• Computers and Concrete
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• 제26권2호
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• pp.175-183
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• 2020

Fly ash has become an important component of concrete as supplementary cementitious material with the development of concrete technology. To make use of fly ash efficiently, four types of fly ash with particle size distributions that are in conformity with four functions, namely, S.Tsivilis, Andersen, Normal and F distribution, respectively, were prepared. The four particle size distributions as functions of the strength and pore structure of concrete were thereafter constructed and investigated. The results showed that the compressive and flexural strength of concrete with the fly ash that conforming to S.Tsivilis, Normal, F distribution increased by 5-10 MPa and 1-2 MPa, respectively, compared to the reference sample at 28 d. The pore structure of the concrete was improved, in which the total porosity of concrete decreased by 2-5% at 28 d. With regarding to the fly ash with Andersen distribution, it was however not conducive to the strength development of concrete. Regression model based on the grey multiple linear regression theory was proved to be efficient to predict the strength of concrete, according to the characteristic parameters of particle size and pore structure of the fly ash.

• Fisheries and Aquatic Sciences
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• 제12권3호
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• pp.163-170
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• 2009

This study was conducted to obtain the gelatin fraction with a high anti oxidative activity from Alaska pollock surimi by-products using a two-step enzymatic hydrolysis and ultrafiltration. Among gelatin hydrolysates from refiner discharge of Alaska Pollock surimi, the highest antioxidative activity (81.5%) resulted from gelatin hydrolysate sequentially treated with Pronase E and Flavourzyme each for 2 hr. However, no difference was seen in the anti oxidative activity of the second hydrolysate (Pronase E-/Flavourzyme-treated hydrolysate) when compared to the permeate fractionated through a 10-kDa membrane. The results suggest that the Pronase E-/Flavourzyme-treated hydrolysate from refiner discharge gelatin of Alaska pollock surimi can be used as a supplementary raw material for improving health functionality.

• Nuclear Engineering and Technology
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• 제52권7호
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• pp.1355-1366
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• 2020

A review of the documentation and an interpretation of the NEA-1517/74 and NEA-1517/80 shielding benchmarks (measurements of photon leakage flux from a hollow sphere with a central 14 MeV neutron source) from the SINBAD database with the Monte Carlo code MCS and the most up-to-date ENDF/B-VIII.0 neutron data library are conducted. The two analyzed benchmarks describe satisfactorily the energy resolution of the photon detector and the geometry of the spherical samples with inner beam tube, tritium target and cooling water circuit, but lack information regarding the detector geometry and the distances of shields and collimators relatively to the neutron source and the detector. Calculations are therefore conducted for a sphere model only. A preliminary verification of MCS neutron-photon calculations against MCNP6.2 is first conducted, then the impact of modelling the inner beam tube, tritium target and cooling water circuit is assessed. Finally, a comparison of calculated results with the libraries ENDF/B-VII.1 and ENDF/B-VIII.0 against the measurements is conducted and shows reasonable agreement. The MCS and MCNP inputs used for the interpretation are available as supplementary material of this article.

• 한국가정과교육학회지
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• 제11권2호
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• pp.13-26
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• 1999

The goals of this research are for producing and optimizing the CD-ROM, effective and practical Teaching-Learning method. It consists of Wearing Korean Traditional Costume for the First Grade of Middle School Students in Home Economics Teaching. This research’s summarization is following. First, the multi-media material. CD-ROM making use of Powerpoint. Wearing Korean Traditional Costume, is produced to help the students learn the difficult contents in terms of video and audio. Second, it is introduced the model of Open Education for increasing the efficiency of class. Third, it is developed to proceed the class with the CD-ROM and small group study of place activity. Fourth, it helps students concentrate on the class with proper sound effect whenever the slide films are changed. And it helps to link the web sites related to Korean Traditional Costume. Finally, another kinds of suggestions are following. The effective verification of this software that is tested and applied at the field for a given period will be necessary. And, it is necessary to upgrade for the CD-ROM and the supplementary teaching materials in Korean Traditional Costume education.

• 생약학회지
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• 제33권4호통권131호
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• pp.389-394
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• 2002

Present study was carried out for development of a new supplementary product with gastroprotective effect. Natural Products mentioned that have GI protective property in Dongeuibogam and reports were evaluated anti-bacterial activity against Helicobacter pylori, then five heres were selected. The material used for the test were water extract of Alpinia oxyphlla (AO), Astragalus membranaceus (AM), Cinnamomum loureirii(CL), Citrus aurantium(CA), Amomum villosum(AV). They were tested individually on HCI ethanol-induced gastric lesion in rats, AV CL, AO showed the most significant effectiveness, respectively. Then two mixture different in their content ratio (P020701-1,-2) and complex with P020701-1 (CP) were made, and tested on HCI·ethanol, indomethacin-induced gastric lesion, aspirin-ligature, Shay ulcer and gastric secretion. P020701-1, -2 and CP showed significant effect on HCI ethanol, indomethacin-induced gastric lesion, and Shay ulcer. It can be regarded that the antigasuitic and anti-ulcerative effects of P020701- 1, -2 and CP are originated from reduction of total acid output identified by gastric secretion test.

• Food Quality and Culture
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• 제3권2호
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• pp.82-88
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• 2009

This study developed learning content and web pages providing information on Health/Functional Food (HFF) for consumers who come across information indiscriminately from a variety of advertising media such as the Internet and TV. After coming to an understanding of the current situation through literature review and fact-finding, we collected information and commercials on HFF that are exposed to consumers. Focusing on advanced countries such as the U.S. and Japan, we examined the current status of consumer education programs, especially in terms of HFF industry. Further, we referred to the guidelines for consumer education provided by the U.S. Food and Drug Administration and monitored the information from a web site that sells dietary supplementary products in the U.S. In addition, we surveyed consumer information on foods for special health use provided by the Japanese National Institute of Health & Nutrition, and investigated a DB of raw materials of function food (functionality/safety documents). Upon a literature review, the 13 functions of HFF were classified. As a result of conducting interviews with consumers, we developed content that was fit for consumers' perspectives. Through this research, we established a web page to enable people to search for information by function and then by raw material. After searching for information by raw materials, searching products by raw materials can be done in cooperation with E-marketplace. Subsequently developed content and education programs were offered on an HFF web page, which has been in operation since 2005. Therefore, it is expected that appropriate information on HFF will be available.

• 대한한의학회지
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• 제19권2호
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• pp.153-176
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• 1998

There are many differences in the present conditions of Oriental Health care and the study of Sasang Constitution Medicine between in North Korea and South Korea. 1. The government of South Korea hasn't supported Oriental Medicine with administrative plans but that of North Korea has supported it positively and made efforts to systematize it. 2. The government of North Korea has considered Oriental Medicine and Western Medicine as mutual supplementary relationship and tried to harmonize them, invested human being and material resources in developing affirmative aspects of Oriental Medicine. That efforts of them made O.M of North Korea developed. 3. In North Korea, they has studied about the principles of O.M. generally in a laboratory. 4. In North Korea, only herbs nation warrant and satisfy standards and fixed orders can be circulated. 5. Because the Sasang Constitution Medicine is opposite to aspect of Materialism, they exclude that from Korean Medicine subjects. They only use them for clinical remedy. But recently, they concern Sasang Constitution Medicine more and more. So also in South Korea, we need to strengthen the political support of the government and the research of laboratory.

• 한국자원식물학회지
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• 제33권6호
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• pp.551-557
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• 2020

In this study, we were performed to elucidate the antioxidant and anticancer activity by leaves extracts from Acer tegmentosum (AT-L). In DPPH, ABTS radical scavenging activity, the AT-L revealed the high scavenging activity. Especially, the AT-L measured the highest ABTS radical scavenging activity, which is higher than ascorbic acid. The types of human cancer cells for evaluating the anticancer activity were colorectal cancer (SW480), prostate cancer (PC-3), breast cancer (MCF-7), pancreatic cancer (AsPC-1), lung cancer (A549) and liver cancer (HepG2). Human cancer cell viability was measured using MTT assay. Treatment of the AT-L decreased the cell viability and induced apoptosis in SW480 cells. These results suggest that extracts of the AT-L can be used as supplementary material for developing the natural antioxidant and anticancer drug for human cancer cells.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2008년도 춘계 학술발표회 제20권1호
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• pp.721-724
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• 2008

플라이애시, 고로슬래그 등의 산업부산물은 현재 콘크리트 등에 활용되고 있으나, 아직까지 많은 양을 매립하거나 해양에 배출하고 있는 실정이며, 특히 1996년 런던협약에 의해 산업폐기물의 해양배출이 금지됨에 따라 이데 대한 강력한 대처가 필요하다. 따라서 본 연구에서는 $CO_2$ 배출 및 환경파괴의 원인이 되는 시멘트를 전혀 사용하지 않고 산업부산물 중 플라이애시 100% 사용한 콘크리트를 제조하기위한 기초연구로써 재령, 온도변화, 알칼리자극제를 이용하여 시멘트 제로 (zero) 콘크리트를 개발하는데 목적이 있다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제36권3호
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• pp.116-123
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• 2014

Purpose: The purpose of this study was to evaluate risks for wound dehiscence after guided bone regeneration (GBR) in dental implant surgery. Methods: Patients who received dental implant therapy with GBR procedure at Seoul National University Bundang Hospital (Seongnam, Korea) from June 2004 to May 2007 were included. The clinical outcome of interest was complications related to dental implant surgery. The factors influencing wound dehiscence, classified into patient-related factors, surgery-related factors and material-related factors, were evaluated. Results: One hundred and fifteen cases (202 implants) were included in this study. Wound dehiscence (19.1%) was considered a major complication. The risk of wound dehiscence was higher in males than in females (odds ratio=4.279, P =0.014). In the main graft, the allogenic group had the lowest risk of wound dehiscence (odds ratio=0.106, P =0.006). Though the external connection group had a higher risk of wound dehiscence than the internal connection group (odds ratio=2.381), the difference was not significant (P =0.100). Conclusion: In this study, male gender and main graft have the highest risk of wound dehiscence. To reduce wound dehiscence after GBR, instructions on postoperative care with supplementary procedure for the protection of the wound dehiscence is recommended, especially to male patients. A main graft with a gel base can reduce the risk of wound dehiscence.