• The dual site consisting of Al or Zr the support and Cu species is active. DFT indicates synergy acid sites supports species. Copper dispersion a sensitivity descriptor for activity. Glycerol produced in large quantities as byproduct biodiesel, among others hydroxyacetone (acetol) an important commodity obtained from glycerol. Metallic has been identified active dehydration glycerol to metal ...

The catalyst stability, mainly affected by coke deposition, remains being a challenge for the development of sustainable process hydrogen production steam reforming (SR) bio-oil. In this work, influence oxygenates composition in bio-oil on deactivation NiAl2O4 spinel derived has been approached studying SR wide range model with different functionalities, including acetic acid, acetone, ethanol,...

Electrochemical measurements show that the enzyme Glucose oxidase (GO) is adsorbed on the surface of TiO2 without apparently changing the flat band potential of the semiconductor, indicating that it does not cause a change of the energy of conduction band electrons. On the other hand, it is observed that GO markedly increases the efficiency of the two electron reduction of O2 to H2O2 which is a...

Electrocatalytic hydrogenation (ECH) is a sustainable pathway for the synthesis of value-added organic compounds, provided affordable catalysts with high activity, selectivity and durability are developed. Here, we synthesize Cu/C, Ni/C, and CuNi/C nanoparticles and compare their performance to Pt/C, Ru/C, PtRu/C for the ECH of hydroxyacetone, a bio-derived feedstock surrogate containing a carb...

We present first-generation and total production yields of glyoxal, methylglyoxal, glycolaldehyde, and hydroxyacetone from the oxidation of isoprene, methyl vinyl ketone (MVK), and methacrolein (MACR) with OH under high NOx conditions. Several of these first-generation yields are not included in commonly used chemical mechanisms, such as the Leeds Master Chemical Mechanism (MCM) v. 3.2. The fir...

Novotný O., Cejpek K., Velíšek J. (2007): Formation of α-hydroxycarbonyl and α-dicarbonyl compounds during degradation of monosaccharides. Czech J. Food Sci., 25: 119–130. The formation of α-hydroxycarbonyl and α-dicarbonyl compounds from monosaccharides (glucose, fructose, arabinose, glyceraldehyde, and 1,3-dihydroxyacetone) was studied in three different model systems comprising an aqueous an...

Nearly identical mixed-function supraoperons (defined as nested transcriptional units encoding gene products that function in more than one biochemical pathway) have been found recently in Pseudomonas stutzeri and Pseudomonas aeruginosa. The Pseudomonas serC(pdxF)-aroQp.pheA-hisHb-tyrAc-aroF+ ++-cmk-rpsA supraoperon encodes 3-phosphoserine aminotransferase, a bidomain chorismate mutase/prephena...