Analytical Chemistry

Determination of bromoxynil and ioxynil in the presence of carbamates by supported liquid membrane-liquid chromatography in river waters

Titus Motswadi Maswabi and Mathew M. Nindi                                                                    

119

Abstract

Derivative spectrophotometric determination of trace lead in alloys and biological samples after separation and preconcentration with the ion pair of 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol and ammonium tetraphenylborate on microcrystalline naphthalene or by column method

Mohammad Ali Taher                                                                                                                

129

Abstract

Geochemistry

Chemical and structural characterization of natural phosphate of Hahotoe (Togo)

Gado Tchangbeddji, Gnande Djeteli, Koffi Ani Kili, Jean Michel Savariault  and Jean Louis Lacout

139

Abstract

Ceramic properties of Pugu kaolin clays. Part I:  Porosity and modulus of rupture

Leonard D. Akwilapo and Kjell Wiik                                                                                      

147

Abstract

Inorganic Chemistry

Coordination of cassava starch to metal ions and thermolysis of resulting complexes

Wojciech Ciesielski and Piotr Tomasik                                                                                

155

Abstract

Synthesis and X-ray structure of the dysprosium(III) complex derived from the ligand 5-chloro-1,3-diformyl-2-hydroxybenzene-bis-(2-hydroxybenzoylhydrazone) [Dy₂(C₂₂H₁₆ClN₄O₅)₃](SCN)₃.(H₂O).(CH₃OH)

Mayoro Diop, Farba B. Tamboura, Mohamed Gaye, Abdou S. Sall, Aliou H. Barry and Tahar Jouini

167

Abstract

Organic Chemistry

Nauclefolinine: A new alkaloid from the roots of Nauclea latifolia

D. Ngnokam, J.F. Ayafor, J.D. Connolly and J.M. Nuzillard                                              

173

Abstract

4,5-Epoxide-1,6-dimethyl-1-vinylhexyl p-coumarate: A novel monoterpene derivative

from Cleistopholis patens

D. Ngnokam, A. Tsopmo, J.F. Ayafor, J.M. Nuzillard and O. Sterner                              

177

Abstract

Gossweilone: A new podocarpane derivative from the stem bark of Drypetes gossweileri (Euphorbiaceae)

Silvère Ngouela, Joseph Ngoupayo, Diderot T. Noungoue, Etienne Tsamo and Joseph D. Connolly   

181

Abstract

Bioactive metabolites from Trichoderma harzianum and Trichoderma longibrachiatum

P.K. Tarus, C.C. Lang’at-Thoruwa, A.W. Wanyonyi and S.C. Chhabra                          

185

Abstract

Anti-inflammatory and analgesic activities:  Chemical constituents of essential oils of Ocimum gratissimum, Eucalyptus citriodora and Cymbopogon giganteus inhibited lipoxygenase L-1 and cyclooxygenase of PGHS

G. Bedi Sahouo, Z.F. Tonzibo, B. Boti, C. Chopard, J.P. Mahy, and Yao T. N’guessan        

191

Abstract

Physical Chemistry

Hydration structure of Ti(III) and Cr(III): Monte Carlo simulation including three-body corrections

Ahmed M. Mohammed                                                                                                               

199

Abstract

Vibrational spectra of t-butyl alcohol, t-butylamine and t-butyl alcohol + tbutylamine

binary liquid mixtures

Pius K. Kipkemboi, Paul C. Kiprono and Jackson J. Sanga                                              

211

Abstract

Catalysis of the Michael reactions by N,N’-dimethylaminopropyl derivatised micelle templated silica: Effects of solvent and catalyst loading

J.E.G. Mdoe, J.H Clark and D.J. Macquarrie                                                                        

219

Abstract