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RISS 인기검색어
- 검색키워드
- 저자 : Mazeran, Pierre-Emmanuel (검색결과 2 건)
- 무료
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Assessment of GOCI Radiometric Products using MERIS, MODIS and Field Measurements
Nicolas Lamquin,Constant Mazeran,David Doxaran,류주형,박영제 한국해양과학기술원 2012 Ocean science journal Vol.47 No.3
The first Geostationary Ocean Color Imager (GOCI) launched by South Korea in June 2010 constitutes a major breakthrough in marine optics remote-sensing for its capabilities to observe the diurnal cycles of the ocean. The light signal recorded at eight wavelengths by the sensor allows, after correction for Solar illumination and atmospheric effects, the retrieval of coloured biogeochemical products such as the chlorophyll, suspended sediment and coloured dissolved organic matter concentrations every hour between 9:00 am and 4:00 pm local time around the Korean peninsula. However operational exploitation of the mission needs beforehand a sound validation of first the radiometric calibration, i.e. inspection of the top-of-atmosphere reflectance, and second atmospheric corrections for retrieval of the water-leaving reflectance at sea surface. This study constitutes a contribution to the quality assessment of the GOCI radiometric products generated by the Korea Ocean Satellite Center (KOSC) through comparison with concurrent data from the MODerate-resolution Imaging Spectroradiometer (MODIS, NASA) and MEdium Resolution Imaging Spectrometer (MERIS, ESA) sensors as well as in situ measurements. These comparisons are made with spatially and temporally collocated data. We focus on Rayleigh-corrected reflectance (ρRC) and normalized remote-sensing marine reflectance (nRrs). Although GOCI compares reasonably well with MERIS and MODIS, what demonstrates the success of Ocean Colour in geostationary orbit, we show that the current GOCI atmospheric correction systematically masks out data over very turbid waters and needs further examination and correction for future release of the GOCI products.
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Photoinduced Development of Antibacterial Materials Derived from Isosorbide Moiety
Lorenzini, Cedric,Haider, Adnan,Kang, Inn-Kyu,Sangermano, Marco,Abbad-Andalloussi, Samir,Mazeran, Pierre-Emmanuel,Lalevé,e, Jacques,Renard, Estelle,Langlois, Valé,rie,Versace, Davy-Louis American Chemical Society 2015 Biomacromolecules Vol.16 No.3
<P>A straightforward method for immobilizing in situ generated silver nanoparticles on the surface of a photoactivable isosorbide-derived monomer is developed with the objective to design a functional material having antibacterial properties. The photoinduced thiol–ene mechanism involved in these syntheses is described by the electron spin resonance/spin trapping technique. The resulting materials with or without silver nanoparticles (Ag NPs) were used as films or as coatings on glass substrate. The surface of the synthesized materials was characterized by X-ray photoelectron spectroscopy and scanning electron microscopy, and their thermal and mechanical properties were evaluated by dynamic-mechanical thermal tests, differential scanning calorimetry, thermogravimetric analyses, along with pencil hardness, nanoindentation, and scratch resistance tests. The photoinduced formation of Ag NPs is also confirmed by UV spectrophotometry. Finally, a primary investigation demonstrates the antibacterial properties of the isosorbide-derived material against <I>Staphylococcus aureus</I> and <I>Escherichia coli</I>, as well as its cytocompatibility toward NIH 3T3 fibroblastic cells.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/bomaf6/2015/bomaf6.2015.16.issue-3/bm501755r/production/images/medium/bm-2014-01755r_0016.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/bm501755r'>ACS Electronic Supporting Info</A></P>
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