Methods for Thermal Stability Enhancement of Leaf Essential Oils and Their Main Constituents from Indigenous Cinnamon (Cinnamomum osmophloeum)

Abstract

The thermal stability of leaf essential oils from various Cinnamomum osmophloeum and their constituents was investigated for the first time. The results indicated that trans-cinnamaldehyde (Cin) content in eugenol-free essential oil from C. osmophloeum was affected by high temperatures. The retention of Cin (RC) decreased to 17.4% after the essential oil was incubated for 8 h at 100 °C. In contrast, essential oils containing eugenol showed greater thermal stability. Seven kinds of antioxidants were added to Cin to improve its thermal stability. Among them, eugenol endowed Cin with the best thermal stability. We also investigated the influence of various amounts of eugenol on the thermal stability of both essential oil and Cin. Both essential oil and Cin showed excellent thermal stability when 0.62 and 2.60% (v/v) eugenol were added. In short, the thermal stability of essential oil and Cin could be effectively improved by adding appropriate amounts of eugenol.

Pharmacological properties and their medicinal uses ofCinnamomum: a review

“…Terpinenes: Borneol; camphene; camphor; limonene; linalool; myrcene; p-cymene; spathulenol; viridiflorol; b-caryophyllene; b-pinene; d-cadinene; ⍺-cadinol; ⍺pinene; ⍺-terpineol [176] [209] Kaempferol glycosides: [210] Anticancer, [130,211] antidiabetic, [212,213] antidyslipidaemic, [214] antiinflammatory, [209,215] antimicrobial [216,217] , antioxidant, [213,218] cardioprotective, [219] cytotoxicity, [220] hair growth, [221] hepatoprotective, [222] hypolipidaemic effect, [223] hypouricaemic effects, [224] immunomodulatory, [225] larvicidal, [29] pancreas-protective effect, [226] tyrosinase, [220,227] wound healing, [227] xanthine oxidase inhibitory [224] Arthritis, [228] cough and cold, [228] diabetes, [228] infection, [222] inflammation, [228] nerve pains, [228] pyrexia [228] Bark Flavonoids: (E)-Cinnamaldehyde; (Z)cinnamaldehyde. [229] Hydrocarbon: Phenol; c-muurolene [229] Flavonoids: cis-Cinnamaldehyde; transcinnamaldehyde [5,230,231] ; cinnamaldehyde. [232] Hydrocarbon: c-Cadinene; d-cadinene; ⍺-copaene [232] ; copaene.…”

“…[2] Around 250 species of this genus are identified around the world. [3,4] Different parts contain some primary constituents, that is cinnamaldehyde and trans-cinnamaldehyde (Cin), present in the essential oil of its bark contributing to the fragrance and various biological activity, [5] eugenol (leaf) inhibit several different MDR pathogenic bacteria [6,7] and camphor (root). [8] This genus contains four main economically important cinnamon species, that is Cinnamomum verum ('true cinnamon', Sri Lankan or Ceylon cinnamon), Cinnamomum cassia (Chinese cinnamon), Cinnamomum burmannii (Java or Indonesian cinnamon) and Cinnamomum loureiroi (Vietnamese or Saigon cinnamon).…”

Cinnamon: A Multifaceted Medicinal Plant

“…The most important constituents of cinnamon are cinnamaldehyde and trans -cinnamaldehyde (Cin), which are present in the essential oil, thus contributing to the fragrance and to the various biological activities observed with cinnamon [4]. A study on Cinnamomum osmophloeum ( C .…”

Ameliorative impact of cinnamon against high blood pressure; an updated review

“…They also own antioxidant activities (11). In the same way, the most important ingredients of cinnamon is trans-cinnamaldehyde or cinnamaldehyde (Figure 1), which exists in the essential oil, therefore donating to the fragrance and to the diverse biological activities perceived with cinnamon (12). Equally important, in 2008, a study by Chang et al on Cinnamomum osmophloeum demonstrated that the essential oil from cinnamon leaves includes a high level of cinnamon.…”