Asymmetric Vacuum UV photolysis of the Amino Acid Leucine in the Solid State

Meierhenrich, Uwe J.; Nahon, Laurent; Alcaraz, Christian; Bredehöft, Jan Hendrik; Hoffmann, S. V.; Barbier, Bernard; Brack, Andrè

doi:10.1002/anie.200501311

Cited by 127 publications

(93 citation statements)

References 39 publications

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“…It has been reported that an asymmetric (i.e. a chiral electromagnetic field) vacuum UV photolysis of a racemic mixture of leucine in the solid-state results in the production of an enantiomeric excess of one of the forms of the amino acid (Meierhenrich et al 2005). Moreover, enantiomeric excesses can be detected when amino acids are directly synthesized within an achiral ice mixture under circularly polarized light (CPL), with an enantiomeric excess of up to 2.54% (de Marcellus et al 2011;Modica et al 2014).…”

Section: Interstellar and Cometary Organic Chemistry Simulation Facilmentioning

confidence: 99%

Earth as a Tool for Astrobiology—A European Perspective

et al. 2017

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Scientists use the Earth as a tool for astrobiology by analyzing planetary field analogues (i.e. terrestrial samples and field sites that resemble planetary bodies in our Solar System). In addition, they expose the selected planetary field analogues in simulation chambers to conditions that mimic the ones of planets, moons and Low Earth Orbit (LEO) space conditions, as well as the chemistry occurring in interstellar and cometary ices. This paper reviews the ways the Earth is used by astrobiologists: (i) by conducting planetary field analogue studies to investigate extant life from extreme environments, its metabolisms, adaptation strategies and modern biosignatures; (ii) by conducting planetary field analogue studies to investigate extinct life from the oldest rocks on our planet and its biosignatures; (iii) by exposing terrestrial samples to simulated space or planetary environments and producing a sample analogue to investigate changes in minerals, biosignatures and microorganisms. The European Space Agency (ESA) created a topical team in 2011 to investigate recent activities using the Earth as a tool for astrobiology and to formulate recommendations and scientific needs to improve ground-based astrobiological research. Space is an important tool for astrobiology (see Horneck et al. in Astrobiology, 16:201-243, 2016;Cottin et al., 2017), but access to space is limited. Complementing research on Earth provides fast access, more replications and higher sample throughput. The major conclusions of the topical team and suggestions for the future include more scientifically qualified calls for field campaigns with planetary analogy, and a centralized point of contact at ESA or the EU for the organization of a survey of such expeditions. An improvement of the coordinated logistics, infrastructures and funding system supporting the combination of field work with planetary simulation investigations, as well as an optimization of the scientific return and data processing, data storage and data distribution is also needed. Finally, a coordinated EU or ESA education and outreach program would improve the participation of the public in the astrobiological activities.

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Section: Interstellar and Cometary Organic Chemistry Simulation Facilmentioning

confidence: 99%

Earth as a Tool for Astrobiology—A European Perspective

et al. 2017

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“…Effect of UV circularly polarized light in space (gas phase or ices) has been suggested as an alternative way to induce excesses observed [34]. This hypothesis is being tested by laboratory experiments [35][36][37] but the source of the CPL at the vicinity of the early solar system still needs to be assessed. Chirality has been suggested to also occur in the IOM [38] and in hydroxy acids [39].…”

Section: Diversity Of Organic Compounds In Meteoritesmentioning

confidence: 99%

Organic material in meteorites and the link to the origin of life

Rémusat

2014

BIO Web of Conferences

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Abstract. Life requires specific conditions that have been, so far, only proven to meet on Earth. Though the chemical elements required to form living organism (C, H, N, O, S, etc) are widespread in the universe, the molecules that are crucial for Life, like nucleobases or amino acids, may not be so ubiquitous. The question of the formation of small and complex molecules is highly relevant to understand the process of Life origin. Carbonaceous chondrites are a class of meteorites rich in organic compounds and host potential precursors for the emergence of Life (organic matter and water). They could have been the source of complex molecules on the early Earth. This contribution will describe the main properties of the organic matter recovered from carbonaceous chondrites. However, the isotopic and molecular record of organic compounds is faded by secondary processes that occurred on the parent body of these meteorites. This results in complex signatures that raise multiple questions about the origin of organic compounds in the Solar System.

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“…Nevertheless, the effect of UV circularly polarized light has been suggested to explain the excesses observed [41]. This hypothesis is being tested by laboratory experiments [42][43][44][45][46][47] but the source of the CPL at the vicinity of the early solar system still needs to be assessed.…”

Section: -P4mentioning

confidence: 99%

Organic and volatile elements in the solar system

Rémusat

2011

EPJ Web of Conferences

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Abstract. Chondrites and comets have accreted primitive materials from the early solar system. Those materials include organics, water and other volatile components. The most primitive chondrites and comets have undergone few modifications on their respective parent bodies and can deliver to laboratories components that were present at the origin of the protosolar nebula. Here I present a review of the organic material and volatile components that have been studied in the most primitive chondrites, and the last data from the stardust mission about the cometary record. This paper focuses on materials that can be studied in laboratories, by mass spectrometry, ion probes or organic chemistry techniques.

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Asymmetric Vacuum UV photolysis of the Amino Acid Leucine in the Solid State

Cited by 127 publications

References 39 publications

Earth as a Tool for Astrobiology—A European Perspective

Earth as a Tool for Astrobiology—A European Perspective

Organic material in meteorites and the link to the origin of life

Organic and volatile elements in the solar system

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