• Title/Summary/Keyword: sourness

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Sensory Quality Attributes of Takju and Their Changes During Pasteurization (탁주의 관능적 품질요소와 이들의 열처리에 의한 변화)

  • Lee, Cherl-Ho;Lee, Hyun-Duck;Kim, Ji-Yong;Kim, Ki-Myung
    • Journal of the Korean Society of Food Culture
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    • v.4 no.4
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    • pp.405-410
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    • 1989
  • The sensory quality describing terms of Takju were surveyed by questionair and classified according to the sensory characteristics. The effects of thermal treatment for the pasteurization of Takju on the sensory quality were tested and statistically evaluated. The important sensory quality attributes of Takju were white, gray, and yellow for color, acidic and yeasty for smell, sour, astringent, bitter and sweet for taste and gritty, viscous and carbonated for mouthfeel. The organoleptic properties of grayness, yeasty and cooked smell, astringent and bitter taste and thickness increased, while sourness, sweetness, yellowness, grittiness and carbonated feel decreased by the pasteurization treatments, heating $82^{\circ}C$, $93^{\circ}C$ or $135^{\circ}C$ for 9 seconds. These changes coincided with the overall reductions in the preference scores of pasteurized Takju. The degree of sensory quality deterioration appeared to be affected to some extent by the heating temperature.

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Development of Pretreatment and Mixed Culture Processes for Plant Originated Lactic Acid to Produce a Functional Lactic acid Beverage (대두 전처리 공정 및 식물 유래 유산균 혼합 배양에 의한 기능성 유산균 음료 생산기술 개발)

  • Cho, Eun-Kyung;Cho, Hyung-Yong;Kim, Byeong-Cheol;Shin, Hae-Hun;Cho, Seok-Cheol;Kook, Moo-Chang;Pyun, Yu-Ryang
    • The Korean Journal of Food And Nutrition
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    • v.24 no.1
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    • pp.117-123
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    • 2011
  • This study was conducted to establish process conditions for plant-originated lactic acid production using a mixed culture of plant originated lactic acid bacteria, Lactobacillus sakei B2-16, and Lactobacillus plantarum P23, which were isolated from kimchi, and Bacillus subtilis, which was TP6 isolated from Denjang. Soybean medium was pretreated for 10 minutes at $110^{\circ}C$ and hydrolyzed with 0.2%(w/v) cellulase at $55\sim60^{\circ}C$ for at least 2 hrs. The quality of the final fermentation product was influenced by the inoculation ratio of the Lactobacillus sakei B2-16, Lactobacillus plantarum P23, and Bacillus subtilis TP6. The optimum microorganism inoculation ratio was 1:0.7:0.3, Lactobacillus sakei B2-16: Lactobacillus plantarum P23: Bacillus subtilis TP6, respectively. The sensory characteristics of the product were a refreshing sourness and a soft flavor.

Quality Characteristics of Mixed Polysaccharide Gels with Various Kiwifruit Contents (키위 첨가량에 따른 다당류 혼합겔의 품질 특성)

  • 윤혜신;오명숙
    • Korean journal of food and cookery science
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    • v.19 no.4
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    • pp.511-520
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    • 2003
  • This study was carried out to determine the effects of various contents of kiwifruit contents on the quality characteristics of mixed polysaccharide gels made from $\kappa$-carrageenan and locust bean gum. The color value, gelling temperature, melting temperature, break down rate, syneresis, rupture properties, TPA properties and sensory properties of mixed polysaccharide gels with various contents of kiwifruit contents were measured. As the kiwifruit contents was increased, the lightness (L), yellowness (b) and greenness (-a) of the mixed polysaccharide gels increased. There were no differences in the color values of gels during storage. As the kiwifruit content was increased, the gelling and melting temperatures of the mixed polysaccharide gels also increased. The mixed polysaccharide gels with high kiwifruit contents were difficult to melt, and it seemed that the addition of kiwifruit to the mixed polysaccharide gels could improve the thennal stability of the gels. The syneresis of the gel increased with increasing storage time, whereas the addition of kiwifruit to the gel resulted in suppression of syneresis. With regard to the rupture properties, stress, energy and strain, they were all decreased with increasing kiwifruit contents. The TPA properties, adhesiveness, hardness and chewiness increased and cohesiveness decreased with increasing kiwifruit contents. The results showed that the gel became tough and adhesive, and could be easily broken under small deformation, with increasing kiwifruit contents. The sensory evaluation showed that the green color, aroma, sweetness and sourness increased with increasing kiwifruit contents. The texture, adhesiveness, springiness and cohesiveness decreased, and brittleness and hardness increased, with increasing kiwifruit contents. The overall acceptability of the gel with 30% kiwifruit content was the highest. Thus, mixed polysaccharide gels made from kiwifruits could be useful, as the addition of kiwifruit to a mixed polysaccharide gel results in a good aroma, taste and stability, despite a lowering of the textural properties.

Effect of Slander Glasswort Extract Yogurt on Quality during Storage (함초 추출물 첨가가 요구르트 저장 중의 품질 특성에 미치는 영향)

  • Cho, Young-Sim;Kim, Soon-Im;Han, Young-Sil
    • Korean journal of food and cookery science
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    • v.24 no.2
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    • pp.212-221
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    • 2008
  • This study was performed in an effort to create a functional and stable yogurt product containing slander glasswort extract. The extract was added to milk at concentrations of 0.25, 0.5, and 1.0% (w/v), which was then fermented with lactic acid bacteria (Lactobacillus bulgaricus and Streptococcus thermophilus) at $42^{\circ}C$ for 6 hr. During a period of 15 days of storage, the quality characteristics of the yogurt samples were evaluated in terms of acid production (pH and titratable acidity), levels of lactic acid bacteria, color values, viscosity, and sensory characteristics. There were no significant differences in pH during the storage period; however, the control yogurt presented the highest pH value. The 1.0% slander glasswort yogurt had the highest titratable acidity; but again, there were no significant differences among the yogurts. The 1.0% slander glasswort yogurt also had the highest level of lactic acid bacteria, and both the control and slander glasswort-containing yogurts had increasing levels of lactic acid bacteria over the storage period. The 1.0% slander glasswort yogurt had the lowest L-value and highest a- and b-values. And the slander glasswort yogurts presented lower viscosity values than the control. In sensory evaluations, the 0.25% slander glasswort yogurt scored higher than the other groups for color, flavor, viscosity, sweetness, sourness, and overall palatability. The final sensory results indicated that the 0.25% slander glasswort yogurt was superior.

Quality Characteristics and Antioxidant Properties of Omija-pyun (Schisandra chinensis Jelly) added with Stevia Leaf Powder (스테비아 잎 분말 첨가 오미자편의 품질 특성 및 항산화 특성)

  • Park, Suk-Hyun;Sim, Ki Hyeon
    • The Korean Journal of Food And Nutrition
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    • v.30 no.4
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    • pp.653-664
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    • 2017
  • This study added stevia leaf powder at ratios of 0.5, 1.0, 1.5, and 2.0 percent to Omija-pyun (Schisandra chinensis Jelly) as a natural low-calorie sweetener instead of sugar which is added to Omija-pyun in considerable amounts to evaluate quality characteristics and antioxidant activities compared to the control group with the addition of sugar. Moisture content of Omija-pyun expanded by increasing the measurement of stevia leaf powder (p<0.001), pH (p<0.01) and sugar content (p<0.001) decreased. L-values and b-values revealed a tendency to increase by adding more stevia leaf powder, but a-value revealed a tendency to decrease (p<0.001). Hardness (p<0.001) and chewiness (p<0.05) decreased by adding more stevia leaf powder. Based on the consumer preference evaluation, Omija-pyun with the addition of 0.5 percent stevia leaf powder was the most preferable in terms of color and flavor (p<0.001). The control group and Omija-pyun with the addition of 0.5 percent stevia leaf powder was the most preferable in terms of taste and texture (p<0.001). There were significant differences in the organoleptic properties except hardness between the samples by quantitative descriptive analysis. The control group revealed the highest preference in terms of redness and transparency, and redness and transparency tended to decrease by adding more stevia leaf powder (p<0.001). Organoleptic properties on bitterness and sourness were enhanced by adding more stevia leaf powder in the principal component analysis (PCA). Regarding antioxidant properties, total phenol compounds and flavonoid contents of Omija-pyun increased by adding more stevia leaf powder, and DPPH radical scavenging capacity also increased (p<0.001). Based on results, it is preferable to serve Omija-pyun with the addition of 1.0 percent stevia leaf powder instead of sugar within the context of quality and antioxidant activity.

Study on the Different Effect of Same Taste of Herb;mainly based on "Chuhaisanghannon(注解傷寒論)" by Seongmugi(成無己) (본초(本草)의 동미이용(同味異用)에 대(對)한 연구(硏究);성무기(成無己)의 "주해상한론(注解傷寒論)"을 위주로)

  • Jo, Hak-Jun;Kim, Ho-Hyun;Leem, Kang-Hyun
    • Journal of Korean Medical classics
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    • v.21 no.1
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    • pp.93-110
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    • 2008
  • We got some conclusion about the function of five tastes from individual peculiarity, from "Sanghanjapbyeongnon(傷寒雜病論)" by Sungmoogi, like below. 1. Five tastes[五味] have their general function, but herbs of one tastes, each has special function, we can define it as individual peculiarity 2. For example, sour taste generally make it convergent, astringent. The sourness of Paeoniae Radix Alba[芍藥] can convergent resin, and be help nutrition, but same of Phaseoli Semen[赤小豆] can make him vomit. 3. Bitterness generally make it down, dry, and solid. Scutellariae Radix[黃芩], Coptidis Rhizoma[黃連] can bring down fever of heart and spleen, but Rhei Radix Et Rhizoma[大黃] eliminates solid illness. 4. Sweetness make it strong, harmonic, relax. Sweetness of Glycyrrhizae Radix[甘草] flows into spleen, make it relax the part of beneath heart. Puerariae Radix[葛根] can make scatter the cold on skin. 5. General nature of hot taste is diffusion, sheen, rampancy. Cinnam omi Ramulus[桂技] eliminates the Pung(風) in Wigi(衛氣). same Zingiberis Rhi zoma[乾薑] make inner cold scattered, and warm stomach. 6. Salty make Gi(氣) down, and slacken solidity, salty Natrii Sulfas[芒硝]removes heat of body. But Alismatis Rhizoma[澤瀉] removes needless water. 7. To know peculiarity of each herb, not only one taste but other combined tastes, and areas medical, agricultural, biologic, etc.

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Ginseng-Whey Beverage Production and Sensory Properties (인삼 유청음료의 제조 및 관능적 특성)

  • 기해진;홍윤호
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.22 no.2
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    • pp.202-207
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    • 1993
  • Ginseng-whey beverages were prepared with rennet whey, ginseng extract, sweetener, honey and Japanese apricot, inoculated with different strains of lactic acid bacteria and unfermented partly. The samples were stored at 4$^{\circ}C$ or 30$\pm$1$^{\circ}C$ and the sensory evaluations were carried out at 1st, 3rd and 5th week. As a result of sensory test, unfermented ginseng-whey beverage (A) with sweetener and honey (storage at cold temp.) in overall eating quality obtained the best score (8.64~8.86) due to stronger sweetness and weaker sourness, bitterness, astringent taste and aftertaste. The fermented ginseng-whey beverage (C) which was stored at 4$^{\circ}C$ with inoculation of Lac. acidophilus and Lac. delbrueckii sub-sp. bulgaricus and the unfermented samples stored at room temperature with sweetener, honey and Japanese apricot received a good evaluation. But, the fermented beverages (E, F) stored at room temperature obtained the lowest score (2.92~3.58).

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Quality Characteristics of Low-sodium Oiji (Traditional Korean Cucumber Pickles) based on Addition of Glasswort Powder (함초 분말 첨가에 따른 저나트륨 오이지의 품질특성)

  • Kim, Gumjung;Yang, Jiwon;Lee, Kyunghee
    • Journal of the Korean Society of Food Culture
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    • v.34 no.5
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    • pp.620-628
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    • 2019
  • To investigate Oiji (traditional Korean cucumber pickles) with reduced sodium content based on the use of saline foods as a salt substitute, Oiji was prepared using glasswort powder (Salicornia herbacea L.), and its physicochemical properties and sensory evaluation were examined. The moisture content of Oiji was shown to be higher in those to which glasswort powder had been added compared to the control without addition of glasswort powder, and Oiji with 40% glasswort powder substitute showed the highest pH and lowest acidity, resulting in slow progression of fermentation. The salinity of Oiji among those containing glasswort powder substitute was significantly higher with increasing level of glasswort powder. The sodium content of Oiji was significantly reduced as addition of glasswort powder increased. The L value of Oiji decreased with increased addition of glasswort powder, whereas the a value was highest in the control. The hardness of Oiji was higher in the control than in Oiji containing glasswort powder. Taste acceptance was highest for Oiji with 20% glasswort powder substitute, whereas acceptance of appearance was higher for Oiji with 10% glasswort powder substitute. Flavor and texture acceptance was higher for the control. In the attribute difference test, significant differences were found in brownness, off-flavor, salty taste, and sourness. Based on the findings, 10-20% substitution of salt with glasswort powder did not significantly lower overall acceptance compared to the control while salinity of Oiji was maintained. Therefore, the potential production of low-sodium Oiji has been verified.

Incorporation of Selected Strains of Pediococcus spp. on Quality Characteristics of Dry Fermented Sausage during Fermentation and Ripening

  • Seleshe, Semeneh;Ameer, Ammara;Kang, Suk Nam
    • Food Science of Animal Resources
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    • v.41 no.6
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    • pp.1078-1094
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    • 2021
  • This research investigated the physio-chemical and microbial quality characteristics of dry fermented sausage from selected Pediococcus strains: P. acidiliactici (PE1) and P. pentosaceus (PE2) as compared to commercial starter culture (COS) during fermentation and ripening. Treatments showed no substantial variation (p<0.05) in water activity (aw) values across the study period. PE1 and PE2 treatments exhibited similar (p>0.05) pH values and presented remarkable (p<0.05) lower volatile basic nitrogen (VBN) and thiobarbituric acid reactive (TBARS) content than COS treatment throughout the ripening period. However, the pH values in COS batch were considerably lower than others. PE1 samples presented a significant highest (p<0.05) counts both in lactic acid bacteria (LAB) and total plate count (TPC) than COS and PE2 treatments at 7 days fermentation, and it resulted in a similar and higher TPC count as COS after the ripening period. After the ripening process, treatments are ordered based on LAB counts as follows: COS>PE1>PE2. All batches presented similar redness and yellowness attributes since the 7 days of fermentation and in lightness across the study period. Treatments were similar (p>0.05) in springiness and chewiness traits across the study period and in hardness characteristics in the ripened products. Cohesiveness was higher in PE1 and COS batches. No variation (p>0.05) in aroma and sourness sensory attributes of treatments. The color attribute was highest (p<0.05) in PE1 and PE2 treatments and PE1 had the highest overall acceptability. The overall outstanding merit exhibited by PE1 can be utilized in the commercial production of high-quality dry fermented sausage.

Quality and sensory properties of HMR-type pork Tteokgalbi containing roasted garlic powder (볶은 마늘 분말을 첨가한 가정간편식(HMR)형 돈육 떡갈비의 품질 및 관능적 특성)

  • Jeong, Chang-Hwan;Lee, Sol-Hee;Kim, Hack-Youn
    • Korean Journal of Food Science and Technology
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    • v.53 no.5
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    • pp.601-606
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    • 2021
  • This study investigated the quality and sensory properties of Tteokgalbi containing various amounts of roasted garlic powder by measuring the proximate composition, color, pH, cooking yield, electronic tongue, and sensory evaluation. Samples containing 3% and 5% roasted garlic powder had lower moisture content than the control group (p<0.05), however, protein content was higher (p<0.05). The redness of samples containing 3% and 5% roasted garlic powder was significantly higher compared to the control (p<0.05). pH decreased significantly with increasing amounts of roasted garlic powder (p<0.05). Cooking yield exhibited an upward trend with increasing levels of roasted garlic powder. The intensity scales of saltiness, sourness, and umami of samples containing roasted garlic powder were stronger than those of the control. Samples containing 3% roasted garlic powder scored the highest flavor and overall acceptability. These results indicate that adding 3% roasted garlic powder can enhance the quality and sensory properties of pork Tteokgalbi.