Results 31 to 40 of about 4,631,256 (302)

When atomic-scale resolution is not enough: Spatial effects in in situ model catalyst studies [PDF]

open access: yes, 2012
We investigate transport effects in in situ studies of defined model catalysts using a multi-scale modeling approach integrating first-principles kinetic Monte Carlo simulations into a fluid dynamical treatment.
Matera, Sebastian, Reuter, Karsten
core   +2 more sources

Soybean-Oil-Based CO2-Switchable Surfactants with Multiple Heads

open access: yesMolecules, 2021
Oligomeric surfactants display the novel properties of low surface activity, low critical micellar concentration and enhanced viscosity, but no CO2 switchable oligomeric surfactants have been developed so far. The introduction of CO2 can convert tertiary
Huiyu Huang   +3 more
doaj   +1 more source

Modulating the catalytic activity of enzyme-like nanoparticles through their surface functionalization [PDF]

open access: yes, 2017
The inclusion of transition metal catalysts into nanoparticle scaffolds permits the creation of catalytic nanosystems (nanozymes) able to imitate the behaviour of natural enzymes.
Cao-Milán, R.   +9 more
core   +1 more source

Tensiometry as a Simple Analytical Method for Quantification of Solubility and Release of Aroma Molecules in Aqueous Media

open access: yesMolecules, 2021
Dynamic tensiometry is shown to be a high-potential analytical tool in assessing physico-chemical characteristics of fragrance molecules, such as solubility limit, volatility as well as much rarely assessed interfacial activity of these amphiphilic ...
Ruth Kudla   +2 more
doaj   +1 more source

Activity of surface active substances determined from their surface excess [PDF]

open access: yesPhysical Chemistry Chemical Physics, 2005
Commonly, the surface excess is determined from surface tension measurements via the Gibbs equation. This equation relates the activity (chemical potential), the surface excess, and the surface tension. When knowing two out of the three quantities, the third one can be calculated.
Andersson, Gunther   +2 more
openaire   +3 more sources

Gold Nanoparticles on Yttrium Modified Titania: Support Properties and Catalytic Activity [PDF]

open access: yes, 2011
A series of titanium oxide catalysts modified with yttrium has been prepared by sol¿gel method and their structural properties have been studied. The incorporation of yttrium in the titania lattice favors the formation of oxygen vacancies while at low Y ...
Centeno Gallego, Miguel Ángel   +7 more
core   +1 more source

Palmitoylcarnitine, a surface‐active metabolite [PDF]

open access: yesFEBS Letters, 1996
Palmitoylcarnitine is a well‐known intermediate in mitochondrial fatty acid oxidation. Less known are its properties as a surfactant, with a capacity to solubilize biological membranes similar to that of many synthetic detergents used in the biochemical laboratory.
Goñi, Félix M.   +2 more
openaire   +2 more sources

Original Multivalent Gold (III) and Dual Gold(III)-Copper(II) Conjugated Phosphorus Dendrimers as Potent Antitumoral and Antimicrobial Agents [PDF]

open access: yes, 2017
Original metallophosphorus dendrimers (generation 3, 48 terminal groups) have been prepared via the complexation of phosphorus dendrimers bearing imino-pyridino end groups with Au(III) or with both Au(III) and Cu(II).
Anne-Marie Caminade   +11 more
core   +3 more sources

Synthesis of Carboxyl Modified Polyether Polysiloxane Surfactant for the Biodegradable Foam Fire Extinguishing Agents

open access: yesMolecules, 2023
It is necessary to develop novel and efficient alternatives to fluorocarbon surfactant and prepare fluorine-free environmentally-friendly fire extinguishing agent.
Jinqing Jiao   +11 more
doaj   +1 more source

Local manifestations of cometary activity [PDF]

open access: yes, 2019
Comets are made of volatile and refractory material and naturally experience various degrees of sublimation as they orbit around the Sun. This gas release, accompanied by dust, represents what is traditionally described as activity.
El-Maarry, Ramy   +7 more
core   +2 more sources

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