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1
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The effect of polymethyl methacrylate impregnation on mechanical properties of pine wood degraded by fungi

100%
Jankowska A., Krajewski K., Tarasiuk S.
Drewno. Prace Naukowe. Doniesienia. Komunikaty
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2010
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tom 53
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nr 183
This paper presents results of investigations into possibility of using polymethyl methacrylate to reinforce wood degraded by Phellinus pini (Thore) Fr. fungus. It was found that impregnation of wood with the resin causes an increase in mechanical properties. Nevertheless this increase is relatively greater for wood degraded by biological agents than for undamaged wood. The behaviour of wood-resin system after artificial ageing in laboratory conditions was observed. The strength of wood treated with the resin was lower after artificial ageing than the strength of wood without ageing. Similar tendencies of changes were observed both in the case of wood degraded by biological agents and in the case of undamaged wood.
2
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Delignification of valuable timbers decayed by India lignicolous fungi

100%
Nagadesi P. K., Arya A.
International Letters of Natural Sciences
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2014
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tom 11
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nr 2
Wood degrading capacity of lignicolous fungi was studied by decay test. In which two methods were followed, i) wood chips method ii) wood block method. Eight timbers infected by six fungi were selected for studying percentage of decay and biochemical test was done to know delignification. After 12 months, 90 % of wood block of T. arjuna was decayed by L. stereoides. In teak wood 16.82 % of decay was due to H. apiaria in 3 months. As the percentage of moisture was less, percentage of weight loss was also less; this indicated that decay capacity of fungi will depends on % moisture content in wood. The percentage loss in hot water soluble substrates was more in case of T. crenulata due to L. stereoides for 5 months, whereas lowest in case of teak wood decayed by H. apiaria for 5 months. The percentage loss in ethanol benzene soluble substrate was more in case of Adina wood decayed by C. versicolor for 5 months, whereas lowest in case of teak wood infected with L. stereoides for 3 months. As the incubation period increases, percentage loss in acid soluble lignin was more in case of infected woods. L. stereoides, C. versicolor, and H. apiaria showed selective delignification in all infected woods, whereas T. pini showed simultaneous degradation of lignin in all woods tested. The valuable timber like teak wood was not resistant to wood decay because they loss 50% of lignin. The in vitro wood decay test can‟t be taken as absolute evidence for wood decay behavior of lignin-degrading fungi, so we should conform decay of wood by consider biochemical test. For rapid evaluation of wood decay the wood chip method was best suitable. For the first time the wood decay and biochemical test of 8 wood samples infected by white rot fungi like S. commune, L. stereoides, H. apiaria, C. versicolor, T. pini and soft rot fungi like T. viride was studied.
3
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Chosen aspects of degradation of spruce wood used in outdoor conditions

80%
Rebkowski B., Krajewski K. J.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
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2013
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tom 84
4
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Comparative studies of ipe (Tabebuia spp.) wood photodegradation cause by treatment with outdoor and indoor UV-A light irradation

80%
Zborowska M., Stachowiak-Wencek A., Waliszewska B., Pradzynski W.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
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2014
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tom 88
Comparative studies of ipe (Tabebuia spp.) wood photodegradation cause by treatment with outdoor and indoor UV-A light irradiation. A study on photodegradation of ipe (Tabebuia spp.) wood by UV A light has been carried out. Two types of lamps were used in the tests, i.e. a UVA-340 lamp with a wavelength of 290 - 400 nm, emitting light resembling natural light, an a UVA-351 lamp with a wavelength of 300 - 400 nm, imitating light found indoors penetrating through window panes. Colour of the samples was measured using a Datacolour 600 spectrophotometer prior and after 1,5, 10, 25, 50 and 100-hour irradiation. Characterization of investigated material included determination of its chemical components. Despite the fact that ipe wood contains high concentrations of components playing an important role in the photodegradation process (e.g. 37.2% lignin) the detected changes are minor and do not exceed 1 point. The change in colour (∆E) for ipe wood surface was mainly caused by changes in the chromatic coordinate (b*) and the lightness coordinate (L*). Greater changes occurred under the influence of a UV-340 lamp emitting the type of light resembling that found outdoors.
5
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Evaluation of selected characteristics of thermal degradation of wood material modified by coatings with the occurence of risk substances

80%
Ruzinska E., Mitterova I., Osipiuk J.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 84
6
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Comparative studies of ipe (Tabebuia spp.) wood photodegradation caused by treatment with acid and alkaline buffers

80%
Zborowska M., Stachowiak-Wencek A., Waliszewska B., Pradzynski W.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
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2014
|
tom 88
Comparative studies of ipe (Tabebuia spp.) wood photodegradation caused by treatment with acid and alkaline buffers. A study on photodegradation of ipe wood using xenon lamp and UV lamp light has been carried out. Colour of the samples was measured using a Datacolour 600 spectrophotometer prior to their soaking in acid and alkaline buffers, after soaking and successively after 1, 5, 10, 25, 50 and 100-hour irradiation. It was concluded that the treatment with acid and alkaline buffers causes opposite changes of the investigated colour coordinates. Samples after treatment with the acid buffer were lighter and yellower in colour, but less red, while after treatment with the alkaline buffer they were darker and redder, bur less yellow. Generally treatment with the alkaline buffer caused more significant changes of ipe wood in comparison to treatment with the acid buffer. Samples treated with the acid buffer were more prone to changes of colour (∆E*) due to light irradiation in comparison to the samples treated with the alkaline buffer. More significant changes of colour were observed in the case of UV irradiation in comparison to irradiation cause by xenon lamp light.
7
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Initial studies on the influence of Aspergillus niger on the wood components of Populus sp.

80%
Lisiecka E., Lesiak A., Szadkowski J., Szadkowska D., Radomski A., Andres B.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
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2020
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tom 110
8
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Evaluation of the fungicidal properties of essential oils from Leptospermum scoparium and Azadirachta indica in relation to selected fungi causing wood decay

80%
Swistak J., Betlej I.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
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2020
|
tom 110
9

Ocena stopnia degradacji drewnianych obiektow archeologicznych z najcenniejszych znalezisk wielkopolskich

71%
Zborowska M., Spek-Dzwigala A., Waliszewska B., Pradzynski W.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
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2004
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tom 03
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nr 2
139-151
10

Badanie stopnia degradacji i stabilizacji wymiarowej mokrego drewna wykopaliskowego

61%
Babinski L.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
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2005
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tom 04
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nr 1
151-169
11

Mikroorganizmy zasiedlajace wspolczesne drewno sosny [Pinus sylvestris L.] w glebie torfowej stanowiska archeologicznego w Biskupinie

51%
Gajewska J., Kostecka J.
Acta Agraria et Silvestria. Series Silvestris
|
2007
|
tom 45
27-37
Microorganisms colonizing a contemporary pine wood (Pinus sylvestris L.) stored in a peat soil of the archaeological site in Biskupin. The experiment was conducted on the archaeological SP1 and SP4 sites in Biskupin. Both dry and wet samples of the contemporary pine wood (Pinus sylvestris L.) were exposed in the layer of peat at the 50 and 100 cm of depth and in a peaty layer at the bottom of a trench, where other wooden constructions from the Lusatian settlement were deposited. The experimental samples were recovered after two years of deposition for physical, chemical and microbiological examinations. It was observed, that pine wood were colonized by a different saprophytic and pathogenic bacteria and microscopic fungi. The main­tenance of an anoxic condition can reduce the occurrence of cellulolytic actinomycetes strains and microscopic fungi and can limit the speed of wood decay.
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