Daphnin
Daphnin can contribute to the allergic potential of chamomile.
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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.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
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.
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Phytomedicine. 2001 Jul;8(4):302-5.
Antimicrobial evaluation of coumarins and flavonoids from the stems of Daphne gnidium L.[Pubmed:
11515721]
The antimicrobial activity of stems methanol extract from Daphne gnidium L. collected from Sardinia (Italy) was evaluated against 6 strains of standard and clinical isolated gram (+/-) bacteria.
METHODS AND RESULTS:
The antimicrobial effect on two strains of fungi was also tested. The extract in toto exhibited antibacterial activity against Bacillus lentus and Escherichia coli, but was inactive against fungi. Four coumarins (daphnetin, Daphnin, acetylumbelliferone, daphnoretin) and seven flavonoids (luteolin, orientin, isoorientin, apigenin-7-O-glucoside, genkwanin, 5-O-beta-D-primeverosyl genkwanine, 2,5,7,4'-tetrahydroxyisoflavanol) present in the plant extract were also investigated against the same strains of bacteria and fungi assayed for the crude extract.
CONCLUSIONS:
The most active compounds were daphnetin, genkwanin, and 2,5,7,4'-tetrahydroxyisoflavanol.
Food Chem. 2013 Nov 1;141(1):54-9.
Coumarins of Matricaria chamomilla L.: aglycones and glycosides.[Pubmed:
23768326 ]
The identity and quantity of coumarin-like compounds in leaves and anthodia of Matricaria chamomilla L. were studied by LC-DAD and NMR. So far, two monosubstituted coumarins, herniarin and umbelliferone, and two herniarin precursors were identified therein.
METHODS AND RESULTS:
In this paper, two other coumarin glycosides and one aglycone were confirmed. Skimmin (umbelliferone-7-O-β-d-glucoside), Daphnin (daphnetin-7-O-β-d-glucoside) and daphnetin (7,8-dihydroxycoumarin) were found for the first time in diploid and tetraploid leaves and anthodia of M. chamomilla L.
CONCLUSIONS:
Daphnetin is known as a strong sensitizer, so this compound and its glycosidic derivative can contribute to the allergic potential of chamomile. Commercial chamomile preparations were tested for their presence.
