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A New Synthesis of Bromobenzotropones: Oxidation of 8-Bromo-5 H -Benzo[a]cycloheptene
ARİF DAŞTAN, Y. KEMAL YILDIZ, CAVİT KAZAZ, and METİN BALCI
Pages 143-152

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An Investigation of the Interaction of 4-Membered Rings with Adjacent Carbanion Centers
ÖZDEN ÖZEL GÜVEN and N. BEKİR PEYNİRCİOĞLU
Pages 153-158

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Synthesis and Electronic Structure of New Aryl- and Alkyl-Substituted 1,3,4-Oxadiazole-2-thione Derivatives
FERAY AYDOĞAN, ZUHAL TURGUT, NÜKET ÖCAL, and SAFİYE SAĞ ERDEM
Pages 159-170

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Iridoid and Phenylpropanoid Glycosides from Phlomis grandiflora var. fimbrilligera and Phlomis fruticosa
TAYFUN ERSÖZ, İCLAL SARACOĞLU, Ü. ŞEBNEM HARPUT, İHSAN ÇALIŞ, and ALİ ARSLAN DÖNMEZ
Pages 171-177

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Iridoid and Phenylethanoid Glycosides from Euphrasia pectinata
TAYFUN ERSÖZ, M. ZİVER BERKMAN, DENİZ TAŞDEMİR, İHSAN ÇALIŞ, and CHRIS M. IRELAND
Pages 178-188

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Diterpenes from Sideritis sipylea and S. dichotoma
GÜLAÇTI TOPÇU, AHMET C. GÖREN, TURGUT KILIÇ, Y. KEMAL YILDIZ, and GÜLENDAM TÜMEN
Pages 189-194

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Pyrrolizidine Alkaloids from Symphytum sylvaticum Boiss. subsp. sepulcrale. (Boiss.& Bal.) Greuter & Burdetvar. sepulcrale and Symphytum aintabicum Hub.- Mor. & Wickens
SEMRA KURUCU, MURAT KARTAL, MUHAMMAD IQBAL CHOUDHARY, and GÜLAÇTI TOPÇU
Pages 195-200

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Thermodynamic and Kinetic Parameters Concerning Complex Formation between 3-Hydroxy- and 1-Aminopyrene and Pyridine
NURSEL ACAR and ÖZGÜL KOÇAK
Pages 201-211

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Glycine Transport through a Charged Polysulfone Cation Exchange Membrane
NURİ ÜNLÜ, HÜSEYİN KARA, and MUSTAFA ERSÖZ
Pages 211-220

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Solvent, Temperature and Concentration Effects on the Adsorption of Poly(n-Butyl Methacrylate) on Alumina from Solutions
NURSEL PEKEL and OLGUN GÜVEN
Pages 221-228

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The Kinetics and Mechanism of Oxidation of Vanillin by Diperiodatonickelate(IV) in Aqueous Alkaline Medium
CHANDRASHEKHAR KATHARI, PANDURANG POL, and SHARANAPPA NANDIBEWOOR
Pages 229-236

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Synthesis, Spectral and Fungicidal Studies on Dioxobridged Binuclear Niobium(V) and Tantalum(V) Complexes of N-Alkylphenothiazines
BOREGOWDA KESHAVAN and HUNASEGALA KEMPE GOWDA
Pages 237-244

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Aspertins A-D: Further Piperidine Alkaloids from Andrachne aspera} (Euphorbiaceae)
VIQAR UDDIN AHMAD, ARSHAD KAMAL, and MUHAMMAD SHAIQ ALI
Pages 245-250

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Diels-Alder Reactions Using 5 M LiClO_{4} -Diethyl Ether Catalyst
MESUT KACAN and H. R. FERHAT KARABULUT
Pages 251-254

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Synthesis of 2'-Deoxy-2'-fluoro-L-arabinofuranosyl Imidazole Derivatives
SÜREYYA ÖLGEN
Pages 255-262

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Determination of Zinc in Aerosol Samples by Discrete Nebulization Flame Atomic Absorption Spectrometry
DENİZ YURTSEVER SARICA, DİLEK AKIM, and TUNCEL ÖZDEN
Pages 263-270

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Determination of Trace Elements in Iron Minerals by Atomic Absorption Spectrometry
TRAJCE STAFILOV and DRAGICA ZENDELOVSKA
Pages 271-280

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A comparative Study for basic Characterization of three Clinoptilolite Specimens
EVA CHMIELEWSKA, EVA SAMAJOVA, and JAN KOZAC
Pages 281-286

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Effects of Ozonation on Characteristics of Aquatic Fulvic Acid
ŞERMİN GÜL
Pages 287-294

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Derivative Spectrophotometric Determination of Caffeine in Some Beverages
GÜZİN ALPDOĞAN, KADİR KARABİNA, and SIDIKA SUNGUR
Pages 295-302