The Origins of Life:

Discussion in 'Astronomy, Exobiology, & Cosmology' started by paddoboy, Jun 16, 2016.

  1. paddoboy Valued Senior Member

    Messages:
    27,543
    http://www.spacedaily.com/reports/L...w_energy_electron_reactions_in_space_999.html

    Life's origins may result from low-energy electron reactions in space
    by Staff Writers
    Wellesley MA (SPX) Jun 16, 2016

    Please Register or Log in to view the hidden image!

    The interaction of high-energy cosmic rays with matter produces copious numbers of low-energy electrons. Arumainayagam's results demonstrate that low-energy electron and UV irradiation of methanol ices yield essentially the same reaction products.
    Wellesley College professor Chris Arumainayagam has opened the American Astronomical Society (AAS) national conference in San Diego, Calif with a discussion about how the earliest building blocks of life may have been produced when low-energy (< 20 eV) electrons interact with cosmic (interstellar, planetary, and cometary) ices.

    His recently published results suggest that low-energy, electron-induced condensed phase reactions may contribute to the interstellar synthesis of prebiotic molecules previously thought to form exclusively via UV photons.

    In the simplest possible terms, his work is consistent with the idea that we really do come from stardust and is relevant to the first unambiguous detection of glycine in a comet, reported in May 2016. Arumainayagam is the only professor representing a liberal arts college at the press briefing.
    more at link.....
     
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. timojin Valued Senior Member

    Messages:
    3,252
    Did this professor read the work done in the 1950 in a lab experiment , I suppose the professor was not born yet, so it is new for him. The experiment produced more the Glycine, there were several amino acids produced . I just don't have the lead on hand , I am sure wki have that printed .
     
  4. Google AdSense Guest Advertisement



    to hide all adverts.
  5. paddoboy Valued Senior Member

    Messages:
    27,543

    Please Register or Log in to view the hidden image!


    You do realise that this is the year 2016???

    Please Register or Log in to view the hidden image!

     
  6. Google AdSense Guest Advertisement



    to hide all adverts.
  7. paddoboy Valued Senior Member

    Messages:
    27,543
    Here's the research paper:

    http://www.sciencedirect.com/science/article/pii/S0039602816001084

    The role of low-energy (≤ 20 eV) electrons in astrochemistry


    Abstract
    UV photon-driven condensed phase cosmic ice reactions have been the main focus in understanding the extraterrestrial synthesis of complex organic molecules. Low-energy (≤ 20 eV) electron-induced reactions, on the other hand, have been largely ignored. In this article, we review studies employing surface science techniques to study low-energy electron-induced condensed phase reactions relevant to astrochemistry. In particular, we show that low-energy electron irradiation of methanol ices leads to the synthesis of many of the same complex molecules formed through UV irradiation. Moreover, our results are qualitatively consistent with the hypothesis that high-energy condensed phase radiolysis is mediated by low-energy electron-induced reactions. In addition, due to the numbers of available low-energy secondary electrons resulting from the interaction of high-energy radiation with matter as well as differences between electron- and photon-induced processes, low-energy electron-induced reactions are perhaps as, or even more, effective than photon-induced reactions in initiating condensed-phase chemical reactions in the interstellar medium. Consequently, we illustrate a need for astrochemical models to include the details of electron-induced reactions in addition to those driven by UV photons. Finally, we show that low-energy electron-induced reactions may lead to the production of unique molecular species that could serve as tracer molecules for electron-induced condensed phase reactions in the interstellar medium.

    Highlights



    Review of low-energy (≤ 20 eV) electron-induced condensed matter reactions relevant to astrophysical phenomena


    Insight into the synthesis of prebiotic molecules in cosmic ices and found near star-forming regions of the universe


    Studies such as these may ultimately help us better understand the initial stages of the genesis of life.
     

Share This Page