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Affinity states of biocides determine bioavailability and release rates in marine paints
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Division of Pharmacognosy.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Division of Pharmacognosy.
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2015 (English)In: Biofouling (Print), ISSN 0892-7014, E-ISSN 1029-2454, Vol. 31, no 2, 201-210 p.Article in journal (Refereed) Published
Abstract [en]

A challenge for the next generation marine antifouling (AF) paints is to deliver minimum amounts of biocides to the environment. The candidate AF compound medetomidine is here shown to be released at very low concentrations, ie ng ml(-1) day(-1). Moreover, the release rate of medetomidine differs substantially depending on the formulation of the paint, while inhibition of barnacle settlement is independent of release to the ambient water, ie the paint with the lowest release rate was the most effective in impeding barnacle colonisation. This highlights the critical role of chemical interactions between biocide, paint carrier and the solid/aqueous interface for release rate and AF performance. The results are discussed in the light of differential affinity states of the biocide, predicting AF activity in terms of a high surface affinity and preserved bioavailability. This may offer a general framework for the design of low-release paint systems using biocides for protection against biofouling on marine surfaces.

Place, publisher, year, edition, pages
2015. Vol. 31, no 2, 201-210 p.
Keyword [en]
antifouling biocides, release, surface adsorption, barnacle, RP-HPLC, ellipsometry
National Category
Microbiology in the medical area Medicinal Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-253882DOI: 10.1080/08927014.2015.1012639ISI: 000353565900007PubMedID: 25775096OAI: oai:DiVA.org:uu-253882DiVA: diva2:816425
Funder
Carl Tryggers foundation
Available from: 2015-06-03 Created: 2015-06-03 Last updated: 2017-12-04Bibliographically approved

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Göransson, Ulf

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