Abstract
Extraction of plant materials is an essential practice in various fields using natural compounds. Nevertheless, it is challenging to perform complicated extraction efficiently and consistently on materials with hard-to-crush structures. This work presents a new method called simultaneous stone-milling and extraction (SME) to achieve one-step extraction of hard materials. SME under its optimal conditions was confirmed to produce high quality extracts from whole spice seeds (anise seeds, dill seeds, fennel seeds) and coarse-cut star anise. Compared to other extraction methods like maceration, heat-assisted extraction and ultrasound-assisted extraction, SME extracts contained comparable or higher concentrations of general (polyphenols, flavonoids, antioxidants) and specific (enzyme inhibitors) bioactive groups. Hence, SME with its one-step operation is expected to simplify the task of plant extraction and contribute to the advances in studies using plant-derived phytochemicals.
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