Results 111 to 120 of about 218,762 (405)

A Modern Roman‐Inspired Concrete with Daytime Radiative Cooling Capacity

open access: yesAdvanced Science, EarlyView.
Coolcrete, inspired by ancient Roman concrete, is a new cementitious material with photonic properties enabling passive daytime radiative cooling. Made from quicklime and zeolites, it reduces cooling energy demand, lowers CO2 emissions, and may eliminate urban heat islands.
Jorge S. Dolado   +11 more
wiley   +1 more source

Organic chemical signatures of New Zealand carbonate concretions and calcite fracture fills as potential fluid migration indicators [PDF]

open access: yes, 2006
Macroscopic calcite crystals are common in sedimenta¬ry strata, occurring both as tectonic veins and also filling one or more generations of septarian rupture or later brittle fractures in calcareous concretions.
Nelson, Campbell S., Pearson, Michael J.
core   +1 more source

Effect of ball milling in a tumbling ball mill on the properties of multi-wall carbon nanotubes [PDF]

open access: yes, 2008
The effects of ball milling on various properties of ground multi-wall carbon nanotubes were studied. These properties were granulometry, SEM,specific surface area, density, crystalline structure, surface chemical analysis and thermogravimetry.
Le Bolay, Nadine, Zapata-Massot, Céline
core   +1 more source

Enhancing the selectivity of carboxylic acid surfactants in fluorite flotation via cation–π interaction coupling

open access: yesAIChE Journal, EarlyView.
Abstract The rapid depletion of high‐grade fluorite deposits has made the purification of fluorite from low‐grade ores increasingly critical. Traditional carboxylate surfactants face significant challenges in fluorite/calcite separation due to their similar affinity for both minerals.
Jiang Yu   +6 more
wiley   +1 more source

Data report: late Miocene to early Pliocene coccolithophore and foraminiferal preservation at Site U1338 from scanning electron microscopy [PDF]

open access: yes, 2014
The late Miocene to early Pliocene carbonate-rich sediments recovered at Integrated Ocean Drilling Program (IODP) Site U1338 during the Expedition 320/321 Pacific Equatorial Age Transect (PEAT) program contain abundant calcareous nanno- and microfossils.
Drury, Anna Joy   +3 more
core   +1 more source

Selective Flotation of Calcite from Fluorite: A Novel Reagent Schedule

open access: yes, 2016
Fluorite is an important strategic mineral. In general, fluorite ores will contain a certain amount of calcite gangue mineral. Thus, they need to be separated from each other.
Zhiyong Gao   +4 more
semanticscholar   +1 more source

Biomineralization processes of calcite induced by bacteria isolated from marine sediments

open access: yesBrazilian Journal of Microbiology, 2015
Biomineralization is a known natural phenomenon associated with a wide range of bacterial species. Bacterial-induced calcium carbonate precipitation by marine isolates was investigated in this study.
Shiping Wei   +5 more
semanticscholar   +1 more source

Characterization and Beneficiation of Indigenous Marble Waste to Remove Siliceous and Ferrous Impurities

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT In this study, marble waste (MARWAS) beneficiation was done using thermal, physical, and chemical means. The MARWAS samples collected from dumping yards of Kishangarh and Revdar districts of Rajasthan (India) and Ambaji district of Gujarat (India) were characterized by chemical composition analysis, scanning electron microscopy with energy ...
Vinod Kumar Dhakad, Susanta Kumar Jana
wiley   +1 more source

Morphological characteristic and causes of color for the crystals of calcite from Liboje

open access: yesGeologija, 2014
The crystals of calcite from the quarry Liboje were investigated and compared with calcite crystals from other quarries in the surrounding area of Celje.
Maja Plaskan   +2 more
doaj   +1 more source

Optimizing electron backscatter diffraction of carbonate biominerals—resin type and carbon coating [PDF]

open access: yes, 2009
Electron backscatter diffraction (EBSD) is becoming a widely used technique to determine crystallographic orientation in biogenic carbonates. Despite this use, there is little information available on preparation for the analysis of biogenic carbonates ...
Alberto Pérez-Huerta   +4 more
core   +1 more source

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