不同干燥方法对雪胆湿法改性膳食纤维品质的影响  

Effects of Different Drying Methods on the Quality of Dietary Fiber Modified by Wet Process of Hemsleya chinensis

作　　者：高青青 刘娟[1] 李霞[1,2] 陈庚 唐卿雁 赵艳 GAO Qingqing;LIU Juan;LI Xia;CHEN Geng;TANG Qingyan;ZHAO Yan(The Key Laboratory of Medicinal Plant Biology of Yunnan Province/National&Local Joint Engineering Research Center on Germplasm Innovation&Utilization of Chinese Medicinal Materials in Southwestern China,Yunnan Agricultural University,Kunming,Yunnan 650201,2.College of Agronomy and Biotechnology,Yunnan Agricultural University,Kunming,Yunnan 650201)

机构地区：[1]云南农业大学云南省药用植物生物学重点实验室,西南中药材种质创新与利用国家地方联合工程研究中心,云南昆明650201 [2]云南农业大学农学与生物技术学院,云南昆明650201

出　　处：《北方园艺》2023年第6期80-86,共7页Northern Horticulture

基　　金：国家自然科学基金资助项目(81960691)。

摘　　要：以雪胆块茎中湿法改性的膳食纤维为研究对象,通过热风干燥、微波干燥、真空冷冻干燥和喷雾干燥4种干燥方式处理,考察不同的干燥方式对样品色泽形态和理化性质的影响,以期为雪胆块茎的干燥及后续加工提供参考依据。结果表明:4种干燥方法处理后,雪胆膳食纤维的色泽形态与理化性质间存在明显差异。其中,真空冷冻干燥处理后的雪胆膳食纤维色泽较白,疏松多孔;除膨胀力以外,真空冷冻干燥样品的吸湿率,持水力和持油力均显著优于其它3种干燥方式,分别为吸湿率60.1%,持水力3.31 g·g^(-1),持油力4.51 g·g^(-1)。热风干燥的膨胀力最大,为1.36 mL·g^(-1)。真空冷冻干燥的阳离子交换能力和吸附胆固醇能力也均优于其它3种干燥方法。因此,真空冷冻干燥既能最大程度上保持雪胆膳食纤维的色泽形态,又具有高吸湿率、高持水力和高持油力。因此,真空冷冻干燥是获得高品质雪胆膳食纤维的较优选择。Taking the wet modified dietary fiber from Hemsleya chinensis as the research object,through four drying methods of hot air drying,microwave drying,vacuum freeze drying and spray drying,the effects of different drying methods on the color,morphology and physical and chemical properties of samples were investigated,in order to provide reference for the drying and subsequent processing of snow gall tubers.The results showed that dietary fiber treated with four different drying methods exhibited different color morphology and physicochemical properties.The H.chinensis diet fiber,after vacuum freeze-drying treatment,had a white color and was loose and porous.The vacuum freeze-dried samples performed significantly better for moisture uptake,holding force,and oil holding force than those from the other three drying modes,which were as follows,60.1%moisture absorption,3.31 g·g^(-1)water-holding capacity,and 4.51 g·g^(-1)oil-holding capacity.Hot air drying had the greatest swelling capacity of 1.36 mL·g^(-1).Vacuum freeze-drying had a superior cation exchange capacity and adsorption capacity for cholesterol compared to the other three drying methods.Therefore,vacuum freeze-drying could enhance the color and morphology of dietary fiber as well as provide higher moisture absorption,higher water holding capacities,and higher oil absorption capacities.Thus,vacuum freeze-drying was a preferred method of obtaining high-quality H.chinensis dietary fiber.

关 键 词：雪胆块茎 干燥方法 膳食纤维 湿法改性 特性 品质 

分 类 号：R282[医药卫生—中药学]