In this study, the performance and separation characteristics of four macroporous resins for purifying
umami peptides from soy sauce were examined. Results showed that the resins could separate the peptides
of soy sauce, and the particle diffusion kinetics model was suitable for describing the whole
exothermic (DH < 43 kJ/mol) adsorption process on the SP-825 and HP-20 resins, while the pseudo-second-
order kinetics model accurately described the XAD-16 and HP-2MGL resins. Furthermore, the adsorption
processes of the peptides followed the Freundlich model. The XAD-16 resin was the most effective
resin for the enrichment of peptides due to its high adsorption and total desorption capacities.
Interestingly, the umami peptides were enriched in the deionized water fraction. This study provides
new insights into exploring performance and separation characteristics of macroporous resins on soy
sauce, and indicated that peptide may be the contributor to the umami taste in Chinese soy sauce.
2015 Elsevier Ltd. All rights reserved
In this study, the performance and separation characteristics of four macroporous resins for purifyingumami peptides from soy sauce were examined. Results showed that the resins could separate the peptidesof soy sauce, and the particle diffusion kinetics model was suitable for describing the wholeexothermic (DH < 43 kJ/mol) adsorption process on the SP-825 and HP-20 resins, while the pseudo-second-order kinetics model accurately described the XAD-16 and HP-2MGL resins. Furthermore, the adsorptionprocesses of the peptides followed the Freundlich model. The XAD-16 resin was the most effectiveresin for the enrichment of peptides due to its high adsorption and total desorption capacities.Interestingly, the umami peptides were enriched in the deionized water fraction. This study providesnew insights into exploring performance and separation characteristics of macroporous resins on soysauce, and indicated that peptide may be the contributor to the umami taste in Chinese soy sauce. 2015 Elsevier Ltd. All rights reserved
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