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The double-layered chemical structure in DB white dwarfs
(EDP Sciences, 2004-04)
which is characterized by a pure helium envelope atop an intermediate remnant shell rich in helium, carbon and oxygen, is expected for pulsating DB white dwarfs, assuming that they are descendants of hydrogen-deficient PG ...
Synthesis and structural characterization of new macrocyclic ester. study as an immobilization agent for determination of lead by anodic stripping voltammetry
(International Journal of Electrochemical Science, 2019)
On the formation of hydrogen-deficient low-mass white dwarfs
(EDP Sciences, 2020-06)
Context. Two of the possible channels for the formation of low-mass (M∗≲ 0.5 M· ) hydrogen-deficient white dwarfs are the occurrence of a very-late thermal pulse after the asymptotic giant-branch phase or a late helium-flash ...
Morphological and histochemical characterization of the pectoral fin muscle of the stripped weakfish, Cynoscion guatucupa
(Wiley Blackwell Publishing, Inc, 2015-04)
The fibres of superficial and deep abductor muscles of the pectoral fins of the stripped weakfish, Cynoscion guatucupa have been studied using histochemical techniques: succinic dehydrogenase (SDH) for mitochondria, periodic ...
New nonadiabatic pulsation computations on full PG1159 evolutionary models: the theoretical GW Vir instability strip revisited
(EDP Sciences, 2006-10)
Aims. We reexamine the theoretical instability domain of pulsating PG 1159 stars (GW Vir variables). Methods. We performed an extensive g-mode stability analysis on PG 1159 evolutionary models with stellar masses ranging ...