Mechanical alloying is a versatile technique for the solid state synthesis of many materials, including alloys such as iron-copper
where the elements are immiscible under equilibrium conditions. The structural and magnetic state of these alloys, and their
thermal stability, have been investigated by means of thermomagnetometry, DSC, X-ray diffraction and Mssbauer spectroscopy.
Comparison of the thermomagnetometry curves for the various alloys together with analysis of intermediate reaction products
enabled the individual thermal processes to be identified. The Curie temperature of the alloys was measured, and it was found
that on heating the metastable alloys underwent phase segregation between 300-400C.
Authors studied the effect of copper nutrition on the yield, kernel
weight and raw protein content of winter wheat. Copper was applied in the form
of copper tetramine hydroxide that was produced from a clean copper containing waste
originating from microelectronical industry. After suitable chemical
transformation this waste can be used as an excellent secondary raw material
for the preparation of copper fertilizer. The foliar application of copper
tetramine hydroxide complex at the phenological phase of tillering
significantly increased the yield, kernel weight and raw protein content of
winter wheat. The calculated copper doses that gave the maximum yield, raw
protein content and kernel weight were 1.04, 1.12 and 0.77 kg ha
photooxidized polycyclic aromatic hydrocarbon and copper on photosynthesis and plant growth: evidence that in vivo formation of reactive oxygen species is a mechanism of copper toxicity . Environ. Toxicol. Chem. 20 , 1351 – 1358
/1 Sonderheft zur Zeitschrift "Landwirtschaftliche Forschungen" , pp. 59-68.
Harrison, R. M., Johnson, W. R. 1985: The budget of lead, copper and cadmium for a major highway. The Science of the Total Environment , 46
Pseudohalide complexes of copper(II) with aliphatic bidentate amines, [Cu(N3)2(N,N-diEten)]21, [Cu(NCO)2(N,N-diEten)]22, [Cu(NCO)2(N,N-diMeen)]23, [Cu(N3)(NCS)(N,N'-diMeen)]24 and [Cu(N3)(NCO)(N,N-diMeen)]25 (N,N-diEten=N,N-diethylethylenediamine; N,N-diMeen=N,N- dimethyl-ethylenediamine and N,N'-diMeen = N,N'-dimethylethylenediamine), were prepared, characterized and their thermal behavior was investigated by TG curves. According to thermal analysis and X-ray diffraction patterns all compounds decomposed giving copper(II) oxide as final product. The mechanisms of decomposition were proposed and an order of thermal stability was established.
The back-titration of atomic oxygen chemisorbed on metallic copper using carbon monoxide is investigated by microcalorimetry.
Results from simulations based on a microkinetic model of the back-titration are used for processing of microcalorimetric
data. In addition, surface oxidation of copper by nitrous oxide is investigated by microcalorimetry. The results are compared
with results obtained by nitrous oxide reactive frontal chromatography and by static oxygen adsorption studied by microcalorimetry.
The heat of adsorption of nitrous oxide on copper amounts to 304 kJ mol−1, and the heat of adsorption of carbon monoxide on surfaceoxidized copper is in the range from 120 to 70 kJ mol−1.