Results 131 to 140 of about 61,474 (312)

Coccolithophore particulate inorganic and organic carbon ratios: An evaluation of acid decalcification methods

Limnology and Oceanography: Methods, EarlyView.
Abstract Accurate direct measurements of coccolithophore particulate inorganic and organic carbon ratios (PIC/POC) are crucial for understanding the physiology and role these microbes play in global ocean carbon flux. Direct measurements of POC are commonly obtained by acid fuming or applying acid directly to filters to dissolve PIC (CaCO3) prior to CN
Madison B. Cox, Robert F. Whitehead, Alison R. Taylor   +2 more
wiley   +1 more source

Formation process and thermodynamic poperties of calcite

, 2007
The fast mixing of aqueous solutions of calcium chloride and sodium carbonate resulted in crystalline forms of vaterite and calcite under vigorous stirring. Then, the vaterite was transformed to pure calcite within about 180 min.
Shi Zuo-Yi, Qin Mei, Nan Zhao-Dong, Hou Wan-Guo, Tan Zhi-Cheng   +4 more
core  

Electrochemical Monitoring of Steel Corrosion in NS4 Solution Under Cathodic Protection Environment: Insights of Electrochemical Impedance Spectroscopy

Materials and Corrosion, EarlyView.
Electrochemical impedance spectroscopy (EIS) monitored corrosion on mild steel under cathodic protection in soil‐like conditions. CP reduced corrosion from 410 to 7 µm/yr, shifting the mechanism from mixed activation–diffusion to activation‐controlled, enabling protective calcareous and oxide film formation.
Mandlenkosi George Robert Mahlobo, Tumelo Wordsworth Poloko Seadira, Major Melusi Mabuza, Peter Apata Olubambi   +3 more
wiley   +1 more source

Anaerobic Corrosion Phenomena of Cast Iron and Copper in Artificial Groundwater at Elevated Temperature

Materials and Corrosion, EarlyView.
This study examines corrosion of copper and cast iron as candidate canister materials for high‐level radioactive waste disposal in contact with bentonite suspension. The influence of three electrolyte compositions on corrosion behavior under repository‐relevant conditions is assessed.
Louisa Panjiyar, Martin Ende, Christiane Stephan‐Scherb   +2 more
wiley   +1 more source

Alkalinity control in sludge propels the conversion of concrete slurry waste into micro- and nano-sized biogenic CaCO3

Water Science and Technology
The utilization of Bacillus sp. for the production of bio-CaCO3 in concrete crack repair and strength enhancement has attracted considerable attention.
Jinbo Zhao, Jiacheng Feng, Yifan Du, Zhiyang Yan, Xiaoguang Li, Jinyi Qin, Ming Su, Min Yang   +7 more
doaj   +1 more source

Modeling Biocemented Sands: Hypoplastic Model for MICP‐Based Ground Improvement

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Bio‐cementation offers a sustainable and low‐carbon alternative to conventional ground improvement methods, aligning with the growing demand for green geotechnical solutions. To enable reliable numerical simulation of bio‐cemented soil behavior in engineering applications, advanced constitutive models are required to account for the effects of
Merita Tafili, Hossam Abdellatif, Nazanin Irani, Torsten Wichtmann   +3 more
wiley   +1 more source

Fabrication of a Functional Composite Material Using Waste Concrete Powder and Polyethylene

Polymer Composites, EarlyView.
Preparation and experimental verification of functional composite materials using waste concrete powder and polyethylene. ABSTRACT This study investigated the fabrication of a functional composite material using waste concrete powder (WCP), which is a novel method for effectively utilizing waste concrete.
Yasuyuki Kanda, Tsuguri Kusumoto
wiley   +1 more source

Comparative Assessment of Shell Structural, Mechanical, and Elemental Properties in Adult Acorn Barnacles

Diversity
Balanomorph (acorn) barnacles are found throughout the world’s coastal oceans, and their success is dependent on a hard, mineralized, outer shell. Although macro-scale morphology of barnacle shells has been studied extensively, relatively little is known
Jazmine Shaw, Yeram Kang, Callie Triano, Corin J. Hoppe, Nick Aldred, Rebecca A. Metzler, Gary H. Dickinson   +6 more
doaj   +1 more source

Performance of Glass Fiber Composites With Plastic‐Waste Pyrolysis Char as Filler

Polymer Composites, EarlyView.
Valorisation of mixed plastic waste into carbonaceous char via pyrolysis, its integration as a microfiller in epoxy/E‐glass (GFRP) laminates, and characterisation to assess composite performance as a function of filler loading. ABSTRACT Plastic pyrolysis offers circular solutions for mixed plastic waste but leaves a carbonaceous char that is often ...
Jerome Anokwu, Andrew Clark, Natalie Ferry, Levingshan Augusthus‐Nelson   +3 more
wiley   +1 more source

Superplastic nanofibrous slip zones control seismogenic fault friction

, 2014
Understanding the internal mechanisms controlling fault friction is crucial for understanding seismogenic slip on active faults. Displacement in such fault zones is frequently localized on highly reflective (mirrorlike) slip surfaces, coated with thin ...
Structural geology and EM, Plümper, Oliver, Sub Biomolecular Imaging, ISES: Frictional behaviour of calcite-rich fault rocks & implications for seismicity in carbonate terrains, Spiers, Christopher J., Verberne, Berend A., de Winter, D.A. Matthijs, Experimental rock deformation, Sub Cryo - EM   +8 more
core   +1 more source