• Journal of the East Asian Society of Dietary Life
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• v.24 no.6
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• pp.785-792
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• 2014

This study investigated the optimal mix ratio of frozen-dried loquat fruit powder and the optimun conditions for making Seolgidduk by analyzing chemical properties, rating moisture contents, color, mechanical quality characteristics and sensory characteristics Seolgidduk was made with 0, 2, 4, 6 and 8% frozen-dried loquat fruit powder, which contains functional components. Chemical analysis showed that loquat fruit powder contained of 12.87% water, 2.23% crude protein, 0.55% crude fat, 3.57% crude ash and 3.89% crude fiber. Water content of Seolgidduk containing loquat fruit ranged from 36.58~39.18%. With more loquat fruit powder L value decreased, while the 'a' value and 'b' values increased. According to scanning electronic microscopy, Seolgidduk containing frozen-dried loquat fruit powder showed weak coherence. Hardness decreased with more frozen-dried loquat fruit powder. In the sensory test, Seolgidduk with 4% loquat fruit powder was the most preferred with less sourness, proper softness, moisture and chewiness. Based on the results of this experiment, Seolgidduk with 4% loquat fruit powder showed less hardness than the control group. These results show that quality and preference increased when 4% loquat fruit powder was added to Seolgidduk. Therefore, Seolgidduk with 4% of loquat fruit powder is expected to increase quality and preference of Seolgidduk.

• Journal of the East Asian Society of Dietary Life
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• v.13 no.4
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• pp.318-325
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• 2003

The purpose of this study was to investigate quality characteristics of Seolgidduk containing 0, 3, 5, 7 and 9％ Poria cocos Wolf powder during the storage at 2$0^{\circ}C$ by measuring water content, color value, texture and sensory characteristics. By increasing the amount of Poria cocos Wolf powder, water content of Seolgidduk did not show any significant difference during storage. Hunter color L value of Seolgidduk decreased, and a and b value increased significantly by increasing the amount of Poria cocos Wolf powder. The cohesiveness of Seolgidduk decreased but adhesiveness, gumminess and chewiness were not significantly different by increasing the amount of Poria cocos Wolf powder. 3％ Poria cocos Wolf added Seolgidduk was the highest in color, odor, taste, softness, moistness and overall preference from the sensory evaluation. Above results indicated that 3％ Poria cocos Wolf added Seolgidduk showed the best quality through sensory and texture analysis.

• Journal of the East Asian Society of Dietary Life
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• v.15 no.5
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• pp.591-597
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• 2005

This study tried to investigate the best mixing ratio by reviewing the quality characteristics such as moisture content, chromaticity and texture, and sensory characteristics of Seolgidduk made of different ratios of persimmon extracts. A and b color values appeared to increase and L value (lightness) to decrease according to the increase of persimmon extracts ratio. In the case of texture, hardness, adhesiveness, springiness, cohesiveness, gumminess and chewiness increased according to the increase of added amount of dried persimmon extracts. The inside section of Seolgidduk was investigated through scanning electron microphotograph, and the $15\%$ of dried persimmon extracts had the smallest and uniform air cells. Seolgidduk with $15\%$ persimmon extracts showed the highest color, flavor and chewiness scores of 3.85, 3.65, and 3.80 from sensory evaluation, respectively. The moistness displayed significant differences according to the increment of the extract Seolgidduk with $15\%$ persimmon extracts displayed the highest overall acceptability of 3.95, while that of the control 3.10. From the above results, $15\%$ mixing ratio of dried persimmons extracts seems to be the most desirable for making Seolgidduk.

• Korean journal of food and cookery science
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• v.19 no.6
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• pp.777-782
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• 2003

This study was carried out to investigate the characteristics of mulberry fruit seolgidduk. Four percent additions of mulberry were evaluated as the most suitable concentration for seolgidduk, in order to improve the color of gum metal gray and sour smell. Therefore, in order to improve the preference, citric acid was added. The acidity of mulberry fruit seolgidduk increased and its pH decreased significantly by increasing the amount of citric acid. The moisture content of mulberry fruit seolgidduk showed no significant difference between the groups with added citric acid and the control group. The L value decreased as the citric acid concentration increased. Color a and b (Ed-define 'a' and 'b') values increased significantly by increasing the mont of citric acid. The hardness, cohesiveness, springiness, gumminess and brittleness decreased as the citric acid was added. From the sensory evaluation, mulberry fruit seolgidduk with 0.01％ citric acid added was the most preferred in taste, chewiness and overall acceptability. These results indicated that mulberry fruit stolgidduk with 0.01％ citric acid added showed the best quality.

• Journal of the Korean Society of Food Culture
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• v.29 no.1
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• pp.44-53
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• 2014

Various Korean healthy foods containing Deoduk were developed and standardized recipe. Sensory evaluations of Koreans and foreigners for these developed foods were performed by using the 5-point hedonic scale. The results of the sensory test on foods containing Deoduk were as follows: Deoduk bap (2.90~3.91), Deoduk seolgidduk (3.19~4.40), Deoduk gangjeong (3.00~4.60), riasted Deoduk with red pepper paste (2.73~4.20), Deoduk pine nut juice salad (2.40~3.96), and Seopsansam (3.91~3.81). Deoduk seolgidduk, developed by using a recipe for Sansambyeong which in a Chosun dynasty cook-book, was highly preferred by Africans, Japanese, and Koreans. In particular, all foreigners except Southeast Asians liked Deoduk gangjeong, and both Koreans and foreigners liked Seopsansam. Foreigners' experience of eating foods containing Deoduk was high at 'No' (68.9%), whereas Japanese (60.0%) had previous experience. Exactly 91.6% of Koreans responded 'Yes' to the question of whether or not Deoduk food is good for health, whereas the proportion of foreign respondents who said 'Yes' was 43.2%, 'No' was 5.4%, and 'I don't know' was 51.4%. Deoduk seolgidduk was preferred by Japanese, and most foreigners preferred Deoduk gangjeong and Seopsansam. Therefore, Deoduk could be developed as a healthy food for globalization of Korean food. However, as foreigners' awareness of Deoduk is low, we must positively promote the health function of traditional food ingredients and develop various menus suitable forforeigners' tastes for the globalization of Korean food.