• Title/Summary/Keyword: Acetaldehyde

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Characteristics of VOCs Oxidation using Copper Phthalocyanine Catalysts (구리 프탈로시아닌 촉매의 VOCs 산화 특성)

  • 서성규;윤형선
    • Journal of Korean Society for Atmospheric Environment
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    • v.20 no.4
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    • pp.515-521
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    • 2004
  • The catalytic oxidation of volatile organic compounds (methanol. acetaldehyde) has been characterized using the copper phthalocyanine catalyst in a fixed bed flow reactor under atmospheric pressure. The catalytic activity for pretreatment conditions was examined by this reaction system. The catalytic activity was ordered as follows: metal free-PC<Cu ($\alpha$)-PC<Cu ($\beta$)-PC The formaldehyde, carbon monoxide as a partial oxidation product of methanol and acetaldehyde over Cu ($\alpha$)-PC catalyst were detected and the conversions of methanol and acetaldehyde were accomplished above 95% over Cu ($\alpha$) -PC, Cu ($\beta$) - PC catalyst at 35$0^{\circ}C$. The pretreated metal free -PC, Cu($\alpha$)-PC, Cu($\beta$)-PC catalysts have been characterised by TGA, EA and XRD analysis. The catalytic activity pretreated with air and $CH_3$OH mixture (P-4) or air only (P-5) was very excellent. XRD and EA results showed that Cu($\alpha$)-PC, Cu($\beta$)-PC were destroyed an(1 new metal oxide such as CuO were formed.

Determination of Trace Aldehydes in Ambient Air by Liquid Chromatography (액체 크로마토그래프법에 의한 대기시료중 미량 알데히드류의 정량)

  • 이용근;정태우
    • Journal of Korean Society for Atmospheric Environment
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    • v.11 no.4
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    • pp.339-349
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    • 1995
  • The purpose on this study is to optimize the chromatographic determination method of trace aldehydes in ambient air. Carbonyl compounds in urban air were trapped at $C_{18}$ DNPH-coated cartridges, and generated hydrazone derivatives were separated by HPLC and detected by UV-vis spectroscopic detector at 360nm. Formaldehyde and acetaldehyde compounds could be isolated from urban(Seoul) air with more than 95% collection efficiency. The analytical detection limits for formaldehyde and acetaldehyde are 0.06pp $b_{v}$, 0.08pp $b_{v}$ for 108 L air samples, respectively. The precision of this method are 3 .sim. 4%(RSD) for mutiple injection of hydrazone standards. Separation of seven dinitrophenylhydrazones could be achieved in appoximately 20 minutes operation time using $C_{18}$ column with apprepriate eluent. The method was applied to the analysis of aldehydes and ketone in Seoul ambient air. The 24-h ambient levels of formaldehyde, acetaldehyde reached up to 6 .sim. 14 and 3 .sim. 8ppbv, respectively. The daily average concentration ratio were 0.60 for acetaldehyde/formaldehyde.yde.

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Effect of Artemisiae Argi Folium Fermented with Lactobacillus Pentosus on Hydrogen Peroxide Production of Human Hepatocyte Treated with Toxicants (Gallic acid 등으로 유발된 인간 간 조직세포 내 hydrogen peroxide 생성억제에 대한 유산균발효애엽 추출물의 영향)

  • Park, Wan-Su;Kim, Do-Hoon
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.23 no.6
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    • pp.1379-1384
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    • 2009
  • The purpose of this study is to investigate the effect of water extract from Artemisiae Argi Folium Fermented with Lactobacillus pentosus (AFL) on hydrogen peroxide production within human hepatocyte HepG2 cells treated with gallic acid, EtOH, nicotine, acetaminophen, and acetaldehyde. AFL (0~400 ug/mL) was treated with gallic acid, EtOH, nicotine, acetaminophen, and acetaldehyde. And the intracellular productions of hydrogen peroxide were measured by dihydrorhodamine 123 (DHR) assay. AFL showed the restoration of the intracellular productions of hydrogen peroxide which were reduced by gallic acid, EtOH, nicotine, acetaminophen, and acetaldehyde in HepG2 Cells. AFL could be supposed to have the hepatoprotective effect related with hepatocytologic signaling activity against gallic acid, EtOH, nicotine, acetaminophen, and acetaldehyde.

Isolation of Ethanol-, Acetic acid- and Acetaldehyde- assimilating yeast, Candida sp. JY-5 (Ethanol, Acetic acid 및 Acetaldehyde의 동화능력을 가진 Candida sp. JY-5의 분리)

  • Jun, Hong-Ki;Yeehn Yeeh
    • Microbiology and Biotechnology Letters
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    • v.13 no.3
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    • pp.233-237
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    • 1985
  • An yeast assimilating ethanol, acetic acid and acetaldehyde among $C_2$-compounds was isolated. The morphological, cultural, physiological and biochemical properties of the isolate were examined. As the results of taxonomical researches, the isolate was identified as the genus Candida.

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Effect of Panax Ginseng in Mouse Liver with Ethnol-Induced Monoamine Oxidase Activity (Ethanol이 유도한 간장중 MAO 활성변동에 미치는 인삼의 영향)

  • Huh, Keun;Lee, Sang-Il;Song, Min-Ik;Shin, Uk-Seob;Park, Jong-Min
    • The Korean Journal of Pharmacology
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    • v.25 no.1
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    • pp.87-91
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    • 1989
  • Effect of ginseng butanol fractions on the hepatic mitochondrial monoamine oxidase activity with ethanol treatment was investigated in this experiment. Ethanol treatment, either acutely or chronically, increased the hepatic mitochondrial monoamine oxidase activity compared to control group. Whereas, treatment with ginseng butanol fractions lowered the ethaol-induced monoamine oxidase activity. Acetaldehyde, the major metabolite of ethanol, significantly increased the hepatic mitochondrial monoamine oxidase activity more than ethanol did. It was also observed that ginseng butanol fractions reduced the increase of the hepatic mitochondial monoamine oxidase activity by acetaldehyde. From these results, it is suggested that ginseng butanol fractions may be associated with the modulation of the hepatic mitochondrial monoamine oxidase activity in ethanol-treated animals.

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Risk Assessment of Aldehydes in Some Residential Indoor Air Included Atopy Patient's Homes (실내 공기 중 일부 알데하이드류에 대한 위해도 평가 - 일부 주택 및 아토피 환자 주택을 대상으로)

  • Moon Kyong Whan;Byeon Sang Hoon;Choi Dal Woong;Lee Eun Il;Oh Eun Ha;Kim Young Whan
    • Journal of Environmental Health Sciences
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    • v.32 no.1 s.88
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    • pp.19-26
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    • 2006
  • This study was undertaken to determine the concentrations of 15 aldehydes in air samples collected from 21 households including 9 atopy patient's homes and to assess the extent of exposure and risk for an individual due to inhalation. Of all the aldehydes identified in both indoor and outdoor environment, formaldehyde and acetaldehyde were the most abundant aldehydes, which were occupied $60\%\;and\;17\%$ of total amount, respectively. The geometric mean concentration of formaldehyde and acetaldehyde in indoor air were $170.5\pm1.9\;{\mu}g/m^3\;and\;47.3\pm1.5\;{\mu}g/m^3$, respectively. There existed a strong correlation between formaldehyde, acetaldehyde and other aldehydes. And the ratio of indoor and outdoor concentrations (I/O) exceeded 1.0 for almost every measured aldehydes except m-tolualdehyde... No associations were found between the level of aldehydes and either housing characteristics or living habits in most of the samples with only a few exception. And the concentrations of all aldehydes indoor air between atopy patient's homes and control homes were not significant(p>0.05). Formaldehyde and acetaldehyde exposures and risks were estimated by using the inhalation unit risk, mean concentrations and the 95th percentiles, and which were $2.6\times10^{-3}\;and\;1.1\times10^{-4}$, respectively. The mean and the 95th percentile risk estimates were 25 times higher for formaldehyde than for acetaldehyde in homes.

Volatile Aroma Compounds of Yogurt from Milk and Cereals (우유와 곡류를 이용한 요구르트의 휘발성 향기성분)

  • Kim, Kyung-Hee;Ko, Young-Tae
    • Korean Journal of Food Science and Technology
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    • v.25 no.2
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    • pp.136-141
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    • 1993
  • A curd yogurt was prepared from milk added with skim milk powder or four kinds of cereal. The effect of cereals at 2%(w/v) level on the pattern of volatile aroma compounds in curd yogurt was investigated. Acetaldehyde, acetone, ethanol, diacetyl, butanol and acetoin in curd yogurt were detected by gas chromatographic analysis. Among these compounds, acetaldehyde, ethanol, diacetyl and acetoin were produced during fermentation by Lactobacillus acidophilus (KCTC 2182). The addition of cereals did not affect markedly general pattern of volatile aroma compounds in curd yogurt. The amount of acetoin and ethanol markedly increased until the first 6 hours of fermentation, and then increased mildly until 24 hours. The amount of diacetyl markedly increased until the first 6 hours and then decreased slightly. Acetaldehyde was first detected by gas chromatograph after 18 hours of fermentation.

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Activity of Alcohol Dehydrogenase and Ethanol, Acetaldehyde Levels in Normal Adults Blood (정상인의 혈중 알코올 탈수소효소 활성도 및 에탄올, 아세트알데히드 농도에 관한 연구)

  • Kim, Ki-Woong;Yang, Jeong Sun;Lee, Jong-Seong;Cho, Young-Sook;Kang, Seong-Kyu;Chung, Ho Keun
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.4 no.2
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    • pp.240-247
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    • 1994
  • To identify normal levels of ethanol, acetaldehyde and alcohol dehydrogenase(ADH) activity in blood of Koreans, ethanol and acetaldehyde levels, activity of ADH in blood of Koreans, ethanol and acetaldehyde levels, activity of ADH in blood were measured in 97 subjects(male : 36, female : 61), 45 subjects(male : 21, female : 24) were not exposed to organic solvents and any other chemicals. Fifty two subjects(male : 15, female : 37) were exposed to organic solvents including toluene and xylene. The results were summerized as follows : 1. The blood ADH was not detected in exposed and non-exposed group. 2. The average blood ethanol level of non-exposed group was 0.0490 mg/dl, and exposed group was 0.0363 mg/dl. They were statistically significant(p<0.05). 3. The blood acetaldehyde levels in exposed group were significantly higher than that of non-exposed group was not statistically significant (p>0.05). 4. The average blood ethanol level of males in both groups was significantly higher than that of females, however, they were not statistically significant (p>0.05).

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Residential Exposure and Risk Levels to Ambient Formaldehyde and Acetaldehyde According to Distance from Industrial Area in Metropolitan City

  • Jo, Wan-Kuen;Lee, Jin-Woo
    • Journal of Environmental Science International
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    • v.19 no.6
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    • pp.671-680
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    • 2010
  • The present study evaluated residential exposure to atmospheric formaldehyde and acetaldehyde according to distance from the a dyeing industry complex (DIC). This purpose was achieved by measuring concurrently the outdoor air concentrations in residences near the DIC and a certain distance away, plus the outdoor air concentrations at two industrial areas within the DIC boundary. Formaldehyde concentrations (median values of 24.3 and $22.5{mu}g/m^3$ in IS1 and IS2, respectively) were higher than acetaldehyde concentrations (median values of 7.4 and $7.3{mu}g/m^3$ in IS1 and IS2, respectively) at both sites. However, there was no significant difference in the industrial outdoor air concentrations of both formaldehyde and acetaldehyde between the two sites. In addition, the median formaldehyde concentration from the residential site near the DIC (RS1) was about 1.5 times higher than that from the residential site far away from the DIC(RS2), and the median acetaldehyde concentration from RS1 was about 1.3 times higher than that from RS2. It is noteworthy that the mean or median risk as well as these maximum risks are well above the USEPA's permissible risk level of $10^{-6}$ from environmental exposure. This suggests that appropriate management for formaldehyde and acetaldehyde is necessary in order to decrease risk of the residents of study areas, regardless of the distance from the DIC.

The effect of herbal mixture on alcohol metabolism in Sprague Dawley rats (알코올을 투여한 흰쥐의 알코올 대사에 미치는 한약재 혼합추출물의 영향)

  • Jeong, Mijin;Kim, Soyoung;Do, Eunju;Yun, Jongkuk;Kim, Daeik;Han, Kyungsoo;Kim, Mi Ryeo
    • The Korea Journal of Herbology
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    • v.34 no.1
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    • pp.67-74
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    • 2019
  • Objectives : Alcohol hangover is a common phenomenon which basically occurs after heavy drinking. Moreover, heavy alcohol consumption leads to acute and chronic diseases. We investigated the effect of herbal mixture (SJ) on alcohol metabolism in serum or/and liver. Methods : 5W-old Sprague Dawley rats were used for the study. To overnight fasted rats, 0.9% saline or SJ extract was administrated per os before alcohol treatment. Then, 40% alcohol was orally administrated to all rats in 30 mins. Ethanol, acetaldehyde concentrations, alcohol dehydrogenase (ADH), acetaldehyde dehydrogenase (ALDH) activities were measured by assay kits. Aspartate aminotransferase (AST) and alanine transaminase (ALT) were measured by analyzer. Results : Ethanol and acetaldehyde concentrations lowered in SJ groups compared with CON group. Especially, acetaldehyde concentration significantly decreased in SJ groups compared with CON group. AST and ALT levels tended to increase in SJ groups compared with CON group but there was no significant difference between CON group and SJ groups. ADH activity in serum was higher in SJ groups than CON group but no significant difference in liver. ALDH activity in both serum and liver showed significantly increased in SJ groups compared with CON group. Conclusions : Treatment of SJ extract showed not only reducing concentration of alcohol and acetaldehyde but also increasing activities of ADH and ALDH. These results suggest SJ may influence in alcohol metabolism via control of metabolic enzyme activities and metabolite. Therefore, SJ, herbal mixture, might have a function of preventing hangover after drinking alcohol.