Results 41 to 50 of about 116,136 (195)

Fiesta química: licores que no lo son, bebidas que no hay que beber y alguna cosa de comer

Revista Eureka sobre Enseñanza y Divulgación de las Ciencias, 2011
Se describen cuatro experimentos de reacciones químicas y propiedades de las soluciones presentados en forma lúdica, con la finalidad primero de atraer la atención para inmediatamente después provocar la reflexión acerca del fenómeno observado.
Josep Corominas
doaj  

Influence of Carbon Nanoparticles on Electrically Induced Wear of Grease‐Lubricated Steels

Advanced Materials Interfaces, EarlyView.
When an electric current enters a pair of rubbing surfaces, enormous damage takes place. In this research, how such damage occurs in the presence of protective grease and the mitigation with added carbon nanoparticles, were investigated. It was discovered that those particles regulate transport and interfacial electrical stability of the grease ...
Mohammad Humaun Kabir, Darrius Dias, Jacob Bons, MD Wasek Foysal, Evan Johnson, Joe Kosmoski, Hong Liang   +6 more
wiley   +1 more source

ANÁLISIS FISICOQUÍMICO DE COMBUSTIBLES LÍQUIDOS OBTENIDOS EN EL PROCESO DE PIROLISIS DE CAUCHO VULCANIZADO

La Granja: Revista de Ciencias de la Vida, 2017
En el análisis del combustible pirolítico (combustibles líquidos obtenidos a partir del proceso de pirólisis de residuos de neumáticos usados), las características fisicoquímicas corresponden a fracciones de gasolina, queroseno y diésel, para determinar ...
Myriam Ximena Mancheno Cárdenas, Pablo Arévalo, Jhison Romero, Inés Malo, Damian Matute, Ricardo Ramos   +5 more
doaj   +1 more source

Thermal Radiation Emission From 3D Graphene Networks

Advanced Materials Interfaces, EarlyView.
Three‐dimensional graphene networks are demonstrated as exceptional broadband thermal emitters, exhibiting high‐intensity, spectrally homogeneous emission and strong mechanical flexibility compared to conventional emitters like silicon carbide.
Maria Chiara Paolozzi, Emanuele Scoppi, Jacopo Sera, Salvatore Macis, Antonio Grilli, Samuel Jeong, Yoshikazu Ito, Stefano Lupi   +7 more
wiley   +1 more source

HEAVY HYDROCARBON-COAL SURFACTANT-WATER-CCTA MIXTURE TECHNOLOGY. SEMI-INDUSTRIAL EVALUATION

CT&F Ciencia, Tecnología & Futuro, 1999
Using low viscosity inverse emulsion (o/w) technology of fuel oil in water, developed at the Instituto Colombiano del Petróleo, ICP, a synergy with the Coal-Surfactant-Water (CCTA) systems was established, yielding a new fuel mixture caled CCTA, Coal ...
G LEAL, J. L GROSSO, O. J SUÁREZ, F GUARÍN, M FORERO, H VIDALES, R BARRERO, E. K GUZMÁN, E AFANADOR, J CORREDOR   +9 more
doaj  

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Biomasa residual vegetal: tecnologías de transformación y estado actual

Innovaciencia, 2014
La biomasa residual vegetal es una alternativa para la producción de energía a nivel mundial. La conversión de los residuos vegetales en alguna forma energética requiere la aplicación de tecnologías que estén acorde a lo expresado en el numeral IV ...
Pedro Elías Patiño Martínez
doaj   +1 more source

Additively Manufactured Porous Ceramics as Tunable Dielectrics for Passive Temperature Sensing

Advanced Materials Technologies, EarlyView.
Porous ceramic lattices, 3D‐printed from a multicomponent oxide ink, are integrated with LC resonators for passive wireless temperature sensing. By tuning porosity, the dielectric properties and RF response are engineered to produce distinct resonant frequency shifts with temperature. The results establish a structure‐driven approach to customizing the
Sogol Heidarishahrivar, Aminul Islam, Chang Woo Gal, Insup Kim, Yeong‐Jin Choi, Woo Soo Kim   +5 more
wiley   +1 more source

An Approach to Optimal Control of the Combustion System in a Reverberatory Furnace

TecnoLógicas, 2009
In this work an optimal control technique is applied to control the excess air in the combustion process of a reverberatory furnace by the monitoring of O2 percentage in the stack, the controller is designed based on a nonlinear model estimated by ...
Henry Copete-López, Santiago Sánchez-Acevedo   +1 more
doaj  

Record Performance in Vertically Stacked, Solution‐Processed ZTO Schottky Diodes

Advanced Materials Technologies, EarlyView.
Schottky diodes based on solution processed sustainable zinc—tin–oxide thin films present an eco‐friendly and versatile alternative to conventional CMOS based technologies. Beyond state‐of‐the‐art performance for vertically stacked solution‐based oxide diodes was achieved, including rectification ratios exceeding nine orders of magnitude, and intrinsic
Carlos Silva, Asal Kiazadeh, Raquel Azevedo Martins, António Dias, Jorge Martins, Luís Mendes, João Vaz, Rodrigo Martins, Elvira Fortunato, Emanuel Carlos, Jonas Deuermeier   +10 more
wiley   +1 more source