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Annulation of phenols with methylbutenol over MOFs: The role of catalyst structure and acid strength in producing 2,2-dimethylbenzopyran derivatives

Shamzhy, Mariya V.; Opanasenko, Maksym V.; García Gómez, Hermenegildo; Cejka, Jiri (Elsevier, 2015-01-15)

The catalytic behavior of metal-organic frameworks of different structures (Fe(BTC), MIL-100(Fe), MIL-100(Cr) and Cu-3(BTC)(2)) was investigated in annulation reaction between 2-methyl-3-buten-2-ol and phenols differing ...
Catalytic Properties of 3D Graphene-Like Microporous Carbons Synthesized in a Zeolite Template

Sazama, Petr; Pastvova, Jana; Rizescu, Cristina; Tirsoaga, Alina; Parvulescu, Vasile I.; García Gómez, Hermenegildo; Kobera, Libor; Seidel, Jurgen; Rathousky, Jiri; Klein, Petr; Jirka, Ivan; Moravkova, Jaroslava; Blechta, Vaclav (American Chemical Society, 2018-03)

[EN] The inherent properties of a single atomic carbon layer in graphene offer opportunities for the creation of catalytically active centers tailored on a molecular level on a support with high thermal stability and very ...
Cellular automata and artificial brain dynamics

Fraile, Alberto; Panagiotakis, E.; Christakis, N.; Acedo Rodríguez, Luis (MDPI AG, 2018)

[EN] Brain dynamics, neuron activity, information transfer in brains, etc., are a vast field where a large number of questions remain unsolved. Nowadays, computer simulation is playing a key role in the study of such an ...
Characterization of complex fractionated atrial electrograms by Sample Entropy: An international multi-center study

Cirugeda Roldán, Eva María; Novak, Daniel; Kremen, Vaclav; Cuesta Frau, David; Keller, Matthias; Luik, Armin; Srutova, Martina (MDPI, 2015-11)

Atrial fibrillation (AF) is the most commonly clinically-encountered arrhythmia. Catheter ablation of AF is mainly based on trigger elimination and modification of the AF substrate. Substrate mapping ablation of complex ...
Chronic alcohol consumption alters extracellular space geometry and transmitter diffusion in the brain

De Santis, Silvia; Cosa-Liñán, Alejandro; Garcia-Hernandez, Raquel; Dmytrenko, Lesia; Vargova, Lydia; Vorisek, Ivan; Stopponi, Serena; Bach, Patrick; Kirsch, Peter; Kiefer, Falk; Ciccocioppo, Roberto; Sykova, Eva; Moratal, David; Sommer, Wolfgang H.; Canals, Santiago (American Association for the Advancement of Science, 2020-06)

[EN] Already moderate alcohol consumption has detrimental long-term effects on brain function. However, how alcohol produces its potent addictive effects despite being a weak reinforcer is a poorly understood conundrum ...
Comparison of the catalytic activity of MOFs and zeolites in Knoevenagel condensation

Opanasenko, Maksym; Dhakshinamoorthy, Amarajothi; Shamzhy, Mariya; Nachtigall, Petr; Horacek, Michal; García Gómez, Hermenegildo; Cejka, Jiri (Royal Society of Chemistry, 2013)

[EN] The catalytic behavior of metal-organic-frameworks (MOFs) CuBTC and FeBTC was investigated in Knoevenagel condensation of cyclohexane carbaldehyde and benzaldehyde with active methylene compounds and compared with ...
Deactivation Pathways of the Catalytic Activity of Metal-Organic Frameworks in Condensation Reactions

Opanasenko, Maksym; Dhakshinamoorthy, Amarajothi; Cejka, Jiri; García Gómez, Hermenegildo (Wiley-VCH Verlag, 2013-06)

[EN] In the present study we have selected three different condensation reactions as model reactions, namely the hydroxylalkylation of anisole by paraformaldehyde to bis(methoxyphenyl)-methane, the Pechmann condensation ...
Developable hyperspaces are metrizable

Holá, L'Ubica; Pelant, Jan; Zsilinszky, László (Universitat Politècnica de València, 2003-10-01)

[EN] Developability of hyperspace topologies (locally finite, (bounded) Vietoris, Fell, respectively) on the nonempty closed sets is characterized. Submetrizability and having a Gδ-diagonal in the hyperspace setting is ...
Duality-Based Nonlinear Quadratic Control: Application to Mobile Robot Trajectory-Following

Armesto Ángel, Leopoldo; Girbés, Vicent; Sala, Antonio; Miroslav Zima; Václav mídl (Institute of Electrical and Electronics Engineers (IEEE), 2015-07)

[EN] This paper presents noniterative linearizationbased controllers for nonlinear unconstrained systems, coined as extended Rauch Tung Striebel (ERTS) and unscented Rauch Tung Striebel (URTS) controllers, derived from ...
Dynamic approximate entropy electroanatomic maps detect rotors in a simulated atrial fibrillation model

Ugarte, Juan P.; Orozco-Duque, Andrés; Tobon Zuloaga, Catalina; Kremen, Vaclav; Novak, Daniel; Saiz Rodríguez, Francisco Javier; Oesterlein, Tobias; Schmitt, Clauss; Luik, Armin; Bustamante, John (Public Library of Science, 2014-12)

There is evidence that rotors could be drivers that maintain atrial fibrillation. Complex fractionated atrial electrograms have been located in rotor tip areas. However, the concept of electrogram fractionation, defined ...
Enhancing the atmospheric visibility and fog attenuation using a controlled FSO channel

Ijaz, Muhammad; Ghassemlooy, Zabih; Perez, Joaquin; Brazda, Vladimir; Fiser, Ondrej (Institute of Electrical and Electronics Engineers (IEEE), 2013-07-01)

[EN] In this letter, two methods for characterizing fog attenuation in terms of atmospheric visibility V in free space optics (FSO) communications are analyzed and compared. Both methods measure the fog attenuation based ...
Ergodic and dynamical properties of m-isometries

BERMUDEZ, TERESA; BONILLA, ANTONIO; MÜLLER, VLADIMIR; Peris Manguillot, Alfredo (Elsevier, 2019-01-15)

[EN] An example of a weakly ergodic 3-isometry is provided in [3], we give new examples of weakly ergodic 3-isometries and study numerically hypercyclic m-isometries on finite and infinite dimensional Hilbert spaces. In ...
Experimental and Theoretical Study of Bi2O2Se Under Compression

Pereira, A.L.J.; Santamaría Pérez, David; Ruiz Fuertes, Javier; Manjón, Francisco-Javier; Cuenca Gotor, Vanesa Paula; Vilaplana Cerda, Rosario Isabel; Gomis, O.; Popescu, Catalin; Muñoz, Alfonso; Rodríguez-Hernández, Plácida; Segura, Alfredo; Gracia, L.; Beltran, A.; Ruleova, P.; Drasar, C.; Sans-Tresserras, Juan Ángel (American Chemical Society, 2018-04-26)

[EN] We report a joint experimental and theoretical study of the structural, vibrational, elastic, optical, and electronic properties of the layered high-mobility semiconductor Bi2O2Se at high pressure. A good agreement ...
Geometry and Gâteaux smoothness in separable Banach spaces

Hajek, P.; Montesinos Santalucia, Vicente; Zizler, Vaclav (2012-06)

[EN] It is a classical fact, due to Day, that every separable Banach space admits an equivalent Gateaux smooth renorming. In fact, it admits an equivalent uniformly Gateaux smooth norm, as was shown later by Day, James, ...
Internal flow and air core dynamics in simplex and spill-return pressure-swirl atomizers

Maly, Milan; Janáčková, Lada; Jedelský, Jan; Sláma, Jaroslav; Sapík, Marcel; Wigley, Graham (Editorial Universitat Politècnica de València, 2017-07-28)

[EN] It is well known that the spray characteristics of pressure-swirl atomizers are strongly linked to the internal flow and that an unstable air core may cause instabilities in the spray. In this paper, a 10:1 scale ...
Managing expert knowledge in water network expansion project implementation

Anchieta, Thomaz F. de F.; Santos, Saulo A. R.; Brentan, Bruno M.; Carpitella, Silvia; Izquierdo Sebastián, Joaquín (Elsevier, 2021-09-29)

[EN] The implementation of expansion projects of water networks supplying growing cities is deemed to be a complex decision-making problem involving both technical aspects and expert knowledge. Management and control ...
Metal organic frameworks as heterogeneous catalysts for the production of fine chemicals

Dhakshinamoorthy, Amarajothi; Opanasenko, Maksym; Cejka, Jiri; García Gómez, Hermenegildo (Royal Society of Chemistry, 2013)

[EN] This review focuses on the use of metal organic frameworks (MOFs) as catalysts for the synthesis of fine chemicals. While petrochemistry is characterized by gas phase reactions, in which MOFs cannot compete with robust ...
Metal organic frameworks as solid catalysts in condensation reactions of carbonyl groups

Dhakshinamoorthy, Amarajothi; Opanasenko, Maksym; Cejka, Jirí; García Gómez, Hermenegildo (Wiley-VCH Verlag, 2013-02-11)

[EN] This review summarizes the use of metal organic frameworks (MOFs) as solid catalysts for condensation reactions. After an introductory section, in which condensation reactions are generally presented, a list of the ...
More on ultrafilters and topological games

González-Silva, R.A.; Hrusák, M. (Universitat Politècnica de València, 2009-10-01)

[EN] Two different open-point games are studied here, the G-game and the Gp-game, defined for each p ∈ ω∗. We prove that for each p ∈ ω∗, there exists a space in which none of the players of the Gp-game has a winning ...
On the separable quotient problem for Banach Spaces

Ferrando, J. C.; Kakol, Jerzy; López Pellicer, Manuel; Sliwa, Wieslaw (Adam Mickiewicz University, 2018-12)

[EN] While the classic separable quotient problem remains open, we survey general results related to this problem and examine the existence of infinite-dimensional separable quotients in some Banach spaces of vector-valued ...