Biomass gasification is a technology that has attracted great interest in synthesis of biofuels and oxo alcohols. However, this gas contains several contaminants, including tar, which need to be removed. Removal of tar is particularly critical because it can lead to ope...

Os autores redescrevem e apresentam figuras originais do exemplar tipo de Stephanoprora singularis (Lutz, 1924) propondo uma nova combinação: Equinoparyphium singularis (Lutz, 1924) comb. n. The authors redescribe and present original figures of the type of S. singulari...

The electrons found in Dirac materials are notorious for being difficult to manipulate due to the Klein phenomenon and absence of backscattering. Here we investigate how spatial modulations of the Fermi velocity in two-dimensional Dirac materials can give rise to locali...

White rice husk ash (WRHA) and black rice husk ash (BRHA) were incorporated as filler in natural rubber (NR) compounds. A conventional vulcanization system (CV) was chosen and cure studies were carried out on a TI-100 Curometer at 150, 160, 170 and 180°C. From the rheom...

This study aimed to investigate the leaching of potassium (K+) from the soil (Oxisol) and to evaluate the efficiency of uptake of this ion with the addition of minerals with high cation exchange capacity (CEC), such as vermiculite and zeolite. Oxisol samples collected i...

Este artigo objetiva apresentar um “estado do conhecimento” a partir de teses que articulam a aritmetica com o Movimento da Matematica Moderna e a Historia da Educacao Matematica no ensino primario brasileiro no periodo de 1950 a 1970. Trata-se de resultados parciais de...

A partir dos anos 70 e 80 do seculo passado, o advento dos estudos clinicos aleatorizados e de grandes coortes, associado ao desenvolvimento da metodologia para realizacao de revisoes sistematicas e metanalises, provocou uma revolucao na forma de pensar e realizar a pra...

Aim After several years of the introduction of the single antigen bead assay (SAB), no consensus have been reached about the most reliable way to interpret its positive results and many different protocols have been tested (denatured beads, EDTA, heat, dilutions, C1q an...

Com o intuito de avaliar a submissão de consultas em língua natural, especificamente em português, a máquinas de busca na Web, e contrastar com as consultas por palavras-chave, realizou-se um experimento com alunos, professores e funcionários de uma universidade brasile...