I guess many of you are aware of
extremophiles. However, let me give you a brief description. Extremophiles are
super-hot super-small guys that can survive in extreme environmental conditions
from hot springs, deep thermal vents, and volcanoes to the frozen waters in the
Arctic and Antarctica. These tiny weenie little things can overcome these
extreme stressful living conditions and can survive even at high temperatures (thermophiles),
high salinity (halophiles), and high pressures (barophiles).
I recently read an article about an
extremophile that has been recently added to the list of the newly discovered
species Pyrolobus
fumarii Strain 121, which is a super-hot thermopile. It
seems that this guy loves to live a life in the hell. It is the first ever
known living thing that is found to live in the hottest conditions on earth
(about 121°C). 

It has been found deep down in a thermal vent
in the Pacific Ocean.
One of the unique features of this organism is that
it feeds on iron. Usually, other microbes metabolize food by breaking down the
organic matter and transfer electrons to a network of molecules to produce
carbon dioxide. Usually, this network of molecules is found in the cell
membrane. When electrons flow through these molecules, an electron transport
chain (ETC) is thus observed in the cell membrane and inside the cell. But,
this guy seems to be a little different from the others. This microbe seems to
deliver electrons to the iron molecules that are found outside the cell, that
is, the environment surrounding the cell. Usually places such as thermal vents seem be iron- and sulfur-rich. Thus, an ETC occurs outside the
cell, rather inside the cell.
During an ETC, an electron flow is observed,
thereby creating electricity. However, the electricity generated inside the
cell is not of much use, but we can use these microbes to generate usable
electricity from organic matter, since the electron flow is outside the cell.
Also, these microbes can be used to transfer
electrons to radioactive waste materials such as uranium. Therefore, when we
put these microbes in the water that is radioactive contaminate, they help to
drop down the uranium levels in the water, and even in soils of the areas that
are radioactive contaminated.

2 comments:
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