Editors and press        Scope        Editorial staff        Contact        Instructions for authors        Abstract databases        AMS online      Year 2013      Year 2012      Year 2011      Year 2010      Year 2009      Year 2008      Year 2007      Year 2006      Year 2005      Year 2004      Year 2003      Year 2002      Year 2001      Year 2000      Year 1999      Year 1998      Year 1997 2 3 4                Conferences        Linksd                 Visits: 85475655 AMS now reading: 1 search: by author by theme by key word Year 1997 No 4 Harvanová J., Štofková M., Štofko M. INFLUENCE OF AGITATION AND TEMPERATURE UPON EXTRACTION OF GOLD TO THIOUREA SOLUTION Abstract Influence of agitation and temperature upon extraction of gold to thiourea solution was studied. Rotating disc electrode technique was used for this purpose. The area of the rotating disc electrode was 0.385 cm2. Critical value of rotations per minute was found to be 300 min-1. Temperature showed to be another important factor effecting the rate of gold dissolution. Activation energy was found to be 99 kJmol-1 for temperature interval from 25oC to 35oC. Decomposition of thiourea and passivation of gold surface by orthorhombic sulphur occurred at higher temperatures. Keywords: No 4 (1997), p. 260-266   mag01.pdf (152 kB) mag01_eng.txt (591 B)   Dvorščíková J., Havlík T. EFECTIVE UTILIZATION OF OZONE IN ACIDIC OXIDATIVE LEACHING OF CHALCOPYRITE Keywords: No 4 (1997), p. 267-275   mag02.pdf (207 kB) mag02_eng.txt (1 kB)   Havlík T. SELENIUM RECOVERY POSSIBILITIES Keywords: No 4 (1997), p. 276-283   mag03.pdf (177 kB) mag03_eng.txt (1 kB)   Raschman P. KINETICS OF LEACHING OF BURNED NATURAL MAGNESITE Keywords: No 4 (1997), p. 284-291   mag04.pdf (200 kB) mag04_eng.txt (2 kB)   Hidvéghy J., Buršák M., Micheľ J. FATIGUE CRACK GROWTH IN MICROALLOYED STEEL WITH POLYHEDRAL AND NONPOLYHEDRAL MICROSTRUCTURE Keywords: No 4 (1997), p. 292-298   mag05.pdf (147 kB) mag05_eng.txt (1 kB)   Bureš R., Kohútek I. POSSIBILITIES OF CRACK PROPAGATION MODEL PROCESS IN HETEROGENEOUS STRUCTURES Keywords: No 4 (1997), p. 299-305   mag06.pdf (122 kB) mag06_eng.txt (2 kB)   Vasilko K., Bokučava G. RESULTS OF A STUDY OF DEFORMATION AND FRACTURE PROCESSES DURING GRINDING OF METALS Keywords: No 4 (1997), p. 306-314   mag07.pdf (198 kB) mag07_eng.txt (978 B)   Adamčák M., Mihok Ľ. INFLUENCE OF PRODUCTION TECHNOLOGIES ON STEEL CLEANNESS: A COMPARISON Keywords: No 4 (1997), p. 315-324   mag08.pdf (205 kB) mag08_eng.txt (1 kB)   Kret J. REQUIREMENTS ON THE QUALITY OF COKE FOR THE MODERN IRONMAKING TECHNOLOGIES Keywords: No 4 (1997), p. 325-331   mag09.pdf (213 kB) mag09_eng.txt (1 kB)   Michta-Stawiarska T., Michta M. THE ANALYTICAL ASPECT OF DIETERT’S INDEX Keywords: No 4 (1997), p. 332-337   mag10.pdf (96 kB) mag10_eng.txt (332 B)   ... © 2005 AMS HF TU Košice ALL RIGHTS RESERVED ...