Anti-AHSG monoclonal antibody, clone 3I3

Due to applications of silver nanoparticles (Ag NPs) especially in advanced science fields, it is important to produce Ag antibacterial nanocomposites with enhanced antibacterial activity and reusability. Over the past decade researches about natural polymers have emphasized the use of them as nanoparticles coating. In this work, a novel core-shell antibacterial agent was synthesized through a three-step procedure. Fe3O4 nanoparticles (Fe3O4 NPs) were synthesized and coated with a natural polymer called Alyssum homolocarpum seed gum (AHSG). Ag NPs were immobilized on the AHSG resulting in formation of the new nanocomposite with improved antimicrobial properties. The immobilization of AgNPs prevents the release of toxic Ag+ ions. The Fe3O4@AHSG@Ag nanocomposite could easily be separated from medium using an external magnetic field due to presence of the Fe3O4 superparamagnetic nanoparticles. The as-synthesized nanocomposite was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, vibrating sample magnetometer and dynamic light scattering. The results showed that the magnetic nanocomposite was synthesized and coated successfully. Finally, results of disk diffusion method demonstrated that the nanocomposite exhibits excellent antibacterial activity against gram-positive and gram-negative bacteria. (c) 2019 Elsevier B.V. All rights reserved.

The ability to modify food and increase the shelf life by enhanced stability using nonthermal process is of interest to many food companies. Here, we investigate the effects of high hydrostatic pressure (HHP), as a nonthermal process, at various pressure levels (200, 400, and 600 MPa for 30 min) on the functional properties of aqueous dispersions ofAlyssum homolocarpumseed gum (AHSG). In this regard, the rheological properties, foam stability, and emulsion stability of the HHP-treated gums were analyzed and compared. Dynamic oscillatory test indicated that the HHP-treated gums had more gel-like behavior than viscous-like behavior (storage modulus > loss modulus) at designated pressures. When AHSG was treated by HHP, both elastic (G ') and viscous (G '') moduli were increased compared to the native AHSG. The native- and HHP-treated gums exhibited a shear-thinning (pseudoplastic) behavior. Furthermore, the pressure levels have a significant effect on consistency coefficient, flow behavior index, and yield stress (p < .05) of AHSG. The results showed that the HHP-treated gums lead to improve the foam and emulsion stability of AHSG. Finally, we assume that HHP-treated AHSG improves texture in the food materials.