Results 71 to 80 of about 19,299 (229)

Determining Diffusion Coefficients in Polymer Electrolyte Membranes With Lab Based Micro X‐Ray Fluorescence Analysis: A Proof of Concept

X-Ray Spectrometry, EarlyView.
ABSTRACT The diffusion of metal ions in polymer electrolyte membranes is an important parameter for aging and capacity loss in electrochemical cells. Here, the diffusion coefficients of vanadium ions in Nafion membranes are studied. These are important to describe transportation of the ions through the membrane separator in vanadium redox flow ...
Frithjof Mähler, Sven Hampel, Ursula E. A. Fittschen   +2 more
wiley   +1 more source

Polarographic study of cadmium 5-hydroxy 2-(hydroxymethyl) 4H-pyran-4-one complex [PDF]

A polarographic study was performed on the products formed in the interaction of cadmium (II) with a 5-hydroxy 2-(hydroxymethyl) 4H-Pyran-4-one, using varying conditions of pH, supporting electrolytes, and concentrations.
Daniels, Robert C., Wilson, Ray F.
core   +1 more source

Silicon Sheets By Redox Assisted Chemical Exfoliation

, 2013
In this paper, we report the direct chemical synthesis of silicon sheets in gram-scale quantities by chemical exfoliation of pre-processed calcium di-silicide (CaSi2).
Ali, Mustapha Ait, Aufray, Bernard, Bendounan, Azzedine, Chaudanson, Damien, Dujardin, Gérald, Enriquez, Hanna, Foy, Eddy, Jamgotchian, Haik, Kara, Abdelkader, Lachgar, Abdessadek, Mayne, Andrew J., Nitshe, Serge, Oughaddou, Hamid, Silly, Mathieu G., Sirotti, Fausto, Tchalala, Mohamed Rachid, Vega, Enrique, Yagoubi, Said   +17 more
core   +3 more sources

South Africa: The Ambiguities of a Middle Power

Global Policy, EarlyView.
ABSTRACT South Africa represents an interesting species of a middle power. This derives from its inherited economic muscle as Africa's powerhouse and the liberation struggle against apartheid, both of which have shaped its democratic transition. The traditions of liberation and democracy, in turn, have profoundly influenced how South Africa has ...
Garth L. le Pere
wiley   +1 more source

Base and additive free click chemistry strategy to accomplish the synthesis of amalgamated pyrazolo-triazole heterocyclic scaffolds and their molecular docking study

Current Chemistry Letters
The current work involves the synthesis of amalgamated heterocyclic scaffolds embracing pyrazolone and triazole nuclei. The suggested methodology leads to streaming in the targeted synthesis in a multicomponent reaction manner resulting in 91% yield of the structural motifs.
Ashok Waskle, Dharamsingh Waskle, Twinkle Solanki, Prakash Barfa, Pratibha Sharma, Ashok Kumar   +5 more
openaire   +1 more source

When the Former CEO Acts as Board Chair: Does This Matter to Debt Policy and Risk of Default?

Abacus, EarlyView.
This paper scrutinizes the interconnections between debt capital raising, firm risk of default, and the presence of a former CEO who now serves as a board chairperson, referred to as the Chair‐Former‐CEO (CFC). Employing a sample of the largest non‐financial firms within the US S&P 100 from 2002 to 2018, our results reveal that, when compared to their ...
Vu Quang Trinh, Aly Salama, Basil Al‐Najjar   +2 more
wiley   +1 more source

Living by the lake: Plant food diversity in a prehistoric lake‐dwelling community in the Republic of North Macedonia

Archaeometry, EarlyView.
Abstract This paper explores the relationship between wetland ecosystems and prehistoric lakeshore settlements within the Lake Ohrid basin (a biodiversity hotspot) by considering plant food systems at Ploča Mičov Grad, North Macedonia. The mid‐fifth millennium (c.4555–4373 to 4437–4241 cal BCE) waterlogged assemblage contained a diverse spectrum of ...
Amy Holguin, Michael Charles, Ferran Antolín, Rachel Ballantyne, Müge Ergun, Albert Hafner, Stefanie Jacomet, André F. Lotter, Goce Naumov, Johannes Reich, Raül Soteras, Elizabeth Stroud, Willy Tinner, Rachel Wood, Amy Bogaard   +14 more
wiley   +1 more source

Navigating the Flames: Comparative Analysis of Cremation Practices in the Roman and Early Medieval Periods at Gbely‐Kojatín (SK) and Přítluky (CZ)

Archaeometry, EarlyView.
ABSTRACT Cremation became the dominant funerary practice in the Middle Danube Region during the Roman Period (RP) (1st–4th century) and reappeared in the Early Medieval Ages (EMA) (6th/7th–8th century). This study aims to reconstruct differences in cremation conditions from the Gbely‐Kojatín site (Slovakia, RP and EMA) and the Přítluky site (Czech ...
Katarína Hladíková, Anna Pankowská, Marek Hladík, Pavla Kučerová, Rastislav Milovský   +4 more
wiley   +1 more source

The Role of Chatbots in Enquiry‐Based Learning for Oral Health Students—An Exploratory Study

European Journal of Dental Education, EarlyView.
ABSTRACT Objective This study explores the reliability of four Chatbots in enquiry‐based learning. Four Chatbots, namely Microsoft Copilot, Google Gemini, ChatGPT 3.5 and Perplexity, were used to answer and generate questions in four specific subject areas.
Rohini Khareedi, Daniel Fernandez
wiley   +1 more source

Environmental Implications of the Health Care Service Sector [PDF]

This report analyzes the environmental effects associated with activities undertaken and influenced by the health care service sector. It is one part of a larger study to better understand the environmental effects of service sector activities and the ...
Davies, J. Clarence, Lowe, Adam
core