Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 54 for “"Biocides"”.
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A study of triorganotin biocides in antifouling coatings.
… changes undergone by a series of triorganotin biocides when dispersed in an antifouling paint and a polyurethane system. In the antifouling paint, based on the Hypalon polymer, tri-n-butyltin chloride, tri-n-butyltin acetate and to-(triphenyltin) oxide are essentially unmodified. …
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Phytochemistry in the development of pesticides and biocides
To date biopesticides and biocides are studied as substitutes for their toxic synthetic ancestors. The botanical pesticides are evaluated as tools intended for integrated crop protection schemes, while the natural biocides for their potential use in residential areas. In this study we evaluate …
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Controlled release of Isothiazoline biocides from industrial minerals
… morphologies can be used to adsorb isothiazoline biocides for controlled-release and antimicrobial purposes. The absorption of the biocides on the mineral powders was achieved by way of using a bench high shear mill (dry process), or combining them to hydrated minerals (wet process). The …
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The fate of organotin biocides in marine antifouling elastomers.
… changes undergone by a series of triorganotin biocides when dispersed in neoprene-based marine antifouling elastomers. Chemical speciation using tin-119 nuclear magnetic resonance spectroscopy and gas chromatography, indicate that the majority of the tri-n-butyltin (TBT) biocides are converted …
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Studies on the mode of action of the pyrithione biocides
… <i>E. coli</i> and <i>P. aeruginosa</i> to both biocides was shown to increase inhibited substrate metabolism for acetate, thymidine and uracil. ATP metabolism indicated extreme sensitivity to both NaPT and ZnPT in both <i>E. coli</i> and <i>P. aeruginosa</i>. The membrane effect of the …
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Comparison of the biodegradation of pharmaceuticals and biocides in water and soil systems
The fate of organic chemicals in the environment is determined by both abiotic and biological processes and microbial degradation of chemicals is a key parameter for their environmental risk assessment. The majority of chemicals have been tested for ready biodegradability in aqueous systems (e.g. …
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Some Investigation into the Susceptibility and Resistance to Industrial Biocides of Fungi Important in Textile and Polyurethane Biodeterioration
… and a family of new organic industrial biocides is described, with particular reference to the protection of cotton cellulose under conditions of elevated temperature, and the new synthetic polyurethane materials, especially in situations wherethese two types of material may be in close …
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Development of limiting dilution viability pcr method to assess the effectiveness of selected biocides to treat indoor fungi growth
… treated with cost-effective and green methods. Biocides have direct biological effect on living organisms but the evidence on their control of indoor fungal contamination is scarce. Using conventional cultivation to evaluate their effectiveness is time consuming while polymerase chain reaction …
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Antibiotic and biocide resistance in Salmonella enterica and Escherichia coli 0157
Bacterial resistance to antibiotics and biocides is a prevalent problem, which may be exacerbated by the commonplace and often unnecessary inclusion of biocides into domestic products. Addition of antimicrobials, to domestic disinfectants has raised concern about promoting microbial resistance and …
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Understanding Bacterial Resistance and Dissemination: The Impact of Biocide Priming
… use of biocidal products. Uncontrolled use of biocides, especially at sub-inhibitory concentrations has led to growing concerns that their selective pressure may favour the prevalence of less susceptible bacterial strains and encourage the expression and dissemination of antibiotic resistance …
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Control of Biodeterioration of Sandstone on the Fisher Fine Arts Library
… biocolonization through the application of biocides. The presence of biocolonization is not only an aesthetic issue, but one of deterioration, because microorganisms can alter the material both physically and chemically making it more susceptible to other deterioration mechanisms. The study …
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Microbial ecology of freshly sawn yellow-poplar lumber ( Liriodendron tulipifera L.) in two seasons
… practice of treating green lumber with chemical biocides to protect it from discoloration, although successful, is a potential hazard to both the environment and human life. One potential alternative to chemical biocides is biological control. The most recent success in the field of biological …
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Studies of polymers in fouling release coating science
… our studies of the solubility properties of two biocides in F127 aqueous solutions. One is zinc omadine and the other is C9211. The partition coefficients of these two biocides were also determined from the analytical results.</p> <p>In chapter two, we conducted phase related studies of a …
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Studies on T-OMP and the development of antimicrobial tolerance in <i>Pseudomonas aeruginosa</i> PAO1
… the pure active forms of the three isothiazolone biocides 1,2-benzisothiazolone (BIT), MIT, CMIT and the thiol-interactive agent thiomersal (used as a positive control).<br/>An increase was observed in the minimum inhibitory concentrations (MIC) of all four biocides by at least 58% between the …
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Studies on the development of antimicrobial tolerance in monospecies and binary biofilms
… possibility of cross-resistance between these biocides. This was followed by observation of the action of BIT in binary biofilms and subsequent susceptibility of component species this biocide. Monoculture of <i>Ps. aeruginosa</i> PAOl biofilms grown on the Sorbarod filters were passaged in the …
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The Characterisation of Oilfield Chemicals by Electrospray Ionization Multi-Stage Mass Spectrometry (ESI-MSᵑ)
… (corrosion inhibitors, scale inhibitors, biocides and demulsifiers) and in Produced Water.
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The Growth of Streptomycetes and Fungi Under Controlled Conditions on the Surface of Coated Materials
… biodeterioration of materials and evaluation of biocides used to protect them, but is extremely variable. Pure culture techniques were employed to evaluate two factors, moisture availability and the action of Streptomycetes (particularly Streptomyces spp. ), which might lead to variability. …
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Listeria monocytogenes in the mushroom production environment: biofilm formation and control measures
… mushroom industry generally employs the use of biocides that are specifically marketed for disease control within the mushroom production environment, but their efficacy against L. monocytogenes biofilms was unknown. In this work, it was established that mushroom industry isolates of L. …
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Studies on the mechanism of zinc pyrithione resistance in Pseudomonas aeruginosa PAO1
… selected antimicrobial agents (Isothiazolone biocides). These passages in sub-minimal inhibitory concentrations (sub-MIC) of antimicrobial agents also exhibited corresponding shifts in outer membrane protein profiles. The aim of this project was to elucidate whether or not such adaptive …
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Les perturbateurs endocriniens : les défis entourant la réglementation de ces substances chimiques au niveau international, canadien et européen
… its legislation on chemicals, pesticides and biocides. However, in Canada, EDs are not specifically prohibited within chemical or pesticide legislations. Similarly, no binding standards or guidelines are currently in force within the international community. As such, would a specific framework …
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