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

Author

Hui-Ting Chang, Chun-Ya Lin, Li-Sheng Hsu, and Shang-Tzen Chang

Subjects
Cinnamomum osmophloeum, linalool, β-cyclodextrin, microencapsulation, Organic chemistry, QD241-441
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.

Published
2021
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2. Xanthine Oxidase Inhibitory Activity and Thermostability of Cinnamaldehyde-Chemotype Leaf Oil of Cinnamomum osmophloeum Microencapsulated with β-Cyclodextrin

Author

Chi-Ya Huang, Ting-Feng Yeh, Fu-Lan Hsu, Chun-Ya Lin, Shang-Tzen Chang, and Hui-Ting Chang

Subjects
trans-cinnamaldehyde, Cinnamomum osmophloeum, β-cyclodextrin, microencapsulation, xanthine oxidase inhibitory activity, Organic chemistry, QD241-441
Abstract

The xanthine oxidase inhibitory activity and thermostability of Cinnamomum osmophloeum leaf oil microencapsulated with β-cyclodextrin were evaluated in this study. The yield of leaf oil microcapsules was 86.3% using the optimal reaction conditions at the leaf oil to β-cyclodextrin ratio of 15:85 and ethanol to water ratio ranging from 1:3 to 1:5. Based on the FTIR analysis, the characteristic absorption bands of major constituent, trans-cinnamaldehyde, were confirmed in the spectra of leaf oil microcapsules. According to the dry-heat aging test, β-cyclodextrin was thermostable under the high temperature conditions, and it was beneficial to reduce the emission of C. osmophloeum leaf oil. Leaf oil microcapsules exhibited high xanthine oxidase inhibitory activity, with an IC50 value of 83.3 µg/mL. It is concluded that the lifetime of C. osmophloeum leaf oil can be effectively improved by microencapsulation, and leaf oil microcapsules possess superior xanthine oxidase inhibitory activity.

Published
2018
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3. Thermal Degradation of Linalool-Chemotype Cinnamomum osmophloeum Leaf Essential Oil and Its Stabilization by Microencapsulation with β-Cyclodextrin

Author

Li Sheng Hsu, Chun Ya Lin, Hui-Ting Chang, and Shang-Tzen Chang

Subjects
linalool, Cinnamomum osmophloeum, Pharmaceutical Science, Beta-Cyclodextrins, 01 natural sciences, Analytical Chemistry, law.invention, lcsh:QD241-441, 03 medical and health sciences, chemistry.chemical_compound, lcsh:Organic chemistry, Linalool, law, Drug Discovery, Food science, Physical and Theoretical Chemistry, Essential oil, 030304 developmental biology, 0303 health sciences, Limonene, biology, Chemotype, 010405 organic chemistry, Chemistry, Organic Chemistry, biology.organism_classification, 0104 chemical sciences, Vegetable oil, Chemistry (miscellaneous), β-cyclodextrin, Molecular Medicine, microencapsulation, Cinnamomum
Abstract

The thermal degradation of linalool-chemotype Cinnamomum osmophloeum leaf essential oil and the stability effect of microencapsulation of leaf essential oil with &beta, cyclodextrin were studied. After thermal degradation of linalool-chemotype leaf essential oil, degraded compounds including &beta, 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 &alpha, terpinene. The optimal microencapsulation conditions of leaf essential oil microcapsules were at a leaf essential oil to the &beta, 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 &beta, cyclodextrin was 96.5%. According to results from the accelerated dry-heat aging test, &beta, cyclodextrin was fairly stable at 105 &deg, C, and microencapsulation with &beta, cyclodextrin can efficiently slow down the emission of linalool-chemotype C. osmophloeum leaf essential oil.

Published
2021
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4. Xanthine Oxidase Inhibitory Activity and Thermostability of Cinnamaldehyde-Chemotype Leaf Oil of Cinnamomum osmophloeum Microencapsulated with β-Cyclodextrin

Author

Hui-Ting Chang, Chun-Ya Lin, Chi-Ya Huang, Shang-Tzen Chang, Fu-Lan Hsu, and Ting-Feng Yeh

Subjects
Hot Temperature, Pharmaceutical Science, 02 engineering and technology, 01 natural sciences, Cinnamaldehyde, Analytical Chemistry, chemistry.chemical_compound, Drug Stability, Cinnamomum osmophloeum, Drug Discovery, Food science, Acrolein, Thermostability, chemistry.chemical_classification, Cyclodextrin, biology, beta-Cyclodextrins, food and beverages, 021001 nanoscience & nanotechnology, Chemistry (miscellaneous), Molecular Medicine, microencapsulation, 0210 nano-technology, trans-cinnamaldehyde, β-cyclodextrin, xanthine oxidase inhibitory activity, Xanthine Oxidase, Drug Compounding, Capsules, Article, Gout Suppressants, lcsh:QD241-441, lcsh:Organic chemistry, Humans, Plant Oils, Physical and Theoretical Chemistry, Xanthine oxidase, IC50, Cinnamomum, Enzyme Assays, Ethanol, Chemotype, 010405 organic chemistry, Organic Chemistry, fungi, biology.organism_classification, 0104 chemical sciences, Plant Leaves, chemistry
Abstract

The xanthine oxidase inhibitory activity and thermostability of Cinnamomum osmophloeum leaf oil microencapsulated with β-cyclodextrin were evaluated in this study. The yield of leaf oil microcapsules was 86.3% using the optimal reaction conditions at the leaf oil to β-cyclodextrin ratio of 15:85 and ethanol to water ratio ranging from 1:3 to 1:5. Based on the FTIR analysis, the characteristic absorption bands of major constituent, trans-cinnamaldehyde, were confirmed in the spectra of leaf oil microcapsules. According to the dry-heat aging test, β-cyclodextrin was thermostable under the high temperature conditions, and it was beneficial to reduce the emission of C. osmophloeum leaf oil. Leaf oil microcapsules exhibited high xanthine oxidase inhibitory activity, with an IC50 value of 83.3 µg/mL. It is concluded that the lifetime of C. osmophloeum leaf oil can be effectively improved by microencapsulation, and leaf oil microcapsules possess superior xanthine oxidase inhibitory activity.

Published
2018

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