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Registros recuperados: 5
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Algae and cyanobacteria on painted surfaces in Southern Brazil Rev. Microbiol.
Gaylarde,Peter M.; Gaylarde,Christine C..
Algae and cyanobacteria disfigure the external surfaces of buildings and may cause their physico-chemical deterioration. Even though the climate in Brazil is humid, there is no published literature on this problem. The objective of this work was to identify the major phototrophs present on Brazilian constructions in residential, urban and rural sites. The algal and cyanobacterial types present on discolored surfaces of painted buildings in nine different municipalities in Brazil, all lying between latitudes 19° South and 30° South, were examined. A total of 816 different organisms was detected in 58 sites. Approximately 63% were single-celled or colonial organisms. The cyanobacterial genus, Synechocystis, was the most biodiverse and frequently comprised...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Algae; Biodeterioration; Brazil; Cyanobacteria; Paint films.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000300005
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An approach to the study of the fungal deterioration of a classical art material: Mastic varnish Electron. J. Biotechnol.
Romero-Noguera,Julio; López-Miras,María del Mar; Martín-Sánchez,Inés; Ramos-López,José Miguel; Bolívar-Galiano,Fernando.
Mastic, one of the best natural varnishes, is frequently used as protective and finishing layer or as component of oleo-resinous media in paintings, both in the past and currently. However, this resin is affected by complex deterioration processes which can change its characteristics and thus the visual aspect of works of art. The alteration processes caused by radiation have been widely studied, but there is a lack of information on the biodeterioration of this natural product. In this paper, fungi from collections as well as from oil paintings of the Fine Arts Museum of Granada (Spain) were inoculated onto slides covered with mastic. The samples, after an incubation period of 15 days, were analysed by gas chromatography-mass spectrometry (GC-MS) to...
Tipo: Journal article Palavras-chave: Biodeterioration; Fungi; GC-MS; Mastic.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000600001
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Biodeterioration patterns found in dammar resin used as art material Electron. J. Biotechnol.
Romero-Noguera,Julio; Martín-Sánchez,Inés; López-Miras,María del Mar; Ramos-López,José Miguel; Bolívar-Galiano,Fernando.
Since the middle of the XIX century, when dammar became popular in Occident, this natural resin is one of the most used in art painting techniques as final protective coating (varnish) as well as a component of pictorial media. The present work is the first approach to the study of the microbiological biodeterioration of this artistic material, which can seriously affect the appearance and integrity of works of art when bad conservation conditions -especially high humidity levels- take place. 12 microorganisms, fungi and bacteria, came from collection and from oil paintings affected by biodeterioration patterns, were inoculated on test specimens prepared with varnish dammar. These were incubated and analyzed by GC-MS to determine both the microbiological...
Tipo: Journal article Palavras-chave: Bacteria; Biodeterioration; Dammar; Fungi; GC-MS.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000300006
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Characterization of Anatomical, Chemical, and Biodegradable Properties of Fibers from Corn, Wheat, and Rice Residues Chilean J. Agric. Res.
Garay M,Rose Marie; Rallo de la B,Mónica; Carmona C,René; Araya C,Jaime.
Anatomical, chemical, and biodegradation properties of fibers from wheat (Triticum aestivum L.), rice (Oryza sativa L.), and corn (Zea mays L.) plant residues and from rice hull were characterized to generate scientific and technical knowledge to support decision making regarding their use. The anatomical and chemical properties were determined following standard procedures. The degree of biodeterioration was analyzed from growth of white rot fungus Pleurotus ostreatus (Jaq.) Quél. in 30 d under favorable conditions. Afterwards, weight loss was evaluated for each residue. Three replicates were used, plus a control of radiata pine (Pinus radiata D. Don) woodchips. The greatest proportion of a-cellulose was found in residues of rice plants (45.1%), with a...
Tipo: Journal article Palavras-chave: Agriculture fibers; Biodeterioration; Crop residues; White rot.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300014
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Influencia de fontes de nitrogenio e aplicacao de calcio na qualidade pos-colheita da uva cv. Italia. Repositório Alice
CHOUDHURY, M. M.; LIMA, M. A. C. de; SOARES, J.M.; FARIA, C. M. B. de..
-°presente estudo foi desenvolvido na Embrapa Semi-Árido, em Petrolina-PE, com o objetivo de avaliar o efeito dé fontes de nitrogênio e aplicações de cálcio sobre a qualidade pós-colheita da uva cv. Itália. °delineamento experimental utilizado foi de blocos ao acaso, com parcelas subdivididas e quatro repetições. As parcelas corresponderam a adubações nitrogenadas: utilizando-se 100% do N na forma de uréia; 70% do N na forma de uréia + 30% na forma de Ca(NO)2; e 35% do N na forma de uréia + 65% na forma de Ca(N03)2' As sub-parcelas compreenderam cachos, previamente marcados, que receberam ou não Ca a 0,04%, via imersão, em cinco aplicações quinzenais, iniciadas aos 59 dias após a poda. Realizaram-se avaliações de coloração do cacho, desidratação dos...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Vitis vinifera; Grape; Variety; Postharvest; Conservation; Biodeterioration; Uva; Armazenamento; Conservação; Podridão; Pós-Colheita; Uva Itália; Grapes; Storage.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/133842
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