orabase and 1-1-diphenyl-2-picrylhydrazyl

Carboxymethyl cellulose (CMC) based novel functional films containing Chinese chives root extract (CRE) at different concentrations (1, 3 and 5 % in w/w) were successfully fabricated. It was revealed by SEM that higher extract concentration triggered the formation of agglomerates within the film. Tensile strength of the films was decreased from 30.91 to 16.48 MPa. Thickness of films was increased from 43 to 84 μm, while decrease in water solubility from 77.51-52.91 %, swelling degree from 55.74 to 40.37 %, and water vapor permeability from 5.76 to 1.17 10

Topics: Anti-Bacterial Agents; Antioxidants; Benzothiazoles; Biphenyl Compounds; Carboxymethylcellulose Sodium; China; Chive; Food Packaging; Gram-Negative Bacteria; Gram-Positive Bacteria; Microbial Sensitivity Tests; Particle Size; Picrates; Solubility; Steam; Sulfonic Acids; Surface Properties

In this study functional film enrichment with antioxidant of bamboo leaves (AOB) was prepared based on carboxymethyl cellulose-gelatin (CMC-Gel) mixture using casting method. Microstructures of the films were performed on atomic force microscope, Fourier transform infrared spectrometer, and X-ray diffraction (XRD). The physical properties, including the viscosity of film forming solutions, the water vapor permeability, mechanical properties, thermodynamics and transparence of CMC-Gel films were determined. The addition of AOB had not induced notable change on the surface structure features. The good compatibility among AOB, CMC and gelatin was illustrated by XRD for that the crystallization disappeared of gelatin in CMC-Gel composite film and no diffraction peaks in functionalized films. Viscosity and glass transition temperature of the film with 0.2% AOB were 779.2 ± 26.2 mPa·s and 83.24 °C, respectively, which were higher than those of all other samples. The water vapor permeation resistance and elongation at break of the films significantly decreased when the concentration of AOB exceeded 0.2%. The light barrier properties and scavenging rate of DPPH radicals were enhanced with the increasing of AOB content. Consequently, the antioxidant films utilized for food packaging could protect food quality from the destruction of heat, mechanical force, light, and oxidative free radicals.

Topics: Antioxidants; Biphenyl Compounds; Carboxymethylcellulose Sodium; Food Packaging; Gelatin; Permeability; Picrates; Plant Leaves; Spectroscopy, Fourier Transform Infrared; Steam; Viscosity; Water; X-Ray Diffraction

Carboxymethyl cellulose used in wounds has little antioxidant capacity. The aim of the present study was to improve the scavenging ability of carboxymethyl cellulose by modified with collagen peptide. The reaction conditions have been optimized by varying mass ratio of collagen peptide to carboxymethyl cellulose, temperature and reaction time. Antioxidant activities of carboxymethyl cellulose derivatives (CMCC) were evaluated using 1,1-diphenyl-2-picrylhydrazyl (DPPH), hydroxyl, superoxide radicals and the reducing power. The effects of concentration, degree of substitution (DS) and molecular weight on three different radicals scavenging activity and reducing power were examined. Methylthiazol tetrazolium (MTT) assay was used to evaluate the fibroblasts cells cytotoxicity of CMCC. Results showed that the scavenging effects of CMCC increased with the increasing of DS and concentration. This product of CMCC possesses a distinct antioxidant capacity on radicals.

Topics: Animals; Antioxidants; Biphenyl Compounds; Carboxymethylcellulose Sodium; Cell Line; Chemistry Techniques, Synthetic; Collagen; Fibroblasts; Free Radical Scavengers; Molecular Weight; Picrates; Rats; Spectroscopy, Fourier Transform Infrared; Structure-Activity Relationship; Temperature