In the title compound, {[Cu(C(8)F(4)O(4))(CH(3)OH)]·CH(3)OH}(n), two Cu(II) atoms are bridged by four carboxyl-ate groups, forming the well known paddle-wheel secondary building unit (SBU) with axial methanol ligands. In each ligand, the dihedral angles between the benzene ring and the two carboxyl-ate groups are 80.43 (17) and 62.5 (4)°. Within each SBU, the four carboxyl-ate groups come from ...

In this study heparin was covalently immobilized onto LDPE-VEMAC sheet fabricated by the introduction of carboxyl groups to the surface of low-density polyethylene (LDPE) using a plasma technique. The plasma irradiation time influenced the density of carboxyl groups on the LDPE-VEMAC sheet. Heparin was immobilized on the LDPE-VEMAC sheet using a condensation reagent, N-(3-dimethylaminopropyl)-N...

In the title complex, [Cu(C(8)H(3)NO(6))(H(2)O)(2)](n), the two carboxyl-ate groups of the 4-nitro-phthalate dianion ligands have monodentate and 1,3-bridging bonding modes, respectively. The Cu atom shows an approximate square-pyramidal coordination as it is bonded to O atoms from the carboxyl-ate groups of three 4-nitro-phthalate ligands and two O atoms of the non-equivalent coordinated water...

The title compound, [CuEu(2)(C(6)H(4)NO(2))(8)(H(2)O)(4)](n), displays a one-dimensional chain structure. The four-coordinate Cu(II) ion (site symmetry ) adopts a trans-CuN(2)O(2) geometry and is bridged by two carboxyl-ate groups from two isonicotinate ligands. The Eu(III) ion adopts a distorted square-anti-prismatic geometry, being coordinated by four O atoms from bridging carboxyl-ate groups...

Amine and carboxyl groups of the cell wall of Bacillus subtilis were chemically modified individually to neutralize their electrochemical charge for determination of their contribution to the metal uptake process. Mild alkali treatment removed ca. 94% of the constituent teichoic acid (expressed as inorganic phosphorus) and allowed estimation of metal interaction with phosphodiester bonds. Chemi...

A recently developed method for converting protein carboxyl groups to alcohols has been used to examine the functional role of carboxyl groups in the red blood cell inorganic anion-transport protein (band 3). A major goal of the work was to investigate the carboxyl group that is protonated during the proton-sulfate cotransport that takes place during net chloride-sulfate exchange. Three kinds o...

It was a strange choice to ask me, who has not contributed to the description of the titration behavior of proteins, to discuss tha t subject. Nevertheless I am pleased to attempt to summarize the state of knowledge for our present purposes. Our best objective in this monograph is surely to make ourselves and each other better informed; we will be examining the meaning of terms for that purpose...

Abstract The coprecipitation of organic carbon with iron minerals is important for its preservation in soils and sediments, but the mechanisms carbon-iron interactions thus controls on cycling are far from understood. Here we coprecipitate carboxylic acids (oxyhydr)oxide ferrihydrite use near-edge X-ray absorption fine structure spectroscopy wet chemical treatments to determine relationship bet...

A hypothetical model of the cytochrome c peroxidase.cytochrome c complex (Poulos, T. L., and Kraut, J. (1980) J. Biol. Chem. 255, 10322-10330) predicts charge interactions between aspartic acid residues of the peroxidase having a spatial distribution that is complementary to the distribution of essential and highly conserved residues of cytochrome c. In a first attempt to test this model, carbo...

Inactivated copper-sensitive and copper-tolerant strains of Mucor rouxii cultured at high copper concentration were tested for their potential to adsorb Cu(II) ions from solution. We performed batch experiments to determine the pH profile for Cu(II) binding, binding capacity and the possibility of removing the Cu(II) that had been adsorbed. The biomasses studied showed a high affinity for Cu(II...