The scientists used different techniques, such as differential scanning calorimetry (DSC), confocal laser scanning microscopy and magnetic resonance imaging (MRI), to measure starch
retrogradation, microstructure and the water distribution of the samples containing effective anti-hardening additives in order to reveal potential mechanisms of action.
The overall sedimentary succession shows a facies change from the mixed tidal flat to the ramp carbonate deposits in response to
retrogradation during second-order transgressive process.
In addition, the tendency to starch
retrogradation by BPSF was lower (1.761 [+ or -] 0.510Pa.s) when compared to that by rice flour (4.747 [+ or -] 0.157Pa.s).
In general, the starches with the highest
retrogradation, which in this study were those that did not undergo the extrusion process as seen in Table 4, setback viscosity, produced more pastes that are opaque.
The acetylation, cross-linking, and pregelatinization steps increased the cold viscosity, water absorption index, and gel hardness and reduced the gel cohesiveness, paste clarity, and
retrogradation of the starches produced.
Kaur, "Morphological, thermal, rheological and
retrogradation properties of potato starch fractions varying in granule size," Journal of the Science of Food and Agriculture, vol.
Most of the sources identify the
retrogradation (increasing crystallinity caused by cross linkages of starch molecules) of amylopectin as the main reason for staling [1,37,48,82,85-88].
When the amount of grafted polymer increased (43% PCL), strong signals were observed, which likely indicates a
retrogradation of the material and an overlapping between the peaks from the grafted polymer and the plasticizer.
During the period that spread between 60-90 days, we observe phenomenon of
retrogradation which that means reductions and decreases of quantities of [P.sub.2][O.sub.5] of 0,9, 1,29, 1,73, 0,92, 1,17, 1,59, 1,84, 0,98, 4,48, 2,31, 1,86 and 2,24 ppm for treatments S1, S1H1, S1H1P, S1H2, S1H2P, S1P, S2, S2H1, S2H1P, S2H2, S2H2P and S2P.
It is well known fact that the addition of hydrocolloids increases the viscosity of starch dispersion and influences the
retrogradation rate.
The rate of
retrogradation, which is a ratio of the microbial population on KAA confirmative agar to that on beef-extract agar, varies depending on preceding crops.
