| | 1 | Author
| M. Suwalsky, M. A. Espinoza, M. Bagnara, C. P. Sotomayor | Requires cookie* | | | Title
| X-Ray and Fluorescence Studies on Phospholipid Bilayers. IX. Interactions with Pentachlorophenol  | | | | Abstract
| Pentachlorophenol (PCP) is a widely used and highly toxic fungicide. Its toxicity is mainly expressed at the cell membrane level. It is, therefore, o f interest to test its ability to alter the lipid bilayer organization. The present study was performed by X-ray diffraction techniques on dimyristoylphosphatidylethanolam ine (D M PE) and dim yristoylphosphatidylcholine (D M P C) bilayers and by fluorescence on DM PC liposomes. These two phospholipids are re spectively found at the inner and outer monolayers o f human erythrocyte membranes. Each type o f phospholipid was made to interact with different concentrations o f the sodium form o f PCP in absence and in presence o f water. It was found that PCP significatively affected the structure o f both phospholipids, being the damage much higher in DM PC bilayers. | | | |
Reference
| Z. Naturforsch. 45c, 265 (1990); received September 18 1989 | | | |
Published
| 1990 | | | |
Keywords
| X -R ay Diffraction, Fluorescence, Phospholipid Bilayers, Pentachlorophenol, Toxicity | | | |
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| default:Reihe_C/45/ZNC-1990-45c-0265.pdf | | | | Identifier
| ZNC-1990-45c-0265 | | | | Volume
| 45 | |
| 2 | Author
| K. Nut, Porem Ba, Wilfried Gunkel, Siegmund Lang, Fritz Wagner | Requires cookie* | | | Title
| Marine Biosurfactants, III. Toxicity Testing with Marine Microorganisms and Comparison with Synthetic Surfactants | | | | Abstract
| Eight synthetic and nine biogenetic surfactants were tested on their toxicity. Because o f their possible application as oil dispersants against oil slicks on sea. the test organisms used were marine microorganisms (mixed and pure cultures o f bacteria, microalgae, and protozoa). Bac terial growth was hardly effected or stimulated, whilst that o f algae and flagellates was re duced. All substances tested were biodegradaded in sea water. The bioluminescence o f Photo-bacter phosphoreum (M icrotox test) was the most sensitive test system used. A ranking shows that most biogenetic surfactants were less toxic than synthetic surfactants. N o toxicity could be detected with the glucose-lipid GL. produced by the marine bacterium Alcaligenes sp. MM 1. | | | |
Reference
| Z. Naturforsch. 46c, 210 (1991); received October 9 1990 | | | |
Published
| 1991 | | | |
Keywords
| Surfactants Biosurfactants, Marine Microorganisms, Toxicity, M icrotox | | | |
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| default:Reihe_C/46/ZNC-1991-46c-0210.pdf | | | | Identifier
| ZNC-1991-46c-0210 | | | | Volume
| 46 | |
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