Results 111 to 120 of about 6,429 (270)

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

The 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, Gabriela C. Silva, Isabel P. Silva, Frederico M. Penha, Sônia D. F. Rocha   +4 more
wiley   +1 more source

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

ChemSusChem, 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, Jón Jónasson, Earl Goetheer, Ruud Kortlever   +3 more
wiley   +1 more source

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

Deep 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, Yikang Cheng, Guanglei Cai, Yuan Gao, Jianwei Tian, Mingzhong Gao   +5 more
wiley   +1 more source

Naples Yellow Revisited: Insights into Trades and Use in 17th-Century Sicily from the Macro X-ray Fluorescence Scanning of Matthias Stomer’s ‘The Mocking of Christ’

Heritage
In a recent non-destructive analytical campaign at Museo Civico, Castello Ursino, in Catania, Italy, several paintings in the permanent collection were investigated by MA-XRF scanning, with a special focus on Matthias Stomer’s production.
Michela Botticelli, Costanza Miliani, Eva Luna Ravan, Claudia Caliri, Francesco Paolo Romano   +4 more
doaj   +1 more source

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

ENERGY &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, Thomas R. Dore, Hector J. Lancaster, Christopher A. Howard, Thomas S. Miller   +4 more
wiley   +1 more source

Synthesis of Carboxylic Cellulose Nanocrystals From Yellow Thatching Grass (Hyparrhenia filipendula) via Citric Acid Hydrolysis

Energy Science &Engineering, EarlyView.
Fractionation of yellow thatching grass using sodium hydroxide and deep eutectic solvent Carboxylated Cellulose nanocrystals (CNCs) were successfully synthesized via hydrolysis with 80 wt% citric acid at 120°C for 4 h Variations in CNC characteristics were observed based on the fractionation method used ABSTRACT Grass is an abundant and renewable ...
Fildah Ayaa, Michael Lubwama, Samuel Ayodele Iwarere, Michael Olawale Daramola, John Baptist Kirabira   +4 more
wiley   +1 more source

Geological Storage of CO2 and H2: A Bibliometric Synthesis of General and Laboratory‐Scale Research Evolution

Greenhouse Gases: Science and Technology, EarlyView.
ABSTRACT Underground gas storage is a cornerstone technology for addressing climate change and advancing the clean energy transition. By managing greenhouse gas emissions and enhancing energy system resilience, it supports global sustainability goals.
Sara Roces, Jhon Caicedo‐Potosí, Timea Kovács, Berta Ordóñez‐Casado, Sergio Llana‐Fúnez, Edgar Berrezueta   +5 more
wiley   +1 more source

New Approach Methodologies (NAMs) in Alternative Methods: A Comparative Cytotoxicity Analysis of Nanostructured Hydroxyapatite in Adipose Stem Cells Spheroids

Journal of Applied Toxicology, EarlyView.
ABSTRACT Toxicological assessment is essential in NP approval for health and medical applications. Although 2D cell culture has been widely used, 3D models, especially spheroids, provide better predictive value for toxicological risk assessments since they replicate complex cellular interactions more accurately.
Bianca Montenegro, Rosângela Mayer Gonçalves, Marcelle Gomes Pegurier, Isabelle Amorim, Alexandre Malta Rossi, Leandra Santos Baptista   +5 more
wiley   +1 more source

X-ray fluorescence (XRF) on painted heritage objects: a review using topic modeling

Heritage Science
This review presents the computational method of topic modeling to identify core topics and time trends in research on X-ray fluorescence (XRF) and its application to cultural heritage.
Astrid Harth
doaj   +1 more source

Holocene climate oscillations, seismotectonic events and human–environmental interactions reconstructed from the Giannades palaeolake on Corfu (Eastern Mediterranean, Greece)

Journal of Quaternary Science, EarlyView.
ABSTRACT The Mediterranean is particularly sensitive to rapid climate changes (RCCs) during the Holocene. An increasing number of natural climate archives revealed that socio‐economic developments were influenced by such RCCs since the Palaeolithic. However, multi‐millennial and high‐resolution archives are still rare and often located in mountainous ...
Esra Reichert, Peter Fischer, Bernd Zolitschka, Tina Georg, Lea Obrocki, Denis Scholz, Katja Sporn, Andreas Vött   +7 more
wiley   +1 more source