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1

Impact of raw material quality versus production of construction elements

100%
Wieruszewski M., Gotych V., Hruzik G. J., Mirski R., Lis B.
Intercathedra
|
2012
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tom 28
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nr 3
For the production of wooden construction determining the quality of pinewood to be used is of vital importance. Material on which the research was carried out came from two quality classes: WBO and WCO. Large-size as well as laboratory samples were obtained from the material to undergo tests of their physical and mechanical parameters. As the result of quality classification process of construction materials the impact of raw material quality on the parameters of semi-finished products used for the production of wooden construction was determined.
2
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The chemical composition of oak wood after prolonged influence of variable weather conditions

72%
Krutul D., Zielenkiewicz T., Zawadzki J., Radomski A., Antczak A., Drozdzek M.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2015
|
tom 92
3
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Comparative studies of ipe (Tabebuia spp.) wood photodegradation cause by treatment with outdoor and indoor UV-A light irradation

58%
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.
4
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Comparison of the chemical composition of domestic common hornbeam (Carpinus betulus L.) wood and exotic yakal (Shorea astylosa Foxw.) wood

58%
Sierant D., Antczak A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2020
|
tom 112
5
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The chemical composition of poplar wood in relation to the species and the age of trees

58%
Krutul D., Antczak A., Klosinska T., Radomski A., Drozdzek M., Zawadzki J.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2019
|
tom 107
6
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Analysis of quantitative and qualitative extractive components extracted from hornbeam (Carpinus betulus L.) and yakal (Shorea astylosa Foxw.) wood

58%
Sierant D., Szadkowska D.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2022
|
tom 117
7
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Influence of knots on the content of chemical substances in knot adjacent oak wood (Quercus petraea Liebl.)

58%
Krutul D., Zielenkiewicz T., Zawadzki J., Radomski A., Antczak A., Drozdzek M.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 83
8
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Initial studies on the influence of Aspergillus niger on the wood components of Populus sp.

58%
Lisiecka E., Lesiak A., Szadkowski J., Szadkowska D., Radomski A., Andres B.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2020
|
tom 110
9
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The chemical composition of poplar wood in relation to the species and age of trees

58%
Krutul D., Klosinska T., Antczak A., Drozdzek M., Radomski A., Zawadzki J.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2019
|
tom 105
10
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The influence of thermal modification in oil on the selected chemical components content in beech wood (Fagus sylvatica L.)

58%
Gawron J., Klosinska T., Zawadzki J., Archanowicz E., Kolek L.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 82
11
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Determination of the structural substances content in the field maple wood (Acer campestre L.) - comparsion of the classical methods with instrumental

58%
Antczak A., Michaluszko A., Klosinska T., Drozdzek M.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 82
12
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The influence of thermal modification in oil on the extractive substances and polysaccharides content in oak wood (Quercus sp. L)

58%
Klosinska T., Gawron J., Zawadzki J., Antczak A., Kurzynowski M.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 83
13

Comparison of chemical composition of archeological and contemporary oak and elm wood. Definition of changes in lignin system

58%
Pradzynski W., Cichocka M.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
|
2002
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tom 01
|
nr 2
14
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Impact of the environmental pollution originated from sulfur mining on the chemical composition of wood and bark of birch (Betula pendula Roth.)

51%
Krutul D., Zielenkiewicz T., Radomski A., Zawadzki J., Antczak A., Drozdzek M.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2014
|
tom 88
Impact of environmental pollution caused by sulphur mining on the chemical composition of wood and bark of birch (Betula pendula Roth.) Content of extractives, cellulose, !% NaOH soluble substances and lignin were examined. Samples were gained from cca. 70-year old birch (Betula pendula Roth.) grown in the environment polluted by sulfur mining industry. 200mm height disks were cut in the butt-end, middle and top section of the trunk. Disk from the main branch was also collected. Bark was collected from butt-end section. On the cross-section from butt-end and middle part of the trunk following zones were marked: outer, center and pith adjacent wood. On the cross-section from the top part wood was divided into outer and pith adjacent. Only one zone was marked in branch. Results show that environmental pollution caused by sulfur mining industry influences the content and distribution of extractives on the cross- and longitudinal sections. It also causes the increase of extractives content in bark. Content and distribution of 1% NaOH soluble substances are also changed on both cross-sections. Environmental pollution decreased lignin content in wood and increased this content in bark from butt-end section.
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