• Applied Science and Convergence Technology
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• 제24권4호
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• pp.96-101
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• 2015

Quantitative evaluation of photocatalytic activity of oxide nanoparticles in aqueous solution is quite challenging in that the kinetic reaction rate is determined by a complicated interplay among various limiting factors such as light scattering and absorption, diffusion and adsorption of reactants in condensed liquid phase, photoexcited charge separation and recombination rate, and the exact nature of active sites determined by detailed morphology and crystallinity of nanocrystals. Here, we present our simple experimental results showing that the kinetic regime of a typical photocatalytic degradation experiment over UV-irradiated $TiO_2$ nanoparticles in aqueous solution is in that dominated by the photoactivity of $TiO_2$ and its concentration. This result lays a firm ground of using the measured kinetic reaction rate in evaluating photocatalytic efficiency of oxide nanocrystals under evaluation.

• 대한물리치료과학회지
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• 제5권4호
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• pp.845-850
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• 1998

The purpose of those study is to estimate grip and hand activity of RA patients and find that the evaluation is very a valuable to the RA patients. The term of the evaluation was from June 25. 1998.. to July 30. 1998 and researched at Hanyang university Rheumatic Hospital. This study researched 100 normal people and 85 RA patients and analyzed the results and averaged those with t-test by Excel data. The results of those study are as follows. 1. The highest percent of those results of the dynamometer, pinch research was the people who are on 40s. 2. The results of all RA patients marked lower than those of normal people. 3. It's difficult to do hard work such as washing, opening can, transferring boxes to the patients. 4. The above research is effective to RA patients.

• 컴퓨터교육학회논문지
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• 제14권1호
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• pp.55-67
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• 2011

최근 온라인에서 발생하고 있는 다양한 문제들로 인하여 정보보호 교육의 필요성이 증가하고 있다. 2007년 중등학교 정보 교육과정을 개편하여 정보보호 교육을 강화하였으나, 교육현장에서 활용할 수 있는 구체적인 학습 자료가 부족한 실정이다. 이에 본 연구에서는 초 중등학교에서 적용할 수 있는 정보보호 교육을 위한 언플러그드 활동을 개발하였다. 본 연구에서 개발한 언플러그드 활동은 Lickona의 통합적 도덕성 모형과 언플러그드 활동 디자인 패턴을 적용하여 설계하였으며, 전문가 검토 및 초등학생 대상의 파일럿 테스트를 거쳐 개발하였다. 개발한 활동은 중학생 21명을 대상으로 적용하고 유용성을 평가하였다. 평가 결과, 첫째, 개발한 언플러그드 활동은 기존에 개발된 언플러그드 활동과 유사한 기대감을 나타내었다. 둘째, 지속성 부분에서도 기존에 개발된 언플러그드 활동에 비해 높거나 유사함을 나타내어, 본 연구에서 개발한 언플러그드 활동의 유용성을 확보할 수 있었다. 본 연구에서 개발한 언플러그드 활동은 정보보호 교육을 위한 다양한 학습 콘텐츠 제작에 시사점을 제공할 것이다.

• 한국초등과학교육학회지:초등과학교육
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• 제26권1호
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• pp.12-23
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• 2007

The purpose of this study was to research the effects of students' evaluation results on teachers' teaching activities. The subjects were 431 elementary school students of 4th, 5th and 6th grade, and 14 teachers of 7 schools located in Seoul, Cheongju, and Daejeon city. The experimental design included pre and post-tests with the control group. Our results found that most of the students had positive thoughts towards science classes. In particular, activities where the teachers provided support in the conduct of experiments and the learning atmosphere generally were evaluated higher than other activities. However, unrestricted experiments were evaluated lower by the students. The feedback from the students' evaluation results of their teachers affected the teachers' teaching activities statistically. The teachers' support during experiments, unrestricted activity during experiments, and evaluation activities were changed positively following the students' feedback. However, the loaming atmosphere and unrestricted activity during experiments were observed to change negatively when the teachers were not given the students' feedback.

• Archives of Pharmacal Research
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• 제2권2호
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• pp.127-131
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• 1979

The extracts of sixty Korean plants were evaluated for their biological activities such as antitumor activities against Sarcoma 180, Leukemia SN-36 and Ehrlich ascites carcinoma, antimicrobial activities and behavioral observation in mice. The results are tabulate.

• Journal of Microbiology and Biotechnology
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• 제31권12호
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• pp.1667-1671
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• 2021

A new homocysteine thiolactone derivative, thiolactomide (1), was isolated along with a known compound, N-acetyl homocysteine thiolactone (2), from a culture extract of soil-derived Streptomyces sp. RK88-1441. The structures of these compounds were elucidated by detailed NMR and MS spectroscopic analyses with literature study. In addition, biological evaluation studies revealed that compounds 1 and 2 both exert neuroprotective activity against 6-hydroxydopamine (6-OHDA)-mediated neurotoxicity by blocking the generation of hydrogen peroxide in neuroblastoma SH-SY5Y cells.

• 유통과학연구
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• 제14권8호
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• pp.45-50
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• 2016

Purpose - This study aimed to develop a new practical and universally applicable service quality model by improving the service quality measurement model proposed by many previous studies. Research design, data, and methodology - An in-depth analysis on what influences such service quality model had on the improvement effect of service quality, and Service Evaluation Model("SEM"), which was revised from the existing service quality measurement model, was developed. The model is divided into the two integrative categories: First, activity, that is the group of service-related activities. Next is item, the group of service-related objects. The level of service is evaluated for each category via survey questionnaire on service level evaluation. Based on the model, SEM has visibility by structuring the whole service industry. Results - For the application of the new service quality model, this study attempted to examine the appropriateness of the newly proposed service quality model by applying it to retail service field. Conclusions - As a result, the proposed service model would be a useful and applicable service quality measurement model required by many organizations. Service company can set up self check service levels. Through these results, they can look for the ways to provide better services to customers. Service users can ensure the objectivity of business plan based upon SEM.

• 한국식품영양학회지
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• 제27권5호
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• pp.962-970
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• 2014

This study was performed to compare the physiological effects of puffed snack on diabetic and geriatric diseases using miscellaneous cereals and grain crops. The puffed snacks were prepared with different amounts of miscellaneous cereals and grain crops (in ratios of 10%, 20%, and 30% of brown rice). Changes in the water soluble index, water absorption index, color, antioxidant activity, total polyphenol content acidity, ${\alpha}$-glucosidase inhibition activity, and sensory evaluation were also determined. As the cereal and crop contents increased, the value of the water soluble index increased while the water absorption index decreased, with the exception of glutinous foxtail and barnyard millets. With respect to color, lightness and yellowness decreased in concert with increases in the cereal and crop contents, whereas redness increased. Furthermore, the antioxidant activity and total polyphenol content as well as ${\alpha}$-glucosidase inhibition activity increased remarkably with increasing concentrations of sorghum. There was no significant difference in the physiological activities depending on the addition of millet, barley and barnyard millets. In sensory evaluation, the puffed snacks containing sorghum, millet, and glutinous foxtail millet received higher values than other samples. Altogether, our results indicate that puffed snacks containing 10~20% sorghum could be suitable as ingredients for improving sensory and physiological activities in diabetic and geriatric diseases.

• Archives of Pharmacal Research
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• 제22권6호
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• pp.559-564
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• 1999

In order to discover new cancer chemopreventive agents from natural or synthetic products, a structurally diverse class of chemopreventive agents was evaluated using in vitro biomarker of inhibition of 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced ornithine decarboxylase (ODC) activity in cultured mouse epidermal 308 (ME)308 cells. As a results, apigenin, benzylisothiocyanate, curcumin, diallyl disulfide, N-(4-hydroxyphenyl)retinamide (4-HPR), menadione, miconazole, nordihydroguaiaretic acid (NDGA) and phenethyl isothiocyanate showed potent inhibitory effects in this process. A chemically diverse group of compounds was included in the evaluation, such as flavonoids, retinoids, isothiocyanates, sulfur-containing compounds and phenolic antioxidant compounds. These data are suggestive to understand the cancer chemopreventive potential mediated by these substances.

• 생약학회지
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• 제43권4호
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• pp.345-351
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• 2012

In this study, 49 Korean herbal medicines have been investigated with an in vitro evaluation system using glycation end products (AGEs) formation inhibitory activity. Of these, 18 herbal medicines ($IC_{50}$ < $50{\mu}g/ml$) were found to have significant AGEs formation inhibitory activity. Of these, five herbal medicines ($IC_{50}$ < $50{\mu}g/ml$) were found to have significant AGEs formation inhibitory activity. Particularly, Mallotus japonicus (twigs and leaves), Rhus javanica (twigs and leaves), Boehmeria nivea (whole plants), Quercus acuta (stems), and Eurya japonica (stems) showed more potent inhibitory activity (approximately 9-37 fold) than the positive control aminoguanidine ($IC_{50}=76.47{\mu}g/ml$).