5 documents found, page 1 of 1
Kinetic Study of a Bacterial Cellulose Production by Komagataeibacter Rhaeticus...
Souza,Karina Carvalho de; Trindade,Nicolas Mattos; Amorim,Júlia Didier Pedrosa de; Nascimento,Helenise Almeida do; Costa,Andréa Fernanda SantanaAbstract Biotechnology can be used to convert waste into valuable products. In this context, there is bacterial cellulose (BC), a natural biopolymer that can be transformed into several useful materials, but its production is limited due to the high cost of the culture media used for its industrialization. In this work, BC was produced from the bacteria Komagataeibacter rhaeticus, using coffee grounds, sugarcan...
Optimization of the osmotic dehydration of ginger
Siqueira,Leonardo Pereira de; Sarubbo,Leonie Asfora; Shinohara,Neide Kazue Sakugawa; Valencia,Marcela Sarmento; Cortez,Neila Mello SantosABSTRACT: The present research aimed to optimize the process of osmotic dehydration (OD) of ginger with hypertonic sucrose solution employing response surface methodology. A 23 experimental planning was carried out and 17 experimental assays were performed based on three independent variables (temperature, concentration of the osmotic solution and immersion time) and three dependent variables (moisture loss (ML...
Partition of proteins in aqueous two-phase systems based on Cashew-nut tree gum...
Sarubbo,Leonie Asfora; Oliveira,Luciana Alves de; Porto,Ana Lúcia Figueiredo; Campos-Takaki,Galba Maria de; Tambourgi,Elias BasileThe partitioning of two proteins, bovine serum albumin (BSA) and trypsin was studied in an aqueous poly(ethylene glycol)(PEG)- Cashew-nut tree gum system. The phase diagram was provided for Cashew-nut tree gum and PEG molecular weight of 1500 at two different temperatures. The influence of several parameters including concentrations of polymers, pH, salt addition and temperature on the partitioning of these pro...
Recovery of ascorbic oxidoreductase from crude extract with an aqueous two-phas...
Porto,Ana Lúcia Figueiredo; Sarubbo,Leonie Asfora; Moreira,Keila Aparecida; Melo,Homero José Farias de; Lima-Filho,José Luís; Campos-Takaki,Galba MariaA continuous perforated rotating disc contactor was used to extract the enzyme ascorbic oxidoreductase (E.C.1.10.3.3) from crude extract of Curcubita maxima with an aqueous two-phase system of poly (ethylene glycol) and phosphate salts. The effect of dispersed phase velocity on either protein mass transfer coefficients or separation efficiency at 1, 2 and 3 mL/min was studied. An increase of the mass transfer c...
Production of extracellular proteases by Mucor circinelloides using D-glucose a...
Andrade,Vânia Sousa; Sarubbo,Leonie Asfora; Fukushima,Kasutaka; Miyaji,Makoto; Nishimura,Kazuko; Campos-Takaki,Galba Maria deRecently, some Mucorales species have been reported as protease producers. The production of extracellular proteases by Mucor circinelloides using glucose as substrate was studied. Experiments were carried out with different D-glucose concentrations (40, 60 and 80 g/L). Biomass, pH and protease activity were determined. Although biomass production had reached best yields for the medium containing D-glucose in a...