• Journal of Plant Biology
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• v.12 no.1
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• pp.31-34
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• 1969

This experimental was undertaken for the purpose to investigate the different chemical composition in developing fruit of Poncirus trifoiata. In the first place, the differences among the content of tannin and qualitative analysis of free sugars and organic acids in the fruit of Poncirus trifoiata fron Kwang-ju are to be investigated and chemical components are analyzed. 1) The differences of the content of tannin are investigated at the four periods of time and gradual decrease in the sample 2 (July 15) take place. 2) In sample 1 (June 20), xylose, mannose and rhamnose are not identified and later, as the fruit age, otehr three sorts of sugars with the former are founded and there is a conspicuous tendency to increase in the content and especially the increase in glucose and rhamnose seems to be related with the decomposition of tannin, while the decrease in the former from sample 2 to sample 4 with the formation of the latter. 3) Tartaric acid, succinic acid and citric acid are appeared and then in sample 1 (June 20( these are not founded and later all of them are identified and gradual increase in the content take place and especially citric acid and succinic acid seems to be increased in the content. These are related with the synthesis of organic materials in plant body.

• International Journal of Highway Engineering
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• v.15 no.1
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• pp.57-63
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• 2013

PURPOSES: This study is to investigate the Hot In-Place recycling asphalt mixture in Korea using field produced materials. METHODS: Hot In-Place reclaimed asphalt mixture was investigated to evaluate the mixture properties based on various test results such as Marshall Test, Indirect Tensile Test, TSR, and Wheel Tracking Test. These test values were compared with domestic standard specification. RESULTS: The result of the laboratory experiment indicates that the Hot In-Place Reclaimed(HIR) asphalt mixture produced at the field constrution site was satisfied all of the test criteria such as Indirect tensile test, Marshall and TSR test, and wheel tracking test. During the test, the research team found that current HIR system is required an extention of mixing time to improve quality and to reduce variation of sample to sample. Although the current HIR mixture was passed the test criteria, there is a potential capability to enhance the mixture properties as extend mixting time. CONCLUSIONS: Based on these laboratory test results, It would be concluded that domestic HIR mixture's properties were satisfied all standard specification related with evaluation of recycling asphalt mixtures. Based on this case study result, there is a chance to save construction cost and increase the usage of reclaimed asphalt concrete in the future.

• Journal of the Korean housing association
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• v.25 no.4
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• pp.31-38
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• 2014

The present research aimed at researching the relationships among place attachment, residential evaluations and satisfaction in a medium-sized post-communist Romanian city. Studies on post-communist cities are scarce and this research tried to fill that gap. This research is part of a government project that intended to significantly reform three medium-sized cities in the Western part of Romania and transform the urban space. Since the three of them are relatively small-sized and close spatially, the project intends to undertake massive reforms of the communications and services of the three cities. In this article, we report findings on the city of Hunedoara. A representative random sample was selected, and a total of 384 people were interviewed, with an overall reliability of the sample of 95%. The instruments used to gather the data were the Neighbourhood Perceived Environmental Quality Scale and a composite measure of place attachment was also included. The structure of each scale was checked using exploratory factor analysis. We tested alternative causal models using structural equations modelling. Our model showed a good fit to the data and explains satisfaction in the city adequately. Results show that satisfaction is directly predicted by the general evaluation of the city and by residential privacy. Residential noise and place attachment influence satisfaction indirectly. The results are discussed and some policy recommendations are formulated.

• Korean journal of food and cookery science
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• v.33 no.3
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• pp.264-274
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• 2017

Purpose: The purpose of this study was to analyze the meal types by cooking methods provided at different meal provision places using the 2015 Korea National Health and Nutrition Examination Survey. Methods: A total of 42,441 meal data on adults from the 2015 Korea National Health and Nutrition Examination Survey were used for analysis. The data were analyzed by complex sample $x^2-test$ of independence and complex sample logistic regression analysis using SPSS 23.0 for Windows. Results: The meal provision place showing the highest frequency was home (60.2%), followed by commercial (32.5%) and institutional foodservices (7.3%). The meal types by cooking method most frequently consumed were rices (18.3%) and kimchis (16.6%). The results of the complex sample logistic regression analysis showed that breads & snacks, steamed or braised dishes, fried dishes, and fresh seasoned vegetables were more likely to be consumed at commercial or institutional foodservices than at home. In addition, noodles & dumplings were more likely to be consumed at commercial places, and Korean soups were consumed at institutional foodservices. Conclusion: From the results of this study, it is suggested to develop recipes for substitution of fried dishes and to develop low sodium recipes at commercial and institutional foodservices. In addition, education of consumers of commercial foodservice is needed to reduce consumption of fried dishes, salted seafoods, and pickled vegetables and encourage consumers to choose meals from institutional foodservice managed by dietitians.

• Bulletin of the Korean Chemical Society
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• v.30 no.5
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• pp.1077-1079
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• 2009

To minimize the variance in the quantification of solid-state phases in powder samples, gently placing polycrystalline samples one next to another directly in a sample holder is better than trying to mix them homogeneously prior to transferring to a sample holder. However, the solid-state cross polarization-magic angle spinning (CP-MAS) nuclear magnetic resonance (NMR) spectroscopy results demonstrated that it is essential in this sampling method to place all the samples in the location of consistent signal sensitivity. The same sampling method may be employed in other spectroscopic quantification techniques of solid-state phases if the method to limit the sample to the location with uniform signal sensitivity in the sample holder is adapted to each technique.

• Journal of the Korean Home Economics Association
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• v.37 no.12 s.142
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• pp.125-140
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• 1999

This study aimed to examine the sexual discrimination in the labor market. For this purpose, this study compared the work conditions, perception of sexual discrimination in the work place and job satisfaction by sex, and showed some effects of the independent variables on the two dependent variables; the perception of sexual discrimination in the work place and job satisfaction. The data were from KLFI(1995)'s National data and two OLS (Ordinary Least Square) Regression models were used. The results of this study were as follows. There were significant differences in the working conditions between two sex groups. The perception of sexual discrimination in the work place was a little low and the difference by sex was not found. The variables related to the work were more important to predict the perception of sexual discrimination in the work place rather than the general characteristics of the sample. The male workers were more satisfied with their work than the female workers. The satisfaction of their work was significantly different by the variables related to the work.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.7
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• pp.275-283
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• 2021

Globalization has greatly contributed to an increased need for improvement of human capital, and particularly in the development of the real estate and construction sector. Since the political and economic reforms in 1986, Vietnam has experienced a strong economic performance. The real estate and construction sector is one of the fastest growing industries in Vietnam, accounting for approximately 7.6% of GDP in Vietnam. The aim of this study is to identify critical factors influencing the satisfaction of employees to their working place. The sample data collected was from 265 employees, managers and staff in real estate and construction companies in Vietnam. After revising the missing data, and the errors, 240 valid respondents are selected. In addition, the analysis also employs SPSS software by discussing descriptive statistics, Cronbach's alpha test, exploratory factor analysis (EFA), and regression analysis. Our empirical findings show that a company offering greater wages can positively affect the satisfaction of employees to their working place in the real estate and construction sector. In addition, a firm with a superior working relationship and working environment has a positive and statistically significant impact on the satisfaction of employees to their working place.

• Transactions on Electrical and Electronic Materials
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• v.7 no.5
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• pp.235-239
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• 2006

Charge dynamics in polymeric materials after aged under ac electric field using the pulsed electroacoustic (PEA) technique is reported. The emphasis is placed on charge decay. The charge dynamics of the ac aged additive free low density polyethylene (LDPE) samples under dc bias differ from the sample without ac ageing, indicating changes brought in by ac ageing. It is believed that a slow decay rate of charge in the ac aged sample is related to the formation of deep traps in the material. However, chemical analysis by infrared spectroscope (FTIR) and Raman microscope reveals no significant chemical changes taken place in the bulk of the material after ac ageing. Further experiments on irradiated LDPE have revealed a similar behaviour, i.e. the charge decay is slower in irradiated samples than that of fresh sample. The findings presented clearly indicate that space charge measurement can be used as a diagnostic tool to monitor ageing in polymeric materials.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• v.10 no.2
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• pp.137-145
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• 2005

The effects of air temperature and sample thickness on drying kinetics of strawberry leather were investigated. The mathematical modeling was performed by using three thin-layer dying models. The independent variables were sample thickness (S1 = 1.8, S2 = 2.7, and S3 = 3.6mm) and air temperature (50, 60, 70, and 80$^{\circ}$C). All samples took place in the falling rate period. The values of effective moisture diffusivity, D$_{eff}$ varied from 2.40 to 12.1$^{\times}$10-9m$^{2}$/s depending on drying conditions. The values of activation energy, E$_{a}$ were 35.57, 33.14, and 30.46 KJ/mol for each sample of S1, S2, and S3. The two-term exponential model was found to satisfactorily describe the thin-layer drying kinetics of strawberry leather.

• Korean Journal of Veterinary Service
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• v.36 no.4
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• pp.273-281
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• 2013

This study investigated the effects of the alkaline detergent and acid rinse used for cleaning milking machines on the eight commercially available teatcup liner materials. The sample liners prepared for use in the clean-in-place process were analyzed by ultraviolet spectrophotometer, ion chromatography and liquid chromatography. Among the eight liner materials, the ultraviolet spectra of 3 sample liners were shown to have a similar peak shape after cleaning, but the ultraviolet spectra peak shape of 5 sample liners was noticeably changed. No products were detected by ion chromatography in any of the liner materials used in this study. When the liner materials were only treated with alkaline detergent, some additional peaks were observed using liquid chromatography which indicate the creation of molecular substance and elution from liner materials, however, these peaks disappeared when the liner materials were cleaned with the acid rinse. Therefore, we propose that an acid rinse should be applied, after cleaning the milking machine with the alkaline detergent.