광양만 유역 퇴적토 중의 다환방향족탄화수소류

정흥호,정호승,김은영,조환익,황주찬,최상원 한국환경과학회 2004 한국환경과학회지 Vol.13 No.6

Polycyclic aromatic hydrocarbons(PAHs) in sediments of Kwangyang bay on Korea, have been investigated by gas chromatography-mass spectrometery (GC/MS). The average content of total PAHs in all samples was 2,211ppb, and the range was from 36 to 22,699pph. The higher concentrations were found in sediment sampled near Kwangyang iron processing plant, Taeindo. The resulting distributions of PAHs according to the number of aromatic ring and molecular ratios of specific aromatic compounds (phenanthrene, anthracene, fluoranthene and pyrene) have been discussed in terms of sample location, origin of the organic matter. Four, five and six rings of PAHs were mainly found near to Kwangyang iron processing plant, and three and four rings near to Yeosu chemical kombinat. This result typically indicated the local characteristics, depending on the origin of PAHs.

상미분방정식 경계치문제에서 경계치 추정

이경호,조정기 순천향대학교 기초과학연구소 2011 순천향자연과학연구 논문집 Vol.17 No.2

In this paper, we consider a parameter estimation problem for a boundary value problem. Using linear finite element scheme in the weak formulation, the boundary condition is estimated from the solution observations on some fixed positions. Numerical experimenents are reported.

조직변화의 선행요인에 관한 연구

조정호,권순일 新羅大學校 1999 論文集 Vol.47 No.-

Organizations must be changed if they are to survive, although they oftin appear resistantly to change. And they are frequently transformed into forms remarkably different from the original. The purpose of this paper is studying the framework, the antecedents, and theoretical model of organizational change. The second part of this paper was devoted to concept of organizational change. The concept of organizational change are consisted of the definition and purpose, the typology, the resestance to change and coping strategy, nad the sources of organizational change. The sources of organizational change may be external, internal, or a combination of both. Whether caused by external or internal factors, organizational change invariably affects four independent factorsstructure, task, technology(tools) and people. The third part of thes paper was devoted to discuss the four antecedemts of organizational change-culture of organization, leadership, power(organizational politics) and informational technology. Also, four propositions of organizational change were discussed. Finally based on discussion above I develop the theoretical model of organizational change.

Dog Liver Mevalonate Kinase의 分離및 成質에 關한 硏究

趙仁鎬,朴忠雄 全北大學校 基礎科學硏究所 1981 基礎科學 Vol.4 No.1

Mevalonate kinase(EC 2. 7. 1. 36), the first enzyme in the ATP-requiring sequence of cholesterol bisoynthesis, has been purified from dog liver and investigated some its properties. 1. This enzyme has a specific activity of 27. 21 μmoles of product formed per min per mg of protein. 2. The effect of MG^2^++, Mn^++ on MVA kinase activity was investigated as follw; Mn^++> Mg^++(at low concentration) Mg^++> Mn^++(at high concentration) 3. The initial velocity pattern suggests that the mechanism of the dog liver mevalonate kinase reaction sequential.

바나나 과실 함유탄닌이 소화효소 작용에 미치는 영향

정정한,류충호,조영수 東亞大學校附設遺傳工學硏究所 1997 遺傳工學硏究 Vol.- No.4

바나나 과실을 시중에서 구입하여 미숙과실과 황숙과실로 구별하고 이것을 과육부분과 과피부분으로 나누어서 동결건조 및 열풍건조시켜 실험 시료로서 사용하였다. 탄닌 함량을 분석한 결과 황숙과실 보다도 미숙과실에서 높았으며, 과육보다는 과피에서 열풍건조 보다는 동결건조시킨 시료에서 높은 경향을 나타내었다. 탄닌의 분획은 Sephadex LH-20칼럼을 사용하여 분획하였다. 바나나 과실에서 함유하고 있는 탄닌은 prodelphinidin, procyanidin을 구성단위로 하는 proanthocyanidin류의 축합성 탄닌으로 이러한 탄닌은 소화효소인 trypsin(EC 3. 1. 1. 3), α-amylase(EC 3. 4. 21. 4), lipase(EC 3. 2. 1. 1)에 대하여 in vitro에 있어서 저해작용을 가지고 있는 것이 확인되었으며 또한 탄닌은 중합도가 높을수록 저해율이 높다는 것이 확인되었다. It has been shown that tannins have adverse effects on growth of animals and feed utilization. Tannins are usually classified into hydrolyzable and condensed types but the adverse effects are more marked in condensed tannin in hydrolyzable tannin. Furthermore, the principle condensed tannins found in banana fruits are pro types by the polymerization of flavan-3, 4-diols either alone or in combination with other flavonoids such as catechins. Tannin of the investigated banana(Banana;Musa sapientum LINN)fruits was fractionated into four or five molecular forms, according to the degree of polymerization by chromatography on a column of Sephadex LH-20. The protein-precitating capacity of the fraction noted tannins increased in degree polymerzation. The inhibitory effect of tannins on trypsin(EC 3. 4. 21. 4), α-amylase(EC 3. 2. 1. 1) and lipase(EC 3. 1. 1. 3) activities in vitro also increased with the increased in degree of polymerization.

지식경영의 개념에 관한 연구

조정호,권순일 신라대학교 경제경영연구소 2001 경제경영연구 Vol.2 No.-

ATM-MPLS 기반 초고속국가망서비스의 서비스품질 강화 방안

조정호,노선식,이형옥 한국정보사회진흥원 2005 정보화정책 Vol.12 No.4

정부는 초고속국가망 구축사업을 1995년부터 시작하여 2005년까지 완성하기로 하고, 2004년 말 기준으로 국가 및 지방자치 단체, 교육기관, 연구기관, 의료기관, 기타 공공기관으로 하여금 다양한 서비스를 저렴한 비용으로 이용할 수 있도록 추진하고 있다. 초고속국가망의 고품질 서비스 제공을 위해 도입한 ATM-MPLS망에서 서비스품질과 보안서비스 제공 방안을 제시한다. 이를 위해 먼저 초고속국가망사업의 서비스 동향과 단계별 사업 추진 내용을 알아보고, 다음으로 초고속국가망 사용자의 종단간 서비스품질을 제공하기 위한 서비스품질 제어방법을 제안한다. 마지막으로 초고속국가망에서 이용하는 MPLS VPN, Metro-ATM에서 종단간 서비스품질을 보장하는 방안을 제시한다. 이를 위해 ATM-MPLS 서비스, ATM-MPLS VPN 서비스, Metro-Ethernet 서비스의 기술 동향과 서비스품질을 보장할 수 있는 방안을 제시한다. 이러한 분석을 통해 초고속국가망의 서비스품질 정책과 서비스품질을 강화하기 위한 계획을 찾을 수 있다.

유동성 및 응축성 복합레진의 점탄성에 관한 유변학적 연구

조병훈,이인복,권혁춘,손호현,엄정문 대한치과보존학회 2000 Restorative Dentistry & Endodontics Vol.25 No.3

The purpose of this investigation was to observe the viscoelastic properties of five commercial flowable(Aeliteflo, Flow it, Revolution, Tetric flow, Compoglass flow) , three conventional hybrid(Z-100,Z-250,P-60) and two condensable(Synergy compact, SureFil) resin composites. A dynamic oscillatory shear test was done to evaluate the storage shear' modulus (G' ) , loss shear modulus(G") , loss tangent(tan δ) and complex viscosity(η* ) of the resin composites as a function of frequency dynamic frequency sweep test from 0.01 to 100 rad/s at 25℃ - by using Advanced Rheometric Exparusion SystemtARES) . To investigate the effect On the viscosity of resin composites of filler volume fraction, the filler weight % and volume % were measured by means of Archimedes' principle using a pyknometer. The results were as follows 1.The complex viscosity η* of flowable resins was lower than that of hybrid resins and significant differences were observed between brands. The complex viscosity η* of condensable resins was higher than that of hybrid resins. The order of complex viscosity η* at ω = 10 rad/s was as follows. Surefil, Synergy compact, P-60, Z-250, Z-100. Aeliteflo, Tetric flow, Compoglass flow, Flow it, Revolution. The relative complex viscosity of flowable resins compared to Z-100 was 0.04-0.56 but Surefil was 30.4 times higher than that of Z-100. 2.The storage shear modulus G' and the loss shear modulus G" of flowable resins were lower than those of hybrid resins but those of condensable resins were higher. The patterns of the change of loss tangent, tan δ of resin composites with increasing frequency were significantly different between brands.The phase angles,δ, ranged from 30.2-78.1˚at ω = 10 rad/s. 3.A11 composite resins represent pseudoplastic nature with increasing shear rate. 4.The complex shear modulus G* and the phase angle δ was represented by the frequency domain phaser form, G*( ω )= G* eIδ = G*〈 δ. The locus Of frequency domain phaser plots in a complex plane was a valuable method that represent the viscoelastic properties of composite resins. 5.There was no direct linear correlationship but a weak positive relation was observed between filler volume % or weight % and the viscosity of the resin composites.

Cycloheximide가 Mouse肝臟의 인산염 分解酵素의 活性에 미치는 影響

趙賢熙,鄭鎬三,李圭植 漢陽大學校 環境科學硏究所 1985 環境科學論文集 Vol.6 No.-

Cycloheximide는 Streptomyces griseus에서 추출한 항진균성 항생제로 진균의 성장을 저해하는 물질로 알려져 왔으며 포유동물의 세포에서 ribonucleic acid와 단백질 합성을 저해한다고 생화학적 방법에 의하여 보고되었다. 최근에 이르러 cycloheximide의 투여로 간세포내 소기관인 조면내형질세망 및 Golgi complex의 손상에 의해서 단백질합성이 저해된다고 형태학적으로 연구 보고된 바 있다. 이와같은 cycloheximide의 투여로 간세포가 손상을 입어 단백질합성이 저해될 때 간세포내 인산염분해효소로 분포되어 있는 acid phosphatase와 adenosine triphosphatase 활성을 추구하였다. 실험동물로는 실험실에서 사육한 건강한 ICR계 체중 20∼30gm의 mouse를 사용하였으며 정상대조군과 cycloheximide 투여군으로 구분하고 실험군은 다시 cycloheximide 투여 후 6시간군, 12시간군, 24시산군 및 36시간군으로 나누었고 각군에 10마리씩 배정하였다. Cycloheximide는 mouse의 체중 ㎏당 4㎎ 되게 생리적 식염수에 용해하여 0.1㎖를 복강내에 투여후 6시간, 12시간, 24시간 및 36시간 후에 희생시켜 간장을 적출하고 10% neutral formalin에 고정한 다음 cryostat로 두께 15㎛ 되게 동결절편을 만들어 Gomori법으로 acid phosphatase활성과 Wachstein 및 Meisel법으로 adenosine triphosphatase 활성을 관찰한 결과 다음과 같은 결과를 얻었다. 1. Cycloheximide 투여후 6시간, 12시간군 및 24시간군의 mouse 간소엽에서 중심 정맥부로 부터acid phosphatase 활성이 증가되기 시작하여 36시간군에서는 간소엽 전역에 중등도 이상의 강한 활성이 관찰되었다. 2. Cycloheximide 투여후 24시간군에서 부터 간소엽의 중심 정맥부에 ATPase 활성이 감소되기시작하여 36시간 경과군에서는 간소엽 전역에 음성반응을 나타내었다. 상기와 같은 결과는 cycloheximide 투여로 간장의 acid phosphatase는 간장이 손상을 입을 때 그 활성이 보다 강한 양성반응을 보이고 adenosine triphosphatase는 역으로 활성이 약해진다고 사료된다. It has been knwon that cycloheximide, an antifungal antibiotics extracted from streptomyces griseus, inhibits the growth of fungus. It has been reported by several investigators that this drug inhibits ribouncleic acid activity and protein synthesis of the mammalian cell. Recently, several reporters indicated that the cycloheximide causes the damage of hepatocyte. The observations by electron microscopic, histochemical and histological studies revealed that cycloheximide inhibits the RNA and protein synthesis by the injury of rough endoplasmic reticulum and the desocciation of polysome in hepatocyte. This study attempted, on the activities of acid phosphatase adenosine triphosphatase, phosphatelysis-enzymes distributed in the hepatocytes in the mouse liver. Healthy albino mice(ICR strain) of 20gm±in body weight were used as experimental animals which were divided into the control and cycloheximide treated groups. The animals of the cycloheximide treated groups were administered cycloheximide. (dissolved in physiological saline sol., by intraperitoneal injection in a dose of) 4mg per kg of body weight in a volume of 0.1ml, intraperitoneally. The experimental animals were sacrificed at intervals of 6, 12, 24 and 36 hours after administration of cycloheximide, respectively. The liver specimens were fixed with 10% neutral formalin, the sections of 15㎛ thickness were stained by Gomori, Wachstein and Meisel`s method for the detection of acid phosphatase and adenosine triphosphatase activities. The results were obtained as follows; 1. Acid phosphatase activity was increased in the central zone of liver lobule at the 6 hour and 24 hour period of the cycloheximide treated group, moderately positive activity was showed in the liver lobule at the 36 hour period group. 2. Adenosine triphosphatase activity was decressed in the centrol zone of liver lobule at the 24 hour period of the cycloheximide treated group. Negative reactions were showed in the whole liver lobules at the 36 hour period group. Consequently, it is supposed that cycloheximide caused increase of liver acid phosphatase result from liver damage, while adenosine phosphtase activity of the liver was decreased.

한국인 인슐린비의존형 당뇨병환자에서 엔지오텐신 1-전환효소 유전자의 다형성과 당뇨병성 만성합병증 및 관상동맥질환과의 관계

정민영,천남일,이창훈,조동혁,강호철,정동진,정명호,강정채,박종태,양승원 全南大醫大 2001 전남의대학술지 Vol.37 No.3