Results 61 to 70 of about 144,773 (289)

Vanadium dispersion and catalytic activity of Pd/VOx/SBA-15 catalysts in the Wacker oxidation of ethylene [PDF]

open access: yes, 2015
Transmission electron microscopy (TEM), X-ray diffractometry (XRD), in situ diffuse reflectance ultra violet e visible (UVeVis) spectroscopy, and temperature-programmed reduction by hydrogen (H2-TPR) were used to identify the vanadia forms in vanadium ...
Barthos, Róbert   +3 more
core   +1 more source

Actuating and Sensing Composites of Liquid Crystal Elastomers and Poly(ionic liquid)s

open access: yesAdvanced Functional Materials, EarlyView.
Ionic conductive, mechanically tough, flexible, and stretchable filaments of a composite material comprising a liquid crystal elastomer and a poly(ionic liquid) are produced through 3D printing, which exhibit large actuation strain under stimulation and electrical resistance variation in response to deformation or environmental condition changes. Their
Zeping Liu   +6 more
wiley   +1 more source

A TEOGONIA DE FERECIDES DE SYROS E O AMBIENTE CULTURAL DO PORTO HELENO-FENÍCIO DE SYROS: UM EXERCÍCIO EM TEORIA E METODOLOGIA DE HISTÓRIA

open access: yesPrometeus: Filosofia em Revista, 2014
Artigo em que se pretende reconstruir o ambiente cultural híbrido da Cíclade Syros no século VI a.C., enfatizando precisamente o sincretismo heleno-fenício, através da análise dos fragmentos da Teogonia de Ferecides de Syros, sob o paradigma teórico ...
Rodrigo Pinto Brito
doaj  

Structural and Chemical Engineering of Sub‐Nanochannel Membranes Toward Ion Selectivity

open access: yesAdvanced Functional Materials, EarlyView.
This review summarizes recent advances in structural and chemical engineering of sub‐nanochannels for ion selectivity. We first introduce fundamental ion transport mechanisms within sub‐nanochannels, followed by strategies to tune pore size, geometry, and surface functionalities, categorized into charge‐based, ion‐recognition, hydrophilic bonding, and ...
Yuyu Su   +5 more
wiley   +1 more source

NOSSO NÚMERO 27

open access: yesPrometeus: Filosofia em Revista, 2018
Caros pesquisadores, segue nosso número 27, com artigos de fluxo contínuo e mais um dossiê estoicismo com os textos referentes ao segundo colóquio Epicteto, que se realizou em 2017 na cidade de Niterói, no campus da UFF.
Aldo Dinucci
doaj  

Local oxidation of Ga[Al]As heterostructures with modulated tip-sample voltages

open access: yes, 2006
Nanolithography based on local oxidation with a scanning force microscope has been performed on an undoped GaAs wafer and a Ga[Al]As heterostructure with an undoped GaAs cap layer and a shallow two-dimensional electron gas.
Driscoll, D. C.   +6 more
core   +1 more source

“Als wel the lord as the schepherde, He broghte hem alle in good accord”: Harmonious Materialism in the Confessio Amantis [PDF]

open access: yes, 2020
Using R. F. Yeager\u27s analysis of the figure Arion as a starting point, this article argues that in the Confessio Amantis, John Gower shifts his impulse toward social correction from direct estates satire to a more subtle approach encoding his social ...
Ladd, Roger A.
core   +1 more source

Coacervates Made of Elastin‐Like Polypeptides Fused with Melanocyte‐Stimulating Hormone and Monocyte Chemoattractant Protein Enhance Skin Wound Healing in Spinal Cord‐Injured Mice

open access: yesAdvanced Healthcare Materials, EarlyView.
Pressure skin wounds are frequent complications after spinal cord injury (SCI), with impaired healing due to vascular and immune deficits. Elastin‐like polypeptides (ELP) fused to α‐MSH (MSH‐ELP) or MCP‐1 (MCP‐ELP) are developed and tested on these wounds. The resulting nanoparticles are non‐toxic and bioactive, and they enhance macrophage recruitment,
Suneel Kumar   +7 more
wiley   +1 more source

QUADROS CONCEITUAIS DO CETICISMO ANTERIOR A SEXTO EMPÍRICO

open access: yesPrometeus: Filosofia em Revista, 2013
Artigo em que demonstramos, através de tabelas que servem como ferramentas depesquisa, os principais ganhos conceituais do ceticismo anterior a Sexto Empírico, em suasdiferentes fases.
Rodrigo Pinto de Brito
doaj  

Vox populi or vox Dei? [PDF]

open access: yesBritish Journal of Sports Medicine, 2002
It may interest readers to know that Australia has had an unexpected fallout of the 2000 Sydney Olympics—an increase in the population! At a time when politicians are calling for an increase in birth rates, it is pleasing to note that sports medicine is doing its best for the nation. A recent newspaper report noted that 35 overseas athletes who came to
openaire   +2 more sources

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