Rendimento pós-secagem de plantas medicinais.

Abstract

The study investigated the post-drying yield of four medicinal species: ora-pro-nobis (Pereskia grandifolia Haw), plant insulin (Cissus verticillata (L.) Nicolson & C.E.Jarvis), lemongrass (Cymbopogon citratus (DC.) Stapf) and peppermint (Mentha piperita L.). The research covers everything from the collection and preparation of the plants to the analysis of the impacts of drying on their physical characteristics, yield and therapeutic properties. The results show that drying, essential to preserve the compounds, had a varied impact among the species. Lemongrass showed greater stability in structure and color, being economically viable, while plant insulin showed greater weight loss. Changes in texture and color were significant in peppermint and ora-pro-nobis, suggesting degradation of the compounds of each plant. Statistical analysis confirmed significant differences in weight loss among the species and drying periods, but not between the time intervals. Recommendations include adjustments to drying conditions, such as lower temperatures to preserve sensitive compounds, as well as standardizing handling and exploring alternative methods, such as controlled air drying. These improvements can improve the final quality and economic use of the plants.