7 research outputs found
Modelling human choices: MADeM and decision‑making
Research supported by FAPESP 2015/50122-0 and DFG-GRTK 1740/2. RP and AR are also part of the Research, Innovation and Dissemination Center for Neuromathematics FAPESP grant (2013/07699-0). RP is supported by a FAPESP scholarship (2013/25667-8). ACR is partially supported by a CNPq fellowship (grant 306251/2014-0)
InfluĂŞncia do pH e temperatura sobre a atividade amilolĂtica de rizĂłbios isolados de solos da AmazĂ´nia Influence of pH and temperature on amylolytic activity of rhizobia isolated from Amazonian soils
Poucas sĂŁo as informações referentes ao perfil enzimático de bactĂ©rias rizobiais. Em meio de cultura solidificado, foi conduzido um experimento em fatorial 7 x 3 x 3 para avaliar o efeito do pH (5,0; 6,5 e 8,0) e da temperatura (25, 35 e 42 ÂşC) sobre a atividade amilolĂtica de sete isolados de rizĂłbio. As maiores atividades amilolĂticas foram observadas em ambientes ácidos, com algumas bactĂ©rias tambĂ©m produzindo nĂveis significativos em pH 8,0. Entre as interações significativas (P<0,01), os isolados INPA R-110 e R-822 apresentaram máximas atividades em pH 5,0 e 25 ÂşC, com o R-822 tambĂ©m sendo um bom produtor de amilase nas temperaturas de 35 e 42 ÂşC. Em termos gerais, os isolados INPA R-110 e R-822 foram os melhores produtores de amilases, com atividades enzimáticas maiores do que 2,0.<br>Information is scarce regarding the enzymatic profiles of rhizobia bacteria. On solid medium, a 7 x 3 x 3 factorial experiment was conducted to evaluate the effect of pH (5.0, 6.5 and 8.0) and temperature (25, 35 and 42 ÂşC) on amylase activities of seven rhizobia strains. The highest enzymatic activities were found in acid environments, with some bacteria also producing significant levels at pH 8.0. Among the significant interactions (P<0.01), INPA strains R-110 and R-822 exhibited maximum activities at pH 5.0 and 25 ÂşC, with the R-822 being also a good amylase producer at 35 and 42 ÂşC. In general terms, INPA strains R-110 and R-822 were the best enzyme producers, with amylolytic enzymatic activities higher than 2.0