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Title:Changes of ashwood pH-value during conventional drying
Authors:ID Straže, Aleš (Author)
ID Torkar, Sandi (Author)
ID Tišler, Vesna (Author)
ID Gorišek, Željko (Author)
Files:.pdf PDF - Presentation file, download (279,40 KB)
MD5: BEBBC46262B7DBF0317D0787E09BE6FD
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo SciVie - Slovenian Forestry Institute
Abstract:Changes of pH of sawn wood during conventional drying were studied. Green ashwood boards (Fraxinus excelsior L.), 25.4 mm in thickness, were exposed to 1 month air drying and to kiln drying using 7 schedules, reached by varying temperature (20°C, 30°C and 65°C) and relative air humidity (33% to 90%). Wood samples for pH and moisture content (MC) determination were taken in successive time interval at 3 board`s depths (1/10, 1/3 and 1/2 of thickness).MC was established gravimetrically. pH-value determination of solid wood water system by suspending wood dust into distilled water was used. The lowest used temperature and duration of drying procedure had not significant influence on wood pH. Wood acidification was confirmed at higher drying temperatures (30°C and 65°C), particularly with lower drying rates and prolongation of the procedure. Among all the factors, drying temperature had the greatest impact on the pH-value of wood.
Keywords:ash-wood, pH-value, drying, drying conditions
Year of publishing:2003
Publication status in journal:Published
Article version:Publisher's version of article
Number of pages:str. 107-124
Numbering:Vol. 71
COBISS.SI-ID:1122953 New window
UDC:630*847.275
ISSN on article:0351-3114
URN:URN:NBN:SI:doc-S8WFRL7W
Publication date in DiRROS:12.07.2017
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Record is a part of a journal

Title:Zbornik gozdarstva in lesarstva
Shortened title:Zb. gozd. lesar.
Publisher:Gozdarski inštitut Slovenije
ISSN:0351-3114
COBISS.SI-ID:6206978 New window

Secondary language

Language:English
Title:Spreminjanje pH-vrednosti jesenovine pri konvektivnem sušenju
Abstract:Raziskovano je bilo spreminjanje pH-vrednosti lesa med procesom naravnega in komorskega sušenja žaganega lesa. Les velikega jesena (Fraxinus excelsior L.), debeline 25 mm, je bil sušen pod sedmimi konstantnimi sušilnimi režimi, z uporabo 3 temperatur (20°C, 30°C in 65°C) in relativnih zračnih vlažnosti med 33% in 90%. Vzporedno je potekalo zračno sušenje jesenovine v spomladanskih kontinentalnih klimatskih razmerah. Določanje pH vrednosti in lesne vlažnosti je potekalo z odvzemanjem vzorcev v zaporednih časovnih intervalih na 3 globinah žaganic (1/10, 1/3 in 1/2 debeline). Lesna vlažnost je bila določena gravimetrično, pH-vrednost lesa pa z vodno ekstrakcijsko metodo. Vrednosti pH jesenovine se pri sušenju z najnižjo temperaturo niso spremenile. Z višanjem temperature sušenja (30°C in 65°C) se je pH jesenovine značilno zmanjšala, še posebej pri daljšem sušenju in ob uporabi vlažnejših klimatskih razmer v komori. Temperatura sušenja je imela med vsemi dejavniki najbolj izrazit vpliv na pH lesa.
Keywords:jesenovina, pH-vrednost, sušenje, sušilne razmere


Collection

This document is a part of these collections:
  1. Acta Silvae et Ligni

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