Method for degrading kelp polysaccharide sulfate
The technology of kelp sulfate polysaccharide and kelp is applied in the field of marine biology, can solve the problems of acid polysaccharide sulfate group shedding, high requirements on equipment and equipment, and cannot be applied to industrial production, etc., and achieves fast degradation speed, less reagent consumption and low cost. Effect
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Embodiment 1
[0026] (1) Separation and purification of laminar sulfate polysaccharide
[0027] Take kelp and soak it in water for 2 hours, and the swollen kelp is crushed into kelp pulp. Extract by heating at 95°C for 6h, cool to room temperature and filter. Add calcium chloride to the filtrate, and centrifuge to remove calcium alginate. A 3% (mass fraction) CTAB (cetyltrimethylammonium bromide) solution was added to the supernatant to combine with LPS for precipitation, and the added mass of CTAB was 40% of the polysaccharide mass. Centrifuge at 3000r / min for 10min to collect the CTAB-LPS precipitate. Calcium chloride is added for salt solution to free LPS, then ethanol is added to precipitate LPS, and pure LPS is obtained by centrifugation and drying. Its average molecular weight is 172,000, mainly block copolymers composed of α-1,4-L guluronic acid and β-1,4-D-mannuronic acid as monomers, α-L-fucus Polymers of sugar-4-sulfate and polymers of β-D-glucopyranose, the content of sulfate...
Embodiment 2
[0031] (1) Separation and purification of laminar sulfate polysaccharide
[0032] Take kelp and soak it in water for 2 hours, and the swollen kelp is crushed into kelp pulp. Heat and extract at 100°C for 2h, cool to room temperature and filter. Add calcium chloride to the filtrate, and centrifuge to remove calcium alginate. A 4% (mass fraction) CTAB (cetyltrimethylammonium bromide) solution was added to the supernatant to combine with LPS for precipitation, and the added mass of CTAB was 110% of the polysaccharide mass. Centrifuge at 3000r / min for 10min to collect the CTAB-LPS precipitate. Calcium chloride is added for salt solution to free LPS, then ethanol is added to precipitate LPS, and pure LPS is obtained by centrifugation and drying. Its average molecular weight is 253,000, mainly block copolymers composed of α-1,4-L guluronic acid and β-1,4-D-mannuronic acid as monomers, α-L-fucus Polymers of sugar-4-sulfate and polymers of β-D-glucopyranose, the content of sulfate...
Embodiment 3
[0036] (1) Separation and purification of laminar sulfate polysaccharide
[0037] Take kelp and soak it in water for 2 hours, and the swollen kelp is crushed into kelp pulp. Extract by heating at 100°C for 4h, cool to room temperature and filter. Add calcium chloride to the filtrate, and centrifuge to remove calcium alginate. A 5% (mass fraction) CTAB (cetyltrimethylammonium bromide) solution was added to the supernatant to combine with LPS for precipitation, and the amount of CTAB added was 150% of the mass of the polysaccharide. Centrifuge at 3000r / min for 10min to collect the CTAB-LPS precipitate. Calcium chloride is added for salt solution to free LPS, then ethanol is added to precipitate LPS, and pure LPS is obtained by centrifugation and drying. Its average molecular weight is 1.5 million, mainly block copolymers composed of α-1,4-L guluronic acid and β-1,4-D-mannuronic acid as monomers, α-L-fucus Polymers of sugar-4-sulfate and polymers of β-D-glucopyranose, the con...
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