Radiation Damage Centers in Cholesteryl Heptanoate

• Authors: U. Sayin , C. Can , E. Türkkan , Ö. Dereli , A. Ozmen , H. Yüksel
• Languages of publication: EN

Abstracts

EN

Cholesterol takes part significantly in many biological mechanisms and as important component for manufacture of bile acids, steroid hormones, and several fat-soluble vitamins. To determine magnetic properties of cholesteryl heptanoate (C_{34}H_{58}O_2) which is an important cholesteryl ester in human life and new technology, the single crystals of cholesteryl heptanoate were grown by slow evaporation of concentrated ethyl acetate solution and the grown single crystals were irradiated at room temperature with ^{60}Co γ ray. The radical produced by gamma irradiation has been investigated in the range of temperatures 123-330 K for different orientations of the crystal in a magnetic field by EPR. Radiation damage center was attributed to radical ĊH_α CH_{2β}. The g factor and hyperfine coupling constants have slight dependence on temperature and evident dependence on the orientation of the magnetic field. Determined g factor and hyperfine coupling constants for the radical ĊH_α CH_{2β} were found to be anisotropic with the average values g_{av}=2.0036, (a_{CH_α})_{av}=14.52 G, (a_{CH_{2β}})_{av}=25.78 G.

Keywords

EN

61.80.-x

Discipline

• 61.80.-x: Physical radiation effects, radiation damage(for photochemical reactions, see 82.50.-m; for effects of ionizing radiation on biological systems, see 87.53.-j)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 124
• Issue: 1
• Pages: 70-73

Dates

published

2013-07

received

2012-07-30

(unknown)

2013-04-06

Contributors

author

U. Sayin

• Physics Department, Selcuk University, Konya, Turkey
• Advanced Technology Research and Application Center, Selcuk University, Konya, Turkey

author

C. Can

• Physics Department, Selcuk University, Konya, Turkey

author

E. Türkkan

• Physics Education Department, Necmettin Erbakan University, Konya, Turkey

author

Ö. Dereli

• Physics Education Department, Necmettin Erbakan University, Konya, Turkey

author

A. Ozmen

• Physics Department, Selcuk University, Konya, Turkey

author

H. Yüksel

• Physics Department, Selcuk University, Konya, Turkey

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Identifiers

DOI

10.12693/APhysPolA.124.70