Mikhail L. KOPYTINE ∗ for The NA44 Collaboration 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.Me...

The two-proton correlation function at midrapidity from Pb+Pb central collisions at 158 AGeV has been measured by the NA49 experiment. The preliminary results are compared to model predictions from proton source distributions of static thermal Gaussian sources and the transport models of rqmd and venus. We obtain an effective proton source size σeff = 4.0 ± 0.15(stat.) +0.06 −0.18 (syst.) fm. T...

The solid-liquid interface reaction between phosphate rock (PR) and metals (Pb, Cu, and Zn) was studied. Phosphate rock has the highest affinity for Pb, followed by Cu and Zn, with sorption capacities of 138, 114, and 83.2 mmol/kg PR, respectively. In the Pb-Cu-Zn ternary system, competitive metal sorption occurred with sorption capacity reduction of 15.2%, 48.3%, and 75.6% for Pb, Cu, and Zn, ...

It is generally acknowledged that Pb(2+), which is sequestered by live cells from their direct environment, affects a large number of cellular processes at picomolar to micromolar concentrations. However, resolving the specific molecular targets and mechanisms responsible for the neurotoxic effects of this xenobiotic metal is hampered by the lack of suitable tools to investigate the intracellul...

The present study examines the influence of Ca2+ as (CaSO4), dissolved organic carbon (DOC) and pH on chronic water-borne lead (Pb) toxicity to the larval fathead minnow (Pimephales promelas) under flow-through conditions. The 30 day LC50 for low hardness basic test water (19 mg CaCO3 L(-1)) was 39 (range: 27-51) microg dissolved Pb L(-1) and was greatly increased by increasing concentrations o...

Lead (Pb) is recognized as one of the most pervasive environmental health concerns in the industrialized world. While there has been a substantial reduction in the use of Pb in gasoline, water pipes, and Pb-based residential paint, residual Pb from their use is still in the environment and constitutes an important source of Pb in the atmosphere, water, and soil. Soil acts as a sink for these an...

Surroundings of the Legnica Cu smelter (Poland) offer insight into the behavior of Pb and other metal(oid)s in heavily contaminated soils in a relatively simple site, where lithogenic and anthropogenic Pb contributions have uniform Pb isotope composition over the time of smelter activity. Distribution of metal(oid)s decreases asymptotically with depth and below 30 cm reaches concentrations typi...

Introduction: The U-Pb isotope system provides unparalleled chronological resolution in the determination of absolute ages of events occurring in early solar system history. Proper comparison of these absolute ages with the relative chronologies emerging from studies of now-extinct nuclides such as Al, Mn, and Hf requires identification of fixed time points in the evolution of materials in the ...

Lead (Pb) poisoning causes permanent neurologic and developmental disorders and remains an important environmental health problem for US children, despite removal of Pb from gasoline and household paints. To better understand the contribution of Pb from historical traffic and residential Pb based paint to soil Pb concentrations in Los Angeles, we analyzed 550 soil Pb samples from south central ...

We used a combination of in situ attenuated total reflectance Fourier transform infrared (ATRFTIR) spectroscopy and X-ray absorption fine structure (XAFS) spectroscopy to conduct molecular scale studies on Pb(II)-sulfate interactions at the solid-water interface of goethite at pH 4.5, 5.0, and 6.0. Both the ATR-FTIR studies (probing sorbed SO4 in a flow cell setup as a function of the Pb concen...