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Effects of chemical pretreatment of Douglas-fir heartwood on efficacy of potential bioprotection agents
1990 - IRG/WP 1440
Biological protection against wood decay fungi represents an environmentally attractive alternative to the use of chemicals; however, the process of identifying suitable candidates and the conditions that ensure successful protection pose major challenges. One critical aspect of this problem is to identify organisms that can rapidly and uniformly colonize the wood. Wood contains low levels of nutr...
B Dawson-Andoh, J J Morrell


Worldwide in-ground stake test of acetylated composite boards
1997 - IRG/WP 97-40088
Acetylated wood composite stakes are being tested in ground contact (graveyard test) in seven fields around the world. Three types of acetylated wood composites were prepared: spruce fiberboard in Sweden, aspen fiberboard in Madison and rubber wood particle board in Indonesia. Two levels of acetylation were used, a high level of ~20% acetyl content and a low level of 10% acetyl content. Control bo...
R M Rowell, B S Dawson, Y S Hadi, D D Nicholas, T Nilsson, D V Plackett, R Simonson, M Westin


Ponding of radiata pine (Pinus radiata) - 1. The effect of bacteria on wood
1998 - IRG/WP 98-10265
Radiata pine (Pinus radiata) wood panels which had been ponded for periods ranging from 2 to 12 weeks were examined by light microscopy, confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) for bacterial colonisation of wood and degradation of pit membranes. After 2 weeks of ponding bacteria colonised the outer few cells of wood, ...
A P Singh, Y S Kim, U Schmitt, B S Dawson


Ponding of radiata pine (Pinus radiata) - 2. The effect of ponding on coating penetration into wood
1998 - IRG/WP 98-10249
Radiata pine (Pinus radiata) wood panels which had been ponded for periods ranging from 2 to 12 weeks, dried and subsequently coated with a primer and examined by light microscopy after staining sections with Sudan IV to enhance the contrast of the primer material. A correlation between the extent of ponding and the extent of coating penetration into wood was observed. The coating penetration var...
A P Singh, S S Gallagher, U Schmitt, B S Dawson, Yoon Soo Kim