Search results for "Poultice"

showing 4 items of 4 documents

The application protocol impacts the effectiveness of biocides against lichens

2020

Abstract This work analyzed the influence of different application protocols on the efficacy of two biocides against the foliose lichen Xanthoparmelia tinctina on the sandstones of the Roman Archaeological site of Luni (Italy). The hypotheses that (a) biocide application tools (brush vs. poultice), (b) pre-treatment hydration, and (c) post-treatment washing may affect devitalization success were verified by monitoring chlorophyll a fluorescence of thalli, both in situ and in laboratory conditions. The hypothesis that (d) stone substrate may act as reservoir for later biocide release under repeated cycles of wetting and drying was also assayed. Analyses confirmed the importance of the applic…

0301 basic medicineBiocide030106 microbiologyFoliose lichenLichenBenzalkonium chloride010501 environmental sciences01 natural sciencesMicrobiologyBiomaterials03 medical and health sciencesBenzalkonium chloridechemistry.chemical_compoundAdsorptionChlorophyll a fluorescencemedicineCelluloseThallus hydrationLichenWaste Management and DisposalBenzalkonium chloride Chlorophyll a fluorescence Lichen Thallus hydration Stone conservation0105 earth and related environmental sciencesChemistryBenzalkonium chloride; Chlorophyll a fluorescence; Lichen; Stone conservation; Thallus hydrationPoulticeThallusEnvironmental chemistryStone conservationmedicine.drugInternational Biodeterioration & Biodegradation
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Species- and site-specific efficacy of commercial biocides and application solvents against lichens

2017

Abstract Control of lichens on stone cultural heritage is mostly achieved by a combination of mechanical removal with biocide applications. However, there is a lack of scientific evidence on the efficacy of different biocides on different species, and on the consistency of biocide effects on heritage sites in different environmental conditions. This results in some uncertainty when conservation interventions to control lichens are routinely defined on the basis of restoration tradition or empirical evaluation, without experimental measures of how lichens respond. In this work, we quantitatively evaluated (a) the efficacy of five commercially-available biocides, applied using a brush or with…

0301 basic medicineBiocideBiocide; Chlorophyll a fluorescence; Ergosterol; Lichen; Organic solvents; Microbiology; Biomaterials; Waste Management and DisposalBiocide030106 microbiologyLichenVerrucaria nigrescens010501 environmental sciencesBiologyVitalityProtoparmeliopsis muralis01 natural sciencesMicrobiologyBiomaterials03 medical and health sciencesErgosterolChlorophyll a fluorescenceBotanyLichenWaste Management and Disposal0105 earth and related environmental sciencesBiocide Chlorophyll fluorescence Ergosterol Lichen Organic solventsPoulticeOrganic solventsEnvironmental chemistryChlorophyll fluorescenceBiocide Chlorophyll a fluorescence Ergosterol Lichen Organic solventsInternational Biodeterioration & Biodegradation
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Salt extraction from lime-based mortars: An experimental study using different poultice formulations

2020

Abstract The extractive capability of soluble salts in poultices treatments currently used in mortar conservation (ArbocelTM plus sepiolite; ArbocelTM, sepiolite and sand; Westox-Cocoon®) were tested to evaluate their efficiency and compatibility with specific mortar substrate. The pore size distribution of the experimental mortar substrate and of the blank dried poultices were preliminarily accomplished by mercury intrusion porosimetry (MIP). Desalination tests were carried out on specifically-formulated mortars after capillary absorption of Na2SO4 0.3 M solution. The efficiency of salt extraction was measured by means of electrical conductivity meter and ion chromatography. Among the test…

Materials scienceSepiolite0211 other engineering and technologies020101 civil engineeringSalt extraction performance02 engineering and technologyBuilding and Constructionengineering.materialPoulticeDesalinationElectrical conductivity meter0201 civil engineeringMortarChemical engineering021105 building & constructionengineeringGeneral Materials ScienceBuilt heritage conservationDesalination poulticeMortarPorosityDissolutionSettore GEO/09 -Georis. Miner.e Appl.Mineral.-Petrogr. per l'Ambi.ed i B.Cult.Civil and Structural EngineeringLime
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A comparative study of different formulations of poultices for soluble salts removal from experimental plasters

2017

Soluble salts extractive capability of some commercial materials currently used in plaster restoration sector (ArbocelTM plus sepiolite; ArbocelTM, sepiolite and sand; Westox-Cocoon®) were tested in the present study, with the aim to evaluate their efficiency, their compatibility with the substrates as well as in terms of costs and duration of intervention. The three poultice products were first characterized in terms of porosimetric distribution. The desalination tests have been performed on samples of plaster specially formulated and made at the laboratory. Experimental specimens were then brought into contact with a solution of Na2SO4 0.3 M. The efficiency rating of these different types…

restoration plasters soluble salt removal poultice products extractive capabilitySettore GEO/09 -Georis. Miner.e Appl.Mineral.-Petrogr. per l'Ambi.ed i B.Cult.
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