| Full text | |
| Author(s): |
Total Authors: 3
|
| Affiliation: | [1] Sao Paulo State Univ Unesp, Dept Food Engn & Technol, Inst Biosci Humanities & Sao Jose do Rio Preto Ex, Rua Cristovao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | FOOD HYDROCOLLOIDS; v. 92, p. 60-68, JUL 2019. |
| Web of Science Citations: | 2 |
| Abstract | |
The rheological behavior of gels prepared from albumin (ALB) and a mixture of ALB and low methoxyl amidated pectin (PEC) with different proportions were studied using oscillatory rheological tests, Fourier transform infrared spectroscopy (FT-IR spectroscopy), zeta potential measurements and confocal microscopy. The mixture was always 5% of the total solute. Assays were performed in two series, one in which all mixtures were adjusted to pH = 8 and another one without pH adjustment. The zeta potential values indicated the presence of a negative net charge on ALB-PEC gels. The rheological tests indicated a frequency dependence of the storage (G') and loss (G `') moduli, with G' > G `'. The presence of 1% and 2% of pectin in the mixture caused an increase in G'. However, a PEC concentration above 2% led to a decrease in G', regardless of the pH or frequency. FT-IR spectroscopy indicated that as the PEC content increased, a higher proportion of beta-sheet structures was found. Confocal microscopy also confirmed aggregation of ALB particles due to the PEC concentration. (AU) | |
| FAPESP's process: | 17/02808-6 - Minimal processes applied to fruits and vegetables: quality enhancement and energy savings |
| Grantee: | Maria Aparecida Mauro |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 12/24259-0 - Peptide and chitosan conjugates with pharmacological potential: synthesis, prospecting of activity in membrane mimetic systems, and evaluation in cells |
| Grantee: | Marcia Perez dos Santos Cabrera |
| Support Opportunities: | Research Grants - Young Investigators Grants |