Abstract Encapsulation efficiency of Cinnamomum zeylanicum essential oil (EO, at 5% v/v) in sodium alginate beads and its controlled release was determined. Composition of vapors generated by the beads was assessed by solid-phase microextraction. Water and EO released from the beads in the vapor phase were determined at 59% or 88% relative humidity at 4 °C or 25 °C. First and second order dynamic models appropriately described release mechanisms of water and EO, demonstrating Fickian behavior in both cases, in which diffusion mainly depends on EO concentration gradients. Encapsulation efficiency was 85.43% ± 4.97%, volatile components (cinnamaldehyde, caryophyllene, and α-caryophyllene) were detected in the vapor phase. Water and EO release rates were higher at the higher temperature, while a higher relative humidity led to lower water release but greater EO diffusion. Furthermore, enhanced antifungal (against Botrytis cinerea, Penicillium expansum, Alternaria alternata, or Colletotrichum gloeosporioides) activity of encapsulated EO was observed in vapor phase.

中文翻译：

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在气相应用过程中对包裹在藻酸盐珠中的肉桂（Cinnamomum zeylanicum）精油的释放机制进行建模

摘要 确定了玉米肉桂精油（EO，5% v/v）在海藻酸钠珠粒中的包封率及其控释。通过固相微萃取评估由珠子产生的蒸气的组成。在 59% 或 88% 相对湿度、4 °C 或 25 °C 条件下，测定了从气相中珠粒释放的水和 EO。一阶和二阶动力学模型恰当地描述了水和 EO 的释放机制，在这两种情况下都证明了 Fickian 行为，其中扩散主要取决于 EO 浓度梯度。包封率为 85.43% ± 4.97%，在气相中检测到挥发性成分（肉桂醛、石竹烯和 α-石竹烯）。水和 EO 的释放率在较高的温度下较高，而较高的相对湿度导致较低的水释放但较大的 EO 扩散。此外，在气相中观察到封装的 EO 增强的抗真菌（针对灰葡萄孢、膨胀青霉、链格孢或胶孢炭疽）活性。