Results 41 to 50 of about 114,935 (289)

One-pot Synthesis of 2-Substituted 4H-Chromeno[3,4-d]oxazol-4-ones from 4-Hydroxy-3-nitrocoumarin and Acids in the Presence of Triphenylphosphine and Phosphorus Pentoxide under Microwave Irradiation

SynOpen, 2018
2-Substituted 4H-chromeno[3,4-d]oxazol-4-ones are prepared from 4-hydroxy-3-nitrocoumarin and acids by one-pot reaction in the presence of PPh3 and P2O5 under microwave irradiation or by one-pot two-step reactions in the presence of Pd/C and hydrogen and
T. D. Balalas, G. Stratidis, D. Papatheodorou, E.-E. Vlachou, C. Gabriel, D. J. Hadjipavlou-Litina, K. E. Litinas   +6 more
doaj   +1 more source

Thermal treatment using microwave irradiation for the phytosanitation of Xylella fastidiosa in pecan graftwood.

PLoS ONE, 2021
Pecan bacterial leaf scorch caused by Xylella fastidiosa is an emerging disease for the U.S. and international pecan industries and can be transmitted from scion to rootstock via grafting.
Angelyn Hilton, Myunghwan Jeong, Jui-Hung Hsu, Fan Cao, Woongchul Choi, Xinwang Wang, Choongho Yu, Young-Ki Jo   +7 more
doaj   +1 more source

Impact of Pre‐Oxidation Treatments on a Recycled MgO/Steel‐Composite as Carbon Free Anode in Aluminum‐Electrolysis Environments

Advanced Engineering Materials, EarlyView.
Cermets (60 vol.% AISI 316L stainless steel, 40 vol.% recycled MgO), intended for use in aluminum electrolysis, were pre‐oxidized in three furnaces with different heating technologies and subjected to a cryolite corrosion test. The different atmospheres influenced the formation of oxide layers, which in turn affected corrosion resistance and ...
Patricia Kaiser, Felix Drechsler, Nora Brachhold, Florian Kerber, Christos G. Aneziris   +4 more
wiley   +1 more source

Synthesis and Characterization of CeO2-SiO2 Nanoparticles by Microwave-Assisted Irradiation Method for Photocatalytic Oxidation of Methylene Blue Dye

International Journal of Photoenergy, 2012
CeO2-SiO2 nanoparticles were synthesized for the first time by a facile microwave-assisted irradiation process. The effect of irradiation time of microwave was studied. The materials were characterized by N2 adsorption, XRD, UV-vis/DR, and TEM.
R. M. Mohamed, E. S. Aazam
doaj   +1 more source

Microwave zero-resistance states in a bilayer electron system

, 2010
Magnetotransport measurements on a high-mobility electron bilayer system formed in a wide GaAs quantum well reveal vanishing dissipative resistance under continuous microwave irradiation.
A. K. Bakarov, G. M. Gusev, J. C. Portal, O. E. Raichev, S. Wiedmann, V. I. Ryzhii, V. I. Ryzhii   +6 more
core   +1 more source

Heating causes non-linear microwave absorption anomaly in single wall carbon nanotubes [PDF]

, 2018
Microwave impedance measurements indicate a non-linear absorption anomaly in single wall carbon nanotubes at low temperatures (below $20$ K). We investigate the nature of the anomaly using a time resolved microwave impedance measurement technique.
Csősz, Gábor, Gyüre, Balázs, Karsa, Anita, Márkus, Bence Gábor, Márkus, Ferenc, Simon, Ferenc, Sági, Olivér   +6 more
core   +2 more sources

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Microwave-Assisted Synthesis of Some 3,5-Arylated 2-Pyrazolines

Molecules, 2003
Condensation of 2-acetylnaphthalene with benzaldehydes under microwave irradiation affords chalcones which undergo facile and clean cyclizations with hydrazines RNHNH2 (R= H, Ph, Ac) to afford 3,5-arylated 2-pyrazolines in quantitative yields, also under
Hassan Ghasemnejad, Davood Azarifar
doaj   +1 more source

Magnetoplasmon resonance in 2D electron system driven into a zero-resistance state [PDF]

, 2012
We report on a remarkably strong, and a rather sharp, photoresistance peak originating from a dimensional magnetoplasmon resonance (MPR) in a high mobility GaAs/AlGaAs quantum well driven by microwave radiation into a zero-resistance state (ZRS).
A. T. Hatke, A. V. Chaplik, J. D. Watson, M. A. Zudov, M. J. Manfra, V. I. Ryzhii   +5 more
core   +3 more sources

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source