1. A method of preparing food material, including changing the molecular structure of biomass polysaccharides containing polysaccharides in the form of cellulose, hemicellulose or starch, to obtain a food material having nutrient availability exceeding that of biomass nutrients. ! 2. The method according to claim 1, further comprising providing food material to an animal, in particular a human, or crop. ! 3. The method according to claim 1 or 2, further comprising the use of food material in agronomy, in particular in a hydroponic solution or in aquaculture. ! 4. The method according to claim 1, where the source material further comprises an enzyme. ! 5. A composition containing saccharide elements organized in a molecular chain, where from about 1 out of every 2 to about 1 out of every 250 saccharide elements contains a group of carboxylic acid, or its ester or salt, and the composition is suitable for use as a food material . ! 6. The composition according to claim 5, where the composition includes many such chains. ! 7. The composition according to claim 6, in which from about 1 out of every 5 to about 1 out of every 250 saccharide elements of each chain contains a group of a carboxylic acid, or its ester or salt, in particular from about 1 out of every 8 to about 1 out of every 100, or from about 1 out of 10 to about 1 out of every 50 saccharide elements of each chain contains a group of a carboxylic acid, or its ester or salt. ! 8. The composition according to claim 6, in which each chain has from about 10 to about 200 saccharide elements. ! 9. The composition of claim 8,1. Способ подготовки пищевого материала, включающий изменение молекулярной структуры полисахаридов биомассы, содержащей полисахариды в форме целлюлозы, гемицеллюлозы или крахмала, для получения пищевого материала, имеющего доступность питательных веществ, превышающую доступность питательных веществ биомассы. ! 2. Способ по п.1, дополнительно включающий предоставление пищевого материала животно
