DSpace UNL

RUN >
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

Title: The influence of inherent properties of building limestones on their bioreceptivity to phototrophic microorganisms
Authors: Macedo, Maria Filomena
Miller, Ana Zélia
Dionísio, Amélia
Laiz, Leonila
Saiz-Jimenez, Cesareo
Keywords: Limestone
Petrophysical properties
Porosity
Permeability
Chlorophyll a.
Issue Date: 2009
Publisher: Springer
Abstract: 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.
Description: Annals of Microbiology, 59 (4) 705-713 (2009)
URI: http://hdl.handle.net/10362/4474
ISSN: 1590-4261
1869-2044
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
Statistics
View Statistics
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

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

 

Universidade Nova de Lisboa  - Statistics  - Feedback
Estamos no RCAAP Governo Português separator Ministério da Educação e Ciência   Fundação para a Ciência e a Tecnologia

Financiado por:

POS_C UE