Search Results - "Viedma, Cristobal"

Chiral symmetry breaking during crystallization : Complete chiral purity induced by nonlinear autocatalysis and recycling by VIEDMA, Cristobal

“…We report experimental results that show a large and symmetric population of D and L crystals moving into complete chiral purity, with one of the enantiomers…”
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Homochirality beyond grinding: deracemizing chiral crystals by temperature gradient under boiling by Viedma, Cristóbal, Cintas, Pedro

“…A single-chirality solid phase can be obtained in boiling solutions containing a racemic mixture of left- and right-handed enantiomorphous crystals due to…”
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Selective Chiral Symmetry Breaking during Crystallization:  Parity Violation or Cryptochiral Environment in Control? by Viedma, Cristobal

“…We have attempted to check experimentally whether the parity violating energy difference (PVED) between enantiomers is ultimately responsible for any bias in…”
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Chiral symmetry breaking and complete chiral purity by thermodynamic-kinetic feedback near equilibrium: implications for the origin of biochirality by Viedma, Cristobal

“…Chiral symmetry breaking occurs when a physical or chemical process spontaneously generates a large excess of one of the two enantiomers--left-handed (L) or…”
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Enantiomer-Specific Oriented Attachment: Formation of Macroscopic Homochiral Crystal Aggregates from a Racemic System by Viedma, Cristóbal, McBride, J. Michael, Kahr, Bart, Cintas, Pedro

“…Let's get together: Racemic samples of d‐ and l‐enantiomorphous NaBrO3 (or NaClO3) crystals aggregate with nearly complete enantioselection. Centimeter‐sized…”
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Revisiting Homochiral versus Heterochiral Interactions through a Long Detective Story of a Useful Azobis-Nitrile and Puzzling Racemate by García de la Concepción, Juan, Flores-Jiménez, Mirian, Cuccia, Louis A., Light, Mark E., Viedma, Cristóbal, Cintas, Pedro

“…This paper documents and reinvestigates the solid-state and crystal structures of 4,4′-azobis-4-cyanopentanoic acid (ACPA), a water-soluble azobis-nitrile of…”
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A New Twist in Eutectic Composition: Deracemization of a Racemic Compound Amino Acid by Viedma Ripening and Temperature Fluctuation by Viedma, Cristobal, Ortiz, José Eugenio

“…Viedma ripening and temperature fluctuation are processes based on solution phase racemization and dissolution‐growth of racemic or scalemic conglomerates…”
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Pasteur’s Tweezers Revisited: On the Mechanism of Attrition-Enhanced Deracemization and Resolution of Chiral Conglomerate Solids by Hein, Jason E, Huynh Cao, Blessing, Viedma, Cristobal, Kellogg, Richard M, Blackmond, Donna G

“…Insights into the mechanism of attrition-enhanced deracemization and resolution of solid enantiomorphic chiral compounds are obtained by crystal size and…”
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Evolution of Solid Phase Homochirality for a Proteinogenic Amino Acid by Viedma, Cristobal, Ortiz, José E, Torres, Trinidad de, Izumi, Toshiko, Blackmond, Donna G

“…The inexorable evolution of solid-phase single chirality is demonstrated for the first time for a proteinogenic amino acid. Enantioenrichment is observed both…”
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Asymmetric amplification in amino acid sublimation involving racemic compound to conglomerate conversion by Viedma, Cristóbal, Noorduin, Wim L, Ortiz, José E, de Torres, Trinidad, Cintas, Pedro

“…A straightforward unprecedented sublimation protocol that reveals both conversion of a racemic compound into a racemic conglomerate and subsequent…”
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Food marketing towards children: brand logo recognition, food-related behavior and BMI among 3-13-year-olds in a south Indian town by Ueda, Peter, Tong, Leilei, Viedma, Cristobal, Chandy, Sujith J, Marrone, Gaetano, Simon, Anna, Stålsby Lundborg, Cecilia

“…To assess exposure to marketing of unhealthy food products and its relation to food related behavior and BMI in children aged 3-13, from different…”
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On the Physical Basis of Asymmetry and Homochirality by Cintas, Pedro, Viedma, Cristóbal

“…ABSTRACT Mirror symmetry breaking is ubiquitous in our visible universe taking place in elementary particles, atoms, and molecules. Molecular chirality is not…”
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On the Origin of Sugar Handedness: Facts, Hypotheses and Missing Links-A Review by Martínez, R. Fernando, Cuccia, Louis A., Viedma, Cristóbal, Cintas, Pedro

“…By paraphrasing one of Kipling’s most amazing short stories ( How the Leopard Got His Spots ), this article could be entitled “How Sugars Became Homochiral” …”
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Enantiomer-Specific Oriented Attachment of Guanidine Carbonate Crystals by Sivakumar, Reajean, Kwiatoszynski, Julien, Fouret, Amaury, Nguyen, Thi Phuong Thao, Ramrup, Parsram, Cheung, Pui Shan Monica, Cintas, Pedro, Viedma, Cristóbal, Cuccia, Louis A

“…Oriented attachment, a nonclassical crystallization phenomenon, describes the spontaneous self-assembly of adjoining crystals with common crystallographic…”
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On the Chiral Homogeneity of Nature: From Atoms to Small Molecules by Viedma, Cristóbal, Cintas, Pedro

“…The genesis of enantiopurity in nature, as exemplified by terrestrial amino acids and sugars, has fascinated scientists for more than 150 years. This is a…”
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Enantioenrichment in sublimed amino acid mixtures by Viedma, Cristóbal, Ortiz, José E, de Torres, Trinidad, Cintas, Pedro

“…A real amplification of an initial enantiomeric excess can be detected when two amino acids are sublimed at high temperature, even if one of the components is…”
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Experimental evidence of chiral symmetry breaking in crystallization from primary nucleation by Viedma, Cristobal

“…Chiral symmetry breaking in stirred crystallization of sodium chlorate (NaClO 3) is believed to occur via nucleation of a single chiral “mother crystal” that…”
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Enantiomeric crystallization from DL-aspartic and DL-glutamic acids: implications for biomolecular chirality in the origin of life by Viedma, C

“…Amino acids in living systems consist almost exclusively of the L-enantiomer. How and when this homochiral characteristic of life came to be has been a matter…”
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Evidence of gully formation by regional groundwater flow in the Gorgonum–Newton region (Mars) by Márquez, Alvaro, de Pablo, Miguel Ángel, Oyarzun, Roberto, Viedma, Cristóbal

“…The discovery of gullies on Mars suggests liquid water activity near the surface of the planet in recent times. Since liquid water is unstable under the…”
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Solution-Phase Racemization in the Presence of an Enantiopure Solid Phase by Viedma, Cristobal, Verkuijl, Bastiaan J. V., Ortiz, José E., de Torres, Trinidad, Kellogg, Richard M., Blackmond , Donna G.

“…Solution‐phase racemization drives the evolution of single chirality in the solid phase by the “chiral amnesia” process first described by Viedma. The current…”
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