• Title/Summary/Keyword: flavor research

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Difference in Volatile Flavor Components among Milling Fractions of Wheat (밀 제분부위별 휘발성 성분의 차이)

  • Han Ouk-Kyu;Kim Yang-Kil
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.50 no.6
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    • pp.442-446
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    • 2005
  • This study was conducted to obtain basic information on the utilization of wheat flour for good organoleptic evaluation score. Wheat seed was milled by Buhler test mill. Volatile flavor compounds of five milling fractions such as Break $I{\cdot}II (B_1+B_2)$, Reduction I ($R_1$), Reduction II ($R_2$), Bran and Short were determined and their differences were discussed. There was significant difference in quantity of flavor compounds but no difference in qualitative composition among milling fractions. The outer layer of wheat endosperm ($R_2$ layer) showed higher amount of m-xylene and n-butanol in volatile flavor com­pounds compared with inner endosperm layer ($B_1,\;B_2,\;R_1$). The $R_2$ layer showed quantitatively higher composition of major flavor compounds than inner endosperm layer ($B_1,\;B_2,\;R_1$). This result points out that the $R_2$ layer exhibited stronger flavor than $B_1,\;B_2$, and Rl layers.

Sensory Drivers of Liking for Adlay (Coix lacryma-jobi) Tea (시판 율무차의 소비자 기호 유도 인자)

  • Gwak, Mi-Jin;Chung, Seo-Jin;Kim, Yang
    • Journal of the Korean Society of Food Culture
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    • v.27 no.5
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    • pp.512-520
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    • 2012
  • This study investigated the sensory characteristics of adlay tea favorably consumed by Korean consumers and analyzed the drivers behind for liking or disliking adlay tea. Six adlay tea products showing the highest market share in South Korea were selected. Sensory properties of the six products were analyzed using generic descriptive analysis. Among these, four products were further selected for consumer taste acceptance test. Sensory lexicons of adlay tea were developed by trained panelists, and the sensory characteristics of each adlay tea product were measured based on the perceived intensities of these attributes elicited from the samples. In the consumer taste acceptance test, frequent tea and coffee drinkers participated. Consumers rated the acceptance of each tea product on a 9-point hedonic scale and evaluated the reasons for liking or disliking each product based on the check-all-that-apply method. Analysis of Variance, principal component analysis, frequency analysis, and correspondence analysis were utilized for statistical analysis. Twenty sensory attributes were developed in order to characterize the six adlay tea products. The results of the descriptive analysis showed that attributes such as viscosity, black soybean flavor, goso flavor, peanut flavor, seaweed flavor, green, and presence of chunks were key factors differentiating the adlay tea products. In the consumer taste test, roasted flavor, goso flavor, peanut flavor, and presence of chunks were positive drivers for liking the adlay tea products, whereas seaweed and green flavors were negative attributes that drove consumers away.

The Impact of Proteolytic Pork Hydrolysate on Microbial, Flavor and Free Amino Acids Compounds of Yogurt

  • Lin, Jinzhong;Hua, Baozhen;Xu, Zhiping;Li, Sha;Ma, Chengjie
    • Food Science of Animal Resources
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    • v.36 no.4
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    • pp.558-565
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    • 2016
  • The aim of this study was to investigate the influence of proteolytic pork hydrolysate (PPH) on yoghurt production by Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus. Fresh lean pork was cut into pieces and mixed with deionized water and dealt with protease, then the resulting PPH was added to milk to investigate the effects of PPH on yoghurt production. The fermentation time, the viable cell counts, the flavor, free amino acids compounds, and sensory evaluation of yoghurt were evaluated. These results showed that PPH significantly stimulated the growth and acidification of the both bacterial strains. When the content of PPH reached 5% (w/w), the increased acidifying rate occurred, which the fermentation time was one hour less than that of the control, a time saving of up to 20% compared with the control. The viable cell counts, the total free amino acids, and the scores of taste, flavor and overall acceptability in PPH-supplemented yoghurt were higher than the control. Furthermore, the contents of some characteristic flavor compounds including acids, alcohols, aldehydes, ketones and esters were richer than the control. We concluded that the constituents of PPH such as small peptide, vitamins, and minerals together to play the stimulatory roles and result in beneficial effect for the yoghurt starter cultures growth.

Analysis of Preservatives in Flavor-Containing Foods (향기성분이 있는 식품의 보존료 분석)

  • Kim, Jin-Ho;Kim, Hyeon-Wee;Cha, Ik-Soo;Lee, Yoon-Kyoung;Park, Ki-Moon
    • Korean Journal of Food Science and Technology
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    • v.28 no.6
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    • pp.1033-1037
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    • 1996
  • An attempt was made to analyze preservatives in flavor-containing curry and tomato ketchup without interference due to their of flavor components. Samples were steam-distillated and extracted with ether. Sorbic acid, benzoic acid, dehydroacetic acid and salicylic acid were analyzed by GC with capillary column. Benzoic acid and dehydroacetic acid in curry were interfered by flavor components, but there was no interference in case of tomato ketchup. Samples were pretreated with Sep-Pak $C_{18}$ cartridge and analyzed with HPLC to avoid any interference due to flavor components. The recoveries by HPLC were higher than those by GC. Recoveries of sorbic acid, benzoic acid and salicylic acid from curry were 79.9%, 71.2% and 64.4%, respectively. Recoveries of sorbic acid, benzoic acid and salicylic acid from tomato ketchup were 83.4%, 87.8% and 77.7%, respectively.

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Flavor Characteristics of Korean Red Ginseng (한국홍삼의 향 특성)

  • 손현주;이성계;위재준
    • Journal of Ginseng Research
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    • v.24 no.3
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    • pp.148-152
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    • 2000
  • The flavor characteristics of the Korean red ginseng were compared with those of the Chinese red ginseng organoleptically. The Korean red ginseng had strong sweety and roasted odor while the Chinese red ginseng had strong earthy, woody and hay-like odor. The sweety odor and the roasted odor of the Korean red ginseng occurred in the neutral subfraction of the ether-soluble fraction of its headspace volatiles.

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Analysis of Volatile Flavor Constituents in Green Tea Flower (녹차나무꽃의 향기성분 분석)

  • Baik, Soon Ok;Bock, Jin Young;Han, Sang Bin;Cho, Kyung Suk;Bang, Guk PiI;Kim, Il Kwang
    • Analytical Science and Technology
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    • v.9 no.4
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    • pp.331-335
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    • 1996
  • Flavor constituents of green tea flower produced in Korea were analyzed by gas chromatography and mass spectrometry. 56 compounds in sample were separated and indentified as 22 hydrocarbons, 14 alcohols, 6 aldehydes, 5 esters, and 9 others. Higher concentrated substances were heneicosyl formate, ${\alpha}$-phenyl ethyl alcohol, and acetophenone. Germacrene D as a sesquiterpene were also identified.

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A Study on the Sensory Characteristics of Korean Red Wine (한국산 적포도주의 관능적 특성에 관한 연구 (III))

  • Lee, Jang-Eun;Hong, Hee-Do;Choi, Hee-Don;Shin, Yong-Sub;Won, Yoo-Dong;Kim, Sung-Soo;Koh, Kyung-Hee
    • Korean Journal of Food Science and Technology
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    • v.35 no.5
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    • pp.841-848
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    • 2003
  • The sensory characteristics of red wine Gerbong (G), Campbell (C), Moru (M), Gerbong + Moru (70 : 30, GM), Gerbong + Campbell (70 : 30, GC) and French wine (F, Carbernet Sauvignon, 1998) were evaluated. The preferences of color, flavor, taste and total evaluation were determined by a ranking test, and the organoleptic characteristics were evaluated by a quantitative descriptive analysis (QDA) method. The mean color scores of C, GM, F, GC, M and G were 4.74, 3.94, 4.67, 3.70, 2.65 and 1.47, respectively (p<0.001). The order for the mean score for flavor was GM (4.12) = M (3.94) = C (3.76) = F (3.76) ${\geq}$ GC (3.12)>G (2.29) (p<0.01), and the order for taste was F (4.75) ${\geq}$ C (4.25) ${\geq}$ GM (3.37) = GC (3.50) ${\geq}$ G (2.75) = M (2.37) (p<0.001). The total evaluation of mean scores showed G, M, C, GM, GC and F were 237, 2.44, 4.06, 3.87, 3.64 and 4.81, respectively (p<0.001). Influences of sensory characteristics on the total evaluation, in percentages, were 69.3% for taste, 3.7% for color, and 1.5% for flavor. The influences of taste, color, and flavor in red wine were 17% for sweet, acid, bitter and salty taste, 28.9% for purple and red color, and 14.4% for grape flavor. The attributes of the purple and red colors showed a positive correlation with grape flavor, oak flavor, grape taste, and floral tastes, but a negative correlation with $SO_2$, flavor. The attribute of sweet taste showed a positive correlation with grape flavorand floral flavor, but a negative correlation with bitter and astringency tastes, according to Pearsons correlation analysis (p<0.01).

A Study on effects of favor in pizza added oregano and kimchi. (Oregano와 김치 첨가가 Pizza의 맛에 미치는 영향)

  • 조용범;박우포;정순경
    • Culinary science and hospitality research
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    • v.6 no.2
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    • pp.23-30
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    • 2000
  • Kimchi was added to enhance the acceptability of pizza sauce and pizza for Korean adults, and flavor 1ike oregano was also mixed to investigate the compatibility with kimchi flavor. Pizza sauce with kimchi showed a high crude protein and low crude fat content. Pizza sauce with 20% kimchi showed the highest score in flavor, taste, color and overall acceptability, was significantly different from control in quality indices except taste. Pizza with 21, kimchi powder in mixing dough showed a higher score in sensory evaluation than that of only 20% kimchi added pizza sauce.

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Flavor Components of Acetic Fermented Onion Extracts (초산 발효과정 중 양파착즙액 휘발성 향기성분 변화)

  • Jeong, Eun-Jeong;Cha, Yong-Jun
    • The Korean Journal of Food And Nutrition
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    • v.30 no.4
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    • pp.788-795
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    • 2017
  • This research has attempted to investigate the volatile flavor compounds of onion products through acetic fermentation, and to create a natural beverage with beneficial biological properties which can also fulfill customer quality standards. Onion products (OAF (M): Onion extracts at five days of acetic fermentation, OAF (F): Onion extracts at ten days of acetic fermentation) were produced by acetic fermentation. Volatile flavor compounds from onion extracts, OAF (M) and OAF (F) were used by Mixxor liquid extractions and analyzed by GC/MSD. Compounds of 49, 75 and 69 were identified in onion extracts, OAF(M) and OAF(F) respectively. Among the major volatile flavor compounds classes, sulfur containing compounds (36.7%), acids (31.2%) and aldehydes (13.5%) in onion extracts were changed into acids (69.6%) and alcohols (24.6%) in OAF (M) and acids (80.6%) and alcohols (15.5%) in OAF (F). During acetic fermentation acetic acid, 1,3-butanediol (odorless) and 2,3-butanediol (onion flavor) increased remarkably, sulfur-containing compound such as 2,5-dimethylthiophene having anti-oxidant activities was detected by fermentation.

Review of the Studies on the Qualities in Peanuts (땅콩 품질에 관한 연구현황과 금후의 방향)

  • Lee, Jung-Il;Park, Hee-Woon;Han, Eui-Dong
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.33 no.s01
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    • pp.64-85
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    • 1988
  • Peanut seeds are characterized by high oils and proteins with good quality, and are utilized as an edible oil source and a protein-rich food products. The end products, being peanut butter, salted seed, confections, roasting stock and other by-products are favored in world-wide because of their unique roasted peanut flavor. As with many other foods, interest in the composition and chemistry of peanut is largely a result of thier use as human food. Thus, a more complete knowledge of thier chemical and food quality and flavor properties is desired. Literatures are reviewed mainly focucing on the physicochemical properties and nutritional quality of oil, protein and flavor in peanuts. Chemical properties of protein and oil, and volatile flavor component in peanut seeds are studied extensively in view point of chemical and food nutritional value. But in crop base, the synthesis and genetic studies of the chemicals could not provide valuable informations on the breeding for quality improvement. Some essential amino acids are limiting in peanut seeds and the tocopherols are very important in oil stability and for dietary adequacy ratio in high linoleic acid peanut oil, but it is thought to be quite difficult to improve by breeding technique as their lack information of gene actions. However, the selections of high protein and oil, and some essential amino acids and linoleic acid rich genotypes could be helpful for the quality improving. Research studies are also needed to elucidate the relationships between flavor components and consumer perception of peanut flavor.

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