In this research new adsorbents were prepared by modification of surfactant-coated g-alumina with three ligands; 1-(2-pyridylazo)-2-naphtol (PAN), dithizone (HDZ) and dimetyl golyoxime (DMG). The adsorbents were used for removal and pre-concentration of Pb+2, Cd+2, Ni+2, Cu+2, Co+2. Aqueous solutions of the me...

in this research new adsorbents were prepared by modification of surfactant-coated g-alumina with three ligands; 1-(2-pyridylazo)-2-naphtol (pan), dithizone (hdz) and dimetyl golyoxime (dmg). the adsorbents were used for removal and pre-concentration of pb+2, cd+2, ni+2, cu+2, co+2. aqueous solutions of the metal ions were passed through a column filled with the adsorbent and the retained catio...

The binding of killer cell Ig-like Receptors (KIR) to their Class I MHC ligands was shown previously to be characterized by extremely rapid association and dissociation rate constants. During experiments to investigate the biochemistry of receptor-ligand binding in more detail, the kinetic parameters of the interaction were observed to alter dramatically in the presence of Zn(2+) but not other ...

The effects of monoclonal antibodies (mAbs) to cell-surface molecules, divalent cations, and various cell-signaling and metabolic inhibitors on the binding of thymocytes to rat thymic dendritic cells (TDC) were studied using a rosette assay. It was found that TDC/thymocyte adhesion was stronger and faster at 37 degrees C than at 4 degrees C. Flow cytometric analysis demonstrated that bound thym...

Here, we describe the 1.6-A X-ray structure of the DDD (Dickerson-Drew dodecamer), which has been covalently modified by the tethering of four cationic charges. This modified version of the DDD, called here the DDD(4+), is composed of [d(CGCGAAXXCGCG)](2), where X is effectively a thymine residue linked at the 5 position to an n-propyl-amine. The structure was determined from crystals soaked wi...

A two-step protocol (nano-filtration and reverse osmosis) was applied for natural organic matter (NOM) preconcentration of a seawater sample. Complexing affinities of the so concentrated marine dissolved NOM (DNOM) towards major and trace cations were studied by potentiometric and voltammetric titration techniques. The potentiometric titration experiments fitted by models describing and charact...

Soil acidity is major yield-limiting factors for crop production in the highlands areas with heavy rainfall. affects growth of crops due to high concentration toxic acidic cations plant. Field experiments was conducted under permanent plots study influence splits application recommended lime rate on yield and attributes wheat soils during three main cropping seasons.

By URSULA MULLER-EBERHARD, MARION E. ERLAXDSON, H. EARL GINN AND CARL H. SMITH T HALASSEMIA MAJOR is one of the conditions in which severe secondary hemochromatosis occurs as a principal complication. This type of hemochromatosis is manifest at an earlier age than is primary hemochromatosis. In addition to parenteral administration of iron in the form of frequent blood transfusions, increased i...

The electron impact-induced fragmentation of 2,2-dimethyland 2-ethyI-l,findandione, 1 and 2, and their isomers, 3-isopropylideneand 3-propylidenephthalide, 3 and 4, respectively, was studied in detail by mass-analysed ion kinetic energy (MIKE) and collision-induced dissociation (CID-MIKE) spectrometry, including 'H and I3Clabelled analogues of 1 and 2. In all regimes of internal energy, the mol...