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.

글로벌 시장에서 중소기업의 기업가정신과 시장지향성에 관한 연구

정인식,김은미 한국산업경영학회 2012 한국산업경영학회 발표논문집 Vol.2012 No.-

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 국제시장지향성을 국제시장지향성의 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.

Famotidine에 의한 섬망 1예

정인식,이강문,안병민,박두호,이동수,김상우,송호진,양영상,채현석 대한소화기학회 2001 대한소화기학회지 Vol.37 No.2

The use of histamine (H₂)-receptor blockers has been associated with central nervous system (CNS) toxicities manifesting as delirium, mental confusion, dizziness, and hallucination. Elderly patients with renal or hepatic dysfunction are more susceptible to these adverse reactions. Most of these reactions have been reported with both cimetidine and ranitidine. Famotidine, one of H₂ blockers, has been shown to be effective in improving symptoms and healing gastrointestinal lesions. Since 1986, an estimated 18.8 million worldwide patients have been treated with famotidine, but CNS adverse reactions associated with famotidine have been reported very rarely. The authors report a case of famotidine-associated delirium in an elderly patient with mild renal insufficiency, which was cleared completely after stopping the administration of famotidine.

박막형 크로멜-알루멜 다중접합 열전변환기

정인식,김진섭,이정희,이종현,신장규,박세일,권성원,Jung, In-Sik,Kim, Jin-Sup,Lee, Jung-Hee,Lee, Jong-Hyun,Shin, Jang-Kyoo,Park, Se-Il,Kwon, Sung-Won 대한전자공학회 1999 電子工學會論文誌, D Vol.d36 No.9

박막형 다중접합 열전변환기의 시간에 따른 출력 전압 변화를 감소시키기 위해 벌크의 저항온도계수가 매우 적은 EVANOHM-S 합금을 박막 히터재료로 사용하였고, 또한 Seebeck 계수차이가 비교적 작은 크로멜-알루멜 열전쌍을 박막 열전퇴(thermopile)의 열전요소로 하였다. EVANOHM-S 박막 히터의 저항온도계수는 약 $1.4 {\times} 10^4/^{\circ}C$ 였고, 크로멜-알루멜 박막 열전쌍의 Seebeck 계수차이는 약 $38 {\mu}V/K$였다. 열전변환기의 출력 전압 변화는 공기중에서 처음 120초 동안 약 0.06%였고, 약 5분간이상 히터의 예열후 출력전압 변화는 현저히 감소하였다. 10 Hz ~ 10 kHz의 주파수 범위에서 열전변환기의 교류-직류 전압 및 전류 변환 오차범위는 각각 ${\pm}$1.6 ppm 및 ${\pm}$0.7 ppm이었고, 10Hz 이하 또는 10 kHz 이상의 주파수에서는 교류-직류 변환오차가 크게 증가하였다. For the purpose of reducing the output voltage fluctuation of thin film multijunction thermal converter, EVANOHM alloy-S and chromel-alumel thermocouple were used as a thin film heater material and as a thermoelement of thrmopile, respectively. The temperature coefficient of the resistance of thin film EVANOHM alloy-S heater was about $1.4 {\times} 10^4/^{\circ}C$, which is very small compared to other materials, and thin film chromel-alumel thermocouple showed relatively small difference of the Seebeck coefficients about $38 {\mu}V/K$. The output voltage fluctuation of the thermal converter was about 0.06% for the initial 120 seconds in air and decreased considerably after preheating for 5 minutes or more. The respective AC-DC voltage and current transfer error ranges of the thermal converter were about ${\pm}$1.6 ppm and ${\pm}$0.7 ppm in the frequency range from 10Hz to 10 kHz and increased remarkably below 10 Hz or above 10 kHz.

An Empirical Study of Product Strategy in International Markets

정인식,초수봉,김은미 한국전략마케팅학회 2011 마케팅논집 Vol.19 No.4

Despite of its importance both for developing competitive advantages and enhancing performance outcomes for a firm in international market, the research on product strategy has not received adequate interest in international marketing literature over past decades. From these views, this study addresses two questions: (1) How should exporting firms choose their product strategies? (2) What effects do product strategies have on firm performance? To answer these questions, we examine the relationships among firm characteristics, product strategies and firm performance in Korean context. Based on 203 Korean exporting firms, the empirical findings of the present study suggest that firm characteristics are related to product strategies, which in turn influence firm performance. Understanding the nature of marketing strategies employed by Korean exporters as well as its antecedents and effects may provide a useful reference point for exporters from other newly industrialized economies (NIEs).

간 전이를 일으킨 작은 직장 유암종 1 예

정인식,선희식,이창돈,안창혁,김성수,한석원,채현석,최규용,강지호,조재완 대한소화기내시경학회 2000 Clinical Endoscopy Vol.21 No.4

Carcinoid tumors are originated from the enterochromaffin cells in the gastrointestinal mucosa, The incidence of rectal carcinoid tumors is more than 10 percent of gastrointestinal tract carcinoid. The tumor has naturally the benign character that does not develop symptoms and it is found incidentally. The tumor may infrequently have a malignant behavior such as invasion to muscle wall, obstruction of bowel lumen and metastasis to distant organ (especially, liver) almost when its size is larger than 2 cm. We have experienced a case of rectal carcinoid tumor smaller than 1 cm in its size with huge metastatic mass of liver.

유-무기 이온교환제를 이용한 방사성 세탁폐액 내 방사성핵종의 처리

정인식,신원식,최상준 한국방사성폐기물학회 2009 한국방사성폐기물학회 학술논문요약집 Vol.7 No.2

간경변증 환자에서 상부소화관 출혈에 대한 임상적 고찰

정인식,한상원,김재광,김부성,박두호,이창돈,김성수,오수혁,윤승규,최명규 대한소화기내시경학회 1995 Clinical Endoscopy Vol.15 No.1

It is well known that the main source of upper gastrointestinal(UGI) bleeding in patients with liver cirrhosis is the variceal rupture of esophagus. But, peptic ulcer disease, congestive gastrophathy, and gastric varices are frequently found by endoscopic examination in patients with liver cirrhosis. These lesions are related to UGI bleeding. It is necessary to verify the causes of bleeding in liver cirrhosis, and evaluate the influencing factors related with UGI bleeding, and define the endoscopic findings of bleeding in liver cirrhosis. We reviewed the records of 145 episodes of UGI bleeding in cirrhosis, with endoscopy performed within 24 hours of entry, and report here the bleeding sites, influencing factors related with UGI bleeding, and endoscopic findings. The most common bleeding site was the esophageal varices(66.9%). Other bleeding lesions included gastric ulcer(8.3%), congestive gastrophathy(6.9%), undetermined origin(6.9%), duodenal ulcer(6.2%), gastric varices(2.1%), esophageal varices+gastric ulcer(1.4%), and esophageal varices+duodenal ulcer(1.4%). Endoscopic features of bleeding esophageal varices were identified as Spurting(2.1%), Oozing(11.3%), Red plugh(10,3 %), White plugh(14.4%), and Red-color sign(61.9%). In bleeding esophageal varices, gradeIV varices(41.2%) had a significantly higher association with bleeding than gradeI varices(2.1%), gradeII varices(22.7%), and gradeIII varices(34.0%). Endoscopic features of bleeding gastric ulcer were identified as Spurting(8.3%), Oozing(25.0%), Blood clots(58.3%), and Exposed blood vessels on ulcer base(41.7%). Endoscopic features of bleeding duodenal ulcer were identified as Oozing(44.4%), Blood clots(55.6 %), and Exposed blood vessels on ulcer base(55.6%). We found no difference in the bleeding sources according to etiology of cirrhosis(P$gt;0.05). Bleedings due to the variceal rupture of esophagus were more frequently found in Child class B(71.2%) and C(75.0%) than A(34.8%)(P$lt;0.05).

브랜드 글로벌성과 소벼자 구매 행동에 대한 연구

정인식,김귀곤 한국국제경영관리학회 2004 국제경영리뷰 Vol.8 No.1

만성위장질환의 예방

정인식 한국만성질환관리협회 1994 월간성인병 Vol.163 No.-