• Title/Summary/Keyword: sour taste

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A Survey of Preference for Commercial Makgeolli among Chinese Students in Korea (국내 시판 막걸리에 대한 중국인 유학생의 기호도 조사)

  • Jeon, Ki-Suk;Park, Shin-In
    • Culinary science and hospitality research
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    • v.20 no.4
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    • pp.115-126
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    • 2014
  • The purpose of this study was to offer primary information for development of Makgeolli adapted to the tastes of Chinese and marketing strategies for promoting consumption of Makgeolli in the Chinese market. This study was intended to investigate the Makgeolli drinking behavior through a survey and the sensory properties and preference of fresh and sterilized Makgeolli through sensory evaluation focusing on the Chinese students in Korea, becoming potential consumers of Makgeolli. The survey was conducted from October 9th to October 30th, 2013, and then 117 copies were adopted for the analyses. The results are as follows. 71.8% of the subjects liked Makgeolli, 56.4% drank 5-6 times a week, and 25.7% drank more than 2 bottles at a time. 61.5% of the subjects had purchasing experience. The routes of collecting information about Makgeolli were acquaintances(66.7%) and media sources(28.2%). In the sensory evaluation, sterilized Makgeolli(BS) that has a fresh odor, sweet and sour taste, cooling sensation, and good aftertaste got the best score in the overall acceptability, and fresh Makgeolli(KD) that has a strong nuruk odor, turbidity, bitter taste, and heavy mouthfeel got the lowest score in the overall acceptability. These results show that sweet, fresh, and refreshing Makgeolli suits Chinese's taste and word of mouth marketing through the expansion of tasting events would promote Makgeolli consumption in the Chinese market.

Comparative Analysis on Preference for Korean Traditional Foods in Foreigners and Koreans (국내 체류 외국인 및 내국인의 전통향토음식에 대한 기호도 비교 분석)

  • Cha, Sung-Mi;Chung, La-Na;Chung, Seo-Jin;Kim, Kwang-Ok;Lee, Sae-Rom;Kim, Haeng-Ran;Han, Gwi-Jung;Lee, Jin-Young
    • Journal of the Korean Society of Food Culture
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    • v.27 no.3
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    • pp.294-303
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    • 2012
  • This study was conducted to compare the preference and satisfaction for Korean traditional foods (Jeonju Bibimbap, Daetongbap, Jeonbokjuk, Jorangiddockguk, Hobakbumbuk, Darkgalbee, Eonyang Bulgogi, Moyackgwa, Insam Jeonggwa, Maejackgwa) in foreigners and Koreans. In this study, 27 foreign and 31 Korean university students were surveyed. Statistical analysis and Mann-Whitney U test were performed using the SPSS statistical package (17.0). The major findings were as follows: 1) Foreigners had higher experience of eating Darkgalbee (84.6%), Jeonju Bibimbap (80.8%), Daetongbap (53.8%), and Jeonbokjuk (53.8%) among Korean traditional foods, whereas their eating experience of Insam Jeonggwa (3.8%), Maejackgwa (11.5%), Moyackgwa (15.4%) and Jorangiddockguk (23.1%) was lower. 2) Foreigners and Koreans both liked sweet taste, but disliked sour taste, bitter taste, garlic flavor, sesame flavor, and soy sauce flavor among the sensory characteristics of Korean traditional foods. 3) Foreigners scored their overall satisfaction of Korean traditional foods in the order of Jeonju Bibimbap ($7.70{\pm}0.95$), Eonyang Bulgogi ($7.62{\pm}2.10$), Daetongbap ($7.59{\pm}1.60$), Darkgalbee ($7.20{\pm}1.56$), and Jeonbokjuk ($6.67{\pm}1.64$), whereas Koreans rated higher scores for Eonyang Bulgogi ($8.28{\pm}1.19$), Darkgalbee ($8.20{\pm}1.00$), Jeonju Bibimbap ($7.73{\pm}1.08$), Jeonbokjuk ($7.69{\pm}1.44$), and Moyackgwa ($7.43{\pm}1.52$).

Effects of Wasabi (Wasabia japonica Matsum) on the Microbiological and Sensory Characteristics of Dongchimi (고추냉이 첨가가 동치미의 미생물학적 및 관능적 특성에 미치는 영향)

  • Park, Jung-Eun;Jang, Myung-Sook
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.35 no.8
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    • pp.1057-1063
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    • 2006
  • The Dongchimi added with Wasabi (Wasabia japonica Matsum) for the improvement of quality was scientifically explored by reviewing the optimum level and its effect on the microbiological and sensory characteristics of product fermentation. The final weight percentage of Wasabi in Dongchimi was adjusted to 0, 3, 5, 7 and 9%, per radish, respectively. Microbiological and sensory characteristics were determined during fermentation at $10^{\circ}C$ for 55 days. The viable cell counts of total and lactic acid bacteria had increased to their maximum values during fermentation until they began to drop at the later stage. Here, the 7% treatment showed a distinctive low and high numbers of total cells and lactic acid bacteria, respectively, during the later stage of fermentation. As for the sensory evaluation results of the fermented Donchimi with Wasabi, the 7% treatment was most favored for the color, the smell, the sour taste, the hot taste, the carbonated taste, the texture, and the overall acceptability of the products. The optimum levels of Wasabi in Dongchimi were estimated between 5 and 7% per added radish weight, and the 7% level was more preferred when the fermentation-retarding effect of the product was considered.

Formulation and Quality Characteristics of Noni Beverages Mixed with Red Ginseng, Rubus Coreanus and Pomegranate Extracts (홍삼, 복분자, 석류를 첨가한 노니 혼합음료의 개발과 품질특성)

  • Kim, Eun-Mi
    • Culinary science and hospitality research
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    • v.17 no.1
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    • pp.259-269
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    • 2011
  • The purpose of this study was to investigate the physicochemical and sensory characteristics of Noni beverages added with 10% of water(Noni 90), 1% of red ginseng(NR), 4% of rubus coreanus extract(NR), 5% of pomegranate extract(NP), and 4% of rubus coreanus extract and 5% of pomegranate extract(NPR). Calories, protein and total fiber contents were increased in NR, NP and NPR. Total sugar was significantly increased in NG and NPR. Fat, cholesterol and saturated fatty acid were not detected. Ca and Na contents were increased in NG while Fe content was increased in NG, NR, and NPR pH was significantly increased in NG and NP. Sugar degree was significantly increased in NP and NPR. L and b values were decreased in NG, NP, and NR and a value was increased in NG and NR General bacteria count was 0/mL, and Coliform, E. Coli and 0157:H7 were gram(-) in all beverages. In sensory evaluation, color was increased in NPR while taste and overall quality were increased in NG, NR and NP. Sour taste, sweet taste, and flavor were not different between Noni and the mixed beverages. Texture was significantly increased in NP and NPR. Therefore, mixed Noni beverages added with red ginseng, rubus coreanus extract, and pomegranate extract were better than Noni beverage.

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Effect of Ultraviolet-C and Organic Acid Treatment on Fungi Isolated from High Carbohydrate Confectionery (고당류 제과에서 분리한 진균에 대한 UV-C와 유기산 처리 효과)

  • Lee, Ji-Eun;Xu, Xiaotong;Jeong, So-Mi;Kang, Woo-Sin;Ryu, Si-Hyeong;Kim, Ye-Seung;Ahn, Dong-Hyun
    • Journal of Life Science
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    • v.31 no.5
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    • pp.481-487
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    • 2021
  • The purpose of this study was to identify fungi that degrade product value during the storage and distribution of confectionery products, and to investigate the antifungal effect of organic acid and UV-C treatments on high carbohydrate products. Fungi isolated from spoiled high carbohydrate confectionery were identified as Wallemia sp., Aspergillus sp-1 and Aspergillus sp-2 depending on homologies with ITS1 and ITS4 sequences. The isolated fungi were assayed for antifungal activity by treatment with acetic acid, citric acid, lactic acid or maleic acid. As a result, it was confirmed that the growth of Wallemia sp. and Aspergillus sp-2 was suppressed by treatment with 0.2 M and 0.35 M acetic acid, respectively. In addition, as a result of confirming the antifungal effect according to the UV-C irradiation time, the growth inhibitory effects of Wallemia sp. and Aspergillus sp-2 were shown in irradiation for 30 min and the growth inhibitory effect of Aspergillus sp-1 was shown in irradiation for 40 min. The result of the sensory evaluation of the untreated and 0.35 M acetic acid-treated high carbohydrate confectionery, there were not significant changes in taste, color, abnormal taste, hardness and texture, but there were significant differences in sour taste and smell. As a result of the above study, the effect of inhibiting fungi growth on the product by treatment with organic acid and UV-C irradiation was confirmed, and it is expected to be used in confectionery that were concerned about the occurrence of fungi in the distribution process.

The Influence of Food Habits on Body Stature of Children (어린이의 식습관(食習慣)이 체위(體位)에 미치는 영향(影響)에 관한 연구(硏究))

  • Lee, Mi-Suk;Mo, Su-Mi
    • Journal of Nutrition and Health
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    • v.9 no.1
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    • pp.7-15
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    • 1976
  • The Purpose of this study was to determine every possible correlation between food habits and body statures of primary school children, aged ten years old. This study was conducted from July to October of 1975. In July, prepared questionaires concerning life style, anthropometry, food preference, and food behavior were distributed through school teachers to 425 children; 219 boys and 206 girls, in the 5th grade of three elementary schools in the city of Seoul. Then, in October, when subjects had been classified into underweight/obese by statistical analysis, mothers of obese or underweight children were interviewed by the authors to determine weaning history, daily food consumption of their children, and opinions of various snacks for children. Analysis of results in terms of correlation coefficient, chisquare test and percentage calculations, are as follows: 1. Physical growth and development Boys Girls Height (cm) $134.8{\pm}5.74\;134.4{\pm}5.97$ Weight (kg) $30.0{\pm}4.27\;29.5{\pm}5.16$ Chestgirth (cm) $64.1{\pm}3.59\;63.3{\pm}3.81$ Arm circumference (cm) $18.3{\pm}1.61\;18.2{\pm}1.70$ Triceps skinfold thickness (mm) $10.9{\pm}5.13\;12.7{\pm}4.86$ Various indices of nutrition such as relative weight, relative chestgirth, $R{\ddot{o}}hrer's$ index, Kaup index, Vervaeck index were determined. 2. Food habits 1) Food $preference{\cdots}{\cdots}A$ varying number of foods were selected from 60 items were accepted. It was found that the food which children liked best was fruit and snacks were popular one. Lowest ranking among LIKED foods were from strongly flavored vegetables and organ meat. In general, girls had more food dislikes than did boys. Selected as liked foods were fruits, rice noodle soup, biscuits, and peanuts. Disliked foods were liver, green onions, onions, green pepper, mushrooms, oysters, shellfish, and pork. Items which children never ate before were liver, mushrooms, fish cake, boiled rice mixed with sorghum, mayonnaise, and fresh water firsh. Reasons which children gave for dislike were undesirable flavor and odor. 2) Food $behavior{\cdots}{\cdots}It$ was found that boys liked sweet and salty flavors more than did the girls who more often liked sour flavor. The majority of children enjoyed evening meals more than lunch and breakfast. A number of children skipped breakfast because of lack of appetite or lack of time before going to school. Snacks were the most popular food, especially among girls. Their snacking habits were formed by the encouragement of the mother, and the relieve boredom. Educational backgrounds of mothers and family economical levels of children were remarkable correlated with mothers' attitudes toward feeding of children. There were several interesting findings relating body stature to some other responses; such as that the obese child has a small number of brothers, higher birth order, higher educated mothers and higher family cultural background. It was also discovered that food perference, except for fat and oil group foods was not related to body stature. Sweet taste was liked best and pepperly taste was mostly disliked. Sour taste was popular in the group of underweight. Underweight children were more finicky, disliked snacking, and didn't get much attention from their mothers. 3) Correlation between body stature and nutrition during their infancy. The majority of children, both from obese and underweight, were breast fed as infant. Twenty five per cent of obese children and 17.4 per cent of underwight children started weaning at $1{\sim}6$ months old. The most popular supplemental food of weaning was cereal gruel for the obese group, while boiled white rice and cereal gruel were most common for the underweight group. Highly significant relationships were found between stature of parents and their children. In the obese group 47.8 per cent of fathers and 45.9 per cent of mothers were overweight; however, none of the fathers and only one mother was found to be underweight. In daily food consumption patterns, meals consisting of bread or noodle were popular in the obese group but disliked by the underweight group. The study found clear contrast in that the obese group liked meat and fish while the underweight group liked fruits and vegetables, especially kimchee. The obese children desired to eat cereal foods, milk and milk products, and fat foods while the underweight group desired to eat fruits and vegetables. Frequency of snacks per day was much greater in the obese group. Foods which mothers believed to be good for the health were carrots, cucumbers, fruits, milk, potatoes, sweet potatoes, and breads, while sweet foods such as candies, drinks. chocolate were considered not good for the teeth. Watching television was not significantly related to statures of children. Most significant relationships were found beween frequencies of family guest meals/and eating-out, and children's statures. Nutritional problems which have been considered for the malnourished children in addition to those of children who have a tendency toward obesity, must be taken into consideration in the development of proper nutrition education through the channels of regular school teaching and teaching by parents in the homes. Korean standards of anthropometric measurements for children should be revised, current measurements show much higher figures than present Korean standards.

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Microbial Diversity of Commercial Makgeolli and Its Influence on the Organoleptic Characteristics of Korean Rice Sourdough, Jeung-Pyun

  • Park, Jaehyung;Seo, Ji Sun;Kim, Seul-Ah;Shin, So-Yeon;Park, Jong-Hyun;Han, Nam Soo
    • Journal of Microbiology and Biotechnology
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    • v.27 no.10
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    • pp.1736-1743
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    • 2017
  • Sourdough is made by fermentation of dough by lactic acid bacteria (LAB) and yeast to improve bread properties like volume, flavor, and texture. A Korean traditional sourdough was made by fermenting rice flour with rice wine (makgeolli) and used to make sponge-like bread (jeung-pyun). The aim of this study was to investigate the microbial diversity of makgeolli products and their influence on the organoleptic quality of jeung-pyun. Three commercial makgeolli were tested for jeung-pyun production, with each product exhibiting varied dough swelling rates and organoleptic qualities, and among them, J-product was ranked highest in texture and taste. Microbial analysis of the three makgeolli also showed a big difference in their population and diversity. J-product had the highest LAB and yeast counts, and the predominant species were Lactobacillus casei, Lactobacillus brevis, Leuconostoc pseudomenteroides, and Saccharomyces cerevisiae. Using J-product, sourdough was fermented at $25^{\circ}C$, $30^{\circ}C$, and $35^{\circ}C$, and the microbial growth in and textural properties of jeung-pyun were examined by instrumental and sensory tests. At high temperature ($35^{\circ}C$), the rates of dough swelling and acidification were fast due to rapid microbial growth mainly caused by LAB, resulting in a short leavening time and soft and sour jeung-pyun. Sensory tests showed consumer preference for the soft and mild-sour jeung-pyun. This study shows that LAB in makgeolli play key roles in production of jeung-pyun, influencing the textural and sensory properties. For the production of high-quality jeung-pyun, development of LAB starters with high gas productivity and low acidity and establishment of an optimal fermentation procedure for rice dough are necessary.

EFFECT OF NERVE GROWTH FACTOR GENE INJECTION ON THE NERVE REGENERATION IN RAT LINGUAL NERVE CRUSH-INJURY MODEL (백서 설신경 압박손상모델에서 신경성장인자 유전자 주입이 신경재생에 미치는 영향)

  • Gao, En-Feng;Chung, Hun-Jong;Ahn, Kang-Min;Kim, Soung-Min;Kim, Yun-Hee;Jahng, Jeong-Won;Lee, Jong-Ho
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.28 no.5
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    • pp.375-395
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    • 2006
  • Purpose: Lingual nerve (LN) damage may be caused by either tumor resection or injury such as wisdom tooth extraction, Although autologous nerve graft is sometimes used to repair the damaged nerve, it has the disadvantage of necessity of another operation for nerve harvesting. Moreover, the results of nerve grafting is not satisfactory. The nerve growth factor (NGF) is well-known to play a critical role in peripheral nerve regeneration and its local delivery to the injured nerve has been continuously tried to enhance nerve regeneration. However, its application has limitations like repeated administration due to short half life of 30 minutes and an in vivo delivery model must allow for direct and local delivery. The aim of this study was to construct a well-functioning $rhNGF-{\beta}$ adenovirus for the ultimate development of improved method to promote peripheral nerve regeneration with enhanced and extended secretion of hNGF from the injured nerve by injecting $rhNGF-{\beta}$ gene directly into crush-injured LN in rat model. Materials and Methods: $hNGF-{\beta}$ gene was prepared from fetal brain cDNA library and cloned into E1/E3 deleted adenoviral vector which contains green fluorescence protein (GFP) gene as a reporter. After large scale production and purification of $rhNGF-{\beta}$ adenovirus, transfection efficiency and its expression at various cells (primary cultured Schwann cells, HEK293 cells, Schwann cell lines, NIH3T3 and CRH cells) were evaluated by fluorescent microscopy, RT-PCR, ELISA, immunocytochemistry. Furthermore, the function of rhNGF-beta, which was secreted from various cells infected with $rhNGF-{\beta}$ adenovirus, was evaluated using neuritogenesis of PC-12 cells. For in vivo evaluation of efficacy of $rhNGF-{\beta}$ adenovirus, the LNs of 8-week old rats were exposed and crush-injured with a small hemostat for 10 seconds. After the injury, $rhNGF-{\beta}$ adenovirus($2{\mu}l,\;1.5{\times}10^{11}pfu$) or saline was administered into the crushed site in the experimental (n=24) and the control group (n=24), respectively. Sham operation of another group of rats (n=9) was performed without administration of either saline or adenovirus. The taste recovery and the change of fungiform papilla were studied at 1, 2, 3 and 4 weeks. Each of the 6 animals was tested with different solutions (0.1M NaCl, 0.1M sucrose, 0.01M QHCl, or 0.01M HCl) by two-bottle test paradigm and the number of papilla was counted using SEM picture of tongue dorsum. LN was explored at the same interval as taste study and evaluated electro-physiologically (peak voltage and nerve conduction velocity) and histomorphometrically (axon count, myelin thickness). Results: The recombinant adenovirus vector carrying $rhNGF-{\beta}$ was constructed and confirmed by restriction endonuclease analysis and DNA sequence analysis. GFP expression was observed in 90% of $rhNGF-{\beta}$ adenovirus infected cells compared with uninfected cells. Total mRNA isolated from $rhNGF-{\beta}$ adenovirus infected cells showed strong RT-PCR band, however uninfected or LacZ recombinant adenovirus infected cells did not. NGF quantification by ELISA showed a maximal release of $18865.4{\pm}310.9pg/ml$ NGF at the 4th day and stably continued till 14 days by $rhNGF-{\beta}$ adenovirus infected Schwann cells. PC-12 cells exposed to media with $rhNGF-{\beta}$ adenovirus infected Schwann cell revealed at the same level of neurite-extension as the commercial NGF did. $rhNGF-{\beta}$ adenovirus injected experimental groups in comparison to the control group exhibited different taste preference ratio. Salty, sweet and sour taste preference ratio were significantly different after 2 weeks from the beginning of the experiment, which were similar to the sham group, but not to the control group.

Studies on Improvement of Quality Wine of "Vitis amurensis RUPRECHT" ("개량머루" 과실주의 품질향상에 관한 연구)

  • Lee, B.Y.;Lee, Y.C.;Jung, H.W.;Lim, J.W.
    • Journal of Practical Agriculture & Fisheries Research
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    • v.9 no.1
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    • pp.47-58
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    • 2007
  • New Wild Grape berry weighs approximately 3.7g, which is one fourth of the weight of the general grape wine (12.2g). The pH of New Wild Grape wine is around 3.34, which is lower by 0.3 than that (3.62) of general grape wine. It contains higher organic acids, so it has stronger sour taste. The sugar content of New Wild Grape is 17° Brix, which is higher than that (15° Brix) of general grape wine. The color of New Wild Grape is blackish, owing to the lower lightness, redness, and yellowness compared with those of general grape wine. Depending on the mixing with or without oak tree, there is little difference in the pH, organic acid, reducing sugar, and amount of alcohol after ripening for 1 year. In taste, New Wild Grape wine mixing with oak tree is evaluated better than that of the wine without oak tree. Especially, in the case of the wine mixing with oak tree's sawdust, the quality in color, taste, and smell became improved. After fermentation, the pH of New Wild Grape Wine ripened with oak tree charcoal increased from 3.82 to 3.86, as it gets more oak tree charcoal, and the organic acid decreased from 0.91㎖ to 0.86㎖. However, there is no difference in alcohol amount. Lightness in color tended to be reduced, whereas redness tended to be increased. Adding 3% of oak tree charcoal made the taste and smell improved. When fermenting New Wild Grape Wine with mixing 1% of oak tree's sawdust or 3% of oak tree charcoal, there is little difference in the pH and the organic acid, whereas there is a little difference in those of New Wild Grape Wine without addition of oak tree charcoal. As the addition of oak tree charcoal increased, the lightness and redness became higher. When fermenting New Wild Grape Wine with mixing 1% of oak tree's sawdust or 3% of oak tree charcoal in oak tree barre, the taste became improved.

Effect of Fructoolingosaccharide and Chlorella Powder on Kimchi Fermentation (프락토올리고당과 클로렐라가 김치 숙성에 미치는 영향)

  • 박민경;인만진;정영철
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.31 no.5
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    • pp.760-764
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    • 2002
  • Effects of fructooligosaccharide (1%, w/w) and chlorella powder (0.01% and 0.02%, w/w) on kimchi fermentation were studied. The values of pH and total acidity of kimchi containing fructooligosaccharide or chlorella powder were changed slowly compared to those for the kimchi sample containing 1% sugar during fermentation at 4$^{\circ}C$. Growth of lactic acid bacteria was also inhibited by addition of fructooligosaccharide or chlorella powder. Futhermore, addition of 1% fructooligosaccharide and 0.02% chlorella powder showed synergic inhibitory effects against decrease of pH, increase of acidity and lactic acid bacteria growth. Color values of L, a and b were higher in kimhi with fructooligosaccharide at early stage of fermentation. In sensory evaluation including color, sour taste, crispness and overall quality, kimchi containing both 1% fructooligosaccharide and 0.02% chlorella powder.