We give general overview of a novel approach, recently developed by us, to address the issue black hole information paradox. This alternative viewpoint is based on theories involving modifications of standard quantum theory, known as spontaneous dynamical state reduction or wave-function collapse models which were historically developed to overcome the notorious foundational problems of quantum mechanics known as the measurement problem. We show that these proposals, when appropriately adapted and refined for this context, provide a self-consistent picture where loss of information in the evaporation of black holes is no longer paradoxical.

There is a persistent state of confusion regarding the nature of the Unruh effect. We will argue that, in contrast to some interpretations thereof, the effect does not represent any novel physics and that, by its very nature, the effect is fundamentally unmeasurable in all experiments of the kind that have been contemplated until now. Also, we discuss what aspects connected with this effect one might consider as possibilities to be explored empirically and what their precise meaning may be regarding the issue at hand.

The addition of antioxidants to broiler diets has been shown to enhance their antioxidant status. Since boldo (Peumus boldus Mol.) leaves contain highly antioxidant molecules, a dried extract of boldo (DEB) was added to broiler diets to improve "in vivo" antioxidant tissue status and to favor animal growth. A DEB standardized for antioxidant content was prepared and added to poultry diets at three different levels (low-DELB, medium-DEMB, and high-DEHB) for a period of 6 weeks. A single negative control (no added antioxidant) and one positive control (supplementation with 200 mg/kg vitamin E) were used. Plasma antioxidant capacity (PAC), thiol content (GHS), and basal and induced lipoperoxidation of liver, leg and breast tissues were determined in birds at 2, 4, and 6 weeks of age. PAC increased with chicken age until week 6, but was unaffected by DEB addition at any level. However, DEB increased hepatic GSH content. No data indicated that DEB improved the resistance against induced lipoperoxidation in the assayed tissues. DEB contains compounds exhibiting high antioxidant activity "in vivo", as evidenced by the increase in liver thiol content.Regarding broiler performance, no differences in poultry body weight and feed consumption were detected during the assay.

Facultad de Agronomía e Ingeniería Forestal/Animal Science Department/Pontificia Universidad Católica de Chile/Av. Vicuña Mackenna 4860, Macul, Santiago, Chile. 2 Facultad de Ciencias Químicas y Farmaceúticas, Universidad de Chile. Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile. * Corresponding autor: mafellen@uc.cl __________________________________________________________________________________

We consider anew some puzzling aspects of the equivalence of the quantum field theoretical description of bremsstrahlung from the inertial and accelerated observer's perspectives. More concretely, we focus on the seemingly paradoxical situation that arises when noting that the radiating source is in thermal equilibrium with the thermal state of the quantum field in the wedge in which it is located, and thus its presence does not change there the state of the field, while it clearly does not affect the state of the field on the opposite wedge. How then is the state of the quantum field on the future wedge changed, as it must in order to account for the changed energy-momentum tensor there? This and related issues are carefully discussed.

We search numerically for asymptotically flat, static and spherically symmetric black hole configurations in a system which consists of a real scalar field non-minimally coupled to gravity. This issue has been analysed previously, assuming external considerations to the theory which, as we explain, limit the generality of the analysis. We present a method that is useful for obtaining initial conditions for numerical analysis. Our results narrow the range in which one can find black hole configurations without considering any requirements external to the theory.

We prove a general no-hair theorem which is then applied to the case of a theory that consists of a number of complex scalar fields minimally coupled to gravity that vary harmonically with time and has an arbitrary potential. This establishes that in the spherically symmetric case there are no black hole analogues of the regular boson star configurations.