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| 1 | Cerium dioxide as a new reactive sorbent for fast degradation of parathion methyl and some other organophosphates显示文摘Cerium dioxide was used for the first time as reactive sorbent for the degradation of the organophosphate pesticides parathion methyl,chlorpyrifos,dichlofenthion,fenchlorphos,and prothiofos,as well as of some chemical warfare agents—nerve gases soman and O-ethyl S-[2-(diisopropylamino) ethyl] methylphosphonothioate(VX).CeO2 specimens were prepared by calcination of basic cerous carbonate obtained by precipitation from an aqueous solution.The CeO2 samples containing certain amounts(1 wt.%–5 wt.%) of the neighboring lanthanides(La,Pr,Nd) were prepared in a similar way from pure lanthanide salts.It was shown that ceria accelerated markedly the decomposition of parathion methyl causing the cleavage of the P-O-aryl bond in the pesticide molecule.A similar reaction mechanism was proposed for the degradation of other organophosphate pesticides and nerve agents.The degradation times(reaction half-times) were in an order of minutes in the presence of CeO2,compared to hours or days under common environmental conditions.The reaction in suitable organic solvents allowed conversions of about 90% for parathion methyl loading of 20 mg pesticide/g CeO2 within 2 h with a reactant half-life in the order of 0.1 min.The key parameter governing the degradation efficiency of CeO2 was the temperature during calcination.At optimum calcination temperature(about 773.15 K),the produced ceria retained a sufficiently high surface area,and attained an optimum degree of crystallinity(related to a number of crystal defects,and thus potential reactive sites).The presence of other lanthanides somewhat decreased the reaction rate,but this effect was not detrimental and permitted the possible use of chemically impure ceria as a reactive sorbent.A fast organophosphate degradation was demonstrated not only in non-polar solvents(such as heptane),but also in polar aprotic solvents(acetonitrile,acetone) that are miscible with water.This opens new possibilities for designing more versatile decontamination strategies.The cleavage of phosphate ester bonds is of a great importance not only for the degradation of dangerous chemicals(chemical weapons,pesticides),but also for interactions of ceria(especially the nano-sized one) in biologically relevant systems. | Pavel Janos Pavel Kuran Martin Kormunda Vaclav Stengl Tomas Matys Grygar Marek Dosek Martin Stastny Jakub Ederer Vera Pilarova Lubos Vrtoch | 2014 | Journal of Rare Earths2014，32，4： | 4 |
| 2 | PAPNET-direeted resereening of cervicovaginal smears:a study of 101 cases of atypical squamous cells of undetermined significauce显示文摘 | Ryan M R Stastny J F Remmers R | 1996 | Am J Clin Pathol1996，105，6： | 1 |
| 3 | Deletion of the c-kit protooncogene in the human developmental defect piebald trait显示文摘 | Saltman DL Stastny V | 1991 | Proc Natl Acad Sci USA1991，88，10： | 1 |
| 4 | Antibodies against MICA antigens and kidney-transplant rejection显示文摘 | Zou Y Stastny P Siisal C | 2007 | N Engl J Med2007，357，13： | 1 |
| 5 | Antibodies against MICA antigens and kidney-transplant rejection 显示文摘 | Zou Y Stastny P Susal C | 2007 | N Engl J Med2007，357，13： | 1 |
| 6 | Association of the B-cell alloantigen DRw4 with rheumatoid arthritis显示文摘 | Stastny P | 1978 | New Engl J Med1978，298，16： | 1 |
| 7 | Antibodies against MICA antigens and kidney-transplant rejection 显示文摘 | Zou YZ Stastny P Susal C | 2007 | New Engl J Med2007，357，： | 1 |
| 8 | Mixed lymphocyte cultures in rheumatoid arthritis 显示文摘 | Stastny P | 1976 | J Clin Invest1976，57，： | 1 |
| 9 | Glomerulonephritis with Deposition of Australia Antigen Antibody Complexes in Glomerular Basement Membrane显示文摘 | Combes B Stastny P | 1971 | The Lancet1971，2，： | 1 |
| 10 | Synthesis o1 (thia) calyxarene oligomers: Towards calixarene-based den- drimers 显示文摘 | Stastny V Stibor I Dvorakovfi H | 2004 | Tetrahedron2004，60，： | 1 |
| 11 | Nitric oxide synthase inhibition and glutamate binding in quinolinate-lesioned rat hippocampus显示文摘 | LISY V STASTNY F | 2002 | Physiol Res2002，51，3： | 1 |
| 12 | Visfatin and its role in obesity development显示文摘 | Stastny J Bienertova-Vasku J Vasku A | 2012 | Diabetes Metab Syndr2012，6，2： | 1 |
| 13 | Expansion of geographic range in the pine proeessionary moth caused by increased winter temperature显示文摘 | Andrea Battisti Michael Stastny Sigrid Netherer | 2005 | Ecological Applications2005，15，6： | 1 |
| 14 | Glomerulonephritis with deposition of aastrlia antigen-antibody complexes in glomerular basement memberane 显示文摘 | Combes B Stastny P | 1971 | Lancet1971，2，： | 1 |
| 15 | Selective inhibition of vascular endothelial growth factor(VEGF) receptor 2 (KDR/Flt-1)activity by a monoclonal antibody blocks tumor growth in mice 显示文摘 | Brekken R A Overholser J P Stastny V A | 2000 | Cancer Res2000，60，18： | 1 |
| 16 | Selective inhibition of vascula endothelial growth factor (VEGF) receptor 2(KDR/Flk-1)activity by a monoclonal anti-VEGF antibody blocks tumor growth in mice显示文摘 | Brekken RA Overholser JP Stastny VA | 2000 | Cancer Res2000，60，18： | 1 |
| 17 | EEG signal classification: Introduction to the problem显示文摘 | Stastny J Sovka P Stancak A | 2003 | Radio Engineering2003，12，3： | 1 |
| 18 | Antibodies against MICA antigens and kidney-transplant rejection显示文摘 | ZOU Y STASTNY P SUSAL C | 2007 | N Engl J Med2007，357，13： | 1 |
| 19 | Visfatin and its role in o- besity development 显示文摘 | Stastny J Bienertova-Vasku J Vaska A | 2012 | Diabetes Metab Syndr2012，6，2： | 1 |
| 20 | Interrobserver variability in subclassification of squamous intraepithelial lesions: Result of the college of American Pathologists Interlaboratory Comparison Program in Cervicovaginal Cytology 显示文摘 | Woodhouse SL Stastny JF Styer PE | 1999 | Arch Pathol Lab Med1999，123，： | 1 |
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