6 documents found, page 1 of 1
Avaliação química, ecotoxicológica e genotoxicológica de águas de cavas de mine...
Bárbara,Viníciu Fagundes; Tavares,Maria Gizelda de Oliveira; D’Alessandro,Natalia Cristina; Silva,Daniela de Melo e; Antoniosi Filho,Nelson RobertoRESUMO Lagos artificiais formados em áreas de mineração a céu aberto são unidades complexas e se constituem em passivos ambientais emergentes advindos da indústria da mineração. Embora estejam aumentando em número em várias partes do globo, são um problema ambiental recente e ainda pouco estudado, especialmente no tocante à qualidade e à toxicidade de suas águas, que podem apresentar riscos ambientais preocupan...
Avaliação da potencialidade de microalgas dulcícolas como fonte de matéria-prim...
Menezes,Rafael Silva; Leles,Maria Inês Gonçalves; Soares,Aline Terra; Franco,Pedro Ivo Brandão e Melo; Antoniosi Filho,Nelson RobertoIn this work, the fatty acid quantity and composition of six freshwater microalgae and soybean grains was determined by direct transesterification and gas chromatography analysis. The results showed that all the freshwater microalgae species presented a higher quantity of fatty acid than soybean grain. Choricystis sp. (A) provides 115% more fatty acids per gram of biomass than soybean grain. With regard to the ...
Antocianinas em extratos vegetais: aplicação em titulação ácido-base e identifi...
Guimarães,Wesson; Alves,Maria Isabel Ribeiro; Antoniosi Filho,Nelson RobertoAnthocyanins extracted from picao, quaresmeira, petunia, flamboyant, purple ipe, lobeira, pata de vaca, jaboticaba, purple cabbage and jambul were evaluated as natural acid-base indicators. Anthocyanins in extracts were identified using HPLC/MS. Clear, rapid change in color at final-point titration was observed for extracts but only picao showed strong change in pH. Indirect determination of carbonate in limest...
Sorption, solubility and residual monomers of a dental adhesive cured by differ...
Moreira,Francine do Couto Lima; Antoniosi Filho,Nelson Roberto; Souza,João Batista de; Lopes,Lawrence GonzagaThe aim of this study was to assess polymerization ability of three light-curing units by evaluating the influence of the light source, curing regimen and permeant (water or ethanol) on sorption, solubility and amount of residual monomers of a dental adhesive. Specimens of Adper Single Bond 2 were fabricated using a stainless steel circular matrix (8 mm x 1 mm). One quartz-tungsten-halogen (QTH) lamp and two li...
Desenvolvimento e aplicação de sistema passivo de coleta de poluentes atmosféri...
Brait,Carlos Henrique Hoff; Antoniosi Filho,Nelson RobertoThe objective of this study was to assess a new monitoring technique of particulate and trace metals in the atmosphere via the use of a passive sampler of air pollutants in the city of Goiânia. The average particulate weight and average concentrations of metals Fe, Cr, Zn, Pb, Cu, Mn, and Cd were 0.1104 g and 257.5; 23.4; 17.8; 6.7; 1.9; 0.8; 0.2 μg/m²/day, respectively. Higher Pb and Cr concentrations were obt...
Utilização de pelos de animais silvestres para monitoramento ambiental de Cd, C...
Brait,Carlos Henrique Hoff; Antoniosi Filho,Nelson Roberto; Furtado,Mariana MalzoniThis study investigates the use of wild animal hair of C. brachyurus, C. thous and L. pardalis as biomonitors of trace metal at Parque Nacional das Emas, Brazil. Results reveal a strong correlation between Cd and Pb as well as Cu and Zn, which suggests a single source of emission. Most metals showed a lower or equal concentration than those obtained in previous studies. The research shows that monitoring may be...