Results 61 to 70 of about 289,818 (249)

Processing of Calcium Magnesium Silicates by the Sol–Gel Route

open access: yesGels, 2022
In this work, calcium magnesium silicate ceramics were processed through the sol–gel method in order to study the crystalline and morphological properties of the resulting materials in correlation with the compositional and thermal parameters. Tetraethyl
Andrada-Elena Alecu   +5 more
doaj   +1 more source

Dust Processing and Grain Growth in Protoplanetary Disks in the Taurus-Auriga Star-Forming Region

open access: yes, 2008
Mid-infrared spectra of 65 T Tauri stars (TTS) taken with the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope are modeled using dust at two temperatures to probe the radial variation in dust composition in the uppermost layers of ...
A. Li   +85 more
core   +1 more source

Interstellar Silicon Depletion and the Ultraviolet Extinction [PDF]

open access: yes, 2017
Spinning small silicate grains were recently invoked to account for the Galactic foreground anomalous microwave emission. These grains, if present, will absorb starlight in the far ultraviolet (UV).
Li, Aigen, Mishra, Ajay
core   +3 more sources

On the Relation of Silicates and SiO Maser in Evolved Stars [PDF]

open access: yes, 2017
The SiO molecule is one of the candidates for the seed of silicate dust in the circumstellar envelope of evolved stars, but this opinion is challenged. In this work we investigate the relation of the SiO maser emis- sion power and the silicate dust emission power. With both our own observation by using the PMO/Delingha 13.7-m telescope and archive data,
arxiv   +1 more source

Crystalline Silicates in Evolved Stars. I. Spitzer/IRS Spectroscopy of IRAS16456-3542, 18354-0638, and 23239+5754 [PDF]

open access: yes, 2013
We report the Spitzer Infrared Spectrograph (IRS) observations of three evolved stars: IRAS 16456-3542, 18354-0638, and 23239+5754. The 9.9--37.2um Spitzer/IRS high resolution spectra of these three sources exhibit rich sets of enstatite-dominated crystalline silicate emission features.
arxiv   +1 more source

Tin-containing silicates: identification of a glycolytic pathway via 3-deoxyglucosone

open access: yes, 2016
Inorganic glycolytic systems, capable of transforming glucose through a cascade of catalytic steps, can lead to efficient chemical processes utilising carbohydrates as feedstock.
Søren Tolborg   +9 more
semanticscholar   +1 more source

Reactivity and applications of layered silicates and layered double hydroxides.

open access: yesDalton Transactions, 2014
Layered materials, such as layered sodium silicates and layered double hydroxides (LDHs), are well-known for their remarkable adsorption, intercalation and swelling properties.
T. Selvam   +2 more
semanticscholar   +1 more source

On silicic æthers [PDF]

open access: yesThe London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science
n ...
openaire   +2 more sources

Organically Modified Silicates (Ormosils) as Adhesives for Siliceous Surfaces [PDF]

open access: yesThe Journal of Adhesion, 1987
Abstract Adhesion to glass surfaces still may be a problem under “heavy duty” conditions such as temperature and moisture or both. In many cases the problem may be overcome by use of adhesion promoters such as reactive silanes. These silanes remove water films from the glass surface by chemical reaction, are able to form chemical bonds to the glass ...
openaire   +2 more sources

Silicate-break galaxies: an efficient selection method of distant ultraluminous infrared galaxies [PDF]

open access: yesMon.Not.Roy.Astron.Soc. 357 (2005) 165-173, 2004
We present a photometric selection method for ULIRGs in the redshift range of z=1 -- 2. We utilize the most prominent spectral feature of ULIRGs, i.e. the silicate absorption feature at 9.7 micron and an optimized filter system at mid-infrared wavelengths. These `silicate-break' galaxies could be selected by using colour anomalies owing to the silicate
arxiv   +1 more source

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