Endogenously produced pro-oxidant reactive species are essential to life, being involved in
several biological functions. However, when overproduced (eg due to exogenous stimulation…

Several of the most commonly used methods for in vitro determination of antioxidant capacity
are reviewed in the present paper. The chemical principles of methods based either on …

The biological properties of titanium depend on its surface oxide film. Several mechanical
and chemical treatments have been used to modify the surface morphology and properties of …

The antiradical activity of caffeic acid (1), dihydrocaffeic acid (5), and their corresponding n-alkyl
esters was evaluated by using the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH • ) …

Introduction Resveratrol is a polyphenol found in grapes and red wines. Interest in this
polyphenol has increased due to its pharmacological cardio- and neuroprotective, …

A novel strategy to handle sample and reagent introduction in continuous flow systems is
proposed. Basic features such as the effect of flow cell volume, analytical pathlength and …

Chemical insecticides have been widely used in Brazil for several years. This exposes mosquito
populations to an intense selection pressure for resistance to insecticides. In 1999, the …

In the present work, a rapid and high-throughput Folin-Ciocalteu (FC) reducing capacity assay
adapted to routine/screening analysis was developed. In order to attain a fast FC reducing …

For more than 30 years temephos, an organophosphate insecticide, has been the sole
larvicide used in Brazil in the control of Aedes aegypti. Organophosphates were also used for …

Hexane, chloroform and ethanol extracts of six marine macroalgae (Rhodophyta and
Chlorophyta) from North Ceará coast (Northeast Brazil) were evaluated for antibacterial activity by …