• KSBB Journal
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• v.15 no.2
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• pp.188-194
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• 2000

The anaerobic bacterium P. productus was known to produce acetate from CO, C02 and H2. In this research the acetate f formation from waste gas was studied. For this research, kinetic parameter study on CO conversion were carried out. From t this study maximum CO conversion rate of 39.3 mmol/L . hr . 0.0 and Km of 0.578 atm were obtained. Also the effect of c CO refreshment, N source, initial pH and c비ture temperature on acetate formation were studied. Acetate formation in 5L lab s scale fermenter was tested and specific acetate production rate of 0.48 g/L-hr-O.O. was obtained and the acetate c concentration was 21 g/L.

• Proceedings of the Korean Fiber Society Conference
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• 2002.04a
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• pp.25-28
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• 2002

비공역형 단량체인 비닐아세테이트(VAc)는 공역형 비닐계 단량체와 달리 라디칼의 활성이 너무 커서 중합 도중 빈번한 연쇄이동반응과 정지반응에 의해 분지구조의 고분자가 얻어지며 고분자량의 폴리비닐아세테이트를 얻기가 어려운 것으로 알려져 있다. 폴리비닐알코올(PVA)은 비닐알코을 단량체의 호변이성질화 때문에 단량체의 직적중합에 의해서는 얻을 수 없고 일반적으로 비닐아세테이트(VAc)를 라디칼 중합하여 얻어진 폴리비닐아세테이트(PVAc)를 비누화하여 합성한다. (중략)

• Proceedings of the Korean Fiber Society Conference
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• 1995.10a
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• pp.20-20
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• 1995

• Korean Journal of Food Science and Technology
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• v.49 no.3
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• pp.331-337
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• 2017

To evaluate the antioxidant activity of hexane, ethyl acetate, and butanol fractions obtained from Agastache rugosa extract, we measured the total polyphenol levels, DPPH radical scavenging activity, and reducing power. The ethyl acetate fraction of A. rugosa (AREA) displayed high phenolic levels, potent DPPH radical scavenging effect, and powerful reducing power. In addition, we examined the ability of AREA to inhibit nitric oxide (NO) production in lipopolysaccharide (LPS)-activated BV-2 microglia. AREA suppressed NO production and inducible nitric oxide synthase (iNOS) expression and downregulated interleukin-6 (IL-6) mRNA level in LPS-stimulated BV-2 microglia. Furthermore, we detected rosmarinic acid in AREA by HPLC, which suggested that rosmarinic acid could be one of the bioactive materials responsible for the antioxidant and anti-inflammatory activities of AREA. These results suggested that AREA may be a good source of functional foods with antioxidant and anti-inflammatory activities.

• KSBB Journal
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• v.11 no.1
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• pp.100-106
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• 1996

The extraction of taxol and baccatin III from the ground needles of Taxus cuspidata were carried out by using supercritical carbon dioxide with and without cosolvents such as ethylacetate and methanol at 300 bar and 313K. Taxol is a promising anticancer agent and baccatin III is a precursor of semisysthesis of taxol. The taxol and baccatin III contents in the extracts were determined by a HPLC. The highest yields of taxol and baccatin III could be obtained by the supercritical extraction with 3wt% methanol and ethylacetate, respectively, as cosolvents. It was also found that the selectivity of taxol and baccatin III were 0.117 and 1.245wt%, respectively, with 0.7wt% ethylacetate, which demonstrated that the selectivity of taxol and baccatin III were increased about 1.8 and 19 times than those of conventional organic solvent extraction.

• Korean Journal of Food Science and Technology
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• v.53 no.1
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• pp.12-18
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• 2021

The in vitro antioxidant activity of oregano seed fractions, fractionizing with 80% ethanol, n-hexane, ethyl acetate, n-butanol, and water, was evaluated, and their effects on edible oils were determined in corn oil at 180℃. The ethyl acetate fraction had the highest radical-scavenging activity. The ferric reducing antioxidant power activity and total phenol content of the ethyl acetate fraction were determined as 6,130 µmol ascorbic acid equivalents/g extract and 770 µmol tannic acid equivalents/g extract, respectively, which were significantly higher than those of the other fractions (p<0.05). Primary and secondary oxidation products in corn oil added with the ethyl acetate fraction of oregano seed significantly decreased by 1.5 and 1.26 times, respectively, compared with those in the control groups. The major volatile ingredients in the ethyl acetate fraction of oregano seeds were determined to be carvacrol, thymoquinone, and 3-cyclopentylcyl-cyclopentan-1-one. Ethyl acetate is a suitable solvent for extracting antioxidant compounds from oregano seeds and can be used as a natural antioxidant.

• 월간산업보건
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• s.387
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• pp.21-25
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• 2020

소변에서 2-에톡시 아세트산(EAA)의 존재는 2-에톡시 에탄올이나 2-에톡시에틸 아세테이트의 노출이 있었다는 특정 지표가 된다. 2-에톡시 아세트산은 2-에톡시 에탄올 또는 2-에톡시에틸 아세테이트에 노출되지 않은 사람의 생물학적 시료에서는 존재하지 않는다. 생물학적 노출지표(Biologial Exposure Index, BEI)는 주중 마지막 교대가 끝날 때 채취한 소변의 2-에톡시 아세트산 측정으로 권고하고 있다. 측정치는 주중 누적 노출의 지표이다. 작업환경 노출의 주요 흡수 경로인 피부 흡수는 2-에톡시 아세트산의 소변 농도를 크게 증가시킨다.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2009.05a
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• pp.235-236
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• 2009

금속 아세테이프가 금속으로 열분해하는 반응을 이용하여 템플레이트 안에 잘 정렬된 금속 나노 구조물을 얻는 것은 센서 (sensor), 분리 막(separation), 저장 장치(storage), 에너지 전환 장치 (energy conversion)에 응용이 가능하다. 실버 아세테이트와 팔라듐 아세테이트에서 순수 실버와 팔라듐 나노 구조의 제조 및 형태의 차이를 밝히는 것을 목적으로 나노 입자의 크기와 활성화 에너지가 이에 영향을 주는 것으로 확인할 수 있었다. 금속 나노 구조의 확인 및 나노입자의 크기와 활성화 에너지를 분석 관찰하기 위해 DSC, TG, XRD, FE-SEM 등을 이용하였다.

• Dyeing and Finishing
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• v.3
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• pp.63-69
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• 2008

• Korean Journal of Food Science and Technology
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• v.50 no.2
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• pp.209-215
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• 2018

To evaluate the radical scavenging activity of phenolic-rich fractions of Gardenia jasminoides, we first measured the levels of total polyphenols in hexane, ethyl acetate, and butanol fractions from the extract of G. jasminoides. The ethyl acetate fraction of G. jasminoides extract (GJ-EA) showed high level of phenolics, potent reducing power, and 2,2-diphenyl-1-picrylhydrazyl/2,2'-azino-bis 3-ethylbenzothiazoline-6-sulfonic acid radical scavenging effect. In addition, GJ-EA inhibited the overproduction of nitric oxide in lipopolysaccharide-activated BV-2 microglia. Furthermore, we found that GJ-EA suppressed $H_2O_2$-induced PANC-1 pancreatic cancer cell proliferation in a concentration-dependent manner and also reduced their migratory ability. These results suggest that GJ-EA may be a good source for functional foods with antioxidant and chemo-preventive activities.