FULL PAPERS

Analytical Chemistry

Comparison of some preconcentration methods for certain metal ions in

human milk and yogurts

F.O. Nwosu, F.A. Adekola and E. Ibitoye                                                                  

1

Abstract

Environmental Chemistry

Study of atmospheric pollution levels by trace elements analysis of tree bark and leaves

A.A. Olajire and E.T. Ayodele                                                                                  

11

Abstract

Biodiesel fuels from palm oil, palm oil methylester and ester-diesel blends

V.I.E. Ajiwe, V.O. Ajibola and C.M.A.O. Martins                                                   

19

Abstract

Inorganic Chemistry

Spectroscopic studies of some lanthanide(III) nitrate complexes synthesized from a new ligand 2,6-bis-(salicylaldehyde hydrazone)-4-chlorophenol

M. Gaye, F.B. Tamboura, A.S. Sall                                                                           

27

Abstract

Studies on transition metal complexes of herbicidal compounds. II: Transition metal complexes of derivatized 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (atrazine)

Worku Dinku, Negussie Megersa, V.J.T. Raju, Theodros Solomon, Jan Åke Jönsson and Negussie Retta                                                                                                                                   

35

Abstract

Potentiometric study of complexes formed between (s)-α-amino-3-hydroxy-5-methyl-4-isoxazolepropanoic acid and some transition metal ions

Onindo Charles Otieno                                                                                             

45

Abstract

Organic Chemistry

Synthesis and fungicidal activity of acetyl substituted benzyl disulfides

E.T. Ayodele, A.A. Olajire, O.S. Amuda and S.O. Oladoye                                     

53

Abstract

A novel glycosidic steroidal alkaloid from Solanum aculeastrum

Alphonse W. Wanyonyi, Paul K. Tarus, Sumesh C. Chhabra                                   

61

Abstract

Intra-species variation of the properties of gum exudates from Acacia senegal var. senegal and Acacia seyal var. fistula from Tanzania

Gaspar S. Mhinzi                                                                                                       

67

Abstract

Physical Chemistry

Theoretical study of the catalytic desulfurization mechanism of thiiren and its methyl derivative

J.B. Mensah, Y.G. S. Atohoun, L.O. Olatunji                                                          

75

Abstract

Speciation of cadmium mixed ligand complexes in salt water lakes

John L. Kituyi, Henry M. Thairu, Justin Irina and Knut H. Schroder                    

85

Abstract

Electrochemical oxidation of niclosamide at a glassy carbon electrode and its determination by voltammetry

Hailemichael Alemu, Ntai M. Khoabane and Potlaki F. Tseki                                

95

Abstract

SHORT COMMUNICATIONS

Comparative study of trace element levels in some local vegetable varieties and irrigation waters from different locations in Ilorin, Nigeria

O.O. Dosumu, N. Salami and F.A. Adekola                                                            

107

Abstract

A new isoflavone from stem bark of Millettia dura

Solomon Derese, Abiy Yenesew, Jacob O. Midiwo, Matthias Heydenreich and Martin G. Peter  

113

Abstract