• Title/Summary/Keyword: 휘발성 화합물

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Caracteristic of Ru thin films using ECR Plasma (ECR 플라즈마를 이용한 Ru 박막의 식각특성)

  • 함동은;이순우;안진호
    • Proceedings of the International Microelectronics And Packaging Society Conference
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    • 2002.11a
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    • pp.123-127
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    • 2002
  • DRAM용 capacitor의 차세대 전극물질 후보 중의 하나인 Ru 박막을 고밀도의 ECR 플라즈마를 이용하여 식각 특성 및 식각 메커니즘을 알아보고자 하였다. 식각시 Ru은 oxygen들과 결합을 하여 RuO2 화합물들을 생성하고 RuO2 화합물들은 다시 oxygen들과 결합을 함으로써 휘발성이 강한 RuOx 화합물들을 생성하였다. 하지만 이러한 식각이 이루어지기 위해서는 oxygen이온들에 의한 충돌이 필요하며, Cl과 F 가스들을 첨가가 의해 충돌 이온의 에너지가 증가되어 RuO2와 O radical들의 반응성을 향상시켰다. 이에 휘발성이 좋은 RuO4들의 형성속도를 증가시킴으로써 식각 속도를 향상시킬 수 있었다.

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Volatile Compounds Formed by Thermal Degradation of Ascidian Tunic Carotenoids (우렁쉥이 껍질 카로테노이드의 가열분해로 생성되는 휘발성 화합물의 특성)

  • Ho, Chi-Tang;Choi, Byeong-Dae
    • Applied Biological Chemistry
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    • v.40 no.6
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    • pp.519-524
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    • 1997
  • As an investigation for utilization of ascidian tunic carotenoids as a food color additives, we attempted to collect the volatile thermal degradation compounds from ascidian tunic carotenoids. Oxygenate volatile compounds were extracted by simultaneous distillation and extraction/concentration apparatus and analyzed by gas chromatography and mass spectrometery. Total 63 compounds were identified and some of them were caused by thermal degradation. They included 1,3,5-trimethylbenzene, 3,5,5-trimethyl-3-cyclohexen-1-ol, 3,5,5-trimethyl-3-cyclohexen-1-one, 1,1,2,3-tetramethyl-2-cyclohexen-5-ol, 1,1,2,3-tetramethyl-2-cyclohexen-5-one, 2,3,4,4-tetramethyl-6-hydroxy-2-cyclohexene-1-one, 1,2,3,8-tetrahydro-3,3,6-trimethyl-1-naphtol, dihydroacetinidolide, ${\beta}-ionone$, 2-(1,1,5-trimethyl-3-hydroxy-5-cyclohexen-6-yl)-1-tolylethene, 2,6-dimethyl-8-(1,1,5-trimethyl-3-hydroxy-5-cyclohexen-6-yl)-1,3,5-octatriene-7-yne. Proposed mechanism of formation of some compounds as thermal degradation products of ascidian tunic carotenoids are provided.

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Effect of Electron Beam Irradiation on Volatile Organic Compounds of Vitis labrusca L. (전자선 조사한 캠벨얼리 포도(Vitis labrusca L.)의 휘발성 유기성분 변화)

  • Shim, Sung-Lye;No, Ki-Mi;Kim, Kyong-Su;Song, Gi-Dong
    • Food Science and Preservation
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    • v.17 no.1
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    • pp.151-159
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    • 2010
  • Changes in volatile organic compounds were investigated during storage after electron beam irradiation. Grapes were irradiated at 0.25, 0.5, 0.75, and 1.0 kGy and stored for 1 month at $4^{\circ}C$. Butanol, hexanal, [E]-2-hexenal, hexanol, and 3-methyl-butanol were the major volatile organic compounds of grapes. The types of volatiles in irradiated grapes were similar to those of non-irradiated samples but concentration differed among treatments. Some volatile compounds decreased during storage, whereas others, especially the esters, increased. Concentration of most volatile compounds were higher in pre-stored grapes than in post-stored fruit (thus, during the 30 days after irradiation by e-beam). Consequently, concentration of volatile organic compounds either increased or decreased after e-beam irradiation but these changes did not correlate with irradiation dose.

Changes of Volatile Component Contents in a Red Ginseng Tail Root by Puffing (팽화처리에 의한 홍미삼의 휘발성 성분의 변화)

  • Han, Chan-Kyu;Choi, Sang-Yoon;Kim, Sung-Soo;Sim, Gun-Sub;Shin, Dong-Bin
    • Journal of Ginseng Research
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    • v.32 no.4
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    • pp.311-314
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    • 2008
  • This study evaluated changes in concentrations of volatile compounds contained in red ginseng tail roots through puffing treatment. The results showed that 59 out of 63 volatile compounds were detected from the puffing treated roots. While most terpene and furan compounds seem to be increased by puffing treatment, most alcoholic, aldehyde and acid compounds seem to be decreased, and terpene compounds content accounted for 70% of the 63 volatile components in the puffed red ginseng tail roots.

Formation of Volatile Compounds from Maillard Reaction of D-Glucose with DL-Alanine in Propylene Glycol Solution (Propylene Glycol 용매계에서 DL-Alanine과 D-Glucose의 마이야르 반응에 의한 휘발성 화합물의 생성)

  • Kim, Young-Hoi;Kim, Ok-Chan;Lee, Jung-Il;Yang, Kwang-Ku
    • Korean Journal of Food Science and Technology
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    • v.20 no.2
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    • pp.157-163
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    • 1988
  • The volatile compounds produced from the browning reaction of 0.5M DL-alanine and 0.5M D-glucose mixture using propylene glycol as a reaction medium were analysed by gas chromatography and gas chromatography-mass spectrometry and effects of temperature($100^{\circ}C,\;120^{\circ}C,\;140^{\circ}C$) and time(20min, 2hours) on the formation of volatile compounds were investigated. Browning reaction were rapidly increased as the reaction temperature and time increased. From methylene chloride extracts, twenty six compounds, including 7 alkyl pyrazines. 4 pyrroles, 3 furans, 1 furanone and 11 miscellaneous compounds were identified. The relative amounts of pyrazines, pyrroles and furans were markedly increased as reaction temperature and time increased. The results showed that caramel-like and burnt sugar-like aroma produced by alanine -glucose reaction must be mainly comprised of nitrogeneous heterocyclic such as pyrazines, pyrroles and oxygen heterocyclic compounds such as 2-hydroxy-3-methyl-2-cyclopenten-1-one and 2,5-dimethyl-4-hydroxy-3(2H)-furanone.

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A development of continuous and on-site measurement of VOCs in ambient air using a novel thermal desorption technique. (열탈착 방법을 이용한 휘발성유기화합물 자동 연속 분석 장치의 개발)

  • 송희남;김종환;김조천;한진석;신진호;이강웅
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2001.11a
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    • pp.367-368
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    • 2001
  • 휘발성 유기화합물질들(VOCs)은 그 자체가 인체에 유해한 화합물로 작용할 뿐만 아니라 환경대기 중에서 질소화합물(NOx)과 광화학 반응을 통하여 오존 등 유해한 산화물을 형성하는 전구물질로 작용하여 이들의 거동을 이해하고 분석하는 것이 대기환경에 매우 중요한 것으로 인식되고 있다. 더욱이 오존 예보 및 경계 체제의 중요한 입력 요인으로 인식되어 신뢰성 있는 배출 정보의 산출을 위해 VOCs 농도를 현장 실측하여 분석하고 예보에 이용하려는 시도가 이루어지고 있다. (중략)

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Development of wire mesh honeycomb using electrophoretic deposition for catalytic oxidation of VOCs (Eletrophoretic Deposition(EPD)법을 이용한 휘발성 유기화합물 촉매산화용 저압차 반응기 개발)

  • 양경식;최진성;정종식
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2001.11a
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    • pp.391-392
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    • 2001
  • 휘발성 유기화합물(Volatile Organic Compound : 이하 VOCs 라 칭함)은 탄화수소화합물의 총칭으로 오존 등 광화학적 스모그의 원인이 되는 물질일 뿐만 아니라 발암성 등의 유해 물질, 지구온난화와 성층권의 오존층 파괴의 원인 물질, 대기 중 악취물질로서[1] 환경 및 인간의 건강에 영향을 초래하여 VOCs 감축을 주요 대기오염정책으로 세우는 국가가 증가하는 추세이다. (중략)

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A study on the applicability of absorbent sampling method for the volatile organic compounds in ambient air (대기중 휘발성 유기화합물 채취를 위한 흡착법의 적용에 대한 연구)

  • 김영두;김광래;이상칠;어수미;김민영;봉춘근;김동술
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2002.11a
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    • pp.282-283
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    • 2002
  • 대기 중에 존재하는 오염물질을 효과적으로 관리 및 규제하기 위해서는 해당 오염물질의 농도를 정확하게 파악하는 것이 기본적인 단계이며 반드시 정확성과 정밀성을 확보해야 한다. 농도의 정확성은 크게 분석 방법과 시료를 채취하는 과정 및 채칠 후 보관상태에 따라 달라질 수 있다. 대기 중 휘발성 유기화합물(VOCs)의 경우 존재하는 농도가 매우 낮아 채취 시 많은 주의를 요구할 뿐만 아니라 이들은 화학적으로 불안정하여 보관 시에도 많은 주의를 기울여야 한다. (중략)

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Studies on the volatile components of Inulae flos(Inula britannica var. chinensis REGEL) (선복화(旋覆花)의 휘발성(揮發性) 성분(成分)에 관(關)한 연구(硏究))

  • Sun-Woo, Sun;Kim, Hyung-Sub;Byun, Keun-Soo
    • Applied Biological Chemistry
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    • v.34 no.4
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    • pp.312-317
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    • 1991
  • The volatile components of Korean and Chinese Inulae flos were identified. It is made of dried Inulae flos from the components were collected by simultaneous steam distillation extract method. Those were analyzed by combined gas chromatography(GC) and gas chromatography-mass spectrometrt(GC/MS). Sixty two components, including 10 hydrocarbons, 7 aldehydes, 18 alcohols, 3 ketones, 5 esters, 13 acids and 6 miscellaneous components were identified. Volatile components in Inulae flos were fractinated into one hydrocarbon fraction and two oxygenated hydrocarbon fractions by using silica gel column chromatography. The volatile components consisted of 16.85% hydrocarbon and 83.15% oxygenated hydrocarbons in Korean Inulae flos, 23.46% hydrocarbon and 76.53% oxygenated hydrocarbons in Chinese Inulae flos.

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Volatile Sulfur Components from Fresh Radishes of Korean Origin (한국산 무우의 휘발성 함유황화합물에 관하여)

  • Kim, Mee-Ree;Rhee, Hei-Soo
    • Korean journal of food and cookery science
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    • v.1 no.1
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    • pp.33-39
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    • 1985
  • The volatile sulfur components from two varieties of radishes ('Taeback' and 'Altali'), obtained by steam distillation and solvent ($CCl_4$) extraction, were isolated and charac-terized by GC/MS analysis. The GC profile of the volatile sulfur com-pounds in the steam distillates from two types of radishes was quite similar. 4-Me-thylpentyl, 3-methylthiopropyl, 4-methylthio-3-butenyl, 4-methylthiobutyl and 5-methyl-thiopentyl isothiocyanates, 5-methylthio-4-pentenenitrile, 1-methylthio-3-pentanone, and dimethyl sulfides were commonly identified. In the $CCl_4$ extract, 4-methylsulfinyl-3-bu-tenyl isothiocyanate was obtained as another major constituent. Whereas 4-methylthiobutyl isothiocyanate was found to be a predominent component in the steam distillate, 4-methylthio-3-butenyl isothiocyananate was a major one in the $C1_4$ extract.

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