Results 21 to 30 of about 8,121 (248)
Extinction Curves for Graphite-Silicate Grain Mixtures [PDF]
Symposium - International Astronomical Union, 1970 Mixtures of graphite particles ejected from carbon stars and silicates from oxygen-rich giants are capable of producing excellent fits to the observed interstellar extinction curve. The fits extend over the entire wavelength range of the observations, and include a hump at ~ 2200 Å in the ultraviolet due to the graphite components of the mixtures.
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Massive Protostellar Disks as a Hot Laboratory of Silicate Grain Evolution
The Astrophysical Journal, 2023 Typical accretion disks around massive protostars are hot enough for water ice to sublimate. We here propose to utilize the massive protostellar disks for investigating the collisional evolution of silicate grains with no ice mantle, which is an ...
Ryota Yamamuro +2 more
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THE EFFECTS OF RE-PRESSING ON BIAXIAL FLEXURAL STRENGTH AND MICROSTRUCTURE OF CELTRA PRESS (AN INVITRO STUDY) [PDF]
Alexandria Dental Journal, 2022 Introduction: Celtra® Press is a zirconia-reinforced lithium silicate (ZLS) glass-ceramic containing 10 % zirconium oxide (ZrO2). This material is used to fabricate dental restorations by pressing technique.
Sherif Yehia, Ihab Hammad, Amir Azer
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Frontiers in Astronomy and Space Sciences, 2022 The study of exoplanetary atmospheres extends the frontiers of astronomy, astrophysics, and astrochemistry. Moreover, studies of exoplanets as being linked to the search for extraterrestrial life and other habitable planets are of interest not only for ...
Alexey Potapov, Jeroen Bouwman
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Occurrence of rice blast on and grain quality of irrigated rice fertilized with nitrogen and silicates [PDF]
Pesquisa Agropecuária Brasileira, 2019 : The objective of this work was to evaluate the effects of fertilization with nitrogen topdressing and silicates, as well as of the use of fungicides, on the occurrence of rice blast on panicles, milling yield, and whole grains, vitreous grains, and ...
Lillian Matias de Oliveira +7 more
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Journal of Advanced Ceramics, 2023 Rare earth (RE) silicate is one of the most promising environmental barrier coatings for silicon-based ceramics in gas turbine engines. However, calcium–magnesium–alumina–silicate (CMAS) corrosion becomes much more serious and is the critical challenge ...
Zhilin Tian +9 more
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Effect of Temperature on Chromite-Based Moulding Sands Bonded with Sodium Silicate
Archives of Foundry Engineering, 2016 In the paper, a research on effects of baking temperature on chromite sand base of moulding sands bonded with sodium silicate is presented. Pure chromite sand and its chromite-based moulding sand prepared with use of sodium silicate were subjected to ...
Stachowicz M. +3 more
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Chemistry of accessory chromian spinel in serpentinites from the Penjwen ophiolite rocks, Zagros thrust zone, [PDF]
Kirkuk Journal of Science, 2009 Chromian spinel is a widespread accessory mineral in ultramafic rocks of the Penjwen ophiolite, occurring in two modes; fresh grains in dunite rocks that crop out in the eastern part and altered grains in serpentinized peridotites in the western part of ...
Sabah A.Ismail
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Effect of Temperature on Chromite-Based Moulding Sands Bonded with Sodium Silicate
Archives of Foundry Engineering, 2017 In the paper, a research on effects of baking temperature on chromite sand base of moulding sands bonded with sodium silicate is presented. Pure chromite sand and its chromite-based moulding sand prepared with use of sodium silicate were subjected to ...
Stachowicz M. +3 more
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The Astrophysical Journal, 2013 Amorphous, astrophysically relevant silicates were prepared by laser ablation of siliceous targets and subsequent quenching of the evaporated atoms and clusters in a helium/oxygen gas atmosphere. The described gas-phase condensation method can be used to synthesize homogeneous and astrophysically relevant silicates with different compositions ranging ...
Sabri, T. +6 more
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