美洲人参取Ginsenosides

American Ginseng ExtractProduct Specification : 5%, 10%, 20%, 30% Product Name: American Ginseng Extract Latin Name: Panax quinguefolium Appearance: brown yellow powder Part of the Plant Used:Root or Leaf Extract Method: Grain Alcohol/Water Description:It is completely natural North American ginseng extract (NAGE) containing known principle ginsenosides for Panax quinquefolius was assayed for metal chelation, affinity to scavenge DPPH-stable free radical, and peroxyl (LOO*) and hydroxyl (*OH) free radicals for the purpose of characterizing mechanisms of antioxidant activity. Dissociation constants (Kd) for NAGE to bind transition metals were in the order of Fe2+ > Cu2+ > Fe3+ and corresponded to the affinity to inhibit metal induced lipid peroxidation. In a metal-free linoleic acid emulsion, NAGE exhibited a significant (p < or = 0.05) concentration (0.01-10 mg/mL) dependent mitigation of lipid oxidation as assessed by the ammonium thiocyanate method. Similar results were obtained when NAGE was incubated in a methyl linoleate emulsion containing haemoglobin catalyst and assessed by an oxygen electrode. NAGE also showed strong DPPH radical scavenging activity up to a concentration of 1.6 mg/mL (r2 = 0.996). Similar results were obtained for scavenging of both site-specific and non site-specific *OH, using the deoxyribose assay method. Moreover, NAGE effectively inhibited the non site-specific DNA strand breakage caused by Fenton agents, and suppressed the Fenton induced oxidation of a 66 Kd soluble protein obtained from mouse brain over a concentration range of 2-40 mg/mL. These results indicate that NAGE exhibits effective antioxidant activity in both lipid and aqueous mediums by both chelation of metal ions and scavenging of free radicals. If you have any further questions or need a sample ,please do not hesitate to contact with me.Wish you all of the best and regards! Sincerely yours, Packing Detail: Packed in paper-drums and two plastic-bags inside. Net weight: 25kgs/drum. Storage situation: Stored in a cool and dry well-closed container, keep away from moisture and strong light/heat. Shelf life: Two years under well storage situation and stord away from direct sun light.