Calendula Flower
Calendula Flower
Can you explain to me what that means? '50% Ethanol (1:9, w / w) '?
I found documentation about: 'preparation calendula extract ', I do not understand the quantity used for ethanol and the interest of The calendula officinalis L. dried flowers were ground in a knife mill into fine particles (0.3 mm - diameter on average). Drug powder was macerated with 50% ethanol (1:9, w / w) at 25 ° C for 5 days. This mixture is subjected to mechanical agitation at 870 rpm (Fisatom, model 713 D) for 1 hour at the beginning and end of the maceration period. After that, the extract was filtered and dried at 40 ° C in a stove with air circulation. Finally, residue resuspended into a 50% hydroalcoholic solution (200 mL) and stored at -20 ° C. Obtained concentrated extract containing 15.7% dry weight. thank you!
I'm sure it meant to take the soles of ethanol 50% and use the interest to 9g 1g Ethanol W / W mean heavy / heavier ore so 100g/100g..ethanol in beer given V / W 100ml/100g
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