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Dive into the research topics where J Zawadzki is active.

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Featured researches published by J Zawadzki.


European Journal of Wood and Wood Products | 2012

XRF examination of matrix uniqueness in chosen deciduous wood species

T. Zielenkiewicz; A Radomski; J Zawadzki

Matrix uniqueness in different wood species was analysed using X-ray spectrometry in order to specify, whether separate calibration for particular species is required. Results of XRF measurements of three deciduous species specimens were compared: oak (Quercus robur L.), beech (Fagus sylvatica L.) and birch (Betula pendula). Three forms of specimens were examined: solid wood, powdered wood and pelletized powdered wood. Results show that each species is definitely a different matrix, as well as each form of a sample. It means that different calibration is needed for each species in order to perform quantitative analysis. Comparison of results of the same species samples should be performed for samples of the same form.ZusammenfassungUm zu bestimmen, ob eine getrennte Kalibrierung bestimmter Holzarten notwendig ist, wurde mit einem Röntgenspektrometer untersucht, wie diese als Matrix die Ergebnisse beeinflusst. Die Ergebnisse der Röntgenfluoreszenzmessung der drei Laubholzarten Eiche (Quercus robur L.), Buche (Fagus sylvatica L.) und Birke (Betula pendula) wurden verglichen und zugleich jeweils in den drei Probenformen Massivholz, Holzmehl und Holzpellets untersucht. Die Ergebnisse zeigen, dass jede Holzart sowie jede Probenform eine unterschiedliche Matrix darstellt. Dies bedeutet, dass für eine quantitative Analyse eine getrennte Kalibrierung für jede Holzart notwendig ist. Für den Vergleich innerhalb einer Holzart sollte jeweils die gleiche Probenform verwendet werden.


Annals of Warsaw Agricultural University. Forestry and Wood Technology | 2006

Benzene Substitution in Wood Analysis

A. Antczak; A Radomski; J Zawadzki


X-Ray Spectrometry | 2012

XRF spectrometer calibration for copper determination in wood

T. Zielenkiewicz; J Zawadzki; A Radomski


Archive | 2011

THE INFLUENCE OF TIME AND TEMPERATURE OF BEECH WOOD (FAGUS SYLVATICA L.) HEAT TREATMENT IN SUPERHEATED STEAM ON THE CARBOHYDRATES CONTENT

Jakub Gawron; J Zawadzki; T. Zielenkiewicz; A Radomski


Drewno : prace naukowe, doniesienia, komunikaty | 2016

The influence of heat treatment on the physico-chemical properties of pinewood (Pinus Sylvestris L.)

J Zawadzki; Jakub Gawron; A. Antczak; T Klosinska; A Radomski


Bioresources | 2014

The Study of Glucose and Xylose Content by Acid Hydrolysis of Ash Wood (Fraxinus excelsior L.) after Thermal Modification in Nitrogen by HPLC Method

Jakub Gawron; Andrzej Antczak; Sławomir Borysiak; J Zawadzki; Adam Kupczyk


Archive | 2011

ANALYSIS OF WOOD CELLULOSE MECHANICAL DEGRADATION DURING BEATING PROCESS

J Zawadzki; A Radomski; T. Zielenkiewicz; Piotr Przybysz; Agnieszka Wysocka-Robak; Abstr Act


Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology | 2011

Contents of the selected structural and non-structural compounds in antique wooden flooring

A Rozanska; T Rompa; Jakub Gawron; J Zawadzki


Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology | 2010

Influence of urban environment originated heavy metals pollution on the content of extractives, cellulose and lignin in the oak wood.

D Krutul; T. Zielenkiewicz; A Radomski; J Zawadzki; M Drozdzek; A. Antczak


Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology | 2007

The content of chemical substances in the bark, rose and wood of common oak (Quercus petraea Liebl.)

D Krutul; J Zawadzki; A Radomski; T. Zielenkiewicz; A. Antczak

Collaboration


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A Radomski

Warsaw University of Life Sciences

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A. Antczak

Warsaw University of Life Sciences

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T. Zielenkiewicz

Warsaw University of Life Sciences

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Jakub Gawron

Warsaw University of Life Sciences

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M Drozdzek

Warsaw University of Life Sciences

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D Krutul

Warsaw University of Life Sciences

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T Klosinska

Warsaw University of Life Sciences

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Adam Kupczyk

Warsaw University of Life Sciences

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Andrzej Antczak

Warsaw University of Life Sciences

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