Results 31 to 40 of about 880,441 (304)

Recombination Reactions as a Possible Mechanism of Mass-Independent Fractionation of Sulfur Isotopes in the Archean Atmosphere of Earth [PDF]

open access: yes, 2017
A hierarchy of isotopically substituted recombination reactions is formulated for production of sulfur allotropes in the anoxic atmosphere of Archean Earth.
Babikov, Dmitri
core   +2 more sources

Mechanical properties of tyramine substituted‐hyaluronan enriched fascia extracellular matrix [PDF]

open access: yesJournal of Biomedical Materials Research Part A, 2012
AbstractNaturally occurring biomaterial scaffolds derived from extracellular matrix (ECM) have been the topic of recent investigation in the context of rotator cuff tendon repair. We previously reported a method to treat fascia ECM with high molecular weight tyramine substituted‐hyaluronan (TS‐HA) for use as a tendon augmentation scaffold. The presence
Likang, Chin   +3 more
openaire   +2 more sources

Application of gas wettability alteration to improve methane drainage performance: A case study

open access: yesInternational Journal of Mining Science and Technology, 2021
Hydraulic fracturing technique is widely used for methane drainage and has achieved good effects in numerous coal mines, but negative effects may occur as the fracturing fluids are absorbed into the coal seam.
Lin Jia   +4 more
doaj   +1 more source

Three-dimensional non-linear fracture mechanics by enriched meshfree methods without asymptotic enrichment [PDF]

open access: yes, 2007
This paper presents a three-dimensional, extrinsically enriched mesh-free method for initiation, growth and coalescence of an arbitrary number of cracks in non-linear solids including large deformations, for statics and dynamics.
Bordas, Stéphane, Zi, G., Rabczuk, T.
openaire   +2 more sources

A primordial origin for the atmospheric methane of Saturn's moon Titan [PDF]

open access: yes, 2009
The origin of Titan's atmospheric methane is a key issue for understanding the origin of the Saturnian satellite system. It has been proposed that serpentinization reactions in Titan's interior could lead to the formation of the observed methane ...
Alibert   +41 more
core   +4 more sources

An astrophysically-relevant mechanism for amino acid enantiomer enrichment

open access: yesChemical Communications, 2007
The sublimation of low ee amino acids was examined while exploring simple mechanisms by which high ee amino acids can be generated under conditions that exist in space; significant enantioenrichment of a variety of amino acids by sublimation was achieved.
Fletcher, S, Jagt, R, Feringa, B
openaire   +4 more sources

On the role of micro-inertia in enriched continuum mechanics [PDF]

open access: yesProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2017
In this paper, the role of gradient micro-inertia termsη¯∥ ∇u,t∥2and free micro-inertia termsη∥P,t∥2is investigated to unveil their respective effects on the dynamic behaviour of band-gap metamaterials. We show that the termη¯∥ ∇u,t∥2alone is only able to disclose relatively simplified dispersive behaviour.
Madeo, Angela   +4 more
openaire   +4 more sources

Counterflow dielectrophoresis for trypanosome enrichment and detection in blood [PDF]

open access: yes, 2012
Human African trypanosomiasis or sleeping sickness is a deadly disease endemic in sub-Saharan Africa, caused by single-celled protozoan parasites. Although it has been targeted for elimination by 2020, this will only be realized if diagnosis can be ...
A Carlsson   +19 more
core   +1 more source

Lithium abundances along the RGB: FLAMES-GIRAFFE spectra of a large sample of low-mass Bulge stars [PDF]

open access: yes, 2011
Context: A small number of K-type giants on the red giant branch (RGB) is known to be very rich in lithium (Li). This fact is not accounted for by standard stellar evolution theory.
Alcalá   +55 more
core   +4 more sources

Theoretical understanding and technical practice of shale oil development in continental faulted basins in eastern China: A case study of Jiyang shale oil

open access: yesYouqi dizhi yu caishoulu
The shale oil in the continental faulted basins in eastern China,represented by Jiyang shale oil,has made a breakthrough in production capacity. However,Jiyang shale oil faces great challenges in achieving high and stable production due to the large ...
YANG Yong   +9 more
doaj   +1 more source

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