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Now showing items 11641-11650 of 11754
Hydrogenation of sunflower oil over M/SiO2 and M/Al2O3 (M = Ni, Pd, Pt, Co, Cu) catalysts
(Springer, 2016-03-11)
This work is aimed at evaluating the performance of several catalysts in the partial hydrogenation of sunflower oil. The catalysts are composed of noble (Pd and Pt) and base metals (Ni, Co and Cu), supported on both silica ...
Extended Enolates: Versatile Intermediates for Asymmetric C-H Functionalization via Noncovalent Catalysis
(Wiley, 2021)
Catalyst-controlled functionalization of unmodified carbonyl compounds is a relevant operation in organic synthesis, especially when high levels of site- and stereo-selectivity can be attained. This objective is now within ...
Brønsted Base Catalyzed One-Pot Synthesis od Stereodefined Six-Member Carbocycles Featuring Transient Trienolates and a Key Intramolecular 1,6-Addition
(Wiley-VCH, 2019-07-31)
Acatalyst-driven one-pot reaction sequence is
developed for the enantio- and diastereoselective synthesis of
tetrasubstituted cyclohexenes from simple unsaturated ketones
or thioesters.The method involves atertiary ...
Detecting Areas of Improvement in Secondary Education: Listening to Management Teams and Teachers
(Universidad Pedagógica Nacional (Colombia), 2024-04-01)
The general aim of this research study is to detect needs and possible areas of improvement
in the Basque education system. To this end, this paper describes and compares
the discourses of different informants, using a ...
Surfing Time-Motion Characteristics Possible to Gain Using Global Navigation Satellite Systems: A Systematic Review
(MDPI, 2024-05-27)
The popularity of surfing has increased exponentially, reaching its recent debut in the Olympic Games. However, surfing suffers from a relative immature technological market, while in other sports some technologies such ...
De la Fracción del Ejército Rojo a las Células Antiimperialistas. La interacción con el Estado y la nueva violencia política híbrida en la Alemania de los años 90
(Asociación de Historia Actual, 2024-06-14)
El presente ensayo pretende ofrecer un primer recorrido de la historia del grupo violento social-revolucionario e islamista alemán de las Células Antiimperialistas (AIZ), nacido a principios de la década de los años 90. ...
RF Energy Absorption in Human Bodies Due to Wearable Antennas in the 2.4 GHz Frequency Band
(Wiley, 2019-11-19)
Human exposure to electromagnetic fields produced by two wearable antennas operating in the 2.4 GHz frequency band was assessed by computational tools. Both antennas were designed to be attached to the skin, but they were ...
Analysis and Design of a Multilayer DC Bus With Low Stray Impedance and Homogenous Current Distribution
(VDE, 2018-06-05)
The aim of this work is to design a DC bus for a silicon carbide power converter whose application is the automotive sector. This power converter works at high voltage and current levels with high frequencies signals, so ...
Status and advances in Electric Vehicle’s power modules packaging technologies
(VDE, 2016-05-10)
The technology used in the design of the high power density Electric Vehicle (EV) power inverters packaging (power modules electrical, thermal and thermo-mechanical properties) directly
affect the power inverter performance, ...
Analysis of Interleaved Series Capacitor Tapped Buck topologies for adjustable output voltage range
(VDE, 2022-05-10)
During the last decade, high step-down applications have become an emerging topic in power electronics.
From delivering power to modern embedded systems, to improving efficiency in high current and low
voltage appliances, ...