The structure of the title compound, {[Cu(SO(4))(C(6)H(7)N)(4)]·4.393H(2)O}(n), consists of Cu(2+) ions surrounded in a square-planar fashion by 4-methyl-pyridine ligands, forming two crystallographically independent Cu{H(3)C(C(5)H(4)N)}(4) units that are both located on crystallographic inversion centers. The Cu(4-methyl-pyridine)(4) units are, in turn, connected with each other via bridging s...

The transport properties, including electrical resistivity , thermopower S , and thermal conductivity of bulk metallic glass alloys Cu64Zr28.5Ti7.1, Cu62.3Zr23.7Ti10, Cu60.6Zr26.9Ti12.5 and Cu58.8Zr26.2Ti15 in the temperature range 10–300 K are reported. The temperature variations of electrical resistivity in these alloys, with a negative temperature coefficient, are found to be rather weak. Th...

Au fost realizate simulări numerice privind proiectarea unui laser de mare putere cu fibră lucrând în CW în modurile relaxat şi comutaţie pasivă, având ca scop o construcţie îmbunătăţită a sursei laser dedicate conservării operelor de artă. Rezultatele preliminare prezentate vor fi continuate cu altele privind interacţia cu ţinta (opera de artă) a fasciculului laser şi combinând cele două model...

Trends in oxygen reduction activity of Pd/Cu bimetallic random alloy nanoparticles are determined with calculations of oxygen binding for a range of compositions. A reduction in the average oxygen binding is found as Cu is added to Pd, indicating an increase in catalytic activity up to a peak at 1:1 Pd/Cu ratio. Calculations show that Cu reduces the Pd-O binding energy and Pd increases the Cu-O...

An analysis of eight pentacoordinated (aqua) copper(II) chelates with N-alkylated amino acids revealed that they could be separated in two group s with respect to the shape of their coordination polyhedra. Group I, consisting of N,N-dimethylated derivatives, can be described as distorted square pyramids with a pseudo C4v symmetry. Group II, consisting of other N-alkylated and N,N-dialkylated de...

Zinc and Cu metabolism in crustacea changes dramatically during the molt cycle. Metallothionein (MT) and MT-like proteins are implicated in the handling of both metal ions as well as in the detoxification of Cd. Distribution of Cd2 / Cu / and Zn2 / in cytosol and among MT-like species has been determined. Lobsters were treated to induce MT as in mammals with dexamethasone (dex) or stress from t...

In order to reproduce the geometry of tetracoordinated copper (II) chelates with a »distorted« coordination polyhedron (planar/ /tetrahedral), two new empirical functions for the calculation of the conformational potential were introduced. The first depends on the distorsion coordinate (1, defined as an angle between bisectors of two valence angles around the central atom. The second function i...

A previously reported density-functional-theory-based model of NO decomposition in Cu-exchanged zeolites (Schneider, W. F.; et al. J. Phys. Chem. B 1997, 101, 4353) is extended to consider more generally the Cu-zeolite catalyzed chemistry of nitrogen oxides. The catalyst active site is considered to be an isolated, zeolite (Z)-bound Cu ion, which can exist in either a reduced (Z--Cu(I)) or an o...

Rapid imaging by antitumor antibodies has been limited by the prolonged targeting kinetics and clearance of labeled whole antibodies. Genetically engineered fragments with rapid access and high retention in tumor tissue combined with rapid blood clearance are suitable for labeling with short-lived radionuclides, including positron-emitting isotopes for positron-emission tomography (PET). An eng...

In the title mol-ecule, [Cu(C(8)H(7)O(3))(ClO(4))(C(12)H(8)N(2))], the Cu(II) ion is five-coordinated by two N atoms [Cu-N = 1.995 (3) and 2.022 (3) Å] from a 1,10-phenanthroline ligand, two O atoms [Cu-O = 1.908 (2) and 1.927 (2) Å] from an o-vanillin ligand and one O atom [Cu-O = 2.510 (3) Å] from a perchlorate anion in a distorted square-pyramidal geometry. Three O atoms of the perchlorate a...