• Journal of the Korean Society of Food Science and Nutrition
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• v.20 no.6
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• pp.565-571
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• 1991

A short time microwave heat treatment, bringing in hot NaCl solution, addition of KCI, CaCl2, MgCl2 into brining solution and salts mixture of phosphates into half fermented dongchim were investigated for their effects on some quality of dongchimi, a Korean pickle of Chinese radish roots, during fermentation. The reference dongchimi was prepared by brining the radish roots in 7% NaCl added with seasonings at $25^{\circ}C$. The result showed that microwave heat treatment affected little on the pH or total acidity change during fermentation. Soaking the roots in 80-9$0^{\circ}C$ hot salt solution significantly reduced the fermentation and softening rate of dongchimi while a rather rapid fementation was found for those soaked in 7$0^{\circ}C$. Addition of KCI and CaCl2 into brining solution slowed the pH decrease and softening of the roots, respectively. The dangchimi added with the salts mixture of phosphate, citrate and nitrite was significantly extreneded the fermentation time to pH 4.0 by more than two folds.

• Applied Biological Chemistry
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• v.34 no.3
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• pp.225-230
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• 1991

In this study, several combined effect of KCl addition into bring solution, microwave heating of Chinese radish for 3 minutes and addition of two salt mixtures into half fermented Kakdugi were investigated to compare their improving effects of storage stability of Kakdugi, Kakdugi was prepared by salting in 15% NaCl solution for 2 hours and fermented at $25^{\circ}C$ and determined for the changed in pH, total acidity and reducing sugars. It was found from the result that the combined method of salts addition and heating treatment improved the storage stability by 6.4 folds based on pH change where salts mixture of phosphated, Ca EDTA, and Sod. citrate contributed the most effect. Changed in reducing sugar were greatly reduced by salt mixture addition while microwave heating and KCl addition affected little. Storage of Kakdugi at $4^{\circ}C$ after preparation with combined method could extend the storage life more than 8 folds of those Kakdugi stored at $25^{\circ}C$. However total acidity showed higher values for those prepared by combined method and stored at $4^{\circ}C\;or\;25^{\circ}C$.

• Journal of the Korean Society of Food Science and Nutrition
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• v.24 no.5
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• pp.758-764
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• 1995

A survey on the kimchi preference among elementray school students in Pusan was conducted in April of 1995 to get basic information needed for the development of special kimchi for the children. Total of 1100 children in 2nd, 4th and 6th grade from public and private elementary school participated in this survey. Sixty eight percent of students answered that they like kimchi. However, kimchi preference(17.6%) among other side dishes-pork cuttlet.ham.sausage(54.1%), egg roll(9.4%), soysauced beef(8.2%), toasted laver(6.3%), bean sprout namul(3.0%), danmooji(1.0%), and squash namul(0.4%)-was relatively low. It can be interpreted that elementary school student prefers processed food specially animal food to kimchi. The hot taste of the kimchi was the number one reason of their dislike of kimchi, and it was the most important reason for those also like kimchi. Thus it can be thought as the representative taste of kimchi. Chinese cabbage kimchi was found to be the most favorite kimchi and kakdugi(seasoned pickles of cubed radish), nabak-kimchi(mildly seasoned water based kimchi that is mixture of chinese cabbage and cubed radish) and jchonggag kimcchi(seasoned pickles of pony tail radish) and cucumber kimchi were followed in order. Among the various ingredients in kimchim children like cabbage best but they didn't like galic, ginger, green onion and fermented fish sauce which give strong flavor in kimchi.

• Korean journal of food and cookery science
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• v.16 no.6
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• pp.557-567
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• 2000

An optional ingredient, jasoja(Perillae semen), was adopted to improve the quality of Dongchimi. The final weight percentage of jasoja in Dongchimi was adjusted to 0, 0.25, 0.5, 0.75, or 1.0%, per radish, and sensory and microbiological characteristics were determined during fermentation at 10 for 45 days. The effect was varied depending on the amounts of jasoja, but Dongchimi fermented with 0.5% jasoja was most favored for color, flavor, taste, texture, and overall acceptability in sensory evaluation. According to a quantitative descriptive analysis for the product, the liquid portion of Dongchimi steadily became clearer and less sour in proportion to the amount of added jasoja. However, a strong off-taste was detected from 1.0% treatment. The viable cell numbers of total and lactic acid bacteria drastically increased during the first 2 days, and then gradually increased to their maximum values during fermentation and slowly decreased at the later stage. Dongchimi with 0.5% treatment showed a distinctive high number of microorganisms at the 15th-day of fermentation and this trend was maintained until the completion of fermentation. The lactic acid bacteria isolated and identified from Dongchimi were; Lactobacillus brevis, Lactobacillus plantarum, Leuconostoc mesenteroides, Lactococcus faecalis, and Lactococcus lactis. The combined number of Lactobacillus brevis and Lactobacillus plantarum began to increase right after preparation to as much as 10$\^$7/CFU/㎖, then decreased to 10-10$^3$CFU/㎖ afterward. This study showed that the addition of jasoja retarded the initial fermentation of Dongchimi; however, too much jasoja at above 1% weight level per Chinese radish might accelerate fermentation at the later fermentation stage and shoud be avoided. A comparable fermentation pattern was observed among the samples; however, more acceptable Dongchimi could be prepared by fermenting for 11 to 30 days at 0.5% jasoja concentration per radish.

• Journal of the Korean Society of Food Science and Nutrition
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• v.26 no.6
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• pp.993-997
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• 1997

This study was carried out to investigate the antioxidative effect of different kinds of kimchi on the lipid oxidation of cooked meat in model systems. Model systems of cooked ground meat(CGM), CGM-Chinese cabbage kimchi(CK), CGM-radish kimchi(RK), and CGM-mustard leaf kimchi(MLK) were prepared and their oxidation were evaluated during the storage at 4$^{\circ}C$ for 5 weeks. Thiobarbituric acid(TBA) values of CGM significantly increased with the storage at 4$^{\circ}C$ for 5 weeks. Thiobarbituric acid(TBA) values of CGM significantly increased with the storage time, however, TBA value of CGM-CK, CGM-RK, and CGM-MLK lowered and that of CGM-MLK was lowest. Antioxidative effect of CGM-MLK increased with the addition levels of kimchi in the system. And also in the model systems which were prepared with CGM and MLK in different fermentation periods, the antioxidative effect was highest in the properly fermented-kimchi.

• Journal of the Korean Society of Food Science and Nutrition
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• v.26 no.5
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• pp.800-806
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• 1997

Effect of temperature on Kakdugi during fermentation was investigated by measuring sensory, physicochemical and microbiological, properties up to 57 days. The diced(2.5$\times$2.5$\times$2.5cm) Chinese radishes(Ra-phanus sativus L.) with other ingredients were fermented under the different temperatures. Kakdugi were stored at 4$^{\circ}C$ after keeping at 2$0^{\circ}C$ for 12 hours(treatment E) from initial fermentation to the end at each temperature on preparation. The pH was decreased to the range of 4.14~4.29 in the initial of pH 5.8, and total acidity was increased 2~4 times more than that of in the initial period (0.24%). And the changes of treatment A, B, and C were nearly constant up to 57 days in the range of 0.80~0.88% (pH 4.1). The changes of vitamin C showed sigmoidal curve, increasing significantly in the palatable period after decreasing gradually in the initial period. The content of vitamin C in treatment E was rapidly decreased, but that of treatment C was kept high content up to 57days. the number of lactic acid bacteria was remarkably increased in palatable period and was gradually decreased thereafter. The scores of aroma, taste, overall acceptability in sensory evaluation during the fermentation was high in order of treatment E, C, D, B and A. The scores of sensory evaluation treatment D and E during fermentation was rapidly decreased, however, treatment A, B and C were maintained. Changes of lactic acid bacteria, and sensory properties, among treatment A, B and C which kept a good quality up to 57 days, had high scores of sensory evaluation, abundant vitamin C in the palatable period. The result showed that Kakdugi fermented at 4$^{\circ}C$ after keeping at 2$0^{\circ}C$ for 36 hours had better taste and quality than those of other treatments.

• The Korean Journal of Food And Nutrition
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• v.11 no.5
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• pp.513-520
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• 1998

A survey of the notion and intake on Kimchi among college women in Pusan was conducted to get some basic information on kimchi. Two hundred sixty seven students in Pusan participated in this survey. Seventy five percent of students answered that they like kimchi. They preferred well-fermented kimchi with anchovy extracts, refreshing taste and crispy texture the saltly and sweet. Chinese cabbage kimchi (87.6%) was found to be the most favored kimchi and Kakdugi(seasoned pickles of cubed radish), Nabak kimchi and Chonggak kimchi (ponytail kimchi) were followed in the order. The most favorite food made from kimchi was stir fried kimchi with rice. They disliked traditional special kimchi, such as Puchu kimchi (leek kimchi), Pa kimchi (green onion kimchi), Kkennip kimchi (perilla leaf kimchi), Godulbaegi kimch (Korea wild lettuce kimchi) and Gat kimchi (Leaf mustard kimchi). About 93 grams of kimchi was consumed daily and this amount was a little. Seventy percent of students did not have any experiences preparing kimchi. Experiences of kimchi preparation were given by mother through kimchii-making event for the winter(71.7%), cooking practice in middle or high school (14.1%) and college(10.9%) and general cooking education (33%). They preferred to buy kimchi at the Agricultural Cooperative Association (48.5%) or a large kimch factory (32.75). College students believe that kimchi is a healthy food and are willing to learn how to make kimchi.

• Korean Journal of Food Science and Technology
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• v.23 no.3
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• pp.267-271
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• 1991

The chemical and organoleptic properties of dongchimi studied for their changes during fermentation at $4{\sim}35^{\circ}C$ in 7% NaCl solution with seasonings. It was found that pH decrease showed three variation points in its slope at about pH 5.2, 4.7 and 4.1 during fermentation. A negative linear relationship between total acidity and logarithmic value of pH was obtained. The slope of the relationship curve was increased as the fermentation temperature increased. The reducing sugar was increased until pH reached$4.0{\sim}4.2$ followed by a small decrease and its amount was lowered as the temperature increased from $4\;to\;25^{\circ}C$ The major nonvolatile organic acids were lactic and citric acids. The increase in lactic acid were more marked at $25^{\circ}C$ than at $4^{\circ}C$. As fermentation proceeded the fresh radish odor significantly decreased while sourness and yeast-moldy odor increased. The crispness of the radish decreased slightly during fermentation.

• Journal of the Korean Society of Food Science and Nutrition
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• v.38 no.6
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• pp.732-741
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• 2009

This study was carried out to identify lactic acid bacteria isolated from commercial Kimchi. Twelve lactic acid bacteria strains were isolated from Chinese cabbage kimchi (Baechu kimchi) that was fermented for 4 days at room temperature after making kimchi, 6 strains from pickled ponytail radishes (Chongkak kimchi) that was fermented for 2 days, and 15 strains in radish cube kimchi (Kaktugi) that was fermented for 5 days, and 23 strains were isolated in pickled Wakegi (Pa kimchi) that was fermented for 4 days. Eight strains among the lactic acid bacteria of 12 strains isolated from Baechu kimchi (pH 4.0) were identified as Lactobacillus plantarum, 1 strain as Leuconostoc lactis, 2 strains as Lactobacillus casei subsp. pseudoplantarum, and 1 strain as Lactobacillus sake. Three strains among the lactic acid bacteria of 6 strains isolated from Chongkak kimchi (pH 4.5) were identified as Leuconostoc paramesenteroides, 2 strains as Leuconostoc mesenteroides subsp. mesenteroides, and 1 strain as Lactobacillus plantarum. Two strains among the 15 strains isolated in Kaktugi (pH 4.0) were identified as Leuconostoc lactis, 3 strains as Leuconostoc mesenteroides subsp dextranicum, 4 strains as Lactobacillus casei subsp. pseudoplantarum, and 4 strains as Lactobacillus coryniformis subsp. torquens. Twenty-two strains among the 23 strains isolated from Pa kimchi (pH 4.1) identified as L. plantarum and 1 strain was as Lactobacillus sake. From the results above, the dominant species of Baechu kimchi was confirmed as L. plantarum, Chongkak kimchi as L. paramesenteroides, Kaktugi as L. casei subsp. pseudoplantarum and L. coryniformis subsp. torquens, and Pa kimchi as L. plantarum.

• Korean journal of food and cookery science
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• v.20 no.1
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• pp.86-94
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• 2004

The purpose of this study was to investigate the changes of hardness and microstructure of Dongchimi cooked with various source of water(distilled water, purified water, Cho Jung Carbonated Natural water). This study was conducted to observe the changes of pH, total acidity, salt content, turbidity, texture and microstructure. Dongchimi cooked with source of water of water was fermented at 10$^{\circ}C$ for 46 days. The changes of pH on Dongchimi cooked with various source of water decreased in all samples during fermentation period, and then showed a slowly decrease after 12 days of fermentation. The total acidity of Dongchimi cooked with Cho Jung Carbonated Natural water was arrived slowly at best tasting condition 0.3 ∼ 0.4 point compared with other conditions. So Dongchimi cooked with Cho Jung Carbonated Natural water was continued to the best tasting condition for end of fermentation. At early stage of fermentation, the changes of turbidity of Dongchimi used Cho Jung Carbonated Natural water showed highly as compared with other test condition for 12th days of fermentation. The maximum cutting force of chinese radish of Dongchimi showed the highest value among all at the 25th day of ripening and then decreased gradually. The maximum cutting force of chinese radish of Dongchimi used Cho Jung Carbonated Natural water was the highest compared with other conditions at 25th day of fermentation. The calcium content of Dongchimi juice used Cho Jung Carbonated Natural water was observed hish at the early stage of fermentation and showed the highest value at 25th day of ripening. The calcium content of chinese radish and Dongchimi juice of Dongchimi cooked with water purifier was lower than that of Dongchimi cooked with Cho Jung Carbonated Natural water, and was higher than that of Dongchimi cooked with Distilled water at the early stage of fermentation. The magnesium content in all samples increased gradually from the early stage of fermentation. The microstructure showed disintegration appearance of middle lamella and cell wall during fermentation period.