7 results about "Welan gum" patented technology

The invention provides a medium-low permeability oil reservoir rhamnolipid foam oil displacement system and a screening method and application, and relates to the technical field of microbial oil recovery, the medium-low permeability oil reservoir rhamnolipid foam oil displacement system comprises the following steps: S1, screening an applied oil reservoir; s2, determining a rhamnolipid foam flooding system based on the oil reservoir mineralization degree; s3, based on the porosity of the oil reservoir, the injection mode of a rhamnolipid foam oil displacement system is determined, the rhamnolipid foam oil displacement system comprises a foaming agent, a foam stabilizer, nitrogen and water, the foaming agent comprises one or more of dirhamnose difat, dirhamnose monofat, single rhamnose monofat and single rhamnose difat fermentation liquor, and the foam stabilizer comprises one or more of dirhamnose difat, dirhamnose monofat, single rhamnose monofat and single rhamnose difat fermentation liquor. The foam stabilizer is prepared from one or more of xanthan gum, welan gum, Wollan gum, Dide gum, gellan gum, rhamnose gum, diidine gum, plant cellulose and bacterial cellulose. The method has the beneficial effects that the oil reservoir application range is wide, the pertinence is high, the field test effect is good, efficient generation and long-acting migration of foam in the oil reservoir are guaranteed, green and high-quality development of old oil fields is promoted, and achievement of the national dual-carbon strategy is assisted.

The invention relates to the technical field of plant disease prevention and treatment, in particular to application of a Welan gum aqueous solution to prevention and treatment of plant diseases, and the concentration of the Welan gum aqueous solution is 50 micrograms per milliliter to 100 micrograms per milliliter. The molecular weight of the welan gum is 800 Da to 900 Da. Experiments prove that the Welan gum aqueous solution can inhibit spore germination and mycelial growth of the original fungus curvularia lunata of the corn curvularia leaf spot, the physiological function of leaves is not affected after spraying, in addition, the Welan gum aqueous solution also has an inhibiting effect on diseases such as northern corn leaf blight and wheat scab, and is expected to be used as a green and safe pesticide, and the Welan gum aqueous solution has broad application prospects. The compound is applied to comprehensive prevention and control of diseases of corn and other crops, and can also be used as a dispersing agent and a slow-release agent to be mixed with other bacteriostatic agents to improve the prevention and control effect.

The invention provides a foamable oral care composition which contains a foaming agent and a foam synergistic agent, and the foaming agent is one or a combination of more of soybean protein isolate, hydrolyzed wheat protein, potato protein, casein phosphopeptides (CPP), oat protein and vital gluten; the foam synergistic agent is one or a combination of more of carrageenan gum, abelmoschus manihot gum, fenugreek gum, guar gum, locust bean gum, karaya gum, cassia seed gum, caesalpinia spinosa gum, flaxseed gum, sodium alginate, tragacanth gum, welan gum, sa-hao seed gum, gleditsia sinensis lam carbohydrate gum, sanxian gum and sesbania gum. The foam amount of the toothpaste is increased, the foaming amount of the toothpaste using a chemical surfactant in the market can be achieved, and the habit of consumers on the foam demand of the toothpaste can be completely met.

The application belongs to the technical field of bioengineering, and particularly relates to a sphingan oligosaccharide and a preparation method and application thereof. The application provides a sphingan oligosaccharide, the main chain structure of which is beta-L-Rhap-(1→3)-beta-D-Glcp-(1→4)-beta-D-GlcpA, and the sphingan oligosaccharide is obtained by degrading sphingan (Welan gum, gellan gum and diutan gum) by sphingan degrading enzyme SpnR and then purified by liquid chromatography. The sphingan oligosaccharide prepared by the preparation method has mild reaction conditions and is simple to separate. The sphingan oligosaccharide prepared by the application has good plant growth promoting ability and intestinal probiotic effect, and can be used in the fields of agriculture, food, health products and the like, and the application of the sphingan and the sphingan oligosaccharide is expanded.

The invention relates to a tailing sand conditioning agent as well as a preparation method and application thereof, the tailing sand conditioning agent is prepared from the following raw materials: modified biomass charcoal-mineral composite powder, nano silicon dioxide, sodium oleate, sodium thiosulfate, sodium hydroxide, talcum powder, welan gum, a polyether type defoaming agent and deionized water, the preparation method of the modified biomass charcoal-mineral composite powder comprises the following steps: uniformly compounding and mixing pod shell powder, cocklebur fruit powder and montmorillonite powder according to a mass ratio to obtain a mixture, placing the mixture in an acidic activator solution, carrying out dipping treatment, carrying out heat treatment, washing to be neutral, and drying to obtain the modified biomass charcoal-mineral composite powder. The prepared tailing sand conditioning agent is applied to a concrete system containing tailing sand, the compressive strength, chloride ion permeation resistance and freeze-thaw resistance of concrete can be remarkably improved, and the durability is good.

The invention provides a biological foam oil displacement system for medium and low permeability oil reservoirs and a screening method and application, and relates to the technical field of microbial oil recovery, the method comprises the following steps: oil reservoir screening, biological foam oil displacement system construction, and injection mode selection; a foaming agent of the biological foam oil displacement system comprises one or more of fermentation broth such as double rhamnose monolipid, double rhamnose dilipid, single rhamnose monolipid, single rhamnose dilipid, surfactin, scabamarin, iturin, deysin, serratia marcescens, mucilatin, trehalose lipid, lactone type sophorolipid, acid type sophorolipid and the like, and a bio-based oil displacement agent, and the foaming agent is prepared from one or more of fermentation broth such as double rhamnose monolipid, double rhamnose dilipid, single rhamnose monolipid, single rhamnose dilipid, surfactin, scabamarin, iturin, deysin, serratia marcescens, mucilatin, trehalose lipid, lactone type sophorolipid and acid type sophorolipid. The foam stabilizer comprises one or more of xanthan gum, welan gum, Wollan gum, Dide gum, gellan gum, rhamnose gum, diidine gum, cellulose, biosynthetic nanoparticles and fly ash. The method has the beneficial effects that aiming at the problems of high heterogeneity and the like of medium and low permeability reservoirs, the characteristics of the biological surfactant are utilized, and a pure biological foam combination flooding system is constructed.