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Mostrando ítems 71-80 de 1987
Photochemistry and photophysics of mycosporine-like amino acids and gadusols, nature's ultraviolet screens
(Int Union Pure Applied Chemistry, 2015-10)
Mycosporine-like amino acids (MAAs) and related gadusols are among the most prominent examples of metabolites suggested to act as UV-sunscreens. This review illustrates how experimental and theoretical studies on model ...
Determination of the gelification kinetics of a correction gel of injection profiles by ultraviolet-visible spectroscopy
(Reino Unido, 2020-08-05)
Mature wells in which, for a long time, water injection has been used, as a method of
recovery they reach a point where the water cut increases or remains constant. thus decreasing the recovered hydrocarbon factor; This ...
Doping of polyaniline and derivatives induced by X-ray radiation
(1997-01-01)
Thin films of chemically synthesized polyaniline and poly(o-methoxyaniline) were exposed to ionizing X-ray radiation and characterized by radiation induced conductivity measurements, ultraviolet-visible spectroscopy, ...
Photoacoustic spectroscopy of aromatic amino acids in proteins
(Springer, 2008-02-01)
This paper concerns the use of photoacoustic spectroscopy (PAS) to study the presence of aromatic amino acid in proteins. We examined the aromatic amino acids in six proteins with well-known structures using absorption ...
Photoacoustic spectroscopy of aromatic amino acids in proteins
(Springer, 2008-02-01)
This paper concerns the use of photoacoustic spectroscopy (PAS) to study the presence of aromatic amino acid in proteins. We examined the aromatic amino acids in six proteins with well-known structures using absorption ...
Energy dispersive X-ray diffraction spectroscopy for rapid estimation of calcite in copper ores
(PERGAMON-ELSEVIER SCIENCE LTD, 2009)
This article presents a novel technique for measuring the concentration of calcite in copper ore samples using energy dispersive X-ray diffraction (ED-XRD). The results are compared with ultraviolet fluorescence spectroscopy ...
Reaction of β-carotene with nitrite anion in a homogeneous acid system. An electron paramagnetic resonance and ultraviolet-visible study
(Springer, 2009-06)
Ultraviolet and visible spectroscopy was applied to characterize and to measure the concentration of β-carotene dissolved in a dioxane and water mixture. The reaction of β-carotene in the presence of nitrite anion and acid ...