Effects of Green Extraction Methods on Antioxidant and Antimicrobial Properties of Artichoke (Cynara scolymus L.) Leaves

Artichoke leaves, often discarded as waste, hide a powerful secret: they're packed with antioxidants and antimicrobials—and now, science has found the greenest way to unlock them.

Artichoke leaves are more than just kitchen scraps—they're a treasure trove of bioactive compounds. But extracting these valuable molecules has often relied on harsh, energy-hungry methods. A new study set out to change that, comparing eco-friendly techniques like microwave, ultrasound probe, and ultrasound bath against the traditional maceration method.

The researchers kept the temperature steady at 50 °C to protect the delicate compounds from heat damage. They tested different power levels, times, and modes—continuous or pulsed—for each method. Then, they measured the total phenolic and flavonoid content, antioxidant capacity, and antimicrobial activity using advanced tools like LC-QTOF-MS and agar diffusion tests.

The results were clear: microwave-assisted extraction outperformed all other methods at both power levels, and it did so in the shortest time. This means less energy, less time, and more effective extraction—a win for both science and sustainability.

This research highlights that the choice of extraction method matters greatly. By optimizing green technologies, we can turn waste into valuable resources, paving the way for natural preservatives and health-boosting compounds from a humble leaf.

Key Points

• Microwave extraction beats maceration and ultrasound methods.
• Bioactive compounds depend heavily on extraction parameters.
• Green methods offer faster, efficient antioxidant and antimicrobial recovery.