Results 11 to 20 of about 506,757 (254)

The Meyer-Neldel rule for a property determined by two transport mechanisms [PDF]

open access: yes, 2002
We propose that the Meyer-Neldel rule (MNR) arises naturally for a quantity where both an intrinsic process as well as a process involving impurities contribute. The strength of the latter depends solely on the density of the impurities.
Bodegom, Erik   +2 more
core   +2 more sources

Kinetics of lycopene degradation in sunflower and grape seed oils [PDF]

open access: yes, 2018
The stability of lycopene in two vegetable oils, sunflower seed oil (SSO) and grape seed oil (GSO), was investigated by analyzing the carotenoid degradation kinetics in the temperature range of 10–40°C.
González, Erenio   +3 more
core   +1 more source

The influence of alkaline activator concentration on the apparent activation energy of alkali-activated materials [PDF]

open access: yesMATEC Web of Conferences, 2020
The aim of this article is to analyse the changes of apparent activation energy (Ea) of alkali-activated materials (AAM) at temperatures up to 100°C. Apparent activation energy (Ea) refers to the minimum amount of energy is required for the occurrence of reaction. The existing AAM research is based on assumptions about Portland cement (OPC).
Mierzwiński Dariusz   +2 more
openaire   +2 more sources

Effect of temperature on Brettanomyces bruxellensis: metabolic and kinetic aspects [PDF]

open access: yes, 2008
The effect of temperatures ranging from 15 to 35 °C on a culture of Brettanomyces bruxellensis was investigated in regards to thermodynamics, metabolism, and kinetics. In this temperature range, we observed an increase in growth and production rates. The
Brandam, Cédric   +4 more
core   +2 more sources

Spin-density-wave transition of (TMTSF)$_2$PF$_6$ at high magnetic fields [PDF]

open access: yes, 2001
The transverse magnetoresistance of the Bechgaard salt (TMTSF)$_2$PF$_6$ has been measured for various pressures, with the field up to 24 T parallel to the lowest conductivity direction c$^{\ast}$.
A. Bjeliš   +21 more
core   +3 more sources

Influence of calcination conditions on structural and solid‐state kinetic properties of iron oxidic species supported on SBA‐15 [PDF]

open access: yes, 2019
Iron oxidic species supported on silica SBA-15 were synthesized with various iron loadings using two different FeIII precursors. The effect of varying powder layer thickness during calcination on structural and solid-state kinetic properties of FexOy/SBA-
Genz, Nina Sharmen, Ressler, Thorsten
core   +1 more source

Calorimetric study of geopolymer binders based on natural pozzolan [PDF]

open access: yes, 2017
This paper investigates the kinetics of geopolymerisation in an inorganic polymeric binder based on a natural pozzolan. The heat released by the exothermic geopolymerisation reaction process is monitored under isothermal temperature conditions ...
A Fernández-Jiménez   +41 more
core   +1 more source

Flow stress and hot deformation activation energy of 6082 aluminium alloy influenced by initial structural state [PDF]

open access: yes, 2019
Stress-strain curves of the EN AW 6082 aluminium alloy with 1.2 Si-0.51 Mg-0.75 Mn (wt.%) were determined by the uniaxial compression tests at temperatures of 450-550 degrees C with a strain rate of 0.5-10 s(-1).
Kawulok, Petr   +5 more
core   +1 more source

Kinetics of the thermal degradation of Erica arborea by DSC: Hybrid kinetic method

open access: yes, 2008
The scope of this work was the determination of kinetic parameters of the thermal oxidative degradation of a Mediterranean scrub using a hybrid method developed at the laboratory. DSC and TGA were used in this study under air sweeping to record oxidative
Abramowitz   +26 more
core   +2 more sources

Comparing the contribution of visible-light irradiation, gold nanoparticles, and titania supports in photocatalytic nitroaromatic coupling and aromatic alcohol oxidation [PDF]

open access: yes, 2016
Under visible-light irradiation, gold nanoparticles (Au NPs) supported by titania (TiO₂) nanofibers show excellent activity and high selectivity for both reductive coupling of nitroaromatics to corresponding azobenzene or azoxylbenzene and selective ...
Bo, Arixin   +7 more
core   +1 more source

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