<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Minganti, Vincenzo</style></author><author><style face="normal" font="default" size="100%">Drava, Giuliana</style></author><author><style face="normal" font="default" size="100%">De Pellegrini, Rodolfo</style></author><author><style face="normal" font="default" size="100%">Anselmo, Marco</style></author><author><style face="normal" font="default" size="100%">Modenesi, Paolo</style></author><author><style face="normal" font="default" size="100%">Malaspina, Paola</style></author><author><style face="normal" font="default" size="100%">Giordani, Paolo</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The bark of holm oak (Quercus ilex, L.) for airborne Cr(VI) monitoring.</style></title><secondary-title><style face="normal" font="default" size="100%">Chemosphere</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Bioindicator</style></keyword><keyword><style  face="normal" font="default" size="100%">ET-AAS</style></keyword><keyword><style  face="normal" font="default" size="100%">Hexavalent chromium</style></keyword><keyword><style  face="normal" font="default" size="100%">Tree bark</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In this work, the bark of holm oak was used as a bioindicator to study the atmospheric distribution of Cr(VI). The chosen method (alkaline extraction and atomic absorption determination) was found in the literature, adapted for use with the matrix involved, and validated. The method had some limits, but provided an excellent estimation of Cr(VI) concentrations with good sensitivity and a reasonable time of analysis and cost. Thirty-four samples of holm oak collected in three areas characterised by different possible sources of pollution (the area near a former chromate production plant, an urban area, and a rural &quot;reference&quot; area) were analysed, obtaining concentrations ranging from 1.54 to 502μgg(-1) near the industrial plant, ranging from 0.22 to 1.35μgg(-1) in the urban area, and mostly below the detection limit (0.04μgg(-1)) in the rural area. The bark of holm oak proved to be a good bioindicator to detect Cr(VI) in the environment. The extraction procedure followed by atomic absorption analysis is simple, provides good sensitivity, and it is suitable for environmental studies.</style></abstract><accession-num><style face="normal" font="default" size="100%">24630451</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santamaria, J M</style></author><author><style face="normal" font="default" size="100%">Martin, A</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Tree bark as a bioindicator of air pollution in Navarra, Spain</style></title><secondary-title><style face="normal" font="default" size="100%">Water, Air, &amp; Soil Pollution</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">air pollution</style></keyword><keyword><style  face="normal" font="default" size="100%">Bioindicator</style></keyword><keyword><style  face="normal" font="default" size="100%">biomonitoring</style></keyword><keyword><style  face="normal" font="default" size="100%">Tree bark</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1997</style></year></dates><volume><style face="normal" font="default" size="100%">98</style></volume><pages><style face="normal" font="default" size="100%">381-387</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">During a two year research period from 1992 to 1993, samples of different species of trees were taken in 17 forest stands located in Navarra, Spain. From these samples, bark extracts were prepared in which the pH and the conductivity were measured. The health of the sampling trees was also evaluated by determining the degree of defoliation and decoloration of the canopies. The bark tissue analysis revealed the presence of an environmental acidity gradient that decreased from NW to SE. This coincides with the location of important sources of pollution and their course of transport and dispersion. On the other hand, in the samples of Quercus ilex a significant correlation between the pH and the defoliation levels (P&lt;0.01, r = 0.62) was found. This fact reveals the potential usefulness of tree bark as a health bioindicator of trees.</style></abstract></record></records></xml>