• Journal of the Korean Society of Food Culture
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• v.21 no.6
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• pp.623-628
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• 2006

• Korean Journal of Food Science and Technology
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• v.14 no.4
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• pp.330-335
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• 1982

A powdered beverage with afruit flavor was stored at 4, 21, 35 and $45^{\circ}C$ for 180 days to study ascerbic acid destruction at the selected temperatures. Degradation of ascorbic acid in the model followed the first order reaction, and the temperature dependence of reaction rate constants at tested temperatures was accounted for by the Arrhenius equqtion. The calculated activation energy for the destruction of ascorbic acid was 3.3 Kcal/mole. The relationship between ascorbic acid content and sensory flavor score of the beverage indicated that samples with destruction of ascorbic acid over 25% showed objectionable flavor. An attempt was made to predict the quality of powdered beverage by using a simulation model. A comparision between ascorbic acid values from shelflife tests and the simulation program showed a good agreement within acceptable error. This result demonstrated that quality of powdered beverage could be predicted by using a computer simulation model with a desired accuracy.

• Journal of the Korean Society of Food Science and Nutrition
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• v.46 no.11
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• pp.1366-1372
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• 2017

This study compared the physicochemical quality characteristics of the Omija beverage for 36 weeks (9 months) depending on the storage container and storage temperature. From 3 weeks of storage, the optical density showed a significant difference according to the storage container, and the soluble solid contents showed a significant difference according to the storage container, storage temperature, and storage container${\times}$temperature. The total polyphenol and total acidity decreased slightly in the late storage period at all transparent and brown bottle treatments but the pH increased slightly. Generally, changes in the quality characteristics of Omija beverage at $4^{\circ}C$ storage were less than that at $20^{\circ}C$ and $36^{\circ}C$ storage. Correlation analysis of each factors, optical density, soluble solid content, total polyphenol, pH, and total acidity showed a positive correlation with each item according to the storage period. The storage period, particularly the transparent bottle treatment, appeared to have a significant impact on reducing the optical density. A few quality changes were observed after the brown bottle treatment for 36 weeks. In addition the stability according to the storage temperature was confirmed in each treatment. The brown bottle treatment is effective in maintaining the quality of Omija beverage for 36 weeks.

• Korean journal of food and cookery science
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• v.20 no.3
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• pp.271-278
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• 2004

As an attempt to develop new functional beverages for breakfast, sweet potato based beverages were prepared with hydrolyzed sweet potato, potato, and carrot products (sample : water = 1 : 1), and their chemical and sensory properties were evaluated. The content of reducing sugar and soluble solid of the sweet potato, potato, and carrot increased with enzyme treatment, while their viscosity decreased without significant change of color. The hunter color test showed that the beverages with 10％ carrot content were high in redness leading to a decrease in their acceptability for sensory evaluation. The sensory score of the mixture containing 5％ carrot was good, but beverage with 0％ carrot reduced the sensory properties. The results showed that the final ratio of sweet potato to potato to carrot for the new functional beverage was 5 : 4.5 : 0.5. The pH of the beverage was adjusted to 5.0, 4.5, and 4.0 using an organic acid mixture. In the sensory test of the new functional beverage, the best sensory score(color, taste, smell, and texture) was the mixture of sweet potato : potato : carrot equaling 5 : 4.5 : 0.5 with a pH of 4.5.

• Journal of Applied Tourism Food and Beverage Management and Research
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• v.12 no.2
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• pp.59-78
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• 2001

The domestic food service industry has established its industrial basis since the overseas brands were introduced and international events were held in Korea. It also has showed a prominent growth rate as consumers began to show more interests in leisure and quality of working life(QWL) At this, the employees, constituting Points of contacts with consumers of the food service industry, have emerged as a Primarily critical concern in order for the food service industry, which can affect people in various ways, to adopt our own food culture and develop its business quality. In the food service industry, as a relatively labour-intensive industry, the manpower service is considered very important. Whether the industry succeeds or not depends on the role of employees as the quality of service of employees can decide the quality of the industry itself. In spite of the importance of employees in the food service industry, not many researches have been Performed on the personnel management of the industry, as Koreans traditionally have hold a prejudiced view on the food service industry and it is only a short time since the food business began to be considered as an industry. This thesis aims at research on the factors affecting job satisfaction of the employees by dealing with the importance and characteristics of the role of employees of the food service industry and theoretical background of the job satisfaction. The presumable factors affecting the job satisfaction are divided into several groups ; characteristics of organization, working condition, human relationship, psychological factors, and its reputation in the labour market. Hypotheses and models, where those factors affect the employees, are formed. Statistical methods such as correlation analysis and multiple regression are used in order to verify those hypotheses. Alternatives to improve job satisfaction of employees are suggested based on the analysis. It is expected that there will be more active researches on employees of the food service industry, as this thesis has selected employees of the food service industry as its subjects while subjects of similar researches have been mainly hotel employees so far.

• Journal of Applied Tourism Food and Beverage Management and Research
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• v.7
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• pp.41-59
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• 1997

After the industrial revolution, we have changed whole life-styles. This trend has brought a change in our eating style. Nowadays, the great number of people go out to eat-even three meals a day. As a result, the growth rate of food service industry increases day by day. Some restaurants are managed by the large scale company and others by the small scale ownership. Though developed countries are in the maturity step of the product life cycle in this field, we are in the growth step. We will hold the in 2002. A lot of tourists and the press will rush to Korea. They must have their meals at the restuarant. Therefore, we need more practice to satisfy them and to lead to successful management in this field. Also, we need an evaluation to qualify each business so that our food service industry does not decline compared to other country's. This study is trying to find how to evaluate and qualify each business in the various areas: service, the quality of food, the mood of the restaurant and so on. In addition, it includes the restaurant rating form.

• Journal of the Korean Society of Food Culture
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• v.16 no.4
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• pp.371-377
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• 2001

Li was a sweet beverage containing $2{\sim}3$ percents ethyl alcohol made from malt by spontaneous fermentation from ancient custom to fifteenth century. Li was changed to the rice wine being a sweet beverage of low alcohol content using nuruk as starter and the sikhae which is non-alcoholic fermented beverage. Li was made for drinking and ceremony in Korea, China and Japan. It disappeared from the beverage items along with its method of manufacture from malt, but in Korean had made Li using nuruk until recent. We made Li according to Book of Imwon-Keongjae Ji (The book of country economy) methods for reappearance of Li. Fermentation characteristics for the production of Li with Saccharomyces cerevisiae, Saccharomyces bayanus and Saccharomyces sake were investigated. Among the yeast strains tested, Li fermented with S. sake showed higher alcohol production. Total sugar decreased considerably during the whole period of fermentation(30 hours), while ethyl alcohol content increased at $2.98{\sim}3.52%$. As the fermentation progressed, the pH decreased until the 30 hours of fermentation, while total acid increased during the same period. In fermentation of 36 hours, Li consisted of about $2.98{\sim}3.52%$ of alcohol content, $5.3{\sim}6.0%$ of total sugar, $1.45{\sim}2.21mg%$ of reducing sugar and total acidity were reached up to $24.4{\sim}29.5mg%$ for Li manufactured with S. cerevisiea sake, S. bayanus and S. sake.

• Korean Journal of Food Science and Technology
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• v.45 no.1
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• pp.70-76
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• 2013

The aim of this research was to analyze makgeolli with nineteen kinds of rice and koji. Among 19 rice, 18 rice were domestic products and one rice was an import. For the properties of koji made with 19 kinds of rice, the acidity was over 5.0 and the saccharogenic power was more than 60SP. Makgeolli brewed with 19 kinds of rice and the koji of each rice were analyzed for alcohol contents, pH, total acidity and solid contents during fermentation. After fermentation, raw liquor's alcohol degree was set 6.0%, the pH ranged 3.47-3.76, the total acidity 0.27-0.44%, the solid contents and the reducing sugar were $2.7-4.6^{\circ}$Bx and 2.49-6.01 mg/mL. Organic acid was detected 5 kinds (oxalic, malic, lactic, acetic, succinic acid) and free sugars were found such as glucose, maltose and fructose. Hwayoung, Hopum and Sura were higher than the residue in 15 kinds of rice in the preference test.

• Journal of the East Asian Society of Dietary Life
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• v.18 no.6
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• pp.1072-1080
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• 2008

The optimization of the addition ratios of Houttuynia cordata, Saururus chinensis, and Polygonatum odoratum var. pluriflorum hot water extract to Houttuynia cordata beverage was evaluated by applying response surface methodology. The quality characteristics of a selected best product were investigated. Sweet, savory, and fishy taste, and overall acceptability were optimized by response surface methodology using a central composite design. The concentration of effect of Houttuynia cordata, Saururus chinensis, and Polygonatum odoratum var. pluriflorum hot water extract was modeled using an equation. Hot water extracts of Houttuynia cordata ($1.75{\sim}1.89%$), Saururus chinensis ($1.03{\sim}1.04%$), and Polygonatum odoratum var. pluriflorum ($2.17{\sim}2.31%$) represented the optimal concentration conditions to obtain the best taste. The physical and chemical characteristics of the beverage manufactured at optimized conditions were pH 4.18, soluble solids 0.41 $^{\circ}Brix$, total acidity 0.21%, color value ($L^*$ value 40.08, $a^*$ value 4.53, and $b^*$ value 10.69), total polyphenol 54.63 mg/L, and electron donating ability 26.98%.

• Journal of the Korean Society of Food Culture
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• v.20 no.6
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• pp.661-667
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• 2005

This study was to examine the effect of the environmental characteristics on overall quality of employee and food service in Korean foodservice firms. The four factors of the environmental characteristics of Korean foodservice firms consist of service, atmosphere, food & beverage, and event. To analyze the data collected from 414 respondents, the several statistical methods were used including frequency and descriptive analysis, factor analysis, reliability test, and multiple regression analysis. The empirical results are as follows: First, the employee service factor has a significantly positive effect on overall employee service quality. Second, the food & beverage factor has a significantly positive effect on overall employee service quality. Third, the food & beverage factor has a significantly positive effect on overall food & beverage service quality. Fourth, the event factor has a significantly positive effect on overall food & beverage service quality Managerial implications can be drawn from the present data. First, Korean restaurant managers can identify which factors of environmental characteristics influence customers' attitudes and evaluations in service encounter. Second, Korean restaurant managers can use the environmental characteristics as differentiation strategy, and allocate their resources into the activities of marketing strategy.