Wyniki wyszukiwania

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Organotin compounds in marine sediments

100%

Radke B., Staniszewska M., Wasik A., Namiesnik J., Bolalek J.

Polish Journal of Environmental Studies

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2008

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tom 17

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nr 5

643-654

Organotin compounds are widely used in almost all sectors of industry. Antifouling paints, which were applied to ship hulls to protect from fouling organisms, are the main source of TBT and TPhT derivatives loaded into the sea. The global ban on the use of these compounds in antifouling systems was introduced by the IMO in 2001. However, the ban did not solve the problem of the use of alternatives to TBT in the ship industry. Moreover, the issue of storing the organotins-containing dredged spoils at sea still remains unresolved. The pollution load deposited in port sediments may become an additional threat to the organisms that dwell in a given water basin. In such cases, it is necessary to establish appropriate norms for the quality classification of dredged spoils. Unfortunately, detailed guidelines concerning the disposal of dredged spoils are still lacking.

2

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Butyltins and phenyltins in biota and sediments from the Lagoon of Venice

84%

Bortoli A., Troncon A., Dariol S., Pellizzato F., Pavoni B.

Oceanologia

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2003

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tom 45

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nr 1

Sediments and organisms were sampled to determine organotin contents – butyltins (BTs) and phenyltins (PhTs) – at 12 locations in an estuarine ecosystem, the Lagoon of Venice, characterised by varying contamination impacts. The results showed that organotin contamination in sediments is at lower levels, ranging from 2.5±0.1 to 84±1 ng g−1 (d.w.) for ΣBTs and from 0.8±0.2 to 7±1 ng g−1 (d.w.), for ΣPHTs, than in organisms, where the highest concentrations were found in filter feeders like mussels – from 60±3 to 7632±148 ng g−1 (d.w.) for ΣBTs and from 0.80±0.01 to 4005±121 ng g−1 (d.w.) for ΣPHTs. The possible risk to human health was assessed on the basis of the consumption of edible species sampled in some areas of the lagoon.

3

Organotins used in antifouling paints: environmental impact and contamination in a case study [Southern Venice Lagoon]

84%

Berto D., Boscolo R., Cacciatore F., Giani M.

Oceanological and Hydrobiological Studies

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2006

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tom 35

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nr 3

4

The protective effect of quercetin-5-sulphonic acid on the membrane organotin adsorption

84%

Gabrielska J., Langner M., Przestalski S.

Cellular and Molecular Biology Letters

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1999

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tom 04

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nr 2

5

Estimation of the organotin compounds partition into phosphatidylcholine bilayers with a pH sensitive fluorescence probe

84%

Langner M., Kleszczynska H.

Cellular and Molecular Biology Letters

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1997

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tom 02

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nr 1

The relative partition of trialkyltin and dialkyltin chlorides into the phosphatidylcholine membrane was estimated with a fluorescein dye attached to the phosphatidylethanolamine headgroup (Fluorescein-PE). Changes of pH in the vicinity of the membrane, caused by the adsorption of charged organotin compounds onto the surface, are measured with Fluorescein-PE. Measurements show that dialkyltin and trialkyltin chlorides at low concentrations (below 4 µM) adsorb onto the membrane surface in the charged form and that their relative partition depends on the length of the hydrocarbon residues. Tributyltin chloride was found to be the exception. Its effect on Fluorescein-PE fluorescence in the lipid bilayer was a complex dependence on its concentration in the sample, suggesting conformational changes in the lipid bilayer.

6

The effect of tributyltin on human eosinophylic leukemia EoL-1 cells

67%

Sroka J., Wlosiak P., Wilk A., Antonik J., Czyz J., Madeja Z.

Cellular and Molecular Biology Letters

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2008

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tom 13

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nr 1

67-73

Organotin compounds are chemicals that are widely used in industry and agriculture as plastic stabilizers, catalysts and biocides. Many of them, including tributyltin (TBT), have been detected in human food and, as a consequence, detectable levels have been found in human blood. As organotin compounds were shown to possess immunotoxic activity, we focused our attention on the effect of TBT on the basic determinants of the function of eosinophils, i.e. cell adhesiveness and motility. We used human eosinophylic leukemia EoL-1 cells, a common in vitro cellular model of human eosinophils. Here, we demonstrate that TBT causes a dose-dependent decrease in the viability of EoL-1 cells. When administered at sub-lethal concentrations, TBT significantly decreases the adhesion of EoL-1 cells to human fibroblasts (HSFs) and inhibits their migration on fibroblast surfaces. Since the basic function of eosinophils is to invade inflamed tissues, our results indicate that TBT, and possibly other organotin compounds, may affect major cellular properties involved in the determination of in vivo eosinophil function.

7

Comparison of phytotoxicity of lead and tin organic compounds by means of luminescence methods

67%

Murkowski A., Skorska E.

Acta Agrophysica

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2008

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tom 11

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nr 1[156]

8

The impact of some organotins on the unicellular cyanobacterium Synechocystis aquatilis

67%

Pawlik-Skowronska B., Kaczorowska R., Skowronski T.

Oceanological Studies

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1998

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tom 27

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nr 1

9

The role of pH in the interaction of tin- and leadorganics with model lipid membranes

67%

Sarapuk J., Przestalski S.

Ochrona Środowiska i Zasobów Naturalnych

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1999

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tom 18

Ograniczanie wyników

Organotin compounds in marine sediments

Butyltins and phenyltins in biota and sediments from the Lagoon of Venice

Organotins used in antifouling paints: environmental impact and contamination in a case study [Southern Venice Lagoon]

The protective effect of quercetin-5-sulphonic acid on the membrane organotin adsorption

Estimation of the organotin compounds partition into phosphatidylcholine bilayers with a pH sensitive fluorescence probe

The effect of tributyltin on human eosinophylic leukemia EoL-1 cells

Comparison of phytotoxicity of lead and tin organic compounds by means of luminescence methods

The impact of some organotins on the unicellular cyanobacterium Synechocystis aquatilis

The role of pH in the interaction of tin- and leadorganics with model lipid membranes