Pectic substances arabans

Pectic Substances. Part 111. Composition of Apple Pectin and the Molecular Structure of the Araban Component of Apple Pectin, E. L. Hirst and J. K. N. Jones,/. Chem. Soc., (1939) 454-460. 

Hirst, E.L. Jones, J.K.N. (1939a) Pectic Substances. Part II. Isolation of an Araban from the Carbohydrate Constituents of the Pea-nut , Journal of the Chemical Society, pp. 

It will be clear that in this nomenclature arabans and galactans are not included as components of pectinic or pectic acids. They have been found in pectic preparations, but it is not known whether they represent chemically bound constituents such as side chains or are to be regarded as separate substances closely associated physically with the predominating pectinic or pectic acids. The nomenclature is thus based upon an ideal conception and should be regarded as provisional and subject to more accurate specification as knowledge increases. 

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