A composition in powder form comprising alginic acid or sodium alginate, -pectin and chitosan, wherein the % by weight of the polysaccharides is at least 20% with respect to the total weight of the powder, the process for preparing the powder and its use in the treatment of cutaneous wounds and in the sector of food preservation are described.

The present disclosure provides a method of purifying polysaccharides from a cell lysate, comprising partially purifying the cell lysate comprising an impurity and a polysaccharide to obtain a clarified cmde lysate; mixing the clarified crude lysate with a neutralization solution comprising a salt to form a neutralized lysate; mixing the neutralized lysate with a precipitation solution comprising cetyltrimethylammonium bromide to form a first supernatant and a first precipitate; and separating the first precipitate from the first supernatant, wherein the polysaccharide is located in the first supernatant. The present disclosure further provides a method of making a polysaccharide vaccine. Also provided are vaccines, delivery systems, compositions and polysaccharides made by the methods described herein.

The present invention relates to a process for producing a low endotoxin alkali chitosan, chitin, chitosan derivative or chitin derivative, and also to a process for producing low endotoxin neutral chitosan, chitosan salt and chitosan derivatives, and to the products of such processes. The process comprises contacting chitosan, chitin, chitosan derivative or chitin derivative with an alkali solution having a concentration of less than 0.25M to form a mixture; leaving the mixture for a period of less than 12 hours and optionally drying the mixture. The low endotoxin alkali chitosan may be used in the manufacture of other useful chitosan based products.

The present invention relates to a process for producing a low endotoxin alkali chitosan, chitin, chitosan derivative or chitin derivative, and also to a process for producing low endotoxin neutral chitosan, chitosan salt and chitosan derivatives, and to the products of such processes. The process comprises contacting chitosan, chitin, chitosan derivative or chitin derivative with an alkali solution having a concentration of less than 0.25M to form a mixture; leaving the mixture for a period of less than 12 hours and optionally drying the mixture. The low endotoxin alkali chitosan may be used in the manufacture of other useful chitosan based products.

Disclosed is a method of preparing N-alkylated chitosan derivatives by treating chitosan with an acid and subsequently reacting the chitosan with an alkylating agent in the presence of a base. Also provided are novel N-alkylated chitosan derivatives.

Disclosed is a method of preparing N-alkylated chitosan derivatives by treating chitosan with an acid and subsequently reacting the chitosan with an alkylating agent in the presence of a base. Also provided are novel N-alkylated chitosan derivatives.

A microcapsule and a preparation method thereof, especially a multi-layer microcapsule containing an active substance and a preparation method thereof, the microcapsule having a single-layer or a multiple-layer encapsulation structure. A probiotic microcapsule and a preparation method thereof, the probiotic microcapsule having a single-layer or a multi-layer encapsulation structure. A food product or a health product containing a probiotic microcapsule (comprising a dairy product, a fermented-style food product, a beverage, chocolate, candy, a baked good, a fruit or vegetable juice product, etc. containing a probiotic microcapsule) and a preparation method thereof. A probiotic microcapsule soft powder and a preparation method thereof, the probiotic microcapsule soft powder comprising probiotic microcapsule nata de coco soft powder and probiotic microcapsule gel ball soft powder.

A microcapsule and a preparation method thereof, especially a multi-layer microcapsule containing an active substance and a preparation method thereof, the microcapsule having a single-layer or a multiple-layer encapsulation structure. A probiotic microcapsule and a preparation method thereof, the probiotic microcapsule having a single-layer or a multi-layer encapsulation structure. A food product or a health product containing a probiotic microcapsule (comprising a dairy product, a fermented-style food product, a beverage, chocolate, candy, a baked good, a fruit or vegetable juice product, etc. containing a probiotic microcapsule) and a preparation method thereof. A probiotic microcapsule soft powder and a preparation method thereof, the probiotic microcapsule soft powder comprising probiotic microcapsule nata de coco soft powder and probiotic microcapsule gel ball soft powder.

Hemostatic compositions including a combination of more than one hemostatic agent, and devices coated or impregnated therewith, have been developed. Nanotechnology yields hemostatic agents with large surface areas thereof, thereby increasing the hemostatic properties of the device to which they are applied. By combining more than one hemostatic agent and utilizing one or more different nanotechnology approaches to enhance the surface areas thereof, the capability of the dressing to stop bleeding is improved via more than one mechanism, and thus provides better hemostasis.

Hemostatic compositions including a combination of more than one hemostatic agent, and devices coated or impregnated therewith, have been developed. Nanotechnology yields hemostatic agents with large surface areas thereof, thereby increasing the hemostatic properties of the device to which they are applied. By combining more than one hemostatic agent and utilizing one or more different nanotechnology approaches to enhance the surface areas thereof, the capability of the dressing to stop bleeding is improved via more than one mechanism, and thus provides better hemostasis.