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Integration of stress produced reactive oxygen species in the stomatal regulati...

Article Addendum ; Reactive oxygen species (ROS) have been repeatedly implicated as cellular second messengers important in the modulation of almost every ontogenic phase of plant development, from seedling to cell death. In all of these processes, ROS production and detoxification are highly regulated and its levels are kept under tight control, in order to achieve the desired effect at the cellular or plant ...

Adsorption of Si and C atoms over SiC (111) surfaces

In this work, using Density Functional, Hartree-Fock and Extended Hückel Theories together with the supercell and cluster model approaches, we present our preliminary results for the simulation of the adsorption of Si and C atoms over the (111) SiC surfaces as well as the torsion of SiC molecules at that surfaces. Our results shown that, before and after the adsorption, the cubic structure are the most stable o...

A fucan from the brown seaweed Spatoglossum schröederi inhibits Chinese hamster...

Fucans, a family of sulfated polysaccharides present in brown seaweed, have several biological activities. Their use as drugs would offer the advantage of no potential risk of contamination with viruses or particles such as prions. A fucan prepared from Spatoglossum schröederi was tested as a possible inhibitor of cell-matrix interactions using wild-type Chinese hamster ovary cells (CHO-K1) and the mutant type ...

Report on a visceral and cutaneous leishmaniases focus in the town of Jequié, S...

Restriction in the repertoire of detectable autoantibodies in polyclonal B cell...

Despite the existence of erythrocyte-autoreactive B cells in normal animals, erythrocyte-autoantibodies could not be detected during polyclonal B-cell activation (PBA) both in patients with visceral leishmaniasis and in bacterial lipopolysacharide (LPS) - injected mice. The failure to detect these autoantibodies in mice with PBA di not seem to be due to suppressor-cell activity, since (1) transfer of spleen cel...