57results about How to "Lower zeta potential" patented technology

Methods and systems for enhancing of quality of liquid by treating a source liquid to enhance the concentration of low zeta potential crystals and produce a treated liquid having a higher concentration of low zeta potential crystals that that of the source liquid. The inventive system comprises an aqueous liquid source having a threshold concentration of selected minerals and a low zeta potential crystal generator for treating the aqueous source liquid to produce treated liquid having an enhanced concentration of low zeta potential crystals, and at least one filtration device for substantially removing bacteria, viruses, cysts, and the like from the treated source liquid.

The invention discloses a new method suitable for large-scale high-efficiency purification of a water soluble quantum dot-IgG monoclonal antibody conjugate, and belongs to the field of biotechnology. In allusion to the disadvantages that a conventional quantum dot-antibody conjugate has complex purification process and low recovery rate and difficultly realizes large-scale production, glucosamine is adopted to seal residual carboxyl of the quantum dot-antibody conjugate, a surface zeta potential of the conjugate is reduced; by adjusting the pH value of a solution to 4.5-5.0, the net charge content of the conjugate in the solution is further reduced, and the large-scale high-efficiency purification of the quantum dot-antibody conjugate is achieved by an ordinary high-speed centrifugation method. The method simplifies experimental operation procedures of the quantum dot-antibody conjugate, reduces requirements on separation equipment, is suitable for large-batch purification of the quantum dot-IgG monoclonal antibody conjugate, allows the yield to be more than 85%, and allows fluorescence characteristics and biological activity of the conjugate to have no significant changes.

The invention discloses a paint mist coagulant suitable for water-based paint and a preparation method thereof. The paint mist coagulant is composed of A agent and B agent, wherein, the components of A agent are: water, organic bentonite, polyferric sulfate, sodium hydroxymethyl cellulose and defoamer; the components of B agent are: hydrophilic Oil-based polyacrylamide solution, C12‑C16 alkane mixture, organic bentonite and polyferric sulfate double emulsifier in agent A can combine with water-based paint base and solvent faster to form charged flocs; agent B uses lipophilic group The modified polyacrylamide is used as a flocculant to form multi-nuclear complex ions, so it can be strongly adsorbed to flocculate the particles and effectively reduce COD. In the present invention, agent A and agent B are placed at the same dosing point (the return port of circulating water, the distance between the two is about 20 cm), which improves the time and speed of paint slag agglomeration, and can achieve better and more efficient paint. Water separation effect.