Issues lignin

Dietary fibre, which comprises all the non-digestible structural carbohydrates of plant cell walls and any associate lignin, provides a further example of a complex food-borne factor which cannot be classified as a nutrient, and which continues to generate debate over such issues as definition and analytical techniques. However, whatever the unresolved complexities, dietary fibre has a lengthy history and had proved itself eminently suitable as a component of functional food products long before the term was even coined. 

The papers on the "Degradation of Lignin in Geological Environments a ppeared in a special issue of Geochimica et Cosmochimica Acta. 

The issue of column loading was further investigated by injecting 200 /iL samples from stock organosolv lignin solutions of 5, 1 and 0.5 mg/mL. 

Since all of the model compounds examined were monomeric lignin-like structures, our current studies do not address the possibility of an intramolecular photochemical initiated reaction contributing to brightness reversion. Investigations directed at examining this latter issue are ongoing. 

A mixture of three newspapers issued in Korea was used as substrate. Newspaper was cut into approx 0.5 x 0.5 cm pieces. The moisture of the paper was 6.8 wt% with the following composition 56.2 wt% glucan, 13.9 wt% xylan + mannan + galactan (XMG), 15.0 wt% klason lignin, and 7.4 wt% ash. The nonionic surfactants (TCI Tokyo Kasei Kogyo, Tokyo, Japan) used are listed in Table 1. 

BOUDET, A. M., Lignins and lignification Selected issues., Plant Physiol. Biochem., 2000,38,81-96. 

Harbour JR, Hopper MA, Marchessault RH, Dobbin CJ, Anczurowski E (1985) Photoacoustic spectroscopy of cellulose, paper and wood J Pulp Pap Sci 11 J42-J47 Hauser M, Oelichmann J (1988) A critical comparison of solid sample preparation techniques in infrared spectroscopy Microchim Acta (Wien), Spec Issue, I 39-43 Hergert HL (1971) Infared spectra In Sarkanen KV, Ludwig CH (eds) Lignins Occurrence, formation, structure and reactions Wiley-Interscience, New York, 267-293 Hirschfeld T (1987) In McClure GL (ed) Computerized quantitative infrared analysis ASTM, Philadelphia, 169-179... 

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