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The biological value of vitamin C rests mainly on its ability to protect cells against oxidative stress. In addition, vitamin C functions as an enzymatic co-factor and induces differentiation of several cell lineages. To accomplish most of these roles, vitamin C must be efficiently incorporated i...

In this chapter we present a theoretical study of magnetic ground states, domain walls and magnetization reversal process in nanomagnets with cylindrical symmetry. It is well known that macroscopic ferromagnets are organized in domains, and nearest domains are separated by domain walls, whose typ...

Paleoclimate research in the Andean region south of 40° S is key to understanding the climatic evolution of the mid-latitudes of the Southern Hemisphere. Studies in this region are of pivotal importance for determining the mechanisms responsible of climate changes at regional, hemispheric, and gl...

Over the past few years, some preventive measures have been adopted for restricting the growth of human impact on the terrestrial environment and to limit gaseous emissions into the atmosphere, (e.g., the Vienna Convention for the Protection of the Ozone Layer, 1985, and the Montreal Protocol, 19...