Color has emerged as a pivotal factor influencing consumer purchasing decisions in the dried herbal medicine market.To address the issue of significant discoloration of Rhubarb(Rheum rhabarbarum L.)during the drying p...Color has emerged as a pivotal factor influencing consumer purchasing decisions in the dried herbal medicine market.To address the issue of significant discoloration of Rhubarb(Rheum rhabarbarum L.)during the drying process,this study investigates the effects of microwave fixation(MF)and hot-air fixation(HAF)pretreatment methods on the drying characteristics and quality of Rhubarb by ultrasonic synergistic vacuum far-infrared drying(U-VFID),with a primary focus on its color attributes.The results indicate that fixation pretreatment significantly enhances both drying efficiency and product quality,particularly in terms of color retention.Compared to unpretreated Rhubarb,the best comprehensive drying effect was achieved with MF treatment at 60℃for 7 min,which resulted in a 441.18%increase in rhein content,a 58.57%reduction in drying time,and a 48.38%decrease in theΔE value.Furthermore,correlation analysis,and the eXtreme Gradient Boosting(XGBoost)algorithm combined with SHapley Additive exPlanations(SHAP)model,revealed that the color of Rhubarb subjected to various fixation pretreatments in conjunction with U-VFID is primarily influenced by sennoside A content,total phenolic content(TPC),and drying time.This study offers a scientific foundation and theoretical insights for optimizing the quality of dried medicinal plant products and introduces innovative approaches for post-harvest industrial pretreatment of rhizomatous medicinal plants.展开更多
基金supported by the Young Mentor Fund project of Gansu Agricultural University[grant number 0522014]the Gansu Provincial Science and Technology Plan[grant number 23CXNA0017].
文摘Color has emerged as a pivotal factor influencing consumer purchasing decisions in the dried herbal medicine market.To address the issue of significant discoloration of Rhubarb(Rheum rhabarbarum L.)during the drying process,this study investigates the effects of microwave fixation(MF)and hot-air fixation(HAF)pretreatment methods on the drying characteristics and quality of Rhubarb by ultrasonic synergistic vacuum far-infrared drying(U-VFID),with a primary focus on its color attributes.The results indicate that fixation pretreatment significantly enhances both drying efficiency and product quality,particularly in terms of color retention.Compared to unpretreated Rhubarb,the best comprehensive drying effect was achieved with MF treatment at 60℃for 7 min,which resulted in a 441.18%increase in rhein content,a 58.57%reduction in drying time,and a 48.38%decrease in theΔE value.Furthermore,correlation analysis,and the eXtreme Gradient Boosting(XGBoost)algorithm combined with SHapley Additive exPlanations(SHAP)model,revealed that the color of Rhubarb subjected to various fixation pretreatments in conjunction with U-VFID is primarily influenced by sennoside A content,total phenolic content(TPC),and drying time.This study offers a scientific foundation and theoretical insights for optimizing the quality of dried medicinal plant products and introduces innovative approaches for post-harvest industrial pretreatment of rhizomatous medicinal plants.
