Abstract: The present invention relates to an alginic oligosaccharic diacid composition comprising a mannuronic diacid of Formula (IV) or a pharmaceutically acceptable salt thereof, wherein n is an integer selected from 1 to 9, m is selected from 0, 1 or 2, m? is selected from 0 or 1, and wherein the total weight of alginic oligosaccharic diacid wherein n=1-5 accounts for more than 60% of the total weight of the composition; the total weight of guluronic acids accounts for less than 50% of the total weight of the composition.

Abstract: The present invention relates to the use of mannuronic diacid oligosaccharide composition in the treatment of inflammation.

Abstract: The present invention relates to the use of mannuronic diacid oligosaccharide composition in the treatment of Parkinson's disease.

Abstract: The present invention relates to the use of mannuronic diacid oligosaccharide composition in the treatment of pain.

Abstract: The present invention relates to the application of mannuronic diacid oligosaccharide composition in the treatment of vascular dementia.

Abstract: The present invention relates to the use of mannuronic diacid oligosaccharide composition in the treatment of diabetes.

Abstract: The present invention relates to a mannuronic diacid oligosaccharide composition, comprising a mannuronic diacid of Formula (III) or a pharmaceutically acceptable salt thereof, wherein n is an integer from 1 to 9, m is 0, 1 or 2, and m? is 0 or 1, and wherein the total weight of mannuronic diacids wherein n=1-5 is 80-95% of the total weight of the composition, and the ratio of the total weight of mannuronic diacids wherein n=1-3 to the total weight of mannuronic diacids wherein n=4-7 is between 1.0 and 3.5.

Abstract: The present invention relates to a method for degrading a polysaccharide in the field of food, medicine or chemical industry. In particular, a molecular chain of the polysaccharide is broken by ozone into polysaccharides with smaller molecular weights, oligoses and/or oligosaccharides. The polysaccharides include linear or branched glycans extracted from plants, traditional Chinese medicinal materials, animals, fungi, or microorganisms and sulfated polysaccharides or esterified polysaccharides formed by sulfation or esterification thereof. As an oxidizing agent in the reaction, the ozone can be used alone or can be used under the catalysis of a base, a metal ion, hydrogen peroxide, UV light, or activated carbon to accelerate the reaction.