• Proceedings of the SCSK Conference
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• 2003.09a
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• pp.660-671
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• 2003

A chemical investigation of Peucedanum praeruptorum has resulted in the isolation of 3 khellactone derivatives, which have inhibitory effects on melanogenesis in B16 mouse melanoma cell lines. The khellactone derivatives were isolated from the crude extract of the roots of Pecedanum praeruptorum by a combination of adsorption chromatography and HPLC. The structures of isolated compounds were identified as 3', 4'-diangeloyl-cis-khellactone, 3'-angeloyl-4'-senecioyl-cis-khellactone and, 3', 4'-disenecioyl-cis-khellactone by $^1$H NMR, $^{13}$ C NMR and mass spectral studies and by comparisons of spectral data with reported literatures. These khellactone derivatives can be a good candidate for new skin whitening agent due to its strong inhibitory activity and safety.

• Journal of Information Technology Services
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• v.12 no.2
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• pp.73-84
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• 2013

The development of the information on the internet brought a lot of changes in the real estate market. Because the real estate has local distinctiveness and individuality household who want to move must to visit place for housing information. But now household use internet real estate information at every decision-moving step and that is able to reduce not only the cost of real estate information but also social benefit like $CO_2$ emissions reduction effect. In this study, I analyzed the effect of $CO_2$ emissions reduction with Seoul household residential mobility data when household take informations from internet real estate site. As increasing a single family who is good at internet service, the effect of $CO_2$ reduction from the development of the Internet real estate information has more increased.

• Applied Chemistry for Engineering
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• v.8 no.2
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• pp.315-319
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• 1997

In this study, the optimum analytical conditions for determination of distribution of propylene oxide in a nonionic surfactant and separation of fatty alcohols were investigated by Reversed Phase High Performance Liquid Chromatography. To analyse the distribution of propylene oxide (PO) and carbon chain length of a fatty alcohol, we derivatized samples for the purpose of using a UV detector. Also, we studied the influences of columns and mobile phase composition to obtain the optimum separation conditions. In our experiment, Waters Symmetry $C_8(3.9{\times}150mm)$ column was used. And the optimum condition were obtained by gradient elution with methanol and water as the mobile phase. In the plot of log k' vs composition of water in the binary phase, the linerality was very good. We ploted the calibration curve to conform the quality of fatty alcohol, a good linerality was obtained.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.31 no.6 s.261
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• pp.574-580
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• 2007

The objective of this article is to present an analysis of all heat transfer paths through the energy nose under closed door conditions when refrigeration system of household refrigerator-freezer is operating on. Both experimental and numerical methods are suggested as a means of determining the overall energy nose load amount as well as the load due to each pathway such as mullion section and F and R sides of the household refrigerator-freezer. In other words, all loads determined in this article are just energy nose and not the loads seen by the refrigeration system. We suggest good ideas for improving the heat transfer losses such as conduction and convection through the energy nose. As we can be known from the experimental test results, it is effective to prevent the heat loss of a mullion section. And energy efficiency is also decreased approximately 6% compared to that of a baseline sample test result. As we can be known from the Ansys 8.1 analysis, it is shown the steady state temperature distribution in figures from 6 to 8. And the direction of the heat flow through the energy nose section is also easily seen from that In conclusion, the article is focused on an energy nose section in household refrigerator-freezer for practical proposes which is the energy saving in a household refrigerator-freezer. And the method suggested may be applied to any make or model to aid in the search for high efficient energy nose section of household side by side refrigerator-freezer as well as top mounted refrigerator-freezer, commercial refrigerator and so on.

• The Korea Journal of Herbology
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• v.24 no.4
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• pp.101-106
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• 2009

Objectives : We investigated the anti-aging effects on skin with 9 Repetitive steaming and fermenting herbal composition extract (FHE). Methods : Herbal composition is comprised of Panax Ginseng, Rehmannia glutinosa, Polygonum multiflorum and Polygonatum Sibiricum. They steamed and fermented with Saccharomyces cerevisiae and Lactobacillus brevis by turns at 9 times. We measured various effects related to skin aging such as scavenging activity against free radical, cell proliferation, collagen synthesis and toxicity of 9 repetitive steaming and fermenting herbal composition extract were evaluated and compared with herbal composition extract (HE). Results : As the number of steaming and fermenting cycle increased free-radical scavenging activity were increased. But cell proliferating ratio was not increased when the number of steaming and fermenting cycle. The FHE could significantly increase the collagen synthetic ratio compared with HE treated group. And, FHE was showed no toxicity at all tested concentrations. Conclusions : The results of our study propose that FHE has good anti-aging effects on skin.

• Journal of the Korean Home Economics Association
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• v.40 no.8
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• pp.153-166
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• 2002

This study aims to reveal the influence of price increase in gasoline on household expenditure trade-off. The subjects were 651 households, acquired the first quarter of 1996 and 1997. This study shows the change of the auto fuel budget share in the same household and they were analyzed with the paired t-test, independent t-test. The results are as follows; 1) the price increase of auto gasoline resulted in the increase of its budget share, regardless of a household's true increase or decrease of income. 2) according to price increase in gasoline, the auto fuel budget share has been changed, therefore I divided these changes into three group on the base of it's degree of change. 3) In the group that had a decrease in auto fuel budget share compared to the degree of change, there was a trade-off between the increase in food and light & light water and the decrease of education and auto fuel budget share. Auto fuel in this group was used as discretionary good. 4) In the group that had a similar change in auto fuel budget share compared to the degree of change, there were no trade-off between expenditure items except auto fuel budget share and miscellaneous decrease. This group is the highest income group among the three groups. 5) In the group that had and increase of change in auto fuel budget share compared to the degree of change, there was a trade-off between the increase of eating-out and auto fuel, and the decrease of education and miscellaneous budget share. Auto fuel in this group was used as a discretionary good. 6) trade-off expenditure budget share showed a mixed effect between the influence of increase in gasoline price and influence of increase in true income.

• Natural Product Sciences
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• v.7 no.2
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• pp.45-48
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• 2001

The antioxidative effect of the extracts from the leaves and fruits of Acer ginnala against free radicals was studied by two different methods using DPPH radical-generating system, and hydroxyl radical-generating system $(Cu^{++}/H_2O_2\;system)$ which induces DNA strand breaking. Compared with well known antioxidative plants, green tea, Scutellaria baicalensis, the Acer ginnala extracts showed excellent radical-scavenging activity in DPPH radical-generating system and inhibited effectively hydroxyl radical induced-DNA strand breaking in a concentration-dependent manner in $Cu^{++}/H_2O_2$ system whereas the green tea extract stimulated the strand breaking at a low concentration. These results suggest that he extracts from the leaves and fruits of Acer ginnula could be good antioxidative agents.

• Nutrition Research and Practice
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• v.2 no.2
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• pp.93-99
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• 2008

A community-based longitudinal study was conducted in the Manya Krobo District of the Eastern Region of Ghana with the objective of assessing how caregiving practices influence nutritional status of young children in Ghana. The study subjects were one hundred mothers with infants between the ages of 6 and 12 months. Each child was visited at home monthly for a period of six months. On each visit, information was collected on caregiver household and personal hygiene, child's immunization status, child's dietary diversity, caregiver responsiveness during feeding, caregiver hygienic practices related to feeding and child's weight and length. At the end of the study, summary scores were generated for each variable and quality of care practice determined based on their distribution. Classification of child nutritional status was based on z-scores for both weight-for-age and length-for-age. The results revealed that caregivers who exhibited better quality of care practice had well-nourished children. Such caregivers were more likely to practice good household and personal hygiene than those of poorly nourished children (97.1% vs 31.8%, p<0.001). They were also more likely to complete their children's immunization schedules (88.2% vs 62.2%, p<0.001), provide good quality diets from highly diversified sources (79% vs 23%, p<0.001), exhibit high responsiveness during feeding (100% vs 22.7%, p<0.001) and feed under hygienic conditions (100% vs 22.7%, p<0.001). Based on the findings it was concluded that good caregiving practices are associated with improved child nutritional status.

• Journal of Family Resource Management and Policy Review
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• v.4 no.2
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• pp.1-15
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• 2000

The purpose of this study is to suggest the way to improve the life satisfaction of the aged in the institutional household by examing some of factors such as individual, social support and facility that influence their life satisfaction. In the view of statistical results, the level of their life satisfaction is influenced by individual, social support and facility related to factors. First, the level of the aged’s life satisfaction is high when the person has spouse who lives together, has many children, presumes oneself as in healthy and has high-satisfaction of religion. Second, the level of the aged’s life satisfaction is high when the person has good relationship with friends in institutional household and one’s children. And the person whose relative call her or him frequently and she or he is proud of one’s being in institutional household has high-satisfaction of one’s life. Third, the level of the aged’s life satisfaction is high when the person satisfies the quality of food-services and housing services. Finally, the results of in-depth interview show that the person who has financial power, a certain of hobby and one’s role has high-satisfaction of one’s life

• Journal of Families and Better Life
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• v.29 no.6
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• pp.105-121
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• 2011

The purpose of this study was to propose ubiquitous housing environment based on older residents' needs for ubiquitous(UT) home services. For this purpose, at the previous study which was the first stage of this study, UT home services by each elderly household based on spouse, income level, and health status were identified and this study finally proposed UT home services by each elderly household type according to residents' level of needs for UT home services. One to one interview with a structured survey questionnaire and illustration was implemented and 204 older residents who were composed of one of six elderly household types were responded. Among 6 types of elderly households, type 2 and 6 were the groups which had higher needs for various kinds of UT home services. Economic status and their health status were the key factors to determine their needs for UT home services. Type 4 and 7 were the groups to express their lower needs for UT home services due to their lower income level and good health condition. Ultimately, two floor plans for type 4 and 5 elderly households were developed to show applicable UT home services in each room of the house.