In the title coordination polymer, [Zn(C(8)H(4)O(4))(C(5)H(5)N)(2)](n), the Zn(II) atom, located on a twofold rotation axis, is tetra-coordinated by two monodentate O atoms from two different carboxyl-ate groups and two pyridyl N atoms, forming a distorted tetra-hedral geometry. The Zn(II) atoms are bridged by terephthalate ligands, generating an infinite zigzag chain along [101].

In the title coordination polymer, [Zn(C(14)H(11)NO(3))(C(2)H(6)OS)](n), each Zn(II) ion is five-coordinated in a slightly distorted trigonal-bipyramidal coordination environment, formed by three O atoms from two 2-[(2-oxido-1-naphth-yl)-methyl-eneamino]propanoate ligands, one O atom from a dimethyl sulfoxide mol-ecule and the N atom from the amino-propanoate ligand. The propanoate ligands brid...

The Schiff base, 3-hydroxy-4-{[4-(methylsulfanyl)phenyl]imino}-3,4-dihydronaphthalen-1(2H)-one, and its Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Pd(II) complexes have been synthesized and characterized by microanalysis, conductance, (1)H NMR, infrared and electronic spectral measurements. The ligand exists in the ketoimine form in chloroform, and in the enolimine form in the solid state, as s...

Pyruvic oxime dioxygenase (POD), a key enzyme in heterotrophic nitrification, was purified from Alcaligenes faecalis, and the molecular and catalytic characteristics were reexamined. POD was purified as the homotetramer of the subunit whose molecular weight was 30,000. The deduced amino acid sequence of POD was homologous with a class II aldolase that has been regarded as the Zn(II)-dependent e...

In the title dinuclear complex, [Zn(2)I(4)(C(6)H(8)N(6))(2)], two Zn(II )atoms are bridged by two 1,2-bis-(1,2,4-triazol-4-yl)ethane (btre) ligands, forming a centrosymmetric metallacycle. The coordination geometry of the Zn(II) ion is distorted tetra-hedral with the coordination sphere formed by two N atoms from the triazole rings of two symmetry-related btre ligands and two iodide ligands.

To obtain rich in organic forms of zinc extracts of Lentinus edodes, possessing putative higher immunostimulating properties than actually used, mycelia were cultivated in zinc(II) enriched media. Culture media were enriched in zinc in concentration ranging from 0 to 90 microg mL(-1), added to the medium before inoculation. Total zinc concentration in submerged cultivated mycelial biomass has b...

To achieve cellular iron deprivation by chelation, it is important to develop chelators with selective metal-binding properties. Selectivity for iron has long been the province of certain oxygen-donor chelators such as desferrioxamine, which target Fe(III) and exploit the strength of a relatively ionic Fe(III)-O interaction. We have been studying novel chelators that possess mechanisms to selec...

The extraction of Cu(II), Ni(II), Co(II), Cd(II), Zn(II), Pb(II) and Mn(II) with potassium-dihydro-bispyrazolyl-borate (H(2)BPz(2)(-)) in dichloromethane has been studied. Extraction constants (logK(ex)) have been calculated for all metal systems and were compared with those obtained with dibenzoylmethane (DBM), thenoyltrifluoroacetone (HTTA) and 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (HPMBP)...

In the title compound, [Zn(2)I(4)(C(4)H(8)N(4))(2)], the Zn(II) atom is coordinated in a distorted tetra-hedral geometry by two N atoms from the triazole rings of two 4-amino-3,5-dimethyl-4H-1,2,4-triazole (admt) ligands and two iodide ligands. Doubly bridging admt ligands connect two Zn(II) atoms, forming a centrosymmetric dimer. Weak N-H⋯I and C-H⋯I hydrogen bonds play an important role in th...

In the title compound, {[Zn(SO(4))(C(8)H(6)N(4))]·H(2)O}(n), the Zn(II) atom is in a distorted octa-hedral environment. The Zn(II) atoms are bridged by both 2,2'-bipyrimidine and sulfate ligands, thus forming a three-dimensional polymeric metal-organic solid that contains uncoordinated water mol-ecules in the inter-stitial space. O-H⋯O hydrogen bonding consolidates the crystal structure.