7results about How to "High application potential" patented technology

This invention discloses a high-activity, heat-resistant α-glucan phosphorylase mutant and its applications, belonging to the fields of genetic engineering and modern enzyme technology engineering. This invention utilizes site-directed mutagenesis technology to modify the wild-type... α‑ Dextran phosphorylase was modified to construct a series of mutants. Compared with the wild-type enzyme, the enzyme activity was increased by 1.68 to 2.49 times, and the mutants had a wider range of adaptability to temperature and pH. Among them, the mutant R282Y / H506A showed excellent thermostability. After incubation at 60℃ for 132 h, its enzyme activity was still 50.96%, and after incubation at 70℃ for 60 h, its enzyme activity was still 53.71%. The significantly improved thermostability creates better conditions for the use of this enzyme in practical applications.

The present application relates to a kind of stability and good photocatalytic performance of lead-free double perovskite microcrystal and its preparation method and application, belong to the preparation technical field of perovskite microcrystal.The lead-free double perovskite microcrystal of the present application is mainly Cs4MnSb2Cl 12 Microcrystal or Cs4Mn 0.7 Cu 0.3 Sb2Cl 12 Any one in microcrystal.The lead-free double perovskite microcrystal of the present application has good photocatalytic performance, with excellent stability, high purity and other advantages, shows great application potential in photocatalysis field.In addition, the preparation method of the present application is simple, easy to operate, low in equipment requirements, low in cost, low in energy consumption, suitable for large-scale production.

The invention provides oil-based drilling cutting-based fluid-state solidified soil as well as a preparation method and application thereof, and belongs to the technical field of fluid-state solidified soil. The oil-based drilling cutting based flow state solidified soil is prepared from the following raw materials: 100 parts of pretreated oil-based drilling cutting, 10 to 15 parts of a composite curing agent, 1 to 3 parts of polymer latex, 2 to 4 parts of rubber particles, 0.2 to 0.4 part of basalt fiber, 0.5 to 1 part of magnesium oxide, 0.2 to 0.5 part of a flocculating agent, 0.4 to 0.6 part of a water reducing agent and 60 to 80 parts of water, the pretreatment method of the oil-based drilling cuttings comprises the following steps that the oil-based drilling cuttings are subjected to heat treatment after being subjected to preliminary dehydration; then, uniformly mixing the oil-based drilling cuttings subjected to heat treatment with quick lime and an ionic salt solution, and carrying out braising treatment; and then adding activated carbon and wood chips, and stirring at normal temperature for reaction to obtain the pretreated oil-based drilling cuttings. The oil-based drilling-cutting-based fluid-state solidified soil has good fluidity and excellent compressive strength and crack resistance, the problems that oil-based drilling cuttings occupy land and pollute the environment after being piled up for a long time are solved, and resource utilization of waste materials is achieved.

The application provides a simulation method and device for harmonic detection of cable joint interface pressure and a medium. The method comprises the following steps: modeling a simulation geometric model of a cable intermediate joint, and setting an ultrasonic excitation source; modeling through a nonlinear spring damper to obtain a cable joint pressure model; simulating nonlinear ultrasonic detection of the cable joint interface pressure, and obtaining a frequency spectrum diagram at each point probe. Through modeling of the nonlinear spring damper on the cable joint model, the nonlinear interaction at the interface of the cable intermediate joint is simulated, the change of the harmonic characteristics when the interface pressure changes is deeply explored by using the nonlinear harmonic detection principle, the relationship between the two is established, the state of the cable intermediate joint under various interface pressures is accurately simulated, the pressure at the interface of the cable intermediate joint is fully considered, and simulation analysis is performed on the cable joint interface pressure detection by establishing a new interface nonlinear model.

The invention discloses a single-layer super-structure lens covering zero to infinite total object distance. The single-layer super-structure lens comprises a transparent medium substrate; the nano-structure array is arranged on the substrate and consists of a plurality of nano-structure units; each nano structure unit comprises an external cuboid high-refractive-index medium main body and a cuboid cavity completely embedded in the high-refractive-index medium main body; the center of the cavity coincides with the center of the high-refractive-index medium body, and the long axis direction of the cavity has a design orientation angle relative to the x axis in the plane where the high-refractive-index medium body is located. By setting the design orientation angle distribution of the cavity, the metamaterial lens can generate a geometric phase modulated by the design orientation angle for incident circularly polarized light in the cross circular polarization channel, and generate a propagation phase determined by an electromagnetic resonance mode of the high-refractive-index medium main body in the same circular polarization channel. According to the invention, the super-structure lens can cover full-object-distance continuous real image imaging from zero to infinity without mechanical movement or complex stacking.

This invention discloses an implantable closed-loop neuromodulation system and method, relating to the field of neuroengineering, aiming to solve the problems of poor electrode adaptability and slow closed-loop response in existing implantable neuromodulation systems. The system includes intracranial electrodes, a one-to-one matching adapter plate for adapting different electrodes, a feedthrough component, and an implantable host fixed to the skull surface. The processing unit within the host decodes neural signals in real time within 10 ms to determine the brain state; if an abnormality is detected, the stimulation output unit selects a pattern from a preset safe stimulation pattern library to generate stimulation commands for intervention. This application achieves multi-electrode adaptation through the adapter plate and millisecond-level closed-loop response through high-speed processing, improving the timeliness and accuracy of intervention and enhancing safety.

This invention discloses a PtCo intermetallic compound based on microwave-assisted gas-phase dispersion. Using platinum, cobalt, and carbon sources, the PtCo intermetallic compound is uniformly dispersed on carbon materials via microwave-assisted gas-phase dispersion and deposition, followed by high-temperature treatment. The PtCo intermetallic compound consists of nanoparticles with an average particle size of 2.96 ± 0.34 mm and an L10 ordered core structure. The preparation method includes the following steps: 1. microwave treatment of the precursor; 2. high-temperature treatment of the precursor. When the PtCo intermetallic compound is used in the oxygen reduction reaction at the cathode of a proton exchange membrane fuel cell, the peak power density is 0.950–1.000 W / cm². ‑2 .