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Tough Hydrogel with Light-Tunable Mechanical Properties
엘레스타 프리스카 푸트리,윤진환 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Fabrication strategies for hydrogels that provide tunable mechanical properties with predetermined responses to external stimuli, especially light, are highly desirable. In this study, a photoreversible supramolecular double network hydrogel system was synthesized, which show host–guest interaction between the network to form “smart” yet strong network. A programmable modulus change could be triggered by light irradiation. The photoresponsive hydrogel exhibit reversible switching from low modulus to high modulus upon light cycles. Furthermore, remote control of such matrices can provide potential insight for programmed materials with the on-demand control of mechanical property.
Strong and Highly Stretchable Double-Network Ionogels for Electroluminescent Devices
엘레스타 프리스카 푸트리,딘 쑤안 히엡,윤진환 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
Over the past few years, interest in stretchable electroluminescent (EL) devices has increased strongly due to their potential applications in elastic and flexible lighting displays and illuminated wearable devices. Ionogels can be the favorable candidate as conducting materials for EL device based on their excellent mechanical and electrical properties. In this recent study, we utilized our previous poly(N-isopropylacrylamide-co-N,N’-diethylacrylamide) (PNN) ionogel and reinforced its structure as a double network (DN) ionogel by ionic and covalent crosslinked chitosan as its additional network. The newly developed DN ionogel can be envisaged as a resilient conductor for the stretchable alternating current electroluminescent (ACEL) device based on its impressive mechanical property and conductivity.
Optogenetic Glia Manipulation: Possibilities and Future Prospects
이성중,조우현,엘레인 한국뇌신경과학회 2016 Experimental Neurobiology Vol.25 No.5
Our brains are composed of two distinct cell types: neurons and glia. Emerging data from recent investigations show that glial cells, especially astrocytes and microglia, are able to regulate synaptic transmission and thus brain information processing. This suggests that, not only neuronal activity, but communication between neurons and glia also plays a key role in brain function. Thus, it is currently well known that the physiology and pathophysiology of brain function can only be completely understood by considering the interplay between neurons and glia. However, it has not yet been possible to dissect glial cell type-specific roles in higher brain functions in vivo. Meanwhile, the recent development of optogenetics techniques has allowed investigators to manipulate neural activity with unprecedented temporal and spatial precision. Recently, a series of studies suggested the possibility of applying this cutting-edge technique to manipulate glial cell activity. This review briefly discusses the feasibility of optogenetic glia manipulation, which may provide a technical innovation in elucidating the in vivo role of glial cells in complex higher brain functions.
장광진,서규선,변재면,박철호,전운성,엘릭,엘레오,Chang, K.J.,Seo, G.S.,Byun, Jae Myun,Park, C.H.,Jeon, U.S.,Elick, G.,Eleo, D. 국립한국농수산대학교 교육개발센터 2011 현장농업연구지 = Journal of practical agricultural resear Vol.13 No.1
Gabensis village is one of the biggest village In the Wampar Local Level Government area within the Huon Gulf District of Morobe Province with a population of around 3,000. The major staple food is banana which is well complemented by minor staples yam, cassava, Singapore/Chinese taro and sweet potato. Apart from gardening for own consumption, the villagers engage in selling of vegetables, garden staples, cocoa beans, coconuts, timber, chicken, fish and pig meat to supplement their livelihood. Livestock like pigs and chickens are also kept for meat and for commercial purpose. Bettlenut which was once one of the main cash crops has now been overtaken by cocoa due to a disease that had attacked almost the entire bettlenut tree population in the area. Even though the Wau-Bulolo highway cuts through the village and all have access to transport infrastructure, the majority of the population still encounter problems in communication due to poor telecommunication coverage. On average most people earn not more than K50 per week due to constrains in production and marketing among others. Gabensis village has the potential to develop a tourism industry given its natural attraction of Lake Wanam. Beside there is also the natural eel farming and the fish pond at the nearby Potsie village. These natural attractions pose huge tourism potential for the community. As part of government services delivery and development, education and health issues is very much important in the community however there is lack of infrastructural development and poor service delivery especially in the area of health. However, the responsibility is on the community to organize themselves to realize that potential. A well developed agro-ecotourism investments would have positive spillover effects to the community thus contributing towards improving the livelihoods of the many farming families.