74 research outputs found
Study of the Regeneration Cleaning of Used Mineral Oils – Ecotoxicological Properties and Biodegradation
The aim of the study was to establish and compare the model of the biodegradability and ecotoxicological properties of oil samples in aqueous environment.The unused new mineral oil Turbinol and used (after 1 year of usage) recovered oil Turbinol purified by the electrostatical method were the tested samples. For the determination of the ecotoxicological properties, the test organisms used were seeds of Sinapis alba L. and the small aquatic crustaceans Daphnia magna. Preliminary tests were positive and determined the acute toxicity with the values of IC50 and EC50. Biodegradability was determined
by the manometric method, in tests which lasted 28 days. Tests of toxicity were positive, and the samples were found to be hard to biodegrade. Determination of the oil composition by gas chromatography with mass detection (GC – MS); found that the
composition of the electrostatically cleaned oil is comparable to the new oil, which is confirmed by the results obtained with the response inhibition in selected tests. Regeneration extends the oil life, reducing the cost of disposal of waste oils, saving fossil raw materials, thus belonging to the environmentally friendly techniques.
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Geostatistical Microscale Study of Magnetic Susceptibility in Soil Profile and Magnetic Indicators of Potential Soil Pollution
Evaluation of Potentially Drug-Related Patient-Reported Common Symptoms Assessed During Clinical Medication Reviews: A Cross-Sectional Observational Study
Drug - related emergency department visits by elderly patients presenting with non-specific complaints
Assessment of ecotoxicological properties of oils in water
The paper deals with the influence of oils on surface water pollution. Two mineral oils of petroleum
origin, one synthetic oil and one vegetable oil were tested. Properties of the selected oil types were assessed by
ecotoxicological tests. The acute toxicity test on Daphnia magna showed that out of the tested oils the most toxic
for these aquatic organisms were the petroleum oils. In the phytotoxicity test on Sinapis alba, the toxic effect of
mineral oils in comparison with synthetic and vegetable oil was more significant. Oils create oil stains visible
under the microscope. It was difficult to differentiate them from Scenedesmus subspicatus. The calculation of
growth rate was not relevant and a significant loss of cells was detected. It follows from the summary of the tests
results that vegetable oil is the least aggressive for the aquatic environment and there are no significant differences
between synthetic and mineral oils
Hyperlipoproteinemia Impairs Endothelium-Dependent Vasodilation
Summary Atherogenic lipoproteins can cause endothelial dysfunction in the initial stage of atherogenesis. In our study we examined 134 patients with defined hyperlipoproteinemia (non-HDL cholesterol > 4.1 mmol/l or triglycerides > 2.5 mmol/l or taking any of lipid lowering drugs) -94 men and 40 women. The subgroup of controls of comparable age contained 54 normolipidemic individuals -30 men and 24 women. Patients with hyperlipoproteinemia revealed significantly lower ability of endothelium-dependent flow-mediated vasodilation (EDV) measured on brachial artery (4.13±3.07 vs. 5.41±3.82 %; p=0.032) and higher carotid intima media thickness than normolipidemic controls (0.68±0.22 vs. 0.58±0.15 mm; p=0.005). In regression analysis, EDV correlated significantly with plasma concentrations of oxLDL (p<0.05) HDL-cholesterol (p<0.05), Apo A1 (p<0.05), ATI (p<0.01) and non-HDL cholesterol (p<0.05). Patients with hyperlipoproteinemia showed higher plasma levels of oxLDL (65.77±9.54 vs. 56.49±7.80 U/l; p=0.015), malondialdehyde (0.89±0.09 vs. 0.73±0.08 µmol/l; p=0.010) and nitrites/nitrates (20.42±4.88 vs. 16.37±4.44 µmol/l; p=0.018) indicating possible higher long-term oxidative stress in these patients
Killing two birds with one stone: response to pembrolizumab in a patient with metastatic melanoma and B-cell chronic lymphocytic leukaemia
C156 Dendritic cell-based immunotherapy in patients with rising PSA after radical prostatectomy or salvage radiotherapy (phase I/II clinical trials)
Phosphorylated neurofilament heavy subunits as a marker of neurodegeneration in demyelinating diseases of the CNS
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