Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Bacteria in outer space exchange genes more often

23.02.2007
Studying of bacteria cosmic transformation is very important for space flight safety. It is necessary to know the methods to maintain cosmonauts’ immunity, what drugs should be offered to them, and what new biostable materials should be developed for spaceship compartments and equipment.

Researchers have investigated the peculiarities of microorganisms’ physiology and behavior in space on the “Mir” orbiting space station, and found that bacteria change significantly in extraterrestrial conditions. In 2005, experiments on board the “Photon 2” space vehicle launched batches of bacteria into space. Among them there were several cultures of bacilli, streptomycetes and Escherichia coli, selected not at random, but because they differ from each other in terms of their physiology, biochemistry and genetics, thus providing a more comprehensive view on bacteria behavior in general.

In orbit, living organisms face not only the lack of gravitation, but also cosmic radiation presence. Bacteria in space become more aggressive, and can “eat” spaceship components. This happens because microorganisms start producing enzymes unusual for them in terrestrial conditions, which destroy structural materials. It is not improbable that bacteria become aggressive not only towards materials but also provoking unexpected diseases in humans. Cosmonauts already experience immunodeficiency problems in flight, which makes them more vulnerable.

Observations on board the “Mir” and “Photon 2” proved that microorganisms change even during short-term flights of 12-14 days. For example, streptomycetes changed their appearance (size, shape and outline of the colonies’ surface). The in-depth analysis also revealed genetic modifications of microorganisms. The number of their mutations does not increase, but some genes are disrupted. Some genes that are “dormant” on the Earth, begin to work, which generate the enzymes which damage structural materials.

... more about:
»Change »genes »materials

Fortunately, when bacteria return to the Earth, they lose their aggressiveness, with changes that took place in orbit are reversible. Otherwise, similar problems could be expected on the Earth: destruction of materials and diseases in humans.

Nadezda Markina | alfa
Further information:
http://www.informnauka.ru

Further reports about: Change genes materials

More articles from Life Sciences:

nachricht Decoding the genome's cryptic language
27.02.2017 | University of California - San Diego

nachricht New risk factors for anxiety disorders
24.02.2017 | Julius-Maximilians-Universität Würzburg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Safe glide at total engine failure with ELA-inside

On January 15, 2009, Chesley B. Sullenberger was celebrated world-wide: after the two engines had failed due to bird strike, he and his flight crew succeeded after a glide flight with an Airbus A320 in ditching on the Hudson River. All 155 people on board were saved.

On January 15, 2009, Chesley B. Sullenberger was celebrated world-wide: after the two engines had failed due to bird strike, he and his flight crew succeeded...

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

New pop-up strategy inspired by cuts, not folds

27.02.2017 | Materials Sciences

Sandia uses confined nanoparticles to improve hydrogen storage materials performance

27.02.2017 | Interdisciplinary Research

Decoding the genome's cryptic language

27.02.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>