December 2009
In vitro models for antioxidant activity evaluation and some medicinal plants possessing antioxidant properties: An overview
Reactive oxygen species (ROS) are a class of highly reactive molecules derived from the metabolism of oxygen. ROS, including superoxide radicals, hydroxyl radical and hydrogen peroxide molecules are often generated as by products of biological reactions or from exogenous factors. There is extensive evidence to involve ROS in the development of degenerative diseases. Evidence suggests that compounds especially from...
December 2009
Characterization and biodegradation of soil humic acids and preliminary identification of decolorizing actinomycetes at Mitidja plain soils (Algeria)
There are abundance of lignite resources in Algeria, particularly in Mitidja plain soils which is known by its fertility and a rapid disappearance of natural organic matters (NOM). The scanning electron microscopy (SEM) morphologies and optical parameters observed for soil humic acids (SHAs) made them different to the commercial ones. Three of the most active strains of 19 actinomycetes were isolated and...
December 2009
Microalgae: A promising feedstock for biodiesel
Biodiesel is a renewable and environmentally friendly energy source fuel produced through transesterification of plant oils or animal fats with short chain alcohols. The global market for biodiesel has been growing rapidly during the past few years, and it is poised for explosive growth in the next years. However, the lack of oil feedstocks limits the large-scale development of biodiesel to a large extent. Recently,...
December 2009
Conflict and the spread of emerging infectious diseases: Where do we go from here?
This article reports on conflict, peace support operations and spread of emerging infectious diseases as well as factors that potentiate emergence and transmission of infectious diseases in conflict situations and highlights several priority actions for their containment and control. Conflict is a complex system of clash or disagreement, often violent, between two opposing groups or individuals. Conflicts and wars have...
December 2009
Human immunodeficiency virus (HIV) and Mycobacterium tuberculosis: A collaboration to kill
HIV continues to be a serious problem in developing countries. It is estimated that these countries account for about 35% of all reported HIV cases in the world. Most of these countries, which are plagued by poverty and poor sanitation, have begun to see an increase in the number of tuberculosis (TB) infected cases. In decades leading to the 1990s, tuberculosis had been on a decline in the world and was thought to be on...
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