Natural Products

Extraction of oils from mint leaves and other materials of biological origin is a patented process known as the 'microwave-assisted process'. Other reports on MAE of natural products include that of Young, Bichi et al. and Mattina et al. Young extracted ergo-sterol from fungi and spores by MAE with methanol and 2 m sodium hydoxide. Bichi et al. extracted pyr-rolizidine alkaloids from Senecio palvadosos and Senecio cordatus dried plants by MAE with methanol at 65 to 100°C for 20 to 30 min. Mattina et al. reported on the extraction of taxanes from Taxus biomass by MAE with ethanol. Using 5 g of freshly harvested needles (moisture content 55 to 65%) soaked in 5 mL of water prior to MAE and 10 mL ethanol at 85°C for 9 min resulted in about 90%

recovery. This procedure would significantly reduce the costs of the extraction of taxanes from biomass with no reduction in the extraction yields.

See also: II/Extraction: Supercritical Fluid Extraction; Ultrasound Extractions. III/Environmental Applications: Soxhlet Extraction. Solid-Phase Extraction with Disks.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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