Results 31 to 40 of about 41,579 (296)

Regional Lithological Mapping Using ASTER-TIR Data: Case Study for the Tibetan Plateau and the Surrounding Area

open access: yesGeosciences, 2016
The mineralogical indices the Quartz Index (QI), Carbonate Index (CI) and Mafic Index (MI) for ASTER multispectral thermal infrared (TIR) data were applied to various geological materials for regional lithological mapping on the Tibetan Plateau.
Yoshiki Ninomiya, Bihong Fu
doaj   +1 more source

Layer silicates in a chondritic porous interplanetary dust particle

open access: yes, 1985
Analytical electron microscopy on individual grains from a portion of a chondritic porous interplanetary dust particle (aggregate W7029C1 from the NASA Johnson Space Center Cosmic Dust Collection) shows that layer silicates compose 50 percent of the ...
Rietmeijer, Frans J.M.   +5 more
core   +1 more source

Effects of temperature and humidity on adhesion of water scale to glass substrates

open access: yesInternational Journal of Ceramic Engineering & Science, 2021
The formation of silica scales from water on ceramics is a significant problem, and there is an urgent need to develop methods to prevent its formation or to remove it.
Shogo Hayashi   +4 more
doaj   +1 more source

U(VI) Coordination Modes in Complex Uranium Silicates: Cs[(UO6)2(UO2)9(Si2O7)F] and Rb2[(PtO4)(UO2)5(Si2O7)]

open access: yesChemistry, 2022
Crystals of two new inorganic uranyl silicates, Cs[(UO6)2(UO2)9(Si2O7)F] (1) and Rb2[(PtO4)(UO2)5(Si2O7)] (2), were produced from melts in evacuated silica tubes.
Evgeny V. Nazarchuk   +3 more
doaj   +1 more source

Silicates, Silicate Weathering, and Microbial Ecology [PDF]

open access: yesGeomicrobiology Journal, 2001
Mineralogy, microbial ecology, and mineral weathering in the subsurface are an intimately linked biogeochemical system. Although bacteria have been implicated indirectly in the accelerated weathering of minerals, it is not clear if this interaction is simply the coincidental result of microbial metabolism, or if it represents a specific strategy ...
openaire   +1 more source

Biosilicification Drives a Decline of Dissolved Si in the Oceans through Geologic Time

open access: yesFrontiers in Marine Science, 2017
Biosilicification has driven variation in the global Si cycle over geologic time. The evolution of different eukaryotic lineages that convert dissolved Si (DSi) into mineralized structures (higher plants, siliceous sponges, radiolarians, and diatoms) has
Daniel J. Conley   +10 more
doaj   +1 more source

EVALUATION OF FLEXURAL RIGIDITY OF COTTON FABRICS TREATED WITH POLIURETHANE AND ACRILYC RESIN AND MONTMORILLONITE PARTICLES [PDF]

open access: yesAnnals of the University of Oradea: Fascicle of Textiles, Leatherwork, 2020
Textile manufacturers are demonstrating an increasing interest in the application of different types of micro or nanoparticles in order to add new properties to the fabric.
CARETTE Margaux   +4 more
doaj  

Importance of laboratory experimental studies of silicate grains for exoplanet atmosphere characterization

open access: yesFrontiers 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
doaj   +1 more source

The formation mechanism of the porous structure of glass ceramics from siliceous rock

open access: yesMagazine of Civil Engineering, 2020
Porous glass ceramic materials are widely used in industrial and civil engineering due to a number of redeeming features, such as high strength, low thermal conductivity, incombustibility, environmental friendliness, etc. A large number of researches are
Anatolij Ermakov   +3 more
doaj   +1 more source

Apical root-end filling with tricalcium silicate-based cement in a patient with diabetes mellitus: A case report [PDF]

open access: yesVojnosanitetski Pregled, 2016
Introduction. The material used for root-end filling has to be biocompatible with adjacent periapical tissue and to stimulate its regenerative processes.
Biočanin Vladimir   +8 more
doaj   +1 more source

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