Results 111 to 120 of about 103,977 (217)

Chemical characterization via pXRF of Early Iron Age pottery from SW Iberia

open access: yesUISPP Journal, 2019
The main aim of this paper is to present the results of archaeometric analyses of Tartessian pottery recently undertaken in the Lower Guadalquivir region (western Andalusia, Spain).
Michał Krueger, Dirk Brandherm
doaj   +1 more source

Optimization of a reactor for biostimulant production with emphasis on the economic aspects of hydrolysis

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract Biostimulants are increasingly used in agriculture to promote plant growth, improve stress tolerance, and support sustainable farming practices. One common method of production is chemical hydrolysis of protein‐rich waste, such as tannery by‐products, offering an economical and eco‐friendly alternative to conventional raw materials.
Karel Kolomazník   +3 more
wiley   +1 more source

Precipitation of niobic acid from potassium niobate in sulphuric acid solution: A route to niobium oxide

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Graphical abstract illustrating the niobic acid precipitation process applied and the product obtained. Abstract This study investigates the precipitation of niobic acid (Nb2O5.nH2O) from potassium niobate solution with addition of sulphuric acid, and its subsequent thermal conversion into niobium oxide (Nb2O5). Thermodynamic modelling with PHREEQC and
Cássia R. Souza   +4 more
wiley   +1 more source

The Effect of Electrolyte pH and Impurities on the Stability of Electrolytic Bicarbonate Conversion

open access: yesChemSusChem, Volume 18, Issue 6, March 15, 2025.
The performance of bicarbonate electrolysis is largely controlled by the electrolyte inlet pH, the distance between the membrane and electrode, and the impurities present in the electrolyte. By complexing trace metal ions with ethylenediaminetetraacetic acid (EDTA), stability can significantly be improved and longer term operation can be achieved ...
Iris Burgers   +3 more
wiley   +1 more source

RILIEVO E VISUALIZZAZIONE 3D DI DATI DIAGNOSTICI CON STRUMENTI OPEN SOURCE IL CASO DELLA TOMBA DELLA SCIMMIA A CHIUSI

open access: yesArcheomatica, 2014
This paper aims to demonstrate the usefulness of digital reconstructions in the visualization and interpretation of analytical data obtained in science conservation projects.
Cristina Giancristofaro   +2 more
doaj  

GEOCHEMICAL CHARACTERISATION OF SOIL USING XRF: IMPLICATION FOR GEOTECHNICAL PROPERTIES

open access: yese-Zbornik. Elektronički Zbornik Radova Građevinskog Fakulteta
This study investigates the geochemical and geotechnical properties of soils from Uwelu, Benin City, Nigeria (6.3861°N, 5.5827°E, 107 m altitude), to assess their engineering relevance.
David Idiata   +2 more
doaj   +1 more source

Performance of portable XRF and micro-XRF on carbonates

open access: yesGeophysical Research Abstracts, 2016
Variations in elemental abundances in various carbonate archives offer a wealth of paleoenvironmental proxy information. State of the art portable handheld X-Ray Fluorescence (pXRF) and laboratory micro X-Ray Fluorescence (μXRF) instruments provide a relatively inexpensive and fast way of acquiring elemental composition data.
De Winter, Niels   +3 more
openaire   +2 more sources

Corrosion effect of hydrochloric acid on the granite: Insights from electrical conductivity, mineral composition, and tensile behavior

open access: yesDeep Underground Science and Engineering, EarlyView.
The evolution of electrical conductivity, mineral composition, and tensile behavior such as peak strength, average stiffness, and the energy evolution of the granite specimen under different HCl conditions are studied, analyzed as well as quantified, and investigated, respectively.
Yanan Gao   +5 more
wiley   +1 more source

Synthetic Engineering of Manganese Oxide–Carbon Nanocomposites for Maximized Metal Utilization in Supercapacitors

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A one‐pot metal–ammonia synthesis enables uniform Mn2O3 nanoparticle deposition on activated carbon, yielding composites with excellent electrochemical performance in supercapacitors. The method maximizes manganese utilization, eliminates toxic solvents, and achieves 34% of the theoretical maximum capacitance, significantly outperforming existing Mn–C ...
Katrina Mazloomian   +4 more
wiley   +1 more source

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