Results 31 to 40 of about 43,895 (165)

Modelling and simulation of the degradation of perfluorinated ion-exchange membranes in PEM fuel cells [PDF]

open access: yes, 2009
A polymer-electrolyte membrane fuel cell model that incorporates chemical degradation in perlfluorinated sulfonic acid membranes is developed. The model is based on conservation principles and includes a detailed description of the transport phenomena. A
Ralph, T.R.   +5 more
core   +1 more source

Adsorption Properties of Hydrocarbon and Fluorocarbon Surfactants Ternary Mixture at the Water-Air Interface

open access: yesMolecules, 2021
Measurements were made of the surface tension of the aqueous solutions of p-(1,1,3,3-tetramethylbutyl) phenoxypoly(ethylene glycols) having 10 oxyethylene groups in the molecule (Triton X-100, TX100) and cetyltrimethylammonium bromide (CTAB) with Zonyl ...
Bronisław Jańczuk   +2 more
doaj   +1 more source

Mutual Influence of Some Flavonoids and Classical Nonionic Surfactants on Their Adsorption and Volumetric Properties at Different Temperatures

open access: yesMolecules, 2022
Due to the increasing practical use of mixtures of flavonoids with nonionic surfactants the presented studies were based on the measurements of surface tension and conductivity of aqueous solution of the quercetin (Q) and rutin (Ru) in the mixtures with ...
Anna Taraba   +3 more
doaj   +1 more source

Hot Electron Phenomena at Solid-Liquid Interfaces

open access: yes, 2022
© 2022 American Chemical Society.Understanding the role of energy dissipation and charge transfer under exothermic chemical reactions on metal catalyst surfaces is important for elucidating the fundamental phenomena at solid-gas and solid-liquid ...
Si Woo Lee   +5 more
core   +1 more source

Optimization of Biodiesel Production Using Immobilized Candida Rugosa Lipase on Magnetic Fe3O4-Silica Aerogel [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2019
Hydrophobic magnetic silica aerogel was used as a support to immobilize Candida rugosa lipase by adsorption method. Physical and chemical properties of the support and immobilized lipase were determined by Field Emission Scanning Electron Microscope ...
Leila Amirkhani   +2 more
doaj  

Rehydrogenation of Sodium Borates to Close the NaBH4-H2 Cycle: A Review

open access: yesEnergies, 2021
In 2007, the US Department of Energy recommended a no-go on NaBH4 hydrolysis for onboard applications; however, the concept of a NaBH4-H2-PEMFC system has the potential to become a primary source for on-demand power supply.
Helder X. Nunes   +3 more
doaj   +1 more source

Retrocausality in Quantum Phenomena and Chemical Evolution [PDF]

open access: yesInformation, 2016
The interplay between retrocausality and the time-reversal symmetry of the dynamical law of quantum mechanics underscores the significance of the measurement dynamics with the use of indivisible and discrete quantum particles to be mediated. One example of empirical evidence demonstrating the significance of retrocausality going along with time ...
openaire   +2 more sources

The Kuramoto model: A simple paradigm for synchronization phenomena

open access: yes, 2005
Synchronization phenomena in large populations of interacting elements are the subject of intense research efforts in physical, biological, chemical, and social systems.
Acebrón, Juan A.   +4 more
core   +1 more source

Extraction of Bioactive Compounds from C. vulgaris Biomass Using Deep Eutectic Solvents

open access: yesMolecules, 2023
C. vulgaris microalgae biomass was employed for the extraction of valuable bioactive compounds with deep eutectic-based solvents (DESs). Particularly, the Choline Chloride (ChCl) based DESs, ChCl:1,2 butanediol (1:4), ChCl:ethylene glycol (1:2), and ChCl:
Maria Myrto Dardavila   +7 more
doaj   +1 more source

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