Dafc
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Ethylene glycol oxidation on ternary PtRhNi/C electrocatalyst with different metal compositions
ABSTRACT Direct Alcohol Fuel Cells (DAFC’s) are an alternative to fuel cell systems and when is used alkaline medium this has an increase performance. The alkaline direct alcohol fuel cells (ADAFC's) have some advantages such as low-emission, high energy efficiency, improved oxidation kinetics, low crossover and in addition there is a broad range of materi
Matéria (Rio J.). Publicado em: 20/07/2017
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2. Preparation of PtSn/C, PtRu/C, PtRh/C, PtRuRh/C and PtSnRh/C electrocatalysts using an alcohol-reduction process for methanol and ethanol oxidation / Preparação e caracterização de eletrocatalisadores PtRu, PtSn, PtRh, PtRuRh e PtSnRh para oxidação direta de álcoois em células a combustível tipo PEM utilizando a metodologia da redução por álcool
Os eletrocatalisadores PtRh/C, PtRu/C, PtSn/C, PtRuRh/C e PtSnRh/C (20% em massa de metais) foram preparados pelo método da redução por álcool usando H2PtCl6.6H2O (Aldrich), RhCl3.xH2O (Aldrich) e SnCl2.2H2O (Aldrich) como fonte de metais e o carbono Vulcan XC-72 como suporte. Os eletrocatalisadores foram caracterizados pelas técnicas de EDX, difração
Publicado em: 2009
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3. Genetic Analysis of the Roles of Daf-28 and Age-1 in Regulating Caenorhabditis Elegans Dauer Formation
Based on environmental cues, the nervous system of Caenorhabditis elegans regulates formation of the dauer larva, an alternative larval form specialized for long-term survival under harsh conditions. Mutations that cause constitutive or defective dauer formation (Daf-c or Daf-d) have been identified and the genes ordered in a branched pathway. Most Daf-c mut
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4. Evidence for Parallel Processing of Sensory Information Controlling Dauer Formation in Caenorhabditis Elegans
Dauer formation in Caenorhabditis elegans is induced by chemosensation of high levels of a constitutively secreted pheromone. Seven genes defined by mutations that confer a dauer-formation constitutive phenotype (Daf-c) can be congruently divided into two groups by any of three criteria. Group 1 genes (daf-11 and daf-21) are (1) strongly synergistic with gro
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5. A Screen for Nonconditional Dauer-Constitutive Mutations in Caenorhabditis Elegans
In Caenorhabditis elegans, formation of the developmentally arrested dauer larva is induced by high levels of a constitutively secreted pheromone. Synergy between two groups of incompletely penetrant dauer-constitutive (Daf-c) mutations has recently led to a proposal that these two groups of genes are partially redundant and function in two parallel pathways
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6. Daf-2, Daf-16 and Daf-23: Genetically Interacting Genes Controlling Dauer Formation in Caenorhabditis Elegans
Under conditions of high population density and low food, Caenorhabditis elegans forms an alternative third larval stage, called the dauer stage, which is resistant to desiccation and harsh environments. Genetic analysis of some dauer constitutive (Daf-c) and dauer defective (Daf-d) mutants has revealed a complex pathway that is likely to function in particu
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7. A DAF-1-binding protein BRA-1 is a negative regulator of DAF-7 TGF-β signaling
We have identified homologs of a human BMP receptor-associated molecule BRAM1 in Caenorhabditis elegans. One of them, BRA-1, has been found to bind DAF-1, the type I receptor in the DAF-7 transforming growth factor-β pathway through the conserved C-terminal region. As analyzed using a BRA-1∷GFP (green fluorescent protein) fusion gene product, the br
The National Academy of Sciences.
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8. Genetic Analysis of Chemosensory Control of Dauer Formation in Caenorhabditis Elegans
Dauer larva formation in Caenorhabditis elegans is controlled by chemosensory cells that respond to environmental cues. Genetic interactions among mutations in 23 genes that affect dauer larva formation were investigated. Mutations in seven genes that cause constitutive dauer formation, and mutations in 16 genes that either block dauer formation or result in