M.C. Abreu, B. Alessandro, C. Alexa, R. Arnaldi, M. Atayan, C. Baglin, A. Baldit, M. Bedjidian, S. Beolè, V. Boldea, P. Bordalo , A. Bussière, L. Capelli , L. Casagrande, J. Castor, T. Chambon, B. Chaurand, I. Chevrot, B. Cheynis, E. Chiavassa, C. Cicalò , T. Claudino, M.P. Comets, N. Constans, S. Constantinescu, N. De Marco, A. De Falco, G. Dellacasa , A. Devaux, S. Dita, O. Drapier, L. Ducrou...

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The interaction of ultrathin Pb films with Ru~0001! and Pd~111! has been studied with x-ray photoelectron spectroscopy ~XPS! and thermal desorption spectroscopy ~TDS!. XPS and TDS show that at room temperature Pb grows on Ru~0001! via a Stranski-Krastanov mechanism, i.e., after completion of the first adlayer of Pb on Ru~0001!, further Pb deposition leads to the formation of three-dimensional i...

Lead (Pb) exposure reportedly modulates PKC activity in brain endothelial preparations, which may underlie Pb-induced damage at the blood-brain barrier. Our previous work indicates that Pb accumulates in the choroid plexus and causes dysfunction of this blood-cerebrospinal fluid (CSF) barrier. The present studies were undertaken to test the hypothesis that Pb in the choroid plexus may alter PKC...

The potential for biosolids products to reduce Pb availability in soil was tested on a high Pb urban soil with biosolids from a treatment plant that used different processing technologies. High Fe biosolids compost and high Fe + lime biosolids compost from other treatment plants were also tested. Amendments were added to a Pb-contaminated soil (2000 mg kg(-1) Pb) at 100 g kg(-1) soil and incuba...

Plasma lead (Pb) levels have been measured in normal and lead-intoxicated children, newborns, and children with sickle cell disease. The results in all groups were contant over a wide range of red cell Pb concentration. These results support the thesis that the red cell represents a large repository for Pb, maintaining plasma Pb concentration within closely defined limits, and that methods othe...

Soil pH may influence speciation and extractability of Pb, depending on type of vegetation in urban soil environments. We investigated the relationship between soil pH and Pb extractability at forest and turf grass sites in Baltimore, Maryland. Our two hypotheses were: (1) due to lower pH values in forest soils, more Pb will be in exchangeable forms in forested than in turfgrass soils and (2) d...

To study the effect of organic Se on spatial learning and memory deficits induced by Pb exposure at different developmental stages, and its relationship with alterations of synaptic structural plasticity, postnatal rat pups were randomly divided into five groups: Control; Pb (Weaned pups were exposed to Pb at postnatal day (PND) 21-42); Pb-Se (Weaned pups were exposed to Se at PND 43-63 after P...

Adsorption mechanisms of Pb on montmorillonite were investigated by conducting equilibrium and X-ray absorption fine structure (XAFS) spectroscopy studies. Data from the batch equilibrium studies indicate that Pb could be adsorbing via two mechanisms, depending on ionic strength. At low ionic strength (I = 0.006 M) Pb adsorption is pH-independent: 97% of the available Pb was removed from soluti...

I.BEARDEN, H.BØGGILD, J.BOISSEVAIN, L.CONIN, J.DODD , B.ERAZMUS, S.ESUMI, C.W.FABJAN , D.FERENC, D.E.FIELDS, A.FRANZ , J.J.GAARDHØJE, A.G.HANSEN, O.HANSEN, D.HARDTKE , H. VAN HECKE , E.B.HOLZER , T.J.HUMANIC , P.HUMMEL , B.V.JACAK , R.JAYANTI, K.KAIMI, M.KANETA, T.KOHAMA, M.L.KOPYTINE , M.LELTCHOUK , A.LJUBICIC, JR, B. LÖRSTAD, N.MAEDA, L.MARTIN, A.MEDVEDEV , M.MURRAY, H.OHNISHI, G.PAIC , S.U.P...