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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.
5'-Untranslated Region에 존재하는 Iron Responsive Element에 의한 Ferritin 합성조절
정인식,이중림,김해영,Chung, In-Sik,Lee, Jung-Lim,Kim, Hae-Yeong 한국응용생명화학회 1998 Applied Biological Chemistry (Appl Biol Chem) Vol.33 No.2
철의 대사과정에 관여하는 ferritin 단백질의 발현은 ferritin transcript의 5'-untranslated region에 위치한 iron-responsive element (IRE)와 철 농도 조절 단백질의 결합에 의해 조절된다. 이러한 ferritin의 생성에 관여하는 구조적인 요소를 밝히기 위해, RNA 이차구조인 IRE의 bulge 부분을 다른 염기로 변환시켜 철 농도 조절단백질에 의한 RNA 결합력과 ferritin 단백질의 생성의 저해정도를 비교 측정하였다. 측정된 결과로부터 IRE의 bulge 부분의 시토신 염기배열만이 RNA 이차구조의 형성에 중요한 작용을 하여 ferritin 합성을 조절할 수 있는 것을 보였다. The expression of ferritin involved in iron metabolism is regulated at the translational level by the interaction of iron regulatory protein with iron-responsive element(IRE) in the 5'-untranslated region of ferritin transcript. To identify the role of structural element utilized for translational regulation of ferritin, we studied the effects of mutations in the ferritin IRE by measuring IRP binding activity and translational activity. Our data suggest that the cytosine at bulged position of IRE within ferritin is important for the formation of RNA secondary structure involved in translational regulation.
정인식,박두호,차상복,장기육,최규용,오수혁,채현석 대한소화기내시경학회 1997 Clinical Endoscopy Vol.17 No.2
Ectopic pancreas is commonly located at stomach, duodenum and jejunum. It is a relatively rare entity and is usually of no clinical importance which especially is a very rare source of massive upper gastrointestinal bleeding. We have recently experienced a case of an ectopic pancreas in the second portion of the duodenum which was proven to be a source of massive gastrointestinal bleeding by duodenoscopy and was confirmed by surgical exploration.
Fuctional Relationship between Depredicate Nouns, Their Arguments and Their Prepositions
정인식 신영어영문학회 2007 신영어영문학 Vol.36 No.-
This paper explores a functional relationship between prepositions before and behind depredicate NPs. First, it addresses depredicate NPs in their relationship to the corresponding finite clauses, showing the occurrence of arguments not only in genitive forms and of phrases but also in other prepositional phrases as notional case markers. It also shows that there is a close relation between the word order of a SVO sentence and that of a depredicate NP and that there is a considerable consistency between both of them in a variation of a word order with regard to the discourse-familiarity of Prince (1981). Furthermore, in a combination of a preposition and its nominalized object, the former is influenced by the latter and behaves like a conjunction.