The Comparative Analysis of Peptides in Enteral Nutrition Products and Foods for Special Medical Purposes.

Enteral nutrition (EN) and foods for special medical purposes (FSMPs) can be used to meet the specific nutritional needs of patients. There are multiple types of EN products and nutritionally complete FSMPs on the market. The peptides in these products are important nutritional components, while their presence in different products remains unclear.

Isolation, Characterization, and Antioxidant Activity of Melanin from Auricularia auricula (Agaricomycetes).

The cell wall of Auricularia auricula fruit bodies is extremely tough, making it difficult to dissolve the melanin using the traditional preparation method. To investigate the efficient preparation of melanin and its resistance to oxidative stress, this paper first used ultrasound-assisted alkaline cellulase to optimize the optimal wall-breaking parameters through a Box-Behnken design based on a single-factor experiment. After optimization, the yield of melanin from A.

Analysis of the complexation process between starch molecules and trilinolenin.

Starch is a basic biomacromolecule, and an in-depth understanding of the process and mechanism of starch-lipid complexation has great significance for starch based food and pharmaceutical. In this study, molecular dynamics simulation was used to explore the complexation details between starch molecules and trilinolenin, such as complexation process, interaction forces, conformation changes and stability changes, which are difficult to be verified by using other characterization methods. The results show that, firstly, starch residues of one turn helix (8 residues) are enough to bind a trilinolenin molecule firmly.

Effect of repeated heat-moisture treatments on the structural characteristics of nanocrystals from waxy maize starch.

The effect of repeated heat-moisture treatment (RHMT) on the structural characteristics of waxy maize starch nanocrystals was investigated. Compared with native waxy maize starch (WMS), waxy maize starch nanocrystals (WMSNs) changed the crystalline pattern from A-type to B-type, and displayed the lower crystallinity (RC), molecular order (MO), enthalpy (∆H) and double-helix (DH) content, indicating a reduction in the long- and short-range orders of starch molecules. Single heat-moisture treatment significantly increased values, including RC, MO, α (power law exponent obtained by SAXS), ∆H, DH, and the melting temperatures (T, T and T), while repeated heat-moisture treatment further increased values of these parameters except ∆H, indicating the reinforcement of the long- and short-range orders of WMSNs.

The effects of HHP (high hydrostatic pressure) on the interchain interaction and the conformation of amylopectin and double-amylose molecules.

Starch is an important resource in nature, and HHP (high hydrostatic pressure) is one of the most important physical modification technologies. In this study, molecular dynamics simulation was used to explore the interchain interaction and the changes of molecule conformations of amylopectin and double-amylose helix at atomic level in different pressure. The results shown that, firstly, high pressure increased the content of 4C1 chair conformation, decreased the RMSD (root mean square deviations) and RMSF (root mean square fluctuation), made molecules more stable.

Adsorption capacity and cold-water solubility of honeycomb-like potato starch granule.

Honeycomb-like granules, with 2-4 μm pores on the surface, were prepared by heating potato starch suspensions in water at the pasting temperature. These granules with a yield of 84% were most amorphous (relative crystallinity 1.9%).