Metabolic Activity of Micromycetes Affecting Urban Concrete Constructions
Concrete resistance to the destructive action of microorganisms is considered as a measure of its durability and is increasingly being raised as an important issue. We focused our study on the biodeterioration of concrete specimens widely used as a building material of urban houses by micromycetes i...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2018/8360287 |
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| author | Galina Yakovleva Eugene Sagadeev Viktor Stroganov Olga Kozlova Rodion Okunev Olga Ilinskaya |
| author_facet | Galina Yakovleva Eugene Sagadeev Viktor Stroganov Olga Kozlova Rodion Okunev Olga Ilinskaya |
| author_sort | Galina Yakovleva |
| collection | DOAJ |
| description | Concrete resistance to the destructive action of microorganisms is considered as a measure of its durability and is increasingly being raised as an important issue. We focused our study on the biodeterioration of concrete specimens widely used as a building material of urban houses by micromycetes isolated from the inner wall surface of the former military hospital in Kazan city, Tatarstan, Russia. Fungal community consists of 9 Penicillium isolates, 6 Aspergillus, 2 Trichoderma, and 1 isolate of Alternaria. First, we have identified two dominant isolates, Aspergillus fumigatus and Penicillium brevicompactum, and characterized their destructive properties according to the radial growth rate, antagonistic activity towards bacterial habitants of concrete, and production of organic acids. Then, we have demonstrated that five tested brands of high-strength concrete differ in bioreceptivity. The alterations in concrete resistances to compression and flexure after fungal attack were recorded at the trend level, mainly due to a short exposure time of concrete to fungal destructors in tests recommended by national Russian standard. Finally, using scanning electron microscopy we have shown that colonization of concrete by the dominant fungi includes their penetration into the thickness of concrete and germination in cracks. Elementary analysis revealed the decrease of calcium content on about 41% after fungal growth on the concrete in liquid phase and on 32% by superficial growth in comparison with the samples without fungal treatment. |
| format | Article |
| id | doaj-art-2da8f7e367c84d4c844dd4b9fcfb45fc |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-2da8f7e367c84d4c844dd4b9fcfb45fc2025-02-03T06:01:48ZengWileyThe Scientific World Journal2356-61401537-744X2018-01-01201810.1155/2018/83602878360287Metabolic Activity of Micromycetes Affecting Urban Concrete ConstructionsGalina Yakovleva0Eugene Sagadeev1Viktor Stroganov2Olga Kozlova3Rodion Okunev4Olga Ilinskaya5Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, Kremlevskaya Str., 18, RussiaKazan State University of Architecture and Engineering, 420043 Kazan, Zelenaya Str., 1, RussiaKazan State University of Architecture and Engineering, 420043 Kazan, Zelenaya Str., 1, RussiaInstitute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, Kremlevskaya Str., 18, RussiaInstitute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, Kremlevskaya Str., 18, RussiaInstitute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, Kremlevskaya Str., 18, RussiaConcrete resistance to the destructive action of microorganisms is considered as a measure of its durability and is increasingly being raised as an important issue. We focused our study on the biodeterioration of concrete specimens widely used as a building material of urban houses by micromycetes isolated from the inner wall surface of the former military hospital in Kazan city, Tatarstan, Russia. Fungal community consists of 9 Penicillium isolates, 6 Aspergillus, 2 Trichoderma, and 1 isolate of Alternaria. First, we have identified two dominant isolates, Aspergillus fumigatus and Penicillium brevicompactum, and characterized their destructive properties according to the radial growth rate, antagonistic activity towards bacterial habitants of concrete, and production of organic acids. Then, we have demonstrated that five tested brands of high-strength concrete differ in bioreceptivity. The alterations in concrete resistances to compression and flexure after fungal attack were recorded at the trend level, mainly due to a short exposure time of concrete to fungal destructors in tests recommended by national Russian standard. Finally, using scanning electron microscopy we have shown that colonization of concrete by the dominant fungi includes their penetration into the thickness of concrete and germination in cracks. Elementary analysis revealed the decrease of calcium content on about 41% after fungal growth on the concrete in liquid phase and on 32% by superficial growth in comparison with the samples without fungal treatment.http://dx.doi.org/10.1155/2018/8360287 |
| spellingShingle | Galina Yakovleva Eugene Sagadeev Viktor Stroganov Olga Kozlova Rodion Okunev Olga Ilinskaya Metabolic Activity of Micromycetes Affecting Urban Concrete Constructions The Scientific World Journal |
| title | Metabolic Activity of Micromycetes Affecting Urban Concrete Constructions |
| title_full | Metabolic Activity of Micromycetes Affecting Urban Concrete Constructions |
| title_fullStr | Metabolic Activity of Micromycetes Affecting Urban Concrete Constructions |
| title_full_unstemmed | Metabolic Activity of Micromycetes Affecting Urban Concrete Constructions |
| title_short | Metabolic Activity of Micromycetes Affecting Urban Concrete Constructions |
| title_sort | metabolic activity of micromycetes affecting urban concrete constructions |
| url | http://dx.doi.org/10.1155/2018/8360287 |
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