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How Does Radiation Affect Curcumin Raw Material?
Natalia Rosiak1, Ewa Garbiec1, Waldemar Bednarski2
1Department of Pharmacognosy and Biomaterials, Poznan University of Medical Sciences, Rokietnicka 3, 60-806 Poznan, Poland.
International Journal of Molecular Sciences
|March 13, 2024
Summary
Electron beam radiation of turmeric
Area of Science:
- Food Science and Technology
- Natural Product Chemistry
- Radiation Chemistry
Background:
- Turmeric, rich in curcumin, possesses antioxidant and antiviral properties.
- Microbial contamination is a concern for raw turmeric, necessitating sterilization methods.
- Electron beam (e-beam) irradiation is a potential method for sterilizing plant-based materials.
Purpose of the Study:
- To investigate the effects of e-beam radiation on curcumin from turmeric.
- To assess the impact of radiation on curcumin's chemical structure and antioxidant activity.
- To determine if e-beam irradiation is a viable method for sterilizing curcumin.
Main Methods:
- Curcumin samples were exposed to e-beam radiation.
- High-Performance Liquid Chromatography with Diode-Array Detection and Mass Spectrometry (HPLC-DAD/MS) confirmed curcumin integrity.
- Electron Paramagnetic Resonance (EPR) spectroscopy identified radiation-induced free radicals.
- Free radical scavenging assays (DPPH, ABTS, CUPRAC, FRAP) evaluated antioxidant activity.
- Fourier-Transform Infrared (FT-IR) spectroscopy analyzed changes in phenolic hydroxyl groups.
Main Results:
- HPLC-DAD/MS confirmed no significant decomposition of curcumin post-irradiation.
- EPR spectroscopy detected radiation-generated free radicals.
- A slight decrease in the free radical scavenging activity of irradiated curcumin was observed.
- FT-IR analysis indicated changes in phenolic OH groups, correlating with radical formation.
Conclusions:
- E-beam irradiation of turmeric-derived curcumin does not cause significant decomposition.
- Radiation induces free radicals and slightly reduces antioxidant capacity.
- E-beam irradiation is a promising technique for microbial decontamination of curcumin while preserving its core structure.
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