• Journal of the Korean Society of Food Culture
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• v.17 no.3
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• pp.267-274
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• 2002

The quality characteristics of traditional Kyungsangdo Myungtae (Alaska pollack) sikhae including optimal composition of the product were investigated. In the sensory evaluation, the Myungtae sikhae made from Gampo accepted to be best for traditional Kyungsangdo Myungtae sikhae and it is called standard sikhae. The standard sikhae was prepared as follows: dried-Myungtae 200g, cooked rice 230g, red pepper 92g, garlic 112g, ginger 100g, radish 1.6kg, salt 20g, and malt meal 65g. The Myungtae sikhae made from Gampo showed higher values in total sugar, free reducing sugar, and nitrogen compounds than the Myungtae sikhae made from another locations. The sugar of standard sikhae consisted of four kinds including glucose. And, the contents of free amino acid was increased in the order of glutamic acid, alanine, and methionine. The composition of free amino acid in Myungtae sikhae contained 17 kinds, and the contents was increased in order of glutamic acid, aspartic acid, and proline. The organic acid of standard Myungtae sikhae consisted of 7 kinds including lactic acid during fermentation. The contents of citric acid, succinic acid, and lactic acid gradually increased during fermentation, and especially, increasing of lactic acid remarkably increased than the different organic acid.

• Korean Journal of Food Science and Technology
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• v.35 no.1
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• pp.111-114
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• 2003

Conjugated linoleic acid (CLA), known to possess various beneficial effects such as anticarcinogenic, antioxidative, and cholesterol-depressing, has been used as a health supplementary food in Japan and the USA. Optimum condition for CLA production without causing changes in quality of kimchi was determined using Bifidobacterium sp., a CLA-producing microorganism, as a starter in culture broth, freeze-dried culture, and encapsulated culture. Results revealed encapsulation was most ideal for maintaining the ability of bacterium to produce CLA during kimchi fermentation. Exogenous linoleic acid (LA) which is a substrate for conversion to CLA was not added to kimchi since LA was already exists in red pepper. Changes in sensory properties of kimchi and production of CLA were measured after inoculation of the encapsulated starter. The optimum inoculation concentration of the encapsulated starter was 0.1% (w/w) for production of CLA without causing changes in kimchi taste.

• Korean Journal of Food Science and Technology
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• v.31 no.1
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• pp.263-266
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• 1999

Pectic substances are important to sustain the textural properties of kimchi during fermentation and distribution. Therefore proper control of pectin degrading enzyme activity is critical on quality control in kimchi industry. Pectin degrading enzymes of kimchi ingredients were assayed to improve the product quality. Among pectin degrading enzymes, polygalacturonase and pectinesterase were selected. The specific activity of polygalacturonase was the highest in salted and fermented anchovy, followed by chinese radish. Considering the amount of protein contents, salted and fermented anchovy and dried red pepper showed higher polygalacturonase activity than other ingredients. In terms of specific activity, chinese radish showed the highest pectinesterase activity, followed by salted and fermented anchovy. However, the total activity of salted and fermented anchovy was the highest. Chinese radish showed higher pectinesterase activity than any other ingredients.

• Journal of the Korean Society of Food Science and Nutrition
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• v.29 no.5
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• pp.796-801
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• 2000

Kimchi is the Korean traditional food which is fermented properly from salted Korean cabbage of raddish with other various supplements. Kimchi therefore can be the major sources for various kinds of nutrients and other biological substances. The fermentation process accompanies with complicated reaction mechanism which bacteria, fungi and yeast are involved and they produced aroma, taste and bioactive components. To identify nucleoside, this study was conducted with freeze-dried mustard leaf, mustard leaf kimchi and fermented mustard leaf kimchi. Hexane, CH$_2$Cl$_2$, EtOAc and BuOH was used in order to extract their components. The isolated compounds I and II from mustard leaf and mustard leaf kimchi were identified as adenosine and uracil using UV, $^{1}H$-NMR, $^{13}C$-NMR and LC-MS, respectively. Compound I, II and nucleosides are the first report of its occurrence from mustard leaf and their kimchi, the standardized ratios of ingredients for kimchi were 10 of anchovy juice, 8 of red pepper powder, 3 of garlic, 1.5 of ginger, 6 of paste of glutinous rice. The nucleoside of mustard leaf and their kimchi was determined and compared. The order of nucleosides contents of mustard leaf was uridine>cytosine>uracil>adenine>guanosine>guanin, that of fresh mustard leaf kimchi was uridine>uracil>cytosine>guanine>adenosine>adenin>guanosine and that of fermented mustard leaf kimchi (5days at 15$^{\circ}C$) was guanine>adenine>adenosine>guanosine. The differences of nucleoside contents from those were due to various supplements and fermentation process.

• Journal of Community Nutrition
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• v.7 no.2
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• pp.85-92
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• 2005

The purpose of the study was to get some information about the educational program for consumers in the community. For this, the author investigated the ability to identify the imported foods and the educational contents to be taught. The subjects for this study were 183 housewives living in Cheongju city, and the research was conducted from March 1 to March 15, 2003. A survey questionnaire was distributed, asking general matters regarding the subject, attitude when purchasing foods, the ability to identify the imported foods, educational contents to be taught, and the identification ability between the domestic and the imported foods. The data was analyzed for percentage, mean, standard deviations using SAS program, and was also examined with Chi-square or ANOVA. $92.3\%$ of housewives checked the label to distinguish between the domestic food and the imported one, among which $99.5\%$ preferred to buy the domestic brand. For major reasons of this preference, $46.3\%$ of them reported that the imported foods had many harmful substances. $66.1\%$ of the subjects, however, replied that they did not have the ability to discern the differences between the two. The identification information was received from 'TV or radio program', which $61.7\%$ of the subjects reported as such. $61.5\%$ of the subjects were inclined to receive education about the imported foods. For the educational contents, $75.4\%$ wanted to learn 'the method to identify the imported foods'. According to the identification test on the imported foods, they got 13.6 points on the average out of 40 points, which was quite low. The highest correct answer was for pteridium aquilinum ($63.7\%$), sesame ($49.2\%$), and yellow croaker ($45.6\%$), while the highest incorrect answer was for red pepper powder ($40.4\%$), chestnut ($40.6\%$), and dried pepper ($32.2\%$). The results suggested that most of the respondents had negative attitudes towards the imported agricultural products, but their identification ability was quite poor. Therefore, it is necessary to provide education and publicity work in relation to the identification methods for the imported foods so that consumers may have less risk from the imported agricultural products.

• Journal of the Korean Society of Food Science and Nutrition
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• v.31 no.4
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• pp.553-558
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• 2002

To utilize the small redlip croaker, four kinds of seasoned fillet were produced. The nutrient composition, peroxide value and coliforms count of the products were determined, and sensory characteristics were evaluated. The seasonings consisted of the formula for commercial dried file fish added with water (A, control), green tea extract (B), rosemary extract (C) and soypaste with red pepper (D). The crude protein and carbohydrate contents of the products were in the range of 39~45% and 23~3l%, respectively. The lipid content of product B was the lowest, while that of product D was the highest among the tested products. All products showed similar amino acid profiles with a high content of glutamic acid, aspartic acid, glycine and lysine. The saturates in fatty acid composition were similar (50~51%) among the products. However, the polyenes were higher (17%) in product C than products A, B and D (13%). The peroxide value of product C was the lowest among the products. There were not significant differences in taste and color among the products.

• Food Science and Preservation
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• v.8 no.4
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• pp.419-426
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• 2001

This study was carried out to develope a convenient instant spiced Toha-jeot. Toha-jeot was manufactured by five samples; 8%, 10%, 13% 23% sodium chloride and a conventional type soy sauce. The Toha-jeot was refrigerated at 4$\pm$1$\^{C}$ for 3 months and then boiled glutinous rice, red pepper powder, chopped garlic and ginger were added, and the spiced Toha-jeot was fermented at 4$\pm$1$\^{C}$ for 2 months, was freeze-dried at a condition of 40$\^{C}$, vacuum 100∼200 millitor millitorr and then packed in vacuum. It is called freeze-dried instant spiced Toha-jeot (FIST). Changes in the components and quality of refrigerated spiced Toha-jeot (RST) and FIST were investigated for 30day. The moisture content of RST was 53.79∼58.91%. Among the mineral constituents of RST, Na and Ca were dominantly occupying. Water activity of FIST was 0.28-0.39 while that of RST was 0.87-0.92. TBA value of FIST was lower than that of RST. Acidity, VBN (volatile basic nitrogen) and TBA(thiobarbituric acid) of the FIST and RST increased slightly, whereas pH decreased. The major components of fatty acids in FIST and RST were analysed into a feater amount of linoleic acid (Cl8:2), palmitic acid (Cl6:1), oleic acid (Cl8:1), linolenic acid (Cl8:3), EPA (C2O:5) and stearic acid(Cl8:0). In sensory evaluation, the RST had higher scores in color and taste and the FIST in chewiness and flavor. The qualitative characteristics and sensory evaluation of FIST and RST were similar.

• Journal of Nutrition and Health
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• v.52 no.2
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• pp.185-193
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• 2019

Purpose: This study was conducted to develop standards for the salinity and sodium content in representative Korean foods high in sodium. Methods: A total of 600 foods from four seasonings (soy sauce, soybean paste, red pepper paste, and ssamjang) and 16 representative Korean foods high in sodium were collected from 10 households, 10 industry foodservice establishments, and 10 Korean restaurants in 10 cities nationwide and analyzed for their salinity and sodium content. Based on the findings, the standards with a 20% ~ 30% reduced sodium content and salinity from the current level were presented. Results: The suggested standards of salinity (and sodium content per 100 g) were less than 12% (4,500 mg) for soy sauce, 9% (3,500 mg) for soybean paste, 5% (2,000 mg) for red pepper paste, and 6% (2,500 mg) for ssamjang. The reduced standards of salinity for soups were suggested to less than 0.5% for clear soup and 0.7% for soybean paste soup, while for broths, it was 0.6% for clear broth and 0.7% for other broths. The standards of salinity for stews were suggested to less than 0.8% for soybean paste stew, 0.6% for other stews, 0.9% for steamed and stir-fried fish dishes, 1.0% for braised dishes, 4.0% for stir-fried dried fishes, 1.3% for other braised dishes including vegetables, and 1.5% for pickled vegetables and kimchi. Conclusion: Standards for the sodium content and salinity were suggested to reduce the sodium level in fermented soybean sauces and representative Korean high sodium dishes by 20% from the current levels. Nevertheless, it will be necessary to adjust the standards properly to reduce the sodium content and salinity further by considering the future status of sodium intake.

• Korean Journal of Community Nutrition
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• v.17 no.5
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• pp.555-578
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• 2012

This study was conducted to investigate which food items are perceived as HANSIK (Korean food) in Korea. 562 males and females aged 20-70 were surveyed on 512 most frequently consumed dish items from 4th Korean National Health and Nutrition Survey if they perceive it as HANSIK. Dish items in kimchi, namul sukchae (cooked and seasoned vegetable) and jeotgal (salt-fermented food) category showed high response rate to be perceived as HANSIK. The response rate of twigim (frying foods) as HANSIK was low showing less than 70%. The response rate as HANSIK for foreign origin foods such as ramen and jjajangmyeon (black bean paste noodle) were lower than 25%. In jang yangnyum (seasoning) category, doenjang (soybean paste) and gochujang (red pepper paste) showed high response rate as HANSIK more than 90%. Females showed a higher response rate as HANSIK than males for most food items except several items of myen mandu (noodle and dumpling). The younger age group had higher HANSIK perception on many items of recently consumed foods, especially budae-jjigae (spicy sausage stew) (p < 0.001) and jwipo-jorim (braised dried filefish) (p < 0.001), implying that they already accept the common foods as HANSIK regardless of the origin. These results provide an information on the foods perceived as HANSIK among currently consumed common foods in Korea and these results can be utilized for establishment of HANSIK concept reflecting transition of dietary life in Korea.

• Korean Journal of Food Science and Technology
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• v.39 no.1
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• pp.25-28
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• 2007

A survey of total aflatoxin levels was conducted on 565 food samples (cereals, nuts, etc) collected in commercial markets. The determination of aflatoxins ($B_{1}$, $B_{2}$, $G_{1}$ and $G_{2}$) was performed using HPLC with fluorescence detector. The Limit of Detections (LODs) of the B group and G group were 0.05 ng/g and 0.07 ng/g, respectively. In addition, recoveries of rice, peanut butter, and red pepper flour were satisfactory. Total aflatoxin was detected 27 samples(4.8%) out of 565 samples. Incidence ratios in cereals, nuts, processed products, and other foods were 0.2, 0.4, 3.0 and 1.2%, respectively, but aflatoxin was not detected in pulse and dried fruits. The daily intake of total aflatoxin using food intakes was 0.04 ng/kg bw/day.