Results 71 to 80 of about 4,516,287 (245)

Carbon stable isotope analysis of cereal remains as a way to reconstruct water availability: preliminary results [PDF]

, 2011
Reconstructing past water availability, both as rainfall and irrigation, is important to answer questions about the way society reacts to climate and its changes and the role of irrigation in the development of social complexity.
Jenkins, Emma L., Jenkins, Emma, Emma Jenkins, Pascal Flohr, Muldner, Gundula, Muldner, G., Flohr, Pascal, Flohr, P., Gundula Müldner   +8 more
core   +1 more source

Anisotropic Phonon Dynamics and Directional Transport in Actinide Van der Waals Semiconductor Uranium Triselenide

Advanced Functional Materials, EarlyView.
USe3 is introduced as an actinide van der Waals semiconductor that mirrors the quasi‐one‐dimensional physics of transition‐metal trichalcogenides. Polarization‐resolved Raman spectroscopy on exfoliated flakes maps strong in‐plane phonon anisotropy and strain‐tunable mode shifts.
Aljoscha Söll, Valentino Jadriško, Sourav Dey, Nassima Benchtaber, Kalyan Sarkar, Borna Radatović, Jan Luxa, Fedor Lipilin, Kseniia Mosina, Vojtěch Kundrát, Jakub Zalesak, Jana Vejpravová, Martin Žáček, Szymon J. Zelewski, Nikolas Antonatos, Christoph Gadermaier, José J. Baldoví, Zdeněk Sofer   +17 more
wiley   +1 more source

Emerging techniques in vegetable oil analysis using stable isotope ratio mass spectrometry

Grasas y Aceites, 2002
As the practice of vegetable oil adulteration becomes more sophisticated, the possibility to subvert detection using established techniques such as capillary gas chromatography is increasing.
Simon D. Kelly, Christopher Rhodes
doaj   +1 more source

Designing Vanadium‐Based Oxide Electrocatalysts for Water Splitting: Experimental and Mechanistic Insights with Machine Learning

Advanced Functional Materials, EarlyView.
This review establishes structure‐property‐mechanism relationships across six modification strategies for V‐based oxide water‐splitting electrocatalysts: lattice engineering, heteroatom doping, interface engineering, carbon‐based hybridization, morphology engineering, and surface reconstruction and pre‐catalyst design, where dissolution is reframed as ...
Youness El Issmaeli, Amina Lahrichi, Hoje Chun, Rafael Gómez‐Bombarelli, Bruno G. Pollet   +4 more
wiley   +1 more source

Photo‐Degradable Polyester Networks and Multi‐Photon Printed Objects Based on Cyclic Ketene Acetals

Advanced Functional Materials, EarlyView.
The current work introduces a photoreversible polyester network derived from radical ring‐opening polymerization of cyclic ketene acetals. It combines photoreversible cross‐linking with initiator‐free multi‐photon printing. Reversible network formation, tunable mechanical properties, and selective degradation highlight its potential as a versatile ...
Till Meissner, Julian Fanelli, Vinh Xuan Truong, Rob Jones, Jens Gaitzsch, Christopher Barner‐Kowollik   +5 more
wiley   +1 more source

Measurement of Stable Carbon Isotope Ratio of Volatile Organic Compounds Using Thermal Desorption-Gas Chromatography-Combustion-Isotope Ratio Mass Spectrometry

International Journal of Analytical Chemistry
This paper presents a method combining a thermal desorption (TD) unit with gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS) to determine compound specific δ13C values of seven VOCs (benzene, toluene, ethylbenzene, m/p-xylene, o ...
Li Yuhong, Lin Xihuang, Lin Cifu, Yin Xijie   +3 more
doaj   +1 more source

Chemical stability of levoglucosan: An isotopic perspective

Geophysical Research Letters, 2016
The chemical stability of levoglucosan was studied by exploring its isotopic fractionation during the oxidation by hydroxyl radicals. Aqueous solutions as well as mixed (NH4)2SO4‐levoglucosan particles were exposed to OH.
X. F. Sang, I. Gensch, B. Kammer, A. Khan, E. Kleist, W. Laumer, P. Schlag, S. H. Schmitt, J. Wildt, R. Zhao, E. L. Mungall, J. P. D. Abbatt, A. Kiendler‐Scharr   +12 more
doaj   +1 more source

A method for stable carbon isotope ratio and concentration measurements of ambient aromatic hydrocarbons [PDF]

Atmospheric Measurement Techniques, 2015
A technique for compound-specific analysis of stable carbon isotope ratios and concentration of ambient volatile organic compounds (VOCs) is presented. It is based on selective VOC sampling onto adsorbent-filled cartridges by passing large volumes of air
A. Kornilova, S. Moukhtar, M. Saccon, L. Huang, W. Zhang, J. Rudolph   +5 more
doaj   +1 more source

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

¹⁵N stable isotope probing of pulp and paper wastewaters [PDF]

, 2008
Stable isotope probing (SIP) is an established technique that can be applied to identify the metabolically active micro-organisms within a microbial population.
Addison, Sarah Louise
core