• 한국식품영양과학회지
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• 제25권3호
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• pp.478-483
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• 1996

The aroma components of Korean green tea in the south western part of Mt. Chiri prepared by the traditional method from native variety were analyzed using GC and GC-MS. The patterns on GC chromatograms of the three samples from the flushes plucked in early spring were similar, though they are prepared by different producers in the area of Hadong-kun, Kyung sang nam-do. A total of 51 aroma compounds were identified in all samples. Main component in the aroma compounds of these teas were geraniol, benzyl alcohol, 2-phenylethanol, $\beta$-ionone, benzyl cyanide and linalool oxides. The aroma components of green teas manufactured by the different plucking periods were also compared. The amounts of geraniol, typical rose floral aroma were particularly decreased in the final plucking period. The amounts of pyrazines and furfuryl alcohol, typical roasted aroma and nutty aroma were slightly increased in later plucking period.

• 생명과학회지
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• 제5권2호
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• pp.20-20
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• 1995

The aroma components of commercial green teas picked inAugust were collected and identified. The extract of aroma compounds in green tea were accoimplished by a modified rotary evaporation. The concentrated wxtracts were analyzed and identified by GC and GC-MS. In GC analysis, T$_{R}$ value of GC represented bt KI value which standardized. The most abundant components of green teas picked in August were 1-Penten-3-ol, trans, trans-2, 4-heptadienal, linalool, $\beta$-ionone and nerolidol.

• 생명과학회지
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• 제5권2호
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• pp.76-80
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• 1995

The aroma components of commercial green teas picked inAugust were collected and identified. The extract of aroma compounds in green tea were accoimplished by a modified rotary evaporation. The concentrated wxtracts were analyzed and identified by GC and GC-MS. In GC analysis, T$_{R}$ value of GC represented bt KI value which standardized. The most abundant components of green teas picked in August were 1-Penten-3-ol, trans, trans-2, 4-heptadienal, linalool, $\beta$-ionone and nerolidol.

• 한국식품과학회지
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• 제41권6호
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• pp.603-608
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• 2009

이 연구에서는 사과 홍로의 향 성분들을 분석하고 기여도를 평가하였다. 사과는 시중에서 유통 중인 홍로를 선택하여 헤드스페이스를 형성시킨 후 $25^{\circ}C$에서 1시간 보관하여 분석을 실시하였다. 향기의 분석은 먼저 관능검사법으로 사과의 복합향기를 측정하고, GC/FID/Olfactometry를 사용하여 개별향기로 분리하였을 때 복합향기의 향기가 검출되는지 확인한 뒤 GC/MS를 이용하여 향기성분을 분석하였다. 향기성분의 기여도는 향기를 수치화하기 위하여 향기지속 시간과 향기강도를 고려하여 향기 값을 계산하여 평가하였다. 향기성분의 분석과 기여도 평가를 통하여 사과의 향에 영향을 주는 향기유발성분의 기여율(%)을 구할 수 있었다. 그 결과 기여율(%)이 가장 높게 나타난 물질은 acetic acid(23%), 1-hexanol(16%), butyl ethanoate(13%), 2-methyl-butyl butanoate (9%) 등 4개의 물질로 나타났다. 이 물질은 관능검사법으로 평가한 복합향기와도 일치하며 향기평가요원들이 가장 많이 인지한 향기이기도 하다. 이것으로 이 물질이 사과의 향을 결정짓는 중요한 인자로 작용한다는 것을 알 수 있었다. 이 물질의 생성 메커니즘을 파악하게 된다면 새로운 사과의 품종 개발에 있어 주요한 영향을 미칠 것이며 소비자의 구매만족도를 향상시킬 수 있을 것이다.

• 한국연초학회지
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• 제27권1호
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• pp.127-133
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• 2005

This study was conducted to determine the aroma and volatile component changes from a different stalk positions of Korean flue-cured tobacco. Eight different stalk positions of flue-cured leaf tobaccos harvested in 2001 were used for this study. Thermal extraction method at two different treatment temperature($50\;amp;\;80^{\circ}C$) was applied for this experiment. Forty eight kinds of aroma and volatile components such as 2,4-heptadienal, hexadecane, 1-methyl-1H- pyridine, 2,5-dimethyl-1H-pyrrole were analyzed by using thermal extraction method. All of aroma and volatile components of leaf tobaccos were changed from a different stalk positions and treatment temperature. Leaf tobaccos in middle stalk position have a higher concentration of aroma and volatile components such as norsolanidione, 4-pyridinecarboxaldehyde, 4-methyl-4-OH-2-pentanone, acetic acid, propylene glycol, 1-methyl-2-pyrrolidinone, 2,5-dimethyl-1H-pyrrole. Also, Megastigmatrienone 1, 3-oxo-[alpha]­ionol, 6,10,14-trimethyl-2-pentadecanone, heptadecane, 6-methyl-2-isohexyl-l-heptene concentration were low in the middle stalk position and high in both bottom and upper position. Treatment temperature affected on the changes of many aroma and volatile components in leaf tobacco. Most of aroma and volatile components such as, 2,4-Heptadienal, dodecanoic methylester, famesol isomer and 3-acetylpyridine were sharply increased as increasing treatment temperature. This results can be used to estimate the aroma characteristics of cigarette blend using a different stalk position of leaf tobacco.

• 한국연초학회지
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• 제6권1호
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• pp.25-31
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• 1984

The volatile aroma components were isolated from Korean flue-cured tobacco (N.C. 2326) by using a vacuum steam distillation method. Individual aroma components were identified by GCIMS and comparison of gas chromatowaphic retention time with those of the authentic samples. Sensory analysis showed that a vacuum steam-distilled product of Flue-cured tobacco had a typical haylike, floral and fruity aroma. Among 62 compounds identified, major compounds included neophytadiene, benzyl alcohol, ethyl acetate, phenyl ethyl alcohol, ethyl alcohol, ethyl formate, acetic acid, solanone, 2-acetyl pyrrole, $\beta$-ionone epoxide, 2, 4-heptadienal (2 isomers), megastigmatrienone (4 isomers), furfural and total amounts of 13 compounds were about 80%.

• 대한가정학회지
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• 제43권2호
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• pp.33-40
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• 2005

This study compared the volatile aroma components in high grad Korea, Chinese and Japanese green tea. The aroma components of green tea were analyzed and compared. Aroma compared. Aroma compounds were extracted by a simultaneous distillation and extraction method using Likens and Nickerson's extraction apparatus. The concentrated aroma extract was analyzed and identified by GC and GC-MS. All the green tea samples contained relatively large amounts of terpene alcohols such as linalool, geraniol and nerolidol. The Korean green tea (A) manufactured in Cheju island contained remarkably large amounts of geraniol (9.12 %) and linalool (5.18 %). The Korean green tea (B) manufactured in Hawgae contained remarkably large amounts of geraniol (5.85 %) and linalool (5.33 %). The Korean green tea (C) manufactured in Bosung contained remarkably large amounts of linalool (7.79 %) and Z-jasmone (3.08 %). The Chinese green tea (D) manufactured in Longjing contained remarkably large amounts of geraniol (3.43 %) and linalool (2.86 %). The Japanese green tea (E) manufactured in Shizuoka contained remarkably large amoung of linalool (3.95 %) and nerolidol (2.76 %).

• Journal of Microbiology and Biotechnology
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• 제6권4호
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• pp.278-285
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• 1996

We identified volatile components of traditional Korean soy sauce and soybean paste which had been manufactured with the same traditional Meju with a view to improving the quality of traditional Korean soy sauce and soybean paste. All of the volatile components were extracted by simultaneous steam distillation-extraction (SDE) apparatus. To obtain more detailed information, whole volatile components were separated into fractions. The volatile components of the whole and of each fraction were identified by GC-mass and Kovat's retention index. Sixty two and eighty six components were identified in traditional Korean soy sauce and soybean paste, respectively. Many aroma components of traditional Korean soy sauce differ from those of traditional Korean soybean paste. It was confirmed that many aroma components of traditional Korean soy sauce and soybean paste are completely different from those of Japanese fermented soy sauce (Shoyu) and soybean paste (Miso).

• 한국축산식품학회지
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• 제40권4호
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• pp.649-658
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• 2020

This study compared aroma compositions and sensory aroma attributes of raw and cooked Tenebrio molitor larvae (mealworms). Main sensory aroma attributes of raw mealworms were strong wet-soil-like, and less-intense oily, shrimp-like and sweet-corn-like. Quantitatively, the major aroma components of raw mealworms were hydrocarbons and aldehydes. As cooking proceeded, sweet-corn-like, roasted, and fried-oil-like sensory attributes were increasingly perceived with steaming, roasting, and frying, respectively. Some pyrazines, pyrrolidines, and carbonyls increased or appeared in roasted and fried mealworms. Partial least squares regression also showed differences in raw and cooked mealworms based on aroma components and their sensory attributes. Unlike raw mealworms, steamed mealworms had a relatively strong sweet-corn-like aroma attribute, which was related to 2,4,6-trimethyl-heptane, 2,4-dimethyl-dodecane, and 3,5-dihydroxy-6-methyl-2,3-dihydropyran-4-one. In comparison, roasted and fried mealworms exhibited roasted, shrimp-like, and fried-oil-like aroma attributes, which were associated with intermediates of the Maillard reaction and lipid oxidation, such as pyrazines, alcohols, and aldehydes. This result during thermal reactions was very similar to those of meat and/or seafood. The use of mealworms as a savory-type flavor enhancer can be expected.

• 한국식품과학회지
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• 제33권5호
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• pp.529-533
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• 2001

사찰을 중심으로 극히 일부 제조되고 있는 반발효차를 시료로 하여 기호면에서 무엇보다 중요한 향기성분을 중심으로 분석하여 우리 입맛에 맞는 다양한 제품개발을 하여 상품화하는데 그 기초 자료로 삼고자 하였다. 시료로는 수확시기 및 장소가 다르고 제조방법이 약간 다른 3종의 반발효차와 비교시료로서 1종의 녹차를 이용하였다. 휘발성 향기성분의 추출에는 Likens and Nickerson형 동시증류추출장치를 사용하였고 분리 및 동정에는 GC 및 GC-MSD를 사용하였다. 국내산 찻잎으로 만든 반발효차의 경우 수확시기가 아주 늦지 않고 솥에서 건조한 시료1(S1)과 시료3(S3)의 경우 특히 관능적으로도 향미나 색택이 매우 우수하였다. 반발효차의 향기성분으로는 총 47종의 화합물이 동정되었다. 공통적으로 동정된 주요 화합물은 3-methylbutanal, 2-methylbutanal, (E)-2-hexenal, phenylacetaldehyde, 2-phenyl ethanol, geraniol, ${\beta}-ionone$ 및 nerolidol 등이었다. 녹차와 비교하면 특히 phenylacetaldehyde, 2-methylbutanal등의 함량이 많은 것이 특징이었다. 향기성분의 조성으로 볼 때 3 종류와 시료 모두 비교적 우수한 편이었다. 반발효차는 녹차에 비해 수확시기가 늦은 찻잎을 이용해도 좋으며 보관기간이 녹차보다 긴 장점을 살려 다양하게 상품화하는 것이 바람직하다고 생각되어진다.