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Collection of essential oil directly from secretory cavities of Citrus fruit peel using microcapillaries. A, Custom-made glass microcapillary (i.d. 75 ± 15 µm). B, Citrus peel section with secretory cavity. C, Citrus peel section after collection of secretory cavity contents with a microcapillary. Note that the cells surrounding the cavity are mostly undamaged.
