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| Vong, Lilita; Laes, Agathe; Blain, Stéphane. |
| A new method for the non-specific determination of iron-porphyrin-like complexes in natural waters has been developed. It is based on the chemiluminescent oxidation of the luminol in the presence of dioxygen (O-2) at pH 13. The method has been implemented in a FIA manifold that allowed the direct injection of seawater. The limit of detection is 0.11 nM of equivalent hemin (Fe-protoporphyrin IX). Fe2+, Fe3+, H2O2, siderophore (deferoxamin mesylate), humic acid and phytic acid did not interfere when the), were present at the concentrations expected in seawater. Metal free porphyrin and Mg, Cu, Co porphyrin complexes did not induce a significant chemiluminescent signal. Poisoned unfiltered samples could be stored for several weeks before analyses. The new... |
| Tipo: Text |
Palavras-chave: Chemiluminescence; Complexation; Flow injection; Seawater; Porphyrin; Iron. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3298.pdf |
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| Karimipour,Gholamreza; Kowkabi,Saeed; Naghiha,Asghar. |
| This work studied the synthesis of 5,10,15-tris(4-aminophenyl)-20-(N,N-dialkyl/diaryl-N-phenylurea) porphyrins (P1-P4 with alkyl or aryl groups of Ph, iPr, Et and Me, respectively) and also the preparation of their manganese (III) and cobalt (II) complexes (MnP and CoP). The P1-P4 ligands were characterized by different spectroscopic techniques (1H NMR, FTIR, UV-Vis) and elemental analysis, and metalated with Mn and Co acetate salts. The antibacterial and antifungal activities of these compounds in vitro were investigated by agar-disc diffusion method against Escherichia coli (-), Pseudomonas aeruginosa (-), Staphylococcus aureus(+), Bacillus subtilis (+) and Aspergillus oryzae and Candida albicans. Results showed that antibacterial and antifungal activity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Porphyrin; Aminoporphyrins; Antibacterial/Antifungal Activity; Synthesis; Carbamoyl Chloride. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000300431 |
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