Wyniki wyszukiwania

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Modification of ash wood with furfuryl alcohol

100%

Doczekalska B., Bartkowiak M., Zakrzewski R., Przybyl D.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2012

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tom 77

The aim of this study was modification ash wood (Fraxinus L.) with furfuryl alcohol and maleic anhydride as a catalyst. Investigated the effect of modifying on product color. The modification of wood was conducted out in two steps. In the first step was treatment with a mixture of modifying wood, and then curing at 105°C. the values of WPG for modifications carried out with aqueous solutions of furfuryl alcohol are lower than those carried out with furfuryl alcohol with the addition of maleic anhydride use in the furfurylation process pure solution of furfuryl alcohol did not cause large changes in color of wood ash in comparison to the control. The darkening of the wood surface was affected by the addition of maleic anhydride.

2

Management tools to support timber consumption

80%

Hlavackova P., Kolousek F.

Intercathedra

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2008

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tom 24

3

The effect of the late wood share upon density of the Polish pine wood as a function of its origin

80%

Chuchala D., Orlowski K., Krzosek S.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2012

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tom 77

The effect of the annual growth and the late wood share upon density of the Polish pine wood as a function of its origin. In the paper the variations of density of Polish pine (Pinus sylvestris L.) in a function of the late wood share in the annual growth with regard to the wood origin are presented. The measurement of density of wood was performed by using the stereometric method described in the works by Krzysik. This method consists in measurements the volume of the sample by determination of the various dimensions (length, width, height), and weighting of the sample mass. Nevertheless, measurements of the late wood share in the annual growth had been carried out according to own methodology which based on the classical method described in the work by Krzysik. The comparison was made for pine from natural forests derived from four different regions of Poland. The effect of the share of the late wood on the density Polish pine wood is observed. However, Pearson‘s r correlation coefficient values depend strongly on the examined wood origins.

4

Wplyw obrobki para na wlasnosci fornirow z roznych gatunkow drzew

51%

W K.

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

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1997

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tom 38

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nr 3

152-153

Ograniczanie wyników

2 Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

1 Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

1 Intercathedra

1 Bartkowiak M.

1 Chuchala D.

1 Doczekalska B.

1 Hlavackova P.

1 Kolousek F.

1 Krzosek S.

1 Orlowski K.

1 Przybyl D.

1 W K.

1 Zakrzewski R.

2 2012

1 2008

1 1997

Modification of ash wood with furfuryl alcohol

Management tools to support timber consumption

The effect of the late wood share upon density of the Polish pine wood as a function of its origin

Wplyw obrobki para na wlasnosci fornirow z roznych gatunkow drzew