1,721,209 research outputs found
Pasteurella piscicida: metodo per l'isolamento ed identificazione dalle acque di allevamento
No full textIl petrolio in mare: riflessioni sugli effetti, XIV Rassegna del Mare: "Attività produttive e tutela dell'ambiente marino nel quadro del diritto internazionale comunitario"
No full textThe use of biomarkers in aquatic biomonitoring: the example of esterases
No full text1. The term biomarker refers to the physiological, biochemical. and histological changes used as indicators of exposure to chemical contaminants and/or of its effects at the suborganismal or organismal level. Recently the development of sensitive biochemical markers for monitoring environmental quality in aquatic ecosystems has raised a great deal of interest. 2. Selected biochemical markers measured in feral organisms can provide sensitive indexes, or early warning signals, of potential ecosystem degradation caused by contaminants. Compared with chemical residue analysis, biomarkers have the advantage of measuring the stress on the organism. thus being more biologically relevant. 3. Some of the most frequently used biomarkers in aquatic biomonitoring in different countries are briefly described. 4. The use of cholinesterase activity as a biomarker of pesticide exposure for biomonitoring in estuarine areas is also given as an example. Copyright (C) 2001 John Wiley & Sons, Ltd
Real-time PCR detection of the parasitic ciliate Ichthyophthirius multifiliis in water samples
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Indagine sulla disponibilità dei farmaci in acquacoltura: situazione nazionale, comunitaria ed extracomunitaria
No full textFish pasteurellosis: Sensitivity of Western blotting analysis on the internal organs of experimentally infected sea bass (Dicentrarchus labrax)
No full textIn this study we evaluated the sensitivity of western-blotting in detecting system bacterial infections caused by Photobacterium damsela subsp. piscicida in internal organs of experimentally infected sea bass. Western blotting revealed cross-reactivity in liver homogenate only, but not in spleen and serum
PDMS-based films containing surface-active amphiphilic block copolymers to combat fouling from barnacles B. amphitrite and B. improvisus
Full text linkSurface-active amphiphilic diblock copolymers, Si-EFS14 and Si-EFS71, consisting of a poly(dimethyl siloxane) block (degree of polymerisation 11) and a poly(4-(triethyleneglycol monomethyl ether)-2,3,5,6-tetrafluorostyrene) block (average degree of polymerisation 14 and 71) were synthesised by ATRP. Films were prepared by incorporating each copolymer (4 wt%) into a PDMS matrix, which was then condensation cured. Bioassays were performed on the films using two barnacle species, Balanus amphitrite and Balanus improvisus, at different stages of their life cycles. The cyprids of B. improvisus settled on all test surfaces in higher numbers than those of B. amphitrite. However, the juveniles of B. improvisus were more easily removed from the films containing the copolymer Si-EFS14 than from those containing the copolymer Si-EFS71. An XPS analysis revealed that the near-surface region of copolymer Si-EFS71 was enriched in oxyethylenic chains and became even more populated by these hydrophilic chains after the films were immersed in water
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