• Title/Summary/Keyword: Oil extract

검색결과 830건 처리시간 0.02초

대두유에 대한 율피의 용매분획별(Ether, Butanol, Water) 항산화효과 (The Antioxidant Activities of Three Solvent(Ether, Butanol, Water) Extrats from Chestnut Inner Shell in Soybean Oil)

  • 오승희;김용욱;김명애
    • 한국식생활문화학회지
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    • 제20권6호
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    • pp.703-708
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    • 2005
  • 대두유에 율피의 용매분획별(에테르, 부탄올, 물) 추출물과 tocopherol, BHA를 각각 0.02% 첨가한 후 자동산화 및 가열 산화시 항산화효과를 비교하였다. 1. 자동산화시 과산화물가를 통한 항산화력 비교에서 $45^{\circ}C$에서 42일간 저장한 경우 부탄올추출물 > 에테르추출물 > 무첨가구 > BHA > 토코페롤 순으로 항산화력이 있었고, $60^{\circ}C$에서 32일간 저장한 경우에도 부탄올 추출물이 강한 항산화력을 보였으며, 에테르추출물은 무첨가구와 큰 차이가 없었다. 2. 가열산화의 경우 에테르추출물이 우수한 항산화력을 나타내었다. 3. 추출물의 용매별 항산화성분의 분석결과 에테르추출물에는 ellagic acid, quercetin, morin, naringenin, flavanol로서 주요성분은 ellagic acid이었다. 이들 성분의 총량은 에테르추출물 49.09%(w/w), 부탄올추출물 76.26%(w/w)로서 부탄올 추출물에 폴리페놀성분이 다량 함유되어있어 우수한 항산화효과에 영향을 미친 것으로 판단된다. 부탄올추출물에는 ellagic acid, naringenin, gallic acid, flavanol이 있었으며, 주요성분은 naringenin, gallic acid로서 이들 성분들이 항산화 효과에 영향을 미친 것으로 사료된다.

Study of Antimicrobial Activity of New Zealand's Tea Tree Essential Oil, Grapefruit Seed Extract and its major Component.

  • Han, Chang-Giu;Lee, Young-Woon;Zhoh, Choon-Koo;Kim, Byung-Hoon
    • 대한화장품학회지
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    • 제25권4호
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    • pp.17-41
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    • 1999
  • Manuka oil sometime named New Zealand's tea tree oil is soluble in oil and come from nature. The $\alpha$-pinene extracted from Manuka oil and R-limonene which is one of the component of extracted Citrex from Grapefruit were used to estimate the antimicrobial activity and to improve the capability of antiseptic. Disk diffusion and broth dilution methods were used to measure the antimicrobial activity. Escherichia coli which is gram-negative bacteria and Staphylococcus aureus which is gram-positive bacteria were used as strain. The antimicrobial activity of Manuka oil and $\alpha$-pinene for Escherichia coli, Staphylococcus aureus is similar when the concentration of Manuka oil and $\alpha$-pinene is $10{\mu}l$. However, Antimicrobial activity of Manuka oil for Escherichia coli, Staphylococcus aureus is better than that of $\alpha$-pinene when the concentration of Manuka oil and $\alpha$-pinene is low. Antimicrobial activity of Citrex is superior to that of R-limonene. The proper ratio of Maunka oil and Citrex can improve the antimicrobial activity. The proper ratio obtained from studies was 75% of Maunka oil and 25% Citrex for Escherichia coli, 25% of Maunka oil and 75% Citrex for Staphylococcus aureus.

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밀도계를 이용한 비추출식 냉동기유농도 측정에 관한 연구 (An investigation on the in si·tu measurement of the oil-concentration with densimeter)

  • 김상현;김창년;박영무
    • 설비공학논문집
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    • 제11권1호
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    • pp.31-37
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    • 1999
  • In order to predict thermodynamic performance of refrigeration system, it is required to know the oil concentration of the refrigerant/oil mixture. The current method to measure the oil concentration is to extract the working mixture and then to measure the oil weight. However, it is Quite necessary to estimate oil concentration without any extraction of the working fluid. In this study a new method and working equation is presented as follows. It is based on the measurement of spedific gravity and temperature : $$C=a+b{\times}t+c{\times}t^2+(d+e{\times}t+f{\times}t^2){\times}SG$$ C is oil concentration, t is temperature($^{\circ}C$), SG is specific gravity of mixture and a~f is coefficients. The oil concentration ranges over 0~12 wt% and the temperature ranges over $20{\sim}50^{\circ}C$. The specific gravity and temperature are measured using the on-line densimeter and thermometer. This working equation enables to predict the oil concentration without any extraction of the mixture. This equation can be applied for R-12/Naphthenic oil and R-134a/POE oil oiquid mixtures.

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오일의 누출이 토양오염, 식생 및 지하수에 주는 영향에 관한 연구 (A Study on the Effect of. Oil Leakage for Soil Contamination, Plants and Groundwater)

  • 진성기;도덕현;최규홍
    • 한국농공학회지
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    • 제36권1호
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    • pp.141-152
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    • 1994
  • Our experiment investigated the degree of soil contaimination caused by oil leakage. Each soil sample was taken by boring 5, 8m below the test areas, located 5 to 30m from storage tanks at oil stations. According to the results from a series of laboratory tests(both soxhiet extract test and gas chromatograph test), Traces of a light oil were found in all samples except in Dj8, rocky soil and gasoline and petroleum were not detected. We concluded that soil contamination was caused by the corrosion of storage tanks or alternatively by oil overflow caused during the flooding of underground water seeping into the tank during heavy rain fall or the spillage caused by carelessness during lubrication. Old stations without a concrete box enclosing their metal tanks run a greater risk of oil leakage. To research the effect of oil leakage on plant growth and underground water, We examined the results of research conducted overseas. According to these results, when oil leakage occurs, plant growth is repressed and agricultural crops experience low productivity levels. Also, the contamination of underground water can be serious when oil spreads to the aquifer layer. As a result of these problems, to prevent oil leakage and minimize its contaminating effects at oil stations, it is necessary to improve facilities of storage tanks and have the monitoring system of oil leakage.

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Study of Antimicrobial Activity of New Zealand’s Tea Tree Essential Oil , Grapefruit Seed Extract and its major Component.

  • Han, Chang-Giu;Lee, Young-Woon;Zhoh, Choon-Koo;Kim, Byung-Hoon
    • 대한화장품학회:학술대회논문집
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    • 대한화장품학회 1999년도 IFSCC . ASCS 학술대회 발표 논문
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    • pp.17-41
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    • 1999
  • Manuka oil sometime named New Zealand's tea tree oil is soluble in oil and come from nature. The $\alpha$-pinene extracted from Manuka oil and R-limonene which is one of the component of extracted Citrex from Grapefruit were used to estimate the antimicrobial activity and to improve the capability of antiseptic. Disk diffusion and broth dilution methods were used to measure the antimicrobial activity Escherichia coli which is gram-negative bacteria and Staphylococcus aureus which is gram-positive bacteria were used as strain. The antimicrobial activity of Manuka oil and $\alpha$-pinene for Escherichia coli, Staphylococcus aureus is similar when the concentration of Manuka oil and $\alpha$-pinene is 10${mu}ell$. However, Antimicrobial activity of Manuka oil for EscherEchta coli, Staphylococcus aureus is better than that of $\alpha$-pinene when the concentration of Manuka oil and $\alpha$-pinene is low. Antimicrobial activity of Citrex is superior to that of R-limonene. The proper ratio of Maunka oil and Citrex can Improve the antimicrobial activity. The proper ratio obtained from studies was 75% of Maunka oil and 25% Citrex for Escherichia coli, 25% of Maunka oil and 75% Citrex for Staphylococcus aureus.

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Mesophase formation behavior in petroleum residues

  • Kumar, Subhash;Srivastava, Manoj
    • Carbon letters
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    • 제16권3호
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    • pp.171-182
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    • 2015
  • Mesophase pitch is an important starting material for making a wide spectrum of industrial and advanced carbon products. It is produced by pyrolysis of petroleum residues. In this work, mesophase formation behavior in petroleum residues was studied to prepare environmentally-benign mesophase pitches, and the composition of petroleum residues and its influence on the mesophase formation was investigated. Two petroleum residues, i.e., clarified oil s (CLO-1, CLO-2) obtained from fluid catalytic cracking units of different Indian petroleum refineries, were taken as feed stocks. A third petroleum residue, aromatic extract (AE), was produced by extraction of one of the CLO-1 by using N-methyl pyrrolidone solvent. These petroleum residues were thermally treated at 380℃ to examine their mesophase formation behavior. Mesophase pitches produced as a result of thermal treatment were characterized physico-chemically, as well as by instrumental techniques such as Fourier-transform infrared spectroscopy, nuclear magnetic resonance, X-ray diffraction and thermogravimetry/derivative thermogravimetry. Thermal treatment of these petroleum residues led to formation of a liquid-crystalline phase (mesophase). The mesophase formation behavior in the petroleum residues was analyzed by optical microscopy. Mesophase pitch prepared from CLO-2 exhibited the highest mesophase content (53 vol%) as compared to other mesophase pitches prepared from CLO-1 and AE.

참치유의 산화 안전성에 미치는 일부 합성 및 천연 항산화제의 효과 (Effect of Some Synthetic and Natural Antioxidants on the Oxidative Stability of Skip Jack Oil)

  • 손종연;임재호;손흥수
    • 한국식품영양학회지
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    • 제8권2호
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    • pp.88-92
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    • 1995
  • The antioxidant activity of synthetic antioxidants, BHA, BHT and TBHQ and natural antioxidants, rosemary extract, sesamol, caffeic acid and pyrogallol In a skip jack oil were studied. A control and substrates containing synthetic(0.02%) and natural antioxidant (0.05%) were stored in an incubator kept at 37$^{\circ}C$ for 8 days. The antioxidant activity of synthetic and natural antioxidants was investigated by comparing peroxide values. The results of this study were as follows All the synthetic antioxidants used for this study exhibited antioxidant activity in skip jack oils. The antioxidant activity of TBHQ was greater than that of BHA and BHT. The rosemary extract did not show antioxidant activity in skip jack oils. The antioxidant activity of sesamol and caffeic acid were greater than those of BHA. Especially Pyrogallol exhibited very strong antioxidant activity, comparable to that of the TBHQ. The antioxidant activity of the sesamol, caffein acid and pyrogallol used skip lack oil, In decreasing order as follows : pyrogallol>caffeic acid> sesamol.

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옥수수유의 산화안정성에 대한 미강 추출물의 효과 (Effects of Rice Bran Extracts on Oxidative Stability of Corn Oil)

  • 연제영;이선미;양진우;곽지은;김영화;정헌상;이준수
    • 한국식품영양과학회지
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    • 제45권10호
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    • pp.1513-1517
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    • 2016
  • 옥수수유의 산화안정성을 알아보고자 미강 추출물을 옥수수유에 첨가하여 저장기간에 따른 과산화물가, 공액이중산가 그리고 비타민 E 함량 변화를 조사하였다. 미강 추출물은 추출방법에 따라 USM(unsaponifiable matter of the rice bran), MEO(methanolic extract of the rice bran oil) 및 MEDR(methanolic extract of the defatted rice bran)로 분류한 3가지 추출물을 제조하였다. 과산화물의 경우 미강 추출물 중 MEDR은 저장 9일까지 BHT의 수준과 유사한 경향을 보였으며 다른 추출물보다 과산화물 생성속도가 느리게 진행되어 산화안정성이 증가하였다. 공액이중산가의 경우 MEDR은 저장 12일까지는 BHT와 비슷한 수준을 보이다가 저장 15일부터 급격히 높아짐을 알 수 있었다. 비타민 E의 경우 ${\alpha}$-토코페롤(T)과 ${\alpha}$-토코트리에놀(T3) 함량 변화는 저장 초기와 비교하여 USM은 약 85%, MEO는 약 67%, MEDR은 약 59%가 감소했지만, ${\gamma}$-T와 ${\gamma}$-T3의 함량 변화는 저장 초기와 비교하여 USM은 약 25%, MEO은 약 29%, MEDR은 약 15%로 ${\alpha}$-T와 ${\alpha}$-T3보다 감소율이 현저히 낮았다. 결과적으로 미강 추출물은 MEDR> MEO> USM 순으로 산화안정성이 증가하였으며 다산과 일품 품종 간에 유의적인 차이는 나타내지 않았다. 따라서 미강 추출물 중 MEDR은 천연 항산화제로 그 이용 가치가 있다고 판단한다.

샐러리 종자 에탄올 추출물의 산화방지 활성 및 수중유적형 유화계에서의 산화안정성 (Antioxidant properties and oxidative stability of celery seeds ethanol extract using in vitro assays and oil-in-water emulsion)

  • 김민아;한창희;이재철;김미자
    • 한국식품과학회지
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    • 제49권5호
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    • pp.480-485
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    • 2017
  • 본 연구는 생리활성이 우수하다고 알려진 향신료 중 샐러리 종자 80% 에탄올 추출물의 항산화능과 산화안정성을 관찰하였다. 샐러리 종자 80% 에탄올 추출물의 처리에 의해 DPPH 라디칼 소거능은 농도 의존적으로 유의적으로 증가하는 것으로 나타났다. 또한 ABTS 양이온 라디칼 소거활성 역시 농도 의존적으로 라디칼 소거활성이 유의적으로 증가하는 것으로 나타났다. 총 페놀 함량은 $8.2{\pm}2.3mol$ 타닌산 당량/g extract로 나타났고, FRAP 환원력은 $195.0{\pm}12.6mol$ 아스코브산 당량/g extract로 나타났다. 수중유적형 유화계에서의 헤드드스페이스 산소 함량은 대조군의 산소 잔존율 보다 샐러리 종자 80% 에탄올 추출물 처리군 산소 잔존율이 유의적으로 높았고, CDA가는 광산화가 진행됨에 따라 대조군에 비해 지방산화시 발생되는 conjugated dienes의 생성량이 유의적으로 감소하였으며, 지방질 하이드로과산화물의 양 역시 샐러리 종자 80% 에탄올 추출물 처리군이 대조군 보다 유의적으로 감소하는 것으로 나타났다. 이러한 샐러리 종자의 항산화 및 수중유적형에서의 산화안정성은 샐러리 종자 80% 에탄올 추출물에 존재하는 향기성분들에 의해 유래된 것으로 사료된다. 이와 같은 결과로 샐러리 종자 에탄올 추출물은 항산화능이 우수하여 산화안정성이 중시되는 식품에 천연항산화제로서 사용할 수 있을 것으로 사료된다.

An investigation on the in si.tu measurement of the oil-concentration

  • Kim, Chang-Nyeun;Park, Young-Moo
    • International Journal of Air-Conditioning and Refrigeration
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    • 제9권1호
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    • pp.20-28
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    • 2001
  • In order to predict thermodynamic performance of refrigeration system, it is required to know the oil concentration of the refrigerant/oil mixture. The current method is to extract the working mixture and then to measure the oil weight. In this study, oil concentration is measured in si.tu way without any extraction of the working fluid. Based on the measurement, a working equation is presented as follows, C=a +b x t +c x $t^2$ +(d + e x t +f x $t^2$) x SG. C is oil concentration, t is temperature($^{\circ}C). SG Is specific gravity of mixture and a~f is coefficients The oil concentration ranges over 0~l2 wt% and the temperature ranges over 20~50$^{\circ}C. The specific gravity and temperature are measured using the on-line densimeter and thermometer. This working equation enables to predict the oil concentration without any extraction of the mixture. This equation can be applied for R-12/Naphthenic oil and R-134a/P0E oil liquid mixtures.

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