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Updated: Jan 30, 2026

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
Published on: November 16, 2018
Effect of exposure to light emitted diode (LED) lights on essential oil composition of sweet mint plants
Thao L Nguyen1, Mahmoud A Saleh1
1a Department of Chemistry , Texas Southern University , Houston , TX , USA.
Abstract:
Sweet mint plants (Mentha spicata) were separately exposed to blue, red and green light emitted diodes (LED) lights and natural sunlight as a control. Leaves were analyzed periodically for their essential oil composition using head space GCMS analysis. Control experiments showed that the main essential oil components were carvone (80%), limonene (17%) and other minor terpenes (3%). Exposed plants to green and red lights showed that their headspace essential oils were similar to that of the control plants. However, blue LED lights caused complete disappearance of carvone and limonene, which were never recovered. Disappearance of carvone and limonene were associated with the appearance of new chemicals at concentrations of 65 and 21% that were identified as carvone oxide and eucalyptol, respectively.
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