The bioeffects of silica nanoparticles (SiNP), phosphorylate-terminated nanoparticles (PO4- NP) and amino-terminated nanoparticles (NH2NP) on HaCaT cell line have been studied in this paper. The effects of the three k...The bioeffects of silica nanoparticles (SiNP), phosphorylate-terminated nanoparticles (PO4- NP) and amino-terminated nanoparticles (NH2NP) on HaCaT cell line have been studied in this paper. The effects of the three kinds of functionalized silica nanoparticles on adherence, proliferation and cycle of HaCaT cells have been investigated. And the cel- lular uptake of the three kinds of functionalized silica nanoparticles by HaCaT cells has also been exam- ined. Results indicated that the bioeffects of the three kinds of functionalized nanoparticles on HaCaT cells were concentration-dependent. And the three kinds of functionalized nanoparticles all exhibited well bio- compatibility if the concentration was below 0.2 μg/μL. While the cytotoxicities of the three kinds of function- alized nanoparticles on HaCaT cells would increase with the increasing of nanoparticles concentration, and the following order was observed: NH2NP > SiNP > PO4NP. In addition, the quantity and rapidity of cellular uptake of nanoparticles by HaCaT cells were diverse due to the different functional groups. Under the same conditions, NH2NP was most and fast internalized by HaCaT cells, followed by SiNP, and PO4NP was the least and slowest. These results provided theoretical foundation for the safe applica- tion and further modification of silica nanoparticles, which could broaden the application of silica nano- particles in biomedicine.展开更多
In this study,we report on the realization of ultraviolet response enhancement in PV cells through the structure of ITO/SiO2/np-Silicon frame(named as SINP),which was fabricated by the state of the art processing.The ...In this study,we report on the realization of ultraviolet response enhancement in PV cells through the structure of ITO/SiO2/np-Silicon frame(named as SINP),which was fabricated by the state of the art processing.The fabrication process consists of thermal diffusion of phosphorus element into p-type texturized crystal Si wafer,thermal deposition of an ultra-thin silicon dioxide layer(15-20) at low temperature,and subsequent deposition of thick In2O3:SnO2(ITO) layer by RF sputtering.The structure,morphology,optical and electric properties of the ITO film were characterized by XRD,SEM,UV-VIS spectrophotometer and Hall effect measurement,respectively.The results showed that ITO film possesses high quality in terms of antireflection and electrode functions.The device parameters derived from current-voltage(I-V) relationship under different conditions,spectral response and responsivity of the ultraviolet photoelectric cell with SINP configuration were analyzed in detail.We found that the main feature of our PV cell is the enhanced ultraviolet response and optoelectronic conversion.The improved short-circuit current,open-circuit voltage,and filled factor indicate that the device is promising to be developed into an ultraviolet and blue enhanced photovoltaic device in the future.展开更多
The study was conducted to illustrate the physical profile of the three major rivers of Eastern Samar inside the SINP to serve as a reference for the river landscape. Highlights of the profile are river width, depth, ...The study was conducted to illustrate the physical profile of the three major rivers of Eastern Samar inside the SINP to serve as a reference for the river landscape. Highlights of the profile are river width, depth, water velocity and water flow rate, potential source, river stretch, flood height and flood plain as inputs to development and disaster planning. Data presented here were based on field surveys supported and guided by reference maps. Based on the survey, a potential source of Oras and Ulot-Can-avid Rivers is San Jose de Buan, Samar while Suribao River flows from the closed-canopy forest from Borongan-Maydolong-Llorente (Eastern Samar). Flooding and erosion were observed in the three rivers, but the highest silt deposits and the widest flood plain were in Oras River, with the highest water flow rate in the upstream. Erosion and quarrying were observed in all rivers. Bamboo reforestation is conducted in Suribao River as river bank erosion control measures. Results of the survey revealed the high risk to our rivers and river villagers due to flooding and erosion, in addition to the loss of properties and livelihood, and the ecological conservation of the landscape. Collective rehabilitation measures should be crafted for a unified action to address environmental issues parallel to development plans to promote but sustainably manage our resources and protect our villagers.展开更多
Physical profile is significant reference to in addressing areas at risk due to fluvial processes and in establishing the physiographic maps especially in protected areas. Calbiga is one of the major rivers inside the...Physical profile is significant reference to in addressing areas at risk due to fluvial processes and in establishing the physiographic maps especially in protected areas. Calbiga is one of the major rivers inside the Samar Island Natural Park (SINP). The source of Calbiga river was traced at the foot of Mt. Huraw of San Jose de Buan, Samar. The area is at the center of the Samar Island with an elevation of 850 meter above sea level (MASL). The river stretches 36.4 kilometers, with an average span of 44.57 meters, and average depth of 2.6 meters. The average height of the river bank is 7.67 meters, with rage of 5 - 10 meters. Generally, the substrate was sand. On fluvial dynamics, the average water velocity is 0.20 mps with the average water flow of 18.64 m<sup>3</sup>/sec. The floodplain ranged from 10 - 15 meters and 5 to 7 meters high. The river control measures are making a positive impact, though it could be reviewed to address the low elevation of the midstream. Rehabilitation measures at the watershed should be considered, parallel to the policy implementation of Disaster Risk Reduction Management (DRRM) measures.展开更多
基金This work was supported by the Key Project of Natural Science Foundation of China （Grant No. 20135010）National Key Basic Research Program （Grant No. 2002CB513100-10）+2 种基金Key Technologies Research and Development Program （Grant No. 2003 BA310A16）High-Tech Research and Development （863） Program （Grant No. 2003AA302250） the National Natural Science Foundation of China （Grant No. 20405005）.
文摘The bioeffects of silica nanoparticles (SiNP), phosphorylate-terminated nanoparticles (PO4- NP) and amino-terminated nanoparticles (NH2NP) on HaCaT cell line have been studied in this paper. The effects of the three kinds of functionalized silica nanoparticles on adherence, proliferation and cycle of HaCaT cells have been investigated. And the cel- lular uptake of the three kinds of functionalized silica nanoparticles by HaCaT cells has also been exam- ined. Results indicated that the bioeffects of the three kinds of functionalized nanoparticles on HaCaT cells were concentration-dependent. And the three kinds of functionalized nanoparticles all exhibited well bio- compatibility if the concentration was below 0.2 μg/μL. While the cytotoxicities of the three kinds of function- alized nanoparticles on HaCaT cells would increase with the increasing of nanoparticles concentration, and the following order was observed: NH2NP > SiNP > PO4NP. In addition, the quantity and rapidity of cellular uptake of nanoparticles by HaCaT cells were diverse due to the different functional groups. Under the same conditions, NH2NP was most and fast internalized by HaCaT cells, followed by SiNP, and PO4NP was the least and slowest. These results provided theoretical foundation for the safe applica- tion and further modification of silica nanoparticles, which could broaden the application of silica nano- particles in biomedicine.
基金supported by the National Natural Science Foundation of China (Grant No 60876045)Shanghai Leading Academic Discipline Project (Grant No S30105)+1 种基金Innovation Foundation of Shanghai Education Committee (Grant No 08YZ12)R&D Foundation of SHU-SOENs PV Joint Lab (Grant No SS-E0700601)
文摘In this study,we report on the realization of ultraviolet response enhancement in PV cells through the structure of ITO/SiO2/np-Silicon frame(named as SINP),which was fabricated by the state of the art processing.The fabrication process consists of thermal diffusion of phosphorus element into p-type texturized crystal Si wafer,thermal deposition of an ultra-thin silicon dioxide layer(15-20) at low temperature,and subsequent deposition of thick In2O3:SnO2(ITO) layer by RF sputtering.The structure,morphology,optical and electric properties of the ITO film were characterized by XRD,SEM,UV-VIS spectrophotometer and Hall effect measurement,respectively.The results showed that ITO film possesses high quality in terms of antireflection and electrode functions.The device parameters derived from current-voltage(I-V) relationship under different conditions,spectral response and responsivity of the ultraviolet photoelectric cell with SINP configuration were analyzed in detail.We found that the main feature of our PV cell is the enhanced ultraviolet response and optoelectronic conversion.The improved short-circuit current,open-circuit voltage,and filled factor indicate that the device is promising to be developed into an ultraviolet and blue enhanced photovoltaic device in the future.
文摘The study was conducted to illustrate the physical profile of the three major rivers of Eastern Samar inside the SINP to serve as a reference for the river landscape. Highlights of the profile are river width, depth, water velocity and water flow rate, potential source, river stretch, flood height and flood plain as inputs to development and disaster planning. Data presented here were based on field surveys supported and guided by reference maps. Based on the survey, a potential source of Oras and Ulot-Can-avid Rivers is San Jose de Buan, Samar while Suribao River flows from the closed-canopy forest from Borongan-Maydolong-Llorente (Eastern Samar). Flooding and erosion were observed in the three rivers, but the highest silt deposits and the widest flood plain were in Oras River, with the highest water flow rate in the upstream. Erosion and quarrying were observed in all rivers. Bamboo reforestation is conducted in Suribao River as river bank erosion control measures. Results of the survey revealed the high risk to our rivers and river villagers due to flooding and erosion, in addition to the loss of properties and livelihood, and the ecological conservation of the landscape. Collective rehabilitation measures should be crafted for a unified action to address environmental issues parallel to development plans to promote but sustainably manage our resources and protect our villagers.
文摘Physical profile is significant reference to in addressing areas at risk due to fluvial processes and in establishing the physiographic maps especially in protected areas. Calbiga is one of the major rivers inside the Samar Island Natural Park (SINP). The source of Calbiga river was traced at the foot of Mt. Huraw of San Jose de Buan, Samar. The area is at the center of the Samar Island with an elevation of 850 meter above sea level (MASL). The river stretches 36.4 kilometers, with an average span of 44.57 meters, and average depth of 2.6 meters. The average height of the river bank is 7.67 meters, with rage of 5 - 10 meters. Generally, the substrate was sand. On fluvial dynamics, the average water velocity is 0.20 mps with the average water flow of 18.64 m<sup>3</sup>/sec. The floodplain ranged from 10 - 15 meters and 5 to 7 meters high. The river control measures are making a positive impact, though it could be reviewed to address the low elevation of the midstream. Rehabilitation measures at the watershed should be considered, parallel to the policy implementation of Disaster Risk Reduction Management (DRRM) measures.
