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Recovering of Viticulture Wastes Into Value-added Products.
Topiař, Martin ; Zachová, Zdeňka
Viticulture has a very rich tradition in the Czech Republic, especially in South Moravia. During the production of wine, as in any other industry, different types of wastes are produced. These are, for example, the remains of must-pressing, the so-called grape marc, which is usually used on the compost or the wood mass produced by the pruning of the vineyards, called grape cane, which are pressed into wooden briquettes. Within our project, we are dealing with the possibilities of combining extraction techniques for the treatment of grape marc and grape cane in order to obtain extracts rich in biologically active substances (resveratrol, viniferine).
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22018101612010 - PDF
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Supercritical Fluid Extraction: A Green Method for the Isolation of Valuable Substances from the Various Biological Matrices.
Topiař, Martin ; Sajfrtová, Marie ; Šolcová, Olga ; Hradecký, J. ; Hůrková, K. ; Hajšlová, J.
Supercritical fluid extraction (SFE) using carbon dioxide is a sophisticated technology suitable for isolation of un-polar, high value biological active substances from the various biological matrices. In this study, it was used for the extraction of Magnolia x pruhoniciana flowers and Japonochytrium marinum fungus. Results obtained from the SFE were compared with those from conventional extraction methods. A total number of 37 compounds were identified in the magnolia isolate, from which α-pinene (18 % of peak area), cymene (14 % of peak area), β-pinene (13 % of peak area) and humulene (6 % of peak area) were its main components. Yield of valuable free fatty acids DHA and EPA obtained by the SFE of Japonochytrium marinum was more than 1.5 times higher in comparison with organic liquid extraction using mixture of methanol and dichloromethane.
Fulltext: content.csg - PDF
Plný tet: SKMBT_22317120815262 - PDF
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Supercritical Fluid Extraction of Eucalyptus Volatile Oil in View of Thermodynamic Modelling.
Sovová, Helena ; Stateva, R.P. ; Topiař, Martin
The aim of this contribution is to determine this relationship in the case of eucalyptus oil. The oil from the leaves of Eucalyptus grandis L., which was selected for experiments, is rich in a monoterpene alfa-pinene, a monoterpene oxide 1,8-cineole, a sesquiterpene aromadendrene, and a sesquiterpene alcohol globulol. The composition of saturated vapour phase in volatile oil+CO2 system was measured by sampling the extract from either milled dry leaves or essential oil on inert carrier, using a sufficiently large solvent residence time. Gas chromatography was used to analyse the composition of the samples, leaves, and essential oil. The extraction pressure and temperature were varied in the region of scCO2 with relatively low density, where the solvent selectivity is more pronounced. The experimental results were used to determine the temperature dependence of the parameters of thermodynamic model for the studied system.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22016090211381 - PDF
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