• Korean Journal of Food Science and Technology
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• v.33 no.3
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• pp.327-332
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• 2001

Attempts were made to investigate the effect of gamma irradiation and heat treatment on quality changes of Bulgogi sauce during the storage at 4 and $20^{\circ}C$. Total acidity, Surface color, brix, microbial growth and sensory quality of test products were evaluated during storage. Total acidity of sauce did not change during storage at $4^{\circ}C$, whereas those of control and 4 kGy groups changed significantly during storage at $20^{\circ}C$. Gamma irradiation and heat treatment had little effect on brix of the suace during storage period. Surface color of control and 4 kGy group significantly changed during storage, especially at $20^{\circ}C$. Sucrose contents in sauce decreased during storage, while glucose and fructose contents increased. Sensory quality of sauces stored at $4^{\circ}C$ for 12 weeks was similar, except the control. Control and 4 kGy treated sauces stored at $20^{\circ}C$ for 6 week had detectable levels of off-flavor. Colifrom bacteria were not detected in sauces treated by either heat or gammma-ray. Total acrobic increases in colony counts were slower at $4^{\circ}C$. Yeasts or molds were not detected in sauces treated by heat or gamma-ray over 7-10 kGy. These results indicated that gamma irradiation over 7kGy or heat treatment of the sauce maintained acceptable quality.

• Journal of the Korean Society of Food Science and Nutrition
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• v.40 no.11
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• pp.1589-1596
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• 2011

Mulberry was added to bulgogi marinade sauce at concentrations of 5, 10, 15, and 20%. Moisture content, crude ash, crude protein, and crude fat in the control group were 62.2~62.6%, 3.5~3.6%, 2.2~2.4%, and 1.5~1.6%, respectively. The moisture contents significantly increased with mulberry content. Crude ash, protein, and fat contents relatively decreased as the amount of mulberry in the sample increased. DPPH radical scavenging activity of fresh mulberry was also measured. Fresh mulberry showed higher antioxidant activity in the marinade, and it increased with the mulberry content. Color L, a, and b values of the marinade containing 5% mulberry were 25.41, 3.1, and 4.3, respectively, and all values significantly decreased as the amount of mulberry in the marinade increased. Sensory evaluation of bulgogi marinade was performed by trained panelists. Bulgogi marinade prepared with 15% mulberry content showed a significantly higher score in the sensory evaluation.

• Journal of the Korean Society of Food Science and Nutrition
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• v.42 no.11
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• pp.1857-1863
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• 2013

Bulgogi sauces containing electron beam-irradiated garlic powder (1%, 3%, and 5%) were used to compare their irradiation status before and after pasteurization ($85^{\circ}C$, 30 min), using a thermoluminescence (TL) analysis by two different laboratories. The sauces with non-irradiated ingredient only provided a background TL glow curve with a maximum peak after $300^{\circ}C$. However, the presence of irradiated ingredient (1 and 10 kGy) was evident through the typical TL glow curves in a temperature range of 150 to $250^{\circ}C$. The concentration of irradiated ingredients showed a greater impact on identification characteristics than their radiation doses. TL ratios ($TL_1/TL_2$) were not able to confirm the results showing evidence of irradiation through the TL glow curve shapes. Pasteurization showed a negligible effect on the key identification parameters and did not change the shape or temperature range of radiation-specific TL glow peak, but reduced TL glow curve intensity. TL glow curve shape with the maximum peak in a temperature range of $150{\sim}250^{\circ}C$ was the most useful characteristic providing information required for confirming the irradiation status.

• Korean journal of food and cookery science
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• v.29 no.4
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• pp.387-398
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• 2013

Seasoned soy sauce is one of the popular seasoning sauces added to the Korean traditional foods such as Bulgogi, Galbi. However, industrially processed sauces have poor sensory quality because of heating treatment for sterilization. The purpose of this study was to develop seasoned soy sauce having fresh taste and good quality by applying superheated steam (SHS) and high hydrostatic pressure (HHP) technologies. To maintenance the sauce qualities, food materials such as apple, onion, and garlic were pretreated with SHS (heater $100^{\circ}C$, steam $280^{\circ}C$, 30 s~1 min 30 s) before mixing with other ingredients. During storage of 7 days, color, pH, and browning potential of SHS treated samples (apple, onion and garlic) did not change and also polyphenol oxidase was inactivated (p<0.05). The seasoned soy sauce including SHS treated materials was sterilized by thermal process ($85^{\circ}C$, 30min) or non-thermal process, HHP (550 MPa, $5{\sim}10^{\circ}C$, 3 min). In SHS+HHP treated sauce, salinity, sugar contents, lightness, viscosity did not change (p<0.05), and total viable cell counts were detected below 4 log cycle at $5^{\circ}C$ for 30 days. E.coli and B.cereus are not determined in all samples. In sensory evaluation, Bulgogi prepared with SHS+HHP treated sauce was more acceptable than others.

• Food Science of Animal Resources
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• v.32 no.1
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• pp.18-23
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• 2012

This study was conducted to survey the perception of domestic consumers about traditional pork dishes, and to utilize the survey result as a basis for the development of processed pork products. A survey was conducted on 218 domestic consumers regarding the following: general questions, propensity and preference to consume pork dishes, pork dishes feasible for export, and the types and problems of processed products feasible for export. The results of the survey showed that the respondents consumed pork dishes 3-4 times a month on average and they appeared to consume the pork dishes most frequently in specialized restaurants. The highest preference was shown in Samgyeopasal gui (grilled pork belly) and Galbi gui (grilled pork rib) among the pork dishes, whereas the lowest preference was shown in Kkubdegi gui (grilled pork skin) and Gookbob (boiled rice and pork served in soup). When the type of processed pork products available according to pork dishes were analyzed, the result showed that Samgyeopasal gui (grilled pork belly) and Nirbiani (slices of roast, seasoned pork in width) could be developed as a frozen product, Geyook Bokeum (stir-fried spicy pork), Bulgogi (Korean-style barbecued pork), and Galbi jjim (braised short ribs) could be developed as a retort product, and that Bossam (boiled pork eaten with a salty sauce and wrapped in greens), Pyeonyuk (slices of boiled pork), Jokbal (pork trotters), and Sundae (kneading together seasoned mixture of vegetables and glass noodles stuffing it into casings made of hog intestines, which are then tied off at the ends and boiled) could be developed as a vacuum-packed product. When the survey concerning the problems expected in the development of processed products using pork dishes was conducted, the result showed that there could be a texture change issue for Galbi gui, Samgyeopasal gui and Nirbiani; a preservation issue for Bossam, Pyeonyuk; a safety issue for Bulgogi and Geyook Bokeum; a taste and flavor change issue for Geyook Bokeum and Sundae; and a packaging issue for Gookbob.

• Journal of Nutrition and Health
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• v.45 no.6
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• pp.588-599
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• 2012

There is a limitation to estimate vitamin $B_{12}$ intake due to the lack of data on vitamin $B_{12}$ content of Korean commercial foods. In this study, vitamin $B_{12}$ content was determined in favorite Korean restaurant foods, convenient or instant foods, fast foods and bakery products through a modified microbioassay using Lactobacillus delbrueckii ATCC 7830. Bulgogi and seafood & green pepper griddle had high vitamin $B_{12}$ content, 3.50 and $2.96{\mu}g$/100 g, respectively. Pork suyook, pork griddle and pollack griddle had 0.48, 0.31 and $0.32{\mu}g$/100 g of vitamin $B_{12}$, respectively. In stew, soft-tofu stew with seafood and doenjang stew with seafood had relatively high vitamin $B_{12}$ content, 1.93 and $1.44{\mu}g$/100 g, respectively. Bibimbap and 4 different types of rice porridge, beef & mushroom, chicken & ginseng, seafood or abalone, had 0.36, 0.08, 0.09, 1.64 and $0.13{\mu}g$/100 g of vitamin $B_{12}$, respectively. One serving of haejanggguk, yookejang, chuotang and galbitang had 5.97, 2.04, 2.63 and $1.91{\mu}g$ of vitamin $B_{12}$, respectively. One serving of samgetang and sulongtang had $2.89{\mu}g$ and $6.64{\mu}g$ of vitamin $B_{12}$. In noodles, one serving of cram noodle soup, bibim-nangmyeon, and mul-nangmyeon had 18.8, 1.21 and $0.38{\mu}g$ of vitamin $B_{12}$, respectively. One regular gimbap and one triangle gimbap contained 1.09-2.53 and $0.54-1.11{\mu}g$ of vitamin $B_{12}$, respectively. One cheese-burger, chicken-burger and bulgogi-burger had 0.76, 0.62 and $0.54{\mu}g$ of vitamin $B_{12}$, respectively. A plain bagel and a waffle contained 0.13 and $0.17{\mu}g$/100 g of vitamin $B_{12}$, respectively. Ready-made tomato sauce or cream sauce for spaghetti in a retort pouch contained only a trace of vitamin $B_{12}$. In conclusion, these results should contribute to improving the present food vitamin $B_{12}$ content database, most of which were cited from foreign data, thereby it could be helpful to estimate the vitamin $B_{12}$ intake of Koreans more accurately than before. It will also provide new information for dietary education related to vitamin $B_{12}$ and health.

• Journal of the Korean Society of Food Culture
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• v.27 no.3
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• pp.294-303
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• 2012

This study was conducted to compare the preference and satisfaction for Korean traditional foods (Jeonju Bibimbap, Daetongbap, Jeonbokjuk, Jorangiddockguk, Hobakbumbuk, Darkgalbee, Eonyang Bulgogi, Moyackgwa, Insam Jeonggwa, Maejackgwa) in foreigners and Koreans. In this study, 27 foreign and 31 Korean university students were surveyed. Statistical analysis and Mann-Whitney U test were performed using the SPSS statistical package (17.0). The major findings were as follows: 1) Foreigners had higher experience of eating Darkgalbee (84.6%), Jeonju Bibimbap (80.8%), Daetongbap (53.8%), and Jeonbokjuk (53.8%) among Korean traditional foods, whereas their eating experience of Insam Jeonggwa (3.8%), Maejackgwa (11.5%), Moyackgwa (15.4%) and Jorangiddockguk (23.1%) was lower. 2) Foreigners and Koreans both liked sweet taste, but disliked sour taste, bitter taste, garlic flavor, sesame flavor, and soy sauce flavor among the sensory characteristics of Korean traditional foods. 3) Foreigners scored their overall satisfaction of Korean traditional foods in the order of Jeonju Bibimbap ($7.70{\pm}0.95$), Eonyang Bulgogi ($7.62{\pm}2.10$), Daetongbap ($7.59{\pm}1.60$), Darkgalbee ($7.20{\pm}1.56$), and Jeonbokjuk ($6.67{\pm}1.64$), whereas Koreans rated higher scores for Eonyang Bulgogi ($8.28{\pm}1.19$), Darkgalbee ($8.20{\pm}1.00$), Jeonju Bibimbap ($7.73{\pm}1.08$), Jeonbokjuk ($7.69{\pm}1.44$), and Moyackgwa ($7.43{\pm}1.52$).

• The Korean Journal of Food And Nutrition
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• v.19 no.4
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• pp.482-495
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• 2006

The purpose of this study was to investigate the eating behavior and food preference of preschool children in day care facilities. Subjects of this study were 192 young children who lived in Sungnam city, Gyeonggi-Do. The results are summarized as follows: The parents reported that 34% of the children ate 'unbalanced diet'. And 16% of the children ate small portions of food. The parents picked up several reasons for their children's 'unbalanced diet' such as 'dislike of the tastes(29.2%), 'texture in the mouth(28.6%)', 'smell of food(18.2%)' Fifty-six percent of parents took 'to change the cooking methods' as the best way to make their children have good eating habits in their home. The highest score of preference among the children was noodles with bean sauce and kimbab for staple food, stews seaweed soup for soups and stews, bulgogi and fried chicken for side dish. The young children's preference score fur side dish made with meats were higher than made with vegetables. This study made a suggestion to parents of children ages 4 to 6 and to teachers in preschool that they prepare for foods made with vegetables.

• Journal of the Korean Home Economics Association
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• v.39 no.6
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• pp.15-24
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• 2001

The purpose of this study was to investigate the perception and preference of Americans residing in Korea for Korean traditional food. Out of 250 questionnaires, 95 respondents were taken. Most of the respondents (96.8%) were experienced in eating Korean food in Korea and 66.3% of them were experienced in eating Korean food in other countries except Korea. On the appearance and color of Korean flood,94.8% and 93.7% of the respondents answered for earth that it was 'Good'. Most of the respondents (95.7%) had much interest in Korean flood. Nevertheless they proposed the improvement in hot and strongly spiced Korean food. The following Korean foods; bibimbap, bulgogi, kalbigui, samgetang, and chapchae were preferred by most Americans. The preference on 11 korean traditional foods was significantly different in gender, age, and period of residence at p<0.05. This study suggests that we need to develop the sauce and seasoning which is suitable for foreigner's taste to improve the popularity of Korean foods. And we also know that foreigners have the trends to avoid selecting the food item which is unknown for them. Therefore, we need to add the information about Korean food ingredient and the cooking method which is not familiar with foreigners on the menu.

• Korean journal of food and cookery science
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• v.29 no.5
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• pp.463-468
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• 2013

This study was conducted to establish a standard recipe for Bulgogi. For the initial result of the study, the process of establishing standard quality indicators was presented based on surveys with regard to the preferences of the Korean people, American residing in Korea and Americans in USA. A basic recipe was selected based on the preference test. Then additional surveys targeting groups of Korean people, American residents in Korea and Americans were conducted after resetting the contents of soy sauce, sugar, spring onion + garlic of the basic recipe. As a result, differences in preferred seasoning contents between the groups were found. Eventually, the decision for the final recipe of the on-the-spot market search was made.