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| 1 | Combined Chemical and Mineralogical Evidence for Heavy Metal Binding in Mining- and Smelting-Affected Alluvial Soils显示文摘The binding of metallic contaminants (Pb, Cd, and Zn) and As on soil constituents was studied on four highly con-taminated alluvial soil profiles from the mining/smelting district of Píbram (Czech Republic) using a combination of mineralogical and chemical methods. Sequential extraction analysis (SEA) was supplemented by mineralogical investi-gation of both bulk samples and heavy mineral fractions using X-ray diffraction analysis (XRD) and scanning electron microscopy with an energy dispersive X-ray spectrometer (SEM/EDS). The mineralogy of Fe and Mn oxides was studied by voltammetry of microparticles (VMP) and diffuse reflectance spectrometry (DRS). Zinc and Pb were predominantly bound in the reducible fraction attributed to Fe oxides and Mn oxides (mainly birnessite, Na4Mn14O27·9H2O), which were detected in soils by XRD and SEM/EDS. In contrast, Cd was the most mobile contaminant and was predominantly present in the exchangeable fraction. Arsenic was bound to the residual and reducible fractions (corresponding to Fe oxides or to unidentified Fe-Pb arsenates). SEM/EDS observations indicate the predominant affnity of Pb for Mn oxides, and to a lesser extent, for Fe oxides. Thus, a more suitable SEA procedure should be used for these mining-affected soils to distinguish between the contaminant fraction bound to Mn oxides and Fe oxides. | A. VANEK V. ETTLER T. GRYGAR L. BORUVKA O. EBEK O. DRBEK | 2008 | Pedosphere2008，18，4： | 8 |
| 2 | 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 |
| 3 | A phase I pharmaeoki- netic and biological eorrelative study of IMP321, a novel MHC class II agonist, in patients with advanced renal cell carcinoma显示文摘 | Brignone C Escudier B Grygar C | 2009 | Clin Cancer Res2009，15，19： | 1 |
| 4 | Matrix metalloproteinase MMP-8 and MMP-9 in cerebrospinal fluid during bacterial meningitis :association with bloodbrain barrier damage and neurological sequelae 显示文摘 | Leppert D Leib SL Grygar C | 2000 | Clin Infect Dis2000，31，： | 1 |
| 5 | Ge4 + doped TiO2 forstoichiometric degradation of warfare agents显示文摘 | Stengl V Grygar TM Oplustil F | 2012 | J Hazard Mater2012，，： | 1 |
| 6 | Sol-gel processing and magnetic properties of nickel zincferritethickfilms显示文摘 | Sedlar M Matejec V Grygar T | 2002 | CeramicsInternational2002，2，26： | 1 |
| 7 | Matrix metalloproteinase (MMP)-8 and MMP-9 in cerebrospinal fluid during bacterial meningitis:association with bloodbrain barrier damage and neurological sequelae显示文摘 | Leppert D Leib SL Grygar C | | 0，，： | 1 |
| 8 | Matrix metalloproteinase (MMP)-8 and MMP-9 in cerebrospinal fluid during bacterial meningitis:association with blood-brain barrier damage and neurological sequelae显示文摘 | Leppert D Leib SL Grygar C | 2000 | Clin Infect Dis2000，31，1： | 1 |
| 9 | Matrix metalloproteinase (MMP) 8 and MMP-9 in eerebrospinal fluid during bacterial meningitis: association with blood-brain barrier damage and neurological sequelae 显示文摘 | Leppert D Leib SL Grygar C | 2000 | Clin Infect Dis2000，31，1： | 1 |
| 10 | Reductive dissolution of microparticulate manganese oxides显示文摘 | Snejana Bakardjieva Petr Bezdi?ka Tomá? Grygar Petr Vorm | 2000 | Journal of Solid State Electrochemistry2000，，6： | 1 |
| 11 | Cathodoluminescence of silicified trunks from the Permo-Carboniferous basins in eastern Bohemia,Czech Republic显示文摘 | Matysova P Leichmann J Grygar T | 2008 | European Journal of Mineralogy2008，20，2： | 1 |
| 12 | Matrix metalloproteinases (MMP)-8 and MMP-9 in cerebrospinal fluid during bacterial men- ingitis: association with blood-brain barrier damage and neurologi- cal sequelae显示文摘 | Leppert D Leib SL Grygar C | 2000 | Clin Infect Dis2000，31，1： | 1 |
| 13 | Modified alaminosilicates as low-cost sorbents of As ( Ⅲ ) from anoxic groundwater 显示文摘 | Barbora D Lucie F Grygar T | 2009 | J Hazard Mater2009，165，13： | 1 |
| 14 | Effects of NaCN and ionomycin on neuronal viability and on the abundance of microtubule-associated proteins MAP1,MAP2,and tau in isolated chick cortical neurons显示文摘 | Hutter-Paier B Grygar E Loibner M | 2000 | Cell Tissue Res2000，302，1： | 1 |
| 15 | Paleoenvironmental record in Lake Baikal sediments:Environmental changes in the last 160 ky显示文摘 | Grygar T Kadlec J Pruner P | 2006 | Palaeogeography Palaeoclimatology Palaeoecology2006，237，： | 1 |
| 16 | Thermal behaviour of Ni-Mn layered double hydroxide and characterization of formed oxides显示文摘 | Kovanda Frantisek Grygar Tomas Dornicak Vit | 2003 | Solid State Sciences2003，5，7： | 1 |
| 17 | Two-color, fluorescence-based microplate assay for apoptosis detection 显示文摘 | WRONSKI R GOLOB N GRYGAR E | 2002 | Biotechniques2002，32，3： | 1 |
| 18 | Matrix metalloproteinase (MMP)-8 and MMP-9 in cerebrospinal fluid during bacterial meningitis:association with blood brain barrier damage and neurological sequelae显示文摘 | LEPPERT D LEIB SL GRYGAR C | 2000 | Clin lnfect Dis2000，31，： | 1 |
| 19 | Death of cultured telenceephalon neurons induced by glutamate is reduced by the peptide derivative Cerebrolysin显示文摘 | Hutter-Paier B Grygar E Windisch M | 1996 | J Neural Transm1996，47，： | 1 |
| 20 | Thermal behaviour of Ni-Mn layered double hydroxide and characterization of formed oxides显示文摘 | Kovanda F Grygar T Dornicak V | 2003 | Solid State Sciences2003，5，7： | 1 |
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