BaBiOa is the parent compound of the new class of high Tc superconductors that contain no copper. By partially replacing Ba with K (or Bi with Pb) B a!_xK xBi0 3 becomes superconducting in a small range of x. The undoped material is a semiconductor in which the perovskite structure is unstable with re­ spect to a breathing-like distortion (Fig. 1) of the oxy­ gen octahedron (Bi disproportionate...

Heavy-ion collisions will enter a new era with the start of the CERN Large Hadron Collider (LHC). A first short run with proton-proton collisions at the injection energy of 0.9 TeV will be followed by a longer one with pp collisions at 10 TeV. First Pb-Pb collisions at √ sNN=5.5 TeV will take place in 2009. Three experiments (ALICE, ATLAS, and CMS) will study both pp and Pb-Pb collisions. A sel...

the abilities of aspergillus niger and serpula himantioides to immobilize lead (pb) from lead sulphide (pbs) were investigated. upon growth on potato dextrose agar (pda) amended with pbs which contained 10mm pb, no visible solubilization activity was detected. a. niger produced biomass in greater quantity compared to s. himantiodes in both experimental and control media. with a ratio of 1.13, a...

INTRODUCTION AND OBJECTIVE Environmental lead (Pb) is a serious public health problem. At high levels, Pb is devastating to almost all organs. On the other hand, it is difficult to determine a safe level of exposure to Pb. More than 90% of the Pb in the adult human body and 70% in a child's body is stored in the bones. In the presented study, the effects of lead exposure on bones were studied f...

Lead contamination at shooting range soils is of great environmental concern. This study focused on weathering of lead bullets and its effect on the environment at five outdoor shooting ranges in Florida, USA. Soil, plant, and water samples were collected from the ranges and analyzed for total Pb and/or toxicity characteristic leaching procedure (TCLP) Pb. Selected bullet and berm soil samples ...

A new 3D lead borate Pb(6)B(6)O(14)(OH)(2)(H(2)O), built by different cluster building units of B(6)O(14)(OH) {B(6)} and Pb(6)O(5)(OH) {Pb(6)}, has been obtained under mild hydrothermal conditions. Each {B(6)} cluster is linked with seven {Pb(6)} clusters and vice versa that give rise to the first 7-connected lead borate network.

This article presents evidence demonstrating that the historical use of leaded gasoline and lead (Pb) in exterior paints in Australia has contaminated urban soils in the older inner suburbs of large cities such as Sydney and Melbourne. While significant attention has been focused on Pb poisoning in mining and smelting towns in Australia, relatively little research has focused on exposure to Pb ...

An outlook of the experiments needs for Heavy Ion physics for the next ten years is given, including a summary of required beam types and configurations (e.g. p-Pb and collision energies other than the nominal 13 TeV). We discuss which, if any, other ion species than Pb are being considered. The experiment expectations in terms of integrated luminosities are discussed, along with the impact use...

ALICE is a general-purpose heavy-ion experiment able to identify particles over a wide momentum range thanks to excellent vertexing and tracking performance, low material budget and different Particle IDentification (PID) techniques. In this paper the measurement of the production of identified light flavour particles in pp, p–Pb and Pb–Pb collisions is reported. It is of fundamental importance...

In order to find bamboo leaves with high contents of bioactive polysaccharides, 32 samples were chosen to analyze their polysaccharide content by GC and sulfuric acid-anthrone colorimetric assays. Purified polysaccharides (BLPS) were separated from the four varieties P. nigra (Lodd.) Munro (PN), P. vivax McClure (PV), Chimonobambusa quadrangularis (Fenzi) Makino (CQ), and P. bambussoides cv. Ta...