| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000308937 |
| ISSN: | 0104-6632 |
| Authors: | Bravo, S1 Diez, M.C Shene, C |
| Institutions: | 1Universidad de La Frontera, Departamento de Ingeniería Química, Temuco, Cautín. Chile |
| Year: | 2004 |
| Season: | Dic |
| Volumen: | 21 |
| Number: | 4 |
| Pages: | 509-518 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | A hybrid neural network model for simulating the process of enzymatic reduction of fructose to sorbitol process catalyzed by glucose-fructose oxidoreductase in Zymomonas mobilis CP4 is presented. Data used to derive and validate the model was obtained from experiments carried out under different conditions of pH, temperature and concentrations of both substrates (glucose and fructose) involved in the reaction. Sonicated and lyophilized cells were used as source of the enzyme. The optimal pH for sorbitol synthesis at 30º C is 6.5. For a value of pH of 6, the optimal temperature is 35º C. The neural network in the model computes the value of the kinetic relationship. The hybrid neural network model is able to simulate changes in the substrates and product concentrations during sorbitol synthesis under pH and temperature conditions ranging between 5 and 7.5 and 25 and 40º C, respectively. Under these conditions the rate of sorbitol synthesis shows important differences. Values computed using the hybrid neural network model have an average error of 1.7·10-3 mole |
| Disciplines: | Química |
| Keyword: | Ingeniería química, Biotecnología, Fructosa, Reducción enzimática, Sorbitol, Zymomonas mobilis, Modelos de simulación, Redes neuronales |
| Keyword: | Chemistry, Chemical engineering, Biotechnology, Fructose, Enzymatic reduction, Sorbitol, Zymomonas mobilis, Simulation models, Neural networks |
| Full text: | Texto completo (Ver HTML) |
