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Mars Is Poisonous! The Surface Compounds Have Strong Bactericidal Property.
Aug 05, 2017

Is the hope of human beings wanting to find extraterrestrial life on the surface of Mars dashed? A planetary science papers published 5th in the Science report of Nature, which suggests that the Martian surface has a compound called perchlorate, so the Martian surface is either bactericidal or toxic to biological cells. In view of the serious impact of perchlorate on the planet's environment, scientists have also challenged the original habitable nature of Mars.

This time, the University of Edinburgh scientist Jenny Ward grieves and Charles cook analyzed the potential activity of perchlorate and its effect on the viability of Bacillus subtilis, a common pollutant in spacecraft.

The team found that magnesium perchlorate, irradiated by short-wave UV rays, would produce bactericidal effects, similar to the surface conditions of Mars. In addition, if perchlorate concentrations are similar to those of the Martian surface weathering layer, such as dust, soil, and gravel, the nutrient cells of Bacillus subtilis will lose their viability within a few minutes of such conditions as Mars.

The team also suggested that the two other components of the Martian surface, iron oxides and hydrogen peroxide, could kill cells 10.8 times times more than pure perchlorate under the combined effects of perchloric acid.

While it has been suspected that the Martian surface has been toxic for some time, there has been a lack of important evidence. The new findings show that the Martian surface is highly toxic to cells, caused by the "toxic cocktail" of oxidants, iron oxides, perchlorate and UV rays.

Planetary scientists say the findings are important for planetary protection, such as "dealing with potential pollution from Mars by machines and humans".