Rose oil the aromatics unaltered by heat. Because CO is gas at normal atmospheric pressure, it leaves no trace of itself in the final product. The equipment for CO extraction is expensive, which is reflected in the price of the essential oils obtained from the process. It takes a large amount of rose petals to distill a small amount of essential oil. Depending on extraction method and plant species, the typical yield can be approximately 1:3,000. To mitigate the cost, some dishonest dealers will dilute rose oil with geranium ("Pelargonium graveolens") or palmarosa ("Cymbopogon martinii") essential oils, both of which are rich
Tagetes erecta 2 November. The word ' (also spelled ') comes from the Nahuatl term for the flower ', literally translated as "twenty flower". In Thai language it is called ดาวเรือง [DaoRuang], literally translated as "star glittering". Water infused with the fragrant essential oil of the flower was used to wash corpses in Honduras, and the flower is still commonly planted in cemeteries. Since prehispanic times, this plant has been used for medicinal purposes. The Cherokee used it as a skin wash and for yellow dye. The pigments of the erect tagetes are due to the presence of carotenoids, of which the