• Korean journal of food and cookery science
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• 제4권1호
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• pp.59-63
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• 1988

The changes of acidity, the content of alcohol-insoluble solid (AIS) and pectic substances of Kimchis which were prepared with various garlic contents and fermentation at $21^{\circ}C$ were investigated. Acidity and the content of water soluble pectin of Kimchis increased but the content of AIS and protopectin decreased during the fermentation. As the Kimchis contained high garlic contents compared with the Kimchis deleted garlic, acidity of those rapidly increased but the content of AIS of those slightly decreased with fermentation. In the case of Kimcltis contained high garlic contents, protopectin decreased and water soluble pectin increased with fermentation, but the amount of changes was small.

• Korean Journal of Food Science and Technology
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• 제9권2호
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• pp.116-122
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• 1977

The volatile flavor components of Kimchis were identified and the volatiles of fermented Kimchis (1.29% NaCl and 4.89 NaCl) were compared with those of raw Kimchi (1.29% NaCl). After the existence of carbonyls and sulfur compounds were confirmed by precipitation method, vacuum distillation was carried out to collect the volatiles of Kimchis in traps submerged in ice+salt, dryice-acetone and liquid N, respectively. The volatile flavor components were identified by GLC. The results were; 1. 17 volatile flavor components of Kimchis were identified by comparison of retention time with those of known compounds and acetaldehyde, acetone, ethanol, ethyl sulfide were positively identified by m.p., IR, UV, TLC. etc. 2. Ethanol was the most abundant volatiles of Kimchis and the content was much higher in fermented low salt Kimchi than in unfermented low salt Kimchi. 3. On the contrary, acetaldehyde and volatile sulfur compounds were reduced in fermented Kimchis, especially in fermented low salt Kimchi.

• Journal of the Korean Dietetic Association
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• 제8권2호
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• pp.154-162
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• 2002

This study was performed in order to measure consumed quantity of garlic and its content in each meal. Statistical data analysis was performed utilizing SAS package program. The results of this study can be summarized as followed ; 82% of foodservice surveyed has served garlic seasoned with soy sauce or vinegar etc. Kimchis was included in each meal in 98% of them and only 13.7% of them served Kimchis made by themselves. The Unit price of meal makes significant differences in the number of side dishes and the serving frequency of beverages and rice cakes. The content of garlic in meal were 2.6g in Soups, 2.9g in Stews, 1.9g in Namuls, 2.4g in Panbroiled foods, 3.0g in Hardboiled foods, 4.0g in Smothered dishes, 3.7g in Kimchis, respectively. Consumed garlic quantity makes significant differences by unit price of meal and consumption style of Kimchis(p<0.05).

• KSBB Journal
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• 제11권2호
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• pp.181-185
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• 1996

A considerable amounts of mannitol were accumulated during the fermentation of Kimchis. When several oligosaccharide including fructo-, soybean-, and isomaltooligosaccharides were added during the preparation of Kimchi as beneficial ingredient respectively, fructooligosaccharides (at $25^{\circ}C$) and soybean-oligosaccharides (at $35^{\circ}C$) significantly increased the amounts of mannitol accumulation, while isomalto-oligosaccharides exerted no effect at all fermentation conditions examined. This result were caused by no appearance of microorganisms which have the capability of utilizing isomalto-oligosacsharides during fermentation period. Isomalto-oligosaccharides can be recommended as an effective ingredient of Kimchis because both oligosaccharides and mannitol that have favorable functionalities were simultaneously contained. However, so as to enhance the cooling taste of Kimchis by increasing the content of mannitol, fructo- and soybean-oligosaccharides are rather favorable.

• Journal of the East Asian Society of Dietary Life
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• 제13권6호
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• pp.601-607
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• 2003

This study was attempted to investigate the physicochemical changes during soybean-leaf water kimchis fermentation by adding wheat flour in cooking water. Soybean-leaf water kimchis with five different levels of wheat flour in cooking water(0%;A, 5%;B 10%;c, 15%;D, 20%;E) were tested for rhological parameters, fine structural changes, sensory evaluations and chemical analysis. The composition of the soybean-leaf was moisture (80.9%), protein(6.8%), fat(0.6%), ash(2.1%) and alkalinity (+14.9). The amount of reducing sugars of sample A and other samples were 0.75% and 1.08∼1.4% in the initial fermentation stage, but decreased to 0.3 and 0.43∼0.50% in the later fermentation stage, respectively. The pH of sample A decreased from 5.17 to 4.72 during the initial fermentation. On sample B, C, D and E, pH's decreased rapidly during the initial fermentation, but they did not change much in the later fermentation stage. The pectin contents of all samples decreased during 2nd and 4th day of fermentation, then the change was slow. The amount of hemicellulose. cellulose and lignin in terms of the DNF and ADF were varied from 4 to 33%, but the contents of them did not greatly changed during the fermentation. The sensory evaluation showed that both B and C samples had the good score in sweety taste, roasted nutty taste, and the ease of swallowing measured as chewiness. From these results, the optimum soybean-leaf water kimchis can be prepared when 200g soybean-leaf, 1000$m\ell$ water, 15g garlic, 3% red pepper powder and 5 ∼0% wheat flour were fermented at 20$^{\circ}C$ for 2 days.

• Preventive Nutrition and Food Science
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• 제4권4호
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• pp.241-245
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• 1999

The potential of hydroponic cultivated Chinese cabbage as a kimchi material was evaluated. The hydroponic-grown (HG) Chinese cabbage was heavier in weight, taller in height, wider in width, but less in number of leaves compared with the field-grown (FG) Chinese cabbage. The former showed higher contents of calcium, iron, vitamin A and niacin, and lower lipid and vitamin C than the latter. During fermentation of 28 days at 1$0^{\circ}C$, FG and HG kimchis showed comparable pH and acidity values, besides that the FG and HG kimchis showed a pH value of 4.2 and 4.0, respectively, at the 14th day. The FG kimchi showed higher numbers of total microbes as well as total and typical lactic acid bacteria than the HG kimchi at the 7th day. However, both kimchis did not show any difference at 14th day. There was no significant difference in the {TEX}$L^{*}${/TEX} value between FG and HG kimchis. However, HG kimchi showed a more reddish hue than FE kimchi between the 7th and 14th day of fermentation. In sensory evaluation, the HG kimchi revealed a slightly more sour taste and a less crispy texture than the FE kimchi at the 14th day. However, both kimchis did not show any difference in overall quality until the 21st day of fermentation.

• Korean journal of food and cookery science
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• 제2권1호
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• pp.54-58
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• 1986

The changes of acidity, hardness, and pectic substances of Kimchis fermented at 6-1$0^{\circ}C$ and 22-24$^{\circ}C$ were investigated. With fermentation, acidity was increased and hardness was decreased, and these changes were more marked in Kimchis fermented at 22-24$^{\circ}C$. The contents of AIS was decreased with fermentation. Hot water soluble pectin was increased and protopectin was decreased with fermentation, but the amount of changes was small.

• Journal of the Korean Society of Food Science and Nutrition
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• 제38권8호
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• pp.996-1002
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• 2009

This study was carried out to improve quality and increase anticancer effect of baechu kimchi by changing various kinds of salt. The baechu cabbages were brined with purified salt (P), natural sea salt (NS), natural sea salt without bittern (NS-B) or baked (Guwun) salt (G) and mixed with other ingredients. Thereafter, the kimchis were fermented for 7 days at $15^{\circ}C$. The changes in pH and acidity of the P and G kimchis were slower than those of NS and NS-B kimchis. NS-B and G kimchis promoted the growth of Leuconostoc sp.; however, it inhibited the growth of Lactobacillus sp. when compared with P and NS brined kimchis. The sensory evaluation results indicated that NS-B and G kimchis were better than P and NS kimchi in taste, color and overall acceptability. Rheological property of texture (cutting strength) of NS-B and G brined kimchis was also much better. Anticancer effects of the kimchi juices and methanol extracts were investigated on AGS human gastric adenocarcinoma cells and HT-29 human colon carcinoma cells by MTT assay. NS-B and G kimchis significantly retarded the growth of both cancer cells compared to P and NS kimchis. From these results, kind of salt is very important when kimchi is prepared. It proved that removing bittern from natural sea salt is good ancient tradition when brining the cabbage. Using the baked salt is also a better method to improve the quality and anticancer effect of kimchi.

• Korean journal of food and cookery science
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• 제22권5호통권95호
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• pp.600-608
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• 2006

The purpose of this study was to investigate the physicochemical characteristics of Cabbage Kimchi with different kinds of jeot-kal. The Cabbage Kimchis were stored at 4${\pm}$1$^{\circ}C$ for 49 days. The pH of all samples of Cabbage Kimchis decreased during fermentation. The total acidity of Cabbage Kimchis increased gradually during fermentation and that of Cabbage Kimchis with different kinds of jeot-kal was higher than that of control. Redox potentials and reducing sugar content decreased gradually during fermentation. Total vitamin C content of Cabbage Kimchis with different kinds of jeot-kal was much higher than that of control. In color measurement, the lightness value decreased gradually, whereas the redness and yellowness values increased gradually during fermentation. The content of hot water soluble pectin (HWSP) decreased as the fermentation proceeded, but that of hydrochloric acid soluble pectin (HCISP) and sodium hexametaphosphate soluble pectin (NaSP) increased.

• Preventive Nutrition and Food Science
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• 제11권3호
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• pp.184-190
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• 2006

Young radishes (YR, yeolmu in Korean) were cultivated in soil with and without sulfur. Control YR-kimchi and sulfur YR-kimchi were prepared using the young radishes cultivated in the soil without and with 1,818 $g/m^3$ sulfur, respectively. Fermentation of the YR-kimchis were conducted at $5^{\circ}C$ for 6 weeks. The control and sulfur YR-kimchis were reached pH 4.39 and pH 4.31 with 0.98% and 1.04% acidity at 5 weeks, respectively. At a higher concentration of 20 ${\mu}L/assay$, the sulfur YR-kimchi juice exhibited higher inhibitory effects (84%) on the growth of HT-29 human colon cancer cells than the control YR-kimchi (57%). Methanol extract from the YR-kimchis also led to similar results to those of the juices. In the inhibition study by hematocytometer, YR-kimchis inhibited the growth of cells in a time-dependent manner. Sulfur YR-kimchi induced apoptosis as determined by 4,6-diamidino-2-phenylindole (DAPI) staining and decreased Bcl-2 expression of active anticancer compounds, when compared to the control YR-kimchi. These results suggested that preparing kimchi using YR cultivated in the presence of sulfur, which can help to synthesize active compounds, could increase the anti-cancer activity of sulfur YR-kimchi.