using of microorganisms to remove industrial pollutions of environment is an efficient methodthat mimics natural process and decrease remediation cost. in this study, 450 actinomycete strains wereisolated from high metal content soils in iran. heavy metal salt solutions in different concentrations were usedto isolate the resistant strains. 40 resistant actinomycetes which they showed highly res...

Rabbits were exposed to 0.6 mg/m3 of nickel as NiCl2 for about one month. After exposure, alveolar macrophages were lavaged from the lung and divided into three fractions by elutriation. Laminated structures in the macrophages were related to fraction number so that the fractions with the largest cells contained the highest number of structures. The lysozyme activity decreased in unfractionated...

Electron paramagnetic resonance measurements of NiCl2-4SC(NH2)_{2} reveal the low-energy spin dispersion, including a magnetic-field interval in which the two-magnon continuum is within k_{B}T of the ground state, allowing a continuum of excitations over a range of k states, rather than only the k=0 single-magnon excitations. This produces a novel Y shape in the frequency-field EPR spectrum mea...

Fluorinated organic molecules are of interest in fields ranging from medicinal chemistry to polymer science. Herein, we describe a mild, convenient, and versatile method for the synthesis of compounds that bear a perfluoroalkyl group attached to a tertiary carbon, via an alkyl–alkyl crosscoupling. Thus, a nickel catalyst derived from commercially available components (NiCl2·glyme and a pybox li...

We have investigated the interaction of divalent ions with chromatin towards a closer understanding of the role of metal ions in the cell nucleus. The first row transition metal ion chlorides MnCl2, CoCl2, NiCl2 and CuCl2 lead to precipitation of chicken erythrocyte chromatin at a significantly lower concentration than the alkali earth metal chlorides MgCl2, CaCl2 and BaCl2. A similar distincti...

Negative chemotaxis refers to the motion of microorganisms away from regions with high concentrations of chemorepellents. In this study, we set controlled gradients of NiCl2, a chemorepellent, in microchannels to quantify the motion of Escherichia coli over a broad range of concentrations. The experimental technique measured the motion of the bacteria in space and time and further related the m...

A series of air-stable nickel complexes of the form L2Ni(aryl) X (L = monodentate phosphine, X = Cl, Br) and LNi(aryl)X (L = bis-phosphine) have been synthesized and are presented as a library of precatalysts suitable for a wide variety of nickel-catalyzed transformations. These complexes are easily synthesized from low-cost NiCl2·6H2O or NiBr2·3H2O and the desired ligand followed by addition o...