5results about How to "Fix instability" patented technology

The application relates to an antibacterial and antifouling reverse osmosis membrane and a preparation method thereof, and comprises the following steps: (1) uniformly dissolving a multiacyl chloride group organic compound in an organic solvent, then adding cyclodextrin, and carrying out ultrasonic treatment to obtain a cyclodextrin-organic acyl chloride inclusion compound solution; dispersing antibacterial nanoparticles in water, then adding an amino silane coupling agent, and stirring and dispersing to obtain a functionalized antibacterial nanoparticle suspension with amino groups on the surface; (2) uniformly coating the cyclodextrin-organic acyl chloride inclusion compound solution to one surface of a prefabricated reverse osmosis membrane, removing the excess solution on the surface after standing, and then coating the functionalized antibacterial nanoparticle suspension with amino groups on the surface on the surface with the cyclodextrin-organic acyl chloride inclusion compound, removing the excess solution on the surface after standing, and carrying out thermal drying to obtain the antibacterial and antifouling reverse osmosis membrane. The reverse osmosis membrane has excellent stability, small membrane sheet water flux attenuation, obviously improved antifouling capacity, and excellent antibacterial capacity.

This invention relates to the fields of cosmetics and pharmaceutical chemistry, and discloses a glycyrrhizin salicylate ester and its applications. The structural formula of the glycyrrhizin salicylate ester is shown in Formula I. The glycyrrhizin salicylate ester of this application uses glycyrrhizin and salicylic acid as starting materials, and combines the two active molecules into one through dehydration ester condensation, fundamentally solving the problem of easy oxidation and inactivation of glycyrrhizin, and significantly improving chemical stability. At the same time, this structure cleverly masks the strongly acidic carboxyl group of salicylic acid, resulting in a significant reduction in skin irritation of the final product, making it far milder than physical mixtures, with better tolerance and suitability for a wider range of skin types. The glycyrrhizin salicylate ester of this application combines the excellent whitening and antioxidant effects of glycyrrhizin with the excellent keratin-regulating and anti-inflammatory capabilities of salicylic acid, and has broad application prospects in the preparation of topical products for skin whitening, spot fading, anti-inflammation, anti-acne, and anti-photoaging.

This utility model discloses an automatic sampling device for belt conveyors, including a concrete foundation installed directly in front of a funnel, and a head roller mounted on a head frame. A rotary gearbox is installed on the front wall of the funnel, and a sampler is installed on the rotary gearbox. The rear of the sampler is connected to a hydraulic cylinder. A receiving hopper is located directly below the sampling spoon of the sampler, and a sample bag is provided at the outlet of the receiving hopper. A rotating receiving device is located on one side of the receiving hopper, and the rotating receiving device is driven to rotate by a receiving stepper motor. This utility model also includes a programmable PLC controller, sensors, and an HMI (human-machine interface), which can control and monitor the operating status of the sampling device in real time, including motor operating parameters, sensor working status, and perform fault alarms and recording. This utility model adopts an automated standard timed sampling method, eliminating the safety hazards of manual sampling, improving the authenticity and stability of sampling, and ensuring safe and convenient operation.

The application relates to the technical field of ultrasonic flaw detection, in particular to an ultrasonic flaw detection method and system based on pulse reflection, which has the technical scheme as follows: S1, collecting real-time vibration information and temperature information of a measured body; S2, constructing a propagation disturbance representation model based on the information in S1; S3, generating a compensation excitation pulse; S4, emitting the compensation excitation pulse; S5, collecting echo signals and obtaining residual signals through matched filtering and cross-correlation processing, and updating phase correction amounts and amplitude coefficients based on the signals and reference echoes to realize closed-loop compensation; the application collects vibration, temperature and geometric data through multiple sensors, constructs a propagation disturbance model and dynamically calculates phase correction amounts and amplitude weighting coefficients, compensates for environmental influences, generates a compensation pulse, emits and processes echo signals using an array transducer, realizes high-precision defect detection, adopts a closed-loop control mechanism, automatically adjusts flaw detection parameters based on residual estimation and feedback, and ensures stability.