02226nab a2200301 i 4500 BR-BrBNA 20260407053309.0 260407b2019 bl.qr|pooa||| 00| 0 eng | BR-BrBNA eng Q02 3290 U10 2790 Bastos, Alefe Viana Souza Amaral, Alisson Macendo Gomes, Flávio Henrique Ferreira Xavier, Warlles Resende, Osvaldo Drying Kinetics of Cecropia pachystachya Leaves Publicação on-line; 49 ref.; 5 tables; 2 illus.; Summary (En) ABSTRACT The species Cecropia pachystachya has important medicinal purposes and its leaves have been used in pharmaceutical research, so the drying of this product may help maintaining its chemical properties and ensure safe storage. Thus, the objective of this study was to select mathematical models to represent the drying kinetics of Cecropia pachystachya leaves, determine the effective diffusion coefficient and obtain the activation energy during drying at different temperatures. Leaves were dried in an oven under five temperature conditions (40, 50, 60 and 70 °C), until reaching hygroscopic equilibrium moisture content. Among the models analyzed, the Logarithmic model best represented the drying kinetics at temperatures of 40 and 60 °C, whereas Modified Henderson & Pabis and Dryceleaves represented temperatures of 50 and 70 °C, respectively. The effective diffusion coefficient increased with increasing air temperature, and the activation energy for liquid diffusion in the drying process was 64.53 kJ mol-1. Keywords: activation energy, embaúba, liquid diffusion, mathematical models, technology of forest products. EMBAÚBA SECAGEM MODELO MATEMÁTICO PLANTA MEDICINAL 2929 347952 Rio de Janeiro-RJ Instituto de Florestas - UFRRJ 1994 2025-0451 Floresta e Ambiente (Brazil) 1415-0980 / ISSN 2179-8087 0nline v. 26(3) p. 1-9; (2019) BR2026000296 https://www.scielo.br/j/floram/a/VDHQH5BN3dpH6GxgJNwPczj/?format=pdf&lang=en ANA 341259 341259