ISSN 0352-5139 J.Serb.Chem.Soc. Vol. 71, No. 6 (2006) CONTENTS Organic Chemistry R. Singh and Geetanjali: Synthesis of selected novel 7-methoxycarbonyl-10-substituted isoalloxazines 000 S. Sukdolak, N. Vukovic, S. Solujic, M. Milosev, N. Manojlovic and Lj. Krstic: Synthesis of new 3-(2-aminothiazol-4-yl)-4-hydroxy-chromen-2-one derivatives (Note) 000 H. G. Sangani, K. B. Bhimani, R. C. Khunt and A. R. Parikh: Synthesis and characterization of barbitones as antimicrobial agents 000 Inorganic Chemistry V. M. Leovac, V. Divjakovic, V. I. Cesljevic and M. Rakocevic: Transition metal complexes with thiosemicarbazide-based ligands. Part 51. Square-planar nickel(II) complex with acetylacetone bis(S-n-propylisothiosemicarbazone) (L). Crystal and molecular structure of [Ni(L-H)]NCS and two isomorphic complexes [Ni(LH)]I·EtOH and [Ni(L-H)]I·iPrOH 000 Physical Chemistry Lj. Kolar-Anic, S. Blagojevic, N. Pejic, N. Begovic, S. Blagojevic and S. Anic: New evidence of transient complex oscillations in a closed, well-stirred BelousovZhabotinsky system 000 J. P. Markovic and S. K. Milonjic: Synthesis of zirconia colloidal dispersions by forced hydrolysis 000 J. Odovic, B. Stojimirovic, M. Aleksic, D. Milojkovic-Opsenica and Z. Tesic: Reversed-phase thin-layer chromatrography of some angiotensin converting enzyme (ACE) inhibitors and their active metabolites 000 D. Z. Mijin and D. G. Antonovic: The temperature dependence of the retention index for n-alkyl esters of acetic, propionic, cyclohexanoic, benzoic and phenylacetic acid on DB-1 and DB-5 capillary columns 000 P. I. Premovic, B. Z. Todorovic, N. D. Nikolic, M. S. Pavlovic, D. M. Djordjevic and D. T. Dulanovic: Geochemistry of Ni in the Cretaceous-Tertiary succession Fiskeler (Fish Clay) at Stevns Klint (Denmark): cheto-smectite of the black marl 000 Electrochemistry M. Charrouf, S. Bakkali, M. Cherkaoui and M. El Amrani: Influence of decyl glucoside on the electrodeposition of tin 000 Analytical Chemistry M. Cakar and G. Popovic: Determination of saccharin in pharmaceuticals by high performance thin layer chromatography 000 Materials B. Matovic, A. Saponjic and S. Boskovic: Carbonitriding reactions of diatomaceous earth: phase evolution and reaction mechanisms 000 H. Zhong and X. R. Zeng: Influence of the preparation conditions on the synthesis, structure and thermal properties of LaSrCo1-xMnxO4 000 Z. Jaksic, D. Vasiljevic-Radovic, M. Maksimovic, M. Sarajlic and Z. Djuric: Nanofabrication of planar split ring resonators for negative refractive index metamaterials in the infrared range 000 Published by the Serbian Chemical Society Karnegijeva 4/III, P.O.Box 35-08, 11120 Belgrade, Serbia and Montenegro Printed by the Faculty of Technology and Metallurgy Karnegijeva 4, P.O.Box 35-03, 11120 Belgrade, Serbia and Montenegro