• The Korean Journal of Food And Nutrition
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• v.19 no.2
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• pp.227-233
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• 2006

The effects of adding green tea powder(GTP) on the quality and storage characteristics of sikhe, Korean traditional sweet rice drink, were studied, The values of sweetness and pH of the sikhe with GTP were $18.40{\sim}18.50%\;and\;5.81{\sim}5.85$, respectively. The L and a values were decreased, but the b value was highly increased when the amounts of GTP were increased. Sensory evaluation showed that color and flavor of sikhe made of GTP were the highest among the treatments. However, sweetness of sikhe with GTP was lowered as the addition of GTP was increased. Sensory attributes such as taste, tenderness, aftertaste and overall acceptability were significantly higher in sikhe perpared with 2% GTP than those of control group(p<0.05). During the storage, pH of the sikhe with GTP was not significantly changed at the nineteenth day of storage, but pH of control group was markedly decreased. The L, a and b values showed no significant changes during storage.

• The Korean Journal of Food And Nutrition
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• v.26 no.2
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• pp.184-191
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• 2013

This study performed physicochemical characteristics and sensory tests on brown sauce with different Salicornia herbacea L. (saltwort) content to find the best brown sauce recipe with saltwort. Moisture content increased with greater saltwort extract content. There was significant (p<0.001) pH difference with saltwort content. There was also significant (p<0.001) sweetness difference in the samples and sweetness increased with greater saltwort content. Viscosity measured at $20^{\circ}C$ and $60^{\circ}C$ was significantly (p<0.001) lower with greater saltwort content. The brightness of brown sauce containing saltwort extracts significantly (p<0.001) increased with greater saltwort content and its redness and yellowness usually decreased. SPS4 with the greatest saltwort content showed the highest value of 4.25% and DPPH radical removal increased significantly (p<0.001) with greater saltwort content. In the sensory test, the color value was lowest at 4.82 with BSL1 and the flavor value was lowest at 5.00 with BSL0, the control group. The taste and the flavor values were highest with BSL2 with 2% saltwort content. Overall acceptance was highest with BSL3, the brown sauce with 3% saltwort content, at 6.09. As a result, it was concluded that the brown sauce with 3% saltwort content was most suitable. Therefore, this study concluded that saltwort with various functions could be used for food and may be used to replace salt and have other functions in brown sauce, a popular sauce consumed in Korea.

• The Korean Journal of Food And Nutrition
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• v.31 no.4
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• pp.559-564
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• 2018

Rehmannia glutinosa root (R. root) has been used as an traditional medicine, and is important resource for natural medicines and functional foods. However, R. root contains catalpol which is bitter, and undigested sugars, including stachyose and raffinose, which can cause diarrhea. Therefore, this study was performed to identify the changes in reducing sugar from undigested sugars and in catalpol contents in R. root slurry induced by aging treatments. R. root slurry was treated at $10{\sim}70^{\circ}C$ for up to 72 hr; and extracted with a 50% ethanol solution. The catalpol content was analyzed using HPLC-UVD. Reducing sugar content generated from undigested sugars was measured by the Nelson-Somogyi methods, and the reaction rates were calculated from their variation according to aging time and temperature. During the aging treatment, reducing sugar increased and catalpol decreased. Their formation and degradation rates were highest at $50^{\circ}C$ and $30{\sim}40^{\circ}C$, and their rates were $2.05mg/g{\cdot}hr$ and 23.09 to 23.33%/hr, respectively. These results indicated that aging treatment can positively affect the sweetness and digestibility of R. root slurry. Therefore, an aging treatment could be considered for improving the taste and digestibility of R. root.

• Korean journal of food and cookery science
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• v.29 no.6
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• pp.777-784
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• 2013

With the development of economy and culture, Korean traditional rice wine, Makgeolli, has been widely consumed with increasing popularity in Korea, China and other Asian countries. In this study, we examined the quality characteristics of red bean Makgeolli: pH, total acidity, alcohol contents, sugar contents, reducing sugar, color, total flavonoid contents, DPPH, microbial properties, sensory evaluation of Makgeolli added with red bean (0, 5, 10 and 15% by rice weight) during fermentation for 7 days. There were no significant differences between samples in acidity, alcohol contents, reducing sugars and yeat cell counts, but total flavonoid contents increased with increasing ratio of red bean(p<0.05). Makgeolli added with 10% red bean showed the highest antioxidation activity, and was not significantly different with Makgeolli without red bean in flavor, sweetness, sourness, bitterness and overall acceptance in sensory evaluation. Therefore, Makgeolli added with 10% red bean was considered to be the most suitable for the manufacturing.

• Agricultural and Biosystems Engineering
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• v.1 no.2
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• pp.81-87
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• 2000

Quality characteristics of tomatoes irradiated with light (red light of far-red light followed two days later with a red light treatment), treated with ethylene, and stored in darkness were evaluated by subjective sensory and objective physical and chemical evaluations. Overall and individual liking evaluations and sensory evaluations were made by an untrained panel of eighteen people. A rankin gof treatments for consumer (panelist) acceptability was also conducted by the panel. Physical and chemical evaluations included surface color measurement (L*, a*, and b*), mechanical puncturing (firmness), soluble solids content (SSC), titratable acidity(TA), and tomato juice pH. Sensory data showed that outside color, inside color, and flavor of tomatoes treated with red light (R) and far-red light/red light (FR/R) were scored significantly higher than those of tomatoes treated with ethylene and those kept in darkness. The L* values for tomatoes treated with R and FR/R were lower (more darkening) than those for tomatoes treated with ethylene and those stored in darkness. Tomatoes treated with FR/R had the highest A* values, followed by those irradiated with R, treated with ethylene, and kept in darkness, respectively. Sensory values for firmness were similar for tomatoes treated with R, FR/R, and ethylene. Treatments had no significantly different effects on sweetness and acidity. There were no significantly different effects between treatments for pH, SSC, TA, and SSC/TA. From observations made during the study, it was suggested that R irradiation stimulated red color development in tomatoes after it had been delayed by FR irradiation. Consumer acceptability for tomatoes with either R or FR/R treatment was significantly higher than that for tomatoes treated with ethylene or stored in darkness. panelists' overall liking scores correlated well with all sensory variables except acidity, and also correlated highly with inside color, flavor, and sweetness (P<0.001). Overall liking versus flavor had the most pronounced relationship (r=0.78, P<0.001).

• Korean journal of food and cookery science
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• v.21 no.4 s.88
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• pp.422-432
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• 2005

Shinuncho(Angelica keiskei koidz)sulgi is a kind of steamed rice cake by an earthenware steamer. I made Shinuncho-sulgi samples with different amounts of Angelica keiskei koidz - powder and different types of sugars (sugar or honey). The more Angelica keiskei koidz powder it has the bitter it tastes but the lower sweetness, moistness and chewiness it has. Samples with honey have higher sweetness, moistness and chewiness but lower bitterness and after-swallowing than ones with sugar. Color is Shinsuncho-sulgi with $3\%$ of Angelica keiskei koidz - powder and honey has been judged to have the best quality. Flavor and Overall-acceptability are Shinsuncho-sulgi with $2\%$ of Amge;oca keiskei koidz - powder and honey has been judged to have the best quality. The more Angelica keiskei koidz powder it has the higher hardness but the significantly cohesiveness, springiness, gumminess, and chewiness it has. Samples with honey have higher hardness, springiness, cohesiveness, gumminess and chewiness, but lower adhesiveness, than ones with sugar. The moisture content of Shinsuncho-sulgi is $35.89\~37.08\%$. Samples with honey have higher b-value but lower L-value and a-value than ones with sugar. Based on the results of the study, the best ratio of ingredients is as follow non-glutinous flour 196g, Angelica keiskei koidz powder $2\%$ (4g), honey 35ml, salt 2g, water 20ml and $37.08\%$ of moisture content.

• Korean journal of food and cookery science
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• v.26 no.2
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• pp.138-145
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• 2010

This study was conducted to develop a novel tomato sauce using natural seasoning. The data was analyzed using SPSS for Windows (version 14.0). Two factors of the tomato sauce were varied was tomato paste and sugar. Nine tomato sauces were produced with various compounding ratios of tomato paste and sugar. The color, viscosity and sensory evaluations of the nine tomato sauces were determined. Items examined in the sensory evaluation were color, sweetness, viscosity and overall quality. Sweetness($4.44{\pm}1.36$), viscosity($5.16{\pm}1.28$) and overall quality($4.68{\pm}1.11$) of the tomato paste 340g and sugar 100 g sample got highest scores. Therefore, this composition was used as tomato spaghetti sauce. Tomato spaghetti sauce using a natural tomato sauce and artificial tomato sauce was prepared and subjected to a sensory evaluation. Items included in the sensory evaluation were taste, flavor, harmony, overall quality. In this analysis, all sensory item scores of the tomato spaghetti sauce using natural seasoning were significantly higher than when artificial seasoning was used. Therefore, the potential of commercialization of tomato sauces using natural seasoning was confirmed.

• Journal of Community Nutrition
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• v.8 no.2
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• pp.107-113
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• 2006

Sensory factors are important determinants of appetite and food choices but little is known about factors affecting taste acuity and preference of Koreans. Any factors causing deficits in sweet taste perception may lead to over consumption of simple sugar, which is related to several chronic diseases. This study was conducted to determine factors affecting sweet taste sensitivity and preference. Subjects were 30 government employees who were serving as school dietitians or in the area of public health while they were studying in the program for the qualification to become nutrition teachers. Sweet taste threshold and the optimally-preferred sweetness of omija jelly were determined by a sensory evaluation and general characteristics, health-related lifestyles, dietary habits and food preferences were determined using a self-administered questionnaire. For the subjects of this study, detection threshold concentration of sucrose solution was $0.184{\pm}0.06%$ and optimally-preferred sucrose concentration of omija jelly was $13.88{\pm}2.28%$ and there was no significant correlation between the sweet taste sensitivity and preference. Subjects who had higher(${\ge}4$ out of 10) physical or psychological stress and who had late getting-up time (after 7am) tended to have lower sweet taste threshold (higher sensitivity) than their counterpart. The sweet taste preference determined by optimally-preferred sucrose concentration of omija jelly tended to be lower in the subjects who eat slowly. Those who answered in the questionnaire to prefer sweet foods did have significantly higher optimally-preferred sucrose concentration of omija jelly. Further research is required to determine whether decreased sensitivity and increased preference for sweetness can increase the actual intake of simple sugar. (J Community Nutrition 8(2): 107 -113, 2006)

• Journal of the Korean Society of Food Culture
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• v.5 no.4
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• pp.431-436
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• 1990

The functional properties of novel sugar derivative sweeteners, fructo-oligosaccharide, maltitol, sorbitol and high maltose syrup(HMS) were examined for their humactant effect, lactic acid bacterial growth, Streptococcus mutants growth and relative sweetness compared to sucrose. Sorbitol exhibited remarkably high water activity reducing capacity, whereas fructo-oligosaccharide and maltitol showed the same level as sucrose. Maltitol showed distinct anti-bacterial(bacteriocidic) effect against Stc. mutants and most of lactic acid bacteria tested except for L. plantarum. The molar basis relative sweetness of sugar derivatives in comparison with 1%(w/w) level of sucrose were 0.69 for Neosugar(fructo-oligosaccharide), 0.21 for sorbitol, 0.50 for maltitol and 0.27 for HMS.

• Journal of the Korean Society of Food Culture
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• v.30 no.5
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• pp.674-681
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• 2015

The purpose of this study was to analyze factors affecting acceptance of four kinds of dak-jjim samples in third year school-aged children (n=100). Soy sauce, red pepper paste, Vietnam fish sauce, and star anise were applied to samples for their familiar and exotic characteristics. Significant differences among samples were observed in odor, taste, and acceptance (p<0.001). Soy (Soy sauce sample), RPPaste (Red pepper paste sample), and Soy_FishS (Soy sauce and Vietnam fish sauce sample) samples scored higher than Soy_StarA (Soy sauce and star anise sample) sample. On the other hand, there were no significant differences in intensities of saltiness, sweetness, and hot spicy flavor (p>0.05). Liked attributes in samples were saltiness, sweetness, chicken flavor, potato flavor, moistness of chicken, hot spicy flavor, and color. Disliked attributes in samples were hot spicy flavor, saltiness, and ginger flavor. Significant differences among samples were observed in familiar intensity and willing to try again (p<0.001). Soy, RPPaste, and Soy_FishS samples scored higher than Soy_StarA sample. Panels considered taste (46%) and nutrition (45%). Higher familiar intensity of sample was associated with higher acceptance in samples. In other words, familiarity of food affects acceptance of food. Therefore, familiar ingredients such as soy sauce and chicken can be used for development of Korean menu items considering taste and nutrition with enhanced Korean food acceptance in school-aged children.