• 한국균학회지
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• 제19권4호
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• pp.292-298
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• 1991

Simultaneous distillation-extration method에 의해 국내에서 인공재배되고 있는 여름 느타리 버섯(Pleurotus sajor-caju)을 실온과 냉장하에서 저장하면서 휘발성 향기성분을 분리한 다음 GC-MS 및 GC에 의한 표준품과의 머무름시간 비교에 의해 향기성분의 변화를 검토하여 보았다. 총 aroma contentrates의 함량은 냉장 저장시는 큰차이를 보이지 않았으나 실온 저장시는 큰 감소의 경향을 보였다. 확인된 38종의 휘발성 화합물중 실온 저장시 ${\delta}-decalactone$만 약간증가하였으나 기타의 성분들은 현저히 감소한 반면 냉장 저장시는 2-methyl butanal, 1-octen-3-ol, cis,cis-1,5-octadien-3-ol, pentadecanoic acid등은 감소추세를 보였지만 3-octanone, 1-octen-3-one, 3-octanol, 5-undecanol등은 오히려 증가되는 경향을 보였다. 또한 중량 감소와 관능적 특성은 실온 저장시 냉장 저장보다 심한 변화를 보였다.

• 한국균학회지
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• 제19권4호
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• pp.299-305
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• 1991

Simultaneous distillation-extration method에 의해 4종의 국내에서 인공재배되고 있는 느타리 버섯류 (Pleurotus sp)로부터 휘발성 향기성분을 분리한 다음 GC-MS 및 GC에 의한 표준품과의 머무름 시간 비교에 의해 성분을 확인 하였다. 확인된 54종의 휘발성 화합물중 저온성 느타리 (Pleurotus ostreatus ASI 201)에서는 1-octen-3-ol, 3-octanone, 3-octanol등이, 원형 느타리 (Pleurotus florida--ostreatus-ostreatus)에서는 1-octen-3-ol, n-hexanol, 3-octanone, 3-octanol, phenol등이, 애느타리 (Pleurotus ostreatus)에서는 1-octen-3-ol, n-pentanal, n-hexanol, n-pentanol, 3-octanone, 3-octanol, 1,5-octadien-3-one등이었다. 특히 확인된 성분중에는 탄소수가 8개인 alcohol 및 carbonyl화합물이 많았으며 전체 향기성분에 대한 $C_8$화합물의 비율은 각각 56.60%, 72.46%, 54.84%, 35.85%이었다.

• Fisheries and Aquatic Sciences
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• 제10권3호
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• pp.113-118
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• 2007

Bromophenols are a group of compounds found only in marine organisms. They accumulate and give a sea-like aroma to marine animals. Cultivated fishes generally contain low concentrations of bromophenols compared to wild fishes. Feeding cultivated fishes with bromophenol-containing seaweed could increase their bromophenol content and thus improve their flavor quality. We evaluated the effect of an experimental feed on the bromophenol content of green grouper, Epinephelus coioides, during an 8-week feeding period. Green grouper individuals were divided into two groups and fed with conventional feed or experimental feed containing dried seaweed. Fish were collected biweekly for 8 weeks for proximate analyses and bromophenol content evaluations. Bromophenols were extracted, identified, and quantified by gas chromatography-mass spectrometry. Both moisture and lipid contents were generally higher in the controls; however, total weight and protein content were higher in the experimental group. Only 2,4-dibromophenol and 2,4,6-tribromophenol were detected in the samples. Throughout the 8 weeks, 2,4,6-tribromophenol concentrations were higher in the experimental group (9.20-32.3 ng/g dry wt) than in the control group (7.33-18.79 ng/g dry wt), but no significant difference in 2,4-dibromophenol concentration was detected between the two groups. The total bromophenol content reached a maximum at week 4 for the experimental feed and week 6 for the control. In short, experimental feed that incorporated bromophenol-containing seaweed increased the total bromophenol content in the green grouper.

• Journal of Microbiology and Biotechnology
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• 제17권9호
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• pp.1568-1572
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• 2007

To develop a natural fungicide against Botrytis cinerea and Colletotrichum gloeosporioides, a total of 25 essential oils were tested for their fumigant activity against post-harvest pathogens. The vaporous phases of oils were treated to each fungus on potato dextrose agar medium in half-plate separated Petri plates at $10\;{\mu}g$ per plate. The essential oil of Illicium verum strongly inhibited the mycelial growth of both B. cinerea and C. gloeosporioides by over 90%. On the other hand, the essential oil of Schizonepeta tenuifolia showed inhibitory activity against mycelial growth of only B. cinerea by over 90%. Gas chromatography-mass spectrometry and bioassay indicated trans-anethole in I. verum and menthone in S. tenuifolia as a major antifungal constituent. The essential oils of I. verum and S. tenuifolia and their major constituents could be used to manage post-harvest diseases caused by B. cinerea and C. gloeosporioides.

• 한국환경농학회지
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• 제35권1호
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• pp.15-23
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• 2016

BACKGROUND: Water quality is of concern to water utility operators, public health officials, and populations using the water. If any contaminant is released from a point of entry, it could be spread rapidly throughout the water stream. So the identification of the location of the points of entry and its release history are critical informations to establish the management strategy.METHODS AND RESULTS: Aniline, nonylphenol, pentachlorophenol and formaldehyde in 39 surface water samples were analysed using Gas chromatography-mass spectrometry (GC-MS) methods. Formaldehyde, aniline and nonylphenol were mainly detected in the near sites where industrial waste water and domestic sewage were discharged into stream. But pentachlorophenol was detected in the downstream samples where pulp manufacturing plants were operated.CONCLUSION: Results indicate that pentachlorophenol found in main stream of Guem river was mainly introduced from pulp manufacture industries. Otherwise, formaldehyde, aniline and nonylphenol were mainly contaminated from the industrial waste water and domestic sewage.

• 분석과학
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• 제9권4호
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• pp.392-398
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• 1996

광주천 유역내에 분포된 8개 업종 26개 배출원의 원폐수로부터 인간에게 유해한 11개의 유기화학물질 tetrachloroethylene, ethyl benzene, p-xylene, o-xylene, isopropyl benzene, n-propyl benzene, 1,2,4-trimethyl benzene, 1,3,5-trimethyl benzene, p-isopropyl toluene, see-butyl benzene, naphthalene을 액체-액체 추출법으로 분리하였다. 추출물 중 각 화합물들의 구조는 기체 크로마토그래피/질량분석계(GC/MS)를 사용하여 확인하였고, 표준시료와 비교함으로써 밝혔다.

• 분석과학
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• 제23권5호
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• pp.477-484
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• 2010

항균제 및 자외선 차단물질, 유기인계 난연제 등과 같은 personal care products는 개인이 일상생활에서 광범위하게 사용하는 비누, 화장품, 치약 등에 포함된 합성유기화합물로 하 폐수 처리시설에서 완벽하게 제거되지 않고 생활하수에 포함된 상당수의 양이 환경 중으로 배출되고 있다. 외국사례의 경우 하천, 해양, 토양, 저질, 생물상 등 다양한 환경매체에서 검출되고 있으며, 잔류성 생물농축성이 있어 지속적으로 노출시 생태계 및 인간의 건강에 심각한 영향을 끼칠 우려가 있다. 본 연구에서는 수질환경시료 중 15종의 personal care products를 액-액추출하여 GC/MS로 분석하였으며, 방법검출한계는 $0.004\sim0.273\;{\mu}g/L$의 범위를 나타내었다. 하천수에서는 TCEP, TCPP 등 2종이 검출되었으며, 하수처리장 시료에서는 triclosan, 4-MBC, EHMC, BP-3, TCEP, TPP, TBEP 등 7종이 검출되었다.

• 에너지공학
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• 제25권3호
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• pp.9-17
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• 2016

본 연구에서는 바이오매스 조연제인 리그닌과 글리세린을 이용하여 일산화탄소(CO) 저감형 착화탄을 개발, 연소시 발생하는 일산화탄소 측정을 통해 조연제가 일산화탄소 발생에 미치는 영향을 관찰하였다. 연료의 완전연소를 위해 저온에서 높은 연소성을 보이는 글리세린을 높은 비표면적 값을 가진 리그닌에 함침시켜 연소 특성이 나타날 수 있도록 하였다. 열중량분석기(TGA) 및 가스분석기(GC/MS)를 이용하여 연소성, 탈휘발성 평가 및 일산화탄소 발생량을 측정하였다. 본 연구 결과에서 조연제 함유량에 따른 일산화탄소 발생량을 통해 전체 중량 대비 20% 조연제를 혼합 시 최적의 일산화탄소 저감률을 확인할 수 있었다. 최종적으로 일반 착화탄의 일산화탄소 농도 대비 20~30% 가량 감소한 값을 도출하였다.

• 생약학회지
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• 제51권2호
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• pp.146-150
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• 2020

Amomum Tsao-ko used as a traditional oriental herbal medicine, is indigenous to several Asia countries. This study was carried out to investigate the contamination by Benzo(a)pyrene in Amomum Tsao-ko Fruit of Medicinal Herbs. 20 samples of Amomum Tsao-ko Fruit were evaluated for the Benzo(a)pyrene contamination. They were analyzed for Benzo(a)pyrene using high-performance liquid chromatogrphy(HPLC)-fluorescence detection and the positive samples were confirmed using gas chromatography tandem mass spectrometry. The levels of Benzo(a)pyrene were from 9.2 to 95.5 ㎍/kg and the average was 40.6 ㎍/kg. There are no Benzo(a)pyrene standards for Amomum Tsao-ko Fruit of Medicinal Herbs. These data will be used as a basic data for the future legislation on the regulation and control of benzo(a)pyrene of Amomum Tsao-ko Fruit of Medicinal Herbs.

• 한국식품조리과학회지
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• 제31권3호
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• pp.296-303
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• 2015

We investigate black raspberry (Rubus occidentalis) wine made using traditional yeast (Saccharomyces cerevisiae A8, B6, GBY2, GBY3) and S. cerevisiae Fermivin (FM), which is widely used in wine manufacturing, and analyze the biogenic amine content and the volatile flavor compounds. Black raspberries were separately inoculated with yeast up to $1{\times}10^9CFU/kg$, followed by incubation at $25^{\circ}C$ for 7 days. FM produced the highest alcohol content, however the final fermentation characteristics of the wine made using four different yeasts were similar. S. cerevisiae A8 had a large biogenic amine (BA) content, specifically tryptamine, thus we excluded this yeast from fermentation. S. cerevisiae GBY3 was selected for black raspberry wine fermentation as a result of sensory evaluation. The volatile flavor compounds of two wines (S. cerevisiae GBY3 and FM) were analyzed by gas chromatography and mass spectrometry. 37 compounds in the samples were separated, and several ester compounds were identified in greater amounts in the wine made with S. cerevisiae GBY3 than in the wine made with FM. A greater amount of the major compound, ethyl benzoate, giving the sweet and fruity flavor, was identified in wine made with S. cerevisiae GBY3 than in the wine made with FM. In conclusion, S. cerevisiae GBY3 was confirmed to produce no major BAs and a better flavored wine. These results give new leads in the production of high quality wine.