Results 41 to 50 of about 19,936 (198)

Chiral Polymerization in Open Systems From Chiral-Selective Reaction Rates

, 2012
We investigate the possibility that prebiotic homochirality can be achieved exclusively through chiral-selective reaction rate parameters without any other explicit mechanism for chiral bias.
A Bakasov, A Salam, Bradley J. Nelson, C Chyba, C McKay, D Fitz, DG Fraser, DK Kondepudi, DP Glavin, F Frank, FHC Crick, J Bailey, JAD Wattis, JAD Wattis, JB Corliss, JD Dunitz, JR Cronin, LD Landau, LE Orgel, M Gleiser, M Gleiser, MA Zuilen van, Marcelo Gleiser, PC Joshi, PCW Davies, PCW Davies, PGH Sandars, R Gomes, R Hazen, R Plasson, SA Benner, Sara Imari Walker, SJ Mojzsis, W Gilbert, WA Bonner, Y Saito, Y Yamagata, Z Martins   +37 more
core   +1 more source

In situ detection of boron by ChemCam on Mars [PDF]

, 2017
We report the first in situ detection of boron on Mars. Boron has been detected in Gale crater at levels Curiosity rover ChemCam instrument in calcium-sulfate-filled fractures, which formed in a late-stage groundwater circulating mainly in phyllosilicate-
Anderson, Baldridge, Benton Clark, Blake, Boutlerow, Bridges, Bridges, Clegg, Cloutis, Couch, Cousin, Crowley, Dorothea M. Delapp, Ehlmann, Ethan B. Haldeman, Eugster, Fraeman, Fredrickson, Frydenvang, Furukawa, Garrett, Goldberg, Gooding, Grew, Grotzinger, Grotzinger, Harder, Hesse, Hicks, Hurowitz, Hynek, Ingri, Jens Frydenvang, John C. Bridges, Karahan, Kenneth Herkenhoff, Keren, Keren, Kim, Lahav, Lahav, Lanza, Larralde, Le Mouélic, Lerman, Lodders, Lowenstein, Madeleine R. Bodine, Malin, Mangold, Maurice, Milliken, Morris, Nachon, Nachon, Nina L. Lanza, Orti, Osterloo, Osterloo, Patrick J. Gasda, Perry, Rampe, Rapin, Rhonda McInroy, Ricardo, Roger C. Wiens, Ruiz-Mirazo, Samuel Clegg, Sansonetti, Schubert, Schwenzer, Scorei, Spivack, Stephenson, Susanne P. Schwenzer, Sylvestre Maurice, Tanner, Thomas F. Bristow, Vaniman, Vaniman, Veronica L. Sanford, Wiens, Wiens, William Rapin, Williams, Yen, You   +86 more
core   +6 more sources

Non-associative phase separation in an evaporating droplet as a model for prebiotic compartmentalization

Nature Communications, 2021
Prebiotic compartmentalization could prove essential for the evolution of life. Guo et al. show that liquid-liquid separation in an aqueous two-phase system driven by evaporation may already suffice to facilitate chemical processes required for the RNA ...
Wei Guo, Andrew B. Kinghorn, Yage Zhang, Qingchuan Li, Aditi Dey Poonam, Julian A. Tanner, Ho Cheung Shum   +6 more
doaj   +1 more source

Identification of the prebiotic translation apparatus within the contemporary ribosome [PDF]

, 2009
A structural element that could have existed independently in the prebiotic era was identified at the active site of the contemporary ribosome. It is suggested to have functioned as a proto-ribosome catalyzing peptide bond formation and non-coded ...
Ada Yonath, Anat Bashan, Chen Davidovich, Ilana Agmon   +3 more
core   +1 more source

Structural Phenomena in a Vesicle Membrane Obtained through an Evolution Experiment: A Study Based on MD Simulations

Life, 2023
The chemical evolution of biomolecules was clearly affected by the overall extreme environmental conditions found on Early Earth. Periodic temperature changes inside the Earth’s crust may have played a role in the emergence and survival of functional ...
María J. Dávila, Christian Mayer
doaj   +1 more source

Origin of Life

, 2012
The evolution of life has been a big enigma despite rapid advancements in the fields of biochemistry, astrobiology, and astrophysics in recent years.
A. Gibbons, Ashwini Kumar Lal, C. Bohler, C. Chyba, C. Huber, C.E. Manning, C.J. Salter, D. Penny, D. Warmflash, D.S. Heckman, D.S. Mckay, E.G. Roussel, F. Hoyle, F. Hoyle, F. Hoyle, G.F. Joyce, H.C. Arp, H.C. Urey, J. Li, J. Maddox, J. Postgate, J.B.S. Haldane, J.K. Fredrickson, J.V. Narlikar, J.W. Schopf, K. Kvenvolden, L.-H. Lin, L.E. Orgel, L.J. Richardson, M.T. Mondigan, N.C. Wickramsinghe, P. David, P. Ehrenfreund, P. Senapathy, R. Shapiro, R.D. Lorenz, S Arrhenius, S.J. Mojzsis, S.L. Miller, S.L. Miller, Stofan, T. Brock, T.D. Brack, W. Gilbert, W. Martin, Y.-J. Kuan, Y.-J. Ma   +46 more
core   +1 more source

Synthesis of fructo-oligosaccharides using grape must and sucrose as raw materials [PDF]

, 2019
Grape must market has been rising and there is an increasing interest to use it as a natural replacement for traditional sugars. Food or beverages with prebiotic compounds, including fructo-oligosaccharides (FOS), emerge as an alternative for the new ...
Gomez Zavaglia, Andrea, Kakisu, Emiliano Javier, Romano, Nelson Gastón, Ureta, María Micaela   +3 more
core   +1 more source

Uracil in the carbonaceous asteroid (162173) Ryugu

Nature Communications, 2023
Uracil was identified in the sample returned from the asteroid Ryugu. Having been provided to the early Earth as a component in such asteroidal materials, these molecules might have played a role for prebiotic chemical evolution on the early ...
Yasuhiro Oba, Toshiki Koga, Yoshinori Takano, Nanako O. Ogawa, Naohiko Ohkouchi, Kazunori Sasaki, Hajime Sato, Daniel P. Glavin, Jason P. Dworkin, Hiroshi Naraoka, Shogo Tachibana, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei-ichiro Watanabe, Yuichi Tsuda, Hayabusa2-initial-analysis SOM team   +32 more
doaj   +1 more source

Prebiotics, faecal transplants and microbial network units to stimulate biodiversity of the human gut microbiome [PDF]

, 2013
Accumulating evidence demonstrates the intimate association between human hosts and the gut microbiome. Starting at birth, the sterile gut of the newborn acquires a diverse spectrum of microbes, needed for immunological priming.
Biasucci G., El Aidy S., Gibson G.R., Khoruts A., Martin J.A., Shahinas D., Van den Abbeele P., Yatsunenko T.   +7 more
core   +1 more source

A thermodynamic basis for prebiotic amino acid synthesis and the nature of the first genetic code

, 2009
Of the twenty amino acids used in proteins, ten were formed in Miller's atmospheric discharge experiments. The two other major proposed sources of prebiotic amino acid synthesis include formation in hydrothermal vents and delivery to Earth via meteorites.
Chakrabarti S., Paul G. Higgs, Ralph E. Pudritz   +2 more
core   +1 more source