Effect of defatted flaxseed gum powder addition on the quality of sesame paste

Abstract

The study explored the influence of defatted flaxseed gum powder (DFGP) on the stability and quality of sesame paste by measuring and analyzing its composition, color, texture, particle size, centrifugal oil separation rate, rheological properties, and microstructure. The results showed that the moisture and polysaccharide content of sesame paste was increased as the DFGP increased. Additionally, the hardness, adhesiveness, and chewiness of the sesame paste was improved, while the presence of particles with small particle size (1–100 ​μm) was decreased. The rate of oil precipitation was reduced by 28.99% when the amount of DFGP was 6%. The sesame paste samples exhibited pseudoplastic behavior, demonstrating shear thinning. As the shear rate increased, the apparent viscosity of sesame paste gradually decreased. Both the storage modulus (G′) and the loss modulus (G″) increased as the shear frequency increased. The microstructure observation revealed that protein and oil were evenly distributed in the sesame paste system, and the addition of DFGP enhanced the bonding between oil and protein. This study can provide valuable references for high-quality sesame paste products in the food industry.