• Title, Summary, Keyword: flavor determination

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Quality Characteristics of Yanggaeng with Ginseng Paste (인삼 페이스트를 첨가하여 제조한 양갱의 품질 특성)

  • Lee, Yu Ji;Oh, Ye Jin;Kim, Hye Rhee;Hwang, Eun-Sun
    • The Korean Journal of Food And Nutrition
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    • v.30 no.6
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    • pp.1341-1347
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    • 2017
  • The objective of this study was to investigate the quality and sensory characteristics of yanggaeng prepared with different amounts of ginseng paste. Ginseng paste was incorporated with yanggaeng at a range of different levels of 5~15% based on the total weight of water. The pH and total acidity of yanggaeng were 6.35~6.49% and 0.03~0.07%, respectively. The sugar content of yanggaeng in the control was $25.0^{\circ}Brix$ and showed proportional increases up to $25.0{\sim}29.7^{\circ}Brix$ with increasing levels of ginseng paste. In terms of the texture profile analysis, the hardness and adhesiveness of yanggaeng decreased but the cohesiveness, gumminess, and chewiness increased compared to the control and ginseng paste added treatments. In color value determination, the $L^*$ and $a^*$ values decreased but the $b^*$ value increased with increasing levels of ginseng paste. The sensory evaluation indicated that the yanggaeng contained up to 15% ginseng paste and showed similar flavor, taste, texture, and overall acceptance in the control. These results suggest that ginseng paste is an ingredient that can enhance the quality and sensory potential of yanggaeng.

Quality Characteristics and Antioxidant Activities of Cheongpomook Added with Aronia (Aronia melanocarpa) Powder (아로니아 분말을 첨가한 청포묵의 품질특성 및 항산화활성)

  • Hwang, Eun-Sun;Thi, Nhuan Do
    • Korean journal of food and cookery science
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    • v.30 no.2
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    • pp.161-169
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    • 2014
  • The quality characteristics and antioxidant activities of Cheongpomook prepared with different amounts of aronia (Aronia melanocarpa) powder were studied. Freeze-dried aronia powder was incorporated into mung bean starch at different levels (1, 3 and 5% aronia powder based on the total weight of mung bean starch). Moisture content in control group was 89.7% and was not significantly different from the different levels of aronia powder groups. Syneresis, hardness, chewiness and gumminess were increased with higher amounts of aronia powder in Cheongpomook. In chromaticity determination, the L value of the samples decreased but the a and b values increased with increasing the levels of aronia powder in Cheongpomook. The total polyphenols, flavonoids and anthocyanin contents were proportionally increased with increasing the levels of aronia powder added in Cheongpomook. The antioxidant activity measured by DPPH and ABTS radical scavenging activities was significantly higher than control and increased proportionally to the aronia powder concentration. The sensory evaluation indicated that the 5% aronia powder showed the best preference in color, taste, flavor, hardness, and overall acceptance. These results suggest that aronia powder may be useful ingredient in Cheongpomook to improve quality and antioxidant potential.

Determination of the Volatile Flavor Compounds for the Quality Characteristics in Traditional Alcoholic Beverages (전통주의 품질 특성 규명을 위한 향기 성분 분석)

  • Ahn, Yun-Gyong;Song, Yeong-Sun;Shin, Jeoung-Hwa
    • The Korean Journal of Community Living Science
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    • v.23 no.2
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    • pp.199-206
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    • 2012
  • In order to evaluate the aroma compounds in Korean traditional alcoholic beverages, volatile compounds of the commercial wines, Makgeolli were analyzed and quantified using the conventional method. Eight volatile compounds including three kinds of alcohols, two kinds of organic acids and three kinds of ether were extracted by Liquid-Liquid Extraction with Dichloromethane. For the separation and quantification, Gas chromatography coupled with mass spectrometry (GC/MS) was used to analyze these compounds. Also, the separation efficiency of these compounds was performed and compared with GC column. The results of this study were as follows ; Eight kinds of volatile compounds were separated well on the HP-88 column better than on the DB-5MS column. Short chain fatty acids, butyric acid and isovaleric acid were not detected in two brands of makgeolli samples. The higher alcohols were detected in the range of 0.86~225.68 ${\mu}g/mL$ and ethyl esters were detected in the range of 0.86~225.68 ${\mu}g/mL$, respectively. There compounds are known to be associated with sensory and odorant.

Chemical, Textural and Sensorial Attributes of Biltong Produced through Different Manufacturing Processes

  • Engez, Semih;Baskan, Pelin;Ergonul, Bulent
    • Food Science of Animal Resources
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    • v.32 no.3
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    • pp.263-267
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    • 2012
  • Six different types of biltong samples were manufactured from beef which was slowly frozen, quickly frozen or unfrozen. After marinating the samples according to the formulation used, meats were dried at two different temperatures ($28{\pm}1^{\circ}C$ or $42{\pm}1^{\circ}C$) until they lost half of their weights. Chemical, instrumental textural and sensorial analyses were done for determination of the most preferred sample and to compare the attributes of the samples with each other. It was found that, aw values of the samples were among 0.81 and 0.83, whereas water contents were changing among the values 39.64% and 45.37%. There were no significant differences determined among the protein contents of the biltong samples (p>0.05). Fat, ash and salt contents of the samples were among the values 1.32% and 2.07%, 5.30% and 6.06%, 2.68% and 3.30% respectively. Hardness of the samples were found between 34.81 N and 44.13 N and there was no significant difference observed among the hardness values of the biltong samples (p>0.05). As results of the analyses, it can be concluded that the highest flavor, color, tenderness and overall acceptability scores were obtained for the sample QF-LT which was made from quickly frozen beef and was dried at low temperature ($28{\pm}1^{\circ}C$) (p<0.05).

Determination of Volatile Flavor Compounds during Storage of Cereal Added Yogurt using HS-SPME (곡류 첨가 발효유의 저장 중 HS-SPME를 이용한 휘발성 향기성분 정량분석)

  • Lim, Chan-Mook;Jhoo, Jin-Woo;Kim, Gur-Yoo
    • Food Science of Animal Resources
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    • v.33 no.5
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    • pp.646-654
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    • 2013
  • In this study, quantitative analysis of major volatile flavor compounds from yogurt was conducted using headspace-solid phase microextraction (HS-SPME) GC-FID analysis technique, and the changes of volatile aroma compounds during the storage period were evaluated. The yogurt was prepared with the addition of 2% cereals, such as, white rice (WR), brown rice (BR), germinated brown rice (GBR) and saccharified germinated brown rice (SGBR). After fermentation, the products were stored at $5^{\circ}C$for 15 d. The major volatile aroma compounds in yogurt, such as acetaldehyde, acetone, diacetyl and acetoin were able to be extracted using HS-SPME technique efficiently. The regression ($r^2$) value of standard curve prepared with various concentrations of individual flavor chemicals was analyzed over 0.9975, and reproducibility was acceptable to apply quantitative analysis. The analysis of volatile components of control sample during storage showed that the acetaldehyde on 0 d was 10.83 ppm, and that contents were increased to 15.67 ppm after 15 d of storage. However, addition of BR, GBR and SGBR decreased the acetaldehyde contents during storage periods. The acetone content of all treatments during storage was not significantly different. The diacetyl content of all treatments were increased during storage and the addition of SGBR showed the highest amount of diacetyl (0.84 ppm) among treatments on 15 d of storage. The acetoin content of yogurt added with grains was higher than that of control during storage. As a result, the content of volatile aroma compounds in yoghurt during storage period could be analyzed HS-SPME extraction technique effectively, and HS-SPME/GC analysis can be considered for quality control of fermented milk products.

Studies on the Evaluation for the Quality of Food by Sensory Testing -III. The Survey of Consumer Acceptance and Preference for Commercial Milk- (관능검사법(官能檢査法)에 의한 식품(食品)의 품질평가(品質評價)에 관(關)한 연구(硏究) -제(第) 3 보(報) : 시판(市販)우유에 대한 소비자(消費者) 기호조사(嗜好調査) 시험(試驗)-)

  • Chae, Soo-Kyu;Yu, Tai-Jong
    • Korean Journal of Food Science and Technology
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    • v.12 no.3
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    • pp.165-169
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    • 1980
  • Consumer acceptance and preference tests for commercial milk were run with laboratory consumer panel. The results were summarized as follows: 1. According to result of the paired comparison preference test between milk K and each of 4 commercial milk tested a significant difference in the consumer preference was not recognized at 5 percent level 2. According to result of hedonic scale test for commercial milk, a significant difference on both treatment and panel member effect was not recognized at 5 percent level. 3. According to result of food action scale test for commercial milk, the frequency of 'I would drink this every opportunity I had' was the highest as 38 percent. 4. According to the rank test for the determination of the preference for milk flavor on the temperature of sample, the frequency of sampling at $20^{\circ}C$ was the highest. 5. A significant difference on the flavor of milk was recognized among 5 samples of commercial milk by both difference test and profile test as reported in the previous paper (Korean J. Food Sci. Technol. 12(3), 150 and 158(1980)), but not by rank test, preference test and hedonic scale test. This fact suggests that rank test, preference test and hedonic scale test are influenced by the difference on the preference of the panel members and on the basis of quality, etc.

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Descriptive Profile and Liking/Disliking Factors for Aseptic-packaged Rice Porridge (무균포장죽의 묘사적 특성과 소비자 기호 유발 인자 결정)

  • Kwak, Han Sub;Oh, Ye-Jin;Kang, Han-Bit;Kim, Tae Hyoung
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.42 no.11
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    • pp.1878-1885
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    • 2013
  • The purposes of this study are to generate sensory profile, measure consumer acceptance, and determine liking and disliking factors of aseptic-packaged rice porridges (APRP). Five APRPs made by five different rice cultivars were used for this study. Twenty-one attributes were generated by trained panelists. Finally, 16 attributes were determined as descriptive terms for APRP. Each cultivar showed a different descriptive sensory profile. In a consumer acceptance test, there was no statistical difference (P>0.05) in the acceptances of the overall, appearance, taste, texture, viscosity, and rice particle texture among the 5 APRPs. SW52 showed the highest acceptance ratings in the overall, appearance, taste and texture, followed by SR. A total of 52% of consumers showed preference toward SW52 and SR. SW63 showed the lowest ratings and no consumer preference pattern. Consumers were divided into two groups by a cluster analysis; one was the consumers (C1) who liked APRP, and the other was the consumers (C2) who had a neutral stand in general. By correlating the results from descriptive analysis and consumer ratings from C1, liking and disliking factors for consumer acceptance were determined. The disliking factors were bitterness, feeling of surface, stickiness, metallic flavor, roasted aroma, and thickness. The liking factors were old cooked rice aroma/flavor. The disliking factors dominated in the determination of acceptability of APRP. Selecting rice cultivars that had low intensities of disliking factors is the key for APRP development.

Quality Determination of Shrimp(Penaeus japonicus) during Iced and Frozen Storage (보리새우(Penaeus japonicus)의 얼음과 냉동저장시 품질변화 측정)

  • Lee, Young-Chun;Um, Young-Soo
    • Korean Journal of Food Science and Technology
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    • v.27 no.4
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    • pp.520-524
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    • 1995
  • ATP related compounds, ammonia, VBN, pH and sensory quality of shrimps were determined to evaluate quality changes during iced and frozen storage. ATP related compounds were determined by HPLC, ammonia by ammonia ion specific electrode, VBN by micro-diffusion method, pH by pH meter, sensory quality by multiple comparison test with 30 panelists. K value of ice stored shrimps gradually increased to 20% for 8 days, and then increased more rapidly, whereas that of frozen stored shrimps increased slowly for 7 months. Ammonia contents in ice stored shrimps increased slowly for 6 days and then rapidly after 8 days storage, whereas that in frozen stored shrimps increased slowly for 8 months. VBN contents in ice stored shrimps increased slowly for 10 days and then rapidly after 12 days. VBN contents in frozen stored shrimps slightly increased for 6 months. Sensory scores of taste and color of shrimps marked lowered values after 6 days storage in ice, and after 6 and 7 months frozen storage, respectively. Sensory flavor scores of stored shrimps had significant correlations with K value, ammonia, pH and VBN. These results indicated that ammonia contents in stored shrimps, rapidly determined by an ammonia electrode, could be used as a quality index of shrimps.

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Current Achievement and Perspectives of Seed Quality Evaluation in Soybean (콩 품질평가 현황과 전망)

  • 김용호
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.47
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    • pp.95-106
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    • 2002
  • Soybean is one of the most important sources of protein and oil in the world. Recently, emphasis has been laid on the chemical composition of soybean seeds for the processing soybean foods. Improvement of soybean components has been expected to improve food-processing quality for the processed soybean products such as soymilk and various edible ingredients as well as fur the traditional soyfoods. In Korea, soybean breeding research programmes have been focused on the quality of the products derived from soybean with yield stability, and some new modified soybean varieties haying good food-processing quality were developed recently. So the efforts of establishing standard and standardization of products in soybean are important. Three main categories should be considered in view of soybean seed quality; the marketing value such as grain size, shape, and appearance; the eating and processing value such as dehulled ratio, water absorption rate, and benny flavor; the nutritional value such as protein, lipid, and carbohydrate contents. And the new frontiers in research are looking at the functional nutrients in soybeans and how to improve them. In case marketing value, mainly the appearance is evaluated, therefore, each country has an application of standard related to quality. Each determination of standard class, heat-damaged kernels, splits, and soybeans of other colors is made on the basis of the grain when free from foreign materials. But processing value and nutritional value for standardization were not studied in detail till now. In addition, soybean has potential roles in the prevention and treatment of chronic diseases, most notably cancer, osteoporosis, and heart disease. The functional nutrients include a protease inhibitor, phytic acid, saponins, and isoflavones, etc.. It is believed that standardization of soybean quality should perform to overcome the difficulties, relatively high price of domestic soybean products has weakened the competitive power, in the market related to WTO. So, we should focus on further research into the evaluation and establishment of quality-standard in soybean.

Optimization of Maillard Reaction in Model System of Glucosamine and Cysteine Using Response Surface Methodology

  • Arachchi, Shanika Jeewantha Thewarapperuma;Kim, Ye-Joo;Kim, Dae-Wook;Oh, Sang-Chul;Lee, Yang-Bong
    • Preventive Nutrition and Food Science
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    • v.22 no.1
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    • pp.37-44
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    • 2017
  • Sulfur-containing amino acids play important roles in good flavor generation in Maillard reaction of non-enzymatic browning, so aqueous model systems of glucosamine and cysteine were studied to investigate the effects of reaction temperature, initial pH, reaction time, and concentration ratio of glucosamine and cysteine. Response surface methodology was applied to optimize the independent reaction parameters of cysteine and glucosamine in Maillard reaction. Box-Behnken factorial design was used with 30 runs of 16 factorial levels, 8 axial levels and 6 central levels. The degree of Maillard reaction was determined by reading absorption at 425 nm in a spectrophotometer and Hunter's L, a, and b values. ${\Delta}E$ was consequently set as the fifth response factor. In the statistical analyses, determination coefficients ($R^2$) for their absorbance, Hunter's L, a, b values, and ${\Delta}E$ were 0.94, 0.79, 0.73, 0.96, and 0.79, respectively, showing that the absorbance and Hunter's b value were good dependent variables for this model system. The optimum processing parameters were determined to yield glucosamine-cysteine Maillard reaction product with higher absorbance and higher colour change. The optimum estimated absorbance was achieved at the condition of initial pH 8.0, $111^{\circ}C$ reaction temperature, 2.47 h reaction time, and 1.30 concentration ratio. The optimum condition for colour change measured by Hunter's b value was 2.41 h reaction time, $114^{\circ}C$ reaction temperature, initial pH 8.3, and 1.26 concentration ratio. These results can provide the basic information for Maillard reaction of aqueous model system between glucosamine and cysteine.