taknar polymetal (cu-zn-au-ag-pb) deposit: a new type magnetite-rich vms deposit, northeast of iran

S-a studiat experimental îndepărtarea particulelor fine de formazină din apă prin precipitare/coagulare cu complex de polielectrolit şi surfactant şi anume complex poliacrilamidă (produs industrial denumit Praestol 644, obţinut de Degussa) şi laurilsulfat de sodiu (SLS). S-a adăugat oxid de calciu pentru a iniţia precipitarea complexului de polielectrolit împreună cu particulele fine. S-au efec...

Bimetallic Au-based nanoparticles (Au-M where M = Pt, Pd, Cu, Ni), synthesized by simultaneous reduction of the Au salt with noble/non-noble metal salts, exhibit a high activity for the aminoalkene (2,2-diphenylpent-4-en-1-amine) hydroamination affording the 5-membered Markovnikov product. Even though the particle size and morphology of Au-M nanoparticles are comparable to the corresponding mon...

The PHOBOS collaboration has measured transverse momentum distributions of charged hadrons produced in Cu+Cu collisions at √ s NN = 200 and 62.4 GeV. The nuclear modification factor R N part AA is calculated relative to p+p data at both collision energies as a function of collision centrality. For the same number of participating nucleons, R N part AA is essentially the same in both systems ove...

We will review recent results on quantitative description of global properties of bulk partonic matter at RHIC. These results include strangeness phase space factor of the partonic matter, azimuthal angular anisotropy v2, and transverse momentum pT distributions of effective partons at the hadronization of bulk partonic matter. We present empirical constraints on parton energy loss in the high ...

This paper is focused on possible designs and predicted performances of two proposed highenergy, high-luminosity electron-hadron colliders: eRHIC at Brookhaven National Laboratory (BNL, Upton, NY, USA) and LHeC at Organisation Européenne pour la Recherche Nucléaire (CERN, Geneve, Switzerland). The Relativistic Heavy Ion Collider (RHIC, BNL) and the Large Hadron Collider (LHC, CERN) are designed...

An ultrasensitive DNA biosensor has been developed through in-situ labeling of electroactive melamine-Cu(2+) complex (Mel-Cu(2+)) on the end of hairpin-like probe using gold nanoparticles (AuNPs) as the signal amplification platform. The 3'-thiolated hairpin-like probe was first immobilized to the gold electrode surface by the Au-S bond. The AuNPs were then tethered on the free 5'-end of the im...

The regeneration of a reduced form of nicotinamide adenine dinucleotide (NADH) in a batch electrochemical reactor employing Au, Cu and Pt-Au electrodes was investigated. The yield of enzymatically active NADH regenerated was found to depend on the electrolysis potential and the electrode material used. At low negative potentials the yield of active NADH regenerated is similar on both Au and Cu,...