• Korean journal of food and cookery science
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• v.9 no.1
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• pp.7-13
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• 1993

This survey was performed to investigate the holding amount of the various kinds of cooking tools of the farm and fishing villages in Chungnam area. The results were as follows: 1. The holding ratio of refrigerators was the highest (97.9%), and that of toasters was the lowest (1.9%) among the electric tools. 2. The holding ratio of gas-ranges was the highest (95.7%) and that of gas oven-ranges was the lowest (1.2%) among 4 kinds of gas tools under investigation. 3. The holding amount of pans was the highest among the cooking tools and that of wicker baskets was very high among the small cooking tools. The holding ratios of egg-cutters and lemon-squeezers were very low (4.1% and 2.9%, respectively). 4. The holding ratios of various kinds of cooking tools were related to the housewife's educational background and family income.

• Korean journal of food and cookery science
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• v.13 no.4
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• pp.434-439
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• 1997

The changes in thiamin content of an experimental product, 'Nuhbiani' were measured at the end of the process of simulated home prepared precook/storage/reheat system. The retention of thiamin in Nuhbiani after reheating by pan or microwave were compared. Statistical analyses indicated that there were no significant differences in thiamin contents due to the method of precooking and reheating. However, there were significant thiamin losses due to the storage period but no differences between the storage conditions. There were significant thiamin losses after 7 days of refrigeration (p < .05). The points causing significant thiamin losses in food product flow were precooking and 7 days of refrigerated storage.

• Survey Research
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• v.5 no.1
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• pp.27-49
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• 2004

Recently, in several countries including South Korea, the percentage of households having fixed telephones, which is often called the fixed telephone coverage rates, has decreased due to a rapid spread of mobile phones. It is generally assumed that the lower the rates of coverage, resulting in a major frame undercoverage problem, the greater the possibility of the bias. In this paper, we first take a look at the changes of coverage rates in both fixed telephones and mobile phones in South Korea and examine the coverage rates by sociodemographic characteristics of households. Also, we refer to a change in the level of fixed telephone noncoverage and the resulting problems in the situation. Second, we provide a comparison of the coverage rates for households for some European countries, the United States, Canada etc. Finally, we suggest further research to rise to our research environments increasingly troublesome, owing to the wide spread of mobile phones.

• The Journal of the Korea Contents Association
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• v.19 no.4
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• pp.394-402
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• 2019

This study examines the effect of managerial ownership on the value of firms' cash holdings. According to the management entrenchment hypothesis, managers have incentives to make decisions that can undermine shareholders' value for their own private interests. In this situation, as the managerial ownership increases, investors may evaluate that the cash held by the company may be utilized inefficiently and the value of the cash holdings may decrease. On the other hand, based on the incentive alignment hypothesis, the value of cash holdings may increase as investors perceive cash holdings to be effectively used to increase corporate value as managers' interests are in agreement with shareholders. Empirical results show that the value of cash holdings decreased as managerial ownership increased. This study finds a contribution in that it presents empirical evidence on whether the cash held by the company is differentially evaluated according to the level of the managerial ownership.

• The Journal of the Korean Society for Microbiology
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• v.12 no.1
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• pp.51-56
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• 1977

1. The total 1,204 of human sera from January to December, 1976 of the out-patients in St. Mary's Hospital were tested one by one. The total 57.6% of the 1,204 cases were confirmed as a hemagglutination inhibition antibodies, and 58.18% out of 574 male cases and 57.14% of 630 female cases were confirmed to have antibodies, respectively. 2. The monthly distribution of hemagglutination inhibition antibody was shown to be 91.2% out of 34 cases in October, 1976 but other months it was low. 3. In the group whose age was from 51 to 60, it was 64.6% and this shows that the group was markedly higher than others.

• 건강소식
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• v.4 no.7 s.33
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• pp.9-10
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• 1976

• Korean journal of food and cookery science
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• v.6 no.3 s.12
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• pp.95-104
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• 1990

This survey was performed to investigate the actual holding conditions of the electric tools, gas tools and small cooking tools in the four Korean big cities; Seoul, Pusan, Kwangju and Taejon. The results were as follows; 1. Each family had more than 8 items on the average, of 24 kinds of electric tools under investigation. The holding ratio of refrigerators was the highest (99.6%), and that of dish washers was the lowest (3.4%). 2. The holding ratio of gas-ranges was the highest(92.2%) and that of gas-ovens was the lowest (2.2%) of 4 kinds of gas tools under investigation. 3. Each family had more than 45 items on the average, of 86 kinds of small cooking tools under investigation. The holdings ratios of openers and wicker baskets were very high (98.2% and 96.6%, respectively), and those of noodle tools and Shinsonros were very low (13.8% and 13.6%, respectively). 4. The holding ratios of various kinds of cooking tools had interrelations with the size of city, housewife's educational background, family income, house style, private residence, etc.

• Journal of Nutrition and Health
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• v.18 no.2
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• pp.139-146
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• 1985

This study was attempted to investigate the effect of fermentation of soybean on protein and mineral bioavailability. The traditional, oriental fermented soybean foods, Meju and Tempeh, and isolated soybean protein( ISP ) and cooked soybean were prepared and fed to rats as sources of protein. The C-PERs of ISP, cooked soybean, Meju and Tempeh were 1.82, 1.98, 2.11, and 2.36, respectively C-PERs of fermented soybean products, Meju and Tempeh were higher than ISP and cooked soybeans. However, they were not significantly different The percent retention of protein of rats fed with casein, ISP, cooked soybean, Meju and Tempeh were 47.44%, 51.83%, 47.67%, 50.90% and 45.97%, respectively, showing no significant differences among the diets. The rates of calcium retention percent were 62.26%, 59.22%, 61.59%, 55.78% and 67.09 % in rats fed with casein, ISP, cooked soybean, Meju and Tempeh, respectively, demonstrating no significant differences. Rats fed with cooked soybeans did show significantly higher iron retention rate than other samples. However, this study failed to any significant increase in iron availability. The percent of fine retained in rats fed with ISP was significantly lower than those of rats fed with other diets, however, significantly high amounts of zinc were retained in rats fed with Tempeh compared with other diets. The percents of zinc, iron, calcium retained in the bones of rats were not significantly different among the diets.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.2 no.1
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• pp.40-45
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• 1999

Purpose: The aim of this study is to investigate the seroepidemiology of hepatitis A and hepatitis B in Korean children. Methods: 801 children aged 6 to 12 years were enrolled. IgG antibody to hepatitis A virus (anti-HAV), hepatitis B surface antigen (HBsAg), antibody to HBsAg (anti-HBs), and IgG antibody to HBc (anti-HBc) were measured by radioimmunoassay. Results: Of the 801 children, the seroprevalence of anti-HAV was 0%. Three (0.4%) were seropositive for HBsAg. The seroprevalence of anti-HBs was 61.8%. Two (0.4%) of 495 anti-HBs positive subjects were positvie for anti-HBc. Of the 801 children, 658 (82.1%) had received hepatitis B vaccination. Conclusions: Since natural anti-HAV is not acquired in the childhood, the outbreak of hepatitis A is possible in adolescents and young adults. The decrease in seroprevalence of HBsAg and the increase in seroprevalence of anti-HBs might result from hepatitis B vaccination program in childhood.

• Journal of Preventive Medicine and Public Health
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• v.16 no.1
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• pp.13-18
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• 1983

This study was attempted to define epidemiologically the possibility and the magnitude of sexual transmission of HBV in Korea. Two groups of prostitutes; one group (309) deals with Koreans, the other group (126) deals with American soldiers stationing in Korea, were tested for the presence of HBsAg and anti-HBs. The prevalence rate of HBsAg or anti-HBs was significantly higher in prostitutes who deal with Koreans (41.7%) than in prostitutes who deal with American soldiers (30.2%) (p<0.025). Among the prostitutes who deal with American soldiers, there was no appreciable difference in the prevalence rate of HBsAg or anti-HBs by the duration of prostitution. However, among the prostitutes who deal with Koreans, the prevalence rate was increased with the duration of prostitution, although it did not reach the statistically significant level (p=0.12). There was no remarkable association between the prevalence rate of HBsAg or anti-HBs and educational level, history of operation or history of transfusion. The data support the possibility of sexual transmission of viral hepatitis B but it seems seems sexual transmission does not contribute significantly to the prevalence rate of HBsAg or andi-HBs in Korea.