Corresponding Author

Paper:	idn674
Name:	I. Loktev
Company:	Novosibirsk Chemical Concentrates Plant Inc.
Address:	Bogdan Khmelnitsky str. 94 Novosibirsk, 630110
Country:	Russia
Phone:	383 2 748465
Fax:	383 2 74 30 71
Email:	nccp@sol.ru