Anatomy, cell wall structure and topochemistry of waterlogged archaeological wood aged 5,200 and 4,500 years

Katarina Čufar (Avtor), Jožica Gričar (Avtor), Martin Zupančič (Avtor), Gerald Koch (Avtor), Uwe Schmitt (Avtor)

Povzetek

Deterioration grade of water logged archaeological wood is decisive to select treatments of its conservation and storage, particularly in case of valuable archaeological artefacts. For this purpose archaeological wood of ash (Fraxinus sp.) and oak (Quercus sp.) buried in waterlogged conditions at prehistoric settlements on the Ljubljansko barje (Ljubljana moor), Slovenia, aged approx. 5,200 and 4,500 years, was investigated by means of light microscopy (LM), transmission electron microscopy (TEM) and cellular UV-microspectrophotometry (UMSP). LM and TEM revealed that the ash wood aged 5,200 years was the least preserved. The secondary walls of fibres, vessels and parenchyma cells were considerably thinner than in normal wood, indicating distinct degradation. TEM and UMSP additionally revealed strong delignification of the remaining parts of the secondary walls of all cell types. The compound middle lamellae appeared structurally intact, but had lower UV-absorbance than normal wood of the same species. The cell corners were topochemically unchanged, as shown by high analogue UV-absorbance. The UV-absorbance maxima at a wavelength of 278 nm corresponded to those of hardwood lignins. The oak heartwood was generally better preserved than the ash wood. Within the same species, the 4,500 year-old samples generally appeared better preserved than those 5,200 years old.

Ključne besede

archaeological wood;light microscopy;cell wall;Quercus sp.;Fraxinus sp.;electron microscopy;UV microspectrophotometry;topochemistry;

Podatki

Jezik:	Angleški jezik
Leto izida:	2008
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL BF - Biotehniška fakulteta
UDK:	630*81
COBISS:	1621129
ISSN:	0928-1541
Št. ogledov:	1012
Št. prenosov:	271
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Vrsta dela (COBISS):	Delo ni kategorizirano
Strani:	str. 55-68
Letnik:	ǂVol. ǂ29
Zvezek:	ǂNo. ǂ1
Čas izdaje:	2008
ID:	1033421