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Yazar "Aghatabay, Naz Mohammed" seçeneğine göre listele

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    Synthesis, structural aspects, antimicrobial activity and ion transport investigation of five new [1+1] condensed cycloheterophane peptides
    (Springer, 2014) Zaim, Ömer; Aghatabay, Naz Mohammed; Gürbüz, Mustafa Ulvi; Baydar, Çağlar; Dülger, Başaran
    Five novel [1+1] condensed cycloheterophane peptides were synthesized via reaction of pyridine-2,6-bis(2-aminothiophenoxymethyl) with several diacid chlorides: glutaryl dichloride, adipoyl dichloride, 2,2'-thiodiacetyl chloride, dithiodiglycoloyl chloride and 3,3'-thiodipropionoyl chloride combinations (L-1-L-5). The compounds were characterized by elemental analyses, mass, FT-IR, H-1, and C-13 NMR spectral data. The antimicrobial activities of the compounds were evaluated using the disk diffusion method in dimethyl sulfoxide as well as the minimal inhibitory concentration dilution method, against several bacteria and yeast cultures. The results were compared with those of commercial antibiotic and antifungal agents. Structure activity relationships were also discussed. Permeability of compound L-5 against Na+ and K+ were also investigated.
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    Synthesis, structural aspects, antimicrobial activity and ion transportation investigation of four new [2+2] condensed 24-membered cycloheterphane peptides
    (Springer, 2014) Aghatabay, Naz Mohammed; Paralı, Özge; Zaim, Ömer; Baydar, Çağlar; Dülger, Başaran
    Four novel [2 + 2] condensed tetramide-tetrathioether cycloheterophane (L (1) -L (4) ), possessing thioether as ligating units have been prepared. The compounds were characterized by elemental analyses, mass, FT-IR, H-1, and C-13 NMR spectral data. The 24-membered macrocycles have well organized symmetrical structures lacking any configurational isomerism. Ion transportation was carried out with macrocycle L (1) and L (4) against Na+, K+ and Ag+ cations. It showed a high propensity of binding with soft Ag+ cation that it undergoes configurational change during complexation. This phenomenon is not observed with hard cations, but K+ ion passes through the cavity while Na+ ions are retained. The antimicrobial activities of the compounds were evaluated using the disk diffusion method in dimethyl sulfoxide as well as the minimal inhibitory concentration dilution method, against several bacteria and yeast cultures. The results were compared with those of commercial antibiotic and antifungal agents. Structure activity relationships were also discussed.

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