Results 251 to 260 of about 7,471,443 (306)
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Surface Roughness of Microfilled Composites
The Journal of the American Dental Association, 1981Average surface roughness values, profile tracings, and surface microstructures of three microfilled composites and a conventional composite were studied with respect to final finishing procedures. Surfaces cured against Mylar matrix strips were the smoothest and were similar for all composites.
J B, Dennison, P L, Fan, J M, Powers
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Atmospheric Composition and Surface Exchanges
2004Atmospheric chemistry is a relatively new scientific discipline. Research in this area has intensified dramatically in the last 3–4 decades because of the concerns that growing emissions of pollutants could have severe consequences for humankind. Although the major chemical compounds present in the atmosphere were identified long ago, it is only during
Brasseur, G., Steffen, W., Granier, C.
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The Surface Composition of Ceres
Space Science Reviews, 2010Our understanding of the composition of Ceres is driven by remote sensing of its surface. We review spectral observations of Ceres over wavelengths from the ultraviolet to the radio, as well as non-spectral data such as thermal inertia, photometric properties, radar experiments, and surface variability.
Andrew S. Rivkin +7 more
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The Martian Surface Composition
Space Science Reviews, 2001Mars is unique to have undergone all planetary evolutionary steps, without global resets, till its geological death: this is reflected in the variety of its surface features. The determination of Mars surface composition has thus the potential to identify the processes responsible for the entire Mars evolution, from geological timescales to seasonal ...
Jean-Pierre Bibring, Stéphane Erard
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The surface composition of Amalthea
Icarus, 1980It is proposed that charged particles from the Jovian magnetosphere, contaminants such as sulfur from Io, and high-velocity micrometeoritic matter, combine to darken, redden, and alter the surface of Amalthea revealed by Voyager; whose few isolated bright spots have a distinct greenish spectrum.
J. Gradie, P. Thomas, J. Veverka
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Surface composition of polystyrene
Journal of Applied Polymer Science, 1988AbstractThe physical and chemical properties of bulk polymers are well understood and have been measured exhaustively for numerous systems, but the properties of polymer surfaces are quite often different from those observed in the bulk and are usually not as easily measurable. Since many polymer properties vary with molecular weight, it is of interest
Ronald D. Goldblatt +4 more
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Surface Composition of Wustite
Berichte der Bunsengesellschaft für physikalische Chemie, 1980AbstractUsing a solid electrolyte cell inside an UHV‐system the surface composition of oxides and metals can be studied at high temperatures 700 to 1000°C and well defined oxygen activities in the range po2 = 10−10 to 10−25 bar. AES‐measurements on wustite have shown that at temperatures > 800°C the composition of the surface shows the same change ...
H. J. Grabke, H. Viefhaus
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1994
Abstract The first questions to be asked about a surface are: what atoms are present and what are their concentrations? If techniques can be found to provide the answers to these questions, then the next, more detailed, question is: how are the atoms bound to each other? These are the questions of surface chemistry.
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Abstract The first questions to be asked about a surface are: what atoms are present and what are their concentrations? If techniques can be found to provide the answers to these questions, then the next, more detailed, question is: how are the atoms bound to each other? These are the questions of surface chemistry.
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A composition based approach to predict density, viscosity and surface tension of biodiesel fuels
Fuel, 2021Anand Krishnasamy +2 more
exaly