• Korean Journal of Food Science and Technology
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• v.33 no.3
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• pp.353-360
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• 2001

Physicochemical characteristics of kochujang prepared with addition of garlic and onion, were investigated for 22 weeks of fermentation to obtain information on improving the quality of traditional kochujang. Moisture contents of kochujang increased during fermentation, but total nitrogen contents decreased slightly. The pH and titratable acidity of kochujang changed a little by addition of garlic or onion. Total sugar contents of kochujang decreased rapidly after 4 weeks, but reducing sugar contents increased until 2 weeks of fermentation. As the ratio of garlic increased, reducing sugar contents decreased. Ethanol contents increased during fermentation as mixing ratio of onion increased. Amino nitrogen contents of kochujang increased as mixing ratio of garlic or onion increased, but ammonia nitrogen contents decreased. Water activities of kochujang decreased slightly during fermentation, but consistency increased until 18 weeks. The color values of garlic or onion added kochujang were low in the L-values, but a- and b-values increased. Results of sensory evaluation showed garlic added$(2{\sim}4%)$ kochujang were more acceptable than onion added kochujang due to more favorable taste and flavor.

• Korean Journal of Food Science and Technology
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• v.16 no.1
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• pp.1-6
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• 1984

The three kinds of Kochujang were prepared with liquid koji equivalent to 30%, 50%, and 70% of brewing water. The qualities of the Kochujangs during aging at $25^{\circ}C$ for 4 months were compared with those of the control group which was made from solid koji. There were no significant differences in the contents of moisture, crude protein, crude fat, NaCl and ethyl alcohol between test groups. The contents of amino nitrogen, soluble nitrogen, reducing sugar and pH of each test group during Kochujang aging were high in the order of control group. 70% liquid koji group, 50% liquid koji group and 30% liquid koji group. The pH of control group was over 5.0 during aging period. The titratable acidity of Kochujang was high in the 50% liquid koji group and the 30% liquid koji group.

• Korean Journal of Food Science and Technology
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• v.22 no.3
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• pp.357-362
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• 1990

Soy yoghurt was prepared from 19 soybean cultivars with the use of L. acidophilus KCTC 2182. Various characteristics of fermented soymilk and the ratio of product recovery in soy yoghurt were investigated The mean crude protein content of the soy yoghurt was 2.74% with a range of 2.58-2.91% and the mean crude fat content was 1.49% with a range of 1.34-1.85%. Total solids recovered from original soybean in soy yoghurt ranged 52.14-61.54% with a mean value of 56.17%. Crude protein recovery in soy yoghurt ranged 59.22-67.5% with a mean value of 63.32%, Crude fat ranged 65.8-86.02% with a mean value of 72.57%. Titratable acidity of soy yoghurt ranged 0.20-0.41%. Viable cell count of soy yoghurt ranged $3.83{\times}10^8-3.22{\times}10^9/ml$ and the amount of separated whey ranged 1.4-8.2ml per 100ml of soymilk.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.48 no.3
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• pp.284-292
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• 2015

We explored preprocessing-mediated quality changes in red snow crab fish sauce. A control (C) group and groups treated with autolysis (A), boiling (B), enzymatic hydrolysis (E), and addition of Aspergillus oryzae (K) were formed. The titratable acidity of the K group increased with storage time, whereas that of groups C, A, B, and E decreased. The total and amino nitrogen contents initially increased on storage of all samples, but decreased in later periods. The total plate count (TPC) of the K group was initially 5.26 log CFU/mL and increased to 7.28 log CFU/mL at 3 months of storage. The TPCs of the C, A, B, and E groups were initially <5.00 log CFU/mL and decreased with storage. The lactic acid bacteria count of the K group was initially 4.80 log CFU/mL and increased until month 5 to approximately 6.06 log CFU/mL. The K group scored higher in terms of sensory attributes than the other groups and maintained marketable scores for all relevant properties (color, flavor, off-odor, and overall acceptance). Furthermore, the free amino acid content of the K group was the highest among all groups at approximately 3,000 mg per 100 g. These results suggest that K treatment may be beneficial in the preparation of fermented fish sauce.

• Food Science and Preservation
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• v.19 no.5
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• pp.652-658
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• 2012

This study, the changes in physicochemical properties and hesperidin content of Jeju-processed citrus fruits according to the harvest date were evaluate. The soluble-solid content, pH, and soluble solid-acid ratios gradually increased, but titratable acidity slightly decreased with a delay in the harvest date. The color index, lightness, yellowness, and turbidity slightly decreased whereas the redness slightly increased with a delay in the harvest date. The hesperidin content slightly decreased with a delay in the harvest date. Hesperidin, which is the major cause of juice cloudiness, decreased with a delay in the harvest date. These results suggest that later-harvested fruit juice is bound to be less cloudy.

• Journal of the East Asian Society of Dietary Life
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• v.24 no.6
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• pp.827-836
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• 2014

In this study, the effects of Mulberry leaves extract (ME) addition on the quality of Kimchi was investigated during 30 days of fermentation at $5^{\circ}C$. ME was added to salted cabbage at concentrations of 0% (C), 0.4% (ME1), 0.8% (ME2) and 1.2% (ME3) (w/w). The pH of Kimchi added above 0.8% ME was higher than that of Kimchi without ME after 12 days of fermentation. During overall fermentation, the titratable acidity of Kimchi with 1.2% ME remained at the lowest level. The degree of salinity decreased with increasing amount of added ME, whereas control groups showed the highest salinity. In L, a and b values of samples, the highest Figures of L and b were observed in control groups, and ME3 showed the highest value of a. In addition, the cutting force during the fermentation period was higher in all treated groups compared with control groups, and ME3 showed the highest hardness value. Moreover, growth of lactic acid bacteria and total bacteria were inhibited by addition of ME. In the sensory assessment, 0.4% ME improved the quality of Kimchi, showing the highest taste score and overall preference. Therefore, addition of 0.4% ME appears to be an acceptable approach to enhance the quality of Kimchi without reduction of acceptability.

• Journal of the East Asian Society of Dietary Life
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• v.18 no.1
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• pp.104-110
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• 2008

This research was designed and implemented to evaluate how the composition of yaksuncha can affect the health of individuals suffering from diet-related diseases such as obesity and hyperlipidemia by prescribing Yaksun as a nutritional supplement with daily meals. The yaksunucha was prepared as Koekac, Sansa, Heshouwu and Woolong tea and the tea's effects on serum lipids and oxidative stress were evaluated by clinical procedures. The yaksuncha significantly increased HDL-cholesterol and decrease of LDL-cholesterol concentrations in serum. It also had significant effects on decreasing oxidative stress and homocystein levels. The physical characteristics of the yaksunucha were also examined, showing. Brix, pH and titratable acidity values of 1.4, 5.50 and 0.05% respectively. It is thought that scientific and objective evaluations were completed on the components of the yaksuncha prescription. Thus one can concluded that the components could be applied not only in the form of tea, but also various food. The data derived from this study provides basic information that will aid in the application of oriental medicinal resources to other foods as well as facilitate the study of medicinal herbs within the field of functional food research, which already draws sizable attention worldwide.

• Food Science and Preservation
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• v.11 no.4
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• pp.472-477
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• 2004

This study was carried out to investigate the effect of liquid calcium(LC) on the quality of kimchi during fermentation. LC retarded the decreasing rate of pH and the increasing rate of titratable acidity during fermentation at $10^{\circ}C$, and the effect was more conspicuous at $7.0\%(v/w)$ than at $3.5\%(v/w)$ in each LC type. Microbial counts of total and lactic acid bacteria were lower in LC added kimchi than control before 8 days but higher in LC added kimhi after 8 days. Changes in color of a value were gradually increased, but L and b value were decreased. Calcium content of added LC on kimchi; A concentration $3.5\%(v/w),\;7.0\%(v/w)$ were $103{\sim}110\;mg\%,\;145{\sim}163\;mg\%$ and B concentration $3.5\%,\;7.0\%$ were $140{\sim}151\;mg\%,\;210{\sim}220\;mg\%$.

• Food Science and Preservation
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• v.9 no.1
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• pp.51-55
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• 2002

Changes in food components of oyster mushroom Kimchi were investigated during storage at 20$^{\circ}C$. The pH of raw oyster mushroom Kimchi (ROMK) was higher than that of Chinese cabbage Kimchi (control) at initial stage, but it was lower than that of control after 1 day of storage. pH of blanched oyster mushroom Kimchi (BOMK) was slightly higher than that of controls The titratable acidity of oyster mushroom Kimchi was in inverse state to the pH. Amino acid nitrogen content of Kimchi tended to increase during storage, the content of ROMK was higher than that of control, the content of BOMK was not different from that of control. The reducing sugar content of Kimchi decreased significantly during storage, the content of ROMK was higher than that of controls the content of BOMK was slightly lower. The bacterial number of control increased rapidly at 2 days fermantation and reached plateau afterward. The number of ROMK tended to he alike that of control during storages the number of BOMK was fewer than that of control. On the taste panel of Kimchi after 1 day of storages ROMK obtained higher score than BOMK but the score was lower than control.

• Food Science and Preservation
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• v.9 no.2
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• pp.189-193
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• 2002

This study was conducted to evaluate the quality and the quantity for manufacturing vinegar powder using spray drying. The $\beta$-cyclodextrin(CD) and gum arabic(GA) were used as well materials and the mixing ratio of CD and GA was ranged from 10:0 to 0:10. The moisture content of the vinegar powder of 2.5 of CD and 7.5 of GA was lowest among the other mixing ratios. At this proportion, the titratable acidity was highest as it had much included vinegar. The heat stability was not varied much with mixing ratio. However the stability of heat was maintained. Further the water absorption of powder was comparatively low. The manufactured powder vinegar shape was smooth round particles and stable structure by SEM and the particle size was small enough to form capsulation. In sensory evaluation, under these conditions the sourness was highest at 3.5. Therefore, the optimal mixing ratio at 2.5 of CD and 7.5 of GA in wall material was selected.