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Pachysolen tannophilus 의 고농도 Inocula 를 이용한 Hemicellulose hydrolyzate 의 알코올 발효
정인식,한태룡 한국농화학회 1987 Applied Biological Chemistry (Appl Biol Chem) Vol.30 No.4
High-level yeast inocula was investigated as a means of overcoming the inhibition problem in ethanol fermentation of hemicellulose hydrolyzate. When the inoculum exceeded 25g dry cells/liter, the fermentation proceeded completely to the end within 24 hours. Furfural was taken up by Pachysolen tannophilus and catabolized to furfuryl alcohol. Thus inhibitory effect of furfural component was less adverse toward ethanol production than that of non-furfural components in hemicellulose hydrolyzate. The specific ethanol productivity in the fermentation of hemicellulose hydrolyzate was 14% of that of simulated media containing 41.8g xylose and 2.3g furfural per liter.
정인식,김부성,박두호,이창돈,차상복,박성규,채현석,방춘상,이보인,윤종현,정용학 대한내과학회 1997 대한내과학회지 Vol.53 No.3
Systemic lupus erythematosus is a disease of unknown cause which involves various organs and primary involvement of urinary bladder is very rare. We experienced a case of a female patient with SLE and urologic manifestations (interstitial cystitis, hydroureters and hydronephrosis), which were resolved spontaneously without any immunosuppressive therapy. There was no significant correlation between clinical course and disease activity index.
글로벌 시장에서 중소기업의 기업가정신과 시장지향성에 관한 연구
정인식,김은미 한국산업경영학회 2013 경영연구 Vol.28 No.3
국제기업가정신과 국제시장지향성은 중소기업의 부족한 내부 자원의 한계를 극복하고 보다 효과적으로 해외 경영 활동을 할 수 있는 중요한 수단으로 인식되고 있다. 이에 본 연구에서는 중소기업의 국제기업가정신과 국제시장지향성, 수출성과 간 관계를 살펴보고자 하였다. 특히 국제시장 지향성을 국제기업가정신의 선행변수로 보았으며 경영자의 해외 시장에 대한 적극적이고 혁신적인 행동이 국제시장지향성을 뒷받침할 경우 기업의 성과에 긍정적인 역할을 한다는데 초점을 두었다. 또한 기업 내부 특성은 경영 효율성을 높이는 효과적인 수단으로 작용한다는 점에서 국제시장지향성과 수출 성과 간 관계에 대해 기업 규모 및 제품 특징, 국제 경험의 조절효과를 알아보고자 하였다. 한국 중소기업을 대상으로 한 실증분석 결과, 국제기업가정신을 통해 해외 시장에 대한 능동적이고 혁신적인 태도가 국제시장지향성을 강화시키고, 이를 바탕으로 해외 시장 내 중소기업의 수출 성과를 향상시킨다는 가설이 지지됨을 살펴볼 수 있었다. 또한, 기업 규모가 작을수록 조직 내 정보의 원활한 공유 및 활용이 가능하다는 가설 역시 지지됨을 알 수 있었다. 해외 시장 내 중소기업의 경영 활동에 영향을 미치는 주요 요인으로써, 독립적으로 연구가 진행되던 국제기업가정신과 국제시장지향성을 구조적으로 연결함으로써 향후 이와 관련한 선행요인 및 결과요인에 관한 추가적인 연구가 활발하게 이루어질 수 있을 것으로 기대된다. As the growing participation of small and medium sized enterprises(SMEs) in international markets, international entrepreneurship and international market orientation are considered primary menas of overcoming lack of organizational resources and creating sustainable values. This study focuses on the relationship between entrepreneurship, market orientation, and performance in SMEs actives in international markets. Especially, this study considers international market orientation as both a consequent phenomenon of international entrepreneurship and a systematic safeguard against undue risk-taking tendency. An international business can achieve market orientation’s full potential when driven by international entrepreneurship, appropriate organizational design, and structure. This study also examines the moderating effects of firms’ internal factors on the link between international market orientation and performance, because the firm characteristic resources are effective means by which SMEs improve its efficiency and effectiveness. The findings of this study indicate that international entrepreneurship enhances international market orientation, and market orientation improves performance in international markets. In addition, the result shows that the positive effect of international market orientation on performance is stronger when firm size is smaller, because of sharing market information more effectively across organizational functions. This study will be helpful to adjust other research streams and build new ideas of SMEs’ business and marketing activities in international markets.
Clostridium Difficile 에 의한 위막성 장염 1예
정인식,조성민,이창돈,이완국,정규원,선희식,정환국,김경희 대한소화기내시경학회 1985 Clinical Endoscopy Vol.5 No.1
Pseudomembranous colitis (PMC) was first described by Finney as postoperative diphtheritic enteritis in 1893 and was known to be associated with antibiotics by Reiner et al in 1952. Most cases of antibiotic-associated PMC are now associated with cytotoxigenic C. difficile. The association of PMC several antibiotics is well docamented; however, its association with clindamycin appeared to be most striking. We experienced a male patient who developed tarry stool, abdominal pain and diarrhea after having recieved clindamycin for two weeks. The PMC diagnosed by colonofiberscopy with biopsy and C. difficile was identified by tissue-culture study. The patient was treated by oral vancomycin and healed. Described here a case of PMC with some review of literature.
경미한 미란성 식도염에서 식도 운동 및 위산 역류의 양상
정인식,김재광,김병욱,박재명,김보경,최황,최명규,선희식,최지현,박두호,한석원,문성배,김상우,정규원 대한소화기내시경학회 1999 Clinical Endoscopy Vol.19 No.5
Background/Aims: The major complications of reflux esophagitis are stricture formation and Barrett's esophagus. In Korea, the incidence of these complications is low and most patients with reflux esophagitis undergo a mild clinical course. The purpose of this study was to investigate patterns of acid reflux and esophageal motility in mild reflux esophagitis in Korea. Methods: Using conventional manometry and 24-hour ambulatory pH monitoring, we were investigated esophageal motility and patterns of gastroesophageal reflux in 41 patients with reflux esophagitis Savary-Miller (S-M) Ib using on endoscopy. The total supine, and upright reflux periods, as well as frequency and duration of reflux episodes were determined from the 24-hour pH monitoring record using standard software. Pathologic reflux was defined when the percentage of the total time with pH less than 4 (acid exposure time) exceeded 4%. Results: Pathologic reflux was observed in 17 patients (41.5%), who were categorized into upright refluxers (70.6%), supine refluxers (11.8%), and combined refluxers (17.6%). Patients with reflux esophagitis did not differ in lower esophageal sphincter pressure from the normal subjects. There were two patients (4.9%) with a lower esophageal pressure ≤ 10 mmHg and four patients (9.8%) with hiatal hernia. Failed peristalsis was seen in 4 patients (9.8%). Conclusions: A high proportion of upright reflux and low incidence of esophageal peristaltic dysfunction may contribute to the low incidence of stricture formation and Barrett's esophagus in patients with mild reflux esophagitis in Korea.
정인식,이강문,박두호,이동수,김상우,송호진,복현정,양영상,하병화,손성현,왕준호 대한소화기내시경학회 2000 Clinical Endoscopy Vol.20 No.6
Double pylorus is either a congenital abnormality or an acquired complication of peptic ulcer disease. An accessory channel normally connects the lesser or greater curvatore of the prepyloric antrum with the duodenal bulb. Three cases of double pylorus, an unusual complication of peptic ulcer disease is herein reported. A peptic ulcer lay in the accessory channel in all cases. In one of the cases, the fistula closed spontaneously after Helicobacter pylori eradication. The remaining 2 patients became asympto-matic despite the persistence of the accessory channel.