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Chemistry 54 (12) 2079-2082. Phosphorus and Potassium (1965) 19, 31. Phosphorus and Potassium (1969) 41, 40. Ullmann’s encyclopedia of Industrial Chemistry, Potassium Compounds, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, p. 22, 2005, DOI: 10.1002/14356007.a22 039. Žužiova A, Khandl V, Plančik M (1988) Chemicky průmysl 38/63 (12) 643-646.

, chloran potasu i podchloryn sodu ( Research on and drawing up of process specifications for a manufacturing system comprising sodium chlorate, sodium chlorite, potassium chlorate and sodium hypochlorite )-Development Project No. R05 003 02, in Progress.

REFERENCES 1. B. Hille, Ion Channels of Excitable Membranes, Sinauer Associates, Sunderland 2001, p. 814. 2. S. Choe, Potassium channel structures, Nat. Rev. Neurosci . 3 (2002) 115–121; DOI: 10.1038/nrn727. 3. C. C. Shieh, M. Coghlan, J. P. Sullivan and M. Gopalakrishnan, Potassium channels: molecular defects, diseases, and therapeutic opportunities, Pharmacol. Rev . 52 (2000) 557–594. 4. C. A. Doupnik, N. Davidson and H. A. Lester, The inward rectifier potassium channel family, Curr. Opin. Neurobiol . 5 (1995) 268–277; DOI: 10

, J.E. - ELTUN, R. - GOODING, M.J. - JENSEN, E.S. - KÖPKE U. (Eds.). Designing and testing crop rotations for organic farming. Foulum: DARCOF, pp. 125-134. BLAKE, L. - MERCIK, S. - KOERSCHENS, M. - GOULDING, K.W.T. - STEMPEN, S. - WEIGEL, A. - POULTON, P.R. - POWLSON, D.S. 1999. Potassium content in soil, uptake in plants and the potassium balance in three European long-term field experiments. In Plant and Soil, vol. 216, pp. 1-14. DOI:10.1023/A:1004730023746. EDMEADES, D.C. - MORTON, J.D. - WALLER, J.E. - METHERELL, A.K. - ROBERTS, A.H.C. - CAREY P. 2014. The

References Abolhasani K., Saeidi G., 2004 - Relationships between agronomic characteristic of safflower under water stress and control. Iran Journal Field Cops Research, No.1, 127-138. Andersen M.N., Jensen C.R., Losch R., 1992 - The interaction effects of potassium and drought in fieldgrown barley. I. Yield, water-use efficiency and growth. Soil Plant Sci., 42, 34-44. Assmann S.M., Shimazaki K., 1999 - The multisensory guard cell, stomatal responses to blue light and abscisic acid. Plant Physiol., 119, 809-815. Banziger M, Edmeades G.O., Lafitte H.R., 2002

LITERATURE CITED 1. Retrieved December 10, 2014, from . 2. Sviklas, A.M., Paleckienė, R. & Šlinkšienė, R. (2008). Compound fertilizers , Vilnius. 3. CODEXalimentarius . Retrieved September 6, 2014 from . 4. Hu, T.J., Zeng, G.M., Huanga, D.L. & Yu, H.Y., et al. (2007). Use of potassium dihydrogen phosphate and sawdust as adsorbents of ammoniacal nitrogen in aerobic composting process. Journal of Hazardous Materials , 141 (3). 736–744. DOI

interneurons in the developing rat hippocampus. J Neurophysiol. 2000; 83(6): 3453-61. 27. Mayer EA, Loo DD, Snape WJ, Sachs G. The activation of calcium and calcium-activated potassium channels in mammalian colonic smooth muscle by substance P. J Physiol. 1990; 420: 47-71. 28. Mitra R, Morad M. Ca2+ and Ca2+-activated K+ currents in mammalian gastric smooth muscle cells. Science, 1985; 229(4710): 269-72. 29. Kawasaki S, Kimura S, Watanabe S, Fujita R, Matsumoto M, Sasaki K. Augmentinf effect of serotonin on the voltage-dependent Ca2+ current and subsequently activated K

References Costa W.A.J.M. de, Shanmugathasan K.N., 2002 - Physiology of yield determination of soybean (Glycine max L. Merr) under different irrigation regimes in the sub-humid zone of Sri Lanka. Field Crops Res., 75: 23-35. Fanaei H.R., Galavi M., Kafi A., Ghanbari Bonjar A., Shirani Rad A.H., 2011 - Effects of drought stress and potassium on solutes accumulation and chlorophyll of canola (B. napus) and Indian mustard (B. juncea L.). Water and Soil Science (Journal of Science and Technology of Agriculture and Natural Resources), 15(57): 141-156. Hatami H

-008-0044-0. Mazurek, K. (2009). Research on the development of optimal parameters of potassium compounds leaching from spent catalysts used for oxidation of sulfur(IV) oxide. Przem. Chem. 9, 1033 - 1036 (in Polish). Szczepaniak, W. (2004). Instrumental methods in analytical chemistry. Warsaw, Poland: PWN (in Polish). Brouwer, P. (2006). Theory of XRF. Almelo, Netherlands: Panalytical. Kiełkowska, U., Białowicz, K., Trypuć, M., Mazurek, K. & Grzesiak, P. (2008). Sulfuric acid - new opportunities, Extraction of vanadium compounds from the spent vanadium catalyst using NaOH

References Grzesiak, P. (2006). Utilization of industrial waste from sulfuric acid production processes. Przem. Chem. 8-9, 1015-1019 (in Polish). Grzesiak, P. (2005). Vanadium catalysts for the oxidation of SO 2 . Poznań, Poland: WN IOR (in Polish). Mazurek, K., Białowicz, K. & Trypuć, M. (2010). Extraction of vanadium compounds from the used vanadium catalyst with the potassium hydroxide solution. Polish J. Chem. Technol. 1(12), 23-28, DOI: 10.2478/v10026-010-0005-2. Grobela, M. & Grzesiak, P. (2007). The influence of iron compounds in the sulfuric acid