• Journal of Microbiology and Biotechnology
• /
• v.15 no.4
• /
• pp.815-822
• /
• 2005

In order to extend the shelf-life of packaged or coated foods, an antibacterial edible film was developed from soybean meal that had been fermented with Bacillus subtilis under the optimum condition of pH 7.0-7.5 and $33^{\circ}C$ for 33 h. The water vapor permeability of the fermented film ($86.0 mg/cm^2{\cdot}h$) was higher than those of normal soybean films ($66.9 mg/cm^2{\cdot}h$). Protein solubility of the fermented film was also higher than ordinary soy protein film at the pH range of 3 -10. The fermented soybean film had higher tensile strength and lower $\%$ elongation (elongation rate) than the ordinary soybean film, mainly because partial hydrolysis of proteins in the soybean film occurred during fermentation. Antimicrobial properties of the fermented film on foodstuffs were measured by placing the films on surime, jerked beef, and mashed sausage media; containing $10^2-10^3$ CFU/plate of foodborne pathogenic bacteria, and showed significantly higher inhibitory effects on the growths of all the indicating bacteria. The film could be used as a packaging material in the food industry. However, before direct application of the fermented film to the commercial food industry, its poor mechanical and antibacterial properties need to be improved.

• Journal of the East Asian Society of Dietary Life
• /
• v.17 no.2
• /
• pp.153-163
• /
• 2007

This study was conduced to identify the preference and intake frequencies of traditional Korean foods by Chinese-Koreans in the Yanbian region of China based on the hometown of the female head of household. Data were collected from 261 Korean housewives living in Yanbian. Twenty-six kinds of daily food items were surveyed. Analysis of variance was used to compare the similarities and differences among the three groups, which were divided according to hometowns in North Korea, South Korea, and China. The results for the traditional Korean daily food preferences showed that housewives born in South Korea are more likely to prefer cereal soup, vegetables soup, and fermented rice punch than housewives from North Korea and China. Considering the intake frequencies of traditional Korean foods, Korean housewives born in China are more likely to eat boiled rice and a bun stuffed with seasoned meat and vegetables, as well as beef and vegetables cooked in a casserole than housewives with hometowns in South Korea and North Korean. In this article, similarities and differences in the preferences and intake frequencies of traditional Korean foods are discussed, and implications for nutritionists as well as food marketers are provided.

• Journal of the Korean Society of Food Culture
• /
• v.24 no.6
• /
• pp.597-606
• /
• 2009

The purpose of this study was to investigate perceptions and globalization of Korean food among university students with food related majors. Self-administer questionnaires were completed by 386 students, and data was analyzed using descriptive statistics, t-test, ANOVA and regression analysis. The students in food-related majors had positive perceptions of Korean food. They had perceptions of Korean foods as 'fermented foods', 'seasonal foods', and 'medical foods' and have 'various spices'. Most students agreed that Korean foods need to be 'creatively transformed' and 'localized' in order to globalize successfully. Localization, fusion and creative transformation of Korean food are more important than simple adherence to traditional Korean food. There were statistically significant differences in perception between students in different majors. Students majoring in traditional Korean cuisine showed a more positive perception and attitude toward globalization of Korean food.

• Journal of the Korean Society of Food Culture
• /
• v.27 no.6
• /
• pp.553-587
• /
• 2012

In this study, the Korean cookbook, Jusiksiui, which was published in the late 1800s, was investigated. The results revealed that Jusiksiui contained more than 100 foods. Specifically, 12 staple foods were foods recorded including five types of porridge, three types of noodles, and four kinds of dumplings. Moreover, 49 side dishes were present, among which Jjim (steamed food) was most common, being recorded ten times. Additionally, seven types of Jeon (pancake) & Gui (roasted food) and Kimchi & Jangajji (pickled vegetables), four kinds of soup and Jeongol (stew), stir-fry, Sukyuk (boiled beef), and three types of Sukchae and Sashimi were found. Moreover, 14 recipes for rice cakes, two recipes for Korean cookies and three recipes for drinks were found. Seven recipes for wine, including plain rice wine, medicated wine and flavored wine, were also found. Finally, four different soy sauces Jibjang (a kind of soy sauce paste), hot pepper paste, Cheonggukjang (fast-fermented been paste), and Jeupjihi and roasting hot pepper paste were observed.

• Journal of Nutrition and Health
• /
• v.12 no.2
• /
• pp.53-63
• /
• 1979

In continuation of the previous $studies^{2{\sim}3)}$, the folate activity levels in 226 Korean food items were determined by a modified microbiological assay with Lactobacillus casei. There was a large variation in folate activity between the different food groups as well as between each individual food. There was also a wide variation in the biologic availability of folate in foods and the different forms of the folate with different foods in varying amounts. Data showed that almost always, foods cooked and/or processed were lower in folate activity than fresh or raw food and the amount of the loss varied greatly in each food. In calculating dietary intake, total rather than free folate activity levels should he used. In addition, loss of folate activity during cooking and processing of foods should be considered as a major concern for appraising diets and food supplies. Among all assayed food items, including Part $I^{2)}}$ and $I^{3)}$, yeast 2800. ug total per 100g the highest folate level. Soybean, spinach, Shepherd's purse and liter of beef and pork had over 100 ug total per 100 g folate activity. Folate ranging over 50 ug total per 100 g was found in all dried legumes, nuts and seeds assayed, Garland Chrysanthemum, leek, mugwort, wafer cress, asparagus, e99 folk and beef kidney. Wheat, sweet Potatoes,dried fungus, green onion, hotrod pepper, lettuce, radish and some fermented soybeen products had considerably higher folate content ranging around 40 ug total per 100 g. Substantial amounts of folate were not found in many food groups, and among specific groups, in part in starch, sweets, fruits, meat, fish, milk, and cooked and processed foods. Soused fish, oils and fats, beverages, liquor and seasonings, other than fermented soybean products, had almost no folate.

• Preventive Nutrition and Food Science
• /
• v.14 no.2
• /
• pp.162-167
• /
• 2009

Various fermented foods were screened in search of food-grade bacteria that produce bacteriocins active against Gram-negative pathogens. An isolate from a mold-ripened cheese presented antibacterial activity against Gram-positive and Gram-negative bacteria. The most active isolate was identified as Lactobacillus casei by a biochemical method, ribotyping, and membrane lipid analysis, and was designated as OSY-LB6A. The cell extracts of the isolate showed inhibition against Escherichia coli p220, E. coli O157, Salmonella enerica serovar Enteritidis, Salmonella Typhimurium, and Listeria monocytogenes. The antibacterial nature of the cell extract from the isolate was confirmed by eliminating the inhibitory effects of acid, hydrogen peroxide, and lytic bacteriophages. The culture supernatant and cell extract retained antibacterial activity after heating at $60{\sim}100^{\circ}C$ for $10{\sim}20$ min. The activity of the cell extract from Lb. casei was eliminated by pronase and lipase. Finally, the cell extract showed a bactericidal mode of action against E. coli in phosphate buffer solution, but it was bacteriostatic in broth medium and food extracts.

• Microbiology and Biotechnology Letters
• /
• v.43 no.3
• /
• pp.286-290
• /
• 2015

Lactic acid is a useful platform chemical for a wide range of food and industrial applications such as pharmaceuticals and cosmetics. Among 313 strains of lactic acid bacteria isolated from different traditional Korean fermented foods, eight Lactobacillus strains effectively utilized xylose as a carbon source to produce lactic acid. A lactic acid bacterium identified as Lactobacillus buchneri produced the highest amount of lactic acid from xylose under anaerobic conditions. The optimum xylose concentration and incubation temperature were 50 g/l and 37℃, respectively; under these conditions, 22.3 g/l lactic acid was produced.

• Journal of Microbiology and Biotechnology
• /
• v.5 no.5
• /
• pp.285-291
• /
• 1995

Saccharide utilizations for the growth by Bifidobacterium longum and Bifidobacterium breve were compared. B. longum fermented glucose more rapidly than lactose as a carbon source whereas B. breve fermented lactose at a rate higher than that of glucose. The highest cell concentration, in the case of B. longum, was obtained when cultivated in a jar fermentor that contained modified MRS medium that half the beef extract was replaced by the same amount of tuna extract, and that pH was controlled at 6.0. B. breve showed the best growth when grown in a jar fermentor containing the MRS medium with lactose instead of glucose, controlled at pH 6.0. The optimal concentration of peptone in MRS medium for the growth of B. breve was 5 g/l.

• Journal of Microbiology and Biotechnology
• /
• v.19 no.2
• /
• pp.178-186
• /
• 2009

To examine their potential as probiotics, acid and bile tolerance, antibiotics resistance, adhesion capacity to Caco-2 and HT-29, and antibacterial activity, of LAB isolated from Korean fermented foods such. as dongchimi, kimchi, Meju, and doenjang were assayed against foodborne pathogenic bacteria. DC 55, DC 136, DC 222, KC 21, KC 24, KC 34, KC 43, KC 117, MJ 54, MJ 301, SP 33, and SP 170 strains were resistant to acid and bile conditions. In particular, DC 55, DC 136, KC 24, KC 43, and MJ 301 strains were highly resistant to higher than 20 ${\mu}g/ml$ concentrations of vancomycin, streptomycin sulfate, or amoxicillin, whereas, DC 222, KC 21, KC 34, KC 117, MJ 54, and SP 33 strains were susceptible to lower than 2 ${\mu}g/ml$ concentrations of those antibiotics. The adhesion to HT-29 and Caco-2 cells varied with the strains tested in a strain-dependent manner. The highest level of adhesion was observed with DC 55, KC 21, KC 24, and MJ 301 strains, having higher than 50% of adhesion to HT-29 or Caco-2 cells. In addition, Staphylococcus aureus was the most sensitive to KC 21, showing an inhibition of about 70%, and the antibacterial activity of KC 21 against S. aureus resulted most likely from both organic acids and bacteriocin. Based on its phenotypic characteristics and utilization of various sugars, the KC 21 strain was identified as Lactobacillus plantarum.

• Journal of Food Hygiene and Safety
• /
• v.9 no.4
• /
• pp.221-228
• /
• 1994

The quantitative detection of ochratoxin A (OT-A) in the traditional fermented foods were investigated to develop the analytical procedures, Enzyme-Linked Immunosorbent Assay(ELISA) and Chemiluminescence Immunoassay(CIA). Products used were divided into two groups: the first was the home-made 13 Doenjang, 12 Kanjang, and 14 Gochujang; and the second the traditional commercial products, 17 Deonjang and 11 Kanjang, which collected throughout the country. The standard curve for the quantitative determination of OT-A showed that the sensitivities in ELISA and CIA were upto the level of 20 pg/assay, and that the OT-A recovery rates were appeared to be more than 90%. The residual OT-A in the home-made products were 7.1$\pm$3.7 ng/g for Deonjang, 2.1$\pm$4.1 ng/g Kanjang were found in the traditional commercial products. Residual OT-A in the home-made products was comparatively far less than that of the traditional commercial products. At heat stability test of OT-A in the traditional fermented foods was found to be stable even at 121$^{\circ}C$ for 120 min.