4 results about "Dextran" patented technology

The invention discloses an antibacterial whitening mouthwash and a preparation method thereof. The antibacterial whitening mouthwash comprises an antibacterial component and a mouthwash matrix component, wherein the antibacterial component comprises 0.05 to 0.5 part of lysozyme, 0.01 to 0.5 part of lauryl arginine ethyl ester hydrochloride, 0.01 to 1 part of dextran anhydrase and 1 to 10 parts ofabelmoschus manihot extract. A substrate component of the mouthwash comprises one or more of an emulsifier, a moisturize, a flavoring, an acid-base conditioner and an essence, and the balance is deionized water. Lysozyme and lauryl arginine ethyl ester hydrochloride are dissolved in a citric acid solution and uniformly stirred; the prepared ingredients are mixed with the emulsifier, moisturizer, flavoring and essence evenly, pH is adjusted, and abelmoschus manihot extract and dextran enzyme are added. The invention makes the synergistic effect between the natural antibacterial agent and the chemical antibacterial agent exist, and the mouthwash produced by the invention has high safety and good antibacterial activity, and can effectively prevent and control the occurrence of dental plaque and oral inflammation.

The invention discloses a novel serum-free cell cryopreservation liquid formula which comprises the following components: human serum albumin as a main body, 10% of DMSO (dimethylsulfoxide), 13.3% of compound electrolyte injection and 16.70% of dextran. By optimizing the formula of the cryopreservation liquid, the survival rate of the cells is remarkably improved, the pollution source is reduced, the novel serum-free cell cryopreservation liquid is provided, the serum-free cell cryopreservation liquid is easy to prepare and store, the viability of the recovered cells is extremely high, and potential risks existing in serum are avoided.

The invention discloses a method for preparing a hemostatic material based on an air jet pulverization technology. The method comprises the following steps of (1) preparing a fibrinogen solution, wherein the fibrinogen solution comprises the following components of 2.5-3.5 wt% of fibrinogen, 10-25 wt% of trehalose, 2-10 wt% of glycine, 1.0-1.5 wt% of sodium chloride, 0.1-0.6 wt% of sodium citrate, 2.0-2.5 wt% of arginine hydrochloride and the balance of water for injection; (2) performing freeze drying on the fibrinogen solution, and performing air jet pulverization to obtain fibrinogen powder; (3) preparing a thrombin solution, wherein the thrombin solution is prepared from the following components of 0.1 to 0.5 weight percent of thrombin, 1.5 to 5.0 weight percent of trehalose, 0.3 to 1.0 weight percent of calcium chloride, 0.5 to 2.0 weight percent of glycine, 1.0 to 3.0 weight percent of cane sugar, 0.5 to 2.0 weight percent of dextran 20 and the balance of water for injection; (4) performing freeze drying on the thrombin solution, and performing air jet pulverization to obtain thrombin powder; and (5) mixing the fibrinogen powder with the thrombin powder, filling and drying to obtain the hemostatic material. The preparation process is simple, the period is short, and the prepared material is convenient to clinically use and excellent in hemostatic effect and has a wider application prospect.