Chongqing Academy of Chinese Materia Medica, Chongqing 400065, People's Republic of China.
Int J Biol Macromol. 2015 May;76:218-23. doi: 10.1016/j.ijbiomac.2015.02.043. Epub 2015 Mar 5.
Traditionally, people like to take dried finger citron fruits (FC) as adjuvant herbal medicines to treat a diversity of chronic diseases like asthma, hypertension and respiratory tract infections. Many healing properties are attributed to FC polysaccharides (FCPs), one of the main active ingredients of FC. Three drying methods, freeze drying (FDM), hot air drying (HDM) and vacuum drying methods (VDM) were comparatively studied on the physicochemical and antioxidant properties of FCPs. The results showed these FCPs were similar in UV and FT-IR spectrum. However, they showed significant differences (p<0.05) in yields of crude polysaccharides and contents of protein and ash. Compared with VDM and HDM, FDM resulted in the properties of FCPs with lower molecular weight distribution, higher reducing power and scavenging abilities on DPPH, OH, and O2(-). Available data obtained in vitro models suggested that FDM was an appropriate and effective treatment for obtaining crude polysaccharides from FC fruits. Hence, drying methods used for preparation of FCPs can affect physicochemical and associated functional properties.
传统上，人们喜欢将佛手干果实（FC）作为辅助草药，用于治疗哮喘、高血压和呼吸道感染等多种慢性疾病。FC 多糖（FCPs）是 FC 的主要活性成分之一，具有许多治疗特性。本研究比较了三种干燥方法（冷冻干燥（FDM）、热风干燥（HDM）和真空干燥（VDM））对 FCPs 的物理化学和抗氧化特性的影响。结果表明，这些 FCPs 在紫外和傅里叶变换红外光谱上相似。然而，它们在粗多糖的产率和蛋白质及灰分的含量上存在显著差异（p<0.05）。与 VDM 和 HDM 相比，FDM 导致 FCPs 的分子量分布较低、还原能力和对 DPPH、OH 和 O2(-)的清除能力较高。体外模型获得的可用数据表明，FDM 是从 FC 果实中获得粗多糖的一种合适且有效的处理方法。因此，用于制备 FCPs 的干燥方法会影响其物理化学和相关功能特性。
