Now showing items 21-30 of 1238
Elevation Trends in Wide Beach-Ridge Systems Retrieved from Landsat Images and_the SRTM Digital Surface Model
(Coastal Education & Research Foundation, 2015-02)
Beach-ridge systems are a common feature of prograding coastlines and they have been recognized as important archives of late Quaternary sea level. In this paper, the combination of Landsat images and shuttle radar topography ...
Density functional theory study of nitrogen atoms and molecules interacting with Fe(1 1 1) surfaces
(Elsevier Science, 2016-09)
We present Density functional theory (DFT) calculations for the investigation of the structural relaxation of Fe(1 1 1), as well as for the study of the interaction of nitrogen atoms and molecules with this surface. We ...
Temporal variability of the Buenos Aires, Argentina, urban heat island
(Springer Wien, 2012-01)
This paper describes the statistical characteristics and temporal variability of the urban heat island (UHI) intensity in Buenos Aires using 32-year surface meteorological data with 1-h time intervals. Seasonal analyses ...
Quantitative determination of the number of active surface sites and the turnover frequencies for methanol oxidation over metal oxide catalysts: I. Fundamentals of the methanol chemisorption technique and application to monolayer supported molybdenum oxide catalysts
(Elsevier Science, 2000-11)
A detailed study of the methanol chemisorption and oxidation processes on oxide surfaces allowed the development of a method to quantify the number of surface active sites (Ns) of metal oxide catalysts. In situ infrared ...
Quantification of active sites for the determination of methanol oxidation turn-over frequencies using methanol chemisorption and in situ infrared techniques. 1: Supported metal oxide catalysts
(American Chemical Society, 2001-10)
Methanol oxidation over metal oxide catalysts is industrially important for the production of formaldehyde, but knowledge about the intrinsic catalysis taking place is often obscured by a lack of knowledge as to the number ...
Uso de sombras na correção do efeito vinhete
(Universidade Federal do Paraná, 2014-03-01)
When registering spectral radiance from surface targets, digital numbers recorded by the imagery sensor may vary. Such variation causes imperfections on the images coming from aerial surveys. Variation in the image brightness ...
Breaking Oil-in-water Emulsions Stabilized By Yeast
(ELSEVIER SCIENCE BVAMSTERDAM, 2015)
Influence of salinity on the interannual heat storage trends in the Atlantic estimated from altimeters and Pilot Research Moored Array in the Tropical Atlantic data
(AMER GEOPHYSICAL UNION, 2008)
Changes in the oceanic heat storage (HS) can reveal important evidences of climate variability related to ocean heat fluxes. Specifically, long-term variations in HS are a powerful indicator of climate change as HS represents ...
Three-dimensional analysis of fracture, corrosion and wear surfaces
(PERGAMON-ELSEVIER SCIENCE LTD, 2010)
A brief look at the history of fractography has shown a recent trend in the quantification of topographic parameters through the use of three-dimensional reconstruction techniques, which associate SEM stereoscopy and ...
β-Cristobalite (001) surface as 4-formaminoantipyrine adsorbent: First principle study of the effect on adsorption of surface modification
(Elsevier Science, 2016-12)
Silica based materials find applications as excipients and particularly as drug delivery agents for pharmaceutical drugs. Their performance can be crucially affected by surface treatments, as it can modify the adsorption ...