Frog skin extract and its extraction method
An extraction method and extract technology are applied in the field of frog skin extract and its extraction, which can solve the problems of low content of frog collagen and low yield, and achieve the effects of lightening pigmentation, brightening skin tone and reducing wrinkles.
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Embodiment 1
[0026] The preparation of embodiment 1 frog skin extract
[0027] Take 100g of dried wood frog skin, soak it in 0.5% sodium hydroxide alkali solution, soak until softened, freeze-dry at -75°C for 6 hours, crush it into 40 mesh coarse powder, add 8 times the amount of water, stir and heat to 60°C , keep warm for 1 hour, cool to 37°C, add acetic acid to acidify, adjust the pH value to 3, stir evenly, keep warm at 37°C for 15 hours, adjust the pH value to 3, add 0.5g pepsin (enzyme activity is 100,000 IU / g) Mix with 1.0 g of cellulase (enzyme activity is 1.4 million IU / g), stir evenly, carry out biological enzymolysis for 12 hours, heat to 60°C to inactivate the enzyme, centrifuge at 3000 rpm at high speed, take the supernatant, and use 10% sodium carbonate solution to adjust the pH value to 6-7, add saturated ammonium sulfate solution for salting out until no precipitate precipitates, filter and collect the precipitate, add purified water to the precipitate to dissolve it, put i...
Embodiment 2
[0032] The preparation of embodiment 2 frog skin extract
[0033]Take 100g of dried wood frog skin, soak it in 0.5% sodium hydroxide alkali solution, soak until softened, dry at -78°C for 4 hours, grind it into 20 mesh coarse powder, add 10 times the amount of water, stir and heat to 58°C, Keep warm for 1 hour, cool to 38°C, add hydrochloric acid to acidify, adjust the pH value to 2, stir evenly, keep warm at 38°C for 12 hours, adjust the pH value to 2, add 1.0g pepsin (enzyme activity is 100,000 IU / g) and 1.2g of cellulase (enzyme activity is 1.4 million IU / g), stir evenly, carry out biological enzymolysis for 15 hours, heat to 60°C to inactivate the enzyme, centrifuge at 3000 rpm at high speed, take the supernatant, and use 10 % sodium hydroxide solution to adjust the PH value to neutral, add saturated ammonium sulfate solution to carry out salting out until no precipitate separates out, filter and collect the precipitate, add purified water to the precipitate to dissolve it...
Embodiment 3
[0038] The preparation of embodiment 3 frog skin extract
[0039] Take 100 g of dried wood frog skin, soak it in 0.5% sodium hydroxide alkali solution, soak until softened, dry at -76°C for 5 hours, crush it into 30 mesh coarse powder, add 9 times the amount of water, stir and heat to 55°C, Keep warm for 1 hour, cool to 37.5°C, add acetic acid to acidify, adjust the pH value to 2, stir evenly, keep warm at 37.5°C for 14 hours, adjust the pH value to 2, add 0.8g pepsin (enzyme activity is 100,000 IU / g) and 1.5 g of cellulase (enzyme activity is 1.4 million IU / g), stirred evenly, carried out biological enzymolysis for 14 hours, heated to 60°C to inactivate the enzyme, centrifuged at 3000 rpm at high speed, took the supernatant, and used 10 % sodium carbonate solution to adjust the PH value to neutral, add saturated ammonium sulfate solution and carry out salting out until no precipitate separates out, filter and collect the precipitate, add purified water to the precipitate to d...
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