The study of several perlites with different grain sizes showed that water content, preheating temperature, expanding temperature, calcination time and size of raw particles had considerable effect on the glassy structure and expansion volume.
The Langmuir constant b and Freundlich constant K f values expanded with expanding temperature from 15 to 30 °C inferring that the adsorption procedure was endothermic in nature and Pb2+ displayed the higher affinity for the adsorbent at the higher temperature than at the lower temperature.
The GS was prepared from graphene oxide by an expansion process and different expanding temperatures were studied and polystyrene sulfonate sodium was used as dispersion agent of hydrophobic GS.
As the universe expanded, the temperature would have dropped, each photon being redshifted by the cosmological expansion to longer wavelength, as the American physicist Richard C. Tolman had already shown in 1934.
We expanded the temperature interval down to 55 °C and used the simplest permanent heating procedure, without employing fluctuating drying/wetting conditions.
This footnote was appended on 17 November 2011: The Indianapolis Museum of Art has asked us to make clear that it has expanded the temperature and relative humidity ranges in its permanent collection galleries and storage areas based on studies conducted by the Smithsonian Institution Conservation Analytical Laboratory in 1994.
This paper reviews AMR (Active Magnetic Regenerative) refrigeration technology for low temperature applications that is a novel cooling method to expand the temperature span of magnetic refrigerator.
The materials also work with refrigerants other than water, which expands the temperature range at which cooling is possible.
The combination of Fe- and Cu-based SCR catalysts provides a viable solution to expand the temperature window of high NOx conversion.
Recent calculations have shown that the refrigerant capacity (RC) of magnetic refrigerants can be enhanced using multiphase materials or composites, which expand the temperature range over which a significant magnetic entropy change can be obtained.
