Results 151 to 160 of about 756,097 (272)

The Materiality of the Cloggs Cave Rockshelter's Painting, GunaiKurnai Country (East Gipplsland), Southeastern Australia

open access: yesArchaeometry, EarlyView.
ABSTRACT The materiality of the white pigment motif at the Cloggs Cave rockshelter, near Buchan in GunaiKurnai Country (southeastern Australia), contains details about the cultural and environmental contexts in which the art was created and preserved. Here, we (1) present physicochemical analyses of the pigment composition; (2) explore implications for
Courtney Webster   +8 more
wiley   +1 more source

Incorporation of Sodium and Aluminum in Cementitious Calcium-Alumino-Silicate-Hydrate C‑(A)-S‑H Phases Studied by 23Na, 27Al, and 29Si MAS NMR Spectroscopy

open access: yes
The partial replacement of Portland cement by aluminosilicate-rich supplementary cementitious materials (SCMs) represents a valuable approach to lower the CO2 footprint of concrete.
Sheng-Yu Yang (1627729)   +3 more
core   +1 more source

Towards an ‘absolute’ timing of biostratigraphic and environmental phases from the Saalian late glacial to the Weichselian pleniglacial in central Europe—Insights from a lacustrine succession in Lichtenberg, northern Germany

open access: yesBoreas, EarlyView.
Palynological records are central to the biostratigraphic subdivision of the Late Pleistocene in central Europe. Yet many interglacial and interstadial phases—such as the Eemian, Brörup and Odderade—remain only poorly constrained in time due to limited numerical dating.
Michael Hein   +19 more
wiley   +1 more source

Afghanite: A New Silicate‐Matrix Reference Material for In Situ Halogen and Sulfur Microanalysis

open access: yesGeostandards and Geoanalytical Research, EarlyView.
Key Points A new silicate matrix reference material for in situ chlorine and sulfur determination. Homogeneous across all measured elements. No matrix effects for Cl when calibrating silicate matrices, in contrast to scapolite, which causes systematic Cl overestimation of up to 13%.
Sebastian Stumpf   +7 more
wiley   +1 more source

Radiographic Intraradicular Reduction of a Calcium Silicate–Based Sealer: Case Reports

open access: yesInternational Endodontic Journal, EarlyView.
ABSTRACT Aim To document radiographically observable intraradicular reduction of AH Plus Bioceramic, a premixed calcium silicate–based sealer (CSBS), during clinical follow‐up after nonsurgical root canal retreatment. Summary Four cases of nonsurgical root canal retreatment performed with a premixed CSBS using a single‐cone obturation technique are ...
Damien Savoure   +3 more
wiley   +1 more source

Solid-State Nuclear Magnetic Resonance Investigation on Crystallization of Xonotlite from Poorly-Crystalline Calcium Silicate Hydrate (C-S-H)

open access: yes
1 Introduction 2 29^Si MAS NMR Spectroscopy of Poorly-Crystalline Calcium Silicate Hydrates (C-S-H) 3 Formation Mechanism of Xonotlite from Poorly-Crystalline Calcium Silicate Hydrate (C-S-H) 4 Influence of Siliceous Materials on Crystallization of ...
野間, 弘昭   +2 more
core  

Outcome of Calcium Silicate Sealer‐Based Obturation in Root Canal Retreatment: A CBCT‐Based Prospective Cohort Study

open access: yesInternational Endodontic Journal, EarlyView.
ABSTRACT Background Calcium silicate sealers (CSS) have become the dominant approach to root canal obturation in many specialist practices, yet evidence on their performance in nonsurgical retreatment is sparse and CBCT‐based assessment remains uncommon.
Ahmad Aldowaisan   +6 more
wiley   +1 more source

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