A comparative study of texture and rheology of Argentinian honeys from two regions

YAMUL, DIEGO K.; NAVARRO, ALBA S.; MALDONADO, EZEQUIEL

JOURNAL OF TEXTURE STUDIES

WILEY-BLACKWELL PUBLISHING, INC

Año: 2018 vol. 49 p. 424 - 433

0022-4901

The rheological and textural properties of 26 eastern Argentinian honeys from two different regions (North and Central) were investigated. The viscosity curves of the samples were obtained using a rotational rheometer over a temperature range of 10 to 50C. The viscosity decreased with temperature and all honeys showed a Newtonian behavior. The temperature dependence of viscosity was described using the Arrhenius, Williams?Landel?Ferry, Vogel?Taumman?Fulcher, and Power Law models. The glass transition temperatures of honeys weremeasured with differential scanning calorimetry and values ranged from −42.63 to −47.71C.The glass transition temperature was also predicted with the Williams?Landel?Ferry model and no significant differences were observed with the experimental results. Rheological parameterswere obtained by small amplitude oscillation experiments. Results indicated that the viscous modulus was higher than the storage modulus within all the frequency ranges assayed and honeys from the North region were more viscous. Results of the back extrusion test showedthat honeys from the Central region are harder and both groups of honeys (North and Centraexhibited the same consistency and adhesivity.