Results 11 to 20 of about 217 (98)

The Application of Dendrochemistry to Assess Recent Changes in Environmental Chemistry of Urban Areas

Forests
Dendrochemistry was applied to a small town, Taylorville, Illinois, which has a superfund site and apparently more cases of cancer than expected based on background rates. As an ecologic study, dendrochemistry is not intended to unequivocally associate particular elements to specific illnesses, but rather dendrochemistry serves more generally to ...
Paul R Sheppard, Mark L Witten
exaly   +3 more sources

Emprego da fluorescência de raios X por dispersão de energia para o mapeamento de troncos de árvores em Campinas, São Paulo Energy dispersive X-ray fluorescence applied to mapping of tree stems in Campinas, São Paulo [PDF]

Química Nova, 2009
Dendrochemistry is based on the determination of elements retained in tree rings, which can be useful to characterize environmental occurrences. This work shows elemental mappings obtained by EDXRF of the cross section of a tree stem.
José Augusto da Col, Maria Izabel Maretti Silveira Bueno   +1 more
doaj   +2 more sources

Reconstruction of soil pH by dendrochemistry of Masson pine at two forested sites in the Pearl River Delta, South China [PDF]

Annals of Forest Science, 2008
• Soil acidification is a global concern. Base cation (Ca, Mg, Mn and Al) concentrations, as well as their molar ratios, were measured in tree rings of Masson pines (Pinus massoniana L.) from Dinghushan and Xiqiaoshan to reconstruct the historical changes in soil acidification in the Pearl River Delta, south China.
Yuanwen Kuang
exaly   +3 more sources

The use of dendrochemistry to reveal pollution history

, 2013
Tree rings provide a record of environmental change within the biological requirements of tree survival. Dendrochemistry has successfully applied several analytical techniques for solidstate analysis (e.g., energy dispersive X-ray fluorescence (EDXRF), particle-induced X-ray emission), analysis of wood extracts or digests (e.g., inductively coupled ...
Chalot, Michel, Beaujard, Francois, Roussel, Hélène, Balouet, Chris   +3 more
openaire   +3 more sources

Early- and Latewood vs. Stem Asymmetry: Which Is More Important for Dendrochemistry in Scots Pine?

Forests
For dendrochemical research, it may be important to be aware of the effects of stem asymmetry and the intra-ring structure because these may introduce unwanted dispersion in the results. In dendrochemical studies, separate analysis of the elemental content of early- and latewood is rare.
Vladimir L Gavrikov, Eugene A Vaganov
exaly   +2 more sources

Trees as sentinels of metallic pollution induced by mining along the Odiel River (Southern Iberian Peninsula)

Cuadernos de Investigación Geográfica, 2021
Mining activity is often responsible for the drainage of acid or metal-enriched waters to fluvial systems. The release of metals is especially disturbing due to the toxicity and persistence of these products and their accumulation in the biosphere. Hence,
A. Delapierre, J.A. Ballesteros-Canovas, J. Buzzi Marcos, V.I. Slaveykova, M. Stoffel   +4 more
doaj   +1 more source

Isotopic comparison and correlation of δ¹³C between bulk wood and cellulose of Vitis vinifera L.

OENO One, 2023
This study aims to compare the δ13C isotopic signal between bulk wood and α-cellulose in wood samples from the main trunk of Vitis vinifera L. to verify whether α-cellulose extraction is necessary for ecophysiological studies in this species.
Federico Roig, Federico Berli, Benjamin Bois, Olivier Mathieu, Fidel Roig, Patricia Piccoli   +5 more
doaj   +1 more source

Radial patterns of 13 elements in the tree rings of beech trees from Mavrovo National park, FYROM [PDF]

Archives of Biological Sciences, 2010
The radial patterns of 13 elements (N, P, K, Ca, Mg, Fe, Na, Mn, Zn, Cu, Pb, Cd and Co) were analyzed in the tree rings of European beech (Fagus sylvatica L.). The study site was located in an 'unpolluted' beech ecosystem in Mavrovo National Park.
Hristovski S., Melovski L.
doaj   +1 more source

Early-Wood vs. Late-Wood in Scots Pine: Finding Stable Relationships in Elemental Distribution

Sci, 2023
This study explored whether consistent differences can be found between early-wood and late-wood in terms of elemental content of tree rings. The species to study was Pinus sylvestris L. growing within an even-aged stand planted during the early 1970s in
Vladimir L. Gavrikov, Alexey I. Fertikov, Ruslan A. Sharafutdinov, Zhonghua Tang, Eugene A. Vaganov   +4 more
doaj   +1 more source

To extract or not to extract? Influence of chemical extraction treatment of wood samples on element concentrations in tree-rings measured by X-ray fluorescence

Frontiers in Environmental Science, 2023
In micro-densitometry of wood it is standard procedure to extract resin and other soluble compounds before X-ray analysis to eliminate the influence of these extractives on wood-density.
T. Scharnweber, E. Rocha, A. González Arrojo, S. Ahlgrimm, B. E. Gunnarson, S. Holzkämper, M. Wilmking   +6 more
doaj   +1 more source