• Food Engineering Progress
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• v.14 no.2
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• pp.146-152
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• 2010

A Korean traditional food, sulgidduk, was prepared with the supplementation of whole wheat flour (WWF) high in dietary fiber, and its quality characteristics were investigated depending on the WWF content (3, 5, and 7%). There was no significant difference found in moisture content of final products. Colorimetric analysis revealed that L-value representing brightness decreased with increasing WWF content. In texture profile analysis, freshly-made samples did not show measurable difference in hardness depending on WWF content. However, stored samples at 25$^{\circ}C$ for up to 3 days exhibited a decrease in hardness with increasing WWF content, indicating retardation of retrogradation related to WWF addition. Springiness and chewiness values showed decreasing trend with WWF content especially for stored samples. Retardation of retrogradation with WWF addition was also evidenced by observing the increment of time constant calculated from Avrami equation. Analysis of sensory evaluation demonstrated that considering flavor, taste, texture, and overall acceptability, 5% substitution of rice flour with WWF could be a promising formulation for quality product with high nutritional value.

• Culinary science and hospitality research
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• v.18 no.2
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• pp.172-181
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• 2012

This study examines the moisture contents, color, texture and sensory characteristics of $sulgidduk$ added with $agaricus$ $blasei$ Murill powder(0%, 2%, 4%, 6%, 8%, 10%). According to the result, the moisture content decreased with increasing addition of the $agaricus$ $blasei$ Murill powder. The L-value decreased with increasing addition of $agaricus$ $blasei$ Murill powder. However, a-value and b-value increased with increasing addition of$agaricus$ $blasei$ Murill powder. For the texture of$agaricus$ $blasei$ Murill powder $sulgidduk$, its hardness, gumminess and chewiness increased with increasing addition of $agaricus$ $blasei$ Murill powder while its adhesiveness and springiness decreased. The sensory evaluation showed that the one added with 6% of $agaricus$ $blasei$ Murill powder was the best in color, flavor and overall acceptability. Consequently, the optimal $sulgidduk$ formulation includes 6% of $agaricus$ $blasei$ Murill powder in color, flavor and overall acceptability.

• The Korean Journal of Food And Nutrition
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• v.22 no.3
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• pp.321-331
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• 2009

In this study, Salvia miltiorrhiza Bunge(Danshen) powder was extracted with ethanol, and its antimicrobial activity was investigated. The ethanol extract of the Danshen had antimicrobial activity against Bacillus subtilis, Escherichia coli, and Staphylococcus aureus. The inhibition zones of the Danshen extract(3 mg/disc) against B. subtilis, E. coli and S. aureus were 13, 12 and 8.5 mm, respectively. To test the food preservation effect of Danshen and determine the optimal ratio of the Danshen extract in a formulation, Sulgidduk samples were prepared with substitutions of 0, 0.25, 0.5, 0.75 and 1% Danshen extract, and then their quality characteristics were investigated over 4 days of storage. According to the results, total cell counts showed a decreasing trend with an increasing amount of added Danshen extract. Moisture contents were not significantly different among the Sulgidduk samples. As the content of Danshen extract increased, the L-values of samples decreased and the a- and b- values increased. For the textural characteristics, the hardness, gumminess, and chewiness of the Sulgidduk samples decreased as the amount of Danshen extract increased; however, they increased with the progression of storage time. In the sensory evaluation, the control group had significantly higher scores for color, flavor and after-taste as compared to the Danshen extract-added groups. With increasing Danshen extract contents, flavor and overall acceptability decreased, while Danshen flavor, bitterness and off-flavor increased. Chewiness was not significantly different among the samples. In conclusion, the results indicate that substituting 0.5% Danshen extract in Sulgidduk is optimal for quality and provides a product with reasonably high overall acceptability.

• Korean journal of food and cookery science
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• v.27 no.6
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• pp.723-733
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• 2011

This study was performed to examine the optimum addition amount of Hizikia fusiformis powder to be used with rice flour in the preparation of Hizikia fusiformis Sulgidduk (traditional rice cake). Hizikia fusiformis powder was added to rice powder at ratios of 5, 10, 15 and 20% (w/w). The moisture content of Sulgidduk was increased with the addition of Hizikia fusiformis powder, whereas the pH content was decreased. The addition also lowered the lightness and yellowness values but increased the greenness value. Mineral contents were increased. Hardness, springiness, and brittleness were decreased, and cohesiveness was increased as the added powder content also increased. In the sensory evaluation of Hizikia fusiformis Sulgidduk, color, flavor, taste, softness, chewiness, moistness, cohesiveness, and overall acceptability characteristics were all highest at the 10% addition level. Thus it can be proposed that this is the ideal level of Hizikia fusiformis addition in terms of the sensory properties of the cooked product.

• The Korean Journal of Food And Nutrition
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• v.22 no.2
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• pp.229-237
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• 2009

Physical, textural and sensory properties of Seolgiddeok prepared with different amounts of broccoli(Brassica oleracea var. italica Plen.) powder were investigated during 3 days of storage. Moisture content decreased gradually during storage and was less in broccoli powder-amended samples. The color L value decreased significantly with increasing broccoli powder, whereas both redness and yellowness increased. Texture analyses revealed that hardness, chewiness, gumminess, adhesiveness and fracturability of Seolgiddeok tended to decrease in proportion to the amount of broccoli powder in the formula. Seolgiddeok gelatinization was investigated using amylographing. Break down and setback were low in broccoli powder Seolgiddeok. Sensory evaluations revealed that, Seolgiddeok prepared with broccoli powder was superior in flavor, chewiness, softness to unamended samples. Seolgiddeok prepared with 3% broccoli powder showed the highest overall acceptability score. Use of broccoli powder in Seolgiddeok preparation improves sensory characteristics and delays retrogradation.

• Korean journal of food and cookery science
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• v.20 no.6 s.84
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• pp.575-580
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• 2004

This study was carried out to investigate the characteristics of Hericium erinaceus sulgidduk. The moisture content of Hericium erinaceus powder sulgidduk showed no significant difference between the added Hericium erinaceus powder and control groups. The L value decreased as the Hericium erinaceus powder concentration increased. The 'a' and 'b' color values were increased significantly when the amount of Hericium erinaceus powder was increased. The hardness, cohesiveness, chewiness and gumminess decreased with increasing Hericium erinaceus powder addition. From the sensory evaluation, Hericium erinaceus sulgidduk with the additions of 3 and $6\%$ Hericium erinaceus powder were the most preferred with regard tochewiness, softness and overall acceptability. These results indicated that Hericium erinaceus sulgidduk with the addition of 3 and $6\%$ Hericium erinaceus powder have the best quality.

• Korean journal of food and cookery science
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• v.15 no.3
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• pp.216-223
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• 1999

The purpose of this study is to find out the optimal mixing ratios of three different amounts of green tea powder, sugar and water for preparation of Sulgiduk through Response Surface Methodology based on the color, sensory, and texture test. The green tea powder levels were included 0.5∼1.0%, water levels were included 15∼25% and sugar levels were included 5∼15% per weight of rice powder. The optimal mixing ratios of a green tea powder, sugar and water for manufacturing the best quality of Sulgiduk were 1.0%, 12% and 22%, respectively.

• Korean journal of food and cookery science
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• v.16 no.6
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• pp.640-643
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• 2000

This study was carried out to investigate the effects of addition ratio of reddish-brownpigmented rice(Suwon 451) on the color difference, mechanical characteristics and gelatinization degree, sensory characteristics of Seolgid-deok. As the amount of reddish-brown pigmented rice was increased, redness was getting increased, lightness and yellowness was getting decreased. In hardness, adhesiveness, cohesiveness and chewiness, as the amount of pigmented rice was increased, was getting decreased and springiness was getting increased. As the amount of pigmented rice was increased in Seolgiddeok, gelatinization was getting increased. In sensory evaluation, quality characteristics of Seolgiddeok with 20% reddish-brown pigmented rice added was better in color, sweetness and overall quality than those of Seolgiddeok without reddish-brown pigmented rice.

• Korean journal of food and cookery science
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• v.29 no.3
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• pp.233-239
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• 2013

This study was conducted to investigate rheological and sensory characteristics of Sulgidduk added with Astragalus membranaceus powder. The moisture content of the Sulgidduk ranged from 42.03% to 43.38%. The addition of Astragalus membranaceus powder in the Sulgidduk tended to decrease the pH value, but did not change $brix^{\circ}$ values of the samples. the addition of Astragalus membranaceus powder in the Sulgidduk tended to decrease the lightness (L) in Hunter color value, but to increase the redness (a) and yellowness (b). For the textural characteristics, the addition of Astragalus membranaceus powder decreased the hardness and springiness. In sensory evaluation, the addition of 1.5% Astragalus membranaceus powder had the best score in taste and overall preference. Therefore, this results suggest that adding 1.5% Astragalus membranaceus powder could be applied for making Astragalus membranaceus Sulgidduk.

• Korean journal of food and cookery science
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• v.28 no.6
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• pp.695-701
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• 2012

The aim of this study was to determine the optimum amount of apricot paste to add to rice flour for the preparation of Sulgidduk. As the apricot paste level of the Sulgidduk increased, the moisture contents of samples increased (40.10-43.71%), The color of L-value decreased, while the a- and b-values increased, with increasing amounts of added apricot paste Sulgidduk. According to the mechanical evaluation results, as the apricot paste level of Sulgidduk increased, the hardness decreased. The cohesiveness was highest in the 16% apricot paste sample, and the springiness, gumminess, chewiness, and adhesiveness were highest in the 0% apricot paste sample. From the sensory evaluation results, the 12% apricot paste adding Sulgidduk received the highest overall acceptability scores. In conclusion, based on its sensory and mechanical qualities, the optimal Sulgidduk formulation consisted of 12% apricot paste added to rice flour.