Although the bactericidal effect of copper has been known for centuries, there is a current resurgence of interest in the use of this element as an antimicrobial agent. During this study the use of dendritic copper microparticles embedded in an alginate matrix as a rapid method for the deactivation of Escherichia coli ATCC 11775 was investigated. The copper/alginate produced a decrease in the m...

Tribochemical reactions frequently are decisive for friction and wear. In article number 2001673 by Christian Greiner co-workers, such investigated between copper its oxides in contact with sapphire. The authors find that freshly formed beneficial reducing friction, especially as sliding progresses. Sliding even provides enough energy a reduction of oxide to metallic copper.

Cuprous oxide-based antifouling paint is now the most common type in use, especially in the shipping industry. Anti-fouling paints prevent or slow down the growth of organisms attached to the hull, in order to improve a vessel’s performance and durability. However, copper is a scarce resource and never can be retrieved or recycled after leaching into the sea. The need to protect sensitive marin...

Although Neal, Becker & Shealy (193 I) appear to have been the first to suggest that deficiency of copper occurs naturally in livestock, it was Sjollema (1933) who first described a disease of plants and animals in parts of Holland which could be controlled by administration of copper. In cattle, goats and sheep the disease, a form of ‘Lecksucht ’, was characterized by anorexia, emaciation, ana...

Metallothioneins are small, high-Cys-containing proteins present in a wide variety of organisms including vertebrates, invertebrates, fungi, cyanobacteria, and higher plants (Hamer, 1986). Metallothioneins play a role in heavy metal detoxification, especially in respect to cadmium, copper, and zinc (Hamer, 1986). Gene disruptions of the bakers’ yeast Cupl locus that encodes a metallothionein an...

The objective of this study was to develop a numerical model for the prediction of temperature distribution, effective plastic strain distribution, and especially material flow in friction stir welding of copper plates. The DEFORM-3D software was used by incorporating a lagrangian incremental formulation. Threedimensional results of the material flow pattern which were extracted using the po...

Abstract In this study, copper-based-Nb 1-x (Ti/Ta) x Se 2 composites were prepared by powder metallurgy, and Nb copper-based with different Ti/Ta doping atomic fractions studied. physical, electrical tribological properties. Among them, the amount of Ti Ta has an important influence on properties composite material. The can improve mechanical, copper matrix within a certain range, especially w...

Poor understanding of the causes of primary hepatitis, especially idiopathic chronic hepatitis, results in limited options for adequate treatment and variable results. Elucidating the causes, aside from the copper-associated form of hepatitis, is of utmost importance to find etiology-based treatments for canine (chronic) hepatitis, when possible, most likely resulting in a better prognosis.

We report the use of triazacyclophane (TAC)-scaffolded amino acids as a structural mimic for 3-histidine metal-binding sites in metalloproteins, especially for the mimicry of type-3 copper binding sites as are present in hemocyanin, tyrosinase and catechol oxidase.