Published in Scientific Papers. Series B, Horticulture, Vol. LXVIV, Issue 1
Written by Iuliana CREȚESCU, Giancarla VELICEVICI, Mihaela MĂLĂESCU, Oana MUNTEANU, Raluca HORHAT
The study sought to evaluate the dynamic viscosity of Chardonnay and Sauvignon Blanc dry and semi dry wines and to correlate it with other physical parameters. The samples originated from vineyards situated in different geographical regions of Romania (Banat, Transylvania, Oltenia, Muntenia, Moldavia and Dobrudja). A supplementary sample was introduced, a blending variety originating from the Cotesti vineyard (Moldavia region). Based on previous studies in the literature, the wine samples were considered to possess Newtonian fluid characteristics. Therefore, the wines’ dynamic viscosity was computed using a mathematical formula, using an indirect method. The dynamic viscosity of the dry Chardonnay wine at 20ºC ranged between 1.5446 mPa·s (ISSA-Transylvania Hills) and 1.6602 mPa·s (Tarnave Jidvei region - Transylvania), while the one of the semidry Chardonnay variated from 1.6756 mPa·s (Tarnave Jidvei region - Transylvania) to 1.5344 mPa·s (Ovidiu-Dobrudja). The blending variety’s dynamic viscosity had a mean value of 1.5627 mPa·s. The pH of the samples from the two varieties ranged between 2.97 (Dobrudja) and 3.46 (Banat), while for the blending variety we obtained the lowest value, with the exception of the dry Chardonnay originating in Dobrudja.
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