Results 41 to 50 of about 515,451 (307)

Insights on the polymerization kinetics of non-isocyanate polyurethanes (NIPU) using in situ NMR spectroscopy

open access: yesPolymer Testing
An in situ characterization method using liquid Nuclear Magnetic Resonance (NMR) spectroscopy has been developed to aid the preparation of highly reactive non-isocyanate polyurethanes (NIPUs) from cyclic carbonate aminolysis.
Anthony Monmagnon   +6 more
doaj   +1 more source

Foam EOR as an Optimization Technique for Gas EOR: A Comprehensive Review of Laboratory and Field Implementations

open access: yesEnergies, 2023
Foam-enhanced oil recovery (EOR) is poised to become one of the most promising tertiary recovery techniques to keep up with the continuously increasing global energy demands.
Ayomikun Bello   +2 more
doaj   +1 more source

so(4) Plebanski Action and Relativistic Spin Foam Model [PDF]

open access: yes, 1998
In this note we study the correspondence between the ``relativistic spin foam'' model introduced by Barrett, Crane and Baez and the so(4) Plebanski action.
Baez J   +16 more
core   +2 more sources

Ultra-Porous Nanocellulose Foams: A Facile and Scalable Fabrication Approach

open access: yesNanomaterials, 2019
Cellulose nanofibril foams are cellulose-based porous materials with outstanding mechanical properties, resulting from the high strength-to-weight ratio of nanofibrils.
Carlo Antonini   +6 more
doaj   +1 more source

Foam clogging [PDF]

open access: yesSoft Matter, 2014
To what extent are aqueous foams prone to clogging?
Rouyer, Florence   +4 more
openaire   +2 more sources

4-dimensional Spin-foam Model with Quantum Lorentz Group

open access: yes, 2011
We study the quantum group deformation of the Lorentzian EPRL spin-foam model. The construction uses the harmonic analysis on the quantum Lorentz group.
Han, Muxin
core   +3 more sources

Influence of orientation and radiative heat transfer on aluminum foams in Buoyancy-induced convection [PDF]

open access: yes, 2015
Two differently-produced open-cell aluminum foams were compared to a commercially available finned heat sink. Further, an aluminum plate and block were tested as a reference. All heat sinks have the same base plate dimensions of four by six inches.
Billiet, MarijnUGent0000901106738020018686019745145821810000-0002-1778-66821D5B7180-F0EE-11E1-A9DE-61C894A0A6B4   +4 more
core   +3 more sources

Inca Foams [PDF]

open access: yesJournal of Knot Theory and Its Ramifications, 2017
We study a certain class of embedded [Formula: see text]-foams that arise from gluing disks into ribbon torus knots along nonintersecting torus meridians. We exhibit several equivalent diagrammatic formalisms for these objects and identify several of their invariants, including a unique prime factorization.
Carmi, Avishy Y., Moskovich, Daniel
openaire   +2 more sources

The Feynman propagator for quantum gravity: spin foams, proper time, orientation, causality and timeless-ordering

open access: yes, 2004
We discuss the notion of causality in Quantum Gravity in the context of sum-over-histories approaches, in the absence therefore of any background time parameter.
Oriti, Daniele
core   +4 more sources

Foam - rediscovered drug form [PDF]

open access: yesFarmacja Polska, 2020
Foam is a multiphase system consisting mainly of gas dispersed in a liquid or solid. The continuous phase creates a very large surface with a small thickness, which is very thermodynamically unfavorable, and thus causes high instability of the system ...
Dorota Haznar-Garbacz
doaj   +1 more source

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