Results 11 to 20 of about 31,237 (155)

La historia del primer principio de la termodinámica y sus implicaciones didácticas [PDF]

Revista Eureka sobre Enseñanza y Divulgación de las Ciencias, 2007
En este trabajo se realiza una breve introducción histórica y epistemológica del nacimiento de la termodinámica como ciencia moderna.Se muestra,así mismo,como esta historia puede contribuir a mejorar la enseñanza de la termodinámica y a superar algunas ...
Furió-Gómez, C., Solbes, J., Furió-Mas, C.   +2 more
doaj   +7 more sources

Photo-Fenton Degradation of RB5 Dye in Aqueous Solution Using Fe Supported on Mexican Natural Zeolite

International Journal of Photoenergy, 2019
A Mexican natural zeolite (MNZ) was impregnated with Fe at concentrations of 5 and 10 mg FeCl3/g MNZ (MNZ/Fe) in order to study the photo-Fenton degradation of Reactive Black 5 (RB5) dye.
José Domenzain-Gonzalez, José J. Castro-Arellano, Luis A. Galicia-Luna, Luis Lartundo-Rojas   +3 more
doaj   +2 more sources

A three-dimensional model to describe complete human corneal oxygenation during contact lens wear. [PDF]

J Biomed Mater Res B Appl Biomater, 2023
A full 3D axisymmetric and time‐dependent model of the cornea‐lens system has been numerically solved to determine the oxygen flux and consumption in each part of the cornea. We apply our model to different lenses currently usted on the market, showing the importance of detailed geometry in the modelling of these systems. Abstract We perform a novel 3D
Aguilella-Arzo M, Compañ V.
europepmc   +2 more sources

A new three-dimensional model to describe human corneal oxygenation during contact lenses wear. [PDF]

Ophthalmic Physiol Opt
Abstract Purpose This three‐dimensional study investigated how different contact lens materials affect oxygen levels in the cornea. Specifically, it measured oxygen tension, flux and consumption in the epithelium, stroma and endothelium when exposed to various contact lenses.
Gozálvez-Zafrilla JM, Aguilella-Arzo M, Compañ V.   +2 more
europepmc   +2 more sources

Cellulose‐Assisted Formation of 2D Hybrid Halide Perovskite Nanocrystals with Enhanced Stability for Light‐Emitting Devices

Advanced Optical Materials, Volume 11, Issue 20, October 18, 2023., 2023
The addition of a large amount of β‐(1,4) cellulose oligosaccharide (20 wt.%) to metal halide perovskites (MHPs) layers causes a reduction of the perovskite grains to the nanometer scale (30–40 nm) together with a 14‐fold increase of the photoluminescence quantum yield (PLQY).
Susana Ramos‐Terrón, Lea Spitzer, Cristina Martín, Eduardo Solano, Daniel Hermida‐Merino, Sébastien Lecommandoux, François Jérôme, Henri Cramail, Pablo G. Argudo, Gustavo de Miguel   +9 more
wiley   +1 more source

Study of the solubility of xonotlite

ce/papers, Volume 6, Issue 2, Page 238-245, September 2023., 2023
Abstract Xonotlite (Ca6Si6O17(OH)2) is a hydrated crystalline calcium silicate with CaO/SiO2 = 1, which forms under hy‐drothermal conditions at temperature above ∼100°C. It has good thermal stability, it dehydrates to wollastonite only at 770 to 800°C and shows a good resistance to high pressures.
Serena Mingione, Barbara Lothenbach, Frank Winnefeld, Ann Opsommer   +3 more
wiley   +1 more source

Insight into the Role of Guanidinium and Cesium in Triple Cation Lead Halide Perovskites

Solar RRL, Volume 5, Issue 12, December 2021., 2021
Partial replacement (5–15%) of methylammonium (MA) in the MAPbI3 perovskite by cesium or guanidinium (Gua) cations is demonstrated by X‐ray diffraction, revealing shrinkage or expansion of the unit cell upon Cs or Gua incorporation, respectively. The power conversion efficiency improves from an average value of 18.6% for the MAPbI3 to a value of 20.0 ...
Susana Ramos-Terrón, José Francisco Illanes, Diego Bohoyo-Gil, Luis Camacho, Gustavo de Miguel   +4 more
wiley   +1 more source

Size‐Based Cationic Molecular Sieving through Solid‐State Nanochannels

Advanced Materials Interfaces, Volume 8, Issue 6, March 23, 2021., 2021
The molecular sieving behavior of a soft‐etched nanoporous polyimide membrane using cationic alkali metal‐crown ether complexes and organic cations ranging in size from ammonium to tetraalkylammonium is demonstrated. The experimental data shows that nanochannels only allow the permeation of small cationic species, while excluding the larger ones ...
Mubarak Ali, Saima Nasir, Kristina Froehlich, Patricio Ramirez, Javier Cervera, Salvador Mafe, Wolfgang Ensinger   +6 more
wiley   +1 more source

ABORDAGENS TERMODINÂMICAS: UMA ANÁLISE DAS LEIS E DOS PRINCIPAIS CONCEITOS EM LIVROS DIDÁTICOS

Revista Binacional Brasil - Argentina, 2020
O estudo e o entendimento da termodinâmica exige um criterioso processo de assimilação de leis e um conjunto bem estruturado de conceitos teóricos. Ao longo desse trabalho, vamos apresentar uma explanação dos principais conceitos envolvidos no estudo ...
Carlos Takiya, Gabriel Fonseca Guimarães, Ian Lima Santana, Luan Santos Lemos   +3 more
doaj   +1 more source

Dissection of enzymatic kinetics and elucidation of detailed parameters based on the Michaelis‐Menten model. Kinetic and thermodynamic connections

Engineering Reports, Volume 2, Issue 9, September 2020., 2020
A new approach for analyzing the simple Michaelis‐Menten original data is described using a computational/numerical integration approach yielding a complete Michaelis‐Menten solution. The system is free of steady‐state restrictions/enzyme‐substrate ratio limitations, and the method yields the Michaelis‐Menten kinetic constants k+1, k‐1 and k2 values ...
Carlos F. S. Bonafe, Daniel F. de Lima Neto, César A. P. Aguirre, Silvio A. B. Vieira de Melo, Wallisson Dos S. Lima, Jose A. C. Bispo   +5 more
wiley   +1 more source