nigerann.

Brit.

/ˈnʌɪdʒəran/, U.S.

/ˈnaɪdʒəˌræn/

Origin: Probably a borrowing from Latin, combined with an English element. Etymons: Latin niger , -an suffix.

Etymology: Probably < classical Latin niger black (see niger n.¹), used in scientific Latin as specific epithet of the fungus Aspergillus niger (from which the substance has been extracted) + -an suffix.

Biochemistry.

An alpha-glucan which occurs in the hyphal walls of various fungi.

ΚΠ

1953 S. A. Barker et al. in Jrnl. Chem. Soc. 3087 It is now apparent that the ‘mycodextran’ structure is markedly different from those of dextrans.., so that the term ‘mycodextran’ must inevitably lead to confusion. We suggest that the polysaccharide should now be known as ‘nigeran’.

1978 Nature 25 May 268/1 Smaller increases were observed with a commercially available fungal wall glucan, nigeran, obtained from Aspergillus niger.

1986 M. Kogut tr. H. G. Schlegel Gen. Microbiol. xiv. 415 Nigeran can accumulate in the mycelia of Aspergillus and Penicilium [read Penicillium] species.

2001 FEMS Microbiol. Lett. 194 65/1 The water-insoluble α- d-glucans that contain alternate (1→3)- and (1→4)-linkages resemble nigeran (mycodextran) and have been isolated from nine species of the [lichen] genus Cladonia.

This is a new entry (OED Third Edition, September 2003; most recently modified version published online March 2022).

单词	nigeran
释义	nigerann. Brit. /ˈnʌɪdʒəran/, U.S. /ˈnaɪdʒəˌræn/ Origin: Probably a borrowing from Latin, combined with an English element. Etymons: Latin niger , -an suffix. Etymology: Probably < classical Latin niger black (see niger n.¹), used in scientific Latin as specific epithet of the fungus Aspergillus niger (from which the substance has been extracted) + -an suffix. Biochemistry. An alpha-glucan which occurs in the hyphal walls of various fungi. ΚΠ 1953 S. A. Barker et al. in Jrnl. Chem. Soc. 3087 It is now apparent that the ‘mycodextran’ structure is markedly different from those of dextrans.., so that the term ‘mycodextran’ must inevitably lead to confusion. We suggest that the polysaccharide should now be known as ‘nigeran’. 1978 Nature 25 May 268/1 Smaller increases were observed with a commercially available fungal wall glucan, nigeran, obtained from Aspergillus niger. 1986 M. Kogut tr. H. G. Schlegel Gen. Microbiol. xiv. 415 Nigeran can accumulate in the mycelia of Aspergillus and Penicilium [read Penicillium] species. 2001 FEMS Microbiol. Lett. 194 65/1 The water-insoluble α- d-glucans that contain alternate (1→3)- and (1→4)-linkages resemble nigeran (mycodextran) and have been isolated from nine species of the [lichen] genus Cladonia. This is a new entry (OED Third Edition, September 2003; most recently modified version published online March 2022). < n.1953
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