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Ahmed E. Fazary Erzalina Hernowo Artik Elisa Angkawijaya Tse-Chuan Chou Chih Hung Lin Mohamed Taha Yi-Hsu Ju 《Journal of solution chemistry》2011,40(12):1965-1986
The complexation equilibria of L-norleucine and gallic acid were studied in aqueous solutions at 25.00 °C and ionic strength
0.15 mol⋅dm−3 (NaNO3), by means of potentiometry and spectrophotometry. The ferric (FeIII), chromium (CrIII), and cupric (CuII) complexing abilities of L-norleucine and gallic acid, along with their overall stability constants, were obtained with the
HYPERQUAD 2008 program from the potentiometric data. The concentration distributions of the various complex species in solution
were evaluated and discussed. UV–visible spectroscopic measurements were carried out to give qualitative information about
the composition of the complexes formed in these solutions. The cytotoxic activities of the binary and ternary metal complexes
of L-norleucine and gallic acid were tested and evaluated against HEp-2 (human laryngeal carcinoma), Daoy (human medulloblastoma),
MCF-7 (human breast adenocarcinoma), and WiDr (human colon adenocarcinoma) tumor cell lines. Also, their antioxidant activities
were examined by free radical scavenging assay. 相似文献
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Artik Elisa Angkawijaya Ahmed E. Fazary Erzalina Hernowo Suryadi Ismadji Yi-Hsu Ju 《Journal of solution chemistry》2012,41(7):1156-1164
Binary and mixed-ligand complexes of Ni2+ and Co2+ involving L-norvaline (Nva) and ferulic acid (FA) have been investigated in aqueous solutions by pH potentiometry and UV?Cvisible spectrophotometric techniques, at 298.15 K and fixed ionic strength (0.15?mol?dm?3, NaNO3). The overall stability constants of the Ni2+ and Co2+ complexes with the ligands studied were obtained by the HYPERQUAD2008 program from the pH-potentiometric data. As a result of the numerical treatment, a model composed of seven species NiNva+, NiNva2, NiNvaH?1, $\mathrm{NiNva}_{ - 2}^{ -}$ , NiFA, $\mathrm{NiFAH}_{ - 1}^{ -}$ and NiNvaFA? was obtained for the Ni2++Nva+FA system, whereas for the Co2++Nva+FA system the complexes CoNva+, CoNva2, CoNvaH?1, $\mathrm{CoNvaH}_{ - 2}^{ -}$ , CoFA, $\mathrm{CoFAH}_{ - 1}^{ -}$ , and CoNvaFA? were obtained. The complex species distributions in certain pH ranges were calculated by the HySS2009 simulation program. Spectroscopic UV?Cvisible measurements were carried out to give qualitative information about the complexes formed in these solutions. 相似文献
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