Literatura académica sobre el tema "Prebiotic catalysis"
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Artículos de revistas sobre el tema "Prebiotic catalysis"
Ferris, J. P. "Catalysis and Prebiotic Synthesis". Reviews in Mineralogy and Geochemistry 59, n.º 1 (1 de enero de 2005): 187–210. http://dx.doi.org/10.2138/rmg.2005.59.8.
Texto completoFerris, James P. "Catalysis and prebiotic RNA synthesis". Origins of Life and Evolution of the Biosphere 23, n.º 5-6 (diciembre de 1993): 307–15. http://dx.doi.org/10.1007/bf01582081.
Texto completoJheeta, Sohan y Prakash Joshi. "Prebiotic RNA Synthesis by Montmorillonite Catalysis". Life 4, n.º 3 (5 de agosto de 2014): 318–30. http://dx.doi.org/10.3390/life4030318.
Texto completoLe Vay, Kristian, Elia Salibi, Emilie Y. Song y Hannes Mutschler. "Nucleic Acid Catalysis under Potential Prebiotic Conditions". Chemistry – An Asian Journal 15, n.º 2 (9 de diciembre de 2019): 214–30. http://dx.doi.org/10.1002/asia.201901205.
Texto completoTsanakopoulou, Maria y John D. Sutherland. "Cyanamide as a prebiotic phosphate activating agent – catalysis by simple 2-oxoacid salts". Chemical Communications 53, n.º 87 (2017): 11893–96. http://dx.doi.org/10.1039/c7cc07517k.
Texto completoDe Graaf, R. M., J. Visscher, Y. Xu, G. Arrhenius y Alan W. Schwartz. "Mineral Catalysis of a Potentially Prebiotic Aldol Condensation". Journal of Molecular Evolution 47, n.º 5 (noviembre de 1998): 501–7. http://dx.doi.org/10.1007/pl00006406.
Texto completoMaurel, Marie-Christine y Jacques Ninio. "Catalysis by a prebiotic nucleotide analog of histidine". Biochimie 69, n.º 5 (mayo de 1987): 551–53. http://dx.doi.org/10.1016/0300-9084(87)90094-0.
Texto completoNinio, Jacques. "Errors and Alternatives in Prebiotic Replication and Catalysis". Chemistry & Biodiversity 4, n.º 4 (abril de 2007): 622–32. http://dx.doi.org/10.1002/cbdv.200790054.
Texto completoVallée, Yannick y Sparta Youssef-Saliba. "Sulfur Amino Acids: From Prebiotic Chemistry to Biology and Vice Versa". Synthesis 53, n.º 16 (1 de abril de 2021): 2798–808. http://dx.doi.org/10.1055/a-1472-7914.
Texto completoNavrotsky, Alexandra, Richard Hervig, James Lyons, Dong-Kyun Seo, Everett Shock y Albert Voskanyan. "Cooperative formation of porous silica and peptides on the prebiotic Earth". Proceedings of the National Academy of Sciences 118, n.º 2 (29 de diciembre de 2020): e2021117118. http://dx.doi.org/10.1073/pnas.2021117118.
Texto completoTesis sobre el tema "Prebiotic catalysis"
Li, Binjie. "Carbonyl Catalysis: Hydrolysis of Organophosphorus Compounds and Application in Prebiotic Chemistry". Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39818.
Texto completoWerner, Emilie. "Catalysis at the origin of life and catalysis today, a 3.8-billion-year jump". Electronic Thesis or Diss., Strasbourg, 2024. https://publication-theses.unistra.fr/public/theses_doctorat/2024/Werner_Emilie_2024_ED222.pdf.
Texto completoCatalysis enables selective and enhanced reactivity and is harnessed in both synthetic chemistry and biology. This thesis will discuss this concept at two different time points. Firstly, the chemical processes at the origins of life will be studied through two types of non-enzymatic catalysis: rare metal catalysis and metal/coenzyme cocatalysis. The latter is thought to be a product of evolution to become independent from rare environments and enable prebiotic chemistry to spread to more common media. Secondly, modern metal catalysis will be examined. A new aza-variant of the Piancatelli rearrangement will be described with sulfoximine nucleophiles, giving direct access to unprecedented 4-sulfoximinocyclopentenone scaffolds in good yields. These structures hold promises for applications in drug discovery
Ter-Ovanessian, Louis. "Apparition d'un métabolisme primitif dans les scénarios géochimiques d'origine de la vie. Avant le monde ARN". Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS377.
Texto completoA promising scenario for the origins of life is that of the «RNA world». To validate this model, it is necessary to explain how the first RNA molecules were born out of simpler molecular precursors. An unsolved question is whether noncanonical nucleobases were formed in parallel to the canonical ones or later, when life required higher functional diversity. Our hypothesis is that modern metabolic pathways could be partly inherited from previously existing abiotic reaction networks, provided they respect the geochemical context. These networks would be the result of a series of reactions established by the interaction of organic molecules with inorganic minerals. The catalytic role, entrusted to enzymes in modern biochemistry, would then have been played by heterogeneous catalysis on specific surface sites. The input of free energy to achieve thermodynamically unfavourable steps could rely on the mineral surfaces, on high energy inorganic molecules, or on macroscopic imbalances.To test this hypothesis in a specific case, the orotate pathway which leads to uracil synthesis, is studied here to test how protometabolic paths developed in an enzyme-free prebiotic world and how geochemical context affected the origins of life. Carbamoyl phosphate (CP) is the first high-energy building block that intervenes in the biosynthesis of uridine monophosphate. Thus, we investigated the likelihood of its occurrence in prebiotic conditions. The evolution of carbamoyl phosphate in water and in aqueous ammonia solutions without enzymes was characterised using ATR-IR, 31P and 13C spectroscopies. Carbamoyl phosphate in water at ambient conditions transforms to cyanate and carbamate/hydrogenocarbonate species within a matter of hours. Cyanate, less labile than CP, remains a potential carbamoylating agent. In ammonia solution, CP decomposition occurs more rapidly and generates urea. We conclude that CP is not a likely prebiotic reagent. Cyanate and urea are more promising substitutes for CP, as they are both “energy-rich” (high free enthalpy molecules in aqueous solutions) and kinetically inert toward hydrolysis. Energy-rich inorganic molecules (trimetaphosphate, phosphoramidates) were also explored for their suitability as sources of carbamoyl phosphate. Although these species did not generate carbamoylating agents, they exhibited energy transduction, specifically the formation of high-energy P–N bonds. In the living cell, the second step of synthesizing pyrimidine RNA monomers is a carbamoyl transfer from a carbamoyl donor to aspartic acid. We compared the biosynthetic reaction to two enzyme-free scenarios: aqueous and dried/wetted mineral. Mineral-assisted abiotic synthesis of the pyrimidine linear skeleton (carbamoyl aspartic acid) was performed over a thermal range from 25 °C up to 250 °C. In addition to aqueous synthesis of pyrimidine nucleobases, which is executed at 25 °C for 16 h, the catalytic properties of silica and hydromagnesite minerals were explored. While the use of various carbamoyl donors is enabled by thermodynamics, kinetics plays a determining role in selecting possible paths for the carbamoylation of aspartic acid as a start for building nucleobases. In the last step we explored in detail the cyclization of N-carbamoyl aspartic acid (NCA). We carried out in situ (TGA, IR) and ex situ (1H NMR) characterization of pyrimidine precursors after adsorption and thermal activation on a wide range of minerals. Our data suggest a possible metabolic crossroad for the chemical origin of canonical and noncanonical bases. We show that inorganic equivalents can replace the enzyme carrying out this synthetic step, but also other members of its enzymatic family (cyclic amidohydrolases). Finally, preliminary results evaluate the role of redox conditions, based on iron chemistry to better understand the orotic acid formation from dihydroorotate, as well as the prominent role of minerals in the formose reaction at the gas/solid interface
Jamshidi, Mohammad. "Formaldehyde as a Catalyst: Investigations on the Role of Formaldehyde as a Potential Prebiotic Catalyst and Desymmetrization Agent". Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36609.
Texto completoDioses, Castro Silvio y Richard Korswagen. "Over the possible role of metal atom clusters in cosmochemistry and in the origin of life". Revista de Química, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/100714.
Texto completoBedoin, Lise. "Emergence de biopolymères de complexite contrôlée dans les scénarios d'origine de la vie". Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS229.
Texto completoLiving matter is characterized by the presence of non-random biopolymers whose biological function depends on the monomer sequence. Thus, a major challenge for the elucidation of the Origins of Life lies in understanding how non-random polypeptides were formed and selected among all of the possible ones. In this work, analytical approaches based essentially on ultra-high resolution mass spectrometry were applied to the global analysis of desorption mixtures resulting from the thermal activation of amino acids on a mineral surface, under conditions compatible with a prebiotic scenario. The formation of relatively long oligopeptides, with non-random stoichiometries has been shown. It appears that the formation of hetero-peptides is favored. A structural study of the oligopeptides formed was also carried out by tandem mass spectrometry, optionally coupled with liquid chromatography or ion mobility. It made it possible to demonstrate sequence selectivity. Furthermore, the formation of regio-isomers has been demonstrated, confirming that under our polymerization conditions the scenario does not manifest regioselectivity for the predominant α bonds in proteins. Finally, no significant enantioselectivity was demonstrated. In addition, a mechanistic study of the condensation reaction was carried out. The successive appearance of oligopeptides of increased length has been observed over ranges of temperatures or reaction times, suggesting stepwise polymerization processes
Li, Yi-Chen y 李易宸. "Theoretical study on the prebiotic synthesis of adenine、cytosine and uracil -Catalysis by microsolvation". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/y38tf3.
Texto completo國立中正大學
化學暨生物化學研究所
102
There are two chapters in this thesis. The main topic is the theoretical study of the reaction mechanisms of the prebiotic synthesis of adenine, cytosine and uracil in neutral environment. In addition to the gas-phase study we also applied the microsolvation model and the polarizable continuum model (PCM) to take the solvation effects into consideration . In chapter one, we followed the mechanism proposed by Shapiro for the prebiotic synthesis of cytosine and uracil. Four fundamental steps were modeled computationally in the gas phase and in bulk solvent with and without microsolvation by a small molecule of H2O or NH3. We found that if a reaction involved hydrogen-atom transfer, the small molecule that was used as the microsolvation solvent also played as the role of a catalyst, and it could significantly reduce the energy barriers by approximately 20 kcal/mol. The bulk solvation model could sometimes further lower the barrier by a few kcal/mol. In chapter two, we followed the mechanism proposed by Oró for the prebiotic synthesis of adenine starting from polymerization of HCN. Five fundamental steps were modeled computationally in the gas phase and in bulk solvent with and without microsolvation by one or two small molecules of H2O or NH3. Similar to the study in Chapter one, the microsolvation was found to significantly lower the energy barriers for hydrogen transfer reactions in the mechanism. In summary, the study in this thesis suggested that the prebiotic synthesis of nucleic bases, and perhaps other biomolecules, can be catalyzed by small solvent-like molecules present in prebiotic conditions. This would make the origin of life from early earth with very limited raw material available more likely.
Capítulos de libros sobre el tema "Prebiotic catalysis"
Ferris, James P. "8. Catalysis and Prebiotic Synthesis". En Molecular Geomicrobiology, editado por Jillian F. Banfield, Javiera Cervini-Silva y Kenneth Nealson, 187–210. Berlin, Boston: De Gruyter, 2005. http://dx.doi.org/10.1515/9781501509551-012.
Texto completoTheng, Benny K. G. "Clay Mineral Catalysis of Natural Processes and Prebiotic Organic Reactions". En Clay Mineral Catalysis of Organic Reactions, 389–415. Boca Raton : CRC Press, Taylor & Francis Group, 2018.: CRC Press, 2018. http://dx.doi.org/10.1201/9780429465789-8.
Texto completoOkafor, C. Denise, Jessica C. Bowman, Nicholas V. Hud, Jennifer B. Glass y Loren Dean Williams. "Folding and Catalysis Near Life’s Origin: Support for Fe2+ as a Dominant Divalent Cation". En Prebiotic Chemistry and Chemical Evolution of Nucleic Acids, 227–43. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93584-3_8.
Texto completoKamaluddin y Shah Raj Ali. "Studies on Copper Chromicyanide as Prebiotic Catalyst". En Cellular Origin and Life in Extreme Habitats and Astrobiology, 153–56. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-94-007-1003-0_31.
Texto completoNegron-Mendoza, A., G. Albarran y S. Ramos-Bernal. "Clays as Natural Catalyst in Prebiotic Processes". En Chemical Evolution: Physics of the Origin and Evolution of Life, 97–106. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1712-5_7.
Texto completoKamaluddin. "Studies on Metal Ferrocyanides as Prebiotic Catalyst". En First Steps in the Origin of Life in the Universe, 95–97. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-1017-7_18.
Texto completoDavies, J., U. von Ahsen, H. Wank y R. Schroeder. "Evolution of Secondary Metabolite Production: Potential Roles for Antibiotics as Prebiotic Effectors of Catalytic RNA Reactions". En Ciba Foundation Symposium 171 - Secondary Metabolites: their Function and Evolution, 24–44. Chichester, UK: John Wiley & Sons, Ltd., 2007. http://dx.doi.org/10.1002/9780470514344.ch3.
Texto completoLahav, Noam. "Basic Assumptions and Strategies". En Biogenesis, 143–51. Oxford University PressNew York, NY, 1999. http://dx.doi.org/10.1093/oso/9780195117547.003.0015.
Texto completoLauro Aguirre, Juan. "Perspective chapter: A NEW KIND OF CHEMICAL KINETICS". En Chemical Kinetics and Catalysis - Perspectives, Developments and Applications [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1002883.
Texto completoLI, Yamei. "Minerals as Prebiotic Catalysts for Chemical Evolution towards the Origin of Life". En Mineralogy [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102389.
Texto completoActas de conferencias sobre el tema "Prebiotic catalysis"
AYLWARD, Nigel. "A Prebiotic Surface Catalysed Photochemically Activated Synthesis of L-Cysteine". En International Conference on Biological Engineering and Pharmacy 2016 (BEP 2016). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/bep-16.2017.1.
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