Molecular composition of starch
The short structural formulae of starch and cellulose (C6H10O5)n, relative molecular weights: the molecular weight of cellulose is about 50,000 to 2,500,000 The molecular weight of starch: the molecular weight of straight-chain starch is smaller, around 50,000, and the molecular weight of branched-chain starch is much larger than that of straight-chain starch, around 60,000.
Study on the molecular weight distribution of different varieties of starch: The molecular weight distribution of 14 different varieties of starch such as cereals, potatoes and beans was determined by gel permeation chromatography. The results of the study showed that the molecular weight distribution of different varieties of starch varied greatly and all had a high dispersion. The molecular weight distribution and dispersion of starch samples of the same species from different sources were very different, even though their heavy average molecular weights were very close to each other. The molecular weight of tuberous starch is the largest among all types of starch. This study will help to understand the molecular properties of starch and guide its application in production.