Abstract Chalcopyrite (CuFeS 2 ) is the most refractory copper mineral when treated in conventional sulfate media leaching systems. This first study to examine use of a dimethyl sulfoxide (CH 3 SOCH , DMSO) solution containing chloride (CuCl for chalcopyrite. Leaching experiments concentrate composed mainly chalcopyrite were conducted at ambient pressure 313–413 K. The fractions Cu, Fe, S, Au, ...

1. Jejunostomy does not prevent the development of the chemical changes of the blood characteristic of obstruction of the jejunum in the dog. 2. Jejunostomy following experimental obstruction of the jejunum has no beneficial effect upon the duration of life. There is some evidence that life may be shortened by early jejunostomy. 3. Treatment of jejunal obstruction with sodium chloride solution ...