Results 31 to 40 of about 7,798 (192)

Determination of Arsenic, Mercury and Barium in herbarium mount paper using dynamic ultrasound-assisted extraction prior to atomic fluorescence and absorption spectrometry [PDF]

, 2011
A dynamic ultrasound-assisted extraction method using Atomic Absorption and Atomic Flourescence spectrometers as detectors was developed to analyse mercury, arsenic and barium from herbarium mount paper originating from the herbarium collection of the ...
B. Chen, B. Colston, Boehnert M., J. González-Rodríguez, J. Ruiz-Jiménez, Jaiswal A. K., Jickells S., Luque de Castro M. D., M. D. Luque de Castro, Marte F., Purewal V., S. Lummas, W. Corns, Özden Ö.   +13 more
core   +1 more source

Metodología de Evaluación de los Pararrayos de Carburo de Silicio [PDF]

Información tecnológica, 2010
Resumen Este trabajo presenta los resultados de una investigacion cuyo objetivo fue el diagnostico de los pararrayos de carburo de silicio. En el laboratorio fueron realizados ensayos en pararrayos, siendo determinados los valores de tension disruptiva en frecuencia industrial y de impulso atmosferico.
Kanashiro, Arnaldo G, Zanotti Jr, Milton, Obase, Paulo F, Bacega, Wilson R   +3 more
openaire   +2 more sources

Production of hydroxyectoine from biogas by an engineered strain of Methylomicrobium alcaliphilum using a novel Taylor‐flow bioreactor

Journal of Chemical Technology &Biotechnology, Volume 100, Issue 7, Page 1425-1433, July 2025.
Abstract BACKGROUND The production of compatible solutes, such as ectoine and hydroxyectoine, is of great interest due to their industrial and biotechnological applications. Methylomicrobium alcaliphilum was genetically engineered to replace a native gene with a heterologous one, aiming to enhance ectoine production.
Raquel Herrero‐Lobo, Nuria Fernández‐González, Eva Marcos, María Alejandra Martínez, Pedro García‐Encina, María del Rosario Rodero, Raúl Muñoz, Sergio Bordel   +7 more
wiley   +1 more source

Microstructure and mechanical properties of two tool steels with ultrahigh boron content [PDF]

, 1998
[ES] En el presente trabajo se han modificado dos aceros para herramientas convencionales por la presencia de un contenido de boro entre 0,5 y 1 % en masa.
Acosta, P., Frommeyer, G., Jiménez, José Antonio, Ruano, Oscar Antonio   +3 more
core   +1 more source

Effects of Hydrogen Bonding in Silicon Nitride/Polyimide Passivation Bilayer in SiC Power Devices

physica status solidi (a), Volume 221, Issue 17, September 2024.
The concentration of hydrogen in silicon nitride films present as N–H groups is correlated with the reliability of the bilayer obtained by combining it with a polyimide layer. The greater reactivity of N–H compared to Si–H also involves the reduction of the adhesion of the two layers with the formation of delamination and diffusion of water ...
Antonino Scandurra, Gabriele Bellocchi, Giuseppe Arena, Simone Rascunà, Michele Calabretta, Massimo Boscaglia, Mario Saggio, Giacometta Mineo, Valentina Iacono, Stefano Boscarino, Salvatore Mirabella, Francesco Ruffino, Maria Grazia Grimaldi   +12 more
wiley   +1 more source

Efecto del tratamiento térmico de desestabilización en el desgaste de hierros blancos de alto cromo [PDF]

, 2009
La resistencia a la abrasión de hierros fundidos de alto cromo puede ser mejorada mediante la aplicación de tratamientos térmicos específicos que favorezcan tanto la transformación de austenita en martensita, como la precipitación de carburos secundarios.
Iván Morales, Luis Méndez, Wilson Hormaza   +2 more
core   +2 more sources

A High Performing Conjugated Microporous Polymer Cathode for Practical Sodium Metal Batteries Using an Ammoniate as Electrolyte

Advanced Energy Materials, Volume 14, Issue 27, July 19, 2024.
This work demonstrates the outstanding electrochemical performance of a sodium metal battery based on a conjugated microporous polymer cathode and ammoniate electrolyte. This battery exhibits long‐term cyclability (4000 cycles), excellent rate capability (52% capacity retention at 250C), and an unprecedented areal capacity (7 mAh cm−2).
Debora Ruiz‐Martinez, Rebecca Grieco, Marta Liras, Nagaraj Patil, Rebeca Marcilla   +4 more
wiley   +1 more source

Effect of dietary fat on proximal composition, sensorial analysis and shelf life of a traditional Spanish cooked pork product “Lomo de Sajonia” from Iberian pork

Animal Science Journal, Volume 95, Issue 1, January/December 2024.
Abstract This study aims to evaluate the effect of different dietary fat sources on the quality of a Spanish‐cooked meat product Lomo de Sajonia (LSA) and its shelf‐life. Forty loins were selected from Iberian pigs fed four dietary treatments containing pork fat (G‐1), Greedy‐Grass Olive® (GGO) (enriched oleic‐acid oil) (G‐2), G‐2 and high oleic ...
Ainhoa Sarmiento‐García, Begoña Rubio, Beatriz Martinez, Juan‐José García, Ceferina Vieira   +4 more
wiley   +1 more source

Fenómenos de envejecimiento y oxidación a altas temperaturas en tres aceros inoxidables altamente aleados

Revista de Metalurgia, 1999
Se parte de tres aceros inoxidables austeníticos refractarios (25Cr20Ni, 21Cr11Ni(1), 21Cr11Ni(2)) y se estudian las cinéticas de oxidación al aire, hasta 50 h a 1.373 y 1.473 K.
J. Botella, J. Almagro, E. Otero, P. Hierro, C. Merino   +4 more
doaj   +1 more source

Comportamiento mecánico de materiales celulares de carburo de silicio

, 2022
Los materiales cerámicos celulares tienen un gran número de aplicaciones tecnológicas potenciales y pueden ser decisivos en multitud de procesos industriales a alta temperatura. Esto ha provocado que en los últimos años se hayan iniciado investigaciones sobre las propiedades mecánicas de dichos materiales: la alúmina, la cordierita, el SiC… La ...
openaire   +2 more sources