Results 151 to 160 of about 9,444 (222)

Marine phosphorus and atmospheric oxygen were coupled during the Great Oxidation Event. [PDF]

Nat Commun
Dodd MS, Li C, Gu H, Zhang Z, Hou M, Sadekov A, Rosière CA, Pirajno F, Alcott L, Ossa FO, Mills BJW, Bekker A.   +11 more
europepmc   +1 more source

Six Ca‐Mg‐Fe Carbonate Reference Materials for In Situ Measurement of Oxygen and Carbon Isotope Ratios

Geostandards and Geoanalytical Research, Volume 50, Issue 1, Page 155-179, March 2026.
Key Points Six new Ca‐Mg‐Fe carbonate reference materials are available to the global geochemical community for calibrating oxygen and carbon isotope ratios by SIMS. Significant compositional matrix effects were observed in the dolomite‐ankerite and magnesite‐siderite series during SIMS analysis. Compositional matrix effects correlate with Fe variation.
Maria Rosa Scicchitano, Chris Harris, Julie Luyt, Andreas Pack, Tommaso di Rocco, Torsten Vennemann, Franziska D.H. Wilke, Anja M. Schleicher, Johannes Glodny, Kimberly T. Tait, Simon Philippo   +10 more
wiley   +1 more source

Effects of calcined dolomite on the fatigue performance of asphalt concrete affected by water with variable acidity. [PDF]

Sci Rep
Mehdinazar M, Hamedi GH, Asadi AH.
europepmc   +1 more source

PhotoBiology Station for Plant–Light Interactions Studies in Field Conditions

Journal of Agronomy and Crop Science, Volume 212, Issue 2, March 2026.
ABSTRACT Light is a primary source of energy for photosynthesis and a fundamental signal that governs plant morphology and growth dynamics through well‐orchestrated signalling pathways. In field conditions, light intensity and quality, as well as other variables, constantly change throughout the day.
Yan Lucas Leite, Luana Gabriela Gallert, Gabriel Dias Gomes, Lucas Gaia Romagnoli, Maria Luísa Matos da Silva, Thaís Millena Marques Couto, Wellington Ferreira Campos   +6 more
wiley   +1 more source

Synergetic static and radiation shielding characteristics of non-conventional concrete mixtures. [PDF]

Sci Rep
Amin HKA, El-Samrah MG, Amer NH, Tawfic AF, Ali MAEM.   +4 more
europepmc   +1 more source

The Stability of Gyrolite and Influence of Fe(III)

Journal of the American Ceramic Society, Volume 109, Issue 3, March 2026.
ABSTRACT Gyrolite (Ca4Si6O15(OH)2·4H2O) is a crystalline calcium silicate hydrate which forms hydrothermally and is primarily used as an adsorbent for wastewater treatment. The stability of gyrolite is poorly understood, as well as the potential impact of Fe, which can be present as an impurity in the raw materials used.
Serena Mingione, Egle Bobinaite, Tadas Dambrauskas, Frank Winnefeld, Barbara Lothenbach   +4 more
wiley   +1 more source

Stromatolites and pulsed oxygenation events in the Mesoproterozoic Longjiayuan formation of western Henan: evidence for life-environment co-evolution. [PDF]

Sci Rep
Li Q, Zheng D, Sun F.
europepmc   +1 more source

Apatite in Bennu samples indicates multiple stages of aqueous alteration

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 504-521, March 2026.
Abstract Calcium phosphates are ubiquitous in planetary materials, including samples returned from asteroid Bennu by the OSIRIS‐REx mission. We characterized apatite [Ca5(PO4)3(F,Cl,OH)] grains in Bennu samples by scanning electron microscopy, electron microprobe analysis, and transmission electron microscopy to investigate their compositions, mineral ...
Laura B. Seifert, T. M. Erickson, L. P. Keller, J. J. Barnes, K. Thomas‐Keprta, L. Le, J. Gorce, Z. Rahman, T. J. Zega, H. C. Connolly Jr, D. S. Lauretta   +10 more
wiley   +1 more source

Experimental Observation of a Calcium Silicon Double Carbonate

Angewandte Chemie, Volume 138, Issue 9, 23 February 2026.
High‐pressure and ‐temperature reactions between Ca5(Si2O7)(CO3)2 tilleyite and CO2 carbon dioxide yield the first experimental evidence of the double carbonate Ca2Si(CO3)4 and a new Ca2(C4O10) phase containing tetrahedral [CO4] units. These findings reveal unexpected carbonate chemistry and highlight pathways for carbon incorporation under mantle ...
Benedito Donizeti Botan‐Neto, David Santamaria‐Perez, Julia Bungarten, Lkhamsuren Bayarjargal, Björn Winkler, Alberto Otero‐de‐la‐Roza, Bihan Wang   +6 more
wiley   +2 more sources

Origin of Mg-rich clay minerals in the first member of Maokou Formation in the middle Permian in the Central and Southern Sichuan Basin (China) and their implications on supergene and hypogene fluid regimes. [PDF]

PLoS One
Tan W, Wang X, Niu P, Jin X, Zhao L, Wang Y, Li Y, Zhang Y.   +7 more
europepmc   +1 more source