Your search resulted in 4 documents.
Investigation into the heterogeneous nature of the impregnability of some poplar hybrids
1995 - IRG/WP 95-40052
Retention figures of some poplar hybrids are very heterogeneous when pressure impregnated. This makes it hard to prescribe impregnation processes for fast grown poplars that make it suitable for higher hazard uses. In order to gain fundamental knowledge in their variability in impregnation properties two trees were selected for a detailed investigation. Both trees originate from the same plantatio...
J Van Acker, M Stevens
Influence of clonal variability on the impregnability of poplar hybrids. (+ correction document of 23 April 1990)
1990 - IRG/WP 3614
The new Western European poplar clones (Populus nigra x deltoides and Populus trichocarpa x deltoides) were compared with the reference clone 'Robusta' and some old hybrids. Samples (5x5x50 cm³) with pure tangential/radial surfaces were sawn, including the transition zone between heartwood and sapwood. Treatment by a standard vacuum-pressure impregnation cycle with CCA showed a ...
J Van Acker Van, M Stevens, C De Haas
A comparative study of some anti-splitting devices, using Eucalyptus saligna and hybrids of Eucalyptus saligna X Eucalyptus spp poles
1983 - IRG/WP 3251
It is commom for some Brazilian wood pole users to require devices such as banding steel, to avoid or reduce splits at the end of Eucalyptus treated poles. On other hand users and manufacturers do not have data to confirm the effectiveness of the banding steel types normally used such as galvanized "Steel-Belt" and galvanized "Wire-Belt". For this reason a comparative study was carried out includi...
F C Geraldo, J A C Sodré
On the species problem in Nicobium castaneum (Col., Anobiidae)
1975 - IRG/WP 134
Nicobium castaneum (Oliv.) is one of the most important wood and book worms of the Mediterranean area (eg Portugal) and South Russian. It also occurs in the USA and Japan. A previous paper (Cymorek 1972) left open the question: is Nicobium castaneum one or two species? Nicobium castaneum is currently regarded as forming two varieties or sub-species - sub-specific taxa which are rarely well defined...
S Cymorek