Results 81 to 90 of about 79,236 (199)

Polyaniline as a dual flame retardant and electrostatic dissipative additive in polyethylene nanocomposites

Journal of Vinyl and Additive Technology, Volume 31, Issue 2, Page 339-355, March 2025.
Effecft of co‐doping polyaniline with phosphoric acid and phytic acid on the heat release rate of polyethylene. Abstract Polyolefins, such as polyethylene (PE), are highly flammable and electrically insulative, limiting their applicability. The study explored the flame‐retardancy and electrical conductivity of PE/polyaniline (PE/PANI) nanocomposites ...
Akeem Adisa, Joseph K. O. Asante, Vincent O. Ojijo, António B. Mapossa, Washington Mhike   +4 more
wiley   +1 more source

Chasing the perfida Albione: Anglo‐Italian productivity gap in the late 1930s

The Economic History Review, EarlyView.
Abstract This paper presents new estimates of Anglo‐Italian labour productivity levels in manufacturing in the late 1930s, derived using the standard single‐deflation approach. The findings confirm a substantial productivity gap between Italy and the United Kingdom at the aggregate level, alongside pronounced intersectoral heterogeneity.
Tancredi Salamone
wiley   +1 more source

Do Political Connections Seek Green Rent? Only When Safe

Financial Review, EarlyView.
ABSTRACT This study examines how and under what conditions political connections shape firms’ responses to environmental policies. Exploiting the staggered rollout of China's Low‐Carbon City Pilot (LCCP) policy, we find that firms connected to higher‐level governments engage in greater rent‐seeking under this weakly enforced policy.
Tianxi Wang, Ruoran Zhao
wiley   +1 more source

FROM SCANDINAVIA TO THE LEVANT: THE LATE BRONZE AGE METAL TRADE AND NURAGIC SARDINIA

Oxford Journal of Archaeology, EarlyView.
Summary A growing body of evidence suggests that Nuragic Sardinia played a role, as yet poorly understood, in the metal trade between Scandinavia, Atlantic Europe, and the Mediterranean during the Bronze Age. Provenance studies based on lead isotope and chemical analyses of copper‐based – and to a minor extent lead – artefacts from both continental ...
Serena Sabatini
wiley   +1 more source

Recent Advances in Boron Removal From Geothermal Waters: A Review

Water and Environment Journal, EarlyView.
This review provides a comprehensive overview of boron removal technologies from geothermal fluids and highlights the limitations of conventional treatment methods. Ion exchange, hybrid processes and membrane filtration are identified as the most dominant approaches in recent studies.
Saadet Acar Can, Hasan Koseoglu
wiley   +1 more source

Maple v.18 software in the learning of the subject Mathematics II in students of the Faculty of Mining, Geology and Metallurgy Engineering, semester 2024-I-Unasam- Huaraz, 2024 [El software Maple v.18 en el aprendizaje de la asignatura Matemáticas II en estudiantes de la Facultad de Ingeniería de Minas, Geología y Metalurgia, semestre 2024-I-Unasam- Huaraz, 2024]

Journal of Global Education Sciences
Maple V.18 software is a teaching resource that enhances mathematics learning for university students. The objective of this research was to determine the influence of Maple V.18 software on the learning of the Mathematics II course among students in the Faculty of Mining, Geology, and Metallurgy Engineering at UNASAM during the 2024-I semester.
Jonhson Valderrama Arteaga, César Gonzales Chiclayo, María Medina Gutierrez, Julie Espinoza Castromonte, Alexander Pacheco Castillo, Lorenzo Atoche Cáceres, Orlando Javier Rosas   +6 more
openaire   +1 more source

Particle Analysis and Mechanical–Thermal Properties of Bio‐Derived and Commercial CaCO3 Reinforced Laboratory‐Reprocessed Polypropylene Composites

SPE Polymers, Volume 7, Issue 4, October 2026.
Bio‐derived and commercial CaCO3 reinforced laboratory‐reprocessed polypropylene composites were fabricated and characterized, demonstrating improved stiffness and thermal stability while maintaining acceptable processability. ABSTRACT This study investigates laboratory‐reprocessed polypropylene (rPP)‐based composites reinforced with calcium carbonate (
Eba Mala Maldaye, Isiaka Oluwole Oladele, Benjamin Omotayo Adewuyi, Paul Albrecht, Volker Schöppner   +4 more
wiley   +1 more source

A Stochastic Formulation for the Dig-Limit Definition Problem in Short-Term Mine Planning Under Grade Uncertainty

Mathematics
Uncertainty in short-term grade estimations can significantly affect destination policies and dig-limit definitions in open-pit mining. However, most dig-limit techniques still rely on deterministic methods and manual procedures.
Gonzalo Nelis, Constanza Aguilera, Arleth Campos, Fabián Manríquez, Rodrigo Estay, Enrique Jelvez, Felipe Muñoz   +6 more
doaj   +1 more source

A Multi‐Analytical Approach for the Compositional Characterization and Chronological Discrimination of Benin (Nigeria) Metal Sculptures

Archaeometry, Volume 68, Issue 5, Page 1022-1036, October 2026.
ABSTRACT This study presents a multi‐analytical archaeometric approach for the compositional characterization and chronological discrimination of Benin metal sculptures in relation to the 1897 Punitive Expedition. The methodology integrates elemental composition (XRF and ICP), stable lead isotope ratios (MC‐ICP‐MS) for alloy system characterization ...
I. Torraba, D. A. Ahumada, H. Bagán, A. Tarancón, S. Eisenhofer, J. F. García   +5 more
wiley   +1 more source

Early Bronze Age Copper Circulation in the Guadalentín and Segura Valleys (SE Spain)

Archaeometry, Volume 68, Issue 5, Page 1139-1151, October 2026.
ABSTRACT Identifying the sources of copper used in Early Bronze Age metalwork from south‐east Spain is key to resolving a long‐running debate concerning centralized control, or lack thereof, over El Argar society's economic organisation. This study provides the first substantial integrated programme of EDXRF and MC‐ICP‐MS analyses for copper‐base ...
Dirk Brandherm, Ignacio Montero‐Ruiz
wiley   +1 more source