Use of extract of bark of silver fir (Abies alba Mill.) for preparing of beekeeping productsud

摘要

The purpose of our thesis was to gain new honey analogous beekeeping product byud feeding the bees with fir bark extracts (Abies alba Mill.) and to assess the ud suitability of the product as honey in addition to daily human consumption. In this ud regard, we first had to determine the appropriate concentration of the extract, by ud testing which concentrations would the bees prefere. After finding out an appropriateud concentration, we prepared large quantities of solutions and fed the bee colonies per ud supply. The first colony was fed with dry extract and the other with liquid extract, theud third colony only with sugar solution and all three solutions were supplemented with ud beetroot juice. The gained product and food were used for further testing with ud spectrophotometer, where we found that the quantity of beetroot juice and of the ud extract were less in the product. Similar, trend was demonstrated using the ud Folin-Ciocalteu's method. We have also carried out sensory analysis of four kinds ofud honey, including our product. We demostrated that the bark fir extract was present inud the product, however we would have to devote some attentions to oxidation of ud beetroot pigments besides the technolohy of feeding.udud