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BACKGROUND
Helicobacter pylori has been strongly associated with chronic gastritis, peptic and duodenal ulcers, and it is a risk factor for gastric cancer. Three major virulence factors of H. pylori have been described: the vacuolating toxin (VacA), the cytotoxin-associated gene product (CagA) and the adhesion protein BabA2. Since considerable geographic… (More)

- Mario Atance, José Luis Cortés
- 1997

A general discussion of the renormalization of the quantum theory of a scalar field as an effective field theory is presented. The renormal-ization group equations in a mass independent renormalization scheme allow to identify the possibility to go beyond the renormalizable φ 4 theory without losing its predictive power. It is shown that there is a minimal… (More)

- Mario Atance, José Luis Cortés
- 1996

The structure of the renormalization group equations for the low energy effective theory of gravity coupled to a scalar field is presented. An approximate solution to these equations with a finite number of independent renormalized parameters can be found when the mass scale characteristic of the fluctuations in the geometry is much smaller than the Planck… (More)

- Mario Atance, José Luis Cortés
- 2008

The general structure of the renormalization group equations for the low energy effective field theory formulation of pure gravity is presented. The solution of these equations takes a particular simple form if the mass scale of the effective theory is much smaller than the Planck mass (a possibility compatible with the renormalization of the effective… (More)

- Mario Atance, José Luis Cortés, Igor G Irastorza
- 1997

We show that it is possible to find an extension of the matter content of the standard model with a unification of gauge and Yukawa couplings reproducing their known values. The perturbative renor-malizability of the model with a single coupling and the requirement to accomodate the known properties of the standard model fix the masses and couplings of the… (More)

- José Luis Cortés, Elena Rivas, Luis Velázquez
- 1996

The technique of extended dualization developed in this paper is used to bosonize quantized fermion systems in arbitrary dimension D in the low energy regime. In its original (minimal) form, dualization is restricted to models wherein it is possible to define a dynamical quantized conserved charge. We generalize the usual dualization prescription to include… (More)

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