منابع مشابه
Biofouling Growth in Cold Estuarine Waters and Evaluation of Some Chitosan and Copper Anti-Fouling Paints
Ecological concerns about antifouling paints containing non-green tin and copper compounds have highlighted the need for environmentally friendly alternatives. We report here a field test conducted in estuarine waters over two months designed to evaluate the efficiency of a number of active natural and man-made chemical ingredients added into a silicon-polyurethane marine paint. Early steps of ...
متن کاملFish farming and anti-fouling paints: a potential source of Cu and Zn in farmed fish
The accumulation of copper and zinc, the basic components of anti-fouling paints, was examined in cultured sea bass Dicentrarchus labrax and sea bream Sparus aurata. Samplings were carried out at 4 eastern Mediterranean fish farms. Two of the farms used nets treated with anti-fouling paints, and 2 used untreated nets. At each farm samples of sediment and fish tissue (muscle, liver and gills) we...
متن کاملControlling Marine Fouling with Antifouling Paints and Underwater Hull Cleaning
trolling marine fouling on ships’ hulls has been considered essential since the earliest days of marine transport. It has been estimated that without any attempt to control fouling, shipping would require 40% more power, equal to about 72 million tonnes of additional fuel per year.1 Therefore, without an effective antifouling system, today’s marine transport industry would undoubtedly grind to ...
متن کاملTribological Systems of Surfaces with Frictional Resistance Reduction
In this paper are assumed micro-ridges and micro-grooves on t he journal and bearing sleeve surfaces. Friction on the boundary layer of the body moving in the oil at high Reynolds numbers may be decreased due to su ch a sculpturing of the surface. The grooved scale of the shark skin is an example of such tribological systems. There size ranges of the grooves are from 200 m to 400 m. The surface...
متن کاملinvestigating the feasibility of a proposed model for geometric design of deployable arch structures
deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...
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ژورنال
عنوان ژورنال: Marine Engineering
سال: 2013
ISSN: 1346-1427,1884-3778
DOI: 10.5988/jime.48.294