• 한국미생물·생명공학회지
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• 제27권5호
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• pp.354-358
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• 1999

In order to know the antifungal characteristics of saturated fatty acids having 6 to 12 carbons, their minimum inhibitory concentrations (MICs) and minimum fungicidal concentrations (MFCs) were estimated against Saccharomyces cerevisiae. Fatty acids from C6 to C11 exhibited increasing activity with chain length, but C12 fatty acid did not show activity at all. In relation to antifungal modes of actions, fatty acids investigated showed on inhibitory activity toward the plasma membrane H+-ATPase of Saccharomyces cerevisiae. Their inhibitions to the glucose-induced acidification and ATP hydrolysis caused by the proton pump were found to be in common wiht antifungal activities. At the test concentration of 1mM, hexanoic acid (C6) showed the lowest inhibition of about 30%, while undecanoic acid(C11) showed the strongest inhibition of over 90%. In addition, as seen with antifungal activity, the inhibitory activity of dodecanoic acid (C12) was suddenly reduced to less than 50%.

• 한국균학회지
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• 제9권2호
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• pp.99-101
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• 1981

Attempts were made to investigate on the fatty acids of Lentinus lepideus Fr. Fats were extracted from its carpophores and saponified with alcoholic potassium hydroxide. Isolated fatty acids were methylated and were subjected to column chromatography and GLC. Six saturated fatty acids, i.e., dodecanoic, tridecanoic, tetradecanoic, pentadecanoic, hexadecanoic and octadecanoic acids were identified. Especially myristic acid was abundant. Four unsaturated fatty acids, i.e., hexadecadienoic, oleic, linoleic, linolenic acids, were identified. Especially oleic and linoleic acid were abundant.

• Bulletin of the Korean Chemical Society
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• 제34권12호
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• pp.3787-3789
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• 2013

In this study, the silicone thermal curing degree of the silicone-encapsulated quantum dot light emission diode was measured using the various types of chemical ligands around quantum dot. It was confirmed that the trioctyl phosphin oxide (TOPO) ligand around the quantum dot was responsible for dispersion of the quantum dot in silicone encapsulant and decline of the thermal curing degree of the silicone encapsulant. Also, it was confirmed that the thermal curing degree of silicone encapsulants containing the steric acid (SA) and the dodecanoic acid (DA) ligands were higher than the one of TOPO ligand.

• 한국균학회지
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• 제6권1호
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• pp.5-8
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• 1978

Attempts were made to investigate on the fatty acids of Agaricus bisporus, a cultivated edible mushroom. Fats were extracted from it and saponified with alcoholic potassium hydroxide. Isolated fatty acids were methylated and were subjected to column chromatography and G.L.C. Eleven saturated fatty acids, i.e., dodecanoic, tridecanoic, tetradecanoic, pentadecanoic, hexadecanoic, heptadecanoic, octadecanoic, eicosenoic, uncosenoic, docosenoic, and tricosenoic acids, were identified. Especially palmitic and stearic acids were abundant. Nine unsaturated fatty acids appear to exist in the carpophore.

• 한국조리학회:학술대회논문집
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• 한국조리학회 2005년도 정기추계학술세미나
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• pp.61-86
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• 2005

Kimchi power made by kimchi fermentation and freeze-drying was added to Western foods of sauce, soup, pizza, cracker and bread. Flavor qualities of the processed fusionfoods were evaluated by analyzing volatile compounds and sensory evaluation. The optimum condition of kimchi fermented for the best flavor quality of freeze-drying was the ranges of pH4.0${\sim}$pH4.7 and acidity 0.5${\sim}$0.8. The number of volatile compounds identified from extracts of the freeze-dried kimchi powder was 24, which contained 7 alcohols, 5 esters, 5 acids, 3 sulfur-containing compounds, 2 aldehydes, 1 oxygen-containing and 1 other. Among the identified compounds, the most abundant compound was eugenol(39.40%), followed as the order of dodecanoic acid(4.91%), acetic acid(1.70%), methyl 2-propenyl disulfide(1.52%), hexanal(1.51%) and 2-pentylfuran(1.18%). These compounds affected the flavor quality of kimchi powder.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 가을 학술논문 발표대회
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• pp.42-43
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• 2020

Lauric acid (LA) which is also known as dodecanoic acid has been selected as the phase change material (PCM) owing to eco-friendly in nature. A systematic study has been conducted for encapsulation of LA (core) with silicon dioxide (SiO2) as shell material. Different core-shell ratio was chosen to microencapsulate the LA with 10 ml of tetraethyl orthosilicate (TEOS) as the precursor solution for the formation of SiO2. The synthesis of microencapsulated LA was carried out at 2.5 pH of precursor solution. The synthesized microencapsulated LA are characterized by Fourier transform infrared spectroscope (FT-IR) and X-Ray Diffraction (XRD) which confirmed the presence of SiO2 shell on the surface of LA.

• 한국환경농학회지
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• 제35권3호
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• pp.191-201
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• 2016

본 연구에서는 30종의 한약재 주정추출물을 대상으로 탄저병(Colletotrichum acutatum) 외 8종의 식물병원균에 대한 살균효과 검정을 실시하였다. 그 결과, 대추(Zizyphus jujuba) 주정추출물 및 hexane 분획물이 역병균(P. capsici), 무름병균(E. carotovorum subsp. carotovora), 세균성점무늬병균(P. syringae pv. syringae) 및 풋마름병균(R. solanacearum)에 대하여 광범위하게 살균효과를 나타내었다. 대추(Z. jujuba) hexane 분획물의 주성분을 GC/MS로 분석한 결과, eugenol(40.45%), dodecanoic acid(18.40%), β-caryophyllene(10.05%) and isoeugenol(9.85%) 임을 확인하였다. 이 중 eugenol과 isoeugenol에서 저지환 크기가 15 mm 이상인 높은 살균활성을 나타내었다. 또한 역병균(P. capsici)에 대한 균사생육억제활성과 무름병균(E. carotovorum subsp. carotovora), 세균성점무늬병균(P. syringae pv. syringae) 및 풋마름병균(R. solanacearum)에 대한 낮은 MIC 값을 확인하였다. 이로 인해 대추(Z. jujuba) 주정추출물, eugenol 및 isoeugenol은 다양한 식물병원균 방제에 이용될 수 있을 것으로 생각된다.

• 한국식품영양학회지
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• 제24권3호
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• pp.471-479
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• 2011

This study analyzes flavor ingredients according to types of whisky and maturation periods based on total 40 different types of whisky that are mainly distributed to Korea via imports. Whisky was classified into four categories based on origin, and also into different categories based on maturity period, ingredients such as fusel alcohol, fatty acid, and fatty acid esters and proportion of patterns were analyzed. As a result of an analysis for fusel alcohol, high qualified types of alcohol including 3-methylbutanol, 2-methylbutanol, iso-butanol, and 1-propanol were detected from all Scotch whiskys, America whiskys, and Canadian whiskys. In particular, the proportional sum of 3-methylbutanol and 2-methylbutanol, and the sum of 3-methylbutanol and 2-methylbutanol/iso-butanol were regarded as core factors to determine each type of whisky. Acetaldehyde, ethyl acetate, and acetic acid increased as maturation and storage period became longer. As a result of the fatty acid and fatty acid ethyl ester analysis, the major fatty acids were dodecanoic acid and decanoic acid, both with detection of octanoic acid and hexanoic acid. However, dodecanoic acid, decanoic acid, and octanoic acid were lower than the detectable limit in American and Canadian whiskys, showing a unique phenomenon that hexanoic acid was detected only in very small amounts. Malt Scotch whisky showed higher significance than blended Scotch whisky, making it possible to classify types of whisky. Fatty acid ethyl ester contents showed significance with fatty acid either. In addition, changes in the whiskys based on maturation period were confirmed via proportions of fatty acids and fatty acid ethyl esters. In general, the proportion of fatty acids and fatty acid ethyl esters decreased as the storage period increased. This study provided basic data to classify types of whisky based on maturation periods by analyzing the proportion of flavor ingredients such as fusel alcohols, fatty acids, and fatty acid ethyl esters.

• Applied Biological Chemistry
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• 제34권2호
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• pp.102-109
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• 1991

아카시아꿀, 잡화꿀, 밤꿀을 대상으로 일반성분 및 유리당을 정량분석하고 지방산을 GC-MS로써 분석한 결과 아카시아꿀, 잡화꿀, 밤꿀의 평균 수분 함량은 각각 19.7, 19.1, 18.9%이었으며 회분은 각각의 평균이 0.028, 0.050, 0.050%로서 아카시아꿀에서 비교적 낮았다. 벌꿀의 HMF (hydroxy methyl furfural)는 아카시아꿀과 잡화꿀의 평균함량이 18mg/kg정도이나 밤꿀은 다소 높은 20.21mg/kg 이었으며 유리산도는 밤꿀이 평균 2.28 meq/kg으로서 가장 높으며 아카시아꿀에서는 8.85 meq/kg으로서 가장 낮았다. 유리당의 함량은 밀원의 종류에 관계없이 3종 모두 포도당 $31.0{\sim}32.0%$, 과당 $35.0{\sim}36.0%$이었고 과당/포도당의 비율도 3종 모두 거의 동일한 1.14 정도이었다. GC-MS에 의한 자방산의 분석에서는 dodecanoic acid, 10-hydroxydecenoic acid, 6,9-undecadienoic acid, tetradecanoic acid, 12-(acetyl oxy)-9-octadecenoic acid 및 14-octadecenoic acid가 확인되었으며, 벌꿀의 품질판정에 이용되고 있는 10-hydroxydecenoic acid의 함량은 3증 모두10mg% 내외이며 $20{\sim}30mg%$에 달하는 시료도 있는 반면 검출되지 않은 시료도 있었다.

• 한국식품과학회지
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• 제43권4호
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• pp.419-425
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• 2011

머스크멜론의 저장온도 차이에 따른 저장 중 미세한 향기성분의 변화를 질량분석기 기반 전자코를 이용하여 품질 변화 정도를 판단하였다. 저장기간이 증가함에 따라 향기성분이 변화하면서 휘발성분이 증가하였는데, 판별함수분석 결과 DF1값이 99.8%로 큰 영향을 받았으며 향기성분의 변화가 크게 나타날수록 DF1 값이 음의 방향으로 이동하였다. 이후 DF1 뿐만 아니라 DF2도 음의 값으로 변하면서 저장 초기와는 확연히 다른 향기성분의 변화가 일어난 것으로 판단된다. 0$^{\circ}C$ 저장에서는 28일, 4와 7$^{\circ}C$에서는 21일, 10$^{\circ}C$에서는 14일까지 저장 초기와 유사한 향기성분을 나타났으며, 이는 저장 온도가 낮아질수록 휘발성분의 변화가 적게 일어났다. 이러한 향기성분의 변화는 머스크멜론이 저장 중숙기가 지나고 노화가 진행되어지면서 일어난 것으로 유추된다. 또한 전자코로 분석한 DF1 값을 이용하여 일반성분들(비타민 C 함량, 꼭지 수분함량, 산도)의 저장 중 경향도 예측 가능 하였다. 머스크멜론의 저장 중 변화하는 전자코의 mass spectrum에 나타난 주요 향기성분은 이미 보고된 GC/MS의 분석 결과와 유사한 ethyl acetate, butyl acetate, nonanol, dodecanoic acid, hexadecanoic acid, tricosane과 같은 성분들로 나타났으며, 저장 중 전자코에 감지되는 양은 계속적으로 증가하였다.