The purpose of this research was to investigate the effects of herbs, including rosemary, thyme, oregano, ginger, and green tea, on the quality characteristics and antioxidant activity of Yagkwa. After 16 days of storage at $60^{\circ}C$, all the herb-added samples showed significantly lower values for acid, TEA and peroxide than the control. The samples with rosemary and thyme showed significantly higher antioxidant activities than the other samples. The samples with rosemary and ginger showed significantly lower L-values than the control sample and the samples with thyme, oregano and green tea showed significantly lower a-values than the control. For the b-value, the control sample had the highest value. In the sensory evaluation of the Yakgwa, there were no significant differences between the samples in terms of color, flavor and texture. For overall acceptability, the rosemary-added sample showed the highest score among the samples and the thyme-added sample showed a significantly lower score than the control. In the texture analysis, all the herb-added samples, except for green tea, showed higher hardness than the control. In conclusion, the addition of herbs would be a useful way to enhance the antioxidant quality of yakgwa and rosemary would be the best choice when considering antioxidant activity and sensory characteristics.
This study investigated the effect of addition of pumpkin on the physicochemical properties of rice sponge cakes. Water retention capacity(WRC) was lowest in control preparations to which no pumpkin flour was added. WRC increased as more pumpkin flour was added and rice flour with 25% of added pumpkin flour showed a WRC of 89.0%. Similar to WRC, alkaline water retention capacity(AWRC) also increased as more pumpkin flour was added and ranged from 69.7% to 80.7%. As the amount of pumpkin flour added increased, the pH increased. Similar to the sedimentation value, the Pelshenke value also increased as the amount of the added pumpkin flour increased. The gelatinization temperature did not vary significantly between the samples(p<0.05). The midline peak height, which is the height of the peak point from the baseline, showed the same tendency with that of the midline peak time, but was not significantly different between samples(p<0.05). Volume was decreased as the amount of the added pumpkin flour increased. The weight of the rice sponge cakes showed significant difference increasing with the increasing added pumpkin flour(p<0.05). There was significant difference as the specific loaf volume decreased with the increasing pumpkin flour(p<0.05).
Tomato sauce is widely known as a health food, In this study perilla leaf was added to a tomato sauce and the resulting functional improvements were assessed. The moisture of the tomato sauce WITH 2% added perilla leaf was 89.52%, the highest observed likewise, sample pH also significantly increased with 2% perilla leaf, to the highest pH of 4.71, (p>0.001). Lightness L value of the control group was the highest at 40.70, and the redness a value and yellowness b value were highest in, the control group, at 15.77, and 17.70, respectively. The highest salinity was foung with 2% perilla leaf, 0.96, and the sugar content with 2% perilla leaf, was 9.57. The reducing sugar was highest in the control with 63.08. The change in the total bacterial counts was measured during 9 days of storage at $4^{\circ}C$, When perilla leaf was added to, the tomato sauce, no microorganisms were detected until 0~1 days of storage. After five days of storage, microorganisms were detected in the group with 2% perilla leaf. The control group ($1.8{\times}10^5$ CFU/ml) had the highest levels of microorganisms. As the amount of perilla leaf, the total viable count of microorganisms detected was less. In the acceptability test results, the color 6.9 of the 1.5% treatment group, received the highest evaluation. Flavor and taste of the 2% perilla leaf treatment group were highly appreciated at 6.1 and 6.6, respectively. The ranking of overall acceptability was 1.5%>1%>0.5%>10%>2% of perilla leaf; 2% perilla leaf was the most underrated. Based on these results, up to 1.5% perilla leaf could be added to tomato sauce and the commercial potential could be very high.
This study was carried out to check changes of components in the slaughter waste by the bacteria isolated from slaughter wastes from Gyungnam Province from May to June 2000, and to find usefu] organism for treatment of the waste. Bacteria used in this study were Aeromonas hydrophila, as the dominant of the waste. Optimum conditions for bacterial culture were obtained as the temperature of 35$^{\circ}C$, pH 6.5, and shaking of 120 rpm in nutrient broth. The mean values of dissolved oxygen was 4.14 mg/1; biochemical oxygen demand, 1731.21 mg/1; ratio of BOD/COD, 0.53-0.64; ratio of T-P/T-N, 1.0-1.41; and viable counts of the waste, 5.47${\times}$10$\^$7/ CFU. Little change in total nitrogen observed by 36 hr of the culture. The largest amount of increasing NH$_4$$\^$+/-N was observed in the sample that 10% of the waste added in nutrient broth with A. hydrophila showing the value of 29.19 mg/l at the beginning to 570.36 mg/1 by 36 hr of culture. However, the highest increasing ratio between initial amount and finals at 36 hr of culture showed as 41.6 times when 3% of the waste added. NO$_3$ -N was decreased showing the value of 71.27 mg/1 to 32.14 mg/1 by 24 hr of culture with the organism when 10% of the waste added in nutrient broth. Total phosphorus was decreased showing the value from 188.74 mg/1 to 101.41 mg/1 after 12 hr of culture with the organism when 5% of the waste added in nutrient broth, while T-P was decreased gradually by 24 hr of culture from 193.8 to 101.4 mg/1 when 10% of the waste added.
This study examines the quality characteristics of cream soup added with pomegranate cortex powder(0~0.8%). As for the proximate composition, the control group had significantly(p<0.05) higher moisture content than the PGCP samples; however, crude ash decreased with increasing PGCP content The PGCP samples presented significantly(p<0.05) higher viscosity of the control group. As the PGCP content increased, pH decreased. As for the color, Hunter L value increased with dark color while a value decreased with the PGCP content increased. b value decreased in the group added with 0.8% of PGCP content In terms of sensory evaluation, color, flavor decreased with the PGCP content increased. Viscosity was high in the group added with 0.4% of PGCP content Overall acceptability was the highest in the group added with 0,2% of PGCP content while bitterness, astringency, bitterness, and off-flavor increased. There were no significant(p>0.05) differences in creamness of the cream soup among the samples. In conclusion, the results indicate that the addition of 0.2% PGCP to cream soup is desirable for quality and provides good physiological properties to the products.
This study was conducted to examine the sensory characteristics and the experimental of the medicinal demi-glace with varying quantity of omija extracts added. First, according to the result of this study, demi-glace sauces with varying quantity of omija extracts added were as follows; (1) pH : The pH of control groups was 5.13 and omija sauces ranged from pH 4.18 to pH 4.81. And the more omija extracts were added, the less pH was found. (2) $^{\circ}Brix$ : The control was 10.2 and omija sauces ranged from 11.1 to 13.0 $^{\circ}Brix$. The more omija extracts were added, the higher $^{\circ}Brix$ was found. (3) Color : The heavier weight of omija were added, the less L value was found; however, a, b values were increased. Secondly, the results of sensory evaluation based on authentic tastes of demi-glace sauces with the different levels of omija added were as follows; In terms of aftertastes and overall acceptability preference of demi-glace sauces, males and females preferred 2% added omija sauces. There were no significant differences in gender, but there were significant differences in sample sauce(p<0.001). This study found that 2% sauce was recommended as the best for the application of medicinal demi-glace sauce with omija.
New type yogurt base were prepared from milk added with skim milk powder or purple sweet potato, and fermented by lactic acid bacteria (Streptococcus thermophilus and Bifidobacterium infantis, 1:1, v/v). The yogurt proudcts were evaluated for acid production(pH, titratiable acidity), number of viable cell, viscosity, sensory properties, and color value. The composition of some organic acids was also analyzed by GC. The acid production slightly decrerased by addition with purple sweet potato. There was no significant difference in viable cell counts between control (yogurt added with only skim milk powder) and yogurt added with purple sweet potato, and viable cell counts of all samples were above 9.08 log cfu/ml. Viscosity of yogurt added with purple sweet potato(36,800∼46,000 centipoise) was higher than that of yogurt added with only skim milk powder(32,200 centipoise). The overall sensory score of yogurt added with purple sweet potato(38.6%, dry base) was the best of tested yogurt. The major organic acid of yogurt added with purple sweet potato was lactic acid. its content was 0.997∼1.203%. malic acid, succinic acid, oxalic acid, and fumaric acid were analyzed out a little. Lightness and yellowness decreased by addition with purple sweet potato but redness increased. Total color difference($\Delta$E) with yogurt addition with purple sweet potato and only skim milk powder were very high(above 11.46).
The characteristics of cookies added asparagus (Asparagus officinals L.) powder were analyzed by chemical and sensory evaluation. Samples were prepared with different levels (0, 0.5, 1, 2, 3 and 5%) of freeze-dried asparagus powder. The lowest pH of the cookie dough was pH 6.26 in the 5% asparagus powder added group. Density value of cookie dough was decreased by increase of asparagus powder addition volume. Spread factor and hardness of cookie was significantly increased by addition of asparagus powder. And hardness was the highest in 5% asparagus powder added cookie, however there was no remarkable different between 0.5~1% added group and control. Hunter color L and a-value of dough was decreased significantly, while b-value was increased when concentration of asparagus powder was added greater than 3%. L-value of cookie was significantly decreased with larger of asparagus powder addition volume and the lowest in the 5% asparagus powder added group (55.38). Hunter a-value of cookie showed not significantly differences in all groups. The sensory evaluation was not observed significantly differences by terms of color (3.77~4.77), brittleness (4.11~4.88), flavor (3.88~4.55), taste (4.11~5.00) and overall acceptability (4.00~4.77). From these results, we suggest that asparagus powder addition is possible up to 5% and is good ingredient for increasing the acceptability and functionality of cookies.
This study was carried out to investigate the acceptable ratio of Sulgidduk with added soybean curd residue powder. The moisture content of Sulgidduk with added soybean curd residue powder (0${\sim}$ 10%) ranged from 40.54 ${\sim}$41.38%, and there were no significant differences between the addition of soybean curd residue powder and control. There were also no significant differences in swelling power and pore ratio from control to the addition of 4% soybean curd residue powder. However, these decreased with increasing addition of soybean curd residue powder of more than 6%. The L (lightness) value decreased with increasing addition of soybean curd residue powder, but the a (redness) and b (yellowness) values increased significantly. As the amount of soybean curd residue powder increased, the hardness, cohesiveness, springiness and gumminess decreased, and, the decrease was especially significant with addition of more than 6%. With increases in the storage period, the hardness, springiness and gumminess increased, while cohesiveness decreased for all additions of soybean curd residue powder. In sensory evaluations, Sulgidduk with the addition of 4% soybean curd residue powder was the most preferred with regard to overall quality. These results indicated that the Sulgidduk with 2% and 4% added soybean curd residue powder exhibited the best quality.
This research is to figure out the manufacture proper1ies and the effect of adding red ginseng powder into cookies. When adding red ginseng powder into wheat, there was no significant change in moisture content while the amount of WRC and AWFC increased significantly. In the manufacturing and quality characteristics, there was no noticeable change in thickness and spreadability. Also, wheat cookies containing red ginseng powder didn't show significant differences either and the control plot had the biggest diameter. The change of chromaticity showed that L-value and b-value seemed to significantly decrease while a-value increased a lot In other words, the more ginseng powder was added, the darker its external colour became. In the organic characteristics, the control plot showed the best result in volume, crust, top grain and in almost every part. The volume had the most satisfying result with 6% of red ginseng powder added, and there was not much difference among the groups added with red ginseng powder. Generally, adding up tp 12% of ginseng powder was found best when making cookies.
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