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Etude de la qualité de l'air en Lorraine-Nord par les lichens contribution en tant que bioindicateurs écologiques, bioaccumulateurs d'éléments chimiques et biomarqueurs du stress oxydant /Signoret, Jonathan. Müller, Serge. January 2008 (has links) (PDF)
Reproduction de : Thèse doctorat : Sciences de la vie : Metz : 2002. / Titre provenant de l'écran-titre. Notes bibliographiques.
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Lichens as biomonitors for manganese and lead in Pretoria, South AfricaForbes, PBC, Thanjekwayo, M, Okokwo, JO, Sekhula, M, Zvinowanda, C 25 August 2008 (has links)
Abstract
Parmotrema austrosinense (Zahlbr.) Hale lichens were
collected from the Pretoria central business district (CBD),
as well as three sites to the east of Pretoria; the National
Botanical Gardens, the CSIR campus and the suburb of
Lynnwood, with the aim of utilising these lichens as biomonitors
of air quality to determine the effects of the phasing
out of leaded petrol and the simultaneous introduction
of manganese anti-knock additives to fuel in South Africa.
In addition to lichens, roadside dust and soil samples were
collected from the CBD and CSIR campus, and all samples
were analysed by flame atomic absorption spectrometry after
acid digestion. There was no significant difference (95 %
confidence) between the Mn content of lichens from all
sampling sites (overall average of 97.1 ± 39.1 μg.g-1, n=
28), which was most likely due to an even suspension of
Mn-containing particles arising from soil dust. Additional
contributions to Mn loading as a result of vehicle emissions
were currently not evident. For all non-CBD sites, higher
Pb levels were found in lichens which were nearer to busy
roads, suggesting an historical impact by vehicular emissions
of Pb arising from leaded petrol usage. The Pb concentrations
in lichens found in the CBD (average of 181.1
± 98.0 μg.g-1, n=10) were significantly higher (95 % confidence
limits) than those of lichens growing outside of the
CBD area (average of 41.5 ± 36.4 μg.g-1, n=18), and the Pb
levels were higher than those of Mn, which was contrary
to that found in sites outside the CBD.
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A chemical investigation of teloschistes flavicansBalthis, Vernon Mountcastle 05 1900 (has links)
No description available.
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Environmental factors affecting net CO2 assimilation in Cladonia alpestris (L.) Rabh. in the subarcticCarstairs, Anne Graham. January 1976 (has links)
No description available.
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Salt tolerances in Cladophora (chlorophyceae) : A study of populations and speciesThomas, D. N. January 1987 (has links)
No description available.
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Ecology of soil-surface lichens in arid south-eastern AustraliaRogers, Roderick W. January 1970 (has links)
237 leaves : ill. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Botany, 1971
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Allelopathic effects of bark phenols on epiphytic lichens /Koopmann, Ricarda. Unknown Date (has links)
Thesis (doctoral)--Universität Bonn, 2005. / Downloaded and printed Sept. 10, 2008. Includes bibliographical references (leaves 52-60). Also available via the internet.
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Distribution of chemistry and sexual fecundity in the lichenized-fungi, Xanthoparmelia cumberlandia and Xanthoparmelia coloradon︠sis on Boulder Mountain, Aquarius Plateau, UT /Jackson, Heather Bird, January 2004 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Integrative Biology, 2004. / Includes bibliographical references.
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Bryophyte and lichen vegetation of rock outcrops in the driftless area of WisconsinFoote, Kenneth Gerald, January 1963 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1963. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 133-139).
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The corticolous lichen and bryophyte communities of the upland conifer-hardwood forests of northern WisconsinCulberson, William Louis. January 1954 (has links)
Thesis (Ph. D.)--University of Wisconsin, 1954. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 168-170).
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