아성질소와 총무기질소의 제거효율, SNR과 SDNR, 공기공급량의 변화, 유입수 변화에 대한 공정의 안정성 등을 기준으로 판단하였다. 결과 및 토의 : 계절별로 전기전도도와 각 수질항목의 상관계수가 0.5267 ~ 0.9115 범위로 암모니아성질소, 총무기질소, DOC, 인산염인 순서로 높게 산출되었다. 상관계수 0.5 이상으로 생물학적 처리공정의 운전지표로 전기전도도 가 활용될 수 있음을 알 수 있었다. 전기전도도와 암모니아성질소의 회귀식은 계절별로 재현성이 확보되어 전기전도도를 통해 암모니아성질소를 추정하는 것이 가능할 것으로 판단된다. 호기조 말단 DO가 3.4 mg/L 정도에서 겨울철 질소처리효율이 가장 양호하였다. 호기조 DO는 공기공급량으로 제어할 수 있으며 질소와 상관성이 높은 전기전도도를 직접 측정하여 공기공급량을 제어하고 질소처리효율을 향상시키는 것이 가능함을 알 수 있었다. 전기전도도와 유입유량을 통해 필요공기량을 산정할 수 있는 경험식을 제시하였고, 식 계수를 구한 결과 A", (B" + X") 는 각각 0.0589 (m³-air/h)/(m³/h)/(μS/cm), -77.562 (m³-air/h)/(m³/h)로 나타낼 수 있었다. 겨울철기간 무산소조의 전기전도도 측정값에 따라서 공기공급량을 자동 제어한 결과는 총무기질소 제거효율과 SDNR이 실플랜트 조건보다 각각 8.3%, 0.007 g-N/g-MLSS/d 높게 나타났다. 자동제어한 기간 동안에 공기공급량/유입유량 평균비가 36(m³-air/h)/(m³/h)로 실플랜트 조건보다 공기공급량을 21.7% 감소시킬 수 있었다. 결론 : 전기전도도 기반 MLE공정의 공기공급 제어기술은 질소제거 효율 향상 및 에너지 사용량 절감을 동시에 달성할 수 있을 것으로 판단된다. Objectives : This study aimed to achieve improved process performance and energy saving by developing a technology to control the air supply of an aerobic basin by measuring the conductivity in the anoxic basin. Methods : To verify whether conductivity can be used as an operation indicator of biological treatment, the correlation analysis between water quality factor and conductivity of each process was conducted by dividing into summer (methanol input), winter and autumn periods. An empirical formula was presented by briefly arranging the required air quantity formula, and a quick reference was prepared by putting air supply in the conductivity range sequentially. The performance evaluation was judged based on the removal efficiency of ammonia nitrogen and total inorganic nitrogen, SNR and SDNR, the change of air supply, the stability of the process against inflow change. Results and Discussion : The seasonal correlation coefficients of conductivity and water quality items were calculated in the order of ammonia nitrogen, total inorganic nitrogen, DOC, and phosphate in the range of 0.5267 ~ 0.9115. It was found that the conductivity could be used as an operation indicator of the biological treatment process with a correlation coefficient of 0.5 or more. The regression equations for the conductivity and ammonia nitrogen are secured by season, so it is possible to estimate the ammonia nitrogen through the conductivity. At the end of the aerobic basin DO was 3.4 mg/L, the nitrogen treatment efficiency in winter was the best. The aerobic basin DO can be controlled by the air supply, and it can be seen that it is possible to control the air supply and improve the nitrogen treatment efficiency by directly measuring the conductivity having a high correlation with nitrogen. An empirical formula for estimating the required air volume through conductivity and inflow is presented. A" and (B" + X") are 0.0589 (m³-air/h)/(m³/h)/(μS/cm) and -77.562 (m³-air/h)/(m³/h). The result of automatic control of air supply according to the measured conductivity of anoxic tank during winter season showed that total inorganic nitrogen removal efficiency and SDNR were 8.3% and 0.007 g-N/g-MLSS/d higher than the actual plant conditions, respectively. During the automatic control period, the air supply/inflow average ratio was 36 (m³-air/h)/(m³/h), which could reduce the air supply by 21.7% compared to the actual plant conditions. Conclusions : The air supply can be estimated from the flow rate and conductivity. The air supply control technology of the conductivity-based MLE process will be able to simultaneously improve nitrogen removal efficiency and reduce energy consumption.

확대행렬의 고유치감도를 이용한 미소신호안정도 해석

문채주,장영학,심관식 木浦大學校 工業技術硏究所 1998 工業技術硏究誌 Vol.8 No.-

New eigen-sensitivity theories of the augmented matrix are applied to small signal stability analysis of EPRI one-machine infinite-bus system and New England 10-machine 39-bus test system. First and second order eigenvalue sensitivities are computed for changes of the parameters of line reactance and controllers including exciter, turbine/governor and PSS. It is found in many cases that since eigenvalue trajectories for parameter changes are nonlinear and first order estimate is not adequate for relatively large variation in parameters. Hence second order estimate is essential to guarantee accuracy for wide range of parameter changes.

구강검진에서 임상검사와 비교한 파노라마방사선사진의 유용성

안서영,안창현,최갑식 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.37 No.2

Purpose : To evaluate the efficacy of panoramic radiography by comparing the results of clinical examination with radiographic findings. Materials and Methods : We studied 190 patients (20 men and 170 women; mean age, 40 years; range, 22 to 68 years) who visited the health promotion center of Korea Medical Science Institute and were examined both clinically and by panoramic radiography. We compared results from both examinations. Treatment options by clinical examination were described as “no treatment indicated”, “treatment of dental caries”, “removal of calculus”, “treatment of periodontal disease”, “prothodontic treatment” and “extraction of the third molar”. Findings taken from the panoramic radiography were: dental caries, periapical lesion, alveolar bone loss, calculus deposition, retained root, impaction of the third molar, disease of maxillary sinus, bony change of mandibular condyle, etc. Results : The prevalence of panoramic findings were: 37.9% of dental caries, 17.4% of periapical lesions, 44.7% of alveolar bone losses, 62.6% of calculi deposition, 7.9% of retained roots, 26.8% of third molar impactions, 6.3% of diseases of maxillary sinus, 2.1% of bony changes of mandibular condlye and 35.8% of miscellaneous lesions. Abnormal conditions revealed by panoramic radiography which had not been discovered on clinical examination were: 24.2% of the patients had dental caries, 17.4% had periapical lesions, 7.4% had calculi deposition, 5.3% had retained roots, 15.3% had third molar impactions. The opposite cases were: 5.2% had dental caries, 12.6% had calculi deposition, and 9.5% had third molar impactions. Conclusion : The use of panoramic radiography as a supplement to the clinical examination might be a valuable screening technique.

全北地域農業活性化方案과 食品加工産業育成戰略

朴正根,申東禾,康昌植 全北大學校 1993 論文集 Vol.36 No.-

This paper attempts to suggest an alternative regional policy of agricultural restructuring and strategies for food processing industry support in Chonbuk. Chonbuk is on the threshold of serious restructuring against the trade liberalization. The increasing pressure of agricultural import liberalization from abroad has given great burden to Chonbuk agricultural sector which has lagged behind the average growth of national agriculture. The challange is to find an orderly process of restructuring that will achieve a more improvement of productivity and stability. This study suggests diversification out of rice monoculture into a multicrop enterprise system as an essential component of agricultural restructuring, induced by the changing relative profitability of rice and nonrice enterprise. The potential for diversification out of rice depends on both physical and economic factors. The profitability of diversification is constrained by both markets and physical infrastructure. Successful transition from rice monoculture to a rice based farming system in Chonbuk should be induced by market forces. The Korean dietary pattern has been changed drastically in parallel with economic growth and the share of processed foods in the daily diet has been increasing over the last decade. Thus, the Chonbuk local government should encourage the growth of the food industry which is projected to continue to grow in the comming years. The structure of the food industry in Korea is lather unique in that small-sized firms produce a greater part of the total output. One major problem facing the small firms in the food industry is that they are often too small to exploit economies of scale in production and marketing. Some small-sized companies are being gradually phased out of business due to shortage of labor and high cost seructure. The expansion of export market is expected to accelerate the development of food industry. In order to keep ahead of competition in export markets, Chonbuk local government should undertake an important role in establishing food combinat to adopt a restructuring and upgrading strategies for food processing industry support.

Development of vitrification protocol in Rubia akane (nakai) hairy roots using a systematic approach.

Park, Sang-Un,Kong, Hyunjung,Shin, Dong-Jin,Bae, Chang-Hwan,Lee, Sheong-Chun,Bae, Chang-Hyu,Rha, Eui-Shik,Kim, Haeng-Hoon Royal Veterinary College 2014 Cryo letters Vol.35 No.2

<P>A solution-based vitrification protocol is a process of sequentially changing-solutions from which both influx of cryoprotectants (loading) and efflux of water (dehydration) were accomplished before cryo-exposure. Hence, we need to properly control the concentration /composition of the cryoprotectant solutions.</P>

Effects of aerosol on evaporation, freezing and precipitation in a multiple cloud system

Lee, Seoung Soo,Kim, Byung-Gon,Yum, Seong Soo,Seo, Kyong-Hwan,Jung, Chang-Hoon,Um, Jun Shik,Li, Zhanqing,Hong, JinKyu,Chang, Ki-Ho,Jeong, Jin-Yim Springer-Verlag 2017 Climate dynamics Vol.48 No.3

<P>Aerosol effects on clouds and precipitation account for a large portion of uncertainties in the prediction of the future course of global hydrologic circulations and climate. As a process of a better understanding of interactions between aerosol, clouds and precipitation, simulations are performed for a mixed-phase convective multiple-cloud system over the tropics. Studies on single-cloud systems have shown that aerosol-induced increases in freezing, associated increases in parcel buoyancy and thus the intensity of clouds (or updrafts) are a main mechanism which controls aerosol-cloud-precipitation interactions in convective clouds. However, in the multiple-cloud system that plays much more important roles in global hydrologic circulations and thus climate than single-cloud systems, aerosol effects on condensation play the most important role in aerosol-induced changes in the intensity of clouds and the effects on freezing play a negligible role in those changes. Aerosol-induced enhancement in evaporation intensifies gust fronts and increases the number of subsequently developing clouds, which leads to the substantial increases in condensation and associated intensity of convection. Although aerosol-induced enhancement in freezing takes part in the increases in condensation by inducing stronger convergence around cloud bottom, the increases in condensation are similar to one order of magnitude larger than those in freezing. It is found that while aerosol-induced increases in freezing create intermittent extremely heavy precipitation, aerosol-induced increases in evaporation enhance light and medium precipitation in the multiple-cloud system here. This increase in light and medium precipitation makes it possible that cumulative precipitation increases with increasing aerosol concentration, although the increase is small. It is interesting that the altitude of the maximum of the time- and domain-averaged hydrometeor mass densities is quite robust to increases in aerosol concentration. This is because locations of gust fronts and homogeneous freezing do not vary significantly with changing aerosol concentration and this outweighs aerosol effects on hydrometeor size.</P>

관광교통의 지역관광 영향분석모형 연구

홍창식,이장춘 한국관광정책학회 2002 觀光政策學硏究 Vol.8 No.3

This study pointed to the lack of theory study on tourism transportation that is necessary to movement of tourist, the lack of method of environment and analysis on regional tourism such as Kyoungbu Express Railway(KTX) and local tourism strategys shortcomings that is prepare for opening of KTX as a national HUB traffic network. In this study analyzed Tourism transportation theory and Express Rail theory and it used the Cost-Benefit theory as a theory of tourism traffic effects on regional tourism. As a result of theory study, research model that is transformed from the cost-benefit analysis that was used on Ph. D. Lee, Chang-Choons study and WTO's report is made clear up. In the aspect of maximize of benefits and minimize of costs, it suggested regional tourism development that explains regional tourism strategy. (regional tourism market, company, resources and products, transportation system and tourism environment) This study is worth knowledge as follows. First, it suggested theological base for tourism related studies by establishing theological system about tourism transportation and KTX. Second, this study used the cost-benefit analysis when it analyzed the effects of national SOC business on tourism, so it could suggest the reasonable approach method to study this kind of studies in the future.

初期 美國文學의 思想的 背景 : Puritanism·啓蒙主義思想 Unitarianism

盧昌植 西原大學校 1983 西原大學 論文集 Vol.12 No.-

Major topics of American literature in the 17th and 18th century is called the literature in religion, which was effectively based on Puritanism, Enlightenment, and Unitarianism. The Puritanism historically based on the Calvinism, whose doctrine was vased on Bible, asserts (1) the history of creatiojn, (2) the Fall of Adam:the predestination is popularly supposed to have been the final proof of the "ingumanity" of Puritanism. calvin stated specially that salvation, the redemption of sinful man through divine Grace, is the free gift of God; the number of those who are thus predestinated to salvation is fixed. Professor Horton and Edwards state five major points of calvinism: (1)Total depravity, (2)Unconditioned election, (3)Limited atonement, (4)Irresistible grace, and (5)Perseverance of the Saints. The early Puritan settlers who came first to New England had the grand dream to establish the Bible Commonwealth based on the Puritanism, but couldn't establish it owing to (1)the outnumber of "unchurched" colonists, (2)the crack between Puritanism and success in worldly insistence on the complete depravity and helplessness of man. The Enlightenment, with its emphasis upon reason rather than authority, its encouragement of scientific inquiry, marked a happy departure from Puritan authoritarianism and encouraged a spirit of optimism especially fitting to the emergent Colonial cultures. With the literary awakening of American literature in the 18th century, American religious society revolted against Orthodox Religion, asserting "the natural right of man". One of the persistent heresies had been that Adam's fall did not involve the whole human race, and that they are capable of effecting their own salvation by faith alone, through baptism, by reason of work of Christ. Unitarians, besides denying the threefold nauture of God, hold that Jesus was a man, and that christianity is not a series of creeds or definitions, but away of life. They believe in five such statements: (1)The Fatherhood of god, (2)The Brotherhood of Ma, (3)The Leadership of Jesus, (4)Salvation by character, and (5) rogress of mankind onward and upward forever. Transcendentalism, effected from Unitarian thought and advocated by Emerson, can be called the literary movement. The Transcendentalists insisted on a complete break with tradition and custom, encouraged individualism and self-reliance, and rejected a too-intellectual approach to life. Transcendentalism insisted on the moral nature of the universe, and pointed to nature as the great object lesson proving God's presence everywhere in his creation. It was Calvinism modified by the assumption of the innate goodness of man.