Agnihotri Vasudha, Adhikari Priyanka, Pandey Neha, Sati Priyanka, Pandey Anita
Centre for Land and Water Resource Management, G.B. Pant National Institute of Himalayan Environment and Sustainable Development, Kosi-Katarmal, Almora, 263643, Uttarakhand, India.
Center for Environmental Assessment and Climate Change, G.B. Pant National Institute of Himalayan Environment and Sustainable Development, Kosi-Katarmal, Almora, 263 643, Uttarakhand, India.
Heliyon. 2020 Apr 18;6(4):e03220. doi: 10.1016/j.heliyon.2020.e03220. eCollection 2020 Apr.
Influence of drying temperature (30-50 °C) and relative humidity (RH: 30-80%) on moisture content, energy requirement and quality of leaves with respect to chemical markers namely Ginkgolide A (GA) and Bilobalide (BB), and microbial load of dried materials has been analyzed. Leaves were dried in climate control chamber with varying temperature and relative humidity (RH). Total time required for attaining equilibrium was higher for low temperature at all the RH levels as well as for high RH at all the temperatures. Energy requirement was found to increase at high RH and low temperature. GA and BB concentration increased during drying in comparison to that in fresh material. Microbial load analyzed for dried samples was also found within the limit as prescribed in European Pharmacopeia under the category 3B. 40 °C temperature and 50 % RH with less drying duration was observed as suitable conditions for better recovery of BB and GA content, less microbial load and less energy consumption, during drying of leaves.
研究了干燥温度（30 - 50°C）和相对湿度（RH：30 - 80%）对叶片水分含量、能量需求以及叶片质量（以化学标志物银杏内酯A（GA）和白果内酯（BB）衡量）的影响，并分析了干燥物料的微生物负荷。叶片在具有不同温度和相对湿度（RH）的气候控制室内进行干燥。在所有RH水平下，低温时达到平衡所需的总时间较长；在所有温度下，高RH时达到平衡所需的总时间也较长。发现能量需求在高RH和低温时会增加。与新鲜物料相比，干燥过程中GA和BB的浓度增加。对干燥样品分析的微生物负荷也在欧洲药典3B类规定的限度内。在叶片干燥过程中，40°C温度和50%RH且干燥时间较短被认为是能更好地回收BB和GA含量、降低微生物负荷以及减少能量消耗的适宜条件。
