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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean journal of food and cookery science
Journal Basic Information
Journal DOI :
Korean Society of Food and Cookery Science
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Volume & Issues
Volume 23, Issue 6 - Dec 2007
Volume 23, Issue 5 - Oct 2007
Volume 23, Issue 4 - Aug 2007
Volume 23, Issue 3 - Jun 2007
Volume 23, Issue 2 - Apr 2007
Volume 23, Issue 1 - Feb 2007
Selecting the target year
A Comparison of the Antioxidant Activity of Barley Leaf Tea and Green Tea according to Leaching Conditions in Distilled Water
Jang, Jae-Hee ; Choi, Hee-Sun ; Cheong, Hyo-Sook ; Kang, Ok-Ju ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 165~172
This study was conducted to investigate the antioxidant amounts and properties of barley leaf tea and green tea at under various leaching conditions. The leaching temperatures and times of the distilled water were 50, 70 and
C for 1, 3 and 5 min, respectively. The levels of crude fat and ash in the barley leaf tea were higher than those in green tea. Brown color intensity and flavonoid absorbance increased with leaching temperature. The highest vitamin C levels and water-soluble phenol resulted at
C for 3 min. The DPPH radical scavenging activities of the barley leaf tea and of green tea were 11.06 and 50.56%, respectively, compared to 2.9% for L-ascorbic acid (150 ppm). The nitrite scavenging activities of barley leaf tea and green tea were 95.11 and 74.88%, respectively. The SOD-like activities of barley leaf tea, green tea, and L-ascorbic acid (150 ppm) were 12.99, 8.33, and 12.75%, respectively. The antioxidant effect of green tea was higher than that of barley leaf tea and lastly, the SOD-like activity of barley leaf tea was as high as that of green tea.
The effects of fermentation agent and fermentation temperature on the quality of Bori-sangoedduk
Kwak, Eun-Jung ; Park, Sang-Hee ; Kim, Ji-Sang ; Lee, Young-Soon ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 173~179
The effects of fermentation agent and fermentation temperature on the quality of Bori-sangoedduk We examined the effects of fermentation agent and fermentation temperature on the quality characteristics of Bori-sangoedduk a traditional dduk(rice cake) from Jeju, Korea. Bori-sangoedduk was prepared by mixing wheat flour, barely flour, and Borisul or Takju as the fermentation agent the mixture was then fermented at 30, 35, and
C. for 3 hr, and steamed. The L- value of the Takju group was higher than that of the Borisul group, and the samples fermented at
C in each group had higher than L-values than those fermented at
C . The a- and b-values did not differ significantly by the fermentation agents and fermentation temperatures. The loaf volume of the Borisul group was higher than that of the Takju group however, there were no significant differences according to fermentation temperature. The values of hardness, springiness, and cohesiveness were lower in the Borisul group than in the Takju group due to a greater number of pores and surface cracks. Hardness, springiness, and cohesiveness values were highest at fermentation temperatures of 30, 35, and
C , respectively, in both groups, compared to samples at other temperatures. In the acceptance test, the Takju group was preferred over the Borisul group for appearance, texture, taste, flavor, and overall preference. There were also statistically significant preferences in taste, flavor, and overall preference for samples fermented at
C , in both groups, compared to those fermented at
C. In the descriptive test, there were no differences in color according to fermentation agent and fermentation temperature, however, the Takju group was shinier than the Borisul group. In addition, the Takju group was harder and springier than the Borisul group, and had less sour taste and flavor than the Borisul group. Finally, in terms of overall preference, we found that Bori-sangoedduk made with Takju and fermented at
C for 3 hr was the best formula, due particularly to its taste and flavor.
Lipid Composition and Oxidation of Wheat Flour Stored at Various Water Activities
Lee, Yoo-Sung ; Choe, Eun-Ok ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 180~186
In this study, we examined the effects of different water activities (Aw: 0.3, 0.5, and 0.8) on the lipid composition and oxidation of wheat flour after 28 days of storage in the dark at
C. The lipid content of the flour was 2.7%, and had decreased significantly (p<0.05) at the end of the storage period. Decrease in monoacylglycerol and increase in free fatty acids were observed, however, phosphatidic acid, phosphatidylglycerol, and phosphatidylinositiol were not detected after storage. Phosphatidylehtanolamine was more stable than phosphatidylcholine during the dark storage of flour. The flour lipids consisted of palmitic (18%), stearic (1%), oleic (14%), linoleic (63%), and linolenic (4%) acids, and the relative content of linolenic acid decreased after 28 days of storage. The conjugated dienoic acid content of the flour lipid had increased due to lipid oxidation during dark storage. Hydrolysis of neutral lipids and glycolipids, and lipid oxidation, were higher in the flour stored at Aw 0.8 than in the flour stored at Aw 0.3 or 0.5.
A Study on the Quality Characteristics of Brand and Non-brand Korean beefs
Kim, Mi-Hyun ; Song, Hyo-Nam ; Rho, Jeong-Hae ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 187~194
The quality characteristics of brand and non-brand Korean beefs, found in retail circulation, were studied via physicochemical and microbiological analysis and sensory tests. The average price of 100 g of brand Korean beef sirloin was 7.6 USD (1USD=950won), while the price of non-brand Korean beef was 3.1 USD. The fat content of the brand beef seemed to be higher, yet the difference was not significant. In both the brand and non-brand beefs, pH levels were approximately 5.27 We found that lightness (Hunter L value) tended to be higher in the brand beef, but again, this difference was not significant. For the cooked beef texture, the brand beef seemed to have lower gumminess, and had significantly less fracturability, than the non-brand beef. Significant differences could not be found with regards to microbiological stability between the two types of beef. In the raw beef sensory test, significant differences were identified for meat color, fat color, fat in muscle, flavor, and general preference. Also, the after cooking sensory test showed that brand beef had better characteristics for color, flavor, juiciness, softness, taste, chewiness, and preference.
Analysis of Elementary School Dietitians' Sanitary Practices and Perceptions of Obstacles According to the HACCP System in Gwangju and Jeonnam Regions of South Korea
Kim, Sun-Hee ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 195~204
The objective of this study was to analyze dietitians' sanitary practices and perceptions of obstacles according to HACCP. Questionnaires were administered to 94 elementary school dietitians in the Gwangju and Jeonnam Regions of South Korea. The data were evaluated by a 5 scale Likert method and statistically analyzed The results of the study are as follows. Each subject was generally characterized as a university graduate 79.8%, with 10 to 15 years experience 37.6%, and in her mid to late thirties 39.4%. We found that direct management was the highest occurring form of food service system 96.8%. With regards to the type of food service operation quantitative service as 60.6%, and partial self-service was 30.9%, 89.4%of all served only lunch. In all, 93.6% of the teams collaborated, while their organic collaboration was 64.9%. When HACCP was applied, sanitary practices scored an average of 4.83, which was significantly higher than 4.62 when HACCP was not applied. The dietitians' perception of sanitary practices was as very high 4.75 of 5. Sanitation, in regards to food management, scored 4.89 among the detailed items. This proves that in relation to food management, sanitation is considered most important. When HACCP was not applied, the perception of obstacles was, on an average, 3.07, which was higher than 2.74 when HACCP was applied. The results for the detailed items, which focused on sanitary practices and different perceptions of obstacles according to HACCP, were as follows. When HACCP was applied, a high mean of 3.32 occurred for facilities and utilities shortages followed by degree of cooperation at 3.22, and then monitoring at 3.01. The item that dietitians viewed as the biggest obstacle was lack of departmental budget support (M=3.46). Other serious obstacles were facilities, facility sanitation, and utility shortages (M=3.38), as well as the aappropriateness of machines and cooking utensils and arrangements in the dining room (M=3.28). Stepwise multiple regression was used to better understand how much these perceptions of obstacles would influence sanitary practices when HACCP was applied. The item analysis of the HACCP obstacles proved that persons involved in food service, except the food service employees, didn't cooperate enough with their food service employees. As a result, this lack of cooperation had a negative effect on sanitary practices. Accordingly, it is necessary to determine the causes of for lack of cooperation and attract the active attention of those involved.
Perceptions of residents in the Chungcheong area on commercialization of traditional Korean foods as convenience foods
Lim, Young-Suk ; Han, Gwi-Jung ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 205~220
This study was conducted to examine the perceptions of residents in the Chungcheong area on the commercialization of traditional Korean foods as convenience foods. Data was gathered using a questionnaire designed to evaluate the concerns, satisfaction, and Knowledge of traditional Korean food as well as the perceptions on commercialization of Korean traditional foods as convenience foods. In order to measure traditional food recognition and interests related to health, a 5-point Likert scale was employed and 374 subjects were surveyed. The results are summarized as follows : Most of the respondents expressed concerns for traditional Korean foods. In the over 50 age group, degree of interest (p<0.01), knowledge (p<0.01), and satisfaction (p<0.01) with regards to traditional foods was higher than in other age groups. The professional group had higher degrees of interest, knowledge, and satisfaction about traditional foods than the general group. Based on monthly income, for respondents earning over 3,010,000 won/month, the knowledge rating for traditional foods was higher than in the under 3,000,000 won/month group. The professional group had a more positive view of the commercialization of traditional food as convenience food than the general group. Respondents deemed quality improvements and an increase in consumption as reasons for the commercialization of traditional foods. Those with a greater recognition of traditional foods also had a higher degree of interest for the foods. Efforts for the commercialization of traditional Korean foods will help with consumer menu choices menu development and systems management of Korean traditional foods.
Antioxidant Effect of Histidine Containing Low Molecular Weight Peptide Isolated from Skipjack Boiled Extract
Cheong, Hyo-Sook ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 221~226
This study was carried out to investigate the optimun conditions for the isolation of low molecular weight peptides containing histidine, and to evaluate the antioxidant effects of skipjack boiled extracts(SBE). The results are summarized as follows : L-histidine contents of the ordinary muscle and dark muscle extracts were
, respectively. The L-histidine level of the dark muscle was much lower than that of ordinary muscle in the SBE. The extracts were treated with alcalase and neutrase under different pH levels, temperatures, and times. The optimum hydrolysis conditions of SBE were pH 7.0 and a
C temperature for 2 hr in the batch reactor, which hydrolyzed 63% of the SBE. HPLC analysis showed a removing effect of the ultrafiltration permeate (UFP) to high molecular weight impurities in SBE. SBE and pure carnosine participated as inhibiting agents to, which was confirmed through the autoxidation processing of linoleic acid. UFP treatment improved the inhibiting ability of SBE to the autoxidation of linoleic acid. The reducing power of the UFP-treated ordinary muscle extracts were 10-fold higher than the dark muscle extracts, and 0.7-fold higher than 20 mM pure carnosine. The UFP-treated ordinary muscle extracts had greater reducing power activity than pure carnosine. The scavenging activities on DPPH radical of the different treated-SBE and pure carnosine were also investigated. Scavenging activities of the ordinary and dark muscle extracts and the pure carnosine were 90%, 70%, and 45%, respectively. In summary, Skipjack boiled extracts (SBE) demonstrated that low molecular weight peptides containing histidine are capable of inhibiting lipid oxidation. They also possessed effective abilities as free radical scavengers and reducing agents, and these activities may increase with increasing concentrations.
Fermentation Properties and In vitro Anticancer Effect of Kimchi Prepared with Potato
Chang, Sang-Keun ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 227~234
Potato kimchi, fermentation was carried out at
C for 15 days using various ratios of potato to kimchi (2.5%, 5%, 10%). The samples were determined according to the fermentation time, pH, acidity and growth of lactic acid bacteria in potato kimchi. The addition ratio of potato to kimchi had little effect on the pH, acidity or growth of lactic acid bacteria in potato kimchi. In comparison to baechu kimchi and mul-kimchi, the pH, acidity and growth of lactic acid bacteria was better in potato kimchi than in the other kimchi samples. The in vitro anticancer effect of potato kimchi was investigated using human cancer cells, AGS human gastric adenocarcinoma cells and HT-29 human colon adenocarcinoma cells. MTT assay revealed that the methanol extract of potato kimchi showed the highest anticarcinogenic effects.
A Study on Seoul university students' recognition on passage rites and foods-funeral rites and sacrificial rituals
Kim, Mee-Jeong ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 235~244
This study was performed to investigate Seoul undergraduate students' thoughts on funeral rites and sacrificial rituals as well as ritual foods. A total of 542 students offered answers that the importance of sacrificial rituals was connected to filial piety for the ancestor, the customs descended from the past, and the belief that descendents received fortunes. The students didn't know the funeral rites process, but acknowledged they needed to know funeral rites, and would perform their parents' sacrificial rituals. We also found that students whose hometowns were Gangwondo and Jejudo were familiar with sacrificial rituals foods as well as their preparation and cooking. Also, the older the students, the better they knew the funeral rites process, sacrificial rituals and ritual foods. There were great differences in sacrificial rituals according to parent and student religions. Buddhists knew the most about funeral rites and sacrificial rituals, followed by Roman Catholics and agnostics. Protestant Christians were not interested in sacrificial rituals. The funeral rites process and the handing down of sacrificial ritual foods had significant differences based on sibling number. The more brothers and sisters in a family, the more committed they were to performing their parents' sacrificial rituals and the higher their interest in sacrificial ritual foods.
Changes in glycoalkaloid contents of 'Superior' potato tubers by storage
Kim, Joung-Ae ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 245~251
The purpose of this study was to examine how potato glycoalkaloid(PGA) contents changed as storing temperatures and periods changed for potatoes(Superior) cultivated in Korea. Some potatoes were stored at
C for 80 days, and others were stored at
C for 40 days. PGA contents were measured every 20 days for the potatoes stored at
C and 10 days for those stored at
C. The results can be summarized as follows. The amounts of a-chaconine and a-solanine measured on the first day of storage were 54.22 mg/100 g and 26.57 mg/100 g, respectively. Thus, the a-chaconine content was almost twice as much as the a-solanine content. The sprouts of potatoes stored at
C grew by 0.4 cm in 20 days, 1 cm in 40 days, 1.8 cm in 60 days, and 5.2 cm in 80 days. Furthermore, the PGA content increased by 3.5% in 20 days, 11.6% in 40 days, 23.4% in 60 days, and 41.4% in 80 days, compared to the PGA content on the first day. The sprouts of potatoes stored at 20 grew by 0.5 cm in 10 days, 2.3 cm in 20 days, and 7.4 cm in 40 days. Furthermore, PGA content increased by 12.5% in 10 days, 36.6% in 20 days, 44.8% in 30 days and 48.4% in 40 days, compared to the PGA content on the first day. Thus, we determined that potatoes stored at
C showed faster sprout growths and faster increases in PGA content than those stored at
Changes in the Microbial Qualites and Sensory Characteristics of Boiled Potatoes and Imitation Crab Sticks in Soy Sauce as Prepared by the Cook-Chill System and Sous Vide Cook-Chill System
Kim, Heh-Young ; Song, Sun-Mi ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 252~260
This study was performed to provide basic data for the operation of the sous vide cook-chill system(SVCC) by comparing and evaluating the quality of SVCC prepared foods to those prepared using the cook-chill system(CC). Foremost, the microbial risk was less and the food quality excellent when SVCC was used compared to CC, where changes in pH, Aw and moisture loss were less with SVCC. The CC and SVCC Aw value were 0.93 and 0.92 and 0.92 and 0.95 at 0 days and 15 days, respectively. Secondly, the microbial quality by storage days was relatively high with SVCC. The CC and SVCC viable cell and coliform counts were 4.43 and 4.37 LogCFU/g, and 4.53 and 3.60 LogCFU/g, respectively, by 15 days. Also, after reheating, the viable cell and coliform counts satisfide the standards applied in processed food(5.0 and 2.0 LogCFU/g respectively). Lastly, the sensory scores for SVCC were higher than those for CC. Thus, microbial and sensory qualities by days of storage were acceptable and overall quality satisfaction was better for SVCC than CC.
Changes in the Microbial Qualities and Sensory Characteristics of Boiled Quail Egg and Fish Paste in Soy Sauce as Prepared with the Cook-Chill System and Sous Vide Cook-Chill System
Song, Sun-Mi ; Kim, Heh-Young ; Ko, Sung-Hee ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 261~269
This study was performed to provide basic data for the sous vide cook-chill(SVCC) System by comparing and evaluating food quality, according to preparation method and days of storage, of foods that were prepared by SVCC to those prepared using the cook-chill(CC) System. Boiled quail eggs and fish paste in soy sauce were prepared using CC and SVCC and their quality was evaluated at the time of preparation and by days of storage. Viable cell counts were increased to 5.65(CC) and 3.40(SVCC) LogCFU/g by 15 days(p<.0001) and increased more over time in foods prepared with CC than with SVCC. For the CC method, Coliform counts increased to 4.58 LogCFU/g by 15 days(p<.0001). With SVCC, colirorms were not detected at 0 days, but counts reached 3.70 LogCFU/g by 15 days(p<.0001). After reheating, no coliforms were detected for CC or SVCC at 0 days, however, by 15 days, coliform counts reached 3.61 and 2.52 LogCFU/g(p<.0001) for CC and SVCC, respectively. Finally, the sensory scores of SVCC were higher than those of CC.
Analysis of profitability and its affecting factors in restaurant franchise firms
Park, Hyun-Jeong ; Shin, Seo-Young ; Yang, Il-Sun ; Choi, Kyu-Wan ;
Korean journal of food and cookery science , volume 23, issue 2, 2007, Pages 270~279
The purposes of this study were to analyze the profitability of audited restaurant franchise firms and to investigate the financial variables affecting profitability. This study decomposed profit variation into the three main factors comprising the Du Pont Identity (operating efficiency, asset use efficiency and financial leverage). The operating efficiency of restaurant franchise firms was on the rise until 2004, but dropped dramatically in 2005. Especially, the profit margin dropped from 13.46% in 2004 to 6.54% in 2005. The asset use efficiency has been decreasing since 2003. The total asset turnover ratio, which can be indicative of over-investment, dropped from 1.55 in 2003 to 1.50 in 2005. The financial leverage remained stable after 2002. There were major differences in debt accumulation among the firms, and the current level of debt was thought to be higher in the restaurant industry than in other industries. Based on the results of a multiple regression analysis, we concluded that the factors affecting ROE were the debt-equity ratio, total asset turnover and the size of the firm. The debt-equity ratio and total asset turnover had a significantly positive effect on ROE, while the firm size had a significantly negative effect on ROE. However, the current ratio and sales growth rate were not significant. The finding that firm size and profitability were negatively related implied that restaurant franchise firms should pursue qualitative growth rather than quantitative growth. There was no major difference in profitability between domestic brands and foreign brands. However, the domestic brand was more efficient in terms of asset usage than the foreign brand.