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박명근,Chang-Hao Cui,Sung Chul Park,박슬기,김진광,Mi-Sun Jung,정석채,김선창,임완택 한국미생물학회 2014 The journal of microbiology Vol.52 No.5
The focus of this study was the cloning, expression, andcharacterization of recombinant ginsenoside hydrolyzingβ-glucosidase from Arthrobacter chlorophenolicus with anultimate objective to more efficiently bio-transform ginsenosides. The gene bglAch, consisting of 1,260 bp (419 aminoacid residues) was cloned and the recombinant enzyme, overexpressedin Escherichia coli BL21 (DE3), was characterized. The GST-fused BglAch was purified using GST·Bind agaroseresin and characterized. Under optimal conditions (pH 6.0and 37°C) BglAch hydrolyzed the outer glucose and arabinopyranosemoieties of ginsenosides Rb1 and Rb2 at the C20position of the aglycone into ginsenoside Rd. This was followedby hydrolysis into F2 of the outer glucose moiety ofginsenoside Rd at the C3 position of the aglycone. Additionally,BglAch more slowly transformed Rc to F2 via C-Mc1(compared to hydrolysis of Rb1 or Rb2). These results indicatethat the recombinant BglAch could be useful for theproduction of ginsenoside F2 for use in the pharmaceuticaland cosmetic industries.
박명근,최성호 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-
The fierce competition between the carriers has made domestic mobile communication industry run up rapidly. Instead of such dazzling outward growth, however, the activation effect of such competition is not enough for our expectation in the view point of the mobile communication users. The several related surveys say that the dissatisfaction of the users has been increasing. This appearance has the root in the peculiar market structure where the carrier can exercise its exclusive possession after the secure of its subscribers. In the study, we look into the introduction case of the European MVNO system, and examine the introduction validity of MVNO system to Korea with the considering of the recent mutation trend in domestic mobile communication market.
박명근 ( Park Myeong Keun ),서승덕 ( Suh Seung Duk ),이순혁 ( Lee Soon Hyuk ),맹승진 ( Maeng Sung Jin ) 한국농공학회 1996 韓國農工學會誌 : 전원과 자원 Vol.38 No.4
This study was conducted to simulate long series of synthetic monthly flows by multi-season first order Markov model with selection of best fitting frequency distribution, harmonic synthetic and harmonic regression models and to make a comparison of statistical parameters between observes and synthetic flows of five watersheds in Geum river system. The results obtained through this study can be summarized as follow. 1. Both gamma and two parameter lognormal distributions were found to be suitable ones for monthly flows in all watersheds by Kolmogorov-Smirnov test. 2. It was found that arithmetic mean values of synthetic monthly flows simulated by multi-season first order Markov model with gamma distribution are much closer to the results of the observed data in comparison with those of the other models in the applied watersheds. 3. The coefficients of variation, index of fluctuation for monthly flows simulated by multi-season first order Markov model with gamma distribution are appeared closer to those of the observed data in comparison with those of the other models in Geum river system. 4. Synthetic monthly flows were simulated over 100 years by multi-season first order Markov model with gamma distribution which is acknowledged as a suitable simulation modal in this study.
년초과치(年超過値) 계열(系列)의 홍수빈도(洪水頻度) 분석(分析) 관(關)한 연구(硏究) - 금강(錦江) 유역(流域)을 중심(中心)으로 -
박명근 ( Myeong Keun Park ),이순혁 ( Soon Hyuk Lee ) 한국농공학회 1982 韓國農工學會誌 : 전원과 자원 Vol.24 No.1
This study was attempted to find best fitted distribution and the equations for probable maximum flow with the evaluation of parameters by the method of moment for the rat-ional design of hydraulic structures in the annual exceedance series. Six subwatersheds were selected as studying basins along Geum River basin. The results obtained through this study were analyzed and summarized as follows. 1. Fitted probability distribution was showed in the order of Three Parameter Lognorm-al, Type 1 Extremal, Exponential, Pearson Type III, and Log Pearson Type III distribu-tion as the results of x<sup>2</sup> goodness of fit test. 2. Kolmogorov-Smirnov test showed in the order of Three Parameter Lognormal, Exp-onential' Pearson Type III, Log Pearson Type III and Type 1 Extremal distribution for the fitted probability distribution. 3. It can be concluded that Three parameter Lognormal distribution is a best fitted one among some other distributions out of respect for each both tests. 4. An Exponential distribution was proposed as a suitable one by Chow, V.T. showed lower fittness than that of Three Parameter Lognormal in Geum River basin. 5. Probable flood flow equations followins the return periods for each station were obt-ained by Three Parameter Lognormal distribution. 6. It is urgently essential that best fitted probability distribution should be established for the annual exceedance series in the main river systems of Korea.