Júlio César Fabris

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We investigated the identity and genetic diversity of more than 100 isolates belonging to Phyllosticta (teleomorph Guignardia), with particular emphasis on Phyllosticta citricarpa and Guignardia mangiferae s.l. occurring on Citrus. Phyllosticta citricarpa is the causal agent of Citrus Black Spot and is subject to phytosanitary legislation in the EU. This(More)
The surface gravity for the extreme Reissner-Nordström black hole is null suggesting that it has a zero temperature. The direct evaluation of the Bogolubov's coefficients indicates that the temperature of the extreme black hole is ill definite: The Bogolubov's coefficients obtained by performing the usual analysis of a collapsing model of a thin shell do(More)
The type Ia supernovae observational data are used to estimate the parameters of a cosmological model with cold dark matter and the Chaplygin gas. This exotic gas, which is characterized by a negative pressure varying with the inverse of density, represents in this model the dark energy responsible for the acceleration of the Universe. The Chaplygin gas(More)
We study Einstein gravity minimally coupled to a scalar field in a static, spherically symmetric space-time in four dimensions. Black hole solutions are shown to exist for a phantom scalar field whose kinetic energy is negative. These " scalar black holes " have an infinite horizon area and zero temperature T H and are termed " cold black holes " (CBHs).(More)
We study Einstein gravity coupled to a massless scalar field in a static spherically symmetric space-time in four dimensions. Black hole solutions exist when the kinetic energy of the scalar field is negative, that is, for a phantom field. These " scalar black holes " have an infinite horizon area and zero temperature. They are related through a conformal(More)