TY - GEN
T1 - Neural observer to trehalose estimation
AU - Cabrera, Agustin
AU - Aranda-Barradas, Juan Silvestre
AU - Chairez Oria, Isaac
AU - Ramirez-Sotelo, Guadalupe
PY - 2008
Y1 - 2008
N2 - These It is generally accepted in yeast production industry that intracellular trehalose is an indicator of yeast fermentation capacity and viability. The disaccharide trehalose is a cytoplasmic compound, so it must be quantified after extraction by means of an off-line analytical method during a biomass production process. Thus, knowing experimental determinations of yeast trehalose content is always delayed; hence no opportune actions can be implemented in order to lead the production process toward a high intracellular trehalose concentration in the produced biomass. An attempt of predicting trehalose concentration in yeast cells through two different mathematical approaches is presented. On the one hand, a biomass and trehalose concentrations estimator was developed with a differential neural network technique. On the other hand, a structured model results are analyzed for explaining the main metabolic events that induce a trehalose accumulation in cells. Our results allow us to think that the coupling of both methods can provide acceptable information aimed at reaching high trehalose content in yeast. Indeed, by integrating the two alternatives, a trehalose-enriched yeast production process could be successfully driven.
AB - These It is generally accepted in yeast production industry that intracellular trehalose is an indicator of yeast fermentation capacity and viability. The disaccharide trehalose is a cytoplasmic compound, so it must be quantified after extraction by means of an off-line analytical method during a biomass production process. Thus, knowing experimental determinations of yeast trehalose content is always delayed; hence no opportune actions can be implemented in order to lead the production process toward a high intracellular trehalose concentration in the produced biomass. An attempt of predicting trehalose concentration in yeast cells through two different mathematical approaches is presented. On the one hand, a biomass and trehalose concentrations estimator was developed with a differential neural network technique. On the other hand, a structured model results are analyzed for explaining the main metabolic events that induce a trehalose accumulation in cells. Our results allow us to think that the coupling of both methods can provide acceptable information aimed at reaching high trehalose content in yeast. Indeed, by integrating the two alternatives, a trehalose-enriched yeast production process could be successfully driven.
KW - Kinetic modelling and control of biological systems
KW - Metabolic engineering
KW - Parameter and state estimation
UR - http://www.scopus.com/inward/record.url?scp=79961018404&partnerID=8YFLogxK
U2 - 10.3182/20080706-5-KR-1001.3944
DO - 10.3182/20080706-5-KR-1001.3944
M3 - Contribución a la conferencia
AN - SCOPUS:79961018404
SN - 9783902661005
T3 - IFAC Proceedings Volumes (IFAC-PapersOnline)
BT - Proceedings of the 17th World Congress, International Federation of Automatic Control, IFAC
T2 - 17th World Congress, International Federation of Automatic Control, IFAC
Y2 - 6 July 2008 through 11 July 2008
ER -