4 results about "Colloidal silver" patented technology

This invention discloses a method for fabricating a SERS chip suitable for real-time detection in multiple scenarios, and the SERS chip itself. The method includes the following steps: Step S1, take an appropriate amount of colloidal silver solution and remove excess CTAB by centrifugation twice; Step S2, add a small amount of deionized water and sonicate to redisperse the solution; Step S3, take an appropriate amount of concentrated silver nanoparticle solution and drop it into the substrate groove; Step S4, after vacuum drying, the desired SERS chip is obtained. The SERS chip fabrication process of this invention is simple. The optimized drop casting method combined with a microgroove substrate design that resists the "coffee ring" effect enables uniform and dense deposition of nanoparticles. This process is easy to operate and has good reproducibility, laying a solid foundation for the large-scale and standardized production of high-performance SERS chips.

This disclosure provides methods of using an eco-friendly colloidal silver-based composition in preventing and reducing contamination caused by microorganisms in the plant tissue culture processes. The composition comprises colloidal silver, a copolymer, surfactant, a base, and water. The methods allow cultivating plants or explants in a plant tissue culture medium under non-aseptic conditions and thus obviate the need of the cumbersome and laborious procedures to sterilize the culture medium and the culture vessel in order to create aseptic conditions for plant or explant cultivation.

The invention relates to the technical field of veterinary drugs, and particularly discloses a colloidal silver and plant ear mite removing composite composition as well as a preparation method and application thereof. The composition is prepared from 0.1 wt%-0.5 wt% of colloidal silver, 0.1 wt%-0.5 wt% of 4-terpineol, 0.2 wt%-1 wt% of blumea oil, 10 wt%-30 wt% of a surfactant, 1.5 wt%-6 wt% of composite extracts (extracts of melia azedarach, geranium and hamamelis virginiana), 0.01 wt%-0.1 wt% of a complexing agent, 2 wt%-8 wt% of an organic solvent, deionized water and the like. Through synergism of all the components, the effects of resisting bacteria, killing mites, resisting inflammation and cleaning are achieved, and the problems of pet ear mite infection and ears are comprehensively solved. The invention also provides a preparation method of the composition, through step-by-step treatment, the activity of the components is ensured, and the stability and safety of the product are improved. The composition can be prepared into an ear mite removing product for pets, so that the ear health of the pets is effectively nursed.

The present invention relates to a bioactive scaffold comprising a silver-loaded antimicrobial composition, which acts as a therapeutic device, especially a scaffold, for wound healing and other applications related to the field of tissue engineering. The antimicrobial composition of the invention mainly comprises at least one absorbable matrix for cell-matrix and cell-cell interactions (a natural polymer), a calcium cross-linking component for forming a fibrin gel in situ, and a nanoemulsion containing colloidal silver nanoparticles as a bioactive compound to help control biofilm and infections in the wound. The structures comprising the antimicrobial composition act as dressings and means for aiding the healing of chronic wounds by assisting in infection management and / or improving the biological activity in chronic wounds.