筋小胞體의 ATPase Kinetics에 關한 硏究

朴映淳,李承兩,朴泰水,庾基洙,李 弘,金允坤 圓光大學校 1982 論文集 Vol.16 No.2

본 연구에서는 토끼 골격근 소포체에서 분리한 근소포체의 ATPase활성에 대한 일반적 특성과 수종의 2가 양이온(??)의 영향에 관한 연구를 하였다. ATPase활성과 Ca uptake에 미치는 2가 양이온의 저해 효과와 저해기작은 Dixon plot, Lineweaver-Burk plot, Hanes-Woolf plot, Woolf-Augustinsson-Hofstee plot, Eadie-Scatchard plot, Arrhenius plot등을 이용하여 분석하였으며 그 결과는 다음과 같다. 1. 근소포체의 ATPase는 ??과 ??의 존재하에서 활성화 되어지며 ??의 농도가 4mM일 때 ??의 최적 농도는 0.1mM이었다. 2. 근소포체의 ATPase는 ??-ATPase와 (??)-ATPase로 구성되어 있고 (??) - ATPase의 활성은 ??-ATPase의 활성보다 높았다. 3. ATPase의 활성화 에너지는 약 19Kcal/mol이었다. 4. ATPase 활성에 미치는 2가 양이온은 12.5㎛과 400㎛의 범위 내에서 이온 농도가 증가됨에 따라서 활성도는 점점 감소되었다. 5. ATPase활성율 50% 저해시키는데 2가 양이온의 농도는 Ki값과 같아서 ??, ??, ?? Pd ??에 대한 각각의 농도는 10㎛, 30㎛, 130㎛ 및 350㎛이었다. 특히 ??은 저 농도에서 (12.5-100㎛)는 활성제로, 고농도에서 (200-400㎛)는 저해제로 작용하는 것 같다. 6. 2가 양이온은 ATPase의 Km에는 변화를 주지 않으나 Vmax의 저하를 일으키는 것으로 보아 비경쟁 저해제임이 판정되었다. 7. 2가 양이온은 가역적 저해제임이 판명되었다. 8. Ca 吸收能에 대한 CuCl₂의 阻害는 50~500㎛의 CuCl₂농도에서 현저히 나타났으며 이 현상은 Ca 吸收能과 ATPase 活性과 밀접한 관계를 보여주는 것이다. General properties of the ATPase and the effects of the divalent cations (??) on the total ATPase activity of the fragmented sarcoplasmic reticulum (FSR) isolated from rabbit skeletal muscle were investigated in the present resent research. The inhibitory effect of divalent cations on the FSR ATPase activity and its mechanism were analyzed by various plots such as Dixon plot, Lineweaver-Burk plot, Hanes-woolf plot, Eadie-Scatchard plot and Arrhenius plot. The results obtained were as follows: 1. The FSR ATPase is activated by ?? and ??; the optimum concentration of is 0.1 mM in the presence of 4 mM MgCl₂. 2. The FSR ATPase could be distinguished as ??-ATPase and (??)-ATPase. The activity of (??)-ATPase predomiant over that of ??-ATPase. 3. The apparent energies of activation for total ATPase was approximately 19Kcal/mole. 4. The inhibitory effects of the divalent cations on the enzyme activity increased as the concentrations of the divalent cations increased in the concentrations between 12.5 and 400㎛. 5. Concentration of 50% inhibition for each divalent cation was almost identical with the inhibition constant (ki). The Ki's were 10,30,130, and 350㎛ for ??, ??, ??, and ??, respectively. ?? seemed to be anactivator at lower concentrations and an inhibior at higher concentratios. 6. The divalent cations did not change the Km but decreased the Vmax of the FRS ATPase, suggesting that they are noncompetitive inhibitors on the FSR ATPase. 7. The divalent cations were also found to be revesible inhibitors on the FSR ATPase. 8. The inhibitory effect of CuCl₂on a uptake increased as the concentration CuCl₂increased in the range between 50㎛.

관동맥질환에서 저밀도 지단백 입자 크기의 분포

임효영,김인숙,승기배,강동헌,전두수,장기육,박준철,이수영,홍순조,최규보 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

내열성 Polyesterimide의 합성 및 물성 연구

박이순,하기룡,박진국,도정희 경북대학교 산업기술연구소 1992 産業技術硏究誌 Vol.20 No.-

Pyromellitic dianhydride(PDA)와 4-aminophenol(AMP)의 이미드화 반응을 통하여 양말단에 phenolic OH기를 갖는 bisphenolbisimide형 단량체를 합성하였다. 합성된 bisphenolbisimide 단량체를 terephthaloyl chloride 혹은 aliphatic acid dichloride와 반응하여 polyesterimide들을 얻었다. 종합반응은 용액중합 및 계면중합 반응을 사용하였으며 용액중합 반응이 수율을 향상시킴을 알았다, 생성된 polyesterimide들은 FT-IR, NMR을 사용하여 구조를 확인하였으며 DSC 및 TGA로 역적 성질을 측정한 결과 Tm=401℃, 최대분해온도가 500℃ 이상의 고내열성을 나타냄을 확인하였다. Bisphenolbisimide type monomer with phenolic OH group at both ends were synthesized through the imidzation reaction of pyromellitic dianhydride(PDA) and 4-aminophenol(AMP). Bisphenolbisimide monomer was reacted with terephthaloyl chloride of aliphatic acid dichlorides to give polyesterimides. Polymerization reactions were conducted by solution and interfacial polymerization method, the former with higher polymer yield. The structure of polyesterimides were characterized by FT-IR and NMR, Polyesterimides showed high termal stability with Tm=401℃ and maximum decompositon temperature of over 500℃.

K이 흡착된 Si(111)7×7표면에 대한 RHEED 연구

박종윤,이순보,이경원,안기석,신익조,강건아 성균관대학교 1990 論文集 Vol.41 No.2

상온 및 200℃∼600℃의 Si(111) 7×7 표면에 칼륨(K)을 증착하였을 때의 표면격자구조 변화를 RHEED로 관측하였다. K 증착시 Si(111)7×7 기판의 온도가 상온인 경우, 어느 일정한 증착시간(포화덮임률에 도달했다고 추정되는 증착시간)이 지난 후에는 원래의 깨끗한 Si(111)7×7 패턴과 유사한 Si(111) 7×7-K 패턴이 관측되었고, 증착시간을 증가시켜도 RHEED 패턴은 변화하지 않았다. 이것을 annealing하면 350℃까지는 RHEED 패턴에 변화가 없다가 그 이상의 온도가 되면 서서히 원래의 7×7 패턴으로 되돌아가기 시작한다. Si(111) 7×7기판의 온도를 200℃∼600℃로 유지하면서 K을 일정시간(450℃에서 3×1이 형성되는 증착시간)이상 증착시킨 경우에 250℃까지는 상온의 경우와 비슷한 형태의 변형된 7×7 패턴이 관측되고, 300℃∼550℃일때는 3×1, 550℃ 이상에서는 1×1 구조가 관측되었다. 이때 300℃∼550℃에서 형성된 Si(111) 3×1-K 구조는 450℃에서 1분 정도 annealing 하면 항상 Si(111) 1×1-K 구조로 상전이가 일어남을 관측하였다. Potassium adsorbed surface structures of Si(111) 7×7 surface at room and high temperatures(200℃∼600℃) were investigated by RHEED. Potassium adsorption on the Si(111) 7×7 surface to saturated coverage at room temperature changed the RHEED pattern of Si(111) 7×7 to Si(111) 7×7-K. Subsequent heating of the Si(111) 7×7-K surface above 350℃ results in a Si(111) 7×7 with desorbing K. The RHEED pattern of the K-adsorbed on the Si(111) 7×7 surface up to the adsorption temperature of 250℃ was the modified 7×7 pattern, quite similar to that of the Si(111) 7×7-K, observed at room temperature. The 3×1 structure was observed in the temperature of adsorption between 300℃ and 550℃. Regardless of the adsorption temperature, a phase transition always took place from the Si(111) 3×1-K structure to Si(111) 1×1-K after annealing at 450℃ over 1 minute.

고내열 Polyester-imide Resin의 합성 및 열적 성질

박이순,하기룡,도정회 경북대학교 산업기술연구소 1993 産業技術硏究誌 Vol.21 No.-

Methylene dianiline(MDA)와 trimellitic anhydride (TMA)를 반응시켜 diacid diimide (DID)를 합성하고 이를 과량의 ethyleneglycol과 반응시켜 bishydroxyethylbisimide(BHEI) 중간체를 합성하였다. 다음 dimethylterephthalate와 ethyleneglycol를 에스테르 교환 반응시켜 bishydroxyethyl terephthalate(BHET)중간체를 합성하였고 이를 BHEI와 280℃, 감압(1~3 ㎜Hg)의 용융상태에서 축합 중합하여 polyester-imide를 얻었으며 GPC 및 ^1H-NMR로 분자량 및 공중합체 조성을 구하였다. 생성된 공중합체는 imide단위가 2-10 mole% 함유됨에 따라 PET단독중합체(T_g=78.9℃)보다 내열성(공중합체 T_g=81.9-91.6℃) 이 증가됨을 확인하였다. Methylene dianiline(MDA) was reacted with trimellitic anhydride(TMA) to give diacid diimide(DID) and then DID was reacted with excess of etyleneglycol to give bishydroxyethylbisimide(BHEI) intermediate. Dimethylterephthlate was reacted with ethyleneglycol by ester interchange reaction to give bishydroxyethylterephthalate(BHET) intermediate. BHET and BHEI was cocondensed in the melt state at 280℃ under reduced pressure (1~3 ㎜Hg) to give polyester-imide type copolymer. The molecular weight and composition of copolymer was determined by GPC and ^1H-NMR. The resulting copolymer showed increased thermal stability (T_g=81.9-91.6℃ with imide unite content of 2-10 ㏖%) compared to homopolymer (PET, T_g=78.9℃).

全南地方의 水稻白葉枯病菌 菌型과 그의 地域別 및 品種別 分布

朴淳直,金基淸,禹洪斗,崔容壽 全南大學校 農漁村開發硏究所 1986 農業科學技術硏究 Vol.21 No.-

This was carried out to identify the pathotypes of Xanthomonas campestris pv. oryzae collected from regional exhibition paddys and others in Jeonnam province, and to investigate the sub-regional and varietal distributions of them in 1982. Collected isolates were identified as pathotypes Ⅰ, Ⅱ, Ⅲ and 2 unknown groups with Korean differentials; Ⅰ, Ⅱ, Ⅲ, Ⅳ,Ⅴ and 4 unknown with Japanese; Ⅰ, Ⅱ and 2 unknown with IPPI's, respectively. The fact that unknown groups were isolated suggest that some differentiation is occurring among the previous pathotypes. Using Japanese differentials, pathotype was isolated from l1 sub-regions, Ⅱ and gⅢfrom 4, g from I, g from 3, and unknown 4 groups from 8, respectively. However, there was no sub-region where all 5 pathotypes were detected. Pathotypes with Japanese differentials was isolated from 6 varieties, Iri 346 and 347, Milyang 23 and 30, Jinjubyo and Nakdongbyo: pathotype Ⅱ from 6 varieties, Suvreon 294, Irl 342 and 347, Jinjubyo and Akihikari; pathotype Ⅲ from 5 varieties, Suweon 294, Iri 346, Milyang 30 and Nongrim 41; pathotype Ⅳ from 1 variety, Jinjubyo; pathotype V from 4 varieties, Suweon 294, Iri 347, Milyang 23 and Jinjubyo, respectively.

농촌 노인의 식품 기호도 조사

박기순,박영숙,김 순 순천향대학교 기초과학연구소 1996 순천향자연과학연구 논문집 Vol.2 No.2

A study about food preference of the elderly in rural area was performed to 110 home-living subjects by questionaires and personal interviews. We found that they prefered the sweet and hot than the salty and sour. Among five food groups vegetables and fruits were the most favorite food groups to the elderly. followed by meats, fishes, eggs and legumes. Fats, oils and sugars were the least favorite one. Cooked rice with legumes was the most liked food among the grains and starches. most of the elderly liked soy paste and soybean curd among meats, fishes, eggs and legumes and yogurt among milk and milk products. They liked dried seaweed, watermelon, percimon, lettuce, peach, chinese cabbage and cucumber among vegetables and fruits and enjoyed vegetable oils including sesami oil among fats and oils.

學生이 바라는 理想的 敎授像 : 文獻을 通해서 본

朴基順 東亞大學校 學生生活指導硏究所 1982 學生硏究 Vol.11 No.-

APSM의 예측능 평가에 관한 연구

박기학,윤순창 한국환경과학회 2003 한국환경과학회지 Vol.12 No.3

The Pasquill-Gifford stability category is a very important scheme of the Gaussian type dispersion model defined the complex turbulence state of the atmosphere by A grade(very unstable) to F grade(very stable). But there has been made a point out that this stability category might decrease the predictability of the model because it was each covers a broad range of stability conditions, and that they were very site specific. The APSM (Air Pollution Simulation Model) was composed of the turbulent parameters, i.e. friction velocity( u_*), convective velocity scale( w_* ) and Monin-Obukhov length scale( L ) for the purpose of the performance increasing on the case of the unstable atmospheric conditions. And the PDF (Probability Density Function) model was used to express the vertical dispersion characteristics and the profile method was used to calculate the turbulent characteristics. And the performance assessment was validated between APSM and EPA regulatory models(TEM, ISCST), tracer experiment results. There were very good performance results simulated by APSM than that of TEM, ISCST in the short distance (<1415 m) from the source, but increase the simulation error(%) to stand off the source in others. And there were differences in comparison with the lateral dispersion coefficient( σ_y) which was represent the horizontal dispersion characteristics of a air pollutant in the atmosphere. So the different calculation method of σ_y, which was extrapolated from a different tracer experiment data might decrease the simulation performance capability. In conclusion, the air pollution simulation model showed a good capability of predict the air pollution which was composed of the turbulent parameters compared with the results of TEM and ISCST for the unstable atmospheric conditions.

공급량 배분기법을 이용한 갈수기 병렬저수지 해석

박기범,이순탁 한국환경과학회 2006 한국환경과학회지 Vol.15 No.3