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ARS Home » Midwest Area » Madison, Wisconsin » U.S. Dairy Forage Research Center » Research » Publications at this Location » Publication #188599
Title: STRUKTURUNTERSUCHUNGEN AN LIGNINEN AUS GETREIDEBALLASTSTOFFEN (STRUCTURAL INVESTIGATION OF LIGNINS FROM GRAIN INDIGESTIBLE FIBER)

Author
item BUNZEL, MIRKO - UNIV. OF HAMBURG, GERMANY
item Ralph, John
item KIM, HOON - UNIV. OF WISCONSIN-MADISO
item STEINHART, HANS - UNIV. OF HAMBURG, GERMANY

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 9/5/2005
Publication Date: 9/5/2005
Citation: Bunzel, M., Ralph, J., Kim, H., Steinhart, H. 2003. Strukturuntersuchungen an ligninen aus getreideballaststoffen (Structural investigation of lignins from grain indigestible fiber)[abstract]. Food Chemistry Conference of Northern Germany. Lebensmittelchemie. 57(3):59

Interpretive Summary:

Technical Abstract: Plant cell walls containing suberin or lignin in the human diet are conjectured to protect against colon cancer. To prove the existence of real lignin (not only “Klason-lignin”) in cereal grain dietary fibres, the DFRC (derivatization followed by reductive cleavage) method was applied to different cereal grain dietary fibres. By cleavage of diagnostic arylglycerol-beta-aryl (beta-O-4) ether linkages, and identification of the liberated monolignols, we ascertained that lignins are truly present in cereal grains. From the ratios of the liberated monolignols coniferyl alcohol and sinapyl alcohol we suggest that lignin compositions vary among cereals. Furthermore, dimeric cross-coupling products, comprising of ferulate and coniferyl alcohol, were identified in most cereal fibres investigated. These ferulate 4-O-beta- and 8-beta-coniferyl alcohol cross-coupled structures indicate active cross-coupling of polysaccharides to lignin precursors via ferulate.