Results 61 to 70 of about 3,151 (181)

Making vertebrate fossil radiocarbon dates more useful for global scientific research

open access: yesJournal of Quaternary Science, Volume 40, Issue 8, Page 1309-1335, November 2025.
ABSTRACT Radiocarbon dating of bones is essential for reconstructing timelines of species' occurrences, domestication, extinction, migrations, and interactions with Quaternary environments. Many studies compile these chronologies at continental to global scales by aggregating radiocarbon dates from various sources, often balancing data quantity and ...
Salvador Herrando‐Pérez   +1 more
wiley   +1 more source

The Application of Headspace: Solid-Phase Microextraction (HS-SPME) Coupled with Gas Chromatography/Mass Spectrometry (GC/MS) for the Characterization of Polymers [PDF]

open access: yes, 2017
Solid-Phase Microextraction (SPME) is a very simple and efficient, solventless sample preparation method, invented by Pawliszyn and coworkers at the University of Waterloo (Canada) in 1989.
Kusch, Peter (Dr.)
core  

Nanoporous Redox‐Active Miktoarm Block Copolymer Templates

open access: yesJournal of Polymer Science, Volume 63, Issue 21, Page 4649-4660, 1 November 2025.
Soft‐etchable miktoarm block copolymers based on polystyrene and polylactide (PLA) are synthesized by a combination of living anionic polymerization, end group modification, and ring opening polymerization. The impact of solvent vapor annealing and selective etching of the PLA phase is demonstrated for nanoporous thin film template generation ...
Lukas Stein   +9 more
wiley   +1 more source

Polymer protected gold nanoparticles: synthesis, characterization and application in catalysis [PDF]

open access: yes, 2018
This review discusses the stabilization of gold nanoparticles (AuNPs) by nonionic, anionic, cationic and amphoteric polymers. The protocols used for synthesis of AuNPs in aqueous and organic solvents are described. Size, shape and morphology of AuNPs are
Baygazieva, E. K.   +5 more
core   +1 more source

Síntese e caracterização de copolímeros reticulados à base de estireno, divinilbenzeno e metacrilato de metila com propriedades magnéticas Synthesis and characterization of crosslinked copolymers based on syrene, divinylbenzene and methyl methacrylate with magnetic properties

open access: yesPolímeros, 2013
Neste trabalho, foram sintetizados copolímeros à base de estireno (STY), divinilbenzeno (DVB) e metacrilato de metila (MMA) com propriedades magnéticas pela técnica de polimerização em suspensão.
Flavio S. Souza   +5 more
doaj  

Wildfires Change Summertime Dissolved Organic Matter in Boreal Headwater Streams

open access: yesJournal of Geophysical Research: Biogeosciences, Volume 130, Issue 11, November 2025.
Abstract Boreal forests export large amounts of terrestrial carbon into downstream waters as dissolved organic material (DOM), but how increasing wildfire frequency affects this flux remains understudied. If more DOM is exported from land into water after wildfire and/or this DOM is more readily transformed by microbes, the net loss of carbon from ...
Erin Matula   +5 more
wiley   +1 more source

Formulated plastic separators for soluble electrode cells [PDF]

open access: yes, 1979
The fabrication and milling of membranes comprising a hydrochloric acid-insoluble sheet of a mixture of a rubber and a powdered ion transport material are described. The sheet can be present as a coating upon a flexible and porous substrate.
Sheibley, D. W.
core   +1 more source

Reactive precursor particles as synthetic platform for the generation of functional nanoparticles, nanogels, and microgels [PDF]

open access: yes, 2019
Precise control of the chemical functionality of polymer nanoparticles is a key requirement in tailoring their (dynamic) colloidal properties toward advanced applications.
Gruber, Alexandra   +2 more
core   +1 more source

How to Select Each Component of CO2 Electrolyzers

open access: yesExploration, Volume 5, Issue 5, October 2025.
This review discusses how each component of a CO2 electrolyzer, such as membranes, electrodes, electrolytes, flow channels, and inlet CO2 affects system performance. By analyzing recent advances and design strategies, it highlights how optimized component selection can improve efficiency and product selectivity.
Gyeong Ho Han   +5 more
wiley   +1 more source

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