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Diazinon is commonly used for pest control in the agricultural fields because of its relatively low cost and high efficiency. Due to the increasing application of pesticides, reliable and accurate analytical methods are necessary for their monitoring. This work was aimed to design the high selective electrochemical sensor for determining of diazinon in biological and environmental samples. The ...
RESUMO Este artigo aborda aspectos da trajetória pessoal e escolar de um aluno EJA, em situação analfabetismo. Para tratar desses aspectos, procuramos responder esta pergunta: como se configura o patrimônio vivencial educando 20 anos idade, na atividade alfabetização, contexto escolar? Buscando respondê-la, escolhemos, fundamentação teórica, as noções perezhivanie (VYGOSTKY, 2010; REY, 2016; VE...
Growth mechanism of epitaxial SrTiO3 on a (1 × 2) + (2 × 1) reconstructed Sr(1/2 ML)/Si(001) surface
We prove two conjectures of Brändén on the real-rootedness of the polynomials Qn(x) and Rn(x) which are related to the Boros-Moll polynomials Pn(x). In fact, we show that both Qn(x) and Rn(x) form Sturm sequences. The first conjecture implies the 2-log-concavity of Pn(x), and the second conjecture implies the 3-log-concavity of Pn(x). AMS Classification 2010: Primary 26C10; Secondary 05A20, 30C15.
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The research focused on the hydrothermal synthesis of a material based Kesterite structure Cu2ZnSnS4 (CZTS). For this purpose, component cations, in concentrations 1.0 molL-1, were placed steel autoclave under different temperatures conditions (200, 220, 240, 260 and 280°C) for 32 h. After, solids calcined at 400°C 2 UV-VIS results showed that materials had strong tendency to absorb region 600-...
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