Buscar
Mostrando ítems 31-40 de 3935
Effect of the interfacial area measurement parameters on the push-out strength between fiber post and dentin
(Elsevier B.V., 2014-04-01)
Purpose: To verify the influence of different instruments and operators on the bonding interfacial area and on the push-out bond strength values.Material and methods: Fifteen anterior human teeth (n=15) were selected, ...
Corporate Credit Spreads and the Sovereign Ceiling in Latin America
(Taylor & Francis, 2017-02-28)
We exploit a panel of 72 US dollar-denominated bonds issued by Latin American publicly listed firms between 1996 and 2004, a period of regional financial crises, to answer the following three questions: (1) Is sovereign ...
Study of the Effects of Intramolecular and Intermolecular Hydrogen-Bonding Systems on the Polymerization of Amide-Containing Benzoxazines
(Wiley VCH Verlag, 2017-02-14)
Pure para and ortho position amide benzoxazines, pHBA-a and oHBA-a, are synthesized. The hydrogen bonding interactions occurring in pHBA-a and oHBA-a are studied by Fourier transform infrared (FT-IR) spectroscopy and proton ...
The impact of the financial crisis on the long-range memory of European corporate bond and stock markets
(Springer, 2018-02)
This paper investigates the presence of long memory in corporate bond and stock indices of six European Union countries from July 1998 to February 2015. We compute the Hurst exponent by means of the DFA method and using a ...
Bond risk premia and the return forecasting factor
(De Gruyter, 2020-02)
The return forecasting factor is a linear combination of forward rates that seems to predict 1-year excess bond returns of bond of all maturities better than traditional measures obtained from the yield curve. If this ...
Comparison of halogen bonding and van der Waals and π-π Inter-actions in 4,5-dibromo-2-hexyl-oxyphenol
(Wiley Blackwell Publishing, Inc, 2009-04)
The title compound, C12H16BrO2, is an inter-esting case of a simple organic mol-ecule making use of five different types of intra- and inter-molecular inter-actions (viz. conventional and nonconventional hydrogen bonds, ...
Psychoneonatology: results of a new observation scale of the bond mother-baby in incubator
(Monduzzi Editore, 2010)
The advances in neonatal medicine enabled the reduction of morbi-mortality. Long periods of confinement and the entrance of parents in the NICU, created new contexts where the bond mother-baby is developed. In order to ...
Photoredox catalytic activation of carbon-halogen bonds: C-H functionalization reactions under visible light
(Wiley-VCH, 2018)
In the past decade, visible light mediated photoredox catalytic methods have gained enormous attention for the activation of challenging chemical bonds under very mild and ecologically benign conditions. In thisbook chapter, ...
Electronic structure and effectively unpaired electron density topology in closo -Boranes: Nonclassical three-center two-electron bonding
(American Chemical Society, 2011-07)
This article provides a detailed study of the structure and bonding in closo-borane cluster compounds X2B3H3 (X = BH-, P, SiH, CH, N), with particular emphasis on the description of the electron distribution using the ...
Carbonyl stretch of CH…O hydrogen-bonded methyl acetate in supercritical trifluoromethane
(American Institute of Physics, 2020-08-24)
Infrared spectroscopy in the gas phase was used to study the formation reaction of the CH⋯O hydrogen bonding complex involving the CH group of trifluoromethane, as a hydrogen donor, and the carbonyl group of methyl acetate, ...