A. Dobreva* Institute of Roses, Essential and Medical Plants, 49 Osvobojdenie, 6100 Kazanlak, Bulgaria Abstract. The aim of the investigations was to trace the influence of the speed level on the distillation of white oil-bearing rose. Using the methods of direct distillation of fresh

A. Dobreva* Institute for Roses and Medicinal Plants, 49 Osvobojdenie, 6100 Kazanlak, Bulgaria Abstract. Applying the method of distillation, the influence of different temperatures at the outlet of the cooler when processing Rosa alba is traced. It has been found that the extraction

A. Dobreva, M. Gerdzhikova Abstract. In 2010 the content and composition of the essential oil from Rosa alba L. in the different phases of the development of blossom is examined. Quantitative and qualitative changes of the essential oil are traced. Flowers from the population of white

The dynamics of the essential oils of Rosa damascena Mill. and Rosa alba L. within a day period has been measured. It has been found that the two genotypes have the same rhythm in the release of volatile emissions. In the context of meteorological conditions the maximum of oil of the