Results 1 to 10 of about 58,693 (210)
Green synthesis of biomass-derived carbon quantum dots for photocatalytic degradation of methylene blue [PDF]
Beilstein Journal of NanotechnologyWater pollution, significantly influenced by the discharge of synthetic dyes from industries, such as textiles, poses a persistent global threat to human health.
Dalia Chávez-García +3 more
doaj +2 more sources
The Impact of Cognitive Anxiety and the Rating of Pain on Care Processes in a Vigilance Task: The Important Part Played by Age. [PDF]
Pain Res Manag, 2020 Chronic pain is a serious public health problem that has grown exponentially in recent years, which is why it has received the attention of numerous researchers. Most of the studies in the field of chronic pain have focused on care as a mediating variable on the perception of painful stimuli and emotions.
Pinel L +4 more
europepmc +2 more sources
Metamateriales en microondas y antenas [PDF]
Buran, 2003 Desde la década de los '80 una gran variedad de materiales artificiales (no existentes en la naturaleza) son intensivamente estudiados por sus inusitadas y sorprendentes propiedades electromagnéticas (como partes reales de permitividad eléctrica y ...
González Arbesú, José María +2 more
core +5 more sources
Microondas em síntese orgânica [PDF]
Quimica Nova, 2002 The application of microwave heating to organic synthesis is presented in a concise manner. Issues such as the history of the microwave oven, dielectric heating, reactions techniques (dry reactions, MORE chemistry), domestic ovens, microwave reactors, microwave effect and control of selectivities are discussed.
exaly +5 more sources
Antenas reflectoras en microondas
, 2013 Existen muchas aplicaciones a frecuencias de microondas y milimétricas, entre las que cabe destacar las comunicaciones espaciales, sistemas de radar y sistemas de radioastronomía. En dicho margen de frecuencias, donde las longitudes de onda son del orden de centímetros y milímetros, las dimensiones de las antenas pueden ser de varias longitudes de onda.
exaly +3 more sources
Caracterização de enlace de microondas [PDF]
, 2021 Monografia (graduação)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2002. ; O tráfego da RedUnB utiliza uma fibra óptica, com taxa de transmissão de 2 Mbps, e se conecta com a Rede Nacional de Pesquisa.
Francisco, Cecília Magalhães +1 more
openaire +2 more sources
IEEE Access, 2021 This paper presents a lumped-element equivalent circuit model of microstrip lines loaded with dumbbell defect-ground-structure (DB-DGS) resonators, etched in the ground plane.
Lijuan Su +5 more
doaj +1 more source
Qualification and Validation of the performances of the SAR instrument on board PAZ
Revista de Teledetección, 2016 PAZ is a satellite with a highly flexible X band SAR as primary instrument. The radar is capable of generating high quality SAR images with sizes ranging from 5 km to 200 km and resolutions from 30 m for products with high coverage to values around 1m or
J. Closa-Soteras +4 more
doaj +1 more source
Determination of capsaicinoids in peppers by microwave-assisted extraction-high-performance liquid chromatography with fluorescence detection [PDF]
, 2006 En este trabajo se ha desarrollado una técnica de extracción de capsaicinoides en pimientos mediante la extracción asistida por ...
Agrawal +33 more
core +2 more sources
Molienda asistida con microondas de un coque metalúrgico
Revista de Metalurgia, 2014 Los coques metalúrgicos están compuestos mayoritariamente de carbono grafítico (s2p2) y diferentes compuestos inorgánicos con distintas capacidades de absorber la radiación de microondas.
Esteban Ruisánchez +4 more
doaj +1 more source