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Facile Synthesis of Some Coumarin Derivatives and Their Cytotoxicity through VEGFR2 and Topoisomerase II Inhibition.
Gomaa MS, Ali IAI, El Enany G, El Ashry ESH, El Rayes SM, Fathalla W, Ahmed AHA, Abubshait SA, Abubshait HA, Nafie MS. Gomaa MS, et al. Molecules. 2022 Nov 28;27(23):8279. doi: 10.3390/molecules27238279. Molecules. 2022. PMID: 36500372 Free PMC article.
The coumarin amino acids and dipeptides derivatives were prepared by the reaction of coumarin-3-carboxylic acid with amino acid methyl esters following the N,N-dicyclohexylcarbodiimide (DCC) method and 1-hydroxy-benzotriazole (HOBt), as coupling reagents. ...Validat …
The coumarin amino acids and dipeptides derivatives were prepared by the reaction of coumarin-3-carboxylic acid with amino acid methyl ester …
LC-MS/MS monitoring of the colorectal carcinoma cellular uptake and entrapment of sorafenib and its N-oxide active metabolite.
Elawady T, Al-Abd AM, Khedr A, El-Enany N, Belal F. Elawady T, et al. J Pharm Biomed Anal. 2022 May 10;213:114687. doi: 10.1016/j.jpba.2022.114687. Epub 2022 Feb 22. J Pharm Biomed Anal. 2022. PMID: 35240408
Studying such combination necessitates the development of a sensitive validated LC-MS/MS method for the determination of intra and extracellular concentration of SOR and its N-oxide metabolite (SNX) in colorectal cancer cells. SOR, SNX and the internal standard (diclofenac …
Studying such combination necessitates the development of a sensitive validated LC-MS/MS method for the determination of intra and extracell …
Voltammetric analysis of certain 4-quinolones in pharmaceuticals and biological fluids.
Rizk M, Belal F, Ibrahim F, Ahmed S, El-Enany NM. Rizk M, et al. J Pharm Biomed Anal. 2000 Dec 15;24(2):211-8. doi: 10.1016/s0731-7085(00)00401-5. J Pharm Biomed Anal. 2000. PMID: 11130200
The diffusion current concentration relationships were found to be rectilinear over the ranges 4 x 10(-5) x 10(-4) M, 1 x 10(-5)-2 x 10(-4) M, 1 x 10(-5)-4 x 10(-4) M using DCt mode for I, II and III, respectively and 1 x 10(-6)-4 x 10(-5) M, 1 x 10(-6 …
The diffusion current concentration relationships were found to be rectilinear over the ranges 4 x 10(-5) x 10(-4) M, 1 x 10(-5)-2 x …
Simultaneous determination of zopiclone and its degradation product and main impurity (2-amino-5-chloropyridine) by micellar liquid chromatography with time-programmed fluorescence detection: preliminary investigation for biological monitoring.
El-Shaheny RN, Alattas A, Nasr JJ, El-Enany N, Belal F. El-Shaheny RN, et al. J Chromatogr B Analyt Technol Biomed Life Sci. 2012 Oct 15;907:49-55. doi: 10.1016/j.jchromb.2012.08.034. Epub 2012 Sep 6. J Chromatogr B Analyt Technol Biomed Life Sci. 2012. PMID: 22999478
The analyses were carried out on BDS Hypersil phenyl column (4.6 mm 250 mm, 5 mum particle size) using micellar mobile phase consisting of 0.15M SDS, 10% n-propanol, 0.3% triethylamine, and 0.02 M orthophosphoric acid (pH 3.5) with timed programmable fluorescence de …
The analyses were carried out on BDS Hypersil phenyl column (4.6 mm 250 mm, 5 mum particle size) using micellar mobile phase consisting of 0 …
Differential pulse polarographic determination of ofloxacin in pharmaceuticals and biological fluids.
Rizk M, Belal F, Aly FA, El-Enany NM. Rizk M, et al. Talanta. 1998 May;46(1):83-9. doi: 10.1016/s0039-9140(97)00249-x. Talanta. 1998. PMID: 18967130
The current-concentration relationship was found to be rectilinear over the range 5x10(-5)-5x10(-4) M and 1x10(-5)-5x10(-4) M using the DC(t) and DPP modes respectively, with a minimum detectability (S/N=3) of 3x10(-7) M. ...
The current-concentration relationship was found to be rectilinear over the range 5x10(-5)-5x10(-4) M and 1x10(-5)-5x10(-4) M …
Simultaneous determination of loratadine and desloratadine in pharmaceutical preparations using liquid chromatography with a microemulsion as eluent.
El-Sherbiny DT, El-Enany N, Belal FF, Hansen SH. El-Sherbiny DT, et al. J Pharm Biomed Anal. 2007 Mar 12;43(4):1236-42. doi: 10.1016/j.jpba.2006.10.027. Epub 2006 Nov 28. J Pharm Biomed Anal. 2007. PMID: 17126519
The optimized microemulsion mobile phase consisted of 0.1M sodium dodecyl sulphate, 1% octanol, 10% n-propanol and 0.3% triethylamine in 0.02 M phosphoric acid, pH 3.0. ...
The optimized microemulsion mobile phase consisted of 0.1M sodium dodecyl sulphate, 1% octanol, 10% n-propanol and 0.3% triethylamine …
Voltammetric analysis of trazodone HCl in pharmaceuticals and biological fluids.
EL-Enany N, Belal F, Rizk M. EL-Enany N, et al. J Pharm Biomed Anal. 2002 Sep 5;30(2):219-26. doi: 10.1016/s0731-7085(02)00327-8. J Pharm Biomed Anal. 2002. PMID: 12191706
At pH 10, the diffusion current-concentration relationship was found to be rectilinear over the range 4-32 and 0.8-24 microg ml(-1) using DC(t) and DPP modes, respectively, with minimum detectability (S/N=2) of 0.104 microg ml(-1) (2.45 x 10(-6) M) and 0.314 microg …
At pH 10, the diffusion current-concentration relationship was found to be rectilinear over the range 4-32 and 0.8-24 microg ml(-1) using DC …
Simultaneous determination of floctafenine and its hydrolytic degradation product floctafenic acid using micellar liquid chromatography with applications to tablets and human plasma.
Walash MI, Belal F, El-Enany N, Eid M, El-Shaheny RN. Walash MI, et al. J AOAC Int. 2013 Nov-Dec;96(6):1315-24. doi: 10.5740/jaoacint.11-255. J AOAC Int. 2013. PMID: 24645510
The analysis was carried out on a CLC Shim-Pack octyl silane (C8) column (150 x 4.6 mm id, 5 microm particle size) using a micellar mobile phase consisting of 0.15 M sodium dodecyl sulfate, 10% n-propanol, and 0.3% triethylamine in 0.02 M orthophosphoric acid …
The analysis was carried out on a CLC Shim-Pack octyl silane (C8) column (150 x 4.6 mm id, 5 microm particle size) using a micellar mobile p …
Simultaneous determination of sulpiride and mebeverine by HPLC method using fluorescence detection: application to real human plasma.
Walash MI, Kh Sharaf El-Din MM, El-Enany NM, Eid MI, Shalan SM. Walash MI, et al. Chem Cent J. 2012 Feb 14;6:13. doi: 10.1186/1752-153X-6-13. Chem Cent J. 2012. PMID: 22333299 Free PMC article.
The separation of these compounds was achieved within 6 min on a 250 mm, 4.6 mm i.d., 5 m particle size Waters-C18 column using isocractic mobile phase containing a mixture of acetonitrile and 0.01 M dihydrogenphosphate buffer (45:55) at pH = 4.0. ...For real human …
The separation of these compounds was achieved within 6 min on a 250 mm, 4.6 mm i.d., 5 m particle size Waters-C18 column using isocr …
Spectrophotometric determination of gliclazide in pharmaceuticals and biological fluids through ternary complex formation with eosin and palladium (II).
El-Enany N. El-Enany N. Farmaco. 2004 Jan;59(1):63-9. doi: 10.1016/j.farmac.2003.08.007. Farmaco. 2004. PMID: 14751318
The solution of ternary complex obeyed Beer's law over the concentration range of 0.5-4 microg ml(-1) with minimum detectability (S/N = 2) of 0.05 microg ml(-1) (1.545 x 10(-7) M). The different experimental parameters affecting the development and stability of the …
The solution of ternary complex obeyed Beer's law over the concentration range of 0.5-4 microg ml(-1) with minimum detectability (S/N …
15 results