The methods AOAC (Association of Official Analytical Chemists) (Tobaruela et al., 2018) 991.43 is a traditional DF analysis method, mainly analyzing insoluble and soluble higher molecular weight dietary fiber (HMWDF), while methods AOAC 2011.25 is a new dietary fiber analysis method. This method can not only analyze the content of TDF, but also the content of IDF, SDF and resistant starch (RS) (Tobaruela et al.,

Pickering emulsions stabilized by polysaccharide particles have attracted extensive research interest in the food, biopharmaceutical and cosmetic industries due to their ability to edibility, protect bioactive substances, and control the release of bioactive substances. This paper reviewed research progress in using natural polysaccharides, modified polysaccharides by physical or chemical method and polysaccharide complexes as particles to form and stabilize Pickering emulsions. In particular, the application of Pickering emulsions stabilized polysaccharide particles in encapsulation and delivery of food bioactive ingredients, fat substitutes, and modulation of lipid digestion, was discussed. Finally, the future prospects of Pickering emulsions stabilized by polysaccharide particles were discussed.

Polysaccharides and anthocyanins are one of the main components of many foods, and their interaction affects the texture and nutrition of foods. The anthocyanin-polysaccharide complex was prepared from anthocyanin of plum (Prunus salicina Lindl. cv. Furong) and polysaccharide of Tremella fuciformis. The structure changes of anthocyanin and polysaccharide before and after interaction were investigated by UV-visible spectroscopy, infrared spectroscopy and scanning electron microscopy.The absorption peak at 510 nm of anthocyanin-polysaccharide complex weakened at pH 5.0, and the intensity of absorption spectrum increased with the concentration of polysaccharide. The absorption peaks of anthocyanin-polysaccharide complexes were shifted in the infrared spectral curve of anthocyanin, and the formation of complex was caused by electrostatic interaction and hydrogen bond interaction between anthocyanin and polysaccharide. From microstructural analysis, anthocyanin and polysaccharide were effectively bound together. This can provide theoretical guidance for the structural design of anthocyaninpolysaccharide food and the development and utilization of new food ingredients.

The eutectic point and drying curve of food multicomponent materials are the key to improve the efficiency of freeze-drying. The eutectic point, co-melting point, pre-freezing time, heating temperature and freeze-drying curve of Tremella fuciformis containing sucrose were investigated. The eutectic point and co-melting point temperature of materials were -15.49 °C and -8.35 °C respectively measured by differential scanning calorimetry (DSC). At the pre-freezing temperature of -25 °C for 3.5 h, the moisture of the sample was completely transformed into glassy ice. Different heating temperatures were set in sections during the drying process of multicomponent materials. The best heating temperature was 80°C for 3 hours, then 70 °C for 5 hours, then 60 °C for 12 hours, and finally 50 °C to constant dryness. Under the optimal operating conditions, Tremella fuciformis entered the desorption drying stage at the 8th hour, and the material could be dried to less than 5% moisture content at 25 h.