• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2003년도 가을 학술발표회 논문집
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• pp.209-210
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• 2003

The durability and anti-microbial stability of plastics, which have been thought to be favorable characteristics, cause ecoloical problems due to non-degradation after disposal. For a possible solution of these ecological and environmental problems, the biodegradable polymers. especially aliphatic polyesters, have been widely investigated. Poly(tetramethylene succinate)(PTMS) is one of the most promising biodegradable polyesters. (omitted)

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2001년도 가을 학술발표회 논문집
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• pp.13-16
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• 2001

최근 생분해성 고분자[1]의 유용성은 플라스틱 쓰레기의 처리에 관한 복합적인 문제점의 영향 때문에 많은 주목을 받고 있다 Aliphatic polyester는 생분해가능 혹은 퇴비로 사용 가능한 플라스틱 상품[2-4]의 용도로 가장 바람직한 구조를 가진 물질중의 하나이다. 이런 필요성의 대두로 poly(ethylene oxalate)(PEO)와 poly(butylene succinate)(PBS)[5-9]의 합성에 관해 많은 연구가 있었다. (중략)

• 미생물학회지
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• 제2권1호
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• pp.12-16
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• 1964

Lee, Yung Nok and Chin, Pyung (Dept. of Biology, Korea University, Seoul, Korea) : Action of ascorbic acid indoleacetic acid on the oxidation of succinate and coupled phosphorylation in Chlorella mitochondria. Kor. Jour. Microbiol., Vol.2, No.1, p12-16 (1964) Mitochondria were isolated from Chlorella ellipsoidea and the action of ascorbic acid and indoleacetic acid on the succinate oxidation and coupled phosphorylation in mitochondria suspension were examined. Oxidation of succinate used as substrate, and phosphorylation coupled to oxidation were strikingly enhanced by the addition of ascorbic acid, while in case of indoleacetic acid it were a little. In a view of phosphorylative efficiency, P/O ratio resulting from the addition of ascorbic acid was decreased and it may be considered as the result of a partial oxidation of ascorbate in mitochondria.

• 대한화학회지
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• 제43권6호
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• pp.682-690
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• 1999

사성분계 랜덤 공중합체인 poly(butylene glutarate-co-adipate-co-succinate-co-terephthalate)(PBGAST)를 합성하고 $^1H-NMR$ 분광분석법, 시차주사열량분석법(DSC) 및 X-선회절법 등을 시행하였다. PBGAST 공중합체의 융점거동과 결정화거동은 반응조건 뿐 만 아니라 공중합체내 terephthalate 단위의 함량에도 의존하였다.

• 대한수의학회지
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• 제29권4호
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• pp.425-431
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• 1989

This study was undertaken to investigate the changes of enzyme activities resulted from low concentrated carbon monoxide poisoning on the caudate nucleus in rat. The activities of cytochrome oxidase, succinate dehydrogenase and lactate dehydragenase were observed histochemically, after the experimental animals were poisoned to 100ppm carbon monoxide for 8 hours every day from one day to 16 days. The materials were sliced from coronal section at the level of the optic chiasm and immediately frozen sections of $10{\mu}m$ thickness were cut on the cryostat at $-15^{\circ}C$ and incubated in the medium containing substrate for histochemical detection of cytochrome oxidase, succinate dehydrogenase and lactate dehydrogenase. The sections were mounted in glycerol gelatin and observed under light microscope. It was obtained that cytochrome oxidase activity decreased moderately and succinate dehydrogenase activity showed marked or moderate activity during entire poisoning period and lactate dehydrogenase activity showed marked or moderate activity from one to 8 days but recovered to normal condition at 16th day.

• Macromolecular Research
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• 제16권7호
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• pp.651-658
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• 2008

Poly(butylene succiate) (PBS), poly(butylene succinate-co-L-lactate) (PBSL), and poly(butylene succinate-co-6-hydroxycaproate) (PBSCL) polymers were degraded by lipase $PS^{(R)}$, and the enzymatic degradation mechanism of PBS was analyzed in detail. The enzymatic degradation of PBS gave 4-hydroxybutyl succinate (4HBS) as the main product. An exo-type hydrolysis mechanism was proposed based on this observation. The terminal chain of PBS had conformational similarity to ordinary tri- and diglycerides and could be incorporated as a substrate in the active site of this lipase. The surface adsorption of the lipase was much larger on PBS and its copolymer films than on the other polyester films because the lipase adhered quite strongly to the polymer terminal through a specific adsorption mechanism. Kinetic analysis showed that the total number of surface adsorption points per unit area of PBSL and PBSCL copolymers was larger than that of the PBS homopolymer.

• 생약학회지
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• 제20권3호
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• pp.154-161
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• 1989

Effects of panaxydol, panaxynol and panaxytriol isolated from Panax ginseng C.A. Meyer on some enzyme activities were determined. Activities of ATPase, membrane-bound enzyme from Sarcoma 180 and rat liver were slightly inhibited by panaxydol. Activities of 5'-nucleotidase, membrane-bound enzyme and succinate cytochrome c reductase in mitochonidria from sarcoma 180 and rat livers were significantly inhibited in a dose-dependent manner by panaxynol. The inhibitory effects of panaxydol and panaxynol on succinate cytochrome c reductase activities were more potent than those on 5'-nucleotidase activities and panaxynol was found to be a very potent inhibitor of succinate cytochrome c reductase. Activities of glucose-6-phosphatase in endoplasmic reticulum from Sarcoma 180 and rat livers were not affected by all three polyacetylenes. These results suggested that the inhibitory effects of panaxydol and panaxynol on enzyme activities might contribute to their biological activities.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2001년도 학술발표회 논문집(Proceedings of the Korean Textile Conference)
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• pp.13.1-16
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• 2001

• 청정기술
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• 제8권4호
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• pp.223-228
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• 2002

다양한 화학구조를 포함하는 폴리에스테르를 분해성 수지인 셀룰로오스와 비분해성 수지인 PVC 및 PE를 기준물질로 한 controlled compost test와 soil burial test를 적용하여 생분해 거동을 살펴보았다. 이들 고분자의 화학구조가 유연한 지방족 사슬과 에스테르기를 가지고 있는 지방족 폴리에스테르는 가수분해 효소에 의해 분해되고, 방향족 고리를 포함하는 공중합 형태의 폴리에스테르는 상대적으로 낮은 생분해도를 보여주었다. 조절된 퇴비화 조건에서 셀룰로오스가 45일에 70.6%의 분해도를 보일 때, 합성된 poly(butylene adipate-co-succinate), poly(butylene succinate), poly(butylene adipate-co-succinate-co-terephthalate)는 각각 44.0%, 32.0%, 23.4%,의 생분해도를 보여주어 이들 고분자의 화학적 구조에 따라 생분해거동이 많은 영향을 받음을 확인하였다.

• 공업화학
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• 제19권2호
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• pp.179-184
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• 2008

숙신산은 식품, 의약, 화장품 등의 생산에서 중요한 화학물질로 부각되고 있으며, 향후 많은 분야에 사용될 가능성이 큰 원료물질이다. 일반적인 화학합성법과는 달리, 바이오매스와 환경 친화적 생물공정에 의해 생산되는 숙신산은 주로 염의 형태로 존재하므로 무기이온 제거를 위한 후속공정으로 전기투석공정이 반드시 필요하다. 전기투석 공정의 최적화를 위해 전압, 농도, pH 등의 인자 중에서 반응변수(response)인 탈염도 및 에너지 소비량에 영향을 주는 인자 선정 및 그 중요도 분석을 실험계획법을 이용하여 수행하였다. 2 수준 3인자 완전 요인 설계표에 의거하여 실험을 수행하였고, 실험결과의 미니탭 분석을 통해 전압이 가장 중요도가 큰 인자임을 알았다. 또한, 반응변수 최적화 도구를 이용하여 반응변수의 목표 값을 만족시키는 인자의 최적 조합을 찾고자 하였다. 한편, 전하를 띄지 않는 발효잔류물이 탈염에 미치는 영향을 조사하기 위해 농축 발효 옥수수 침출물, 이스트 추출액, 덱스트로즈 등의 함량에 따른 숙신산염의 탈염도 변화를 고찰하였다.