Influences of drying methods on the structural, physicochemical and antioxidant properties of exopolysaccharide from Lactobacillus helveticus MB2-1

Pilot scale isolation of exopolysaccharides from Streptococcus thermophilus DGCC7710: Impact of methodical details on macromolecular properties and technofunctionality

“…To determine the molecular mass of EPS in medium isolates, they were suspended in deionised water, followed by centrifugation for cell removal and dialysis against deionised water. We found that the molecular mass distribution was neither altered by spray drying nor by freeze drying, which is in line with a study on EPS from Lactobacillus helveticus where even higher inlet (160°C) and outlet (80°C) temperatures were applied during spray drying compared to our study (140°C and 58–62°C, respectively) [37]. For plant polysaccharides, however, a significant decrease of the molecular mass was observed already at lower temperatures by using spray drying with a rotary atomizer (inlet temperature 150°C and outlet temperature 78°C) or drying in an oven (12 h at 75°C) [46, 47].…”

“…The intense broad peak at approx. 3300/cm observed for all isolates corresponds to the ν(O–H) stretching vibration [36,37]. The absorption band at 2928/cm was much more pronounced for cell‐containing isolates and can be attributed to the stretching of ν(C–H) from polysaccharides or fatty acids from cell membranes [38,39].…”

Effects of combined ultrasonic and microwave vacuum drying on drying characteristics and physicochemical properties of Tremella fuciformis

“…This may be related to the degree to which polysaccharides are heated. Xiao et al [44] investigated the effect of three drying methods on the rheological properties of exopolysaccharides. The results showed that the chain expansion of polysaccharides increased the volume of molecules when polysaccharides were heated, which strengthened the thermal movement between molecular chains, weakened the interaction between molecules, and led to a decrease in viscosity.…”

Ultrasound-assisted covalent reaction of myofibrillar protein: The improvement of functional properties and its potential mechanism

“…Metal ion chelating activities of MP solution with different concentrations (0, 0.01, 0.1, 1, 3 and 5 mg/mL) were performed by the method of Xiao et al [30] . MP solution (1.0 mL), deionized water (2.75 mL), iron zinc solution (0.2 mL, 5 mM), and ferrous chloride (FeCl 2 ) solution (0.05 mL, 2 mM) were mixed, and then stored at 25 °C for 10 min.…”