22 research outputs found
Enantiomeric composition of α-pinene in essential oils of leaves and unripe cones of Juniperus communis L
No full textPreconditions for industrial use of foliage as felling by-product of Scots pine for essential oil production
No full textComparison of Quercetin derivatives in ethanolic extracts of red raspberry (Rubus idaeus L.) leaves
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Radical scavenging activity of raspberry (Rubus idaeus L.) fruit extracts
No full textThirty-one raspberry (Rubus idaeus L.) plants were collected in different natural habitats of Lithuania located in 17 districts and replanted in the experimental field. The fruits from different accessions were extracted with ethanol and the extracts were tested for their antioxidant activity (AA) by using ABTS·+ radical cation decolourisation and DPPH·radical scavenging methods. All tested raspberry fruit extracts were antioxidatively active; their radical scavenging capacity at the applied concentrations varied from 52.9 to 92.6% in DPPH·reaction system and from 52.5 to 97.8% in ABTS·+system. The total amount of phenolic compounds in fruits varied from 5.6 to 13.7 mg of gallic acid equivalents in 1 g of plant extract. However, strong correlation between the radical scavenging capacity and the total amount of phenolic compounds in the fruit extracts was not observed, which indicates remarkable differences in the composition and antioxidant power of phenolic compounds present in the fruits harvested from raspberry accessions collected from different natural habitats. Most likely, environmental conditions and genetic factors should play an important role for the accumulation of active compounds in raspberry fruits
Comparison of Quercetin derivatives in ethanolic extracts of red raspberry (Rubus idaeus L.) leaves
No full textEthanol extracts from 41 raspberry leaf accessions were studied. The plants of
Rubus idaeus
L. were collected in different natural habitats of Lithuania located in 26 districts and replanted in the experimental field of the Institute of Botany, Lithuania. The total amount of phenolic compounds in leaves varied from 0.3 to 2.2 mg of gallic acid equivalents (GAE) in 1 g of dry leaves. Quercetin glucuronide, quercetin-3-glucoside and quercetin glucosylrhamnoside (rutin) were identified in the extracts by HPLC/UV/MS. Remarkable differences in the composition of the extracts were observed indicating that herbal tea preparations containing
Rubus idaeus
leaves, which are used for phytotherapeutic purposes need more detailed examination in order to standardise their possible functional properties and pharmacological effects
Developing a national crop wild relative iin situ/i conservation strategy for Lithuania: creation of a national CWR inventory and its prioritization.
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