Results 101 to 110 of about 20,641 (267)

Single‐source precursor synthesis of a compositionally complex early transitional metal nitride (V, Nb, Ta, Mo, W)Nx and its high temperature stability

open access: yesInternational Journal of Applied Ceramic Technology, Volume 23, Issue 1, February 2026.
Abstract Compositionally complex transitional metal nitrides are an interesting class of ceramics with superior chemical, thermal, and mechanical stability, with a high potential in ultra‐high temperature applications and catalysis. The exceptionality in the properties may partly be explained as a consequence of their high configuration entropy ...
Dharma Teja Teppala   +8 more
wiley   +1 more source

Designing Nanostructured Carbon Xerogels

open access: yes, 2011
The syntesis of nanostructure carbon xerogels, the properties of carbon gels and the applications of carbon xerogels are reviewed Peer ...
Calvo, Esther G.   +2 more
openaire   +4 more sources

Self-Assembled Fluorinated Organogelators for Surface Modification

open access: yesApplied Sciences, 2012
A new class of alkyl- and perfluoroalkyl-containing urea and amide derivatives was synthesized from amino acid derivatives. Most of these compounds showed excellent gelation behavior in organic solvents at low concentrations.
Anilkumar Raghavanpillai   +1 more
doaj   +1 more source

Niobium- and antimony-doped tin dioxide aerogels as new catalyst supports for PEM fuel cells [PDF]

open access: yes, 2016
The final publication is available at Springer via http://dx.doi.org/10.1007/s10853-016-9833-7International audienceIn order to tackle the problem of low durability, tin dioxide was studied to replace carbon black as a catalyst support in proton exchange
Beauger, Christian, Ozouf, Guillaume
core   +2 more sources

Electrochemical nitric oxide microsensors based on a fluorinated xerogel screening layer for in vivo brain monitoring.

open access: yesAnalytical Chemistry, 2019
Nitric oxide (NO) is an important free radical synthesized and released by brain cells. At low (nanomolar) levels it modulates synaptic transmission and neuronal activity, but at much higher levels mediates neuronal injury through oxidative stress ...
Anne Meiller   +2 more
semanticscholar   +1 more source

Extração de Al(III), Cr(III) e Fe(III) de meio etanólico usando o xerogel anilinapropilsílica

open access: yesQuímica Nova, 2004
In this study, the preparation of the xerogel anilinepropylsilica is reported. The ability of the xerogel for extracting Al(III), Cr(III) and Fe(III) from ethanol was investigated at 25 ºC.
Pavan Flávio A.   +4 more
doaj  

Controle de papuã (Urochloa plantaginea) e produtividade de milho em solo argiloso através de formulação e doses de atrazina com liberação controlada

open access: yesCiência Rural, 2013
A utilização de herbicidas com formulações com liberação controlada poderá se constituir em uma ferramenta importante para reduzir problemas de lixiviação e garantir a eficácia desses produtos. O objetivo do presente trabalho foi comparar a eficiência de
Eli Danieli Marchesan   +5 more
doaj   +1 more source

Studi Pengaruh Konsentrasi Naoh dan Ph terhadap Sintesis Silika Xerogel Berbahan Dasar Pasir Kuarsa [PDF]

open access: yes, 2013
In this research, the influence of NaOH concentration and gelation pH of the xerogel silica synthesized from quartz sand. It was extracted by NaOH 1, 2, and 3 M to obtain sodium silicate solution and was added by HCl 1M to reach pH value 7, 8, and 9 to ...
Ayu, A. M. (Annisa)   +2 more
core  

Ultrasonic preparation of mesoporous silica using pyridinium ionic liquid [PDF]

open access: yes, 2016
Mesoporous silica matrices have been prepared via classic acid catalyzed and sono-catalyzed sol-gel routes. Tetramethoxysilan (TMOS) and methyl-trimethoxysilane (MTMS) were used as silica precursors, and N-butyl-3-methylpyridinium tetrafluoroborate ...
Almásy, László   +4 more
core   +2 more sources

Ideal Bose gas in fractal dimensions and superfluid $^4$He in porous media

open access: yes, 1999
Physical properties of ideal Bose gas with the fractal dimensionality between D=2 and D=3 are theoretically investigated. Calculation shows that the characteristic features of the specific heat and the superfluid density of ideal Bose gas in fractal ...
Bowley R H   +12 more
core   +1 more source

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