• Journal of the Korean Society of Food Science and Nutrition
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• v.37 no.3
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• pp.367-372
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• 2008

Yukwa were added with non-fermented tea (Bucho-cha and Okro-cha), semi-fermented tea (Ooreung-cha), and fermented tea (black tea) to investigate the effect of different kinds of tea powder on quality characteristics of Yukwa during storage. Yukwa samples were used for analysis such as crude lipid, moisture, texture, antioxidative property (TBA value), and sensory test. There were no significant differences on crude lipid, moisture, and texture analysis. Green tea powder treatment showed strong antioxidant activity. In particular, antioxidant property of non-fermented tea exhibited a higher antioxidative effect than that of the other samples. Sensory evaluation showed that sensory scores of samples added with non-fermented tea were significantly higher than the other samples, indicating that the addition with 0.1% of non-fermented tea powder could contribute to the improvement of quality and shelf-life of Yukwa during storage.

• Food Science and Preservation
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• v.18 no.4
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• pp.481-487
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• 2011

This study was performed to investigate physicochemical properties of cold-air dried persimmon and traditional dried persimmons. Moisture contents and water activity were lower at cold-air dried persimmon than traditional persimmons. Crude protein and crude fat were not significant differences, Crude ash and N-free extracts of cold-air dried persimmon were, relatively, high as comparing to the traditional dried persimmons. Brix in cold-air dried persimmon was the highest. In the hunter's color values, L, a and b values of cold-air dried persimmon were lowed than traditional dried persimmons. There was not significant differences at the texture of semi-dried persimmons, but cold -air dried persimmon were relatively high than the traditional dried persimmons in hardness, gumminess, chewiness. Free sugars contents were only glucose and fructose in an sample. Free amino acids contents were seventeen sorts, glutamic acid and alanine were high in order of contents.

• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.5
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• pp.858-864
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• 2001

This study was performed to investigate the effect of sodium lactate (SL, 60%) and a mixed fat replacer (FR) on the product quality and shelf-life effect of low-fat bologna sausage (LFBS) in a model system during refrigerated storage. Low-fat and regular-fat bologna sausages had pH values ranged from 6.15 to 6.30 and water activity values ranged from 0.95 to 0.96. LFBS had a moisture content of 74~76%, <2% fat and 14~15% protein, whereas regular-fat bologna had 60% moisture, 22% fat and approximately 12% protein in the final products. Expressible moisture (%) increased (p<0.05) in all bolognas, resulting in the soft texture, as the storage time (weeks) increased. LFBS manufactured with SL and a FR had lower (p<0.05) the cooking loss (%) and had higher (p<0.05) texture profile analysis (TPA) values than the regular-fat counterpart. As the sodium lactate level increased up to 5% in the formulation of LFBS, vacuum purge and TPA hardness values also increased (p<0.05), but thiobarbituric acid (TBA) values decreased (p<0.05). Total plate counts of LFBS were reduced (p<0.05) when the addition level of 60% SL solution was more than 3.3%. This result indicated that the increased level of SL (>3.3%) in the combination of a FR in the formulation of LFBS improved the product quality and did inhibit the total microbial growth of LFBS during storage, as compared to the control.

• Food Engineering Progress
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• v.21 no.2
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• pp.116-125
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• 2017

This study aims to make extruded rice snack with high quality in texture and nutrition by adding mealworm. Addition of the mealworm has the merit to fill in high-quality protein and unsaturated fatty acids which are insufficient in rice. Thus, the physicochemical properties were investigated through the process of extrusion cooking. As the extrusion process varied, the die temperatures were set to $120^{\circ}C$ and $130^{\circ}C$. Also, the moisture contents were adjusted to 30% and 35%. The specific length, the expansion ratio, and the water absorption index increased as the added content of mealworm became higher. On the contrary, the density, the breaking strength, the apparent elastic modulus, and the water solubility index decreased. As mealworm and moisture content increased, DPPH radical scavenging activity significantly increased but the rancidity decreased. As a result, the addition of mealworm to the extruded rice snack was effective in improving texture, nutrition, and antioxidation.

• Korean Journal of Food Science and Technology
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• v.53 no.3
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• pp.321-328
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• 2021

Brownies containing whey powder (WP) with different levels of substitutions for wheat flour (0, 10, 20, 30, and 40% substitution for WP 0, WP 10, WP 20, WP 30, and WP 40, respectively) were prepared, and their properties were compared. Regarding appearance, the collapse of the sample surface noticeably started from WP 30. The moisture content was higher in samples containing WP than in the control (WP 0), and the weight of the brownie increased with WP content. As the WP amount increased, both the total and specific volumes of the brownies decreased. Regarding texture, a higher amount of WP resulted in a decrease in hardness, whereas adhesiveness increased significantly. The antioxidant activity also increased with increasing WP amount (from 35.28 to 51.47%). Regarding sensory characteristics, 20 or 30% WP in brownies increased mouth-feel properties, taste, and overall preference. Based on the above results, WP could improve the quality of brownies, and a substitution level of 20% could be the most appropriate.

• Journal of the East Asian Society of Dietary Life
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• v.21 no.1
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• pp.46-52
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• 2011

This study was conducted to evaluate the quality characteristics of mung bean starch gel (MBSJ) containing carrot (CMBSJ), spinach (SMBSJ), and mulberry (MMBSJ) juice. The moisture contents of MBSJ, CMBSJ, SMBSJ and MMBSJ were not different significantly. The color of MBSJ was in good accordance with the $L^*$, $a^*$, $b^*$ values and hue angle of the material juices. The hardness levels of CMBSJ, SMBSJ, and MMBSJ were lower than that of MBSJ, but the springiness, cohesiveness, and chewiness of CMBSJ and SMBSJ were higer than those of MBSJ. Antioxidative activities of CMBSJ, SMBSJ, and MMBSJ were greatly increased compared to those of MBSJ. The syneresis and hardness of colored the MBSJ decreased during storage at $4^{\circ}C$. In the sensory evaluation, colored MBSJ scored the highest in taste, shine, elasticity, and overall acceptability. Based on the above results, we expect that mung bean starch gels with carrot, spinach and mulberry juice have good quality characteristics and antioxidant activity.

• Korean Journal of Food Science and Technology
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• v.43 no.1
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• pp.77-82
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• 2011

This study was conducted to provide information for improving the quality characteristics of Buckwheat Soksungjang (BWS). We determined aminotype nitrogen content, total microbial flora counts, the population of Bacillus cereus, presence of volatile compounds, fibrinolytic activity, antioxidant activity, ACE inhibition rate, and a sensory evaluation. The aminotype nitrogen increased gradually during fermentation. We found a decreasing population of B. cereus during fermentation, thus, the edible period for BWS was more than 30 days after fermentation. Acetaldehyde, butanol, and pyrazine were detected as volatile compounds after fermentation. The fibrinolytic activities of a 10% BWS water extract were high at 120.8 units compared to the control (71.6 units). In a sensory evaluation, Soksungjang with 60% added BW showed a significantly higher score (p < 0.001) for color, taste, smell, texture, and overall. The results suggest that a new type of shortened fermented soybean paste had good safety, bioactivities, and sensory characteristics within 4 weeks.

• Journal of the Korean Society of Food Science and Nutrition
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• v.40 no.6
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• pp.875-884
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• 2011

The purpose of this study was to examine the qualities of optimized muffins with germinated brown rice soaked in mycelial culture broth of Phellinuslinteus (GBRP) using response surface methodology. Firstly, general compositions of optimized muffins with GBRP were higher than that of control and total sugar contents were similar. However, the total free amino acid and constitutional amino acid contents except for GABA were lower than those of control. Starch hydrolysis in control was higher than in optimized muffins with GBRP, whereas protein digestibility and protein efficiency ratio were not. The weights of optimized muffins with GBRP were higher than that of control (p<0.01), whereas height (p<0.01) and pH (p<0.001) were similar. The hardness (p<0.05) and chewiness (p<0.05) of optimized muffins with GBRP were higher compared to control; adhesiveness, springiness, and gumminess were similar, but cohesiveness (p<0.01) was not. The flavor (p<0.05) and taste (p<0.01) of optimized muffins with GBRP were higher than those of control; appearance, texture and overall acceptability were similar, but color (p<0.05) was not. The total polyphenol contents (p<0.01), DPPH radical scavenging activity (p<0.01), and superoxide dismutase-like activity (p<0.05) of optimized muffins with GBRP were higher than those of control, but nitrite scavenging activity was similar.

• Korean Journal of Food Science and Technology
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• v.48 no.4
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• pp.354-360
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• 2016

We investigated the quality and antioxidant activities of sponge cake prepared containing 1-5% of green tea powder (GT). The water content in the cake increased with an increase in the amount of GT added. Although the hardness and springiness of the rice sponge cake increased, the adhesiveness decreased with increasing the level of GT. The cohesiveness, chewiness, and resilience of the rice sponge cake with GT were similar to those of the control. Chromaticity determination revealed that lightness, redness, and yellowness of the crust decreased with increasing GT content. Total polyphenol and flavonoid contents increased proportionally with increasing GT level. Antioxidant activity, measured by DPPH and ABTS radical scavenging as well as reducing power activities, was significantly higher in the rice sponge cake with GT than in the control. Sensory evaluation determined that addition of 1-3% GT to the rice sponge cake maintained the color, taste, texture, flavor, and overall acceptance similar to that of the control.

• Journal of the Korean Society of Food Science and Nutrition
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• v.40 no.7
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• pp.986-992
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• 2011

The purpose of this study was to examine the qualities of muffins with 20, 40, and 60% brown rice flour (BRF). The muffins containing 20, 40, and 60% BRF were lower than control muffins (made with regular flour) in weight, height, pH, and moisture content. No significant differences were observed between BRF muffins in weight and moisture content; however, height and pH decreased with increasing amounts of BRF added (p<0.05). The moisture content of control muffins decreased after storage at $30^{\circ}C$ and was not significantly different than BRF muffins (p>0.05). The hardness and resilience in the controls were higher than BRF muffins, but increasing the amount of BRF added in muffins increased both hardness and resilience (p<0.05). The cohesiveness and springiness in the controls were higher than in BRF muffins and decreased with increasing the amount of BRF added to muffins (p<0.05). The gumminess and chewiness in muffins with BRF were higher than controls and were increased when the amount of BRF added in muffins was increased (p<0.05). However, the adhesiveness of the samples was not significantly different (p>0.05). In sensory evaluation, the external color in muffins with 20% BRF and the internal color in controls were the highest (p<0.05). The taste, aroma, texture, and overall acceptability were the highest in muffins with 60% BRF (p<0.05). The antioxidant activities, DPPH radical scavenging, and superoxide dismutase-like activity of muffins were increased with increasing the amount of BRF added to muffins (p<0.05).