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Free solution capillary electrophoresis (FSCE) has been used to separate two non-self-complementary 12mer oligonucleotide duplexes: d(AAATTATATTAT).d(ATAA-TATAATTT) and d(GGGCCGCGCCGC).d(GCGGCGCGGCCC). Titration of mixtures of the two oligonucleotides with model intercalators (ethidium bromide andactinomycin D) and minor groove binders (netropsin, Hoechst 33258 and distamycin) has shown the suitability of FSCE as a method to study the sequence selectivity of DNA binding agents. Binding data have shown cooperativity of binding for netropsin and Hoechst 33258 and have provided ligand:DNA binding ratios for all five compounds. Cooperativity of netropsin binding to a 12mer with two potential sites has been demonstrated for the first time. Ligands binding in the minor groove caused changes in migration time and peak shape which were significantly different from those caused by intercalators.

Our study on a group of Jordanians confirmed the well-established observation that broccoli induces CYP1A2 activity. This study also demonstrates the effect of gender and broccoli consumption on CYP2A6 activity in Jordanians.

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Sodium salt formation of mefenamic acid (MA) was studied as a way to solve the formulation and dissolution problems of MA. For this purpose, sodium salt of mefenamic acid (Na-MA) was prepared by reacting MA powder with equimolar sodium hydroxide in an aqueous phase, and consequently, Na-MA solution was obtained. The resultant solution was lyophilized and Na-MA powder was collected. The salt formation was confirmed by the results of fourier transformation-infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC) studies on Na-MA powder in comparison to MA powder. Na-MA powder was assessed for direct compressibility, in comparison to MA powder, when formulated as a mixture with minimum amount of Avicel((R)) pH 101 and then compressed into tablets using a hydraulic tablet press. Na-MA tablets exhibited satisfactory hardness and friability, and did not show capping or lamination. On the other hand, some MA tablets showed capping or lamination upon compression and all the tested MA tablets for friability capped. Na-MA tablets were also studied for drug dissolution, in comparison to MA tablets, in water, a pH 7.4 phosphate buffer, and a pH 7.4 phosphate buffer after soaking in 0.1 m HCl. Under these different dissolution conditions, Na-MA tablets showed much higher dissolution rate and extent than MA tablets. The results of the study suggested that Na-MA can be considered as a solution form for the formulation and dissolution problems of MA.