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Volumn 19, Issue 5, 2009, Pages 1314-1317

Antioxidant and antiradical activities of resorcinarene tetranitroxides

Author keywords

Antioxidants; Free radicals; Inhibition; Nitroxide; Resorcinarene

Indexed keywords

ANTIOXIDANT; LINOLEIC ACID; MACROCYCLIC COMPOUND; RESORCINARENE TETRANITROXIDE; SCAVENGER; SUPEROXIDE DISMUTASE; UNCLASSIFIED DRUG;

EID: 60449110731     PISSN: 0960894X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.bmcl.2009.01.070     Document Type: Article
Times cited : (26)

References (49)
  • 12
    • 0003277099 scopus 로고    scopus 로고
    • Calixarenes revisited
    • Stoddart J.F. (Ed), Royal Society of Chemistry, Cambridge
    • Gutsche C.D. Calixarenes revisited. In: Stoddart J.F. (Ed). Monographs in Supramolecular Chemistry (1998), Royal Society of Chemistry, Cambridge
    • (1998) Monographs in Supramolecular Chemistry
    • Gutsche, C.D.1
  • 13
    • 0004287470 scopus 로고    scopus 로고
    • Asfari Z., Böhmer V., Harrowfield J., and Vicens J. (Eds), Kluwer Academic Publishers, Dordrecht
    • In: Asfari Z., Böhmer V., Harrowfield J., and Vicens J. (Eds). Calixarenes 2001 (2001), Kluwer Academic Publishers, Dordrecht
    • (2001) Calixarenes 2001
  • 31
    • 60449100148 scopus 로고    scopus 로고
    • note
    • The detailed synthesis procedure and analytical data for compounds 2a and 2b are given in Supplementary data.
  • 32
    • 60449111938 scopus 로고    scopus 로고
    • note
    • 50 were calculate from the plots of the percentage DPPH transformation after 5 min of reaction against the ratio [Scavenger]/[DPPH]. Values obtained are the average of 3-5 experiments.
  • 37
    • 60449108488 scopus 로고    scopus 로고
    • note
    • The reaction mixture (50 mM{cyrillic} phosphate buffer, r{cyrillic}N{cyrillic} 7.4) contained 50 μM{cyrillic} xanthine, 75 μM{cyrillic} nitroblue tetrazolium, EDTA (0.1 mM{cyrillic}) and 0.5-2 μM{cyrillic} resorcinarenes 2a,b or 4-hydroxy-TEMPO. Stock solution of compounds 2a,b were prepared in methanol. The volume concentration of the organic solvent in reaction mixture (2 mL) was 2%. The reaction was started by adding 0.008 U of xanthine oxidase to the mixture incubated at 25 °S{cyrillic}.
  • 41
    • 60449112170 scopus 로고    scopus 로고
    • note
    • 2+/MgO as an internal standard. Samples were accommodated in 0.8 mm diameter glass capillaries which were placed in a standard EPR tube.
  • 46
    • 60449093712 scopus 로고    scopus 로고
    • note
    • Kinetic measurements were performed as reported in Ref. 24. In our experiments, reaction mixture contained 0.05 M phosphate buffer (r{cyrillic}N{cyrillic} 7.4), 0.02% Lubrol, 0.63 mM linoleic acid and 1 mM ABAP. The sample was incubated under air atmosphere at 37 °C and the change in absorbance was monitored over time at 234 nm. Inhibition was started by adding of 5 μL of inhibitor solution to the reaction mixture with the constant rate of autooxidation. The results are expressed in terms of relative antioxidant efficiency defined as the ratio of the antioxidant efficiency of the inhibitor to that of Trolox C. The stoichiometric factors n were determined from the ratio of the lag times for the various concentrations of test antioxidant and Trolox C, the stoichiometric factor of which was taken to be 2. The values of RAE represent mean of three separate determinations and stoichiometric factors n are the average of 3-7 experiments.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.