Bovine sperm, extracted with 0.1% Triton X-100, frozen at -20 degrees C for 48-120 hours, and thawed, disintegrated by microtubule sliding when 1 mM MgATP was added. Microtubules and outer dense fibers (ODFs) were usually extruded in groups or "bundles". A total of 44.5% of the cells extruded two distinct bundles, one from each side of the connecting piece, exhibiting opposite curvatures. Only ...

The present study investigates the possible removal of Ni2+ ions from aqueous solution by using low-cost Hygrophila auriculata activated nano carbon (HA-ANC) as an adsorbent. had been prepared stem waste well; raw material was carbonized with con. H2SO4 and thermal action. Batch experiments were performed in order to calculate percentage for 90.737% at 60 oC. properties treated untreated are co...

The aim of this study was to determine the in vitro inhibitory effects some metal ions (silver ion (Ag+), cadmium (Cd2+), cobalt (Co2+), copper (Cu2+), nickel (Ni2+), lead (Pb2+) and zinc (Zn2+)) on glutathione reductase (GR) enzyme activities that purified from gill, kidney liver tissues Capoeta umbla. For purpose, C. umbla freshwater fish using ammonium sulfate precipitation affinity column c...

The aim of this research is to study Ni2+ supported on hydroxyapatite-core-shell magnetic γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp-Ni2+) as a green and recyclable catalyst for the Biginelli reaction under solvent-free conditions. One-pot multi-component condensation of 1,3-dicarbonyl compounds, urea and aldehydes at 80 oC affords the corresponding compounds in high yields and in short reaction times ...

Mice immunized intraperitoneally with sheep erythrocytes were treated with nickel chloride, a common particulate air pollutant. Primary antibody production in the spleen was examined using a hemolytic plaque technique. A negative linear dose-response relationship (p is less than 0.05) was observed between the logarithm of (plaques/10(6) cells) and the nickel concentration administered. Mice in...

The electron paramagnetic resonance (EPR) parameters (g factors and the hyperfine structure constants) for Ni2+ and Co+ in MgO are theoretically studied from the perturbation formulas of these parameters for a 3d8 ion in octahedral crystal-fields. In the computations, the ligand orbital and spin-orbit coupling contributions are taken into account using the cluster approach. The calculated EPR p...

background: mushroom tyrosinase a potent candidate in clinical studies known as polyphenol oxidase, is a metaloenzyme from the oxidase superfamily widely distributed from lower to higher life forms. it plays a crucial role in sclerotization of exoskeleton in insects, also responsible for skin pigmentation in mammalians. objective: in this study, after reconstitution of mt by some metal ions, th...

We report the effects of tetracycline analogues on cytosolic Ca2+ transients resulting from application of ionic nickel (Ni2+), a potent surrogate agonist of the osteoclast Ca2+ "receptor". Preincubation with minocycline (1 mg/l) or a chemically modified tetracycline, 4-dedimethyl-aminotetracycline (CMT-1) (1 or 10 mg/l), resulted in a significant attenuation of the magnitude of the cytosolic [...

New TiO2-based hybrid materials composed of an organic polymer, cellulose acetate butyrate and copolymer of acrylonitrile acrylamide (AN + AA) were prepared. The effectiveness of immobilization of microbial strain Arthrobacter oxydans 1388 on the newly synthesized hybrid membranes was investigated by biochemical methods. The obtained results revealed that the matrix more suitable for biofilm fo...