Physicochemical properties of xylan, calcium, iron, and zinc complexes and their synergistic probiotic effects.

Xylan (Xyl) were used as raw materials to prepare xylan-mineral complexes by chemical synthesis modified by metal elements, and their physical and chemical properties were determined by the determination of metal element content, ash content, basic chemical composition, molecular weight, monosaccharide composition, particle size and viscosity, and their synergistic probiotics were studied by response surface optimization method. Results showed that the Ca content of the xylan-calcium complex (Xyl-Ca) was (7.57 ± 0.03) mg/ g, the Fe content of the xylan-iron complex (Xyl-Fe) was (6.26 ± 0.06) mg/ g, and the Zn content of the xylan-zinc complex (Xyl-Zn) was (3.21 ± 0.02) mg/ g. Metal complexation could reduce the sugar content of Xyl and cause differences in the composition of monosaccharides. The ash content, molecular weight, particle size, and viscosity of xylan and its metal complexes were in the following order: Xyl-Fe > Xyl-Ca > Xyl-Zn > Xyl. The optimal weight ratio of the composite xylan metal complex on the proliferation promotion of triple probiotics was Xyl-Ca:Xyl-Fe:Xyl-Zn = 8.9:9. 8:11.3, and the OD value of the culture medium was 1.125 5. Results suggested that Xyl-Ca, Xyl-Fe, and Xyl-Zn could be used as potential calcium-iron-zinc supplements for functional food and pharmaceutical applications, and were alternative derivatives of prebiotics for improving intestinal health or treating intestinal diseases. [ABSTRACT FROM AUTHOR]