22.12.2012 Views

6 Wood Discoloration

6 Wood Discoloration

6 Wood Discoloration

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

118 5 Damages by Viruses and Bacteria<br />

Reviews on “bacteria and wood” are by Liese (1992), Schmidt and Liese<br />

(1994), Daniel and Nilsson (1998) and Kim and Singh (2000).<br />

Several bacteria, like Bacillus spp., Pseudomonas spp. and Streptomyces spp.,<br />

were investigated in view of antagonism (Chap. 3.8.1) against fungal parasites<br />

(Armillaria spp.: Dumas 1992), wood staining fungi (Bernier et al. 1986; Seifert<br />

et al. 1987; Benko 1989; Florence and Sharma 1990) and decay fungi (Benko<br />

and Highley 1990).<br />

Bacteria are currently discussed in connection with the hygiene status of<br />

wood used for packing, transport, and preparation of foodstuffs. A study, which<br />

compared wooden and plastic boards used in kitchens, revealed that especially<br />

pine boards possess hygienic advantages due to its extractives compared to<br />

other woods and plastic (Milling et al. 2005).<br />

Pretreatment of spruce wood chips with the actinobacterium Streptomyces<br />

cyaneus (Krasil’nikov) Waksman for mechanical pulping decreased the energy<br />

consumption during fiberizing of 24% and increased some strength properties<br />

of handsheets (Hernández et al. 2005).<br />

To identify bacteria, predominantly on the basis of morphological and biochemical<br />

characteristics, “Bergey’s Manual of Determinative Bacteriology”<br />

(Buchanan and Gibbons 1974) is suitable. “Bergey’s Manual of Systematic Bacteriology”<br />

(Garrity 2001 et seq.) is the classic reference on bacterial taxonomy<br />

considering numerous rearrangements and changes in nomenclature, which<br />

are mainly due to molecular techniques notably sequencing of 16S rDNA and<br />

analysis of fatty acids.<br />

www.taq.ir

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!