Results 11 to 20 of about 244,951 (247)

Porous Invariants [PDF]

open access: yes, 2021
AbstractWe introduce the notion of porous invariants for multipath (or branching/nondeterministic) affine loops over the integers; these invariants are not necessarily convex, and can in fact contain infinitely many ‘holes’. Nevertheless, we show that in many cases such invariants can be automatically synthesised, and moreover can be used to settle ...
Engel Lefaucheux   +3 more
openaire   +3 more sources

The Role of Cations in Resorcinol–Formaldehyde Gel Textural Characteristics

open access: yesGels, 2022
The production of resorcinol–formaldehyde xerogels has yielded insight into the gelation processes underpinning their structures. In this work, the role of the cation species from the catalyst is probed by studying the simultaneous addition of sodium ...
Stewart J. Taylor   +2 more
doaj   +1 more source

Photoresponsive porous materials

open access: yesNanoscale Advances, 2021
Integration of molecular photoswitches in porous materials i.e. MOFs, COFs, PAFs provides responsive materials with a variety of functions ranging from switchable gas adsorption to macroscopic actuation.
Wojciech Danowski   +3 more
openaire   +4 more sources

Double-pore structure porous Mo–Si–B intermetallics fabricated by elemental powder metallurgy method using NH4HCO3 as pore-forming agent

open access: yesMaterials Research Express, 2020
The multiphase porous intermetallic compounds Mo _3 Si-Mo _5 Si _3 -Mo _5 SiB _2 of a double-pore structure has been successfully fabricated by combining the in situ reaction synthesis with the pore-forming agent method.
Yongan Huang, Laiqi Zhang, Shizhong Wei
doaj   +1 more source

Preparation and characterization of vancomycin-loaded chitosan/PVA/PEG hydrogels for wound dressing

open access: yesMaterials Research Express, 2020
This study describes a drug-loaded porous hydrogel for delivery of vancomycin. Hydrogels based on chitosan (CS), Polyvinyl alcohol (PVA) and Polyethylene glycol (PEG) were prepared by lyophilization.
Mitra Naeimi   +4 more
doaj   +1 more source

The Effects of Annealing Temperatures and Dimethylformamide Doses on Porous TiO2 Films

open access: yesCrystals, 2022
In this study, we develop a facile and feasible synthetic technique for producing denser porous titanium dioxide (TiO2) films. The porous TiO2 films are effectively prepared using a sol–gel process with dimethylformamide (DMF).
Pao-Hsun Huang   +6 more
doaj   +1 more source

Thermal analysis of magnetic Iron-Oxide nanoparticle with combination of Water and Ethylene Glycol passes through a partially heated permeable square enclosure

open access: yesJournal of Taibah University for Science, 2023
The research explores the use of iron oxide nanoparticles to enhance the thermal properties of fluids like water and ethylene glycol. These nanoparticles find applications in engineering and medicine, including wastewater treatment and coatings.
A. Sumithra   +3 more
doaj   +1 more source

In-situ characterization of capillary pressure during three-phase flow in porous media [PDF]

open access: yesE3S Web of Conferences, 2023
We characterize the pore-scale fluid distributions, phase connectivity, and local capillary pressures during three-phase flow in a water-wet Berea sandstone sample.
Zankoor Ahmed   +3 more
doaj   +1 more source

Tailored Porous Materials [PDF]

open access: yesChemistry of Materials, 1999
Tailoring of porous materials involves not only chemical synthetic techniques for tailoring microscopic properties such as pore size, pore shape, pore connectivity, and pore surface reactivity, but also materials processing techniques for tailoring the meso- and the macroscopic properties of bulk materials in the form of fibers, thin films, and ...
Barton, TJ   +10 more
openaire   +2 more sources

The Leachate Release and Microstructure of the Sewage Sludge under the Anaerobic Fermentation

open access: yesJournal of Chemistry, 2015
Pollutant release, pore structure, and thermal effect of sewage sludge during anaerobic fermentation were investigated. Results showed that the pH value firstly declined and then increased during anaerobic fermentation.
Yiqie Dong   +3 more
doaj   +1 more source

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