Results 31 to 40 of about 2,901 (210)

Effect of calcium concentration on calcite flotation from apatite using carbonic gas

open access: yesREM: International Engineering Journal, 2020
The flotation process currently considered for apatite concentration from the Santa Quitéria phosphate deposit (Brazil), involves bulk flotation of apatite and calcite with anionic collector at pH=10 followed by calcite flotation at pH=5.5, adjusted with
Amanda Soares de Freitas   +2 more
doaj   +1 more source

Phonon‐Driven Tetrahedral Tilts Enable Ultralow Bulk Thermal Expansion and Interstitial Oxide‐Ion Migration in Phenacite Solid Electrolytes

open access: yesAdvanced Science, EarlyView.
This work demonstrates a design paradigm of phonon‐driven negative‐thermal‐expansion (NTE) flexible framework that exploits the intrinsic lattice flexibility of NTE frameworks to simultaneously suppress thermal expansion and activate oxide‐ion conduction, offering a promising strategy to mitigate TEC mismatch in solid‐state ionic devices.
Xiaohui Li   +10 more
wiley   +1 more source

Natural Aging of Biomaterials in Ambient and Physiological Environments

open access: yesAdvanced NanoBiomed Research, EarlyView.
Biomaterials used in biomedical applications can change their physical properties over time, even under ambient and physiological conditions. This review highlights key studies on the natural aging of materials ranging from soft hydrogels to metals and ceramics, emphasizing how time‐dependent changes influence function and performance.
Shuyu Zhang, Anne E. Staples
wiley   +1 more source

REMEDIATION OF THE SERBIAN SOILS CONTAMINATED BY RADIONUCLIDES IN THE FUNCTION OF THE SUSTAINABLE DEVELOPMENT [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2008
Phosphate-induced metal stabilization (PIMS) using apatite stabilizes uranium in situ, by chemically binding it into the new low-solubility (Ksp=10-49) phase.
M. Stojanović   +4 more
doaj  

APATITES FORMATION ON ELECTRODEPOSITED CALCIUM PHOSPHATES IN THE Ca(NO3)2 / NH4H2PO4 AND CаCO3 / Ca(H2PO4)2 SYSTEMS

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2021
Calcium phosphate coatings on titanium plates were obtained by electrochemical deposition at room temperature in a two-electrode cell at a constant current density of 30 mA/sm^2 and a deposition time of 10 min, and brushite coatings from Ca(NO3)2 ...
V.K. Krut’ko   +4 more
doaj   +1 more source

Apatite Revisited: The Role of Anisotropy in Apatite Analysis [PDF]

open access: yesMicroscopy and Microanalysis, 2010
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.
DT Adams, AE Koenig, HA Lowers
openaire   +1 more source

Color‐Center‐Driven Inorganic Photochromic Materials: Mechanisms, Classifications and Property Modulation

open access: yesAdvanced Physics Research, EarlyView.
This review explores color‐center‐mediated photochromism in inorganic materials and elaborates on defect‐originated photochromic fundamentals. It categorizes typical material systems by three core color‐center sources, including oxygen vacancies, non‐oxygen anion‐related defects, and cation‐related defects and summarizes feasible defect engineering ...
Jingxuan Zhang   +3 more
wiley   +1 more source

Inhibition of calcium phosphate precipitation by bile salts: a test of the Ca(2+)-buffering hypothesis.

open access: yesJournal of Lipid Research, 1994
The ability of bile salts to inhibit the precipitation of either calcium hydroxyapatite or its precursor, amorphous calcium phosphate, by reducing Ca2+ activity or poisoning nascent crystals was determined.
R S Crowther, M Okido
doaj   +1 more source

Differences in predominant collagen fiber orientation between dorsal and plantar trabecular bone tracts of adult mule deer calcanei suggest strain‐mode‐specific adaptation

open access: yesThe Anatomical Record, EarlyView.
Polarized microscopic images of the outer bone cortex (a and b) and deeper trabecular bone (c and d) of the deer calcaneus in thin cross‐sections. The brighter gray levels reflect more oblique‐to‐transverse collagen fibers in the compression/dorsal bone (a, c) and the darker gray levels reflect more longitudinal collagen in the tension/plantar bone (b,
John G. Skedros   +3 more
wiley   +1 more source

Mineralogy of interior jewellery ammonites of the Samara region

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2022
Background. Ammonite products are increasingly gaining in popularity. Ammonites are characterised by a variety of colour shades, shapes and sizes, making them suitable for manufacturing a wide range of souvenir and jewellery products.
D. A. Petrochenkov, E. Yu. Baraboshkin
doaj   +1 more source

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