Friday, November 23, 2007

Pain When Eating And Swollen Lymph Nodes

LIMA "VEGETATION SMART" FOR AIR POLLUTION

Lima, in November. 23 .- The high degree of pollution affecting Lima by carbon monoxide, sulfuric acid and the product launch air strange, is disappearing lichen vegetation was observed until a decade ago in the houses and trees, according to a study.
Doraliza Tovar Torres, a biologist and director of the General Studies Program, University of Vienna, said that lichens are a physiological example of convergent evolution that enabled them to develop a large ecological plasticity and colonize various substrates.
Thus, in this regard the fungus is responsible for protecting the algae from the direct sunshine and provide water and minerals, while the alga of photosynthesis (air purification), while providing food to the fungus and vitamins, he said.
Worldwide lichens are very useful as food and for making dyes, antibiotics, and perfumes.
However, even though they are adapted to live in adverse environmental conditions, are extremely sensitive to sulfur dioxide, the main pollutant of the atmosphere of Lima, he said.
precisely this degree of contamination decreases the number of species by progressive destruction of this peculiar symbiosis.
also have metabolites that exhibit properties and photoprotective filter UVA and UVB.
also for their sensitivity to sulfur dioxide, air pollutant, can be used as biomarkers of environmental pollution in general.
He noted that the Peruvian capital is contaminated because Peru has one of the worst and most toxic fuels in Latin America. We are Venezuela, India, Uruguay and Brazil.
This issue and other issues Lichenology will be debated at the VIII International lichenologists, organized by Vienna University from 26 to 30 of this month.
The meeting will present the results of research in the areas of Biogeography, Bioindicators, molecular biology, biotechnology, ecology, floristics, Chemical Systematics and Taxonomy.
The agenda considers twelve conferences, 23 oral presentations and 35 posters, exhibitors by Argentina, Austria, Brazil, Colombia, Costa Rica, Cuba, Chile, Ecuador, Spain, Mexico, Panama, Peru, Switzerland, Thailand, United States States and Venezuela.

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