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Formulas for the Euler-Mascheroni constant
(Unión Matemática Argentina, 2009-12)
We give several integral representation for the Euler- Mascheroni constant using a combinatorial identity for sum_{n=1}^N 1/(n+x)(n+y). The derivation fo this combinatorial identity is done in an elementary way.
On inflation and variation of the strong coupling constant
(World Scientific, 2007-12)
Variation of constants in the very early universe can generate inflation. We consider a scenario where the strong coupling constant was changing in time and where the gluon condensate underwent a phase transition ending ...
The Equivariant Second Yamabe Constant
(Springer, 2019-01)
For a closed Riemannian manifold of dimension n≥ 3 and a subgroup G of the isometry group, we define and study the G-equivariant second Yamabe constant and obtain some results on the existence of G-invariant nodal solutions ...
An approximation formula for Euler-Mascheroni's constant
(Unión Matemática Argentina, 2016-01)
A fast approximation formula for Euler–Mascheroni’s constant based on a certain integral due to Peter Borwein is given. This asymptotic formula for γ involves harmonic numbers, ln 2 and rational numbers whose denominators ...
Erratum: Analysis of isotope effects in NMR one-bond indirect nuclear spin-spin coupling constants in terms of localized molecular orbitals
(Royal Society Of Chemistry, 2010-12)
The numerical values given for the reduced coupling constants, KX–H (in 1018 J 1 T2 ), and for the changes in the reduced coupling constants, DKX–H (in 1018 J 1 T2 ), in Tables 2 to 7 and Figures 1 to 4 have to be multiplied ...
Time variation of fundamental constants in nonstandard cosmological models
(American Physical Society, 2017-10)
In this work we have studied the lithium problem in nonstandard cosmological models. In particular, by using the public code alterbbn, we have included in the computation of the primordial light nuclei abundances, the ...
Large long-range F-F indirect spin-spin coupling constants. Prediction of measurable F-F couplings over a few nanometers
(American Chemical Society, 2004-05)
Large long-range indirect nuclear spin coupling constants are of great interest for quantum computers. But they are rarely observed and are usually considered very small, unless the coupled nuclear spins are proximate in ...
QSPR study of the Henry's law constant for heterogeneous compounds
(Institution of Chemical Engineers, 2020-02)
We establish a Quantitative Structure-Property Relationships study on the Henry's law constant of 530 heterogeneous compounds, including pesticides, solvents, aromatic hydrocarbons and persistent pollutants. The multivariable ...
Rate constants of quenching of the fluorescence of pterins by the iodide anion in aqueous solution
(Elsevier Science, 2012-07)
The fluorescence of various pterins (6-methylpterin, 6-hydroxymethylpterin, 6-formylpterin, and 6-carboxypterin) was quenched using iodide in neutral, aerated neutral phosphate buffer. Stern-Volmer plots and the fluorescence ...
Adsorption micro calorimeter : Design and electric calibration
(Springer, 2009-08-06)
In this work, it is described an innovative heat flux micro calorimeter Tian-Calvet type designed to measure adsorption heats and reactions as well as adsorption isotherms. It consists in an adsorption instrument for ...