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تعداد نتایج: 9195717 فیلتر نتایج به سال:
One of the main barriers blocking sustainable hydrogen production is the use of expensive platinum-based catalysts to produce hydrogen from water. Herein we report the cost-effective synthesis of catalytically active, nitrogen-doped, cobalt-encased carbon nanotubes using inexpensive starting materials-urea and cobalt chloride hexahydrate (CoCl2·6H2O). Moreover, we show that the as-obtained nano...
A 900-MHz phase-locked loop frequency synthesizer implemented in a 0.6m CMOS technology is developed for the Wireless Integrated Network Sensors applications. It incorporates an automatic switched-capacitor (SC) discrete-tuning loop to extend the overall frequency tuning range to 20%, while the VCO gain ( VCO) resulting from the CMOS varactor continuous-tuning is kept low at only 20 MHz/V in or...
EDNEI DE ALMEIDA MERCÊS, FELIPE CAMURUGI, GILVANA SANTOS BARRETO, MIRCO SOLÉ & FLORA ACUÑA JUNCÁ 1Programa de Pós-graduação em Zoologia, Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Av. Transnordestina, 44036–900, Feira de Santana, Bahia, Brasil. 2Programa de Pós-graduação em Ciências Biológicas, Departamento de Sistemática e Ecologia, Centro de Ciências Exata...
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