Results 1 to 10 of about 77,990 (262)

A characterization of p-bases of rings of constants [PDF]

open access: yesOpen Mathematics, 2013
Abstract We obtain two equivalent conditions for m polynomials in n variables to form a p-basis of a ring of constants of some polynomial K-derivation, where K is a unique factorization domain of characteristic p > 0. One of these conditions involves Jacobians while the other some properties of factors.
Jędrzejewicz Piotr
doaj   +5 more sources

Optical appearance of Einstein-Æther black hole surrounded by thin disk

open access: yesNuclear Physics B, 2022
In Einstein-Æther theory, the Lorentz symmetry is locally broken in the high-energy regime due to the presence of the Æther field. This shall leave significant imprint on astronomical observation.
Hui-Min Wang, Zi-Chao Lin, Shao-Wen Wei
doaj   +1 more source

A successful DFT calculation of carbon-13 NMR chemical shifts and carbon–fluorine spin–spin coupling constants in (η6-fluoroarene)tricarbonylchromium complexes† [PDF]

open access: yesRSC Advances, 2014
Carbon-13 isotropic shielding constants and carbon–fluorine spin–spin coupling constants for fluorobenzene (1), 3-dimethylaminofluorobenzene (2) and 4-dimethylaminofluorobenzene (3) as well as for their tricarbonylchromium complexes (3–6) have been ...
Adam Gryff-Keller   +1 more
doaj   +1 more source

Decoding the Structure of Non-Proteinogenic Amino Acids: The Rotational Spectrum of Jet-Cooled Laser-Ablated Thioproline

open access: yesMolecules, 2021
The broadband rotational spectrum of jet-cooled laser-ablated thioproline was recorded. Two conformers of this system were observed and identified with the help of DFT and ab initio computations by comparison of the observed and calculated rotational ...
Juan Carlos López   +4 more
doaj   +1 more source

Kinetic studies on the reaction between dicyanocobinamide and hypochlorous acid. [PDF]

open access: yesPLoS ONE, 2014
Hypochlorous acid (HOCl) is a potent oxidant generated by myeloperoxidase (MPO), which is an abundant enzyme used for defense against microbes. We examined the potential role of HOCl in corrin ring destruction and subsequent formation of cyanogen ...
Dhiman Maitra   +7 more
doaj   +1 more source

A dual approach to structure constants for K-theory of Grassmannians [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2020
The problem of computing products of Schubert classes in the cohomology ring can be formulated as theproblem of expanding skew Schur polynomial into the basis of ordinary Schur polynomials. We reformulate theproblem of computing the structure constants
Huilan Li, Jennifer Morse, Pat Shields
doaj   +1 more source

Facile synthesis of vinyl esters of aromatic carboxylic acids with participation of 2-chloro-4,6-dimethoxy-1,3,5-triazine [PDF]

open access: yesE3S Web of Conferences, 2023
In this work, the reaction of derivatives of benzoic acid containing substituents in the aromatic ring (1a-o) with 2-chloro-4,6dimethoxy-1,3,5-triazine (4) in the presence of N-methylmorpholine (6) has been synthesized active triazine esters of ...
Parmanov A.   +3 more
doaj   +1 more source

Evaluation of the true-strength characteristics for isotropic materials using ring tensile test

open access: yesNuclear Engineering and Technology, 2021
The paper proposes a technique for reconstructing the true hardening curve of isotropic materials from ring tensile tests. Neutron irradiated 42XNM alloy tensile properties were investigated.
A.S. Frolov, I.V. Fedotov, B.A. Gurovich
doaj   +1 more source

The substituent effects on the 13c chemical shifts of the azomethine carbon atom of n-(phenyl substituted) salycilaldimines [PDF]

open access: yesJournal of the Serbian Chemical Society, 2012
The Hammett correlations between 13C-NMR chemical shifts of the azomethine carbon atom and the corresponding substituent constants for thirtheen Schiff bases were established.
Drmanić Saša Ž.   +3 more
doaj   +1 more source

Influence of Growth Ring Number and Width on Elastic Constants of Poplar

open access: yesBioResources, 2023
The objective of this work was to evaluate the effect of growth ring number (specimens including 2, 4, and 6 rings from the bark) and growth ring width on elastic constants in the radial direction of Populus x canadensis, which has not been revealed ...
Murat Aydın, Tuğba Yılmaz Aydın
doaj   +2 more sources

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