세균성 PROTEASE 의 정제(精製)에 관한 연구

서정훈,우두리 한국농화학회 1969 Applied Biological Chemistry (Appl Biol Chem) Vol.11 No.1

The purification methods of bacterial protease have been published by many workers, especially by the using of ion exchange resins. But in the practical application to obtain a comparatively purified enzyme, the known methods do not give always a satisfiable results. Here we developed an industrially applicable method for purification of bacterial protease with the using of tannin. By the adaptation of the optimal conditions of this method on the purification, a 150000 unit/g.(Fuld Gross unit) of protease sample could obtained.

공립대안학교는 지금-전북동화중을 찾아서

서정훈 열린전북 2012 열린전북 Vol.152 No.-

설국

서정훈 열린전북 2013 열린전북 Vol.158 No.-

연꽃 같은 당신을 기다린다.

서정훈 열린전북 2013 열린전북 Vol.164 No.-

“라면 먹고 가라는 말에 넘어가지 마세요”

서정훈 전주국제발효식품엑스포 조직위원회 2005 발효 : 맛있는 잡지 Vol.1 No.1

유쾌한 소리여행!

서정훈 열린전북 2013 열린전북 Vol.165 No.-

韓國人 兒童의 顔面輪廓에 關한 頭部放射線學的 硏究

張英一,南東錫,梁源植,徐廷勳 대한치과교정학회 1976 대한치과교정학회지 Vol.6 No.1

This study was undertaken to investigate the values of the cephalometric standards of Korean children which consisted of 57 boys and 61 girls with normal occlusion and harmony of the facial musculature. The following conclusions were obtained. 1) The relatively vertical inclination of nasal bone and flat contour of the frontal bone contribute to the flattening of the upper face. 2) Slight lack of chin prominence characterizes the lower face while procumbent incisors and their alveolar bone dominate the middle face. 3) A caudal skull base inclination is probably the most specific feature for Korean.

Angle I 級 不正咬合者의 第二大臼齒 石??化 過程에 關한 硏究

徐廷勳 대한치과교정학회 1983 대한치과교정학회지 Vol.13 No.2

To study the calcification of second molars in Class Ⅰ malocclusion with normal craniofacial structure, the author examined cephalograms, orthopantomograms, periapical films of 538 children from 7 y 0m to 15y 11m old who had ClassⅠ malocclusion with normal craniofacial structure, and observed the calcification stage of upper and lower second molars. The results are as follows. 1. The mean ages of crown completion of upper and lower second molars are 8.82±1.14, 8.72±0.75 in boys, and 8.60±1.46, 8.22±0.92 in girls. 2. The mean ages of root completion of upper and lower second molars are 14.25±1.46, 14.15±0.83 in boys, and 14.12±0.93, 14.15±0.83 in girls. 3. There are no difference between the calcification stages of upper second molars and those of lower second molars in both sexes.

전치부 반대교합 아동의 비강통기도에 관한 연구

안순찬,서정훈 대한치과교정학회 1992 대한치과교정학회지 Vol.22 No.1

This study was designed to analyze nasal respiratory patency and its correlation with skeletal components in growing children with anterior crossbite. The subjects consisted of 40 control patients, 24 nose breathers with anterior crossbite and 18 mouth breathers with anterior crossbite. The mean age was 11.4 years in the control group, 10.1 years in nose breathing group and 9.5 years in mouth breathing group. The results were as follows. 1.In anterior crossbite group, and nasal respiratory airflow rates(N.R.A.R.) was significantly lower than that of control group regardless of nasal decongestants application. 2.The N.R.A.R. of mouth breathers with anterior crossbite in male group was significantly lower than that of mouth breathers, but increased to the level of control group after nasal decongestants application. But in female group, the N.R.A.R. was significantly lower in mouth breathing group at both conditions. 3.Mouth breathing group showed smaller anterior vertical nasal cavity height (ANS-ANS') lower upper anterior facial height ratios (N-sp'/N-Me) and higher maxillary occlusal plane ratios(OL-ML/ML-NL) than those of nose breathing group with anterior crossbite. 4.Items showing nasal height (ANS-ANS', PNS-PNS'), anterior upper facial height ("N-sp') was were strongly correlated with N.R.A.R. at 150 pascal in inspiration. But item showing maxillary occlusal plane ratios (OL-ML/ML-NS) was negatively correlated with N.R.A.R. at 150 pascal in inspiration. 5.There were forward tongue position in mouth breathing group, but it was not significantly correlated with N.R.A.R. at 150 pascal in inspiration.

글로벌 금융위기 이후 엔화 약세 변동이 KOSPI 효율성에 미친 영향

서정훈,이상빈,곽동철 한국국제경영관리학회 2017 국제경영리뷰 Vol.21 No.4

This study empirically analyzed how quantitative easing which is called as “Abenomics” conducted by the Bank of Japan (BOJ), affected the Korean stock market efficiency. In addition, we examined whether the main factor influencing the efficiency is the change in the yen value. We also examined which industries among the KOSPI industries are negatively or positively affected by the yen weakness. Empirical analysis shows that the undervaluation of yen value (yen depreciation) by Abenomics does not increase the KOSPI efficiency at least as much as before the Abenomics policy. In addition, for verification of efficiency, the efficiency of the stock price did not increase than before even if the portfolios were structured in the industries to control the effects of industry specific factors which are related to volatility and to consider only the quantitative easing effects by the BOJ. Next, as a result of the volatility of yen value caused by quantitative easing of the BOJ, which affects were influenced to the volatility of KOSPI's industries, it is confirmed that the KOSPI’s industries which have inefficiently by fluctuations in yen value are Pharmaceuticals, transportation equipments (Including automobile industries), banks and telecommunications industries. It is analyzed that wide influence for the industries by the volatility inefficiency are transportation equipment and banking industries , and decrease influence for the industries by volatility inefficiency are drugs and telecommunication industries. As a result of the analysis, the undervaluation of yen value (yen depreciation) by the BOJ quantitative easing has been analyzed to be a factor for instability in the overall financial economy in general. Since the quantitative easing policy of the yen cannot be sustained indefinitely, how to maintain the robustness of the Korean economy and the efficiency of the capital market at the time when the yen's liquidity diminishes is an important issue in the future. Therefore, it is a part that should be further investigated about this point, but it is beyond the scope of this study, so it is left as a future study. 본 연구는 일본중앙은행(BOJ)이 실시한 아베노믹스로 일컬어지는 양적완화가 우리나라 주식시장 효율성에 어떠한 영향을 미쳤는지 실증적으로 분석하였다. 또한, 효율성 여부에 주요 요인이 엔화 가치 변동에 따른 것인지에 대해서도 조사하였으며, 이를 통해 KOSPI산업들 중 어느 산업이 엔화 약세의 부정적 또는 긍정적 영향을 크게 받는지 살펴보았다. 실증분석 결과, 아베노믹스에 의한 엔화 가치의 저평가(엔화 약세)는 KOSPI 효율성을 아베노믹스 정책 이전보다 적어도 증가시키지 않는 것으로 나타났다. 또한 효율성 검증 시, 변동성과 관련된 산업별 특정 요인의 효과를 통제하고 BOJ에 의한 양적완화 효과만을 고려하기 위해 해당 산업들로 포트폴리오를 구성한 경우에도 주가에 대한 효율성은 이전보다 증가하지 않았다. 다음으로 BOJ의 양적완화에 의한 엔화 가치 변동이 KOSPI의 산업별 주가변동성에 어떠한 영향을 미쳤는가에 대한 결과, 엔화 가치 변동에 의해 비효율적으로 변동성이 영향을 받은 KOSPI산업은 의약품, 운수장비(자동차산업포함), 은행, 통신산업으로 나타났다. 이 중 변동성의 비효율성이 확대되는 쪽으로 영향을 받은 산업은 운수장비와 은행산업이었고, 변동성에 비효율성이 감소되는 쪽으로 영향을 받은 산업은 의약품과 통신산업인 것으로 분석되었다. 전체 분석결과를 통해 볼 때, BOJ 양적완화에 의한 엔저는 국내 금융경제 전반에 대체적으로 불안정성을 키우는 요인인 것으로 분석되었다. 이러한 엔화의 양적완화 정책은 무제한적으로 지속될 수 없는 정책이기 때문에 엔화의 유동성이 축소되는 시점에서 우리 경제의 강건성과 자본시장의 효율성을 어떻게 유지할 수 있을 것인지는 향후 중요한 이슈이다. 따라서 이 점에 대해서도 연구가 추가로 이루어져야하는 부분이지만 본 연구의 범위를 넘어서기 때문에 추후 연구과제로 남겨둔다.