• 한국환경과학회지
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• 제32권2호
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• pp.139-143
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• 2023

The effects of essential oils on pH, pathogens, and volatile fatty acids (VFA) in two poultry litters were investigated through a lab study. Essential oil-added poultry litters were randomly divided to two groups: control (200 g poultry litter) and Treatment (50 g thymol/Briefly, 200 g broiler litter was treated with or without 50 g thymol (Control and T1, respectively; 1 groups) and 200 g duck litter was treated with or without 50 g carvacrol (Control and T2, respectively; 2 group). Adding thymol to broiler litter increased the pH, reduced pathogens, and did not affect VFA. Interestingly, adding carvacrol slightly reduced the pH of duck litter, but had no significant effect on reducing pathogens and VFA. This difference is probably because the essential oil used and the properties of the two litters are different. In addition, pH was thought to control the odor generated from the litter, but this has not been proven. Further field studies should focus on clarifying this point.

• 한국수소및신에너지학회논문집
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• 제33권1호
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• pp.77-84
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• 2022

The experimental work has been carried out for the study of pyrolysis of oil samples used in industrial and utility boilers in Korea. For five oil samples, the characteristics of pyrolysis have been investigated with a thermogravimetric analyzer (TGA), and their kinetic parameters were obtained and compared each other. The rate order of pyrolysis rate for five oils were as follows: by-product fuel oil, pyrolysis oil, diesel, a heavy oil and refined oil. The pyrolysis of refined oil has been successfully described by the three step, first order reaction model while the single step reaction model has been used for other oils. For the reaction temperature over 550 K, the reactivity of refined oil was very poor compared with other oils.

• 한국동물학회:학술대회논문집
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• 한국동물학회 1998년도 한국생물과학협회 학술발표대회
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• pp.212.2-212
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• 1998

No Abstract, See Full Text

• 한국식품과학회지
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• 제25권5호
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• pp.494-501
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• 1993

The volatile flavor components of traditional and commercial kochujang were collected by simultaneous steam distillation-extraction (SDE) method. Essential oils were analyzed by gas chromatography (GC) and combined gas chromatography-mass spectrometry (GC/MS). Tested kochujang included Sunchang kochujang prepared with glutinous rice, Boeun kochujang prepared with barley, Sachun kochujang prepared with wheat and commercial kochujang. One hundred and twelve volatile flavor components which included 30 esters, 15 alcohols, 14 aldehydes, 13 acids, 9 ketones, 7 alkenes, 6 phenols, 3 alkanes, 3 pyrazines, 2 benzenes and 2 furans were identified. The major volatile compounds in traditional and commercial kochujang were 2-methyl propanal and ethanol, which represented $21{\sim}36%\;and\;2{\sim}44%$ of total GC peak area, respectively.

• Applied Biological Chemistry
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• 제33권1호
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• pp.62-67
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• 1990

파슬리의 잎과 씨로부터 휘발성 향기 성분을 분리한 다음 GC-MS 및 GC에 의한 머무름 시간의 비교에 의해 성분을 확인하였다. 잎과 씨에서 휘발성 성분의 함량은 각각 0.06 %와 3.11 %이었다. 잎에서는 mass spectrum에 의해 잠정적으로 확인된 15종의 성분을 포함하여 58종 그리고 씨에서는 23종의 성분이 확인되었다. 그 중 43종의 terpene화합물이 잎에서 분리한 휘발성 성분의 약 46.4 %를 차지하였고 씨에서는 49.3 %를 차지하였다 잎에서 양적으로 많이 함유된 terpene 화합물은 myrcene(3.01 %), 4-isopropenyl-1-methyl benzene(4.52 %), ${\rho}-1$, 3, 8-menthatriene(10.49 %)인 반면 씨에서는 ${\alpha}-pinene$(22.28 %)와 ${\beta}-pinene$(16.20%)이었다. 한편 두 oil에서 가장 풍부하게 함유된 성분은 myristicin으로서 잎과 씨에서 각각 전체 향기성분의 21.80 % 및 47.54 %를 차지하였다.

• The Plant Pathology Journal
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• 제23권2호
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• pp.97-102
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• 2007

A total of 39 essential oils were tested for antifungal activities as volatile compounds against five phytopathogenic fungi at a dose of 1 ${\mu}l$ per plate. Five essential oils showed inhibitory activities against mycelial growth of at least one phytopathogenic fungus. Origanum vulgare essential oil inhibited mycelial growth of all of the five fungi tested. Both Cuminum cyminum and Eucalyptus citriodora oils displayed in vitro antifungal activities against four phytopathogenic fungi except for Colletotrichum gloeosporioides. The essential oil of Thymus vulgaris suppressed the mycelial growth of C. gloeosporioides, Fusarium oxysporum and Rhizoctonia solani and that of Cymbopogon citratus was active to only F. oxysporum. The chemical compositions of the five active essential oils were determined by gas chromatography-mass spectrometry. This study suggests that both E. citriodora and C. cyminum oils have a potential as antifungal preservatives for the control of storage diseases of various crops.

• 한국식품과학회지
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• 제30권2호
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• pp.260-265
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• 1998

참깨를 170, 200, $230^{\circ}C$로 열풍순환식과 전기팬에서 볶아서 참유한 기름의 향기 성분을 GC와 GC-MS로 분석하여 동정 확인하고 관능 검사를 실시하였다. 총 33개의 향기성분이 확인 되어졌으며 pyrazine류 14종, thiazole류 7종, pyridine류 4종, oxazole류 2종 및 기타 6종 이였다. 전기팬에서 170, 200, $230^{\circ}C$에서 처리된 시료의 총 향기성분의 함량은 각각 145.29, 334.65, 313.04 ppm 이였고 열풍순환식에서는 각각 28.86, 81.20, 313.28 ppm이 였다. 그리고 개별향기 성분중에서는 pyrazine류의 함량비가 가장 높았다. 6개의 시료에 대한 관능 검사의 결과는 $200^{\circ}C$에서 배전식 방법으로 볶은 참깨로부터 제조된 참기름이 가장 바람직한 향기를 가진것으로 판단되어졌다. 이런 현상은 GC 분석의 결과와 일치하였다.

• 한국식품조리과학회지
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• 제14권5호
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• pp.547-552
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• 1998

신선한 섬쑥부쟁이의 휘발성 향미성분을 분석하여 31가지의 peak를 확인하였다. 확인된 휘발성 향미성분은 탄화수소류가 17종으로 peak area 58.90%이었으며, 알코올류 7종 8.51%, 에스테르류 3종 2.1%, 옥사이드류 1종 2.10%, 산류 1종 1.65% 및 알데히드류 1종 0.48%로 나타났다. 섬쑥부쟁이의 주요 휘발성 향미성분은 $\alpha$-pinene, limonene, $\delta$-elemene, $\beta$-pinene, cis-3-hexenol 및 myrcene으로 사료된다. 신선한 섬쑥부쟁이를 전자코로 분석한 결과 알코올과 같은 극성화합물을 민감하게 감지하는 PA2 sensor의 저항값이 가장 높게 나타났다. 건조된 섬쑥부쟁이의 휘발성 향미성분의 패턴은 신선한 시료와 동일하였으나, 6개의 metal oxide sensor의 저항값은 신선한 시료 보다 모두 크게 나타났다. 또한 전자코에 의한 신선한 시료와 건조된 시료의 향미성분의 강도 비교는 관능검사와 일치하였다.

• Journal of the Korean Wood Science and Technology
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• 제46권2호
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• pp.166-177
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• 2018

Plant essential oils are defined as fragrant volatile oils extracted from leaves, stems, fruits, flowers, and roots of a plant. Such oils are composed of multiple components and multiple functions. By accumulation of inductive information, various plant essential oils have been studied for using in therapeutic medicine for various diseases. Despite of the apparent advantages of essential oils as a source of therapeutic medicines, plant essential oils have many limitations, including cytotoxic side effects. Therefore, it is necessary to evaluate the toxicity and the mechanisms of cytotoxicity of such oils. In this study, we evaluated the cytotoxicity to human-derived cell lines of 10 plant essential oils provided by National Institute of Forest Science (i.e., Larix kaempferi; Abies holophylla; Zanthoxylum ailanthoides; Pinus parviflora; Tsuga sieboldti; Chamaecyparis pisifera; Cryptomeria japonica; Pinus densiflora; Illicium anisatum; Pinus thunbergii). Cytotoxicity evaluations were accomplished by using CCK-assays and PCR-based cytotoxicity-related marker gene analyses with A549 cell line, and the Detroit551 cell line which are lung and skin cell line. The genes were analyzed included caspase-3 has a role in cell apoptosis, and the other cyclinA, cyclinB, cyclinD, and cyclinE regulated cell cycling for the cell proliferation. By examining the five cytotoxicity-related marker genes by performing real-time PCR and examined the cytostatic gene regulation associated with the various essential oils. The results of this study showed that the degree of cytotoxicity and the cytostatic gene regulation which could give precious information for using the plant essential oil for the clinical usages.

• 한국식품저장유통학회지
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• 제12권5호
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• pp.465-469
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• 2005

대파를 부위별로 분획하여 대파 전체, 잎, 줄기, 뿌리를 동량 처리하여 각각 autoclaving법에 의하여 대두유를 기질로 WOSO를 제조하였다. 이들 4종 WOSO의 이화학적 특성은 큰 차이가 없었으며, 대파 잎향미유의 경우 Lovibond 색상에서 고유의 청색을 상대적으로 강하게 나타내는 특성을 나타내었다. 휘발성 향기성분은 총 35종이 검출되었으며, 주요 향기성분은 methyl propenyl trisulfide와 propenyl propyl trisulfide이었으며, 각각 대파 뿌리향미유에서 가장 높은 26.94 ppm, 26.26 ppm으로 나타났다. 이와 함께 propenyl propyl disulfide 등이 WOSO의 향미특성에 큰 영향을 미치는 성분인 것으로 판단된다. 또한, carbonyl 화합물 함량은 각각 79.46 ${\mu}g$, 77.17 ${\mu}g$, 76.32 ${\mu}g$, 73. 62 ${\mu}g$이었다. 결론적으로 WOSO에서 고유의 구수한 향미를 나타내는 부위는 잎이나 줄기가 아니라 뿌리 부분임을 확인할 수 있었다.