|
|
|
|
|
| Bettin,Fernanda; Cousseau,Francine; Martins,Kamila; Zaccaria,Simone; Girardi,Viviane; Silveira,Mauricio Moura da; Dillon,Aldo José Pinheiro. |
| (1) Background: In this study, the effects of different pH values (2.4, 3.2, 4.4 and 5.0), temperatures (30, 35, 40, 45 and 50°C) and agitation (100 rpm) on the enzymatic decolourisation of twenty-two dyes belonging to the chromophore groups anthraquinone, azo and triphenylmethane were assessed. (2) Methods: In all conditions, it was used a crude enzyme broth containing 30 U mL-1 laccases produced by Pleurotus sajor-caju PS-2001 in submerged process. (3) Results: Regarding the effects of pH values, the best results were obtained at pH 3.2 and 30°C, in which bleaching was observed for all dyes evaluated. In assays conducted at different temperatures, highest levels of decolourisation were observed at 35°C and pH 3.2 for nineteen of the dyes assessed.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pleurotus sajor-caju; Laccases; Dye decolourisation; Anthraquinone; Azo; Triphenylmethane. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100204 |
| |
|
| |
|
| |
|
|
| Erzinger,Gilmar Sidnei; Silveira,Mauricio Moura da; Costa,José Paulo Castilho Lopes da; Vitolo,Michele; Jonas,Rainer. |
| Previously grown cells of the ethanologenic bacterium Zymomonas mobilis produce sorbitol and gluconic acid, in reactions catalysed by the periplasmic enzymes glucose-fructose oxidoreductase (GFOR) and glucono-delta-lactonase (GL). The GFOR/GL system activity, in cells to be used in this bioconversion, depends on growth conditions. In batch runs, with initial glucose concentrations (S0) from 42 to 230 g/L, the highest specific and total GFOR/GL activities were obtained with S0 = 153 g/L (12.6 U/g cells and 62 U/L). Higher S0 led to decreasing activities in fresh cells. With S0 = 209 g/L, the final specific activity was only 7.0 U/g. After disruption of cells, however, an activity over 15 U/g was revealed. Since growth inhibition with S0 over 153 g/L was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zymomonas mobilis; Glucose-fructose oxidoreductase; Glucose. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000400008 |
| |
|
| |
|
|
| Sandri,Ivana Greice; Piemolini-Barreto,Luciani Tastch; Fontana,Roselei Claudete; Silveira,Mauricio Moura da. |
| In the present study, the effect of pectinases on the production of pulp and juice of araçá and the presence of bioactive compounds were evaluated. An enzyme extract (EE) produced by Aspergillus niger LB-02-SF in solid state fermentation and the commercial enzyme Ultrazym®AFP-L were used in this study. After enzyme treatment with the EE preparation, the extraction yield increased by 23.1% and viscosity decreased by 42.8%, during pulp maceration. During juice processing, there was an increase of 70.6% in clarification and a decrease of 72.87% in turbidity. Higher values of these parameters, 47.7, 69.0, 80.7, and 79.7%, respectively, were obtained using the Ultrazym®AFP-L, which also led to a significant increase in the polyphenol content, both in the pulp... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus niger; Yield; Clarification; Bioactive compounds. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000400002 |
| |
|
|
|
