Galactans


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Galactans

 

(C6H10O5)n, where n≈120, higher polysaccharides, occurring in plant tissues as reserve carbohydrates and structural elements of cell walls, as well as in animal tissues. The main elementary units of galactans are pyranose residues of galactose, joined by glycoside bonds between the first through fourth, as well as first through third and first through sixth, carbon atoms. Galactan metabolism has been little studied. Galactans form the carbohydrate part of agar and are a component of pectins and many plant gums, mucilages, and so on.

References in periodicals archive ?
Gelling galactans from the algal community of Furcellaria lumbricalis and Coccotylus truncatus (the Baltic Sea, Estonia): a structure-property study.
For the hybrid galactan mixture extracted from the biomass of this algal community containing F.
02 M KOH) alkali concentrations when the galactan matrix is not saturated by potassium ions yet.
Special attention was paid to the dependence of gel strength on the homogeneity and sulphur content of the galactans [13].
At that time the relationships between various gelling properties of algal galactans were not exactly known yet, especially in the case of the seaweed species mentioned.
The voluminous experimental results revealed also that the algae investigated initially do not contain gelling galactans of average molecular mass in the interval of 60-140 thousand [18].
Some technical analyses of the composition (ash and sulphur content mainly) of galactans have been performed almost from the beginning of the project.
since the content and location of methyl and sulphate groups in disaccharide units are the major causes of structural and rheological differences between various galactans.
Reliability and advantages of various methods of functional group analysis in algal galactans have been investigated during a long period.
From this standpoint, the most suitable medium for extraction with simultaneous modification of these algal galactans is potassium hydroxide solution at a concentration of 0.
Red algal galactans from Furcellaria lumbricalis (the Baltic Sea, Estonia): structures and their modification.
Structure of gelling galactans from the red alga Furcellaria lumbricalis (the Baltic Sea, Estonia).