Prebiotic Models
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Dinâmica da impregnação a vácuo em meios porosos
Vacuum impregnation technology (VI) is a process that consists of removing internal air of a porous medium, through the application of vacuum in a hermetic container with the sample immersed in an impregnating solution, followed the recovery of the atmospheric pressure, leading to the solution penetratation into the sample porous space. In food processing, V
Publicado em: 2009
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2. Cooperação e Conflito em Modelos de Vesículas Pré-Bióticas / Cooperation and Conflict in Prebiotic Vesicle Models
The primordial genetic information crisis as defined by the Eigens quasispecies model, which can be used as a paradigm here, has been a challenge to any theory about the origin of life and prebiotic evolution for more than three decades. Despite several tentative solutions proposed along this period, theres no consensual solution to the scientific commun
Publicado em: 2006
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3. Effect of chicory roots drying to obtain inulin / Efeito da secagem de raizes de chicoria na obtenção de inulina
Chicory (Cichorium intybus L.) is a plant whose tuberous roots store inulin, with a high fructose content (about 94%). Chicory root is the most important tuberous root for industrial production of inulin. Inulin is a fructooligosaccharide that is not digestible but is selectively utilized by bifidobacteria in the large intestine, making inulin-type fructans
Publicado em: 2005
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4. Hydrophobic models of protein folding and the thermodynamics of chain-boundary interactions
We review some results concerning the energetic and dynamical consequences of taking a generic hydrophobic model of a random polypeptide chain, where the effective hydrophobic interactions are represented by Hookean springs. Then we present a set of calculations on a microscopic model of hydrophobic interactions, investigating the behaviour of a hydrophobic
Brazilian Journal of Physics. Publicado em: 2003-09
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5. Lattice model of replicators: aplication on prebiotic models and herpes ulcer / Dinâmica de replicação na rede: aplicações em modelos de evolução pré-biótica e de formação de úlceras
Two fundamental questions in the study of prebiotic evolution (origin of life) are concerned to the requisites for the persistence of small colonies of self-replicating molecules (replicators) and to the possibility that complex organisms evolve from simpler organisms as a result of mutations. These issues have been studied mainly in the chemical kinetics fo
Publicado em: 2001
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6. Group selection models in pre-biotic evolution / Modelos de seleção de grupo em evolução pré-biótica
Group selection was proposed initially within an ecological context as an evolutionary selective force acting on a group in the same way as the individual selection does on the individuals composing the population. Despite the initial resistance of the conservative evolutionary biologists concerning the ideas of group selection, in the last decades those con
Publicado em: 2000
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7. Prebiotic synthesis from CO atmospheres: Implications for the origins of life
Most models of the primitive atmosphere around the time life originated suggest that the atmosphere was dominated by carbon dioxide, largely based on the notion that the atmosphere was derived via volcanic outgassing, and that those gases were similar to those found in modern volcanic effluent. These models tend to downplay the possibility of a strongly redu
National Academy of Sciences.
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8. Compositional genomes: Prebiotic information transfer in mutually catalytic noncovalent assemblies
Mutually catalytic sets of simple organic molecules have been suggested to be capable of self-replication and rudimentary chemical evolution. Previous models for the behavior of such sets have analyzed the global properties of short biopolymer ensembles by using graph theory and a mean field approach. In parallel, experimental studies with the autocatalytic
The National Academy of Sciences.