Buscar
Mostrando ítems 91-100 de 152
Highly c -Axis Oriented ZnO Thin Films on Glass Substrate by Pulsed Laser Deposition: Fluence-Dependent Effects
(American Scientific Publishers, 2019-10)
Highly c-axis oriented crystalline ZnO thin films were deposited onto glass substrates by the pulsedlaser deposition technique employing a Nd:YAG laser via its second harmonic, and different fluence(0.4 3.2 J/cm2) focused ...
Virtual prototype of a low-cost vacuum baffle based on thermoelectric cooling
(Pergamon-Elsevier Science Ltd, 2018-05)
Contaminants can enter vacuum systems from two main sources: backstreaming of oil vapors from the diffusion and mechanical pumps, and vapors generated as byproducts in the process chamber. Both sources can be hindered by ...
Exploratory monitoring of the quality and authenticity of commercial honey in Ecuador
(Multidisciplinary Digital Publishing Institute, 2019-03-20)
Honey is one of the oldest sweetening foods and has economic importance, making this product attractive to adulteration with cheap sugars. This can cause a critical problem in the honey industry and a possible health risk. ...
A combined theoretical and spectroscopic study of 4,6-di-O-acetyl-2,3-dideoxy-d-erythro-hex-2-enopyranosyl sulfamide: a novel glycosyl carbonic anhydrase IX inhibitor
(Elsevier, 2011-02)
The novel 4,6-di-O-acetyl-2,3-dideoxy-D-erythro-hex-2-enopyranosyl sulfamide, which exhibits selectivity for inhibiting isoform IX of carbonic anhydrase as overexpressed in many tumors, has been investigated from a combined ...
Back-and-Forth Energy Transfer during Electronic Relaxation in a Chlorin–Perylene Dyad
(American Chemical Society, 2021-10)
Donor–acceptor dyads represent a practical approach to tuning the photophysical properties of linear conjugated polymers in materials chemistry. Depending on the absorption wavelength, the acceptor and donor roles can be ...
Monitoring of Silver Electrodeposition onto HOPG Electrodes in the Presence of Picolinic Acid by in Situ Surface-Enhanced Raman Spectra Measurements
(American Chemical Society, 2014-02)
In situ surface-enhanced Raman spectra (SERS) have been recorded during silver potentiodynamic electrodeposition onto HOPG electrodes from solutions containing silver perchlorate and picolinic acid (PA). Modification of ...
Development of a general strategy for the quantification of pseudopolymorphs: analysis of cefadroxil monohydrate in commercial products
(Springer, 2020-07)
Purpose: The presence of different polymorphic or pseudo-polymorphic forms in active pharmaceutical ingredients may affect the performance of the formulated products. Pseudo-polymorphs, especially hydrates, present a ...
Releasing systems for aerospace industry based upon shape memory alloys: Characterization of materials for actuators
(Universidade Federal do Rio de Janeiro, 2018-07)
Releasing and deployment maneuvers carried out during space satellites launching are usually performed by utilizing pyrotechnics loads. However, it is considered convenient to replace this technique by others not requiring ...
Magnetic Fe3O4atSiO2-Pt and Fe3O4atSiO2-PtatSiO2 structures for HDN of indole
(Multidisciplinary Digital Publishing Institute, 2019-12)
The effect of a second porous SiO2 shell in the activity and selectivity of the Fe3O4atSiO2-Pt catalyst in the hydrodenitrogenation of indole is reported. The double Fe3O4atSiO2-PtatSiO2 structure was prepared by coating ...
Methodology for Zero-moment Point Experimental Modeling in the Frequency Domain
(2006-06-28)
Frequency domain methodology is applied to obtain a nominal model for the Zero-Moment Point (ZMP) stability index of a biped robot in an attempt to establish a relationship between the robot trunk trajectories and the ...