Eman M El-Nemma

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Cobalt(II) phthalocyanine [Co(II)Pc] is used as both an ionophore and chromogen for batch and flow injection potentiometric and spectrophotometric determination of anionic surfactants (SDS), respectively. The potentiometric technique involves preparation of a polymeric membrane sensor by dispersing [Co(II)Pc] in a plasticized PVC membrane. Under batch mode(More)
The synthesis of a series of isonicotinoylamino acids (II-XI) and some of their corresponding methyl esters (XII-XVIII), hydrazides (XXI-XXVI), dipeptide methyl esters (XXVII-XLII), the di- and tri-glycine peptides (XIX-XX) is described. Sixteen of various isonicotinoylamino acid and dipeptide derivatives were found to possess specific antimicrobial(More)
The molecular complexation reaction between iodine and the interesting mixed oxygen-nitrogen cyclic base N,N'-dibenzyl-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane (DBTODAOD) has been studied spectrophotometrically in CH2Cl2, CHCl3, and CCl4. The results of photometric titrations and elemental analysis show that the DBTODAOD base:iodine ratio is 1:4 forming(More)
The synthesis of isonicotinoylamino acids-2-sulphonylamino acids and nicotinoylamino acids-5-sulphonylamino acids (III-VII) and (XXIII-XXVII) and their corresponding methyl esters, hydrazides and some dipeptide methyl ester derivatives (VII-XXII) and (XXVIII-XXXVII) are described. Thirty two of various substituted nicotinoyl and isonicotinoyl sulphonylamino(More)
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