(2S,3S)-(-)-Glucodistylin
Highest concentrations of (2R,3R)-(+)-glucodistylin, (2S,3S)-(-)-glucodistylin and 3-O-( -d-xylopyranosyl)taxifolin occur in European beeches can strongly infest with beech scale.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
Anticancer Res.2024, 44(3):1033-1044.
Food Chem X.2024, 21:101208.
Journal of Holistic Integrative Pharmacy2024, 5(1):45-55.
Nutrients.2020, 12(5):1242.
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Int J Mol Sci.2021, 22(17):9400.
Korean Journal of Pharmacognosy2019, 50(4):285-290
Applied Biological Chemistry2022, 65(12)
Korean Journal of Pharmacognosy2017, 48(4):320-328
J Food Biochem.2019, 43(9):e12970
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Phytochemistry, 1997, 45(1):51-7.
Phenols from Fagus sylvatica and their role in defence against Cryptococcus fagisuga.[Reference:
WebLink]
METHODS AND RESULTS:
In extracts of inner and outer bark of Fagus sylvatica, qualitative dependence of the phenolic composition on infection with Cryptococcus fagisuga feeding in the parenchyma tissue was observed. The seven major compounds were isolated and completely assigned, mainly by two-dimensional NMR techniques. Highest concentrations of (2R,3R)-(+)-glucodistylin, (2S,3S)-(-)-Glucodistylin and 3-O-( -d-xylopyranosyl)taxifolin occur in European beeches strongly infested with beech scale.
CONCLUSIONS:
The concentration of cis-coniferin was lowered after attack, while the concentrations of catechin, cis-isoconiferin and cis-syringin remained unaffected. The changes are discussed as a defence reaction.
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