article_snippet: Scientists at the University of Tübingen in Germany found one species of bacteria could dump electrons onto the crystals while another harvested the electrons from Scientists at the University of Tübingen in Germany depending on the amount of sunlight Scientists at the University of Tübingen in Germany received.
article_snippet: One species of bacteria dumped electrons while another harvested  from One species of bacteria depending on levels of sunlight .
article_snippet: Instead, the bacteria scavenge the chemicals the bacteria need to survive by breaking down the hydrocarbon compounds in the coal around the bacteria.
article_snippet: However, iron metabolising bacteria access these electrons through specialized enzymes known as cyctochromes. '
article_snippet: The researchers, whose work is published in the journal Science, incubated a species of purple bacteria called Rhodopseudomonas palustris, which is found in soil, and another bacterium called Geobacter sulfurreducens.
article_snippet: There are a number of species of bacteria that have been found to eat electrons by harvesting electrons from metallic particles and others that spit electrons out.
article_snippet: These bacteria, however, appear to harvest energy directly from the electrons freed as These bacteria grow on the surface of iron minerals.
article_snippet: Rhodopseudomonas palustris (above) harvests electrons to power the metabolic processes inside Rhodopseudomonas palustris cells. 
article_snippet: but These bacteria appear to harvest energy directly from the electrons freed as they grow on the surface of iron minerals as These bacteria grow .
highlights_snippet: One species of bacteria harvested electrons from the mineral and another  dumped electrons back on iron in the mineral at night .
  