Visits: 86427624
AMS now reading: 1




Year 2003 No 4

Kupka D., Škvarla J., Birošová E.
EVALUATION OF GROWTH RATE OF ACIDITHIOBACILLUS FERROOXIDANS OXIDIZING ELEMENTAL SULFUR
Abstract
Acidithiobacillus ferrooxidans oxidized elemental powdered sulfur to sulfuric acid in batch culture at aerobic conditions. The kinetics of bacterial growth and sulfur oxidation were evaluated from CO2 and O2 consumption rates, respectively. The culture achieved a maximum specific growth rate (?? of 0.043 h-1 (doubling time 16 hours). The exponential growth phase was followed by the lasting phase with a gradual decrease of the specific growth rate. The bacterial growth and sulfur oxidation stopped at pH 0.7. The H+ protons are considered as a main inhibitor of the bacterial growth and of the sulfur oxidizing activity.

Keywords: Acidithiobacillus ferrooxidans|sulfur|oxidation|growth kinetics|oxygen|carbon dioxide|gas analysis|sulfate|
No 4 (2003), p. 251-258
  mag01.pdf (344 kB)
mag01_eng.txt (639 B)  

Barakat M. A.
PYROMETALLURGICAL PROCESSING OF ZINC ASH AND FLUE DUST
Keywords: Zinc ash|Zinc flue dust|Pyrometallurgy|Hyrometallurgy|Waste treatment|
No 4 (2003), p. 259-269
  mag02.pdf (181 kB)
mag02_eng.txt (1 kB)  

Laubertová M., Havlík T., Gaľová P.
THE APPLICATION OF MICROWAVE ENERGY ON THE LEACHINGOF CHALCOPYRITE CONCENTRATE IN ACIDIFIED OXIDIZING MEDIUM
Keywords: hydrometallurgy|microwave energy|chalcopyrite|ferric chloride|ferric sulphate|grain size|
No 4 (2003), p. 270-276
  mag03.pdf (283 kB)
mag03_eng.txt (1 kB)  

Zrník J., Nový Z., Kvačkaj T., Bernášek V., Kešner D., Slámová M.
INFLUENCE OF DEFORMATION PROCESSING ON STRUCTUREAND PROPERTIES DEVELOPMENT OF AlMgSi ALLOY
Keywords: hot and cold plastic deformations|severe plastic deformations|SPD|equal-channel angular pressing|ECAP|recrystallization annealing|
No 4 (2003), p. 277-284
  mag04.pdf (1 MB)
mag04_eng.txt (2 kB)  

Kvačkaj T., Sokolová L., Vlado M., Mišičko R., Vrchovinský V., Nový Z.
PULSATORY FORMING – NEW METHOD OF BULK HOT PLASTIC DEFORMATIONS
Keywords: pulsator|pulsation forming|pulsation frequency|microstructure|geometrical characteristics|mechanical properties|plastic properties|formability|
No 4 (2003), p. 285-291
  mag05.pdf (443 kB)
mag05_eng.txt (1 kB)  

Khouri S, Horodníková J., Domaracká L., Bohušová V.
MANAGEMENT INFORMATION SYSTEMS
Keywords: management information systems|exploited enterprises|financial management|
No 4 (2003), p. 292-297
  mag06.pdf (212 kB)
mag06_eng.txt (3 kB)  

Vlado M., Hala K., Janák G., Hodor P., Adamkovičová J., Sokolová L.
STRUCTURAL ANALYSIS AND BASIC MECHANICAL PROPERTIES OF HOT ROLLED STRIP FROM GRAIN ORIENTED SILICON STEEL WITH HIGH COPPER CONTENT
Keywords: grain oriented silicon steel|core loss|hot rolling|structure|precipitation|mechanical properties|
No 4 (2003), p. 298-305
  mag07.pdf (1 MB)
mag07_eng.txt (1 kB)  

Harrer O., Philipp M., Pokorný I.
NUMERICAL SIMULATION OF ASYMMETRIC EFFECTS IN PLATE ROLLING
Keywords: front end bending in plate rolling|warping phenomenon in plate rolling|ski end control in plate rolling|asymmetry in strip and plate rolling|
No 4 (2003), p. 306-313
  mag08.pdf (347 kB)
mag08_eng.txt (1 kB)  

Bálintová J., Drozd.J., Kucková A.J., Fröhlichová M.
BIOLOGIC TREATMENT OF WASTE WATERS FROM COKE PRODUCTION
Keywords: waste waters from cokeries|biological waste water treatment|phenolammoniacal waters|
No 4 (2003), p. 314-320
  mag09.pdf (247 kB)
mag09_eng.txt (2 kB)