The effects of lead, iron, copper, and zinc ions on 8-aminolevulinic acid dehydratase from red blood cell haemolysates in humans, both in the absence and presence of plasma proteins, have been investigated. 8-aminolevulinic acid dehydratase (ALAD) was not found to be a specific indicator of blood lead concentrations since it was also inhibited by copper and activated by zinc. Plasma protein pro...

Detecting is the most important section in all kinds of sensors. In this regard, the amplification of surface plasmon resonance intensity of gold colloids nanoparticles (GNPs) was studied in the presence of several ions. GNPs were synthesized and then capped by thiocyanate and characterized via DLS and TEM image. In the next step the effect of different concentrations of ions such as iron, copp...

We investigate a scenario where conditions for Mott dissociation of charmonium are fulfilled locally in ultrarelativistic heavy ion collisions at the short time scales before hadronization and study possible consequences to be drawn from observation of “anomalous” thresholds in the J/ψ suppression pattern. We suggest that for a compilation of experiments with different kinematics, variables pre...

— The PREX experiment at Jefferson Lab has measured the parityviolating electroweak asymmetry in the elastic scattering of polarized electrons from Pb at an energy of 1.06 GeV and a scattering angle of 5◦. Since the Z0 boson couples mainly to neutrons, this asymmetry provides a clean measurement of the neutron RMS radius Rn of the lead nucleus. In addition to being a fundamental test of nuclear...

The theory of direct electron-positron pair production in the collision of heavy ions i s formulated in the framework of the quasimolecular model. The pair production process acquires a collective nature for (Z1 +Z,)cu; 1 and can be understood a s the shakeoff of the strong vacuum polarization cloud formed in the quasimolecule. The total Cross section is, e .g., 76 l b for Pb + Pb at Coulomb ba...

The discharge of lead containing effluents into the environment and water bodies is harmful for the human, animals, aquatic flora and fauna. Herein, a novel surface engineered magnetic nanoparticle for removing Pb2+  ions was studied. After surface modification of the magnetite by 3-amino-propyltriethoxysilane (APTES) magnetic nanoparticles with covalently linked porphyrins were synthesize...

Intensification of industrial activity, environment stress contributes to the significant rise heavy metal pollution in water resources. Pollution due malignant metals such as lead, chromium, arsenic etc., has been tremendously focused on communal health. Lead pollution-potable finds great threat by different sources like plating units, lead pipes Newspaper is a cellulosic materials, containing...

Initial states of high energy heavy ion collisions are studied using a dipole model through the DIPSY event generator that dynamically includes saturation together with the fluctuations and correlations of the BFKL cascade. The eccentricities ε1,2,3,4 are calculated at RHIC and LHC. Predictions are made for correlations and fluctuations in rapidity of the eccentricities, and conventional theore...

Results of a systematic study of fully integrated particle multi-plicities in central Au–Au and Pb–Pb collisions at beam momenta of 1.7A GeV, 11.6A GeV (Au–Au) and 158A GeV (Pb–Pb) using a statistical-thermal model are presented. The close similarity of the colliding systems makes it possible to study heavy ion collisions under definite initial conditions over a range of centre-of-mass energies...

ALICE, the experiment dedicated to the study of heavy ion collisions at the LHC, uses an object-oriented framework for simulation, reconstruction and analysis (AliRoot) based on ROOT. Here, we describe the general ALICE simulation strategy and those components of the framework related to simulation. Two main requirements have driven the development of the simulation components. First, the possi...