Results 51 to 60 of about 818,954 (398)

Foamed emulsion drainage: flow and trapping of drops [PDF]

open access: yes, 2017
Foamed emulsions are ubiquitous in our daily life but the ageing of such systems is still poorly understood. In this study we investigate foam drainage and measure the evolution of the gas, liquid and oil volume fractions inside the foam.
Langevin, Dominique   +3 more
core   +2 more sources

Ni/Al2O3/Foam Electric Heating Catalyst: Mitigating Carbon Emissions and Enhancing Reactor Temperature Uniformity

open access: yesEnergies
Substituting the traditional fuel combustion heating mode in hydrogen production reactors with electric heating demonstrates a significant potential for reducing carbon dioxide emissions.
Yanlun Ren, Li Zhang, Hong Xu
doaj   +1 more source

Friction Welding of Polycarbonate Plate and Aluminum Foam Fabricated by Precursor Foaming Process

open access: yesMetals, 2023
Aluminum foam is expected to be one of the candidates for lightweight materials for structural components as it is lightweight and has excellent shock absorption and sound absorption properties.
Yoshihiko Hangai   +4 more
doaj   +1 more source

Spin Foams [PDF]

open access: yes, 2014
The spin foam framework provides a way to define the dynamics of canonical loop quantum gravity in a spacetime covariant way, by using a path integral over histories of quantum states which can be interpreted as `quantum space-times'. This chapter provides a basic introduction to spin foams aimed principally at beginning graduate students and, where ...
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

Aditives influence on fermentation run.

open access: yesKvasný průmysl, 2005
In the work it was studied the influence of antifoam and yeast food usage on fermentation run, diacetyl reduction and finished beer quality in the wort of 13 °P gravity.
Mariana CVENGROSCHOVÁ   +1 more
doaj   +1 more source

Polysilazane as a new foaming agent to prepare high-strength, low-density epoxy foam [PDF]

open access: yesRoyal Society Open Science, 2019
Polysilazane (PSN2) was used as chemical foaming agent to prepare epoxy foam for the first time. Using the new foaming agent, epoxy foams with high strength and low density were successfully prepared.
Yucheng Chang   +3 more
doaj   +1 more source

Marangoni Flow Investigation in Foam Fractionation Phenomenon

open access: yesFluids, 2023
In this study, a numerical investigation of the Marangoni flow in foam fractionation was conducted, with a specific focus on the film of micro-foams in both the interior and exterior regions.
Nastaran Rezaee, John Aunna, Jamal Naser
doaj   +1 more source

History and new trends of research into overfoaming of beer.

open access: yesKvasný průmysl, 2013
Although over-foaming of beer (so-called gushing) is manifested only in the final product, its origin and development is realized much earlier . Quality of raw materials and subsequently the whole malting process markedly affect its origin, further ...
Michaela POŠTULKOVÁ   +5 more
doaj   +1 more source

Ultrastable and Responsive Foams Based on 10-Hydroxystearic Acid Soap for Spore Decontamination

open access: yesMolecules, 2023
Currently, there is renewed interest in using fatty acid soaps as surfactants. Hydroxylated fatty acids are specific fatty acids with a hydroxyl group in the alkyl chain, giving rise to chirality and specific surfactant properties.
Carolina Dari   +6 more
doaj   +1 more source

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