Rheological properties of araçá-boi poles submitted to range irradiation
DOI:
https://doi.org/10.5327/fst.540Palavras-chave:
non-thermal processing, bioactive compounds, vitamin c, long shelf lifeResumo
The aim of this work was to evaluate the biotite compounds and verify the rheological behavior of manioc pulp treated with different doses of gamma radiation. The rheological parameters obtained were shear stress, strain rate, and apparent viscosity, in triplicate, for the arapa (2, 3, 4 kGy) and non-irradiated samples (control), using a Digital Viscometer II + PRO, Regular Viscometer Torque digital Brookfield viscometer, at rotational speeds of 5, 10, 20, 40, 60, 80, 100, 120, 140, 150, 160, 180, and 200 rpm, and temperatures of 5, 15, 25, 35, 45, 55, and 65°C, measured with the aid of a thermostat, at ambient atmospheric pressure. It was verified that there was no significant loss in flavonoid values; however, a decrease occurred with the application of the treatments, when compared to the control treatment. This fact may be due to the breakdown of the instability of some active compounds when exposed to ultraviolet and visible light or other sources of ionizing radiation. It was verified that after the application of the doses, the microstructure presented differentiated ramifications when compared with the control treatment. The processing of food leads to the destruction and reconstitution of the microstructure, which can be viewed as a series of restructuring and reorganization operations. Although there was a slight reduction in the flavonoid content with the doses tested, the use of the irradiation treatment is still feasible for this product. The physicochemical properties and bioactive compound characteristics of the araçá-boi pulp were maintained. Additionally, the irradiation process did not affect the rheological behavior of the ox spider pulps.
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