Martinez-Franco R.,Technical University Valencia Consejo Superior Of Investigaciones Cientificas Upv Csic |
Cantin A.,Technical University Valencia Consejo Superior Of Investigaciones Cientificas Upv Csic |
Moliner M.,Technical University Valencia Consejo Superior Of Investigaciones Cientificas Upv Csic |
Corma A.,Technical University Valencia Consejo Superior Of Investigaciones Cientificas Upv Csic
Chemistry of Materials | Year: 2014
By means of organic structure directing agents (OSDA) formed by bulky paired quinolinium derived molecules, obtained by self-assembled monomers, it has been possible to synthesize for the first time the pure silicoaluminophosphate form of the small pore STA-6 zeotype. This synthesis method allows obtaining samples with very well dispersed framework silicon atoms, opening the possibility for its use in catalysis. © 2014 American Chemical Society.
Martin-Rodriguez J.A.,CSIC - Experimental Station of El Zaidín |
Ocampo J.A.,CSIC - Experimental Station of El Zaidín |
Molinero-Rosales N.,CSIC - Experimental Station of El Zaidín |
Tarkowska D.,Palacky University |
And 2 more authors.
Physiologia Plantarum | Year: 2015
Gibberellins (GAs) are key regulators of plant growth and development and recent studies suggest also a role during arbuscular mycorrhizal (AM) formation. Here, complementary approaches have been used to obtain a clearer picture that correlates AM fungal development inside roots with GA metabolism. An extensive analysis of genes associated with GA metabolism as well as a quantification of GA content in roots was made. Application of GA3 and its biosynthesis inhibitor prohexadione calcium (PrCa) combined with a GA-constitutive response mutant (procera) were used to determine whether fungal colonization is altered by the level of these hormones or by changes in the GA-signaling pathway. The increased levels of specific GAs from the 13-hydroxylation pathway in mycorrhizal roots correlate closely with the increased expression of genes coding enzymes from the GA biosynthetic trail. The imbalance of GAs in tomato roots caused by exogenous applications of GA3 or PrCa affects arbuscules in both negative and positive ways, respectively. In addition, procera plants were adversely affected by the mycorrhization process. Our findings demonstrate that an imbalance in favor of an increased amount of GAs negatively affects the frequency of mycorrhization and particularly the arbuscular abundance in tomato mycorrhizal roots and the results point out that AM formation is associated with a change in the 13-hydroxylation pathway of GAs. © 2014 Scandinavian Plant Physiology Society.
PubMed | Technical University Valencia Consejo Superior Of Investigaciones Cientificas Upv Csic
Type: Journal Article | Journal: Chemical communications (Cambridge, England) | Year: 2014
Cyclohexanone oxime is formed from nitrobenzene with 97% yield in a one-pot reaction catalysed by palladium and gold nanoparticles on carbon. The reaction is carried out under hydrogen at 60 C and the overall transformation involves a multi-step catalysed mechanism from which intermediates and catalytically active species have been identified.
PubMed | Technical University Valencia Consejo Superior Of Investigaciones Cientificas Upv Csic, University of California at Santa Barbara and Northwestern University
Type: Journal Article | Journal: Journal of the American Chemical Society | Year: 2015
Zeolites are crystalline inorganic solids with microporous structures, having widespread applications in the fields of catalysis, separation, adsorption, microelectronics, and medical diagnosis. A major drawback of zeolites is the mass transfer limitation due to the small size of the micropores (less than 1 nm). Numerous efforts have been dedicated to integrating mesopores with the microporous zeolite structures by using templating and/or destructive approaches. Here we provide a new strategy for hierarchical pore size zeolite synthesis, without using supramolecular or hard templates. The branching epitaxial growth behavior, as a result of aluminum-zoning, contributes to the formation of the hierarchical porous zeolite structures.