Results 31 to 40 of about 1,040,831 (304)

Argon plasma treatment techniques on steel and effects on diamond-like carbon structure and delamination [PDF]

open access: yes, 2011
Copyright © 2011 Elsevier B.V. All rights reserved.We demonstrate alteration in diamond-like carbon (DLC) film structure, chemistry and adhesion on steel, related to variation in the argon plasma pretreatment stage of plasma enhanced chemical vapour ...
B.J. Jones   +28 more
core   +1 more source

Apparent crystallite domain size growth in metal oxide nanocrystal ensembles: The importance of surface reactivity of powders for processing

open access: yesOpen Ceramics, 2020
A major challenge related to metastable oxide nanoparticles as starting materials for ceramics is to achieve control over their processing related property changes.
Thomas Schwab   +4 more
doaj   +1 more source

Enhanced Nitrate Fraction: Enabling Urban Aerosol Particles to Remain in a Liquid State at Reduced Relative Humidity

open access: yesGeophysical Research Letters, 2023
Nitrate has become the primary inorganic compound in urban aerosol particles, but its effects on particle phase state, which is crucial in multiphase chemistry, remains largely unknown.
Y. C. Liu   +7 more
doaj   +1 more source

Production of Fuel-Like Fractions by Fractional Distillation of Bio-Oil from Açaí (Euterpe oleracea Mart.) Seeds Pyrolysis

open access: yesEnergies, 2021
This work investigates the effect of production scales (laboratory, bench, and pilot) by pyrolysis of Açaí (Euterpe oleracea Mart.) seeds at 450 °C and 1.0 atmosphere, on the yields of reaction products and acid value of bio-oils.
Douglas Alberto Rocha de Castro   +9 more
doaj   +1 more source

The ionization fraction gradient across the Horsehead edge: An archetype for molecular clouds

open access: yes, 2009
The ionization fraction plays a key role in the chemistry and dynamics of molecular clouds. We study the H13CO+, DCO+ and HOC+ line emission towards the Horsehead, from the shielded core to the UV irradiated cloud edge, i.e., the Photodissociation Region
Bourlot, J. Le   +4 more
core   +5 more sources

High-throughput in-situ characterization and modelling of precipitation kinetics in compositionally graded alloys [PDF]

open access: yes, 2015
The development of new engineering alloy chemistries is a time consuming and iterative process. A necessary step is characterization of the nano/microstructure to provide a link between the processing and properties of each alloy chemistry considered ...
De Geuser, F.   +3 more
core   +3 more sources

Contribution of liquid, NAT and ice particles to chlorine activation and ozone depletion in Antarctic winter and spring [PDF]

open access: yesAtmospheric Chemistry and Physics, 2015
Heterogeneous reactions in the Antarctic stratosphere are the cause of chlorine activation and ozone depletion, but the relative roles of different types of polar stratospheric clouds (PSCs) in chlorine activation is an open question.
O. Kirner   +3 more
doaj   +1 more source

Joint scalar PDF simulations of a bluff-body stabilised flame with the REDIM approach [PDF]

open access: yes, 2009
Transported joint scalar probability density function (PDF) results are presented for ‘Sydney Flame HM3’, a jet type turbulent flame with strong turbulence – chemistry interaction, stabilized behind a bluff body.
Maas, Ulrich   +3 more
core  

Using deuterated H3+ and other molecular species to understand the formation of stars and planets

open access: yes, 2012
The H3+ ion plays a key role in the chemistry of dense interstellar gas clouds where stars and planets are forming. The low temperatures and high extinctions of such clouds make direct observations of H3+ impossible, but lead to large abundances of H2D ...
Lucas R., Pagani L., van der Werf P. P.
core   +1 more source

Efficient sympathetic motional ground-state cooling of a molecular ion [PDF]

open access: yes, 2015
Cold molecular ions are promising candidates in various fields ranging from precision spectroscopy and test of fundamental physics to ultra-cold chemistry.
Gebert, Florian   +3 more
core   +3 more sources

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