Microondas em síntese orgânica [PDF]
Química 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.
Antônio Manzolillo Sanseverino
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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
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
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
BENZILAÇÃO DO GLICEROL COM AQUECIMENTO POR MICROONDAS
Cadernos de Pesquisa, 2013 A infinidade de aplicações da glicerina incentivou inúmeras pesquisas voltadas ao reaproveitamento do principal coproduto do biodiesel. Destaca-se a produção de aditivos oxigenados para combustíveis, como os éteres, os acetais e os ésteres de glicerina ...
Mitchell González Soares da Silva +5 more
doaj +4 more sources
Experimentos didáticos envolvendo radiação microondas [PDF]
Química Nova, 2004 Theoretical and practical aspects of the use of microwave-assisted strategies in chemistry are introduced for students using simple and safe experiments employing a domestic oven. Three procedures are proposed for evaluating the distribution of microwave radiation inside the microwave oven cavity: (1) variation of the volume of marshmallows; (2) drying
Fabiana Rosini +2 more
openalex +6 more sources
Microwaves by spark. Optical experiments with microwaves produced with a home-made equipment [PDF]
Revista Eureka sobre enseñanza y divulgación de las ciencias., 2011 La teoría del campo electromagnético fue el gran logro unificador del siglo XIX. Los experimentos de Hertz probaron la validez de la teoría y mostraron la existencia de otras ondas distintas a la luz pero con sus mismas propiedades.
Del Mazo Vivar, Alejandro
core +6 more sources
Filmes finos de SrBi2Ta2O9 processados em forno microondas SrBi2Ta2O9 thin films processed in microwave oven [PDF]
Cerâmica, 2003 Filmes finos de SrBi2Ta2O9 foram depositados em substratos de Pt/Ti/SiO2/Si e, pela primeira vez, sinterizados em forno microondas doméstico. Os padrões de difração de raios X mostraram que os filmes são policristalinos.
J. S. Vasconcelos +6 more
doaj +2 more sources
Caracterização térmica e reológica de borracha de pneu desvulcanizada por microondas Thermal and rheological characterization of ground tire rubber devulcanized by microwaves [PDF]
Polímeros, 2006 Borracha de pneu pós-consumo previamente particulada foi submetida a um tratamento em microondas, de forma a promover a quebra de suas ligações cruzadas, ou seja, sua desvulcanização.
Carlos H. Scuracchio +2 more
doaj +2 more sources
Síntesis de whiskers de SiC asistida por microondas
Boletín de la Sociedad Española de Cerámica y Vidrio, 2013 We developed a new process for the synthesis of SiC whiskers assisted by microwaves; this is based on the mixture of silica xerogels and graphite powder. As energy source were used microwaves of 2.45 GHz and 1.0 kW of power RMS.
Garza-Méndez, F. J. +3 more
doaj +4 more sources