arabann.
/ˈarəban/, U.S. /ˈɛrəˌbæn/ Chemistry.
Any polysaccharide composed of or containing a number of arabinose residues, esp. that present in gum arabic (cf. arabin n.).
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arabin1832
araban1891
1891 Jrnl. Chem. Soc. 60 ii. 1179 Those constituents of the cell wall which dissolve easily in dilute mineral acids, with formation of glucose, he [sc. E. Schulze] calls hemicelluloses, and distinguishes them by the names of galactane, arabane, xylane, according as they yield galactose, arabinose, or xylose.
1892 Jrnl. Soc. Chem. Industry 11 931/1 The Pentosans (Wood-Gum, Xylan, and Araban) of Lignified Fibre.
1912 C. A. Browne Handbk. Sugar Anal. xix. 546 Among the arabans, or substances which yield l-arabinose upon hydrolysis, are arabinic acid, pectose, pectin, [etc.].
1943 Thorpe's Dict. Appl. Chem. VI. 155/2 Araban..yields arabinose, galactose and glycuronic acid on hydrolysis.
1948 R. J. McIlroy Chem. Polysaccharides iv. 28 Pure arabans, or arabinose polysaccharides, are comparatively rare and have been found only in association with pectin.
2008 Bioresource Technol. 99 3858/2 The minor sugars of galactan, araban, and mannan measured in this study were comparable to the literature values.
This entry has been updated (OED Third Edition, September 2013; most recently modified version published online December 2021).
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n.1891- two-week
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