• Journal of Industrial and Engineering Chemistry
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• 제67권
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• pp.164-174
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• 2018

The purpose of this work designed hybrid-structured and plasma effect photocatalyst of $Ag/In_2O_3/TiO_2/HNTs$ via sol-gel and photo-reduction methods. The structures, morphologies, optical and photoelectric performances of as-prepared photocatalysts were characterized via XRD, TEM, XPS, BET, UV-vis DRS, PL and photocurrents. The photocatalytic activity was evaluated by degradation of TC. The results showed that the hybrid-structure and plasma effect can effectively cause the multi-transfer of electrons and increase the separation rate of electron and hole pairs which obtained high photocatalytic activity. The photocatalytic degradation processes reveal that $^{\bullet}O_2{^-}$ and $h^+$ are major active species.

• 한국가구학회지
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• 제25권2호
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• pp.148-153
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• 2014

Importance of energy consumptions has being emphasized because of problems of the energy and environment. So, recently, green wall systems have been installed to reduce building energy consumptions. The green wall systems provide several benefits; they make it possible to maintain moderate thermal comforts by greenery. Greening such a surface wall in the building by plants, the temperature of the wall can be properly controlled that purifies the air and improves the view spanning over the space. This study evaluated the effects of green wall systems on reducing room temperature quantitatively, changing of humidity, decreasing of $CO_2$. Test results were confirmed; first, the space installed by green walls showed that temperature and $CO_2$ decreased and humidity was increased. Second, two structures were compared with the solar radiation, and green wall systems controlled the temperature and humidity stably near the wall regardless of the amount solar radiation. In conclusion, the green wall systems can contribute to thermal comforts and indoor air quality in the buildings.

• 한국가정과교육학회지
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• 제27권3호
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• pp.63-77
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• 2015

인성과 환경을 강조한 녹색식생활 교육이 중학교에서 실시되고 있다. 본 연구에서는 중학생의 자아존중감과 행복감이 녹색식생활 실천에 미치는 영향과 현재 중학교에서 실시되고 있는 녹색식생활 단원 교육 효과를 살펴보고, 효과적인 녹색식생활 교육 프로그램 개발을 위하여 실시되었다. 대구시 소재 중학교 2학년 242명을 대상으로 2014년 3월과 6월에 각각 실시되었다. 녹색식생활 실천과 효능감은 성별과 학년, 가정의 경제적 수준, 한 달 용돈에 따라 유의적인 차이가 있었다(p<0.5). 자아존중감의 가족관계, 또래관계, 자기역량 요인(p<0.05)과 행복감의 긍정적, 부정적 요인이 녹색식생활 실천에 유의적인 영향을 미쳤고(p<0.001), 녹색식생활 실천 효능감은 자아존중감의 가족관계, 또래관계, 자기역량 요인(p<0.05), 행복감의 긍정적, 부정적 정서, 부정적 인관관계에 유의적인 영향을 받았다(p<0.001). 녹색식생활 교육 후 녹색식생활에 대한 흥미와 실천도는 유의적으로 증가하였지만(p<0.05) 청소년의 자아존중감 요인들(가족관계, 불만족, 또래관계, 자기역량)과 행복감 요인들(긍정적, 부정적 정서, 부정적 인간관계)에는 유의적인 변화가 나타나지 않았다. 따라서 중학생의 녹색식생활 교육이 성별, 학교성적, 경제적 수준, 한 달 용돈 등을 고려하는 동시에 자아존중감과 행복감을 높일 수 있는 전략을 세워 실시된다면 인성과 녹색식생활 교육의 효과를 더욱 높일 수 있을 것이다.

• Bulletin of the Korean Chemical Society
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• 제33권12호
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• pp.4251-4254
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• 2012

• Asian Journal of Atmospheric Environment
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• 제6권2호
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• pp.127-135
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• 2012

Urbanization has led to a reduction in green spaces and thus transformed the spatial pattern of urban land use. An increase in air temperature directly affects forest vegetation, phenology, and biodiversity in urban areas. In this paper, we analyze the changing land use patterns and urban heat distribution (UHD) in Seoul on the basis of a spatial assessment. It is necessary to monitor and assess the functions of green spaces in order to understand the changes in the green space. In addition, we estimated the influence of green space on urban temperature using Landsat 7 Enhanced Thematic Mapper Plus (ETM+) imagery and climatic data. Results of the assessment showed that UHD differences cause differences in temperature variation and the spatial extent of temperature reducing effects due to urban green space. The ratio of urban heat area to green space cooling area increases rapidly with increasing distance from a green space boundary. This shows that urban green space plays an important role for mitigating urban heating in central areas. This study demonstrated the importance of green space by characterizing the spatiotemporal variations in temperature associated with urban green spaces.

• Integrative Medicine Research
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• 제3권1호
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• pp.4-10
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• 2014

Green tea and coffee consumption have been widely popular worldwide. These beverages contain caffeine to activate the central nervous system by adenosine receptor blockade, and due to the caffeine, addiction or tolerance may occur. In addition to this caffeine effect, green tea and coffee consumption have always been at the center of discussions about human health, disease, and longevity. In particular, green tea catechins are involved in many biological activities such as antioxidation and modulation of various cellular lipid and proteins. Thus, they are beneficial against degenerative diseases, including obesity, cancer, cardiovascular diseases, and various inflammatory diseases. Some reports also suggest that daily consumption of tea catechins may help in controlling type 2 diabetes. However, other studies have reported that chronic consumption of green tea may result in hepatic failure, neuronal damage, and exacerbation of diabetes, suggesting that interindividual variations in the green tea effect are large. This review will focus on the effect of green tea catechins extracted from the Camellia sinensis plant on type 2 diabetes and obesity, and the possible mechanistic explanation for the experimental results mainly from our laboratory. It is hoped that green tea can be consumed in a suitable manner as a supplement to prevent the development of type 2 diabetes and obesity.

• 한국가시화정보학회지
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• 제19권2호
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• pp.41-47
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• 2021

River and stream are the important water supply source in our lives. Eutrophication causes excessive green algae growth including microcystis, which makes harmful to ecosystem and human health. Therefore, the water purification process to remove green algae is essential. In Korea, green algae alarm system exists depending on the concentration of green algae cells in river or stream. To maintain the growth amount under control, green algae monitoring system is being used. However, the unmanned, small and automatic monitoring system would be preferable. In this study, we developed the 3D printed device to measure the concentration of green algae cell using microfluidic droplet generator and deep learning. Deep learning network was trained by using transfer learning through pre-trained deep learning network. This newly developed microfluidic cell counter has sufficient accuracy to be possibly applicable to green algae alarm system.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2019년도 추계학술대회
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• pp.63-63
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• 2019

The thinning Green ball apple was extracted using water and ethanol and a phenolic concentration of thinning Green ball apple was $50-200{\mu}g/mL$. The water and ethanol extracts of thinning Green ball apple showed 94.69% and 92.24% 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity and 100.30% and 99.16% 2,2'-Azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging activity at phenolic concentration of $200{\mu}g/mL$, respectively. The water and ethanol extracts of thinning Green ball apple showed antioxidant protection factor of 1.76 antioxidant protection factor and 1.76 antioxidant protection factor, respectively. The water and ethanol extracts showed 101.46% and 99.64% anti-oxidative effect on thiobarbituric acid reactive substances at phenolic concentration of $200{\mu}g/mL$. Hence, the water and ethanol extracts of thinning Green ball apple can be considered a potential anti-oxidant. The water and ethanol extracts showed 33.28% and 32.14% hyaluronidase inhibition, respectively, at phenolic concentration of $150{\mu}g/mL$. The water and ethanol extracts showed 47.33% and 40.92% elastase inhibition and 46.19% and 65.58% collagenase inhibition at phenolic concentration of $200{\mu}g/mL$, respectively. About these experiments, thinning Green ball apple was found to exhibit anti-oxidation activity as well as hyaluronidase, elastase and collagenase inhibitory activities. Therefore, thinning Green ball apple can be considered a potential source for functional food.

• 한국자기공명학회논문지
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• 제21권4호
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• pp.119-125
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• 2017

The plucking season of green tea leaves is one of the important parameters that decide their metabolic diversity, quality, and prices. The effects of plucking sghlwleasons on green tea metabolites were investigated through metabolite profiling by $^1H$ NMR spectroscopy. The orthogonal projection on latent structure-discriminant analysis (OPLS-DA) showed clear discriminations of green teas by three different grades depending on plucking seasons: Ujeon, Sejak, and Jungjak. These results suggested that the nine peak groups could be used for diagnostics for identification of high quality Ujeon grade of green tea.

• 농촌계획
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• 제19권4호
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• pp.293-306
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• 2013

According to the increase of rural experience, that is important in satisfying needs of green tourism and vitalizing rural economy to use closed school in rural area as experience facility. For using closed school as experience facility, political and institutional assistants are needed in effective equipments and stable operation based on multi-perspective approach and analysis. In this study, we try to evaluate green-tourism accessibility of rural experience facility remodeled from closed school considering regional population and spatial characteristics. In evaluating process, gravity potential model are adapted with considering group size of customer and distance-friction coefficient. Distance-friction coefficient is a function of user restriction which depend on possible activity in each experience facility. Green tourism accessibility of experience facility is calculated with summation of accessibility to each region, and we analyzed it as a group by closed school type and location with application in Chungcheongnam-do. We found a correlation between green tourism accessibility of rural closed school and their income.