Přidal Antonín, Trávníček Petr, Kudělka Jan, Nedomová Šárka, Ondrušíková Sylvie, Trost Daniel, Kumbár Vojtěch
Department of Zoology, Fisheries, Hydrobiology and Apidology, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic.
Department of Agricultural, Food and Environmental Engineering, Faculty of AgriSciences, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic.
Materials (Basel). 2021 May 11;14(10):2472. doi: 10.3390/ma14102472.
Heather honey is a valuable and rheologically special type of honey. Its above-average selling price may motivate its intentional violation with a mixture of honey from another botanical origin, the price of which is lower on the market. This work deals with the rheological properties of such devalued heather honey in order to determine the changes in the individual rheological parameters depending on the degree of dilution of the heather honey. For this purpose, a differently diluted heather honey sample series was created and the following rheological parameters were determined: hysteresis area, -value, yield stress (), parameter B (Weltman model), parameter , or parameter C (model describing the logarithmic dependence of the complex viscosity on the angular frequency). Part of the work was research into whether the set parameters can be used as comparative parameters. It was found that the hysteresis area does not appear to be a suitable relative comparison parameter due to the high variability. The parameters that appear to be suitable are the relative parameters -value and the parameter , which showed the greatest stability. The change in the determined rheological parameters is, depending on the degree of dilution, non-linear with a step change between the samples containing 40% (/) and 60% (/) of a heather honey.
石南蜂蜜是一种珍贵且流变学特性特殊的蜂蜜。其高于平均水平的售价可能促使其被故意与其他植物来源的蜂蜜混合而贬值，后者在市场上价格较低。这项工作研究了这种贬值的石南蜂蜜的流变学特性，以确定各个流变参数随石南蜂蜜稀释程度的变化。为此，创建了一系列不同稀释度的石南蜂蜜样品，并测定了以下流变参数：滞后面积、δ值、屈服应力（τ）、参数B（韦尔特曼模型）、参数α或参数C（描述复数粘度对数与角频率关系的模型）。工作的一部分是研究设定的参数是否可作为比较参数。结果发现，由于高变异性，滞后面积似乎不是一个合适的相对比较参数。似乎合适的参数是相对参数δ值和参数α，它们表现出最大的稳定性。所测定的流变参数的变化，取决于稀释程度，是非线性的，在含有40%（体积/体积）和60%（体积/体积）石南蜂蜜的样品之间有阶跃变化。
