Woodworkers' exposure to tannins

Abstract

The tannin concentration of hard- and soft-wood dust was determined in dust powder and in samples on filters. It varied from 1.6 +/- 0.3 mg g-1 (+/- SD) for fir, which is a soft wood, to 80 +/- 30 mg g-1 (+/- SD) for oak, which is a hard wood. The low detection limit of the spectrophotometric method (1.5 micrograms per sample) made the analysis possible with no interference from cellulose ester filters. In five woodworking shops the concentrations of the total dust varied from 0.2 to 20 mg m-3, while those of tannins varied from 2 to 341 micrograms m-3. As hard woods like oak or mahogany have a higher tannin concentration than soft woods, tannin concentration analysis in wood dust can be used as an indicator of exposure to hard-wood dust.

Reactions of Tannins with Human Serum Proteoglycans

“…The use of tannic acid equivalents in the simple colorimetric analysis of wood is interesting to note the specific loss of the said band. dust samples 5 is straightforward to detect hard wood…”

“…hard woods contain more tannins than soft wood, 5 and (mean ± SD, n = 44). The protein content in the same the tannin concentration of the suspended dust in the samples was determined with a Protein Assay ESL kit workroom air can be used to distinguish between hard (Boehringer Mannheim), and it was 844 ± 1.4 mg l −1…”

“…[1][2][3] The carand then the proteoglycan fraction was precipitated cinogenic agents in the dust are not known, although with cetylpyridinium chloride. 22 The isolates were disformaldehyde 4 and wood tannins 5 have been suggested solved in physiological saline and their glycan content to play a role. The latter suggestion is interesting, as was determined 26 and adjusted to 24 ± 3 mg/l −1…”

“…5 Alimentary or other (mean ± SD, n = 44). consumer products of plant origin often contain tannins, Tannin fractions were extracted from spruce and oak be it tea and coffee, 6 beer, 7 cotton fibres 8 or fruits.…”

“…consumer products of plant origin often contain tannins, Tannin fractions were extracted from spruce and oak be it tea and coffee, 6 beer, 7 cotton fibres 8 or fruits. 9 samples, 5 and standard tannic acid (Aldrich) solution Over 500 polyphenolic tannin components have been was prepared. Quadruple samples of proteoglycans identified, 10 some of which have important effects in (5 ml) were then incubated with 5, 25 or 50 g ml…”