[PDF] Top 20 Braz. J. Chem. Eng. vol.21 número4

... Graphs in Figure 8 compare the experimental values of the moles of sorbitol (not used for training) and those values computed by the hybrid model in which the neural network that comp[r] ... See full document

... Despite the fact that for some polymers calculated values of Tg are very poor, it should be observed that the number of groups and pairs used for molecular description is relatively [r] ... See full document

... The kinetically controlled synthesis of ampicillin from phenylglycine methyl ester (PGME) and 6-amino penicillanic acid (6-APA), catalyzed by penicillin G acylase (PGA), was studied[r] ... See full document

... Analysing this figure, it can be observed that the dimensionless moisture content at the center of the spheroid has the same behaviour as the dimensionless average moisture content i[r] ... See full document

... where P and j c P respectively denote the calculated j e and measured values of the pressure at experimental point j. Points that caused a numerical problem in the parameter fitting procedure, such ... See full document

... Alonso, E., Cantero, F.J., García, J. and Cocero, M.J., Scale-up for a Process of Supercritical Extraction with Adsorption of Solute onto Active Carbon. Application to Soil Remediation, The Journal of ... See full document

... In order to illustrate the application of this method, pervaporation experiments for an isotropic PDMS membrane were conducted with aqueous solutions of ethyl acetate (113-2474 mg/L), an[r] ... See full document

... The slopes of experimental and UNIFAC- predicted data are similar for propionic acid-water- cyclohexanol and propionic acid-water-cyclohexyl acetate systems but different for propionic [r] ... See full document

... Taking into account the discussion above, the aim of this work is to study the potential of the Chapman- Enskog theory together with the WCA effective hard-sphere diameter formalism t[r] ... See full document

... The two-phase aqueous mixed (nonionic/ionic) micellar system, on the other hand, may be used to separate a target hydrophilic protein that partitions preferentially to the top, micel[r] ... See full document

... Rengasamy, P. and Oades, J.M., Interactions of Monomeric and Polymeric Species of Metal Ions with Clay Surfaces. III Aluminium (III) and Chromium (III), Aust. J. Soil Res., 16, 53 (1978). Tavani, E.L. and ... See full document

... The base experiment included the processing of a mixture of eucalyptus wood char and concentrated grape must under the following conditions: a particle size below 0.18 mm, a binder:ch[r] ... See full document

... This shows that Ergun’s correlation applied to all possible values of solid fractions does not allow the model to catch cluster formation and that the mean-referenced criterion of Sharm[r] ... See full document

... The main contribution of the present work is that it proposes a three-dimensional model capable of predicting the dispersion of effluents in open channels using a very fast in-house c[r] ... See full document

... The proposed solution was formulating a dynamic optimization problem, using a first- principles mathematical model, to maximize the acetylene conversion, ethylene selectivity, and unit[r] ... See full document

... In the present work, we measured the size of asphaltene flocculates in very dilute solutions of toluene and in mixtures of toluene–n heptane, during a long period of time, using the l[r] ... See full document

... Protein was entrapped by the dehydration-rehydration method, using lyophilization of preformed liposomes in order to prevent their degradation The reconstitution of lyophilized liposomes[r] ... See full document

... Initial reaction-rate assays in a pHstat at different concentrations of substrate were used to estimate kinetic and Michaelis-Menten parameters, k and K M.. Experimental data from long-t[r] ... See full document

... The reportedly facile Pichia pastoris heterologous protein production scale-up from shaking flasks to high cell concentrations in bioreactors is an advantageous characteristic of this [r] ... See full document

... The effects of the variables glutamine concentration, PMA concentration, percentage of Pluronic F68 (w/v) and percentage of FCS (v/v), and initial cell concentration were studied to eval[r] ... See full document