• Restorative Dentistry and Endodontics
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• v.14 no.1
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• pp.7-24
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• 1989

The purpose of the study was to evaluate the cytotoxic effects of polycarboxylate cements and zinc phosphate cements in vitro. Human fibroblasts were cultured in ${\alpha}$-MEM, and each cement was manually mixed and filled in glass ring cylinder (8${\times}$8mm in diameter, in height.) Cement filled cylinders were placed in the center of the dish (35mm in diameter) containing 3ml of ${\alpha}$-MEM. Millipore filters to simulate dentinal barrier were also placed between the cylinder and the dish, then stored in 5% $CO_2$ containing chamber for 1 and 2 weeks at the temperature of $36.6^{\circ}C$. The results of the experiments were analyzed by counting the cells in the period of one week and two weeks respectively, and were assessed by calculating the cell multiplication rate and the relative growth rate. The experimental groups and the control group were compared. The results of the study were summarized as follows. 1. Durelone brand of the polycarboxylate cements showed marked cytotoxicity after one week, but after two weeks the toxicity decreased remarkably. Poly-F brand exhibited moderate cytotoxicity after one week, but after two weeks the toxicity slightly decreased. HY-BOND brand was weakly cytotoxic after one week, but after two weeks the toxicity became significant. 2. The cytotoxicity of the zinc phosphate cements was negligible after one week, but after two weeks Lee Smith brand revealed considerable cytotoxicity. 3. In general, the zinc phosphate cements were less cytotoxic than the polycarboxylate cements.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.46 no.2
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• pp.167-177
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• 2020

In this study, we analyzed the growth factors and industrial role of cosmetics OEM·ODM enterprises that have played an important role in Korea's growth as the fourth-largest cosmetics exporter in the world. Since the OEM industry was first introduced to Korea by Kolmar Korea in 1990, the industry has grown to account for 12.619 trillion won as of 2016 and 69.9% of sales of local products. Also, the industry not only supported brand enterprises to enter the global market but also directly supplied products to global enterprises, contributing to economic growth and rising national prestige. Growth factors in Korea's cosmetics OEM·ODM industry can be found in the development of differentiated business models, such as continuous technology development, active response to the industrial environment, and settling a system with technology and creative ideas. For sustained growth and development of Korean cosmetics industry, OEM·ODM needs to be settled as Korea's own industry and co-exist with brand enterprises in complementary relations.

• Journal of the Korean association of regional geographers
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• v.21 no.2
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• pp.273-285
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• 2015

The objective of this paper is to analyze the impact of formation and change in city brand and image of Suncheon city due to be held the International Garden Exposition Suncheon Bay Korea 2013 from April to October 2013. In order to research purpose, this study adopted a telephone interviews survey method for the entire national peoples. 65.3% of all respondents positively evaluated about city brand of Suncheon city. particularly development potential among five indexes of city brand. All of respondents also positively evaluated about settlement possibility of Suncheon city, and were recognized as eco & garden city for city image of Suncheon city. In addition, all of respondents evaluated the Suncheon Bay Ecological Park as a representative attractions of Suncheon city.

• CELLMED
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• v.13 no.2
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• pp.2.1-2.9
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• 2023

CPS219, a new concept compound composed of coffee (CO), Pueraria Tomsonii flower (PF), and Sambou bamboo salt^TM (BS), was developed as a coffee beverage to alleviate menopausal symptoms. The purpose of this study is to evaluate the anti-oxidant and menopausal alleviating effects of CPS219 combined as the optimal ratio of each component selected through sensory evaluation and blind consumer test. For CPS219, the optimal ratio of CO, PF, and BS was determined to be 1:0.1:0.017 through various sensory evaluations and blind consumer tests. CPS219 significantly enhanced the superoxide dismutase-like activity compared to the CO or CO plus PF (CP). The proliferation of MCF-7 cells was considerably increased after 24 hours by treatment with CO, CP, or CPS219, but only CPS219 significantly boosted the proliferation of MCF-7 cells after 48 hours. Moreover, CPS219 had an estrogen-like effect by dramatically increasing the expression of estrogen receptor-β mRNA in MCF-7 cells but not CO and CP. Treatment of MCF-7 cells with CO, CP, or CPS219 did not cause any cytotoxicity. In conclusion, these findings imply that anti-oxidant and estrogen-like properties of CPS219 can be used to prevent and cure postmenopausal symptoms.

• Asia pacific journal of information systems
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• v.32 no.1
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• pp.1-31
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• 2022

Personalization and customization of product and service designs involving firms and customers using online design interfaces across the Internet is increasingly being facilitated by brands. Research on the role of information technology and value co-creation across various research disciplines in management has provided learnings on ways to creatively improve products and services by integrating customers and firms in web portals. This paper provides a comprehensive analysis of the specific attributes of value co-creation between customers and firms relevant to business logic, learnings, projects, personalized products and services, social network innovations, brand management and markets across the Internet for the purpose of enhancing information management of value co-creation for industries and research. The paper draws on published research and industry surveys on how value co-creation is growing in the digital economy. An industry survey of managers who use web portals for their business responded to a questionnaire on how various social, economic and intellectual motivation factors of firm-customer interactions result in value co-creation for customers and firms. These motivation factors can lead to improved learning systems for business process improvements and service management for industries, customers and firms and may also be classified.

• The Journal of the Korea Contents Association
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• v.22 no.1
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• pp.197-213
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• 2022

In this study, text mining analysis was performed on online big data for recognition and assessment of urban brand I Seoul U. To this end, TEXTOM, a processing program for data acquisition and analysis was used, and the 'I SEOUL U' keyword was selected as an analysis keyword. Keyword analysis shows the keywords associated with I Seoul U to be as follows: First, as a business and marketing term, keywords include pop-up store, gallery, co-branding, (festival, etc.), commodities, private companies and online. Second, as an event-related term, keywords include Han River, tree-planting day, tree planting, Hongdae, Christmas, Mapo, Jung-gu, Sejong University, and festival. Third, as a promotional term, keywords include robotics engineer Dr. Dennis Hong, Government, Art and Korea. In the N Gram analysis, as the city brand of Seoul, I Seoul U, in the public interest, was found to contribute to the commercial activities of private companies. In connection-oriented analysis, business and marketing, events, and promotions have been derived as categories. In matrix analysis, it was found that the products of the pop-up store are mainly developed, and products in the form of co-branding were being developed. In the topic modeling, a total of 10 topics were extracted and needs for commercial utilization and information for event festivals were mostly found.

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2003.10a
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• pp.109-110
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• 2003

• Proceedings of the Korean Society of Toxicology Conference
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• 2003.10b
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• pp.109-110
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• 2003

To validate a novel mouse model, gpt delta, for in vivo mutagenesis, the Mammalian Mutagenesis Society (MMS), a subgroup of the Environmental Mutagen Society of Japan (JEMS) (JEMS/MMS), performed a collaborative study as the third trial for transgenic animal assay. In this mouse model, point mutations and deletions re separately identified by gpt (6-thioguanine-resistant) and Spi- (sensitive to P2 interference) selections, respectively.(omitted)

• Proceedings of the Korean Geotechical Society Conference
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• 2008.03a
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• pp.905-913
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• 2008

The water resource depending on mostly surface water has many problems, such as contaminated and unpredicted contamination event. For this reason, it has been employed highly technical treatment method for them, such as ground water dam and river bank filtration. it has been developed the radial collector wells in kind of bank filtration to increase efficiency for in-taking the water resource insead of the vertical well needed many wells to take more resource. But it has many problems with the incumbent method to bore the horizontal hole for radial collector wells, such as filling with the filter material outside of a strainer by watering, jamming as retrieving the casing tube with the filter material, eccentric boring etc. To reduce the problems of incumbent equipment, it has been developed the horizontal boring equipment and performed the field trial tests several times, which have bits and water jetting system with rotating the cone-shaped front to be excavated easily. In this paper, it was compared the brand-new with the incumbent non-rotating pressing insertion method. Also it was shown the problems of the incumbent method was reduced effectively.

• Journal of Families and Better Life
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• v.26 no.2
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• pp.143-154
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• 2008

This study intended to provide information which gives a way for students and their parents to be satisfied with student costume purchase by showing differences between their satisfactions and repurchasing intention according to school uniform purchase type. Total 280 questionnaires were distributed to the first year students at a private middle school in Seoul and 133 of copurchase cases and 120 individual purchase cases were collected and analyzed. The comparing results between parent satisfaction and repurchasing intention were summarized as follows. First, parent satisfaction of individual purchase and of co-purchase had been evaluated. As a result of the analysis of satisfaction by the five factors, individual parent buyers had higher satisfaction in brand, quality, design, and service except price. The largest different factor between both customers was quality satisfaction. Secondly, the individual buyers showed higher repurchasing intention than co-purchasing buyers. This result meant that individual purchasing group showed higher satisfaction. Lastly, when the relationship between satisfaction and repurchasing intention of each buyer group was examined, the level of satisfaction was positively associated with the repurchase intention of co-purchase.