Results 91 to 100 of about 1,249,807 (384)

Absolute spacetime: the twentieth century ether [PDF]

, 1998
All gauge theories need ``something fixed'' even as ``something changes.'' Underlying the implementation of these ideas all major physical theories make indispensable use of an elaborately designed spacetime model as the ``something fixed,'' i.e ...
A. Connes, A. Grünbaum, A. Marlow, A. Trautman, C. Brans, C. Brans, C. Lämmerzahl, C. Rovelli, Carl H. Brans, E. Mielke, E. Whittaker, F. Hehl, F. Hehl, J. Earman, J. Madore, M. Heller, T. Asselmeyer   +16 more
core   +3 more sources

Advancing Wildfire‐Retardant Materials: Engineering Strategies for Direct and Indirect Suppression

Advanced Engineering Materials, EarlyView.
Here, the evolution, ecological impact, and performance of current fire‐retardant materials and suppression strategies are reviewed, offering an engineering perspective to address existing challenges and propose pathways for the development of more effective, scalable, and sustainable solutions to meet the demands of a changing climate. Wildfires cause
Changxin Dong, Samya Sen, Athena Kolli, Stewart G. Wilson, Eric Andrew Appel   +4 more
wiley   +1 more source

Bis{4-[(2-hydroxy-5-methoxy-3-nitrobenzylidene)amino]phenyl} ether

Acta Crystallographica Section E: Crystallographic Communications, 2020
The molecule of the title compound, C28H22N4O9, exhibits crystallographically imposed twofold rotational symmetry, with a dihedral angle of 66.0 (2)° between the planes of the two central benzene rings bounded to the central oxygen atom.
Md. Azharul Arafath, Huey Chong Kwong, Farook Adam, Md. Mohiuddin, Md. Sohug Sarker, Mohammad Salim, Md. Mahbubul Alam   +6 more
doaj   +1 more source

Microscale 3D Printed Pillars and Porous Polymeric Structures: Manufacturability and Micromechanics

Advanced Engineering Materials, EarlyView.
This work demonstrates how two‐photon polymerization enables the fabrication of microscale solid and porous structures from IP‐Q, IP‐S, and IP‐PDMS resins. Combining morphological and mechanical characterization, the study provides the first systematic insights into IP‐Q mechanics and reveals how processing parameters affect structure and stiffness ...
Aikaterini Isaakidou, Mahya Ganjian, Vahid Moosabeiki, Marius Alexander Leeflang, Mahdiyeh Nouri Goushki, Pouyan Esmailzadeh Boukany, Maria Wątroba, Alexander Groetsch, Jakob Schwiedrzik, Mohammad Javad Mirzaali, Iulian Apachitei, Lidy Elena Fratila‐Apachitei, Amir Abbas Zadpoor   +12 more
wiley   +1 more source

CO2 Recycling to Dimethyl Ether: State-of-the-Art and Perspectives

Molecules, 2017
This review reports recent achievements in dimethyl ether (DME) synthesis via CO2 hydrogenation. This gas-phase process could be considered as a promising alternative for carbon dioxide recycling toward a (bio)fuel as DME. In this view, the production of
E. Catizzone, G. Bonura, M. Migliori, F. Frusteri, G. Giordano   +4 more
semanticscholar   +1 more source

Factors Dictating Carbene Formation at (PNP)Ir [PDF]

, 2010
The mechanistic subtleties involved with the interaction of an amido/bis(phosphine)-supported (PNP)Ir fragment with a series of linear and cyclic ethers have been investigated using density functional theory.
Ariafard, Alireza, Brookes, Nigel J., Grubbs, Robert H., Stranger, Robert, Whited, Matthew T., Yates, Brian F.   +5 more
core   +1 more source

Efficient and Scalable Radiative Cooling for Photovoltaics Using Solution‐Processable and Solar‐Transparent Mesoporous Nanoparticles

Advanced Functional Materials, EarlyView.
Graded refractive index (GRI) structures are prepared from the layer‐by‐layer spray coating of the mesoporous SiO2 nanoparticles, showing high solar transparency and thermal emissivity. Under outdoor conditions, after 50 days, the GRI‐coated photovoltaics show on average 6.65 ± 1.48 °C lower than that of the non‐coated references, maintaining 80.9 ± 8 ...
Heesuk Jung, Sung Yoon Min, Byungsoo Kang, Yongseok Yoo, Jihun Jang, Yeoun‐Woo Jang, Hyojeong Choi, Hyeong Won Lee, Swarup Biswas, Yongju Lee, Mansoo Choi, Phillip Lee, Min Seok Jang, Hyeok Kim, Shu Yang   +14 more
wiley   +1 more source

From classification medicine to clinical medicine (the end of the XVIII century - 1870s). Communication 5. Reforms in therapy in 1840s-1860s

Терапевтический архив, 2012
Reforms of therapy in 1840-1860s are considered: development of the methods of objective assessment of efficacy of some methods of treatment, appearance of experimental pharmacology, introduction of anasthesia.
Andrey Mikhaylovich Stochik, Sergey Narkizovich Zatravkin, A M Stochik, S N Zatravkin   +3 more
doaj  

Crystal structure of pyriproxyfen

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound {systematic name: 4-phenoxyphenyl (RS)-2-[(pyridin-2-yl)oxy]propyl ether}, C20H19NO3, which is a juvenile hormone mimic and insecticide, the dihedral angles between the plane of the central benene ring and those of the pendant ...
Gihaeng Kang, Jineun Kim, Hyunjin Park, Tae Ho Kim   +3 more
doaj   +1 more source

Method of producing alternating ether siloxane copolymers Patent [PDF]

, 1967
Method for producing alternating ether-siloxane copolymers with stable properties when exposed to elevated temperatures and UV ...
Curry, J. E.
core   +1 more source