Results 51 to 60 of about 17,155 (186)
Aragonite dissolution protects calcite at the seafloor. [PDF]
, 2022 peer reviewedIn the open ocean, calcium carbonates are mainly found in two mineral forms. Calcite, the least soluble, is widespread at the seafloor, while aragonite, the more soluble, is rarely preserved in marine sediments.
Sulpis, Olivier +6 more
core +2 more sources
Preparation of mono-dispersed aragonite microspheres via a carbonation crystallization pathway
, 2009 Monodispersed calcium carbonate microspheres were prepared by carbonating a calcium acetate aqueous solution with CO gas at a high pressure of 40 bar and a high temperature of 80 degrees C after 60 minutes of reaction.
Li, HQ +3 more
core +1 more source
Adverse effects of ocean acidification on early development of squid (Doryteuthis pealeii) [PDF]
, 2013 This study was supported by a WHOI Student Summer Fellowship and WHOI-MIT Joint Program, the Penzance Endowed Fund, the John E. and Anne W. Sawyer Endowed Fund and NSF Research Grant No. EF-1220034. Additional support came from NSF OCE 1041106 to ALC and
Maxwell B. Kaplan +19 more
core +2 more sources
Communications Earth & EnvironmentSpeleothem trace element records can provide seasonal resolution climate reconstructions, but the interpretation can be challenging. Aragonite samples are understudied compared to calcite samples, despite that aragonite has 10x higher uranium ...
Jasper A. Wassenburg +9 more
doaj +1 more source
Global Challenges, 2023 The interaction between rare earth element (REE)‐rich (La, Pr, Nd, Dy) aqueous solutions, dolomite (CaMg(CO3)2), and aragonite (CaCO3) at low temperature hydrothermal conditions (25–220 °C) is studied.
Adrienn Maria Szucs +4 more
doaj +1 more source
Optimizing feather hydrolysate via machine learning for microbial recycling of waste concrete fines
Journal of Chemical Technology &Biotechnology, EarlyView.Abstract BACKGROUND The concrete industry faces significant challenges from CO2 emissions and the disposal of waste concrete fines (WCF). Microbially induced calcite precipitation (MICP) can bind WCF into bioconcrete, but the high cost of commercial culture media hinders its application.
Henrietta Ottová +5 more
wiley +1 more source
Journal of Quaternary Science, EarlyView.ABSTRACT Stable isotope analyses of freshwater mollusc carbonate can record environmental conditions at the time of mineralisation, yet this technique remains underused in British Middle Pleistocene fluvial sequences, despite the abundance of fossil shell material in these deposits.
Jennifer E. Sherriff +4 more
wiley +1 more source
Journal of Raman Spectroscopy, EarlyView.We present the Carbonate Raman Processing and Plotting tool (CaRPP), designed to perform peak‐fitting and visualization on two‐dimensional Raman maps of calcium carbonate specimens. Users begin by providing a raw Raman data file and then interactively use the application to perform peak‐fitting, masking, and 2‐D image generation.
Thomas M. DeCarlo
wiley +1 more source
Environmental Toxicology, EarlyView.ABSTRACT Natural radionuclides in cement and gypsum production materials pose significant risks of occupational radiation exposure that are not well documented in Iraqi Kurdistan. This study quantifies alpha and gamma radiation levels from naturally occurring radioactive materials, specifically 222Rn, 238U, 232Th, and 40K, in cement and gypsum samples ...
Adil M. Hussien +4 more
wiley +1 more source
A simple periodic peptide derived from Pinctada fucata Pif80 protein induces aragonite nucleation in magnesium absence [PDF]
Pif80 protein is associated with nacre formation in the Akoya pearl oyster. The influence of Pif2, a 32-mer peptide derived from Pif80, on calcium carbonate polymorphism, crystal orientation, morphology, and the induction of aragonite was investigated ...
Amir, Berman +2 more
core +1 more source