ISSN 0352-5139 J. Serb. Chem. Soc. Vol. 69, No. 12 (2004) CONTENTS Organic Chemistry and Biochemistry Y. Vaghasiya, R. Nair, M. Soni, S. Baluja and S. Shanda: Synthesis, structural determination and antibacterial activity of compounds derived from vanillin and 4-aminoantipyrine 991 A. Ni}iforovi}, M. B. Radoj~i} and B. H. Milosavljevi}: Gamma-radiation induced agglomeration of chicken muscle myosin and actine 999 R. M. Radoji~i}, S. D. Spasi}, Z. S. Sai~i}, T. B. Jovanovi} and J. B. Simi}-Krsti}: Superoxide dismutase activity as a function of culture aging of B-16 mouse melanoma cells (Preliminary communication) 1005 Polymers D. Jovanovi}, M. S. Nikoli} and J. Djonlagi}: Synthesis and characterization of biodegradable aliphatic copolyesters with hydrophilic soft segments 1013 Z. Ka~arevi}-Popovi}, D. Kostoski, Lj.Novakovi}, N. Miljevi} and B. [e}erov: Influence of the irradiation conditions on the effect of radiation on polyethylene 1029 G. Ilia, E. Fagadar-Cosma, A. Popa and S. Iliesku: Styrene-divinylbenzene copolymer grafted with phosphonic acid dialkyl esters 1043 Inorganic Chemistry J. Husárek, R. Pstorek, M. MaloÁ, Z. [indaláÍ and M. Pavlí~ek: Nicke(II) cyclohexylethyl-dithiocarbamate P-donor ligands in the coordination sphere 1053 Physical Chemistry @. N. Todorovi} and S. K. Milonji}: Determination of intrinsic equilibrium constants at alumina/electrolyte interface 1063 J. M. Resa, C. Gonzáles, J. M. Goenaga and M. Iglesias: Influence of temperature on the volumetric properties of ethanol + water + 1-pentanol 1073 Electrochemistry D. M. Dra`i}, J. P. Popi}, B. Jegdi} and D. Vasiljevi}-Radovi}: Electrochemistry of active chromium. Part IV. Dissolution of chromium in deaerated sulfuric acid 1099 Materials Z. Odanovi} and M. Djurdjevi}: Investigation of the mechanism of mercury removal from silver-amalgam alloy 1111 A. Golubovi}, S. Nikoli}, S. Djuri} and N. Rom~evi}: Pb1-xMnxTe single crystals and their structural properties 1121 Chemical Engineering @. Lj. Arsenijevi}, @. B. Grbav~i} and B. V. Grbi}: Modeling of adsorber/desorber/catalytic reactor system for ethylene oxide removal 1129 Environmental Chemistry A. Savin, D. Veselinovi} and D. Markovi}: The correlation of the values of plant-available lead and cadmium in soil determined using different types of extragents 1145 M. Radenkovi}, T. Andjeli}, M. Kova~evi} and P. Vukoti}: Depleted uranium in the air during the cleanup operation at Cape Arza 1153 Contents of Volume 69 1157 Subject index 1165 Author index 1169 J. Serb. Chem. Soc. 69 (12) 991-998 (2004) UDC 542.913+54.02:547.576+547.77 JSCS-3227 Original scientific paper Synthesis, structural determination and antibacterial activity of compounds derived from vanillin and 4aminoantipyrine YOGESH KUMAR VAGHASIYAa, RATHISH NAIRa, MAYUR SONIb, SHIPRA BALUJAb and SUMITRA CHANDAa* aDepartment of Biosciences and bDepartment of Chemistey, Saurashtra University, Rajkot 360005, India (e-mail: sumitrachanda@yahoo.com) (Received 11 February 2004) Abstract: Schiff bases derived from 4-aminoantipyrine and vanillin were evaluated for their potential as antibacterial agents against some Gram positive and Gram negative bacterial strains. The antibacterial activity was studied against P. pseudoalcaligenes ATCC 17440, P. vulgaris NCTC 8313, C. freundii ATCC 10787, E. aerogenes ATCC 13048, S. subfava NCIM 2178 and B. megaterium ATCC 9885. The determination of the antibacterial activity was done using the Agar Ditsh method. The Schiff bases produced were: (1) 4-(4-hydroxy-3-methoxybenzylideneamino)-1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one [VV1]; (2) 4-(benzylideneamino)-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one [VY2]); (3) 4-[(furan-3-ylmethylene)amino]-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one [VY3]; (4) 4-(4methoxybenzylideneamino)-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one [VY4]; (5) 2-methoxy-4[(4-methoxyphenylimino)methyl]phenol [VY5]; (6) 4-[(2,4-dimethylphenylimino)methyl]-2methoxyphenol [VY6]); (7) 2-methoxy-4-(naphthalene-1-yliminomethyl)phenol [VY7] and (8) 4-[(4hydroxy-3-methoxybenzylidene)amino]-N-(5-methylisoxazol-3-yl)benzenesulfonamide [VY8]. The antibacterial activity was evaluated in two polar solvents, DMSO and DMF. The Schiff bases derived from vanillin as the central molecule with 2,4-dimethylaniline and sulphamethoxazole as the side chain in DMSO effectively inhibited the investigated bacteria and appear to be promising antimicrobial agents. Keywords: Schiff bases, antibacterial activity, DMSO, DMF. REFERENCES 1. K. Y. Lau, A. Mayr, K. K. Cheung, Inorg. Chim. Acta 285 (1999) 223 2. A. S. Shawali, N. M. S. Harb, K. O. Badahdah, J. Heterocyclic Chem. 22 (1985) 1397 3. N. Raman, V. Muthuraj, S. Ravichandran, A. Kulandaisamy, Proc. Ind. Acad. Sci. 115 (2003) 161 4. S. K. Sridhar, A. Ramesh, Ind. J. Chem. Soc. 41 (2002) 668 5. Z. Wei, C. Qiong, H. Chao-gang, Huazhong Shifan Daxue. Xuebao Zirankexue ban 36 (2002) 478 6. Y. Dong-Dong, J. Yan Lan, S. Lu, Chinese J. Chem. 19 (2001) 1136 7. P. Piotr, B. Bogumil, Biopolymers 67 (2002) 61 8. Rh. Miao, Li. Shuoliong, Y. Rudong, V. L. Y. Welbing, Ind. J. Chem. 42 (2003) 318 9. Z. Yuxia, Z. Tao, M. Wanshan, Z. Haibin, C. Suifeng, Hauxue Shiji 24 (2002) 117 10. M. A. Gawad, Y. M. Issa, S. M. Abd-Alhamid, Egypt J. Pharm. Sci 34 (1993) 219 11. V. V. Mulwad, J. M. Shirodkar, Ind. J. Hetrocyclic Chem. 11 (2002) 199 12. N. Sari, S. Arslan, E. Logoglu, I. Sariyan, G. U. J. Sci 16 (2003) 283 13. S. Rao, A. S. Mitra, J. Ind. Chem. Soc. 55 (1978) 420 14. S. A. Khan, A. A. Siddiqui, B. Shibeer, Asian J. Chem. 14 (2002) 117 15. A. Marchetti, C. Preti, M. Tagliazucchi, L Tassil, G. Tosi, J. Chem. Eng. Data 36 (1991) 360. J. Serb. Chem. Soc. 69 (12) 999-1006 (2004) UDC 51–78+502.57:547.96+637.413 JSCS-3228 Original scientific paper Gamma-radiation induced damage of proteins in the thick fraction of egg white MARIJA VU^KOVI] and MARIJA B. RADOJ^I] Laboratory of Molecular Biology and Endocrinology, Vin~a, Institute of Nuclear Sciences, P.O.Box 522, 11001 Belgrade, Serbia and Montenegro, (e-mail: marija@vin.bg.ac.yu) (Received 5 December 2003, revised 16. March 2004) Abstract: Quantitative and qualitative data on the radiolytic behaviour of moderately complex protein structures may be of great prospective help for a better understanding of the biological effects of ionizing radiation in vivo. One such convenient model system is the protein hydrogel of the thick fraction of egg white, the protein network of which is similar to the structures of mammalian mucous tissues. In this study, the hydrogel of the thick fraction of egg white was saturated with N2O and irradiated with 1.5 – 45 kGy from a 60Co-gamma ray source. The structural alterations of the hydrogel proteins were followed by Sephadex G-200 exclusion chromatography, denaturing SDS-polyacrylamide gel electrophoresis, viscosity and turbidity measurements. The results indicate that irradiation led to a breakdown of the protein network of the thick fraction of egg white and to cross-linking and fragmentation of its constituents. The hydrogel decomposition, as well as the constituent protein cross-linking and fragmentation, were dose–dependent processes, with fragmentation prevailing below absorbed dosis of 10-15 kGy, and cross-linking prevaling at doses > 15 kGy. The observed radiolytic behaviour of the protein hydrogel of the thick fraction of egg white suggested that irradiation of similar mucin containing structures might also result in an accumulaton of structurally altered and conceivably non-functional proteins in vivo. REFERENCES 1. E. J. Hall, Linear Energy Transfer and Relative Biological Effectiveness, in Radiobiology for the Radiologist, Eric J.Hall, Ed., J. B. Lippincott Co., Philadelphia, 1994 pp. 153-164 2. M. C. Rose, W. A. Voter, C. F. Brown, B. Kaufman, Biochem. J. 222 (1984) 371 3. J. K. Sheehan, I. Carlstedt, Biochem. J. 221 (1984) 499 4. A. L. Romanoff, A. J. Romanoff, Chemistry of the Nonembryonic Portions of the Egg., in Biochemistry of the Avian Embryo, Alexis L. Romanoff and Anastasia J. Romanoff, Eds., Wiley, New York, 1967 pp. 177-232 5. M. Vu~kovi}, M. B. Radoj~i}, B. H. Milosavljevi}, J. Serb. Chem. Soc. 65 (2000) 157 6. C. Rabouille, M. A. Aon, D. Thomas, Arch. Biochem. Biophys. 270 (1989) 495 7. D. S. Robinson, J. B. Monsey, Biochem. J. 121 (1971) 537 8. Lj. Josimovi} M. Radoj~i}, B. H. Milosavljevi}, Radiation Phys. Chem. 47 (1996) 445 9. M. Radoj~i}, Lj. Josimovi}, B. H. Milosavljevi}, Polymer Preprints 35 (1994) 35 10. K. J. A. Davies, J. Biol. Chem. 262 (1987) 9895 11. W. M. Garrison, Chem. Rev. 87 (1987) 381 12. O. Yamamoto: Effect of Radiation on Protein Stability, in Stability of Protein Pharmaceuticals, Part. A: Chemical and Physical Pathways of Protein Degradation (T.J. Ahern and M.C. Manning, Eds., Plenum Press, New York 1992 pp. 361-421 13. J. Kuljanin, G. Vuj~i}, M. Radoji~i}, B. H. Milosavljevi}, J. Polymer Science, Part. B: Polymer Physics 38 (2000) 1729 14. Z. Tuce, E. Janata, M. Radoj~i}, B. H. Milosavljevi}, Radiat. Phys. Chem. 62 (2001) 325 15. U. K. Laemmli, Nature 227 (1970) 680 16. H. A. McKenzie, M. B. Smith, R. G. Wake, Biochem. Biophys. Acta 69 (1963) 222 17. I. Santra, B. K. Chatterjee, D. Bhaumink, S. C. Roy, Phys. Rev. A 43 (1991) 4296. J. Serb. Chem. Soc. 69 (12) 999-1004 (2004) UDC 54–78:636.52/.58:547.962.4 JSCS-3228 Original scientific paper Gamma-radiation induced agglomeration of chicken muscle myosin and actin ANA NI]IFOROVI], MARIJA B. RADOJ^I] and BRATOLJUB H. MILOSAVLJEVI] Laboratory of Molecular Biology and Endocrinology, Vin~a Institute of Nuclear Sciences, P.O. Box 522-090, 11001 Belgrade, Serbia and Montenegro (e-mail: bmilosav@nd.edu) (Received 24 November 2003 revised 24 December 2004) Abstract: Radiolytic behaviour of the major vertebrate muscle proteins: fibrillar myosin (molar mass, Mm = 520,000 g/mol) and filament forming actin (Mm = 42,050 g/mol) was studied using a SDS-polyacrylamide gel electrophoresis and quantified by high precision laser-densitometry. In order to study the OH radical contribution to the radiation damage, purified chicken myosin and actin (4 mM) were prepared in N2O saturated solution and irradiated with 1–3 kGy at 60Co gamma source. With respect to changes in the molecular mass, the only observed myosin and actin damage was dose dependent agglomeration of proteins. The corresponding radiation chemical yields of 5 ´ 10-8 mol J-1 and 6.3 ´ 10-8 mol J-1 were obtained for myosin and actin, respectively. This result confirmed that only the radiation-induced agglomeration is initiated with the reaction of the OH radical even in the situation where the OH radical concentration produced exceeds the protein concentration 500 times, thus enabling the multi-radical attack to occur. Keywords: radiation, gamma rays, myosin, actin, protein agglomeration. REFERENCES 1. Irradiation in the Production, Processing and Handling of Food 21. CRF Part 179 of the USA-Federal Register 62 (1997) 64107 2. The Codex Book of Trading Conditions for Foodstuff and General Use of Objects Conserved by Irradiation, Sl. list SFRJ 69 (1984) p. 1521 (in Serbian) 3. M. H. Stevenson, Proc. Nutrition Soc. 53 (1994) 317 4. A. Ni}iforovi}, M. Radoj~i}, B. H. Milosavljevi}, Radiat. Phys. Chem. 55 (1999) 731 5. E. W. Taylor, Science 261 (1993) 35 6. I. Rayment, R. Rypniewski, K. Schmidt-Base, R. Smith, D. R. Tomchick, M. M. Benning, D. A. Winkelmann, G. Wasenberg, H. M. Holden, Science 261 (1993) 50 7. I. Rayment, H. M. Holden, M. Whittaker, C. B. Yohn, M. Lorenz, K. C. Holmes, R. A. Milligan, Science 261 (1993) 58 8. M. Lemaire, L. Thauvette, B. DeForesta, A. Viel, G. Beauregard, M. Potier, Biochem. J. 267 (1990) 431 9. J. H. Bowes, J. A. Moss, Radiat. Res. 16 (1962) 211 10. U. K. Laemmli: Nature 227 (1970) 680 11. Z. Tuce, E. Janata, M. Radojcic, B. H. Milosavljevic, Radiat. Phys. Chem. 62 (2001) 325 12. Lj. Josimovi}, M. Radojcic, B. H. Milosavljevic, Radiat. Phys. Chem. 47 (1996) 445 13. W. M. Garrison, Chem. Rev. 87 (1987) 381 14. O. Yamamoto: Stability of Protein Pharmaceuticals, Part. A: Chemical and Physical Pathways of Protein Degradation, Plenum Press, New York (1992) pp. 361–421. J. Serb. Chem. Soc. 69 (12) 1005-1011 (2004) UDC 577.15:576.385:577.164.1 JSCS-3229 Preliminary communicaton PRELIMINARY COMMUNICATION Superoxide dismutase activity as a function of culture aging of B-16 mouse melanoma cells RATKO M. RADOJI^I]1, SNE@ANA D. SPASI]2, ZORICA S. SAI^I]3, TAMARA B. JOVANOVI]4 and JOVANA B. SIMI]-KRSTI]4 1Institute of Physiology and Biochemistry, Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade (e-mail: ratko@bf.bio.bg.ac.yu), 2Center for Chemistry ICTM, P.O. Box 815, 11000 Belgrade, 3Institute for Biological Research “Sini{a Stankovi}”, Department of Physiology, Bul. Despota Stevana 142, Belgrade and 4Fullerene Science and Technology Centre, Chemical Power Sources Institute, Batajni~ki put 23, Belgrade-Zemun, Serbia and Montenegro (Received 15 December 2003, revised 8 March 2004) Abstract: The C3 clone of B-16 mouse melanoma was cultured for 1, 6 and 9 days and analysed. The changes which are not directly linked to melanogenesis in the B-16 / C3 cultures during their maturation were characterized. Early (1 day), confluent (6 days) and old (9 days) cell cultures are distinguished by their leucine aminopeptidase (LAP) and a-naphthyl acetate esterase (ANAE) isoenzyme patterns. Both quantitative and qualitative changes in LAP and ANAE isoenzyme can be observed during culture maturation. There is an increase in the activity of the enzyme copper, zinc-containing superoxide-dismutase (CuZn SOD). The increaase in the CuZn SOD enzyme activity might be related to B-16/C3 cell melanogenesis and / or to differentiation. Keywords: B-16 mouse melanoma, isoenzymes, a-naphthyl acetate esterase (ANAE), leucine aminopeptidase (LAP), copper, zinc–containing superoxide dismutase (CuZn SOD). REFERENCES 1. J. T. Chang, K. T. Chen, C. L. L. Wang, Acta Biotechnol. 21 (2001), 243 2. A. Wozniak, B. Wozniak, G. Drewa, T. Drewa, Melanoma Res. 13 (2003) 19 3. H. C. Ha, A. Thiagalingam, B. D. Nelkin, R. A. Casero, Jr. Chim. Cancer Res. 6 (2003) 3783 4. W. Doge, Physiol. Rev. 82 (2002) 47 5. G. M. Bartoli, S. Bartoli, T. Galeotti, E. Bertoli, Biochim. Biophys. Acta 620 (1980) 205 6. D. P. Loven, L. W. Oberley, F. M. Rousseau, R. H. Stevans, J. Natl. Cancer Inst. 6 (1980) 377 7. A. Varachaud, O. Berthiervergnes, M. Rigaud, D. Schmitt, P. Bernard, Eur. J. Dermatology 8 (1998) 90 8. L. W. Oberley, T. D. Oberley, in Free Radicals, Aging and Degenerative Diseases J. E. Johnson, R. Walford, D. Harman, J. Miguel (Eds) 8 (1986) 325 9. O. H. Lowry, H. J. Rosebrough, A. L. Farr, R. J. J. Randal, J. Biol. Chem. 193 (1951) 265 10. H. P. Misra, I. Fridovich, J. Biol. Chem. 247 (1972) 3170 11. B. J. Davis, Ann. N. Y. Acad. Sci. 121 (1964) 404 12. C. Beauchamp, I. Fridovich, Biochim. Biophys. Acta 317 (1973) 50 13. J. G. Scandalious, Biochem. Genet. 3 (1969) 37 14. S. D. Tanskley, C. M. Rick, Theor. Appl. Genet. 56 (1980) 209 15. P. G. Hoel, Introduction to Mathematical Statistics (1966) 402 16. J. W. Kreider, M. F. Schmoyer, J. Natl. Cancer Inst. 55 (1975) 641 17. G. B. Pierce, Fed. Proc. 29 (1970) 1248 18. B. Kasraee, Dermatology, 205 (2002) 329 19. J. N. A. Vam Balgoy, E. Roberts, Biochem.Physiol. 62 (1979) 263 20. R. Morandini, J. M. Boeynaems, X. Duhant, F. Jacquemotte, E. Kinnaert, G. Ghanem, Cell. Mol. Biol. 45 (1999), 1053 21. P. A. Riley, Cell. Mol. Biol. 45 (1999) 951 22. M. M. Wick, Cancer Res. 40 (1980) 1414 23. M. M. Wick, Science 199 (1978) 775 24. M. M. Wick, Cancer Treat. Rep. 65 (1981) 861 25. P. G. Parsons, Biochem. Pharmacol. 34 (1985) 1801 26. Y. Tomita, A. Hariv, C. Kato, M. Seiji, J. Invest. Derm. 82 (1984) 573 27. M. R. Nogues, M. Giralt, I. Cervello, D. Delcatstillo, O. Espeso, N. Argany, A. Aliaga, J. Mallol, J. Invest. Derm. 119 (2002) 645. J. Serb. Chem. Soc. 69 (12) 1013-1028 (2004) UDC 542.913+678.741/.744:667.613.5:620.193.8 JSCS-3230 Original scientific paper Synthesis and characterization of biodegradable aliphatic copolyesters with hydrophilic soft segments DANIJELA JOVANOVI], MARIJA S. NIKOLI]# and JASNA DJONLAGI] Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia and Montenegro (e-mail: jasna@tmf.bg.ac.yu) (Received 15 April 2004) Abstract: In this study, the synthesis, structure and physical properties of two series of segmented poly(ester-ether)s based on poly(butylene succinate) and two different types of polyethers were investigated. The poly(ester-ether)s were synthesized by transesterification reaction of dimethyl succinate, 1,4-butanediol and poly(ethylene oxide) (PEO, Mn = 1000 g/mol) in the first series, and poly(tetramethylene oxide) (PTMO, Mn = 1000 g/mol) in the second. The mass fraction of soft segments was varied between 10 and 50 mass. %. The effect of the introduction of two different polyether soft segments on the structure, thermal and rheological properties were investigated. The composition of the poly(ester-ether)s, determined from their 1H-NMR spectra, showed that incorporation of soft polyether segments was successfully performed by the transesterification reaction in bulk. The molecular weight was estimated from solution viscosity measurements and complex dynamic viscosities. The thermal properties investigated by DSC indicated that the presence of soft segments lowers the melting and crystallization temperature of the hard phase, as well as the degree of crystallinity. Dynamical mechanical analysis was used to investigate the influence of composition on the rheological behavior of the segmented poly(esterether)s. The results obtained from an enzymatic degradation test performed on some of the synthesized polymers showed that the biodegradability is enhanced with increasing hydrophilicity. Keywods: poly(ester-ether)s, poly(butylene succinate), poly(ethylene oxide), poly(tetramethylene oxide). REFERENCES 1. A. C. Albertson, I. Varma, Adv. Polym. Sci. 157 (2002) 1 2. A. K. Mohanty, M. Misra, G.Hinrichsen, Macromol. Matter. Eng. 276/277 (2000) 1 3. M. Mochizuki, K. Mukai, K. Yamada, N. Ichise, S. Murase, Y. Iwaya, Macromolecules 30 (1997) 7403 4. H. Shirahama, Y. Kawaguchi, M. S. Aludin, H. Yasuda, J. Appl. Polym. Sci. 80 (2001) 340 5. M. Mochizuki, M. Hirami, Polym. Adv. Techn. 8 (1997) 203 6. T. Fujimaki, Polym. Deg. Stab. 59 (1998) 209 7. A. M. Reed, D. K. Gilding, Polymer 22 (1981) 499 8. M. Nagata, T. Kiyotsukuri, S. Minami, N. Tsutsumi, W. Sakai, Polym. Int. 39 (1996) 83 9. A. A. Deschamps, D. W. Grijpma, J. Feijen, Polymer 42 (2001) 9335 10. Y. Tokiwa, T. Suzuki, J. Appl. Polym. Sci. 26 (1981) 441 11. U. Witt. R.- J. Müller, W.- D. Deckwer, J. Macromol. Sci.-Chem. A32(4) (1995) 851 12. A. A. Deschamps, A. A. van Apeldoorn, J. D. de Bruijn, D. W. Grijpma, J. Feijen, Biomaterials 24 (2003) 2643 13. S.-I. Lee, S. -C. Yu, Y. -S. Lee, Polym. Deg. Stab. 72 (2001) 81 14. M. Nagata, T. Kiyotsukuri, S. Takeuchi, N. Tsutsumi, W. Sakai, Polym. Int. 42 (1997) 33 15. A. -C. Albertsson, O. Ljungquist, J. Macromol. Sci.-Chem. A23(3) (1986) 411 16. D. Chen, H. Chen, J. Bei, S. Wang, Polym. Int. 49 (2000) 269 17. F. Yao, Y. Bai, Y. Zhou, C. Liu, H. Wang, K. Yao, J. Polym. Sci: Polym. Chem. 41 (2003) 2073 18. Z. Gan, T. F. Jim, M. Li, Z. Yuer, S. Wang, C. Wu, Macromolecules 32 (1999) 590 19. J. Li, X.Li, X. Ni, K. W. Leong, Macromolecules 36 (2003) 2661 20. Y. H. Park, C. G. Cho, J. Appl. Polym. Sci 79 (2001) 2067 21. G. E. Sweet, J. P. Bell, J. Polym. Sci.: Part A-2 10 (1972) 1273 22. M. Yasuniwa, T. Satou, J. Polym. Sci.: Part B 40 (2002) 2411 23. M. S. Nikolic, J. Djonlagic, Polym. Deg. Stab. 74 (2001) 263 24. D. W. van Krevelen, Properties of Polymers, Elsevier, Amsterdam, 1990. J. Serb. Chem. Soc. 69 (12) 1029–1041 (2004) UDC 678.4–036.7:66.095.26.085 JSCS-3231 Original scientific paper Influence of the irradiation conditions on the effect of radiation on polyethylene ZORICA KA^AREVI]-POPOVI], DU[AN KOSTOSKI, LJILJANA NOVAKOVI], NADA MILJEVI] and BOJANA [E]EROV Vin~a Institute of Nuclear Sciences, P. O. Box 522, 11001 Belgrade, Serbia and Montenegro (e-mail: zkacar@vin.bg.ac.yu) (Received 6 May, revised 18 May 2004) Abstract: Two types of polyethylene, low density (LDPE) and high density (HDPE), as well as low density polyethylene containing an antioxidant were subjected to g-irradiation in the presence of air and in water. The irradiated polymers were studied using IR spectrophotometric analysis. The radiation induced oxidative degradation was followed through the formation of oxygen containing groups by the development of bands in the 1850–1650 cm-1 region and double bonds formation by the development of bands in the 1050–850 cm-1 region. The crosslinking efficiency was determined by measuring the gel content by extraction with xylene. The radiation induced changes in the molecular structure, evolution of oxygen containing species and formation, of vinyl double bonds as well as of the crosslinking efficiency are discussed in terms of the properties of the polymers in an electric field of low strength. Keywords: HDPE, LDPE, g-irradiation, carbonyl groups, vinylene groups, trans-vinylene groups, crosslinking. REFERENCES 1. A. Sing, J. Silverman, in. Radiation Processing of Polymers, Radiation Processing - An Overview A. Singh, J. Silverman, Eds. Hanser Publ. Munich, 1992, p. 6 2. Z. Ka~arevi}-Popovi}, D.Kostoski, Lj. Novakovi}, Rad. Phys. Chem. 55 (1999) 645 3. R. Setnescu, S. Jipa, T. Setnescu, C. Podina, Z. Osawa, Polym. Degrad. Stab. 61 (1998) 109 4. G. Chen, H. M. Banford, A. E. Davies, Conference on Electrical Insulation and Dieletric Phenomena, San Francisco, October 20–23, 1996, IEEE Ann. Rep., 821 5. A. R. R. Zahran, A. Y. Kander, A. A. Hegazy, M. E. Kassem, J. Appl. Polym. Sci. 49 (1993) 1291 6. P. Hedvig. Dielectric Spectroscopy of Polymers; Academia Kiado, Budapest, 1977, p. 160 7. The Radiation Chemistry of Macromolecules Vol. 2, M. Dole, Ed., Academic Press, New York, 1973, p. 271 8. E. Suljovruji}, Z. Ka~arevi}-Popovi}, D. Kostoski, J. Doj~ilovi}, Polym. Degrad. Stab. 71 (2001) 367 9. E. Suljovruji}, D. Kostoski, J. Doj~ilovi}, Polym. Degrad. Stab. 74 (2001) 167 10. E. Suljovruji}, D. Kostoski, Z. Ka~arevi}-Popovi}, J. Doj~inovi}, Polym. Int. 48 (1999) 1193 11. T. Okada, L. Mandelkern, J. Polym. Sci. 5 A-2 (1967) 239 12. G. Kampf, Characterizaton of Plastics by Physical Methods, Hanser Pub., Munich, 1986 13. H. M. Banford, R. A. Furacre, G. Chen, D. J. Tedford, Rad. Phys. Chem. 40 (1992) 401 14. A. Chapiro. The Radiation Chemistry of Polymeric Systems. Intersience/John Wiley and Sons, 1962, p. 429 15. R. A. Jones, I. M. Ward, D. J. Taylor, R. F. T. Stepto, Polymer 37 (1996) 3643 16. R. A. Jones, D. J. Groves, I. M. Ward, D. J. R. Taylor, R. F. T. Stepto, Nucl. Inst. Meth. Phys. Res. B 151 (1999) 213 17. R. M. Silverstein, G. C. Basler. Spectrometric Identification of Organic Compounds. Wiley, New York, 1967, p. 90 18. F. Gugumus, Polym. Degrad. Stab. 65 (1999) 5 19. I. G. Dragani}, Radiochimica Acta 70/71 (1995) 317 20. I. G. Dragani}, Z. D. Dragani}, The Radiation Chemistry of Water, Academic Press, New York, 1971, p.p. 91–116 21. R. J. Fleming, Rad. Phys. Chem.36 (1990) 59 22. T. Suguchi, S. Hashimoto, K. Arakawa, N. Hayakava, W. Kawakami, I. Kuriyama, Radiat. Phys. Chem. 17 (1981) 195 23. Y. Tabata, ACS Symposium Series 475 (1991) 31 24. M. Marinovi}-Cincovi}, Z. Ka~arevi}-Popovi}, D. Babi}, Radiat. Phys. Chem. 67 (2003) 425 25. Z. Ka~arevi}-Popovi}, D. Kostoski D. Z. Stojanovi}, V. \okovi}, Polym. Degrad. Stab. 56 (1997) 227 26. R. G. Brown, J. Appl. Phys. 34 (1963) 2382 27. G. Chen, R. A. Fouracre, H. M. Banford, D. J. Tedford, Rad. Phys. Chem. 37 (1991) 523 28. A. Kron, T. Reitberger, B. Stenberg, Polym. Int. 42 (1997) 131 29. Z. Zoepfl, V. Markovi}, J. Silverman, J. Polym. Sci. Polym. Chem. 22 (1984) 2017 30. F. M. Rugg, J. J. Smith, L. H. Wartman, J. Polym. Sci. 11 (1986) 1 31. G. Akay, F. Cimen, T. Tincer, Radiat. Phys. Chem. 36 (1990) 337. J. Serb. Che. Soc. 69 (12) 1043–1051 (2004) UDC 547.538+678–13+547.315.2:543.216.185 JSCS-3232 Original scientific paper Styrene-divinylbenzene copolymer grafted with phosphonic acid dialkylesters GHEORGHE ILIA, EUGENIA FAGADAR-COSMA, ADRIANA POPA and SMARANDA ILIESCU Romania Academy, Institute of Chemistry, 24 M. Viteazul Bv., 300223 Timisoara, Romania (e-mail:ilia@acad-icht.tm.edu.ro) (Received 5 Decembar, revised 18 May 2004) Abstract: The functionalization of a crosslinked chloromethylated polystyrene 8% divinylbenzene copolymer with phosphonic ester groups is detailed. The reacton conditions were studied in order to determine the optimal conditions for obtaining only diesters. A statistical method for the calculation of the fraction of repetive units for the inited and final resin is proposed. Keywords: styrene–divinylbenzene, chloromethylated, phosphonic acid dialkylester. REFERENCES 1. C. N. K. Mather, C. K. Harang, Polymers as Aids in Organic Chemistry, Academic Press, New York, 1980 2. P. Hodge, D. S. Sherrington, Polymer-suported. Reaction in Organic Synthesis, Wiley, London, 1980 3. T. Sekine, Y. Hasagawa, Solvent Extraction Chemistry, M. Dekker, New York, 1977 4. M. E. Bates, S. D. Alexandratos, Macromolecules 21 (1988) 2905 5. S. A. Alexandratos, D. R. Quillen, M. E. Bates, Macromolecules 20 (1987) 191 6. J. P. Clay, J. Org. Chem. 16 (1951) 892 7. A. M. Kinnear, E. A. Perren, J. Am. Chem. Soc. (1952) 3437. J. Serb. Chem. Soc. 69 (12) 1053-1061 (2004) UDC 546.742+547.629:543.422.25:632.952 JSCS-3233 Original scientific paper Nickel(II) cyclohexylethyldithiocarbamate complexes with monodentate P-donor ligands in the coordination sphere JOSEF HUS;REK, RICHARD PASTOREK, MICHAL MALOÀ, ZDENŒK [INDAL;Ì and MAREK PAVLÍ^EK Department of Inorganic Chemistry, Palacký University, Kri`kovského 10, 771 47 Olomouc, Czech Republic(e-mail: johus@email.cz.) (Received 12 January, revised 12 May 2004) Abstract: A series of new Ni(II) dithiocarbamate compounds of the composition [NiX(cetdtc)(PR3)] (X = Cl, Br, I, NCS; cetdtc = cyclohexylethyldithiocarbamate; R = phenyl, n-butyl) has been synthesized. All the isolated complexes have been characterized by elemental analysis, IR and UV/VIS spectroscopy, 31P{1H}NMR spectroscopy, thermal analysis, magnetochemical and conductivity measurements. On the basis of the results of the physico-chemical study, all complexes are diamagnetic, non-electrolytes, with a squareplanar NiS2PX chromophore. Keywords: nickel(II) cyclohexylethyldithiocarbamate complexes, monodantate P-donor ligands, synthesis, 31P{1H}-NMR spectroscopy. REFERENCES 1. I. M. Pannacciulli, R. A. Lerza, G. U. Bogliolo, M. P. Mencoboni, Brit. J. Cancer 59 (1989) 371 2. E. M. Hersh, G. Brewton, D. Abrams, J. Barlett, J. Galpin, P. Gill, R. Gorter, M. Gottlieb, J. J. Jonikas, S. Landesman, A. Levine, A. Marcel, E. A. Petersen, M. Whiteside, J. Zahradnik, C. Negron, F. Boutitie, J. Caraux, J. M. Dupuy, L. R. Salmi, J. Am. Med. Assoc. 265 (1991) 1538 3. R. Mital, N. Jain, T. S. Srivastava, Inorg. Chim. Acta 166 (1989) 135 4. J. H. Montgomery, Agrochemical Desk Reference Environmental Data, Lewis Publishers, Michigan, 1993, p. 261 5. H. S. Sangari, G. S. Sodhi, J. Kaur, Indian J. Chem. 32A (1993) 730 6. M. J. Cox, E. R. T. Tiekink, Z. Kristallogr. 214 (1999) 242 7. K. Ramalingam, G. Aravamudan, M. Seshasayee, Inorg. Chim. Acta 128 (1987) 231 8. A. Manohar, V. Venkatachalam, K. Ramalingam, U. Casellato, R. Graziani, Polyhedron 16 (1997) 1971 9. S. Thirumaran, K. Ramalingam, Transition Met. Chem. 25 (2000) 60 10. R. Pastorek, J. Kamení~ek, J. Husárek, M. Pavlí~ek, Z. [indeláÍ, @. @ák, Polish. J. Chem. 76 (2002) 1545 11. C. A. Tsipis, D. P. Kessissoglou, G. E. Manoussakis, Inorg. Chim. Acta 65 (1982) L137 12. C. A. Tsipis, D. P. Kessissoglou, G. E. Manoussakis, Chim. Chron. New Series 11 (1982) 235 13. C. A. Tsipis, D. P. Kessissoglou, G. A. Katsoulos, Chim. Chron., New Series 14 (1985) 195 14. R. Pastorek, J. Kamení~ek, F. BÍezina, Z. [indeláÍ, E. JehláÍová, N. V. Duffy, T. Glowiak, Chem. Papers 48 (1994) 317 15. R. Pastorek, J. Kameni~ek, Z. Trávnní~ek, J. Husárek, N. V. Duffy, Polyhedron 18 (1999) 2879 16. R. Pastorek, J. Kamení~ek, P. Krystýnková, Z. [indeláÍ, Acta Univ. Palacki. Olom., Chemica 39 (2000) 63 17. Gmelins Handbuch der Anorganischen Chemie, Nickel, Teil C, Lief. 2, Verlag Chemie, GmbH, Weinheim, 1969, p. 996 18. Gmelins Handbuch der Anorganischen Chemie, Nickel, Teil C, Lief. 2, Verlag Chemie, GmbH, Weinheim, 1969, p. 1043 19. R. PÍibil, Komplexometrické titrace, SNTL, Praha, 1955, p. 22 20. M. Jure~ek, Organická analýza II, ^SAV, Praha, 1957, p. 140 21. W. J. Geary, Coord. Chem. Rev. 7 (1971) 81 22. S. V. Larionov, L. A. Patrina, I. M. Oglezneva, E. M. Uskov, Koord. Chim. 10 (1984) 92 23. I. E. ^ernikova, I. A. Chartonic, D. S. Umrejko, A. B. Kavrikov, V. I. Afanov, Koord. Chim. 15 (1989) 1695 24. A. B. P. Lever, Inorganic Electronic Spectroscopy 2nd ed. Elsevier, Amsterdam, 1984, p. 534 25. B. A. Prakasam, K. Ramalingam, G. Bocelli, R. Olla, Z. Anorg. Allg. Chem. 630 (2004) 301 26. B. A. Prakasam, K. Ramalingam, M. Saravanan, G. Bocelli, A. Cantoni, Polyhedron 23 (2004) 77 27. R. Pastorek, J. Kamení~ek, B. Cvek, M. Pavlí~ek, Z. [indeláÍ, Z. @ák, J. Coord. Chem. 56 (2003) 1123. J. Serb. Chem. Soc. 69 (12) 1063–1072 (2004) UDC 661.183.8+541.135:541.125:54–128 JSCS-3234 Original scientific paper Determination of intrinsic equilibrium constants at an alumina/electrolyte interface @AKLINA N. TODOROVI]# and SLOBODAN K. MILONJI] Chemical Dynamics Laboratory, The Vin~a Institute of Nuclear Sciences, P. O. Box 522, 11001 Belgrade, Serbia & Montenegro (e-mail: smiloni@vin.bg.ac.yu) (Received 5 March 2004) Abstract: Intrinsic ionization and complexation constants at an alumina/electrolyte interface were studied by the site binding model, while the sorption of alkali cations from aqueous solutions was interpreted by the triple-layer model. The surface properties of alumina were investigated by the potentiometric acid-base titration method. The point of zero charge (pHpzc) of alumina obtained by this method was found to be 7.2. The obtained mean values of the intrinsic protonation and ionization constants of the surface hydroxyl groups and the intrinsic surface complexation constant, in different electrolytes, are pKinta1 = 4.4, pKinta2 = 9.6 and pKintM+ = 9.5, respectively. Keywords: alumina, surface properties, point of zero charge, intrinsic ionization and complexation contants. REFERENCES 1. D. E. Yates, S. Levine, T. W. Healy, J. Chem. Soc., Faraday Trans. I 70 (1974) 1807 2. J. A. Davis, R. O. James, J. O. Leckie, J. Colloid Interface Sci. 67 (1978) 480 3. J. A. Davis, J. O. Leckie, J. Colloid Interface Sci. 67 (1978) 90 4. J. A. Davis, J. O. Leckie, J. Colloid Interface Sci. 74 (1978) 32 5. R. O. James, J. A. Davis, J. O. Leckie, J. Colloid Interface Sci. 65 (1978) 331 6. R. O. James, G. A. Parks, in Surface and Colloid Science, vol. 12, E. Matijevi}, Ed., Plenum, 1982, p. 119 7. S. K. Milonjic, Ph. D. Thesis, Faculty of Science, University of Belgrade, Belgrade, 1981 8. G. H. Bolt, J. Phys. Chem. 61 (1957) 1166 9. G. A. Parks, P. L. de Bruyn, J. Phys. Chem. 66 (1962) 967 10. @. N. Todorovi}, S. K. Milonji}, S. P. Zec, V. T. Dondur, Mater. Sci. Forum, accepted for publication 11. A. J. Vu~ina-Vujovi}, I. A. Jankovi}, S. K. Milonji}, J. M. Nedeljkovi}, Colloids Surfaces A 223 (2003) 295 12. M. Dj. Petkovi}, S. K. Milonji}, V. T. Dondur, Bull. Chem. Soc. Jpn. 68 (1995) 2133 13. M. P. Sidorova, L. E. Ermakova, V. D. Kaigarodova, D. K. Taser, Kolloidnii Zh. 41 (1979) 495 14. K. W. Goyne, A. R. Zimmerman, B. L. Newalker, S. Komarneni, S. L. Brantley, J. Chorover, J. Porous Mat. 9 (2002) 243 15. M. Dj. Petkovi}, S. K. Milonji}, V. T. Dondur, Sep. Sci. Techn. 29 (1994) 627 16. W. Jonusz, J. Szczypa, Mater. Sci. Forum 25-26 (1988) 427 17. M.Kosmulski, J. Colloid Interface Sci. 135 (1990) 590 18. S. Mustafa, B. Dilara, Z. Neelofer, A. Naeem, S. Tasleem, J. Colloid. Interface Sci. 204 (1998) 284. J. Serb. Chem. Soc. 69 (12) 1073-1097 (2004) UDC 536.41:547.262+546.212+547.265 JSCS-3235 Original scientific paper Influence of temperature on the volumetric properties of ethanol + water + 1–pentanol J. M. RESA1, C. GONZALEZ1, J. M. GOENAGA1 and M. IGLESIAS2 1Departamento de Ingeniería Química, Universidad del Pais Vasco, Apto. 450, Vitoria (e-mail: iqpredij@vc.ehu.es) and 2Departament d’Enginyeria Quimica, Escola Tacnica Superior d’Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Campus Sescelades, 43007 Tarragona, Spain (Received 1 March, revised 2 July 2004) Abstract: Knowledge of physical properties and phase equilibria is necessary for the design and optimization of the equipment for the production of distilled alcoholic beverages. In this paper the temperature dependence of the excess molar volumes of the ternary system ethanol + water + 1-pentanol in the temperature range 228.15 – 323.15 K and atmospheric pressure, are presented, due to the importance of 1-pentanol among the flavour compounds contained in this type of beverages. The excess molar volumes are negative over the whole homogeneous composition range, but tend to positive values towards the binaries ethanol + 1-pentanol and water + 1-pentanol. Because the design of current processes is strongly computer oriented, consideration was also given to how accurate the predictions of the SRK equations of state are. Different derived properties were computed due to their importance in the study of specific molecular interactions. Keywords: excess molar volume, temperature, ethanol, water, 1-pentanol, prediction. REFERENCES 1. M. Gaiser, G. M. Bell, A. W. Lim, N. A. Roberts, D. B. F. Faraday, R. A. Schulz, R. Grob, J. Food Eng. 51 (2002) 27 2. J. M. Resa, C. Gonzalez, R. G. Concha, J. M. Goenaga, M. Iglesias, J. Chem. Thermodyn. (2004) (submitted) 3. I. Cibulka, Coll. Czech. Chem. Comm. 47 (1982) 1414 4. J. M. Resa, C. Gonzalez, R. G. Concha, J. M. Goenaga, M. Iglesias, Fluid Phase Equilibr. (2004) (submitted) 5. B. Orge, M. Iglasias, G. Marino, M. Dominguez, M. M. PiZeiro, J. Tojo. Fluid Phase Equililbr. 137 (2000) 151 6. C. Gonzalez, M. Iglesias, J. Lanz, J. M. Resa. Thermochim. Acta 328 (1999) 277 7. D. W. Marquard, J. Soc. Indust. Appl. Math. 11 (1963) 431 8. O. Redlich, A. T. Kister. Ind. Eng. Chem. 40 (1948) 345 9. P. Bevington. Data Reduction and Error Analysis for the Physical Sciences, McGraw-Hill, New York, 1969 10. J. A. Riddick, W. B. Bunger, T.K. Sakano, Organic Solvents. Physical Properties and Methods of Purification, Wiley-Interscience, 1986 11. TRC Thermodynamic Tables; Texas A&M University, College Station, TX 1994. J. Serb. Chem. Soc. 69 (12) 1099–1110 (2004) UDC 546.76+546.226–325+541.13:541.8 JSCS-3236 Original scientific paper Electrochemistry of active chromium. Part IV. Dissolution of chromium in deaerated sulfuric acid D. M. DRA@I]1, J. P. POPI]1#, B. JEGDI]2 and D. VASILJEVI]-RADOVI]3 1ICTM-Center for Electrochemistry, Njego{eva 12, P. O. Box 473, 11001 Belgrade (e-mail: dmdrazic@eunet.yu), 2Technical Military Institute, Katani}eva 14, 11000 Belgrade and 3ICTMCenter for Microelectronic Technologies and Single Crystals, Njego{eva 12, P. O. Box 473, 11001 Belgrade, Serbia and Montenegro (Received 28 May 2004) Abstract: Chromium dissolution in aqueous sulfuric acid solutions in the pH range 0.5 –3 was studied electrochemically by the potentiostatic or very slow potentiodynamic method, and by the analyses of the Cr ion concentrations in the electrolyte formed during the experiments. It was shown that the electrochemical anodic dissolution follows a common Tafel line with a slope of ca. 120 mV dec-1, independent of the solution pH and the hydrodynamics, while the passivation potentials and passivation currents were independent on hydrodynamics but strongly dependent on the pH. In parallel with the electrochemical dissolution, a considerable “anomalous” or chemical Cr dissolution process occurs, as evidenced by the spectrophotometric analyses of the electrolytes for Cr ions after prolonged potentiostating of the electrodes at different potentials, as well as by measuring the electrode weight losses. All these results indicate the existence of a potential independent reaction of Cr dissolution occurring in parallel to the anodic dissolution process. Mechanisms for both the electrochemical and the chemical process are proposed. The consequences of these phenomena on the behavior of some practical systems where chromium or a chromium alloy (e.g., stainless steels) are used are discussed. Keywords: chromium, acid solutions, anodic dissolution, anomalous dissolution, chemical dissolution, reaction mechanisms. REFERENCES 1. D. M. Dra`i}, J. P. Popi}, J. Serb. Chem. Soc. 67 (2002) 777 2. G. T. Burstein, M. A. Kaerns, J. Woodword, Nature 301 (1983) 629 3. D. M. Dra`i}, J. P. Popi}, Corrosion 60 (2004) 297 4. J. P. Popi}, D. M. Dra`i}, Electrochim. Acta 49 (2004) 4877 5. R. M. Lazorenko-Manevich, A. N. Podobaev, Zashch. Metal. 37 (2001) 440 6. D. M. Dra`i} in Modern Aspects of Electrochemistry, Vol. 19, B. E. Conway, J. O’ M. Bockris and R. E. White, Eds., Plenum Press, New York, 1989, p. 126 7. M. Pourbaix, Atlas of Electrochemical Equilibria in Aqueous Solutions, Pergamon Press, New York, 1966, p. 226 8. C. Wagner, W. Traud, Z. Elekektrochem. 44 (1938) 391 9. Ya. M. Kolotyrkin, Z. Elektrohem. 62 (1958) 664 10. Ya. M. Kolotyrkin, G. M. Florianovich, Zashch. Metal. 1 (1965) 7 11. Ya. M. Kolotyrkin, G. M. Florianovich, Elektrokhimiya 9 (1973) 988 12. Ya. M. Kolotyrkin, G. M. Florianovich, Glasnik Hem. Dru{tva Beograd 48 (1983) S125 13. Ya. M. Kolotyrkin, T. R. Agladze, Zashch. Metal. 4 (1967) 413 14. Ya. M. Kolotyrkin, G.M. Florianovich, Zashch. Metal. 30 (1984) 14 15. G. M. Florianovich, Russ. J. Electrochem. 36 (2000) 1037 16. T. Agladze, Russ. J. Electrochem. 36 (2002) 1057 17. W. J. James, in Advances in Corrosion Science and Technology, Vol. 4, M. G. Fontana, R. W. Staehle, Eds., Plenum Press, New York, 1974, p. 85. J. Serb. Chem. Soc. 69 (12) 1111-1120 (2004) UDC 662.791.5+669.22:66.092–977 JSCS-3237 Original scientific paper Investigation of the mechanism of mercury removal from a silver dental amalgam alloy Z. ODANOVI]1 and M. DJURDJEVI]2 1Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000, Belgrade, Serbia and Montenegro (e-mail: odanovic@ptt.yu) and 2University of Windsor, Department for Mechanical and Materials Engineering, Room 209, Essex Hall, 401 Sunset Avenue, Windsor, Ontario, Canada, N9B 3P4 (Received 13 February 2004) Abstract: An investigation of silver dental amalgam decomposition and the mercury removal mechanism was performed. The decomposition process was analysed during thermal treatment in the temperature interval from 400 °C to 850 °C and for times from 0.5 to 7.5 h. The chemical compositions of the silver dental amalgam alloy and the treated alloy were tested and microstructure analysis using optical and scanning electron microscopy was carried out. The phases were identified using energy disperse electron probe microanalysis. A mechanism for the mercury removal process from silver dental amalgam alloy is suggested. Keywords: silver amalgams, mercury removal, thermal treatment. REFERENCES 1. G. Chin, J. Chong, Australian Dental J. 45 (2000) 246 2. D. Brown, Materials World 4 (1996) 259 3. B. K. Norling, G. W. Marshall, Encyclopaedia of Materials Science and Engineering, Pergamon Press, Oxford, 1986, pp. 1047–1056 4. K. H. Lee, M. C. Shin, J. Y. Lee, J. Materials Science 22 (1987) 3949 5. C. L. Reynolds, Appl. Physics, 46 (1975) 568 6. T. Okabe, A. L. Hines, R. F. Hochman, J. Appl. Physics 47 (1976) 49 7. P. G. Boswell, Scripta Metallurgica 13 (1979) 383 8. D. R. Gaskell, Introductin to Metallurgical Thermodynamics, Mc Graw-Hill, NY, 1973, p. 500. J. Serb. Chem. Soc. 69 (12) 1121–1128 (2004) UDC 546.815+546.711+546.24:54.022:667.61 JSCS-3238 Original scientific paper Pb1–xMnxTe single crystals and their structural properties ALEKSANDAR GOLUBOVI], SLOBODANKA NIKOLI],* STEVAN \URI],** and NEBOJ[A ROM^EVI]* *Institute of Physics, Pregrevica 118, P. O. Box 68, 11080 Zemun, **Faculty of Mining and Geology, Dju{ina 7, P. O. Box 162, 11000 Belgrade, Serbia and Montenegro (Received 17 November 2003, revised 23 April 2004) Abstract: Pb1-xMnxTe crystals were grown by the vertical Bridgman method. Their structural properties were observed both by optical microscopy after chemical polishing and ething, and by X-ray powder diffraction analysis. A solution of 5 vol. % Br2 in HBr at room temperatur, for an exposure of 2 min was determined for chemical polishing. A solution of 20 g KOH in 1 ml H2O2, 2 ml glycerol (C3H8O3), and 20 ml H2O at room temperature for an exposure for 6 min was found to be a suitable etching solution. The obtained results are discussed and compared with published data. Keywords: lead manganese telluride, Bridgman method, structural properties, etching, chemical polishing. REFERENCES 1. I. I. Ivanchik, D. R. Khokhlov, A. V. Morozov, A. A. Tereckhov, E. I. Slyn’ko, V. I. Slyn’ko, A. de Visser, W. D. Dobrowolcki, Phys. Rev. B 61 (2000) 14889 2. W. Lo, IEEE J. Quantum Electron QE-13 (1977) 591 3. Y. Yang, W. Li, L. Yu, X. Sun, L. Xu, L. Hou, Infrared Physics&Technology 38 (1997) 9 4. V. Munoz, A. Lasbley, S. Klotz, R. Triboulet, J. Crystal Growth 196 (1999) 71 5. P. Lazarczyk, T. Story, A. J“drzejczak, R. R. Gal•zka, W. Mac, M. Herbich, A. Stachow-Wójcik, J. Mag. Magnetic Mat. 176 (1997) 235 6. T. Story, G. Karczewski, L. Ðwierkowski, R. R. Gal•zka, Phys. Rev. B 42 (1992) 18477 7. M. S. Dresselhaus, G. Dresselhaus, X. Sun, Z. Zhang, S. B. Cronin, T. Koda, J. Y. Ying, Microscale Thermophysical Engeneering 3 (1999) 89 8. D. Khokhlov, I. Ivanchik, A. Kozhanov, A. Morozov, E. Slyn’ko, V. Slyn’ko, W. Dobrowolski, T. Story, Inter. Modern Physics B 16 (2002) 3343 9. O. B. Maksimenko, A. S. Mischenko, J. Physics: Condensed Matter. 9 (1997) 5561 10. W. D. Wilson, R. D. Hatcher, G. J. Dienes, R. Smoluchowski, Phys. Rev. 161 (1967) 888 11. A. I. Lebedev, I. A. Sluchinskaya, V. N. Demin, I. H. Munro, Pis’ma v Zh. Eksp. Teor. Fiz. 63 (1996) 600: [Eng. Trans. JETP Letters 63 (1996)635] 12. D. G. Adrianov, C. A. Belokon’, C. O. Klimonskii, V. M. Lakeenkov, Fiz. tekh. poluprovod. 22 (1988) 670 13. J. Niewodniczanska-Zawadzka, A. Szczerbakow, Solid State Com. 34 (1980) 887 14. A. V. Brodovoi, Fiz. Tekh. Poluprovod. 18 (1984) 1547 [Sov. Phys. Semicon. 18 (1984) 970] 15. J. Neurwith, W. Jantsch, L. Palmetchhofer, W. Zulehner, J. Phys. C 19 (1986) 2475 16. I. I. Zasavickii, A. V. Sazonov, Fiz. Tverd. Tela 30 (1988) 1669 17. M. N. Vinogradova, I. A. Drabkin, Yu. I. Esiejeva, I. V. Nielson, Fiz. tekh. poluprov. 6 (1972) 1478 18. A. Golubovi}, S. Nikoli}, j. Traji}, S. \uri}, N. Rom~evi}, M. Rom~evi}, A. J. Nadolny, B. Taliashvili, V. N. Nikiforov, Mater. Sci. Forum. 453 (2004) 99 19. Z. Korczak, M. Subotowicz, Phys. Stat. Sol. (a) 77 (1983) 497 20. K. Kinoshita, K. Sugii, J. Crystal Growth 71 (1985) 283 21. A. Golubovi}, S. Nikoli}, R. Gaji}, S. \uri}, A. Val~i}, J. Serb. Chem. Soc. 64 (1999) 553 22. A. Golubovi}, R. Gaji}, C. Chen, A. Val~i}, J. Serb. Chem. Soc. 65 (2000) 611 23. A. Golubovi}, S. Nikoli}, S. \uri}, A. Val~i}, J. Serb. Chem. Soc. 66 (2001) 411 24. A. Golubovi}, S. Nikoli}, R. Gaji}, S. \uri}, A. Val~i}, J. Serb. Chem. Soc. 67 (2002) 291 25. M. Yoshikawa, M. Ito, K. Shinohara, R. Ueda, J. Crystal Growth 47 (1979) 230 26. JCPDS 38-1435 27. A. Golubovi}, M. Dragojevi}, V. Blagojevi}, R. Gaji}, J. Serb. Chem. Soc. 57 (1992) 443 28. J. M. Lufinger, Phys. Rev. 112 (1958) 739 29. S. \uri}, Nauka Tehnika Bezbednost 1 (1995) 45 (in Serbian) 30. B. A. Bunker, Y. Wang, Q. Islam, Ferroelectrics 120 (1991) 23 31. S. Miotkowska, J. Kachniarz, E. Dynowska, T. Story, A. J“drzejczak, J. Crystal. Growth 172 (1997) 455 32. W. G. Pfann, Zone Melting, Wiley, NewYork, USA, 1958, pp. 10–13. J. Serb. Chem. Soc. 69 (12) 1129-1144 (2004) UDC 519.87:547.422.22–31:661.183 JSCS-3239 Original scientific paper Modeling of adsorber/desorber/catalytic reactor system for ethylene oxide removal ZORANA LJ. ARSENIJEVI],1, @ELJKO B. GRBAV^I]2 and BO[KO V. GRBI]1 1Institute for Chemistry, Technology and Metallurgy, University of Belgrade, Njego{eva 12, 11000 Belgrade and 2Faculy of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia and Montenegro (Received 16 March 2004) Abstract: The removal of ethylene oxide (EtO) in a combined system adsorber/desorber/catalytic reactor has been investigated. The combined system was a modified draft tube spouted bed reactor loaded with Pt/Al2O3 catalyst. The annular region was divided into two sectons, the “hot” section contained about 7 % of catalyst and it behaved as a desorber and catalytic incinerator, while the “cold” section, with the rest of the catalyst, behaved as a sorber. The catalyst particles were circulated between the two sections by use of a draft tube riser. The Computational Fluid Dynamics (CFD) program package FLUENT was used for simulations of the operation of the combined system. In addition, a one-dimensional numerical model for the operation of the packed bed reactor was compared with the corresponding FLUENT calculations. The results of the FLUENT simulations are in very good agreement with the experimental observations, as well as with the results of the one-dimensional numerical simulations. Keywords: draft tube spouted bed, Pt/Al2O3 catalyst, ethylene oxide removal, adsorber/desorber/catalytic reactor, numerical modeling, CFD modeling. REFERENCES 1. B. Grbi}, Z. Grbav~i}, Z. Saleti}, A. Terlecki-Bari~evi}, V. Joji}, Proceedings the 2nd International Symposium and Exhibittion on Environmental Contamination in Central and Eastern Europe, September 20–23, Budapest, 1994, p. 263 2. B. Grbi}, V. Dondur, D. Jovanovi}, A. Terlecki-Bari~evi}, J. Serb. Chem. Soc. 12 (1993) 1071 3. N. Radi}, B. Grbi}, Z. Jovanovi}, A. Terlecki-Bari~evi}, Z. Arsenijevi}, Proceedings of the 8th International Symposium on Heterogeneous Catalysis, A. Andreev et al. (Eds.), Institute of Catalysis, Bulgarian Academy of Sciences, Sofia, October 5-9, Varna (1996) p. 377 4. B. Grbi}, A. Terlecki-Bari~evi}, @. Arsenijevi}, Z. Grbav~i}, N. Radi}, Hem. Ind. 49 (1995) 322 5. Z. Lj. Arsenijevi}, B. V. Grbi}, Z. B. Grbav~i}, N. D. Radi}, A. V. Terlecki-Bari~evi}, Chem. Eng. Sci. 54 (1999) 1519 6. O. Rentz, “Emissions of Volatile Organic Compounds (VOC) from Stationary Sources and Possibilities of their Control”, ECE VOC Task Force Report No 91-010, Karlsruhe, 1990 7. @. B. Grbav~i}, R. V. Gari}, S. Dj. Jovanovi}, Lj. S. Ro`i}, Powder Technol. 94 (1997) 91 8. D. Handley, P. J. Heggs, Trans. Inst. Chem. Eng. 46 (1968) T251 9. FLUENT, Computational Fluid Dynamics Software (v4.48, 1997), Fluent inc., Lebanon, New Hampshire, USA. J. Serb. Chem. Soc. 69 (12) 1145–1151 (2004) UDC 669.4+669.73+504.53:54.05:669 JSCS-3240 Original scientific paper The correlation of the values of plant-avalilable Pb and Cd in soil determined using different types of extragens ANKICA SAVIN,1 DRAGAN VESELINOVI],2 and DRAGAN MARKOVI]2 1Bio-Ecological Centre, P. Drap{ina 15, 23000 Zrenjanin, 2Faculty of Physical Chemistry, Studentski trg, 12–16, P. O. Box 137, 11000 Belgrade, Serbia and Montenegro (Received 19 February, revised 8 June 2004) Abstract: The plant-available amount of Pb and Cd in soil was determined by extraction using the solutions: 1) 0.5 M Na2EDTA, pH 5.2; 2) 1 M KCl, pH 7.0; 3) 0.1 M KCl, 0.05 M Na2EDTA, pH 6.2; 4) 2 % CH3COOH, pH 2.5 and 5) 1 M CH3COONH4, pH 4.8. Chernozem and hydromorphic black soil types from the Middle Banat were used. It can be concluded that the values of the plant-available amounts of Pb and Cd in a soil depends on the stability constants of their complexes with ligands in the extraction solution. The conversion factors for the recalculation of the amounts of Pb and Cd obtained using the citted extractants have been calculated. Keywords: lead, cadmium, soil, metal extraction. REFERENCES 1. P. R. Hesse, A Textbook of Soil Chemical Analysis, John Murray Ltd, London 1971, pp. 371–377, 388 2. R. Kastory, Heavy metals and pesticides in soil, Faculty of Agriculture, Novi Sad, 1993, p. 17 (in Serbian) 3. D. Veselinovi}, A. Savin, M. Gojkov, S. Filip, M. Milovac, 2nd International Conference, Halkidiki, Association Greek Chemists, Athens, 2000, Book of Abstracts I, p. 126 4. N. Vu~i}, Soil Hygiene, Vojvodina Academy of Sciences, Novi Sad, 1992, pp. 75–102 (in Serbian) 5. M. Jakovljevi}, S. Blagojevi}, D. Stevanovi}, Lj. Martinovi}, IX Congress, Yugoslav Society for Soil Investigations, Novi Sad, 1997, Abstract p. 181 (in Serbian) 6. N. Vu~i}, Water, Air and Thermal Regime of Soil, Vojvodina Academy of Sciences, Novi Sad, 1987, pp. 15–35 (in Serbian) 7. K. Eckaschlager, Error Measurements and Results in Chemical Analysis, Van Nostrand Reinhold Comp., London, 1969, pp. 76–130 8. Lange’s Handbook of Chemistry, McGraw Hill, New York, 1973 9. L. G. Sillen, A. E. Martel, Stability Constants, Special Publicaton No. 17, The Chemical Sociey, London, 1974 10. R. Kastori, Heavy Metals in the Environment, Research Institute of Field and Vegetable Crops, Novi Sad, 1997, pp. 95–152, (in Serbian) 11. Lj. Kova~evi}, D. Veselinovi}, I Regional Symposium: Chemistry and the Environment, Vrnja~ka Banja, Serbian Chemical Society, Beograd, 1995, Proceedings, pp. 471–474. J. Serb. Chem. Soc. 69 (12) 1153–1155 (2004) UDC 549.781.004.55+504.3:543.4 JSCS-3241 Note NOTE Depleted uranium in the air during the cleanup operations at Cape Arza MIRJANA RADENKOVI],1, TOMISLAV ANDJELI],2 MILOJKO KOVA^EVI],1 and PERKO VUKOTI]3 1Vin~a Institute of Nuclear Sciences , P. O. Box 522, 11001 Belgrade, 2Center for Eco-toxicological Research of Montenegro, Put R. Ivanovi}a 2, 81001 Podgorica and 3Faculty of Mathematics and Science, University of Podgorica, P. O. Box 211, 81001 Podgorica, Serbia and Montenegro (e-mail: mirar@vin.bg.ac.yu) (Received 22 April 2004) Abstract. Cape Arza was contaminated with depleted uranium (DU) in the air strikes of NATO aeroplanes on May 30, 1999. The cleanup and decontamination of the site started in 2001. Here the results of air monitoring performed during the cleanup operations in Spring 2002. are presented. The collected air samples were analyzed by high-resolution alpha spectrometry. The obtained concentrations of airborne uranium are about ten times higher than the average value usually reported for air. The ratio of the 234U/238U activities indicates the presence of depleted uranium in the air during the cleanup action, due to resuspension and soil disturbance in the contaminated teritory. Keywords: air, depleted uranium, alpha-spectrometry. REFERENCES 1. Depleted Uranium in Serbia and Montenegro, Post-conflict Environmental Assessment, UNEP, Geneva, 2002, p. 70, 153, 134. 2. P. Vukoti}, T. Andjeli}, R. Zeki}, M. Kova~evi}, V. Vasi}, N. Risti}, Nucl. Techn. Rad. Prot. 18 (2003)1 3. Annual Book of ASTM Standards, C1000-90, 12.01(1999) 4. M. Radenkovi}, D. Vukovi}, V. [ipka, D. Todorovi}, J. Radioanal. Nucl. Chem. 208 (1996) 467 5. N. A. Talvite, Anal. Chem. 44 (1972) 280 6. Depleted Uranium, Sources, Exposure and Health Effects, World Health Organization, Geneva, 2001. J.Serb.Chem.Soc. 69 (12) 1157–1164 (2004) CONTENTS OF VOLUME 69 NUMBER 1 Organic Chemistry and Biochemistry A. Yusufo—lu, H. Çelik and F. G. KirbaÕlar: Utilization of Lavandula angustifolia Miller extracts as natural repellents, pharamaceutical and industrial auxiliaries 1 S. [eatovi}, Lj. Gligi}, @. Radulovi} and R. M. Jankov: Purification and partial characterization of superoxide dismutase from the thermophilic bacteria Thermotrix sp. 9 Inorganic Chemistry G. Vu~kovi}, Z. M. Midoragovi} and S. Tanaskovi}: Preparation and properties of Cu(II) complexes with N,N’,N”,N’’’-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane (tpmc) and pseudohalides (NCOor NCSe-). Part II 17 Physical Chemistry S. Zor: Investigation of the adsorption of anionic surfactants at different pH values by means of active carbon and the kinetics of adsorption 25 Electrochemistry L. Li, Sh. Chen, H. Wu and H. Cui: Chaotic, mixed-mode and periodic oscillations during electro-oxidation of copper in trichloroacetic acid 33 Materials K. I. Popov, S. B. Krsti}, M. ^. Obradovi}, M. G. Pavlovi}, Lj. J. Pavlovi} and E. R. Ivanovi}: The effect of the particle shape and structure on the flowability of electrolytic copper powder. III. A model of the surface of a representative particle of flowing copper powder electrodeposited by reversing current 43 I. Rusu, M.-L. Craus, D. Sutiman and A. Rusu: On the possible formation of Aurivillius phases in the oxide system Bi2O3 – ZnO – Nb2O5 53 A. Vu~kovi}, S. Bo{kovi} and Lj. @ivkovi}: Synthesis of in situ reinforced silicon nitride composites 59 Analytical Chemistry Lj. Petrovi}, V. Piperski, S. Risti}, J. Tasi}, V. Matovi} and M. Jokanovi}: HPLC methods for the determination of acetyl- and benzoyl-tiazofurin in rat plasma 69 Chemical Engineering N. M. Nika~evi}, A. P. Dudukovi} and Z. J. Predojevi}: Dynamic holdup in countercurrent gas – flowing solids – packed bed contactors 77 NUMBER 2 Organic Chemistry D. @. Mijin, V. D. Jankovi} and S. D. Petrovi}: Alkylation of N-substituted 2-phenylacetamides: Benzylation of N-(4-chlorophenyl)-2-phenylacetamide 85 D. Lo{i}, K. Short, J. J. Gooding and J. G. Shapter: Scanning probe microscopy characterization of immobilised enzyme molecules on a biosensor surface: visualisation of individual molecules 93 D. Z. Markovi}: Photochemistry of aromatic ketones in sodium dodecyl sulphate micelles in the presence of unsaturated fatty acids 107 V. Popsavin, Lj. Radi}, M. Popsavin and V. ]irin-Novta: Unexpected cycloreversion of a tosylated sugar oxetane under E2 conditions. The facile formation of 2-(2-furanyl)-1,3-dioxolane from a novel 2,5:4,6dianhydro-L-idose derivative (Preliminary communication) 117 Inorganic Chemistry N. Bicer, R. Gürkan, M. Akcay and T. Altunata: Investigation of Pd-catalysed Co(III)EDTA/hypophosphite inhibition. Reaction kinetics, mechanism and the evaluation of its analytical application possibilities 123 Z. Leka, S. A. Gruji}, @. Te{i}, S. Luki}, S. Skuban and S. Trifunovi}: The synthesis and characterization of complexes of zinc(II), cadmium(II), platinum(II) and palladium(II) with potassium 3-dithiocarboxy-3aza-5-amino-pentanoate 137 S. Brezovska, B. Marina, B. Panova, D. Burevski, V. Bosevska and L. Stojanovska: The adsorption characteristics and porous structure of bentonite adsorbents, determined from the adsorption isotherms of benzene vapor 145 Electrochemistry B. M. Jovi} and V. D. Jovi}: Electrochemical formation and characterization of Ag2O 153 Materials G. Markovi}, B. Radovanovi}, J. Budinski-Simendi} and M. Marinovi}-Cincovi}: Thermostability and surface morphology of nano- and micro-filled NBR/CSM rubber blends 167 NUMBER 3 Organic Chemistry P. Zhong and X. Huang: Stereoselective synthesis of (E)-vinyl alkyl sulfides via hydrozirconation of terminal alkynes 175 Inorganic Chemistry N. Raji}, Dj. Stojakovi}, D. Han`el and V. Kau~i~: The structure directing role of 1,3-diaminopropane in the hydrothermal synthesis of iron(III) phosphate 179 S. B. Tanaskovi} and G. Vu~kovi}: The preparation and characterization of Cu(II) complexes with N,N’,N",N’’’-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane and 2,6-diacetylpyridine bis (semi/thiosemicarbazone) 187 W. Ferenc, B. Bocian and A. Walkow-Dziewulska: Spectroscopic, magnetic and thermal behaviour of the 2,3,4-trimethoxybenzoates of heavy lanthanides(III) and yttrium(III) 195 Physical Chemistry P. I. Premovi}, N. D. Nikoli}, M. S. Pavlovi} and K. I. Panov: Geochemistry of the Cretaceous-Tertiary transition boundary at Blake Nose (N. W. Atlantic): Cosmogenic Ni 205 G. Popovi} and M. ^akar: The effect of b-cyclodextrin and pH on bifonazole hydrosolubility 225 J. D. Jovanovi} and D. K. Grozdani}: Saturated-liquid heat capacity of organic compounds: New empirical correlation model (Note) 233 Materials M. S. Lazi}, K. Simovi}, V. B. Mi{kovi}-Stankovi}, P. Jovani} and D. Ki}evi}: The influence of the deposition parameters on the porosity of thin alumina films on steel 239 NUMBER 4 Organic Chemistry R. Markovi}, M. Baranac and Z. D`ambaski: Facile rearrangement of push-pull 5-substituted 4oxothiazolidines induced by pyridinium hydrobromide perbromide under homogeneous reaction conditions 239 M. Kidwai and A. D. Mishra: An expeditious synthesis of 3,4-dihydro-benzo[2,3-d]pyrimidines using inorganic solid supports 247 Inorganic Chemistry M. G. Abd El Wahed, S. Abd El Wanees, M. El Gamel and S. Abd El Haleem: Physico-chemical studies of some aminobenzoic acid hydrazide complexes 255 Physical Chemistry I. Gutman, B. Furtula, B. Arsi} and @. Bo{kovi}: On the relation between Zenkevich and Wiener indices of alkanes 265 A. Radosavljevi}-Mihajlovi}, V. Dondur, A. Dakovi}, J. Lemi} and M. Toma{evi}-^anovi}: Physicochemical and structural characteristics of HEU-type zeolitic tuff treated by hydrochloric acid 273 B. M. Sargar, M. M. Rajmane and M. A. Anuse: Selective liquid–liquid extraction of antimony(III) from hydrochloric acid media by N-n-octylaniline in xylene 283 M. G. Antov, D. M. Peri~in and S. N. Pejin: Pectinases partitioning in aqueous two-phase systems: an integration of the systems poly(ethylene glycol)crude dextran and poly(ethylene glycol)ammonium sulphate 299 Analytical Chemistry V. Vasi}, J. Savi} and N. Vukeli}: Sorption-spectrophotometric method for the determination of Pd(II) in aqueous solutions 309 NUMBER 5 Organic Chemistry and Biochemistry S. Sukdolak, S. Soluji}, N. Vukovi}, N. Manojlovi} and Lj. Krsti}: Synthesis of some 3-(thiazol-4-yl)-4hydroxy coumarines 319 R. G. Patel, M. P. Patel and R. G. Patel: Synthesis and characterization of chromogenic fluoran compounds containing 4-keto-quinazolinone moieties 327 G. M. Xia, P. Lu and G. B. Xu: Synthesis, as well as linear and nonlinear fluorescence properties of 5,5’bis(4-N-carbazolylstyryl)-2,2’-bithiophene 335 D. Stani}, M. Nikoli} and V. Niketi}: Covalent glycoinositolphospholipid (GPI) binding to hemoglobin is associated with insulin-activation of erythrocyte membrane protease 343 V. ]irin-Novta, K. Kuhajda, J. Kandra~ and S. Kevre{an: Synthesis of 3a,12a-dihydroxy-23a,23b-dihomo5b-cholan-24-oic acid (Note) 349 Inorganic Chemistry J. Rogan, D. Poleti and Lj. Karanovi}: Crystal structure of a new zigzag chain Cu(II) complex with terephthalato and 1,10-phenonthroline ligands, [Cu(C8H4O4)(C12H8N2)(H2O) ]n 353 Physical Chemistry J. Barkauskas and M. Dervinyte: Investigation of the functional groups on the surface of activated carbons 363 S. Ra`i}, I. Holclajtner-Antunovi} and M. Todorovi}: The influence of ethanol addition on the spatial emission distribution of traces in a vertical argon stabilized DC arc plasma 377 R. F. de Farias, S. Alves Jr., M. F. Belian, M. R. S. Vieira, J. M. de Souza, G. G. Pedrosa and G. F. de Sá: Spectroscopic study of the Eu(fod)3 complex adsorbed on a 3-trimethoxypropylthioethylamine modified silica surface 387 Analytical Chemistry S. Tautkus, L. Steponeniene and R. Kazlauskas: Determination of iron in natural and mineral waters by flame atomic absorption spectrometry 393 K. Basavaiah and H. C. Prameela: Quantitative determination of perfloxacin mesylate by residual-base neutralisation method 403 Book Review V. Jovi}: Fundamental Aspects of Electrocmetallurgy, by K. I. Popov, S. S. Djoki} and B. N. Grgur 411 NUMBER 6 Organic Chemistry N. Krsti}, M. S. Bjelakovi}, M. M. Dabovi}, Lj. B. Lorenc and V. D. Pavlovi}: Photochemical and Beckmann rearrangement of (Z)-cholest-4-en-6-one oxime 413 A. N. Pankratov, O. V. Fedotova, A. V. Barabanova, T. V. Alyonkina and Yu. Yu. Eliseev: Regioselectivity of the bromination of 1-oxo-1,2,3,4-tetrahydronaphthalene and 6,7-dimethyl-1-oxo1,2,3,4-tetrahydronaphthalene, and thiabiscyclanones synthesis on their basis 421 A. N. Pankratov and B. I. Drevko: An approach to quantum chemical consideration of "hydride" transfer reaction 431 Polymers E. D`unovi}, S. Tasi}, B. Bo`i}, D. Babi} and B. Dunji}: Dynamical mechanical analysis of photocrosslinked hyperbranched urethane acrylates 441 A. Nastasovi}, S. Jovanovi}, D. Jakovljevi}, S. Stankovi} and A. Onjia: Noble metal binding on macroporous poly(GMA-co-EGDMA) modified with ethylenediamine 455 Physical Chemistry A. Touriño, M. Hervello, V. Moreno, G. Marino and M. Iglesias: Change of refractive indices in ternary mixtures containing chlorobenzene + n-hexane + (n-heptane or n-octane) at 298.15 K 461 Analytical Chemistry D. A. Kosti}, S. S. Miti} and G. @. Mileti}: Kinetic determination of morin nanoamounts 477 Z. Kori}anac, T. Jovanovi}, J. Petkovi} and D. Mini}: Spectrophotometric investigation of famotidinePd(II) complex and its analytical application in drug analysis 485 Materials A. Golubovi}, R. Gaji}, I. Hini} and A. Val~i}: Phonon anomalies in optical spectra of LnNbO3 single crystals 493 Book review I. Gutman: Chemistry and Mathematics: Two Scientific Languages of the 21st Century 503 FECS News European Analytical Column No. 32 507 NUMBER 7 Organic Chemistry and Biochemistry M. D. Ivanovi}, I. V. Mi}ovi}, S. Vu~kovi}, M. Prostran, Z. Todorovi}, V. D. Kricojevi}, J. B. Djordjevi} and Lj. Do{en-Mi}ovi}: The synthesis and preliminary pharmacological evaluation of racemic cis and trans 3-alkylfentanyl analogues 511 F. H. Havaldar, S. Bhise and S. Burudkar: A facile synthesis of 10-methoxy-4.8-dinitro-6H-benzo[2,3c]chromen-6-one 527 N. Dj. Polovi}, T. D. ]irkovi} Veli~kovi}, M. Dj. Gavrovi}-Jankulovi}, L. Burazer, D. Djergovi}-Petrovi}, O. Vu~kovi} and R. M. Jankov: IgG binding of mugwort pollen allergens and allergoids exposed to simulated gastrointestinal conditions measured by a self-developed ELISA test 533 Lj. Vujisi}, D. Krsti}, K. Krinulovi} and V. Vasi}: Influence of transition and heavy metal ions on ATPases activity in rat synaptic plasma membranes (Short communication) 541 Physical Chemistry V. Brankov, D. Stevanovi} and I. Gutman: Equienergetic chemical trees 549 P. I. Premovi}: Cretaceous-Tertiary boundary deposits in Denmark: A diachroneity 555 I.-C. Marcu and I. S|ndulescu: Study of sulfur dioxide adsorption on Y zeolite 563 Analytical Chemistry M. Nikolova, R. Gevrenova and S. Ivancheva: High-performance liquid chromatographic separation of surface flavonoid aglycones in Artemistia annua L. and Artemisia vulgaris L. 571 R. S. Nikoli}, B. M. Kali~anin and G. M. Nikoli}: Potentiometric stripping analysis of lead and cadmium leaching from dental prosthetic materials and teeth 575 Chemical Engineering Lj. B. Nikoli}, V. D. Nikoli}, V. B. Veljkovi}, M. L. Lazi} and D. U. Skala: Axial dispersion of the liquid phase on a three-phase Karr reciprocating plate column 581 NUMBER 8–9 Organic Chemistry and Biochemistry J. B. Nikoli}, G. S. U{}umli}, and V. V. Krsti}: The influence of the solvent on organic reactivity. Part II. Hydroxylic solvent effects on the reaction rates of diazodiphenylmethane with 2-(2-substituted cyclohex-1enyl)acetic and 2-(2-substituted phenyl)acetic acids 601 A. [ainovi}, K. Stojanovi}, I. Filipovi}, O. Cvetkovi}, B. Jovan~i}evi} and D. Vitorovi}: Interpretation of Serbian surface sediment maturation parameters based on factor analysis 611 M. Rakin, J. Baras, M. Vuka{inovi} and M. Maksimovi}: The examination of parameters for lactic acid fermentation and nutritive value of fermented juice of beetroot, carrot and brewer’s yeast autolysate 625 D. Patel, R. Kumar and S. Prasad: Variation in the chemical constituents of soybean due to the industrial pollution (Short communication) 635 Inorganic Chemistry F. Rafat, M. Y. Siddiqi and K. S. Siddiqi: Synthesis and characterization of Ni(II), Cu(II) and Co(III) complexes with polyamine-containing macrocycles bearing an aminoethyl pendant arm 641 K. Andjelkovi}, G. Jakovljevi}, M. Zlatovi}, @. Te{i}, D. Sladi}, J. Howing and R. Tellgren: Synthesis and characterization of zinc(II), palladium(II) and platinum(II) complexes with 2’-[1-(2-pyridinyl)ethylidene]oxamohydrazide. The crystal structure of bis{2'-[1-(2pyridinyl)ethylideneoxamohydrazido}zinc(II) trihydrate 651 R. N. Prasad, M. Agrawal and S. Malhotra: Ca(II) complexes of tetraazamacrocycles derived from 3,4hexenedione and diaminoalkanes 661 Physical Chemistry M. Bilgin: Isobaric vapour-liquid equilibrium calculations of binary systems using neural network 669 G.-X. Sun, Y. Cui, Zh.-W. Zhang, R.-Q. Xu, R.-T. Jiang and S.-X. Sun: The effect of diluents on the extraction of Sm(III) using N,N,N’,N’–tetrabutylmalonamide 675 J. L. Vu~ina, D. M. Luki} and M. M. Stoiljkovi}: Separation of tungsten and rhenium on alumina 683 Electrochemistry H. Kiliç and M. L. Berkem: Electrochemical behavior of some new pyrimidine derivatives 689 Materials B. Matovi} and S. Bo{kovi}: Thermal conductivity of pressureless sintered Si3N4 ceramics with Liexchanged zeolite 705 NUMBER 10 Organic Chemistry D. @. Mijin, M. M. Mi{i}-Vukovi} and S. D. Petrovi}: Alkylation of N-substituted-2-phenylacetamides (Review) 711 G. Petrovi}, R. N. Sai~i}, Lj. Do{en-Mi}ovi} and @. ^ekovi}: Stereoselective free radical phenylsulfenylation of a nonactivated d-carbon atom 737 S. Sinadinovi}-Fi{er and J. Jovanovi}: MS analysis of biindenylidenes 749 D. @. Mijin and D. G. Antonovi}: Temperature dependence of the Kovats retention indices for alkyl 1,3diketones on a DB-5 capillary column 759 T. Kop, G. Pocsfalvi and B. [olaja: Synthesis of a steroidal dendrimer core (Preliminary communication) 769 Physical Chemistry I. Gutman, D. Stevanovi}, S. Radenkovi}, S. Milosavljevi} and N. Cmiljanovi}: Dependence of the total pelectron energy on large number of non-bonding molecular orbitals 777 L. Luo, H. Zhong and X. Yang: Oxidative performance and surface properties of Co-containaing mixed oxides having the K2NiF4 structure 783 Electrochemistry G. Li, H. Ma, Y. Jiao and S. Chen: An impedance investigation of corrosion protection of copper by selfassembled monolayers of alkanethiols in aqueous solution 791 J. B. Bajat, V. B. Mi{kovi}-Stankovi}, M. D. Maksimovi}, D. M. Dra`i} and S. Zec: Electrochemical deposition and characterization of Zn–Fe alloys 807 Materials K. I. Popov, S. B. Krsti}, M. G. Pavlovi}, Lj. J. Pavlovi} and V. M. Maksimovi}: The effect of the particle shape and structure on the flowability of electrolytic copper powder. IV. The internal structure of the powder particles 817 Chemical Engineering M. Kijev~anin, B. Djordjevi}, O. Oci}, M. Crnomarkovi}, M. Mari} and S. [erbanovi}: Energy and economy savings in the process of methanol synthesis unsig Pinch technology 827 NUMBER 11 D. Vitorovi}: Professor @ivorad M. ^ekovi}. On the occasion of his 70th birthday 839 Organic and Biomolecular Chemistry Lj. Do{en-Mi}ovi}: Molecular modelling of fentanyl analogs (Review) 843 B. Mu{icki, A. M. Periers, N. Tessot and M. Klich: Synthesis of the 4’-desmethoxy analogue of RU79115 (Short communication) 855 V. D. Pavlovi}, M. M. Dabovi}, S. Martinovi}, Lj. B. Lorenc and J. Kalvoda: Synthesis of 5azaandrostane-3b,17b-diol protected at the 17b-hydroxyl group 861 M. Stojanovi}: Allosteric regulation of small-molecule binding by aptimers (Short communication) 871 Z. Markovi}, D. Bajduk and I. Gutman: Geometry and conformation of benzenecarboxylic acids 877 D. Godjevac, V. Vajs, N. Menkovi}, V. Te{evi}, P. Jana}kovi} and S. Milosavljevi}: Flavonoids from flowers of Cephalaria pastricenis and their antiradical activity (Short communication) 883 T. W. Johnson and N. Kosti}: Steric effects on the rate of hydrolysis by palladium(II) complexes of the Cterminal amide bond in a series of methionine-containing dipeptides AcMet-Aa 887 D. Sladi}, I. Novakovi}, Z. Vuj~i}, T. Bo`i}, N. Bo`i}, D. Mili}, B. [olaja and M. J. Ga{i}: Protein covalent modification of biologically active quinones 901 R. Markovi}, A. Ra{ovi}, M. Baranac, M. Stojanovi}, P. Steel and S. Joveti}: Thionation of N-methyl- and N-unsubstituted thiazolidine enaminones 909 I. Opsenica, N. Terzi}, D. Opsenica, W. K. Milhous and B. [olaja: 7,8,15,16-Tetraoxadispiro[5.2.5.2]hexadecane-3-carboxylic acid derivatives and their antimalarial activity (Preliminary communication) 919 S. Bajc, A. Amblès and D. Vitorovi}: Preserved precursors in Pumpherston shale ketogen revealed by oxidative degradation 923 S. Milisavljevi} and R. D. Vuki}evi}: Electrochemical chlorination of some 5-unsaturated steroids 941 B. @. Jovanovi}, F. H. Assaleh and A. D. Marinkovi}: Kinetics of the reaction of 5-substituted orotic acids with diazodiphenylmethane (Short communication) 949 M. D. Ivanovi}, I. V. Mi}ovi} , S. Vu~kovi}, M. Prostran, Z. Todorovi}, E. R. Ivanovi}, V. D. Kiricojevi}, J. B. Djordjevi} and Lj. Do{en-Mi}ovi}: The synthesis and pharmacological evaluation of(±)-2,3-seco-fentanyl analogues 955 V. Vajs, S. Trifunovi}, P. Jana}kovi}, M. Sokovi}, S. Milosavljevi} and V. Te{evi}: Antifungal activity of davanone-type sesquiterpenes from Artemisia lobelli var. conescens (Short communication) 969 S. R. Milovanovi}, Z. Ore{~anin, S. Spasi}, S. Mileti}, M. Prostran and M. B. Spasi}: Effect of MnSOD (E. coli) on the relaxation caused by sodium nitroprusside on isolated rat renal artery 973 G. Tasi}, R. Matovi} and R. N. Sai~i}: Stereoselective synthesis of a-hydroxy-b-amino acids: the chiral pool approach 981 NUMBER 12 Organic Chemistry and Biochemistry Y. Vaghasiya, R. Nair, M. Soni, S. Baluja and S. Shanda: Synthesis, structural determination and antibacterial activity of compounds derived from vanillin and 4-aminoantipyrine 991 A. Ni}iforovi}, M. B. Radoj~i} and B. H. Milosavljevi}: Gamma-radiation induced agglomeration of chicken muscle myosin and actine 999 R. M. Radoji~i}, S. D. Spasi}, Z. S. Sai~i}, T. B. Jovanovi} and J. B. Simi}-Krsti}: Superoxide dismutase activity as a function of culture aging of B-16 mouse melanoma cells (Preliminary communication) 1005 Polymers D. Jovanovi}, M. S. Nikoli} and J. Djonlagi}: Synthesis and characterization of biodegradable aliphatic copolyesters with hydrophilic soft segments 1013 Z. Ka~arevi}-Popovi}, D. Kostoski, Lj.Novakovi}, N. Miljevi} and B. [e}erov: Influence of the irradiation conditions on the effect of radiation on polyethylene 1029 G. Ilia, E. Fagadar-Cosma, A. Popa and S. Iliesku: Styrene-divinylbenzene copolymer grafted with phosphonic acid dialkyl esters 1043 Inorganic Chemistry J. Husárek, R. Pstorek, M. MaloÁ, Z. [indaláÍ and M. Pavlí~ek: Nicke(II) cyclohexylethyl-dithiocarbamate P-donor ligands in the coordination sphere 1053 Physical Chemistry @. N. Todorovi} and S. K. Milonji}: Determination of intrinsic equilibrium constants at alumina/electrolyte interface 1063 J. M. Resa, C. Gonzáles, J. M. Goenaga and M. Iglesias: Influence of temperature on the volumetric properties of ethanol + water + 1-pentanol 1073 Electrochemistry D. M. Dra`i}, J. P. Popi}, B. Jegdi} and D. Vasiljevi}-Radovi}: Electrochemistry of active chromium. Part IV. Dissolution of chromium in deaerated sulfuric acid 1099 Materials Z. Odanovi} and M. Djurdjevi}: Investigation of the mechanism of mercury removal from silver-amalgam alloy 1111 A. Golubovi}, S. Nikoli}, S. Djuri} and N. Rom~evi}: Pb1-xMnxTe single crystals and their structural properties 1121 Chemical Engineering @. Lj. Arsenijevi}, @. B. Grbav~i} and B. V. Grbi}: Modeling of adsorber/desorber/catalytic reactor system for ethylene oxide removal 1129 Environmental Chemistry A. Savin, D. Veselinovi} and D. Markovi}: The correlation of the values of plant-available lead and cadmium in soil determined using different types of extragents 1145 M. Radenkovi}, T. Andjeli}, M. Kova~evi} and P. Vukoti}: Depleted uranium in the air during the cleanup operation at Cape Arza 1153 Contents of Volume 69 1157 Subject index 1165 Author index 1169 J.Serb.Chem.Soc. 69 (12) 1165–1167 (2004) Subject index Activated carbon, functional groups, 363 Ag2O, electrochemical formation and characterization of, 153 3-Alkylfentanyl analogues, 511 Alumina films, cataphoretic deposition, deposition parameters, image analysis, porosity, 239 Alumina, surface properties, 1063 Aminobenzoic acid hydrazide complexes, 255 Antimony(III), solvent extraction, 283 Aptamers, allosteric regulation, 871 Artemisia annua, Artemisia vulgaris, HPLC, 571 Artemisia lobelii var. conescens, sesquiterpenes, 969 Aurivillius phases formation of, oxide system Bi2O5–ZnO–Nb2O5, 53 5-Azasteroids, synthesis, 861 Bentonite adsorbents, 143 Benzenecarboxylic acids, 877 Benzylation of N-(4-chlorophenyl)-2-phenylacetamide, 85 Bifonazole, acidity constant, solubility, b-cyclodextrin, 225 Biodegradable aliphatic copolyesters, 1013 5,5’-Bis(4-N-carbazolylstyryl)-2,2’-bithiophene, synthesis and properties of, 335 Bromination, regioselectivity, 421 Ca(II) complexes of tetraazamacrocycles, 661 Cephalaria pastricensis, flavonoids, antiradical activity, 883 (Z)-Cholest-4-en-6-one oxime, photochemical and Beckmann rearrangement of, 413 Chromium, electrochemistry of, 1099 Chromogenic fluoran compounds containing 4-ketoquinazolinone moieties, synthesis and characterization of, 327 Co-based mixed oxides, 783 Co(III)-EDTA/hypophosphite, inhibition kinetics, 123 Copper(II) complexes, octaazamacrocycle, isocyanato ligand, isoselenocyanato ligand, antimicrobial activity, 17 Copper(II) complexes, terephthalate ions, 1,10-phenanthroline, 353 Copper powder flowability, 43, 817 Cu(II) complexes, tpmc, 2,6-diacetylpyridine bis(semi/thiosemicarbazones), 187 Depleted uranium, air, 1153 4’-Desmetoxy analogue of RU79115, 855 Diachroneity, kerogen, copper(II) porphyrins, Cretaceous-Tertiary, Fiskeler, boundary clay, 555 3,4-Dihydrobenzo[2,3-d]pyrimidines, synthesis of, 247 3a,12a-Dihydroxy-23a,23b-dihomo-5b-cholan-24-oic acid, synthesis of, 349 Dynamic holdup in a countercurrent gas – flowing solids – packed bed contactors, 84 Electrochemical behavior of some new pyrimidine derivatives, 689 Electrochemical chlorination, 5-unsaturated steroids, 941 Electrometallurgy, fundamental aspects of, 411 Electro-oxidation of copper in trichloroacetic acid, 33 Energy recovery, pinch technology, 827 Equienergetic chemical trees, 549 Essential oils in Lavandula angustifolia Miller, 1 Ethylene oxide removal, 1129 Eu(fod)3 complex, spectroscopic study of, 387 (E)-vinyl alkyl sulfides Stereoselective synthesis of, 175 Famotidine-Pd(II) complex, 485 Fentanyl analogs, molecular modeling of, 843 2-(2-Furanyl)-1,3-dioxolane, formation of, 117 Glycoinositolphospholipid, insulin, hemoglobin, 343 Heat capacity, saturated liquid, correlation, 233 Heavy lanthanides(III), yttrium(III), complexes of 2,3,4-trimethoxybenzoic acid, 195 HEU-type zeolite, physicochemical and structural characteristics of, 273 HPLC methods for the determinatiuon of acetyl- and benzoyl-tiazofurin, 69 Hydride transfer reactions, 431 Hydrolysis of C-terminal amide bond, 887 Hydrothermal synthesis of iron(III) phosphate, structure directing role of 1,3-diaminopropane, 179 a-Hydroxy-b-amino acids, stereoselective synthesis of, 981 Immobilised enzyme molecules on a biosensor surface, characterisation of, 93 Influence of the solvent on organic reactivity, 601 Iron determination, flame atomic absorption spectrometry, 393 Isobaric vapour–liquid equilibrium calculations of binary systems, 669 Karr reciprocating plate column, 581 Kerogen, Pumpherston shale, oxidative degradation, 923 Kovats retention indices, alkyl 1,3-diketones, 759 Lactic acid fermentation, 625 Litium niobate, phonon anomalies, 493 Lead, cadmium, soil, metal extraction, 1145 Lead manganese telluride, 1121 Macroporous poly(GMA-co-EGDMA), modification, 455 Mass spectrometry, biindenylidenes, 749 10-Methoxy-4,8-dinitro-6H-benzothieno[2,3-c]chromen-6-one, synthesis of, 527 Mixed tetraoxane, malaria, Plasmodium falciparum, 919 Morin, kinetic determination of, 477 Myosin, actin, gamma rays effect on, 999 Nano- and micro- particle size of SiO2 filled NBR/CSM and CR/CSM crosslinked systems, 167 Nickel, Cretaceous-Tertiary boundary, ODP, Blake Nose Plateau, 205 Nickel(II) cyclohexylethyldithiocarbamate, 1053 Ni(II), Cu(II) and Co(III) complexes with polyamine-containing macrocycles, 641 N-substituted 2-phenylacetamides, alkylation of, 711 Open-chain fentanyl analogues, 955 Orotic acids, diazodiphenylmethane, 949 Pectinases, partitioning in aqueous two-phase system, 299 Pefloxacin, determination, 403 Photochemistry of aromatic ketones, 107 Polyethylene, 1029 Potentiometric stripping analysis of lead and cadmium leaching, 575 Quinones, covalent modification, 901 Radical reactions, radical phenylsulfenylation, 737 Refractive index, 461 Self-assembled monolayers (SAMs), alkanethiol, corrosion protection, 791 Schiff bases, antibacterial activity, 991 Silver amalgams, mercury removal, 1111 Simulated gastrointestinal conditions, Artemisia vulgaris, 533 Si3N4 ceramics, 705 b-Si3N4 seeds, additive, 59 Sm(III), extraction using N,N,N’,N’-tetrabutylmalonamide, 675 Sodium nitroprusside, manganese superoxide dismutase, 973 Sorption-spectrophotometric method, determination of Pd(II) in aqueous solutions, 309 Soybean, chemical constituents of, 635 Steroidal dendrimer core, synthesis of, 769 Styrene-divinylbenzene copolymer, 1043 Sulfur dioxide adsorption on Y zeolite, 563 Superoxide dismutase, 1005 Superoxide dismutase from the thermophilic bacteria Thermothrix sp., 9 Surface sediments, maturation parameters based on factor analysis, 611 Surfactant, active carbon, adsorption kinetics, 25 Thiazolidine, rearrangement induced by pyridinium hydrobromide perbromide, 239 Thiazolidine, thionation, 909 3-(Thiazol-4-yl)-4-hydroxycoumarins, synthesis of, 319 Total p-electron energy, non-bonding molecular orbitals, 777 Transition and heavy metal ions, influence on ATP-ases activity, 541 Tungsten, rhenium, separation factor, 683 Urethane acrylates, 441 Vertical argon stabilized DC arc plasma, 377 Volumetric properties of ethanol, water and 1-pentanol, 1073 Zenkevich and Wiener indices of alkanes, relation, 265 Zn(II), Cd(II), Pt(II) and Pd(II) complexes with potassium 3-dithiocarboxy-3-aza-5-aminopentanoate, 137 Zn–Fe alloys, electrochemical deposition and characterization of , 807 Zn(II), Pd(II) and Pt(II) complex with 2’-[1-(2-pyridinyl)ethylidene]oxamohydrazid, 651. J.Serb.Chem.Soc. 69 (12)1169–1173 (2004) Author index Abd El Haleem S., 255 Abd El Wahed M. G., 255 Abd El Wanees S., 255 Agrawal M., 661 Akcay M., 123 Altunata T., 123 Alves Jr S., 387 Alyonkina T. V., 421 Amblès A., 923 Andjeli} T., 1153 An|elkovi} K., 651 Antonovi} D. G., 759 Antov M. G., 299 Anuse M. A., 283 Arsenijevi} @. Lj., 1129 Arsi} B., 265 Assaleh F.H., 949 Babi} D., 441 Bajat J. B., 807 Bajc S., 923 Bajduk D., 877 Baluja S., 991 Barabanova A.V., 421 Baranac M., 239, 909 Baras J., 625 Barkauskas J., 363 Basavaiah K., 403 Belian M. F., 387 Berkem M. L., 689 Bhise S., 527 Bicer N., 123 Bilgin M., 669 Bjelakovi} M.S., 413 Bocian B., 195 Bosevska V., 145 Bo{kovi} S., 59, 705 Bo{kovi} @., 265 Bo`i} B., 441 Bo`i} N., 901 Bo`i} T., 901 Brankov V., 549 Brezovska S., 145 Budinski-Simendi} J., 167 Burazer L., 533 Burevski D., 145 Burudkar S., 527 Chen S., 791 Chen Sh., 33 Cmiljanovi} N., 777 Craus M.-L. , 53 Crnomarkovi} M., 827 Cui H., 33 Cui Y., 675 Cvetkovi} O., 611 ^akar M., 225 ^ekovi} Z., 737 Çelik H., 1 ]irin-Novta V., 117, 349 ]irkovi} Veli~kovi} T.D., 533 Dabovi} M. M., 413, 861 Dakovi} A., 273 De Farias R. F., 387 Dervinyte M., 363 De Souza J. M. , 387 De Sã G. F. , 387 Djergovi}-Petrovi} D., 533 Djoki} S.S., 411 Djonlagi} J., 1013 Djordjevi} B., 827 Djordjevi} J.B., 511, 955 Djurdjevi} M., 1111 Djuri} S., 1121 Dondur V., 273 Do{en-Mi}ovi} Lj., 511, 737, 843, 955 Dra`i} D. M., 807, 1099 Drevko B.I., 431 Dudukovi} A. P., 77 Dunji} B., 441 D`ambaski Z., 239 D`unovi} E., 441 El Gamel M., 255 Eliseev Yu.Yu., 421 Fagadar-Cosma E., 1043 Fedotova O.V., 421 Ferenc W., 195 Filipovi} I., 611 Furtula B., 265 Gaji} R., 493 Ga{i} M. J., 901 Gavrovi}-Jankulovi} M. Dj., 533 Gevrenova R., 571 Gligi} Lj., 9 Go|evac D., 883 Goenaga J. M., 1073 Golubovi} A., 493, 1121 Gonzáles C., 1073 Gooding J. J., 93 Grbav~i} @. B., 1129 Grbi} B. V., 1129 Grgur B.N., 411 Grozdani} D. K., 233 Gruji} S. A., 137 Gürkan R., 123 Gutman I., 265, 503, 549, 777, 877 Han`el D., 179 Havaldar F.H., 527 Hervello M., 461 Hini} I., 493 Holclajtner-Antunovi} I., 377 Howing J., 651 Huang X., 175 Husárek J., 1055 Iglesias M., 461, 1075 Ilia G., 1045 Iliesku S., 1045 Ivancheva S., 571 Ivanovi} E. R., 43, 955 Ivanovi} M.D., 511, 955 Jakovljevi} D., 455 Jakovljevi} G., 651 Jana}kovi} P., 883, 969 Jankov R. M., 9, 533 Jankovi} V. D., 85 Jegdi} B., 1099 Jiang R.-T., 675 Jiao Y., 791 Johnson T. W., 887 Jokanovi} M., 69 Jovan~i}evi} B., 611 Jovanovi} B. @., 949 Jovanovi} D., 1013 Jovanovi} J., 749 Jovanovi} J. D., 233 Jovanovi} S., 455 Jovanovi} T., 485 Jovanovi} T. B., 1005 Jovani} P., 239 Joveti} S., 909 Jovi} B. M., 153 Jovi} V., 411 Jovi} V. D., 153 Ka~arevi}-Popovi} Z., 1029 Kali~anin B.M., 575 Kalvoda J., 861 Kandra~ J., 349 Karanovi} Lj., 353 Kau~i} V., 179 Kazlauskas R., 393 Kevre{an S., 349 Ki}evi} D., 239 Kidwai M., 247 Kijev~anin M., 827 Kiliç H., 689 Kirbaçlar F. G., 1 Kiricojevi} V.D., 511, 955 Klich M., 855 Kop T., 769 Kori}anac Z., 485 Kosti} D.A., 477 Kosti} N., 887 Kostoski D., 1031 Kova~evi} M., 1153 Krinulovi} K., 541 Krsti} D., 541 Krsti} Lj., 319 Krsti} N., 413 Krsti} S. B., 43, 817 Krstic V.V., 601 Kuhajda K., 349 Kumar R., 635 Lazi} M.L., 581 Lazi} M. S., 239 Leka Z., 137 Lemi} J., 273 Li G., 791 Li L., 33 Lorenc Lj. B., 413, 861 Lo{i} D., 93 Luki} D. M., 683 Luki} S., 137 Luo L., 783 Lu P., 335 Ma H., 791 MaloÁ M., 1055 Maksimovi} M., 625 Maksimovi} M. D., 807 Maksimovi} V. M., 817 Malhotra S., 661 Manojlovi} N., 319 Marcu I.-C., 563 Mari} M., 827 Marina B., 145 Marinkovi} A. D., 949 Marino G., 461 Marinovi}-Cincovi} M., 167 Markovi} D., 1145 Markovi} D. Z., 107 Markovi} G., 167 Markovi} R., 239, 909 Markovi} Z., 877 Martinovi} S., 861 Matovi} B., 705 Matovi} R., 981 Matovi} V., 69 Menkovi} N., 883 Mi}ovi} I.V., 511, 955 Mijin D. @., 85, 711, 759 Mileti} G.@., 477 Mileti} S., 973 Milhous W. K., 919 Mili} D., 901 Milisavljevi} S., 941 Milonji} S. K., 1063 Milosavljevi} B. H., 999 Milosavljevi} S., 777, 883, 969 Milovanovi} S. R., 973 Miljevi} N., 1031 Minic D., 485 Miodragovi} Z. M., 17 Mishra A. D., 247 Mi{i}-Vukovi} M. M., 711 Mi{kovi}-Stankovi} V. B., 239, 807 Miti} S.S., 477 Moreno V., 461 Mu{icki B., 855 Nair R., 991 Nastasovic A., 455 Ni}iforovi} A., 999 Nika~evi} N. M., 77 Niketi} V., 343 Nikoli} G.M., 575 Nikoli} J.B., 601 Nikoli} Lj. B., 581 Nikoli} M., 343 Nikoli} M. S., 1013 Nikoli} N. D., 205 Nikoli} R.S., 575 Nikoli} S., 1119 Nikoli} V.D., 581 Nikolova M., 571 Novakovi} I., 901 Novakovi} Lj., 1029 Obradovi} M. ^., 43 Oci} O., 827 Odanovi} Z., 1111 Onjia A., 455 Opsenica D., 919 Opsenica I., 919 Ore{~anin Z., 973 Pankratov A.N., 421, 431 Panova B., 145 Panov K. I., 205 Patel D., 635 Patel M. P., 327 Patel R. G., 327 Patel R. G., 327 Pavlí~ek M., 1053 Pavlovi} Lj. J., 43, 817 Pavlovi} M. G., 43, 817 Pavlovi} M. S., 205 Pavlovic V.D., 413, 861 Pedrosa G. G., 387 Pejin S. N., 299 Peri~in D. M., 299 Periers A. M., 855 Petkovi} J., 485 Petrovi} G., 737 Petrovi} Lj., 69 Petrovi} S. D., 85, 711 Piperski V., 69 Pocsfalvi G., 769 Poleti D., 353 Polovi} N.Dj., 533 Popa A., 1045 Popi} J. P., 1099 Popovi} G., 225 Popov K. I., 43, 411, 817 Popsavin V., 117 Popsavin M., 117 Prameela H. C., 403 Prasad R.N., 661 Prasad S., 635 Predojevi} Z. J., 77 Premovi} P. I., 205, 555 Prostran M., 511, 955, 973 Pstorek R., 1053 Radenkovi} M., 1153 Radenkovi} S., 777 Radi} Lj., 117 Radoj~i} M. B., 999 Radoji~i} R. M., 1005 Radosavljevi}-Mihajlovi} A., 273 Radovanovi} B., 167 Radulovi} @., 9 Rafat F., 641 Raji} N., 179 Rajmane M. M., 283 Rakin M., 625 Ra{ovi} A., 909 Ra`i} S., 377 Resa J. M., 1073 Risti} S., 69 Rogan J., 353 Rom~evi} N., 1121 Rusu A., 53 Rusu I., 53 Sai~i} R. N., 737, 981 Sai~i} Z. S., 1005 Sargar B. M., 283 Savi} J., 309 Sãndulescu I., 563 Savin A., 1145 Shanda S., 991 Shapter J. G-, 93 Short K., 93 Siddiqi K.S., 641 Siddiqi M.Y., 641 Simi}-Krsti} J. B., 1005 Simovi} K., 239 Sinadinovi}-Fi{er S., 749 Skala D.U., 581 Skuban S., 137 Sladi} D., 651, 901 Sokovi} M., 969 Soluji} S., 319 Soni M., 991 Spasi} M. B., 973 Spasi} S., 973 Spasi} S. D., 1005 Stani} D., 343 Stankovi} S., 455 Steel P., 909 Steponeniene L., 393 Stevanovi} D., 549, 777 Stojakovi} Dj., 179 Stojanovi} K., 611 Stojanovi} M., 871, 909 Stojanovska L., 145 Stoiljkovi} M. M., 683 Sukdolak S., 319 Sun G.-X., 675 Sun S.-X., 675 Sutiman D., 53 [ainovi} A., 611 [eatovi} S., 9 [e}erov B., 1029 [erbanovi} S., 827 [indaláÍ Z., 1053 [olaja B., 769, 901, 919 Tanaskovi} S., 17 Tanaskovi} S. B., 187 Tasi} G., 981 Tasi} J., 69 Tasi} S., 441 Tautkus S., 393 Tellgren R., 651 Terzi} N., 919 Tessot N., 855 Te{evi} V., 883, 969 Te{i} @., 137, 651 Todorovi} M., 377 Todorovi} Z., 511, 955 Todorovi} @. N., 1065 Toma{evi}-^anovi} M., 273 Touriño A., 461 Trifunovic S., 137, 969 U{}umli} G,S., 601 Vaghasiya Y., 991 Vajs V., 883, 969 Val~i} A., 493 Vasi} V., 309, 541 Vasiljevi}-Radovi} D., 1099 Veljkovi} V.B., 581 Veselinovi} D., 1145 Vieira M. R. S., 387 Vitorovi} D., 611, 839, 923 Vu~ina J.L., 683 Vu~kovi} A., 59 Vu~kovi} O., 533 Vu~kovi} S., 511, 955 Vu~kovi} G., 17, 187 Vuj~i} Z., 901 Vujisi} Lj., 541 Vuka{inovi} M., 625 Vukeli} N., 309 Vuki}evi} R. D., 941 Vukoti} P., 1153 Vukovi} N., 319 Walkow-Dziewulska A., 195 Wu H., 33 Xia G. M., 335 Xu G. B., 335 Xu R.-Q., 675 Yang X., 783 Yusufo™lu A., 1 Zec S., 807 Zhang Zh.-W., 675 Zhong H., 783 Zhong P., 175 Zlatovi} M., 651 Zor, S. 25 @ivkovi} Lj., 59