DSpace UNL

Faculdade de Ciências e Tecnologia (FCT) >
FCT Departamentos >
FCT: Departamento de Conservação e Restauro >
FCT: DCR - Artigos em revista internacional com arbitragem cientifica >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10362/4474

Título: The influence of inherent properties of building limestones on their bioreceptivity to phototrophic microorganisms
Autor: Macedo, Maria Filomena
Miller, Ana Zélia
Dionísio, Amélia
Laiz, Leonila
Saiz-Jimenez, Cesareo
Palavras-chave: Limestone
Petrophysical properties
Chlorophyll a.
Issue Date: 2009
Editora: Springer
Resumo: The influence of open porosity, water absorption capillarity, water vapour permeability, surface roughness, stone pH and chemical composition on stone bioreceptivity to phototrophic microorganisms was assessed by means of a thorough stone characterisation with subsequent artificially inoculation of limestone samples with a multi-species phototrophic culture and placing them inside a growth chamber for 90 days. A principal component analysis and an analysis of variance(ANOVA) were carried out in order to evaluate the direct relationships between stone bioreceptivity and petrophysical properties. From the principal component analysis, two main components were obtained and assigned a petrophysical/photosynthetic biomass meaning. Stone bioreceptivity, quantified by the amount of chlorophyll a and intensity of chlorophyll a fluorescence present on the stone samples after 90 days-incubation, was included in both principal components. The first component was linked to the amount of chlorophyll a and was highly and linearly associated to capillarity and roughness,and less associated with open porosity and water vapour permeability. The second component, linked to the intensity of chlorophyll a fluorescence measured on the stone surfaces, was not linearly associated with the petrophysycal properties,showing the fallibility of this in vivo chlorophyll quantification technique on the estimation of photosynthetic biomass growing on stone materials, particularly when endolithic growth occurs.
Descrição: Annals of Microbiology, 59 (4) 705-713 (2009)
URI: http://hdl.handle.net/10362/4474
ISSN: 1590-4261
Appears in Collections:FCT: DCR - Artigos em revista internacional com arbitragem cientifica

Files in This Item:

File Description SizeFormat
Macedo_2009.pdf926,53 kBAdobe PDFView/Open

Please give feedback about this item
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Universidade Nova de Lisboa  - Feedback
Promotores do RCAAP   Financiadores do RCAAP

Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência PO Sociedade do Conhecimento (POSC) Portal oficial da União Europeia