Results 41 to 50 of about 289,818 (249)

Lung Pathology in U.S. Coal Workers with Rapidly Progressive Pneumoconiosis Implicates Silica and Silicates.

American Journal of Respiratory and Critical Care Medicine, 2016
RATIONALE Recent reports of progressive massive fibrosis and rapidly progressive pneumoconiosis in U.S. coal miners have raised concerns about excessive exposures to coal mine dust, despite reports of declining dust levels.
R. Cohen, E. Petsonk, C. Rose, Byron Young, M. Regier, Asif Najmuddin, J. L. Abraham, A. Churg, F. Green   +8 more
semanticscholar   +1 more source

The Detection of Crystalline Silicates in Ultra-Luminous Infrared Galaxies

, 2005
Silicates are an important component of interstellar dust and the structure of these grains -- amorphous versus crystalline -- is sensitive to the local physical conditions.
A. G. G. M. Tielens, B. Sargent, B. T. Soifer, Clavel J., Dorschner J., G. C. Sloan, H. W. W. Spoon, J. Cami, J. R. Houck, L. Armus, Lahuis F., Laurent O., Malfait K., Molster F., Rotundi A., Sylvester R. J., V. Charmandaris, Voors R. H. M., Voors R. H. M.   +18 more
core   +2 more sources

A Spitzer-IRS Detection of Crystalline Silicates in a Protostellar Envelope [PDF]

, 2011
We present the Spitzer Space Telescope Infrared Spectrograph spectrum of the Orion A protostar HOPS-68. The mid-infrared spectrum reveals crystalline substructure at 11.1, 16.1, 18.8, 23.6, 27.9, and 33.6 microns superimposed on the broad 9.7 and 18 ...
An, Bohren, Boogert, Boogert, Bouwman, Chiar, Ciardi, D’Alessio, Furlan, Gordon, Green, Harker, Houck, Huffman, Johnstone, Jäger, Kemper, Mezger, Osorio, Peterson, Riaz, Sargent, Sargent, Speck, Spoon, Watson, Werner, Williams   +27 more
core   +2 more sources

On the Silicate Crystallinities of Oxygen-Rich Evolved Stars and Their Mass Loss Rates [PDF]

, 2016
For decades ever since the early detection in the 1990s of the emission spectral features of crystalline silicates in oxygen-rich evolved stars, there is a long-standing debate on whether the crystallinity of the silicate dust correlates with the stellar mass loss rate.
arxiv   +1 more source

Silicates in orthopedics and bone tissue engineering materials.

Journal of Biomedical Materials Research. Part A, 2017
Following the success of silicate-based glasses as bioactive materials, silicates are believed to play important roles in promoting bone formation and have therefore been considered to provide a hydroxyapatite (HAP) surface layer capable of binding to ...
Xianfeng Zhou, Nianli Zhang, Steven Mankoci, Nita Sahai   +3 more
semanticscholar   +1 more source

Calcium silicates synthesised from industrial residues with the ability for CO2 sequestration [PDF]

, 2014
This work explored several synthesis routes to obtain calcium silicates from different calcium-rich and silica-rich industrial residues. Larnite, wollastonite and calcium silicate chloride were successfully synthesised with moderate heat treatments below
Esquivias Fedriani, Luis María, López, Antonio, Morales Flórez, Víctor, Moriña, Isabel, Santos, Alberto   +4 more
core   +1 more source

Effect of Three Commonly Consumed Beverages on Surface Roughness of Polished and Glazed Zirconia-Reinforced Lithium Silicate Glass Ceramics

Frontiers in Dentistry, 2019
Objectives: This study aimed to assess the effect of three commonly consumed beverages on surface roughness of polished and glazed zirconia-reinforced lithium silicate (ZLS) glass ceramics.
Farnaz Firouz, Fariborz Vafaee, Zahra Khamverdi, Sara Khazaei, Somayeh Ghorbani Gholiabad, Mahsa Mohajeri   +5 more
doaj   +1 more source

Carbonate Formation in Non-Aqueous Environments by Solid-Gas Carbonation of Silicates

, 2012
We have produced synthetic analogues of cosmic silicates using the Sol Gel method, producing amorphous silicates of composition Mg(x)Ca(1-x)SiO3. Using synchrotron X-ray powder diffraction on Beamline I11 at the Diamond Light Source, together with a ...
Day, S. J., Evans, A., Parker, J. E., Thompson, S. P.   +3 more
core   +1 more source

Pixie Dust: The Silicate Features in the Diffuse Interstellar Medium [PDF]

Astrophys.J.637:774-785,2006, 2005
We have analyzed the 9.7 and ``18'' micron interstellar silicate absorption features along the line of sight toward four heavily extincted galactic WC-type Wolf-Rayet (WR) stars. We construct two interstellar extinction curves from 1.25 to 25 micron using near-IR extinction measurements from the literature along with the silicate profiles of WR 98a ...
arxiv   +1 more source

Interstellar Silicate Dust in the z=0.89 Absorber Towards PKS 1830-211: Crystalline Silicates at High Redshift?

, 2012
We present evidence of a >10-sigma detection of the 10 micron silicate dust absorption feature in the spectrum of the gravitationally lensed quasar PKS 1830-211, produced by a foreground absorption system at redshift 0.886. We have examined more than 100
Aguirre, Aguirre, Ardila, Bernard-Salas, Bernstein, Boissé, Bottinelli, Bouwman, Bringa, Calzetti, Carrez, Chary, Chengalur, Chiar, Chiar, Courbin, Dai, Daniel E. Welty, Debopam Som, Djorgovski, Donald G. York, Donnarumma, Dorschner, Elbaz, Fabian, Falco, Ferraro, Frye, Gibb, Gibb, Giovanni Vladilo, Gordon, Gruendl, Hao, Harker, Higdon, Honda, Houck, Jäger, Kemper, Kemper, Kulkarni, Kulkarni, Kulkarni, Kulkarni, Lehár, Lovell, Lynch, Madau, McGough, Molster, Monique C. Aller, Mutschke, Papovich, Pei, Pettini, Press, Prochaska, Prochaska, Prochaska, Rho, Riess, Roche, Roche, Shapley, Smith, Sofia, Spoon, Stanghellini, Storrie-Lombardi, Subrahmanyan, Subrahmanyan, Sylvester, Uchida, van Diedenhoven, Varsha P. Kulkarni, Weingartner, Welty, Werner, Whittet, Whittet, Wiklind, Winn, Wooden   +83 more
core   +1 more source