Use of dihydrochalcone glucoside as active ingredient for whitening and improving dull skin quality
A technology of dihydrochalcone glycosides and active ingredients, which is applied in the field of dihydrochalcone glycosides as active ingredients for whitening and improving dull skin quality, and can solve the problem of single ingredients
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Embodiment 1
[0037] Tyrosinase Inhibition Test
[0038] 1. Determination of tyrosinase activity
[0039] 15 μL 5% DMSO solution, 60 μL 0.25 mmol / L L-Dopa, 195 μL pH 6.8 phosphate buffer solution, shake well. After incubating at 37°C for 5 minutes, add 30 μL of tyrosinase solution and mix immediately. Measure the absorbance value at 475nm with a multi-functional microplate reader at a constant temperature of 37°C, make three parallel samples for each sample, and use the system without enzyme as a blank to draw a straight line of absorbance growth with time, and calculate it from the slope of the line Enzyme activity A 0 .
[0040] 2. Determination of tyrosinase enzyme activity under the action of samples
[0041] 15 μL samples of different concentrations (5% DMSO), 60 μL 0.25 mmol / L L-Dopa, 195 μL pH 6.8 phosphate buffer solution, shake well. After incubating at 37°C for 5 minutes, add 30 μL of tyrosinase solution and mix immediately. Measure the absorbance value at 475nm with a multi...
Embodiment 2
[0051] Inhibition of melanin production in B16 melanoma cells
[0052] Using NaOH cracking method. The day before the detection, the cells were subcultured to make their confluence 30%-50%, and DMEM-high glucose medium was used for detection. For example, a 6-well plate is used, the diameter of each well is 34.8mm, and the growth area is 9.5cm 2 . The amount of medium used is 2000 μL. Add samples for processing the next day, when the confluence reaches 80%-90%, the cell volume is 1×10 6 / hole. When the eyes see obvious color changes in the medium, and the microscope observes black precipitates in the cells. After about 48 hours, the cells were collected for detection. Harvest 1×10 6 Wash the cells twice with PBS, add 200 μL redistilled water to suspend the precipitate, add 1 mL ethanol:ether (1:1) mixture, let stand at room temperature for 20 min, centrifuge at 3000 r / min for 5 min, add 1 mol / L NaOH l to the precipitate mL (containing 10% DMSO), incubated in a water ba...
Embodiment 4
[0058] Preparation of gel-like peel-off mask
[0059] In 65g of pure water, add 5g of carboxymethylcellulose and 10g of polyvinyl alcohol, dissolve while heating, add 0.1g of hesperidin dihydrochalcone and 19g of ethanol at the same time, add a small amount of citrus essence, Makes into a gel-like peel-off mask.
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