Abstract The aromatic perennial plant Alpinia zerumbet (Pers.) Burtt & Smith (Zingiberaceae) is widely distributed in the tropical and sub-tropical regions of Japan, from southern Kyushu to the Ryukyu Islands. Its essential oil has a distinct aroma and antioxidant activity but is expensive due to low extraction efficiencies. Applying underwater shockwave pretreatment to A. zerumbet leaves is expected to enable more effective essential oil extraction during subsequent steam distillation. Thus, we subjected A. zerumbet leaves to shockwave pretreatment and analyzed its effects on the essential oil yield and components. Multiple cracks formed in the cell walls via spalling destruction induced by the shockwaves, creating permeation pathways that improved the passage of water vapor and greatly increased the essential oil yield. Moreover, the pretreatment increased the antioxidant activity of the essential oil and its water extract. Underwater shockwave processing selectively and effectively destroyed the fiber and/or cell structures of the leaves, resulting in efficient essential oil extraction. This novel process has the potential for application to many extraction processes, such as the extraction of compounds from medicinal plants. The dynamic control of instantaneous high pressures based on underwater shockwaves could pave the way for a new field of industrial technology.

中文翻译：

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水下冲击波预处理​​提高姜科山姜精油产量和抗氧化活性

摘要 多年生芳香植物山姜 (Pers.) Burtt & Smith (Zingiberaceae) 广泛分布于日本的热带和亚热带地区，从九州南部到琉球群岛。它的精油具有独特的香气和抗氧化活性，但由于提取效率低而价格昂贵。将水下冲击波预处理​​应用于 A. zerumbet 叶子有望在随后的蒸汽蒸馏过程中更有效地提取精油。因此，我们对 A. zerumbet 叶子进行了冲击波预处理​​，并分析了其对精油产量和成分的影响。通过冲击波引起的剥落破坏在细胞壁上形成多处裂缝，形成渗透通路，改善水蒸气的通过，大大提高精油产量。而且，预处理增加了精油及其水提取物的抗氧化活性。水下冲击波处理选择性地、有效地破坏了叶子的纤维和/或细胞结构，从而有效地提取精油。这种新工艺有可能应用于许多提取工艺，例如从药用植物中提取化合物。基于水下冲击波的瞬时高压动态控制可以为工业技术的新领域铺平道路。这种新工艺有可能应用于许多提取工艺，例如从药用植物中提取化合物。基于水下冲击波的瞬时高压动态控制可以为工业技术的新领域铺平道路。这种新工艺有可能应用于许多提取工艺，例如从药用植物中提取化合物。基于水下冲击波的瞬时高压动态控制可以为工业技术的新领域铺平道路。