Thermal Degradation of Linalool-Chemotype Cinnamomum osmophloeum Leaf Essential Oil and Its Stabilization by Microencapsulation with β-Cyclodextrin

Abstract

The thermal degradation of linalool-chemotype Cinnamomum osmophloeum leaf essential oil and the stability effect of microencapsulation of leaf essential oil with β-cyclodextrin were studied. After thermal degradation of linalool-chemotype leaf essential oil, degraded compounds including β-myrcene, cis-ocimene and trans-ocimene, were formed through the dehydroxylation of linalool; and ene cyclization also occurs to linalool and its dehydroxylated products to form the compounds such as limonene, terpinolene and α-terpinene. The optimal microencapsulation conditions of leaf essential oil microcapsules were at a leaf essential oil to the β-cyclodextrin ratio of 15:85 and with a solvent ratio (ethanol to water) of 1:5. The maximum yield of leaf essential oil microencapsulated with β-cyclodextrin was 96.5%. According to results from the accelerated dry-heat aging test, β-cyclodextrin was fairly stable at 105 °C, and microencapsulation with β-cyclodextrin can efficiently slow down the emission of linalool-chemotype C. osmophloeum leaf essential oil.

Antifungal Sesquiterpenoids from Michelia formosana Leaf Essential Oil against Wood-Rotting Fungi

“…Fresh leaves (100 g) of M. formosana were hydrodistilled in a Clevenger-type apparatus (1 L) with 600 mL of distilled water for 8 h to obtain essential oil [ 28 , 29 , 30 , 31 ]. Yield of leaf essential oil was 0.87% ( w / w ).…”

Cytotoxicity and Apoptosis Induction of 6,7-Dehydroroyleanone from Taiwania cryptomerioides Bark Essential Oil in Hepatocellular Carcinoma Cells

“…Pharmaceutics 2022, 14, x FOR PEER REVIEW 3 of 11 carrier gas, helium, was 1 mL/min, and the split ratio was 1:10. Compound was characterized by comparing the mass spectra (m/z 50-650 amu); quantification was analyzed by integrating the peak area of the chromatogram using the flame ionization detector (FID) [24,25].…”

A Comprehensive Review on Phytochemical, Pharmacological and Future Prospective of Dietary Medicinal Plant Cinnamomum osmophloeum Kanehira

“…The C. osmophloeum ct. linalool leaf oil showed in vivo antidepressant and motor coordination activities in a rodent animal model [57]. Additionally, the thermal degradation of linalool-chemotype C. osmophloeum leaf EOs is stabilized by its microencapsulation with β-cyclodextrin [58]. On the other hand, twigs EOs and its major constituents from the twigs of C. osmophloeum showed anti-inflammatory activity through reduced nitric oxide (NO) and prostaglandin E2 (PGE2) production in activated RAW 264.7 macrophages [41].…”