• Korean Journal of Poultry Science
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• v.13 no.2
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• pp.221-226
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• 1986

In order to study the effect of feeding moldy corn in the feed and to compare the efficacy of several antidotical treatments, a feeding trial was conducted using broiler chickens. Ground yet low corn was adjusted to contain 20% moisture and then incubated at 35$^{\circ}C$ for 20 days. The number of fungi increased from 11${\times}$10$^4$/g to 42 10$\^$7/g on incubation but aflatoxins (B$_1$, B$_2$, G$_1$, G$_2$) were not detected by TLC test. Moldy corn was included in the experimental diets at the level of 7% with various treatments. Thirty six hatched male broiler chickens were divided into 6 groups and each group was placed for 4 weeks on one of the following treatments: Fresh corn, Moldy corn, Ammoniated (1.5%) moldy corn, Moldy corn＋BHT (0.1%), Moldy corn CTC (100ppm) and Moldy corn＋Probiotics. Weight gains of the birds fed Ammoniated moldy corn diet, Moldy corn＋Probiotics dist and Moldy corn＋CTC diet were greater by 6.1%. 7.6% and 3.9% respectively than those fed Moldy corn diet. The feed efficiencies of Moldy corn＋Probiotics diet and Moldy corn＋CTC diet were better than those of Moldy corn diet. Dry matter contents of the livers of the birds fed Ammoniated moldy corn diet, Moldy corn＋BHT diet and Moldy corn diet were lower than those of other treatments. Proteion contents of the livers of the birds fed Moldy corn diet, Moldy corn ＋CTC diet and Moldy corn＋BHT diet were lower than those of other treatments. Moldy corn tended to increase fat content of the livers.

• Journal of Bio-Environment Control
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• v.15 no.2
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• pp.177-183
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• 2006

The summer production of sweet pepper in Korea which cultured in the highland area such as Hapchon is essential for a year-round export, but has the problem, fruits lose easily those marketability. This study was carried out to find changes of fruit quality in response to storage on sweet pepper cultivars in summer. Seven cultivars of sweet peppers, 'Jubilee', 'Plenty', 'Goal', 'Romeca', 'Derby', 'Midas' and 'Maximalia' were obtained iron growers in Hapchon which was highland of 600-800m from sea level and stored at $10^{\circ}C$ with box packing. Fruit quality was evaluated every 4days up to 4weeks. The weight loss of 'Jubilee' was the lowest, that of 'Romeca' was the highest. The firmness of 'Goal' was maintained highly for 4weeks and the red cultivars was higher than those of other color cultivars. The lightness of 'Jubilee' was sensitively affected by storage duration. Seeds of 'Plenty' and 'Derby' were plentifully browned after 4weeks storage. The occurrence of fruit rotting was after 16-204ay storage and those of 'Plenty' and 'Maximalia' were the earliest. The marketability of 'Jubilee' and 'Romeca' maintained by 70% for 16 days was the highest, but most cultivars lost those by 20% after 24days storage. It may be suggested that the marketability of sweet pepper producted in summer can be stored at $10^{\circ}C$ for 2weeks to maintain that of 80%.

• Journal of the Korean Society of Food Science and Nutrition
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• v.21 no.6
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• pp.633-638
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• 1992

This study was conducted to evaluate the effect of dietary supplementation of vitamins A and E on hepatic lipid metabolism in adriamycin (ADR)-treated rats. Male Sprague-Dawley rats were assigned to 5 groups according to the dietary supplementation of vitamin A or E. Except control rats, a dose of 2mg ADR/kg of B.W. was injected to these animals intraperitoneally in the same day every week. Lipid peroxide values of liver were elevated by ADR treatment. But dietary supplementation of vitamin A or E significantly reduced these values. Catalase activity in rat liver was increased by ADR treatment, but glutathione peroxidase (GSH-Px) activity was decreased. This effect was somewhat modified by feeding dietary vitamin A or E. Superoxide dismutase (SOD) activity in rat liver was not changed by ADR treatment, but the combined use of ADR, vitamins A and E significantly induced this activity. Fatty acid composition of liver mitochondria was not affected by ADR treatment. The contents of hepatic triglyceride and cholesterol were elevated by ADR treatment. Dietary vitamin A reduced the increased hepatic triglyceride and cholesterol contents in ADR-treated rat.

• Korean Business Review
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• v.11
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• pp.217-239
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• 1998

The intial public offerings(IPO) issued by going public must be decided duly and seriously. In these sense, this paper reviewed and analysed synthetically the theories and the empirical studies on the IPO. The implications about the empirical studies on the IPO in korea stock exchanges(KSE) are as follows: First, evaluating the IPO's intrinsic value, the issued firm's characteristics(style, scale, age, reevaluation and goodwill etc.) and business environments(industry, economic states, regulations and the relation with government etc.) will be considered. Evaluating the IPO's relative value, the stock price of firms registered in KOSDAQ market will be appreciated. Second, the income smoothing of an IPO listed in KSE accrued in the first and second years. Accordingly if auditors audit the accounting reports of firms to list in KSE by going public, they should more concern to the income smoothing on the accounting reports. Third, the information accuracy of investment banks and the qualities of auditors negatively correlated with the underpricing of an IPO. It is need to promote the information accuracy of investment banks and the qualities of auditors. Regulatory organizations support to promote the information accuracy of investment banks and the qualities of auditors. Forth, the investors interested in the IPO are to recognize the follows. (1) Relations between the underpricing of an IPO and the ratio of public participation, the issue price, the offer size, the insider ownership, the net asset value per share, the price decision system of an IPO. (2) An entrepreneurs who decided to bring his firm public would like to issue the IPO when company's operating conditions are good.

• Korean Journal of Food Science and Technology
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• v.37 no.5
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• pp.806-811
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• 2005

Effects of green tea-soybean paste on weight-changes and serum lipid profiles in rats fed high fat diet were investigated. Sprague-Barley male rats divided into five groups were fed five different diets for 10 weeks: B group, basal diet H group, high fat-diet containing 0.5% cholesterol+15% lard H-S group, high fat diet containing soybean paste H-0.6GS group, high fat diet containing 0.6% green tea-soybean paste H-4GS group, high fat diet containing 4% green tea-soybean paste. H group showed highest weight gain (p<0.05). Addition of green-tea soybean paste to high-fat diet significantly decreased weight gain, H-4GS group showing highest weight loss (p<0.05). No significant differences in food efficiency ratio and total food intake were found among groups. Liver weight of H group was highest. Addition of green tea-soybean paste to high fat diet significantly reduced liver weight (p<0.05, Table 2). Concentrations of glucose, uric acid, bilirubin, and total protein were similar among all group. Mean GPT values of H-4GS group were significantly different from these of H- and H-S groups (p<0.05). H-S, H-0.6GS, and H-4GS groups had significantly lower triglyceride and total cholesterol, and higher HDL than H-group (p<0,05). H-4GS group had significantly lower serum triglyceride than H-0.6GS group (p<0.05).

• KOREAN JOURNAL OF CROP SCIENCE
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• v.21 no.1
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• pp.35-42
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• 1976

In Korea, two types of rice varieties are being cultivated widely, Japonica and Japonica-Indica cross. Generally speaking, the latter shows weak cold tolerance than the former and so brought about many problems in cultural practices. This study was conducted to investigate the effect . of various temperature conditions on rice seedlings growth, especially the contents of chlorophyll and the percentage of nitrogen. And the result obtained indicated the varieties of Japonica-Indica intend to weak cold tolerance than Japonica varieties.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.9
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• pp.6227-6235
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• 2015

The HUD has recently been downsized due to the development of micro display and LED technology as a see through information display device, gradually expands the application areas. In this paper, using a DLP micro display device designed a compact head-up display(HUD) optical system for biocular observation of the image exhibition area 5 inches. It was analyzed for each design element of the optical system in order to design a compacted HUD. DLP, projection optical system and concave image combiner were discussed the design approach and the characteristics. Through a connection structure analysis of each optical system, detailed design specifications were set up and designed the optical system in detail. Put a folded configuration in the form of a white diffuse reflector between the projection lens and concave image combiner was designed to be independent, respectively. Distance of the projected image is adjustable up to approximately 2m ~ infinity and observation distance is 1m. Resolution could be recognized by 1 ~ 2pixels in HD($1,280{\times}720pixels$) class, various characters and symbols could be read. In addition, color navigation map, daytime video camera and thermal imaging cameras can be displayed.

• Communications for Statistical Applications and Methods
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• v.17 no.2
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• pp.293-308
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• 2010

In this paper, we examine the forecasting KOSPI 200 realized volatility by volatility measurements. The empirical investigation for KOSPI 200 daily returns is done during the period from 3 January 2003 to 29 June 2007. Since Korea Exchange(KRX) will launch VKOSPI futures contract in 2010, forecasting VKOSPI can be an important issue. So we analyze which volatility measurements forecast VKOSPI better. To test this hypothesis, we use 5-minute interval returns to measure realized volatilities. Also, we propose a new methodology that reflects the synchronized bidding and simultaneously takes it account the difference between overnight volatility and intra-daily volatility. The t-test and F-test show that our new realized volatility is not only different from the realized volatility by a conventional method at less than 0.01% significance level, also more stable in summary statistics. We use the correlation analysis, regression analysis, cross validation test to investigate the forecast performance. The empirical result shows that the realized volatility we propose is better than other volatilities, including historical volatility, implied volatility, and convention realized volatility, for forecasting VKOSPI. Also, the regression analysis on the predictive abilities for realized volatility, which is measured by our new methodology and conventional one, shows that VKOSPI is an efficient estimator compared to historical volatility and CRR implied volatility.

• Korean Journal of Veterinary Research
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• v.36 no.4
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• pp.839-844
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• 1996

This study was designed to investigated the effects of cadmium(Cd) feeding on the humoral immune responses such as PFC-responses and production of immunoglobulins in BALB/c mice. The results obtained were summarized as follows; 1. Total PFCs of direct IgM antibody response were significantly decreased in all Cd-fed goups, whereas total PFCs of IgG antibody response were slightly increased. 2. In secondary immunization, total HA titers were increased in all Cd groups as compared with control, especially in 100ppmm group and also IgG titers were slightly increased except for 50ppm group. 3. The levels of $IgG_1$ were increased to 5.5% 18.7%, 17.4% and 7.2% in 25, 50, 100 and 200ppm groups as compared with control, respectively. And also the levels of IgE were increased to 5.7%, 7.3%, 8.7% and 0.4% in those of Cd groups, in order. Conclusively, concentrations of $IgG_1$, and IgE were increased in all Cd groups. Based on the results of this study and previous report, it was shown that Cd might affect humoral immune responses by modifying the distribution and function of cells playing in the cellular immune response.

• The Journal of the Korea Contents Association
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• v.19 no.3
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• pp.336-348
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• 2019

This study aimed to verify the effects of design thinking-based team project learning on nursing college students' empathy and proactivity of problem solving. This study also examined the subjects' experiences obtained from participating in team project activity through reflective analysis. The research was a one-group, pre-and-posttest design. The subjects were 64 seniors majoring in nursing studies in N university who had attended the course of nursing management practice. During the course, they participated in a design thinking team project for a total of 10 sessions for two weeks, five times per week, and one and a half hour per day. Data was analyzed using SPSS Win 22.0, a paired t-test was conducted and Pearson's correlation coefficients were calculated. Content analysis was carried out on their experiences obtained from participation in team project activity. The subjects' empathy(t=-2.94, p=.005) and proactivity of problem solving(t=-6.23, p<.001) showed statistically significant difference between before and after the design thinking-based team project learning and had significant positive correlation(r=.634, p<.001). Analysis of team reflection revealed four themes: design thinking, empathy, problem solving ability, and critical thinking. This study verified that design thinking-based team project learning was very effective in developing nursing college students' empathy and proactivity of problem solving. Research Results Design Thinking Based on team learning, project learning is an effective teaching learning method for finding and defining customer needs, creating a solution to problems, and enhancing engagement and empathy through various stakeholder collaborations I could.