Polymerisation characteristics of conventional units for curing composite resins are insufficient considering handling feasibilities particularly in the premolar and molar region. There is also hazardous ocular effect of near ultra-violet part of visible spectra. Sodium high pressure lamp technology has been applied to develop a new high pressure zinc lamp, which is for the first time used for ...

The recognition of barometric pressure was a critical step in the development of environmental physiology. In 1644, Evangelista Torricelli described the first mercury barometer in a remarkable letter that contained the phrase, "We live submerged at the bottom of an ocean of the element air, which by unquestioned experiments is known to have weight." This extraordinary insight seems to have come...

Diatomite (diatomaceous earth) and clay minerals deposits from the mining basin Kolubara, Serbia, are natural materials with high economic potential in many fields. As received treated materials, diatomite were characterized using X-ray diffraction, mercury intrusion porosimetry, particle size distribution, scanning electron microscopy, Fourier-transform infrared spectroscopy. Activity concentr...

Using ultrasonic detection, microhardness test, scanning electron microscope mercury intrusion method and X-ray diffraction, the parameters of sonic time, microhardness, pore size distribution, cumulative pumping high strength concrete under low cycle compression loading are tested after exposure to 200 °C, 400 °C 600 °C. Experimental study showed that with increasing times, rangeability total ...

We selected, as the objects of our research, lignite from the Beizao Mine, gas coal from the Caiyuan Mine, coking coal from the Xiqu Mine, and anthracite from the Guhanshan Mine. We used the mercury intrusion method and the low-temperature liquid nitrogen adsorption method to analyze the structure and shape of the coal pores and calculated the fractal dimensions of different aperture segments i...

Chitosan-collagen scaffolds were produced by freeze-drying method and coated with a thermoresponsive polymer poly(N, N-diethylacrylamide) (PDEAAm) to confer them temperature sensitivity using a non residue technology, the supercritical carbon dioxide (scCO2). All native and coated scaffolds were characterized by SEM, intrusion mercury porosimetry, swelling, biodegradability and mechanical analy...

0016-2361/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.fuel.2009.11.005 * Corresponding author. Tel.: +86 10 82320892; fax E-mail address: [email protected] (Y. Yao). Nuclear magnetic resonance (NMR) has been widely used in petrophysical characterization of sandstones and carbonates, but little attention has been paid in the use of this technique to study petrophysical properties of coal...

CO 2 + O in situ leaching has been extensively applied uranium recovery sandstone-type deposits of China. The geochemical processes impact and constrain the reaction solution migration; thus, it is necessary to study –water–rock process its influence on physical properties uranium-bearing reservoirs. In this work, a simulation experiment was carried out, mineralogical multiscale pore characteri...

PURPOSE The purpose of this study is to determine if automated and aneroid manometers are as accurate a means of determining blood pressure as the mercury manometer. Obtaining vital signs for patients is considered standard of care, yet many dental offices do not routinely perform this health service because of technique inconsistencies and time constraints. The use of automatic blood pressure ...