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Syzygium Aromaticum, Curcuma Longa, and Lavandula: Volatile Components and Antioxidant Activities
Published in Amit Baran Sharangi, K. V. Peter, Medicinal Plants, 2023
Odor components of LA and LX flowers in summer and autumn were identified by TD-GC-MS using PDMS/CAR-coated fiber. Linalool, terpinen-4-ol, β-caryophyllene, β-myrcene, β-ocimene, and α-ocimene were predominant components of LA and LX in both summer and autumn. α-Humulene was obtained from LA, and eucalyptol, camphor, borneol, and γ-cadinene were detected from LX. Limonene, cryptone, and bornyl acetate were obtained from LA in summer; hexyl acetate and α-terpinolen were obtained from LX in summer; and α-terpineol was obtained from LX in autumn. Lavandulyl acetate and trans-α-bergamotene were obtained in summer from both LA and LX (Table 6.5).
Development of a continuous reactor for emulsion-based microencapsulation of hexyl acetate with a polyuria shell
Published in Journal of Microencapsulation, 2019
Sven R. L. Gobert, Marleen Segers, Stijn Luca, Roberto F. A. Teixeira, Simon Kuhn, Leen Braeken, Leen C. J. Thomassen
The encapsulation of an oil, like hexyl acetate, with polyurea is an adequate technique to be performed in flow, because of its emulsion stability, minimal fouling and the short curing time required. Furthermore, the hexyl acetate droplets do not present coalescence during the fast temperature increase in the continuous curing, reducing the curing time by 50%. The emulsification itself is implemented by turbulent flow and enables the production of large amounts of droplets at once. However, the capsule size distribution is strongly dependant on the uniformity of the shear stresses acting on the droplets. The performance of the presented setup is compared to emulsification devices reported in literature, see Table 1. The parameters discussed include emulsion concentration and dispersed phase flow rate, and the obtained results of mean diameter and covariance. All the presented results in Table 1 are derived from number-based droplet size measurements and only oil-in–water-type emulsification are considered, ensuring a fair comparison of data. The devices in Table 1, other than the reactor currently presented, make no use of continuous curing. Theron et al. (2012) is, to the authors knowledge, the only publication that presented continuous encapsulation in a single setup, but used volume-based distributions and Sauter mean diameter to present their findings. This reference is therefore not included with the current results (Theron et al.2012).