Effect of the steric structure of molecules on complex formation in the free radical -2,6-dialkylphenol system

1976 ◽  
Vol 12 (6) ◽  
pp. 614-619
Author(s):  
V. S. Kuts ◽  
T. S. Slipenyuk ◽  
V. D. Pokhodenko
Keyword(s):  
Free Radical ◽  
Complex Formation ◽  
Steric Structure ◽  
Structure Of Molecules

The chemistry of pyrrolic compounds. III. The free radical nature of the oxyporphyrins

1966 ◽  
Vol 19 (8) ◽  
pp. 1481 ◽  
Author(s):  
PS Clezy ◽  
FD Looney ◽  
AW Nichol ◽  
GA Smythe
Keyword(s):  
Free Radical ◽  
Structure Of Molecules ◽  
Radical Nature ◽  
Radical Character

The preparation of a-meso-oxy-1,2,3,4,5,8-hexamethyl-6,7-bis-(2?- ethoxycarbonylethyl)porphin (Ib), a new member of the oxyporphyrin series, is described. The structure of molecules of this type, which have now been shown to exhibit radical character, is further discussed.

Oxygen-derived free-radical and active oxygen complex formation from cobalt(II) chelates in vitro

1992 ◽  
Vol 5 (1) ◽  
pp. 109-115 ◽  
Author(s):  
Phillip M. Hanna ◽  
Maria B. Kadiiska ◽  
Ronald P. Mason
Keyword(s):  
Free Radical ◽  
Complex Formation ◽  
Active Oxygen ◽  
Oxygen Complex

Influence of the electronic structure of a free radical on complex-formation with a diamagnetic molecule

1978 ◽  
Vol 13 (3) ◽  
pp. 268-271
Author(s):  
V. S. Kuts ◽  
T. S. Slipenyuk ◽  
�. P. Platonova ◽  
V. D. Pokhodenko
Keyword(s):  
Electronic Structure ◽  
Free Radical ◽  
Complex Formation ◽  
Diamagnetic Molecule

scholarly journals Application of UV-Vis spectrophotometric and chemiluminescent methods for evaluation of the antioxidant action of curcumin

2012 ◽  
Vol 77 (8) ◽  
pp. 1063-1069 ◽  
Author(s):  
Stancho Stanchev ◽  
Ivanka Pencheva ◽  
Spiro Konstantinov ◽  
Danka Obreshkova ◽  
Vera Hadjimitova
Keyword(s):  
Coronary Heart Disease ◽  
Antioxidant Activity ◽  
Heart Disease ◽  
Free Radical ◽  
Complex Formation ◽  
Model Systems ◽  
Antioxidant Action ◽  
Dynamic Methods ◽  
Chemiluminescent Method

Curcumin (1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5- dione) is a natural biological active substance with an antioxidant activity. The ability of curcumin to inhibit the free radical mechanisms can be used in a prevention of diseases such as cancer and coronary heart disease. The UV-VIS spectrophotometric and chemiluminescent dynamic methods for determination of antioxidant activity of curcumin were developed. The spectrophotometric method includes investigation of the interaction between DNA, isolated from HL-60 cells, and curcumin. The decreasing of the absorption of curcumin in the presence of HL-60 DNA against the blank sample can be a measurement for some complex formation between curcumin and DNA. The chemiluminescent method involves three tests for detection of luminol - depending chemiluminescence on the base of model systems which generate superoxide, hydroxide and hypochlorite radicals. The strongest decay of chemilunimescence was registered at the highest concentration of curcumin (100 ?mol/L).

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