The Experts below are selected from a list of 14757 Experts worldwide ranked by ideXlab platform
Peter J. Hodge - One of the best experts on this subject based on the ideXlab platform.
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Extraterrestrial prebiotic molecules: photochemistry vs. radiation chemistry of interstellar ices
Chemical Society Reviews, 2019Co-Authors: Chris R. Arumainayagam, Robin T. Garrod, Jyoti S. Campbell, Chris M. Nowak, Michael R. Arumainayagam, Jingqiao Wang, Michael Boyer, Peter J. HodgeAbstract:In 2016, unambiguous evidence for the presence of the amino acid glycine, an important prebiotic molecule, was deduced based on in situ mass-spectral studies of the coma surrounding cometary ice. This finding is significant because comets are thought to have preserved the icy grains originally found in the interstellar medium prior to solar system formation. Energetic processing of cosmic ices via photochemistry and radiation chemistry is thought to be the dominant mechanism for the extraterrestrial synthesis of prebiotic molecules. Radiation chemistry is defined as the “study of the chemical changes Produced by the absorption of radiation of sufficiently high energy to Produce Ionization.” Ionizing radiation in cosmic chemistry includes high-energy particles (e.g., cosmic rays) and high-energy photons (e.g., extreme-UV). In contrast, photochemistry is defined as chemical processes initiated by photon-induced electronic excitation not involving Ionization. Vacuum-UV (6.2–12.4 eV) light may, in addition to photochemistry, initiate radiation chemistry because the threshold for producing secondary electrons is lower in the condensed phase than in the gas phase. Unique to radiation chemistry are four phenomena: (1) production of a cascade of low-energy ( 10 eV photons. Because a primary objective of chemistry is to provide molecular-level mechanistic explanations for macroscopic phenomena, our ultimate goal in this review paper is to critically evaluate our current understanding of cosmic ice energetic processing which likely leads to the synthesis of extraterrestrial prebiotic molecules.
Chris R. Arumainayagam - One of the best experts on this subject based on the ideXlab platform.
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Extraterrestrial prebiotic molecules: photochemistry vs. radiation chemistry of interstellar ices
Chemical Society Reviews, 2019Co-Authors: Chris R. Arumainayagam, Robin T. Garrod, Jyoti S. Campbell, Chris M. Nowak, Michael R. Arumainayagam, Jingqiao Wang, Michael Boyer, Peter J. HodgeAbstract:In 2016, unambiguous evidence for the presence of the amino acid glycine, an important prebiotic molecule, was deduced based on in situ mass-spectral studies of the coma surrounding cometary ice. This finding is significant because comets are thought to have preserved the icy grains originally found in the interstellar medium prior to solar system formation. Energetic processing of cosmic ices via photochemistry and radiation chemistry is thought to be the dominant mechanism for the extraterrestrial synthesis of prebiotic molecules. Radiation chemistry is defined as the “study of the chemical changes Produced by the absorption of radiation of sufficiently high energy to Produce Ionization.” Ionizing radiation in cosmic chemistry includes high-energy particles (e.g., cosmic rays) and high-energy photons (e.g., extreme-UV). In contrast, photochemistry is defined as chemical processes initiated by photon-induced electronic excitation not involving Ionization. Vacuum-UV (6.2–12.4 eV) light may, in addition to photochemistry, initiate radiation chemistry because the threshold for producing secondary electrons is lower in the condensed phase than in the gas phase. Unique to radiation chemistry are four phenomena: (1) production of a cascade of low-energy ( 10 eV photons. Because a primary objective of chemistry is to provide molecular-level mechanistic explanations for macroscopic phenomena, our ultimate goal in this review paper is to critically evaluate our current understanding of cosmic ice energetic processing which likely leads to the synthesis of extraterrestrial prebiotic molecules.
Michael Boyer - One of the best experts on this subject based on the ideXlab platform.
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Extraterrestrial prebiotic molecules: photochemistry vs. radiation chemistry of interstellar ices
Chemical Society Reviews, 2019Co-Authors: Chris R. Arumainayagam, Robin T. Garrod, Jyoti S. Campbell, Chris M. Nowak, Michael R. Arumainayagam, Jingqiao Wang, Michael Boyer, Peter J. HodgeAbstract:In 2016, unambiguous evidence for the presence of the amino acid glycine, an important prebiotic molecule, was deduced based on in situ mass-spectral studies of the coma surrounding cometary ice. This finding is significant because comets are thought to have preserved the icy grains originally found in the interstellar medium prior to solar system formation. Energetic processing of cosmic ices via photochemistry and radiation chemistry is thought to be the dominant mechanism for the extraterrestrial synthesis of prebiotic molecules. Radiation chemistry is defined as the “study of the chemical changes Produced by the absorption of radiation of sufficiently high energy to Produce Ionization.” Ionizing radiation in cosmic chemistry includes high-energy particles (e.g., cosmic rays) and high-energy photons (e.g., extreme-UV). In contrast, photochemistry is defined as chemical processes initiated by photon-induced electronic excitation not involving Ionization. Vacuum-UV (6.2–12.4 eV) light may, in addition to photochemistry, initiate radiation chemistry because the threshold for producing secondary electrons is lower in the condensed phase than in the gas phase. Unique to radiation chemistry are four phenomena: (1) production of a cascade of low-energy ( 10 eV photons. Because a primary objective of chemistry is to provide molecular-level mechanistic explanations for macroscopic phenomena, our ultimate goal in this review paper is to critically evaluate our current understanding of cosmic ice energetic processing which likely leads to the synthesis of extraterrestrial prebiotic molecules.
Robin T. Garrod - One of the best experts on this subject based on the ideXlab platform.
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Extraterrestrial prebiotic molecules: photochemistry vs. radiation chemistry of interstellar ices
Chemical Society Reviews, 2019Co-Authors: Chris R. Arumainayagam, Robin T. Garrod, Jyoti S. Campbell, Chris M. Nowak, Michael R. Arumainayagam, Jingqiao Wang, Michael Boyer, Peter J. HodgeAbstract:In 2016, unambiguous evidence for the presence of the amino acid glycine, an important prebiotic molecule, was deduced based on in situ mass-spectral studies of the coma surrounding cometary ice. This finding is significant because comets are thought to have preserved the icy grains originally found in the interstellar medium prior to solar system formation. Energetic processing of cosmic ices via photochemistry and radiation chemistry is thought to be the dominant mechanism for the extraterrestrial synthesis of prebiotic molecules. Radiation chemistry is defined as the “study of the chemical changes Produced by the absorption of radiation of sufficiently high energy to Produce Ionization.” Ionizing radiation in cosmic chemistry includes high-energy particles (e.g., cosmic rays) and high-energy photons (e.g., extreme-UV). In contrast, photochemistry is defined as chemical processes initiated by photon-induced electronic excitation not involving Ionization. Vacuum-UV (6.2–12.4 eV) light may, in addition to photochemistry, initiate radiation chemistry because the threshold for producing secondary electrons is lower in the condensed phase than in the gas phase. Unique to radiation chemistry are four phenomena: (1) production of a cascade of low-energy ( 10 eV photons. Because a primary objective of chemistry is to provide molecular-level mechanistic explanations for macroscopic phenomena, our ultimate goal in this review paper is to critically evaluate our current understanding of cosmic ice energetic processing which likely leads to the synthesis of extraterrestrial prebiotic molecules.
Jyoti S. Campbell - One of the best experts on this subject based on the ideXlab platform.
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Extraterrestrial prebiotic molecules: photochemistry vs. radiation chemistry of interstellar ices
Chemical Society Reviews, 2019Co-Authors: Chris R. Arumainayagam, Robin T. Garrod, Jyoti S. Campbell, Chris M. Nowak, Michael R. Arumainayagam, Jingqiao Wang, Michael Boyer, Peter J. HodgeAbstract:In 2016, unambiguous evidence for the presence of the amino acid glycine, an important prebiotic molecule, was deduced based on in situ mass-spectral studies of the coma surrounding cometary ice. This finding is significant because comets are thought to have preserved the icy grains originally found in the interstellar medium prior to solar system formation. Energetic processing of cosmic ices via photochemistry and radiation chemistry is thought to be the dominant mechanism for the extraterrestrial synthesis of prebiotic molecules. Radiation chemistry is defined as the “study of the chemical changes Produced by the absorption of radiation of sufficiently high energy to Produce Ionization.” Ionizing radiation in cosmic chemistry includes high-energy particles (e.g., cosmic rays) and high-energy photons (e.g., extreme-UV). In contrast, photochemistry is defined as chemical processes initiated by photon-induced electronic excitation not involving Ionization. Vacuum-UV (6.2–12.4 eV) light may, in addition to photochemistry, initiate radiation chemistry because the threshold for producing secondary electrons is lower in the condensed phase than in the gas phase. Unique to radiation chemistry are four phenomena: (1) production of a cascade of low-energy ( 10 eV photons. Because a primary objective of chemistry is to provide molecular-level mechanistic explanations for macroscopic phenomena, our ultimate goal in this review paper is to critically evaluate our current understanding of cosmic ice energetic processing which likely leads to the synthesis of extraterrestrial prebiotic molecules.