Results 51 to 60 of about 27,504 (316)

Galacto-oligosaccharides formation during manufacture of different varieties of yogurt. Stability through storage [PDF]

, 2015
Galacto-oligosaccharides (GOS) have interest in the food industry due to their recognized functional properties. In this work, we studied the effect of a commercial β-galactosidase enzyme from Kluyveromyces lactis (YNL-2, GODO) and Lactobacillus ...
Bergamini, Carina Viviana, Perotti, Maria Cristina, Rebechi, Silvina Roxana, Vénica, Claudia Inés   +3 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

prebiotic phosphorus chemistry reconsidered

Origins of life and evolution of the biosphere, 1997
The available evidence indicates that the origin of life on Earth certainly occurred earlier than 3.5 billion years ago and perhaps substantially earlier. The time available for the chemical evolution which must have preceded this event is more difficult to estimate.
openaire   +3 more sources

Spontaneous formation and base pairing of plausible prebiotic nucleotides in water

Nature Communications, 2016
One of the questions for prebiotic chemistry is the formation of complementary base pairing systems. Here, the authors show that plausible two prebiotic heterocycles can form glycosidic bonds with ribose in water and that these spontaneously base-pair in
Brian J. Cafferty, David M. Fialho, Jaheda Khanam, Ramanarayanan Krishnamurthy, Nicholas V. Hud   +4 more
doaj   +1 more source

A Model Study on the Dynamics of the Amino Acid Content in Micrometeoroids during Atmospheric Entry

Chemistry, 2020
A model for the survival of the amino acid content in micrometeorites and its possible transformations upon atmospheric entry is described. Since any organic species released in the atmosphere at high altitudes would exhibit a limited lifetime with ...
Carlo Canepa
doaj   +1 more source

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

Open questions in understanding life’s origins

Communications Chemistry, 2021
The chemical space of prebiotic chemistry is extremely large, while extant biochemistry uses only a few thousand interconnected molecules. Here we discuss how the connection between these two regimes can be investigated, and explore major outstanding ...
Christopher J. Butch, Markus Meringer, Jean-Sebastien Gagnon, H. James Cleaves   +3 more
doaj   +1 more source

Nitrogen Oxide Concentrations in Natural Waters on Early Earth

, 2019
A key challenge in origins-of-life studies is estimating the abundances of species relevant to the chemical pathways proposed to have contributed to the emergence of life on early Earth.
Babbin, Andrew R., Ranjan, Sukrit, Rimmer, Paul B., Sasselov, Dimitar D., Todd, Zoe R.   +4 more
core   +1 more source

THz time-domain spectroscopy of mixed CO2–CH3OH interstellar ice analogs [PDF]

, 2016
The icy mantles of interstellar dust grains are the birthplaces of the primordial prebiotic molecular inventory that may eventually seed nascent solar systems and the planets and planetesimals that form therein.
Allodi, Marco A., Blake, Geoffrey A., Ioppolo, Sergio, McGuire, Brett A.   +3 more
core   +3 more sources

Questions and Answers Related to the Prebiotic Production of Oligonucleotide Sequences from 3′,5′ Cyclic Nucleotide Precursors

Life, 2021
Template-free nonenzymatic polymerization of 3′,5′ cyclic nucleotides is an emerging topic of the origin of life research. In the last ten years, a number of papers have been published addressing various aspects of this process.
Judit E. Šponer, Jiří Šponer, Aleš Kovařík, Ondrej Šedo, Zbyněk Zdráhal, Giovanna Costanzo, Ernesto Di Mauro   +6 more
doaj   +1 more source