6results about How to "Increase ionic strength" patented technology

The present invention provides a method for tenderizing eliminated laying hens with alternating dual-frequency ultrasound, comprising the following steps: pre-treating the breast meat of eliminated laying hens, and then using a tenderizer to perform coordinated ultrasound treatment, to obtain the result; the tenderizer includes calcium chloride and protease; the ultrasound is alternating dual-frequency ultrasound (22 / 40kHz). The ultrasonic device of the present invention adopts a concentric circle arrangement mode of ultrasonic vibrators, which can provide an external uninterrupted alternating dual-frequency ultrasonic physical field for the entire tenderizing process of eliminated laying hens, and maximize the penetration of calcium chloride and protease solution into the deep layer of muscle tissue. The former calcium chloride can increase the ion strength in the muscle, improve the ion distribution, and enhance the water retention of muscle fibers; the latter protease hydrolyzes and refines the muscle fibers, disintegrates the macromolecular protein of the muscle fibers, and reduces the shear force, thereby improving the tenderness of the eliminated laying hens.

A method for preparing an aqueous iron-based liquid flow battery negative electrode electrolyte and its application, belonging to the field of liquid flow battery energy storage. In the present invention, the electrolyte mainly comprises a multidentate ligand chelating agent, an iron-based salt, a supporting electrolyte and an auxiliary electrolyte. The multidentate ligand chelating agent is selected from one or more 1,2-cyclohexanediaminetetraacetic acid chemicals. 1,2-cyclohexanediaminetetraacetic acid chemicals have a wide range of coordination properties and can be well coordinated with Fe in an alkaline environment. 3+ / Fe 2+ The complexation forms a stable complex, inhibits the hydrolysis of Fe ions to form hydroxide precipitates, and has a high solubility, thus realizing a new alkaline all-iron negative electrode electrolyte with low cost, high energy density and high power density, which shows excellent cycle stability and has good application prospects in the field of liquid flow batteries.

The invention relates to the technical field of dyeing, and particularly discloses a bio-enzyme composite low-temperature dyeing process for wool fabrics, a plurality of effective components are used for embedding a composite bio-enzyme, then the composite bio-enzyme is added into a dye, the wool fabrics are dyed under a low-temperature condition, the embedded composite bio-enzyme can prevent the composite bio-enzyme from being inactivated in the dyeing process, and the dyeing quality is improved. Meanwhile, the fixation rate of the dye on the wool fabric can be improved through the slow release effect of the microcapsules. Through the synergistic effect of various effective components, the stability of the biological enzyme is improved, the dye uptake of the dye to the wool fabric is improved, the fixation rate of the dye to the wool fabric is improved, the dyeing temperature is reduced, and the dye is suitable for large-scale popularization and application.

This application relates to a low-alpha-ray silica and its preparation method. The method involves adding a high-purity sodium sulfate solution to water glass, followed by the sequential addition of dilute sulfuric acid solutions of varying concentrations for aging. The resulting precipitate is then calcined to obtain low-alpha-ray silica with Th ≤ 5 ppb and U ≤ 5 ppb. The sodium sulfate solution optimizes the precipitation process in two ways: first, it increases the ionic strength of the solution, compresses the colloidal double layer, and disrupts the metastable state of the system, thus promoting the aggregation and crystallization of the target precipitate; second, sulfate ions preferentially complex or inhibit the precipitation tendency of impurity cations based on the common ion effect; furthermore, the dilute sulfuric acid solution promotes the reaction and rapid precipitation of silicate ions with hydrogen ions, causing the Th and U ions encapsulated in the precipitate to precipitate out, thereby reducing the impurity content in the solution. This low-alpha-ray silica, due to its extremely low Th and U content and good thermal conductivity, can be widely used in high-performance and special-purpose chip packaging fields.

The present invention relates to the field of mass spectrometry, and in particular to a double helix ion funnel with an auxiliary electrode in ion transmission. The double helix ion funnel with an auxiliary electrode comprises two spiral electrodes, wherein the spiral electrodes have a constant inner diameter section and a conical inner diameter section connected to each other along the ion transmission direction, and four auxiliary electrodes are arranged at the outlet of the conical inner diameter section. The four auxiliary electrodes cooperate with the double helix electrode so that the positive / negative electrodes are arranged alternately, and a hexapole structure is formed at the outlet of the double helix ion funnel to improve the edge field. With the cooperation of the auxiliary electrode and the double helix electrode, the present invention greatly improves the influence of the edge field on the double helix electrode structure. The transmission efficiency of low and medium mass-to-charge ratio ions in the rough vacuum region is enhanced, and is almost unaffected by potential traps. At the same time, the ion strength is also enhanced, which helps to achieve a lower detection limit and higher sensitivity.

The invention relates to the technical field of new materials, in particular to a marine antifouling functionalized graphene-polyurethane composite coating, poly (dimethylaminoethyl methacrylate) enables a weak polyelectrolyte to show protein adsorption resistance under high solution pH and ionic strength, and under a marine high-salinity environment, the composite coating has good anti-fouling performance. The poly (dimethylaminoethyl methacrylate) introduced to the side chain of a polyurethane molecule is electrically neutral like zwitterions, the electrostatic interaction force is eliminated, the hydrophilic property of polyurethane can be improved by the poly (dimethylaminoethyl methacrylate) side group, and the good antibacterial property can be achieved, so that effective protein adsorption resistance can be achieved, and the antibacterial property of the polyurethane is improved. The graphene is introduced into the polyurethane matrix in a covalent grafting manner, so that the graphene can be well dispersed in the polyurethane matrix, and the well dispersed graphene can effectively enhance the mechanical property of the polyurethane due to the nano lamellar structure and excellent mechanical property.