Abstract: A steel including, in mass %: 0.005 to 0.015% carbon; 0.05 to 0.35% silicon, 7.45 to 8.4% nickel; 1.00%> or less manganese; 0.025%> or less sulphur; 0.030%> or less phosphorous; 24.0 to 26.0% chromium; 0.50 to 1.00% copper; 3.0 to 4.0% C molybdenum; 0.002 to 0.010% niobium; 0.75% or less cobalt; 0.015% or less aluminium; 0.20 to 0.30% nitrogen; 0.50 to 0.85%) tungsten; the balance being iron and incidental impurities.

Abstract: Scent formulation information is imparted onto an authentication token. The scent formulation information may be used in numerous authentication applications, such as security badges, airline tickets, and so forth. Various methods and systems involving such tokens are disclosed.

Abstract: Scent formulation information is imparted onto an authentication token. The scent formulation information may be used in numerous authentication applications, such as security badges, airline tickets, and so forth. Various methods and systems involving such tokens are disclosed.

Abstract: The present invention is directed to a process for treating wastewater which comprises producing a ferric hydroxide suspension directly by electrolysis of the wastewater to precipitate heavy metals and organic or inorganic suspended solids thus purifying the wastewater. The purified wastewater, which is a saturated aqueous solution of calcium sulphate, can be recycled for further treatment and production of a low sulphate ferric hydroxide suspension. The process of the present invention is suitable for treatment of wastewaters obtained from mine tailings dams, metal mine pits, etc. and avoids the problems and difficulties of the known processes.

Abstract: A process for the removal of cyanide and other impurities from an aqueous solution is disclosed. The process comprises adding copper ion and ferrous ion as reagents to the solution at a pH of about 4 to 8 with a ratio of copper to cyanide in the range of 3:1 to 10:1 by weight and with a ratio of iron to copper of at least 0.3:1 by weight.