Moisturizing cream
A technology for moisturizing cream and skin cream, which is applied in the directions of skin care preparations, cosmetics, cosmetic preparations, etc., can solve the problem of not finding patents or documents, and achieves good compatibility, simple production process, and inhibition of tyrosine. The effect of enzymatic activity
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[0042] Example 1 Plant composition in moisturizing moisturizing cream (homemade); 95% ethanol (Sinopharm Chemical Reagent Co., Ltd.); DPPH (Tokyo Kasei Co., Ltd., Japan, analytical pure); AB204-E electronic analytical balance (METTLE TOLEDO); UV-1600 ultraviolet spectrophotometer (METTLE TOLEDO).
[0043] DPPH appears dark purple in absolute ethanol and ethanol-water systems, with maximum absorption at 517nm and 525nm, respectively. The free radical scavenger can make the purple gradually fade. The content of DPPH and the scavenging ability of the reactive free radical scavenger on DPPH are determined according to the change of absorbance.
[0044] Accurately weigh 3.00mg of DPPH, dissolve it with 95% ethanol and dilute to 100ml. The solubility of DPPH is 20mg / L. Take 4ml of DPPH standard solution and place it in a test tube. Add 1ml of plant composition extract and leave it for 30 minutes. Measure the absorbance A at 517nm. Determine the DPPH clearance rate according to the foll...
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