Content of selected secondary metabolites in wild hop
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Eva Ürgeová
,
Katarína Vulganová
Abstract
We focused on the determination of biologically active secondary metabolites in wild hops over the course of the vegetation period in four selected sites in Piešťany. Hop was collected in four collection periods in 2010. The objects of research were the leaves of male and female plants, and female cones. Analysis of the extracts from wild hop confirmed differences in total content of polyphenols, flavonoids between the localities and in the growing seasons over the vegetation period. The extracts from leaves from the first harvest in localities “gSládkovičova” and the river Vah showed higher levels of polyphenols (4.91–6.93 mg g−1 of dry mass), flavonoids (2.28–2.99 mg g−1 of dry mass) than the extracts from cones collected at the end of the vegetation period (polyphenols 3.63–5.33 mg g−1 of dry mass, flavonoids 1.86–2.16 mg g−1 of dry mass). The extracts from leaves from the first harvest from the “tennis court” site showed lower values of polyphenols and flavonoids. Our findings were that the leaves from the first harvest at the beginning of the growing season contained higher amounts of the secondary metabolites investigated than the cones at the end of the growing season. The content of α-bitter acids in wild hop cones ranged from 1.64 % to 2.91 %, in leaves from 0.11 % to 0.99%. Concentration of β-bitter acids in cones varied from 1.63 % to 1.93 % and in leaves from 0.02 % to 0.61 %.
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© 2012 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Content of selected secondary metabolites in wild hop
- Continuous sorption of synthetic dyes on dried biomass of microalga Chlorella pyrenoidosa
- Sludge of wastewater treatment plants as Co2+ ions sorbent
- Effect of animal age and gender on fatty acid and elemental composition in Austrian beef applicable for authentication purposes
- Nutritional, antioxidant, and glycaemic characteristics of new functional bread
- Effects of enzymes and hydrocolloids on physical, sensory, and shelf-life properties of wheat bread
- Magnetic chains formed from tetra-coordinate Co(II) complexes
- Prediction of anti-tuberculosis activity of 3-phenyl-2H-1,3-benzoxazine-2,4(3H)-dione derivatives
- Experimental investigation of bubble and drop formation at submerged orifices
- Cadmium concentration stabilization in a continuous sulfate reducing bioreactor via sulfide concentration control
- Facile synthesis of gemini surface-active ATRP initiator and its use in soap-free AGET ATRP mini-emulsion polymerisation
- Bulgarian natural diatomites: modification and characterization
- Synthesis, characterisation, and DC conductivity of polyaniline-lead oxide composites
