A5085138779- Chemical and Physical Properties in Aqueous Solutions
- Protein Hydrolysis and Bioactive Peptides
- Thermodynamic properties of mixtures
- Enzyme Catalysis and Immobilization
- Crystallization and Solubility Studies
- Enzyme Production and Characterization
- Proteins in Food Systems
- Ionic liquids properties and applications
- Aquaculture Nutrition and Growth
- Polysaccharides Composition and Applications
- Meat and Animal Product Quality
- Analytical Chemistry and Chromatography
- Agricultural Engineering and Mechanization
- Sensory Analysis and Statistical Methods
- Pineapple and bromelain studies
- Food Drying and Modeling
- Insect Utilization and Effects
- Fluoride Effects and Removal
- Extraction and Separation Processes
- Surfactants and Colloidal Systems
- Food and Agricultural Sciences
- Electrochemical sensors and biosensors
- Adsorption and biosorption for pollutant removal
- Carbohydrate Chemistry and Synthesis
- Agricultural and Food Sciences
Southwest Bahia State University
2014-2024
Universidade Federal de Viçosa
2013
Abstract BACKGROUND The objective of this research was to compare the efficiency pepsin immobilization by adsorption and covalent binding on biochar obtained from pupunha palm processing residue, use immobilized enzyme in hydrolysis bovine casein. RESULTS surface modification with glutaraldehyde effective, as shown Fourier transform infrared analyses texture properties carbons. Both activated functionalized showed high (>95%) enzyme‐support capacity (>96 mg g –1 ). During activity...
Although enzymes have been used for thousands of years, their application in industrial processes has gained importance since the 20th century due to technological and scientific advances several areas, including biochemistry [...]
Liquid–liquid equilibrium data and phase diagrams of new aqueous two-phase systems (ATPS's), composed water + sodium hydroxide poly(ethylene glycol) (PEG) molar masses (1450, 4000, or 10 000) g·mol–1, were determined at (288.2, 298.2, 308.2) K. The effects temperature PEG mass on the studied. It was found that an increase in caused expansion region increased slope length tie line. also observed binodal curves shifted toward origin with mass.
In order to design and adapt equipments for food processing, it is essential know thermophysical properties. Once temperature composition affects these properties, models based in such factors are important further calculation. this work, density dynamic viscosity of bovine milk, probably the most processed fluid world, were determined within large ranges major constituents (moisture, fat, lactose, protein minerals), on typical processing values. Density varied from (962.01 1100.45) kg/m3...
Experimental equilibrium data were obtained for aqueous two-phase systems composed of polyethylene glycol 400 g·mol–1 + sodium phosphate, and citrate, at T = (298.2, 308.2 318.2) K. For the system formed by studied range, temperature effect on position binodal curves was not relevant. increase caused an expansion biphasic region. The efficacy salts in inducing phase segregation follows order phosphate > citrate temperatures (298.2 308.2) Energy interaction parameters NRTL UNIQUAC models...
Liquid–liquid equilibrium data of aqueous two phase systems (ATPS) composed polyethylene glycol (PEG) 1500 g·mol–1 + sodium sulfate water at T = (293.15, 303.15 and 313.15) K p 0.1 MPa were determined. The density the top bottom phases tie-lines (TL) was universal functional activity coefficient (UNIFAC) model correlated to experimental tie-line data, root-mean-square deviations (RMSD) between calculated considered in calculation. salting-out effect evaluated using effective volume (EEV)....
Liquid–liquid equilibrium data and phase diagrams of aqueous two systems (ATPS) composed polyethylene glycol (PEG) molar mass (1500 4000) g·mol –1 + sodium sulfate water were determined at temperatures 293.15, 303.15, 313.15, 323.15 K pH 2. Temperature had no significant effect on the biphasic region, indicating a small enthalpic contribution in separation process. The change temperature however caused an increase tie line slope because molecules transferred from upper to lower phase....
Liquid–liquid equilibrium data of aqueous two-phase systems (ATPS) composed polyethylene glycol (PEG) 8000 + sodium sulfate water, PEG ammonium and magnesium water at T = 298.15, 308.15, 318.15 K pH 2.0 were determined. The universal function activity coefficient (UNIFAC) model was correlated to the experimental tie-line data, root-mean-square deviations (RMSDs) between calculated considered in calculation. effects temperature cation type on spinodal curves evaluated. salting-out effect...
Abstract The sizing of equipment used in food processing, particularly heat exchangers and other that require pumping products, requires accurate data thermophysical properties. Milk is one the most processed liquid fluids world currently on its properties are limited. In a previous paper (Alcântara et al., 2010) density dynamic viscosity bovine milk were presented how these affected by temperature composition, ranges commonly encountered processing. Here thermal diffusivity specific for...
The α-amylase enzyme was produced by solid state fermentation (SSF) and its partition behavior in Aqueous Two-Phase Systems (ATPS) determined using systems consisting of polyethylene glycol (PEG) potassium phosphate buffer. To determine the best conditions for production, a central composite design constructed two independent variables: time moisture content, study, face-centered (CCF) with four PEG molecular weight, pH, temperature time. It indicated that production were 35.0 hours 45.7%...
This work presents a detailed analysis of the adsorption process royal dianix CC blue dye on biochars, synthesized from bark cupuaçu, lignocellulosic residue generated by food industry.The biochars were activated with KOH or H 3 PO 4 and carbonized at temperature 450°C.The kinetic parameters, diffusion coefficients, equilibrium data, thermodynamic parameters also determined.The chemical physical properties porous materials affected activating agent used.The adjustment models to experimental...
Abstract Nowadays ionic liquids (ILs), because of their “green” characteristics, have been used for analytical and separation processes. Therefore the partitioning lysozyme α-lactalbumin using aqueous two-phase systems (ATPSs) composed an liquid (chloride 1-ethyl-3-methylimidazolium) inorganic salts (K 2 HPO 4 , KH PO ) was studied. Phase equilibrium diagrams were obtained to explore effect different temperatures (293.15, 303.15, 313.15, 323.15) K pH (7.5, 8.0, 8.5) studies. For both...
Aqueous systems composed of ionic liquid make up a new alternative for use in processes involving the separation biomolecules. The objective this experiment was to obtain thermo-physical properties density, refractive index, electrical conductivity, molar volume, thermal expansion coefficient and apparent specific volume 1-ethyl-3-methylimidazolium chloride. aqueous solutions were measured as function mass fraction w = (0.05, 0.125, 0.2, 0.275 0.35), temperature T (293.15, 303.15, 313.15...