8results about How to "Good quantitative effect" patented technology

The invention relates to the field of chemical analysis, and discloses a method for quantitatively detecting 3-indole-acetic acid and 3-indole-formaldehyde in plant root exudates, which comprises the following steps: (1) preparing a series of mixed standard mother liquor of 3-indole-acetic acid and 3-indole-formaldehyde with concentration gradient; (2) drawing a standard curve; (3) preparing a root exudate extracting solution; (4) detecting the root exudate extracting solution in the step (3) by adopting a method which is the same as that in the step (2); and (5) comparing the detection result in the step (4) with the standard sample in the step (2), and determining the content of 3-indole-acetic acid and 3-indole-formaldehyde in the root exudates. The method disclosed by the invention has the advantages of simplicity in operation, high detection speed, short time consumption, small amount of required samples, large linear range of determination, good repeatability and good quantitative effect, can be suitable for samples with large concentration fluctuation range, and is particularly suitable for quantitative detection of root exudates.

The invention belongs to the technical field of drug detection, and particularly relates to a method for detecting lycium barbarum glycopeptide metabolites in rat plasma and tissues based on non-targeted metabonomics. According to the method, after rat lycium barbarum glycopeptides are administered through intragastric administration, blood, liver, intestine, lung and brain tissue samples after administration are collected. A UPLC-Q-TOF-MS (Ultra Performance Liquid Chromatography-Quadrupole Time of Flight Mass Spectrometry) analysis method is combined with a statistical analysis method comprising principal component analysis (PCA) and orthogonal-partial least squares discriminant analysis (OPLS-DA) to carry out in-vivo metabonomics analysis on the wolfberry glycopeptide. Then, based on a human metabolome database (HMDB), lycium barbarum glycopeptide differential metabolite is searched, so that the pharmacological action mechanism of the lycium barbarum glycopeptide is clarified from the perspective of metabolism, and a foundation is laid for deep research and development of the medicinal value of the lycium barbarum glycopeptide in future.

This invention discloses a method for fabricating and applying a formaldehyde SERS sensor based on an Au@ZIF-8 core-shell nanostructure, belonging to the field of gas detection technology. Formaldehyde has an extremely small intrinsic Raman cross section, and ordinary SERS substrates lack the ability to capture it, resulting in weak detection signals at low concentrations. This sensor uses Au@ZIF-8 core-shell nanoparticles to assemble a two-layer thin film as the SERS substrate. The Au nanoparticles (AuNPs) serve as the electromagnetic enhancement core, while the ZIF-8 shell layer enriches and sieves formaldehyde molecules. A layer-to-layer deposition method is used to construct the double-layer thin film structure to obtain optimal SERS performance. This invention solves the problems of low sensitivity, poor specificity, insufficient stability, and difficulty in rapid on-site detection in existing formaldehyde detection technologies. The detection limit is as low as 0.16 ppt, and within a wide range from 0.01 ppb to 100 ppm, the characteristic peak intensity exhibits an excellent linear relationship with the logarithm of formaldehyde concentration (R² ≥ 0.995). It can specifically identify formaldehyde and exclude interference from other VOCs, making it suitable for rapid quantitative detection of formaldehyde in practical scenarios such as indoor environments and cigarette smoke.

This invention discloses a multi-scale feature fusion method and system for atmospheric turbulence video correction. It extracts shallow texture, mid-level structure, and high-level semantic information through a multi-scale feature pyramid, and combines frequency adaptive enhancement and deformable attention alignment mechanisms to perform channel-weighted processing on different frequency components. Adaptive optimization is achieved to address differences in turbulence sensitivity, and feature-level alignment is completed under optical flow guidance to eliminate tilt distortion. Simultaneously, a gated reference update module dynamically maintains reference features to suppress turbulence noise accumulation. Furthermore, a multi-head temporal channel self-attention mechanism is used to achieve cross-frame spatiotemporal fusion, improving temporal consistency, and a two-stage decoder is used to progressively restore image geometry and high-frequency details. This invention can significantly improve the clarity of turbulence-degraded images, providing technical support for high-precision imaging.

The invention relates to the technical field of pinacolone production, in particular to a quantitative control device for pinacolone production, which comprises a processing cylinder, a feeding pipe is arranged on the top surface of the processing cylinder, a feeding disc is arranged on the top surface of the feeding pipe, a mixing cylinder is arranged on the top surface of the feeding disc, a feeding frame is mounted in the mixing cylinder, and a feeding hopper is mounted in the mixing cylinder. A first quantitative feeding frame is fixedly connected to the top surface of the feeding frame, and a top plate is arranged on the top surface of the first quantitative feeding frame; and a display screen body. A movable plate is extruded, a feeding groove is opened at the moment, so that materials integrally fall into the feeding groove, then the materials fall into a mixing barrel through a feeding frame, the pushing effect after the materials are integrally weighed is relatively complete, the materials can be integrally conveyed, and the material conveying efficiency is improved. According to the weighing platform, the materials are prevented from remaining on the surface of the weighing platform body, and the materials needing to be put can be put in a quantitative control mode.

The utility model relates to the technical field of glue injectors, and provides a quantitative glue injection mechanism which comprises a fixing plate, a glue tank and a pair of fixing rods, the glue tank is fixed on the bottom surface of the fixing plate, the fixing rods are respectively fixed at two opposite ends of the bottom surface of the fixing plate, glue pipes are fixed at the lower ends of the fixing rods, and quantitative extrusion components are arranged on the fixing plate and the glue pipes. The quantitative extrusion assembly comprises a pair of telescopic air cylinders fixed to the two opposite ends of the surface of the fixing plate, round holes are formed in the tops of the rubber pipes, the output ends of the telescopic air cylinders are connected with sleeves, and a plurality of long holes are formed in the outer surfaces of the sleeves. By means of the technical scheme, the problems that in the prior art, glue injection into a glue injector is mostly completed through manual operation, a worker aligns a glue outlet pipe to an outlet of the glue injector and injects glue into the glue injector, the mode is low in efficiency, the glue injection amount depends on experience of the worker, errors are large, and the glue injection efficiency is poor are solved. And some existing equipment adopts an air pressure mode to extrude and discharge glue, so that the glue discharge amount cannot be accurately controlled.

The invention provides a mass spectrometry device and method based on multiple modes. The mass spectrometry device comprises an ion source, a detector and a power supply, the multi-stage transmission unit is arranged between the ion source and the detector; the transmission unit comprises an ion lens and a multi-pole rod; the input end of the control unit is connected with the power supply, the output end of the control unit is connected with the multi-pole rod and the ion lens, and the control unit is used for adjusting the voltage of the multi-pole rod and the ion lens, so that the transmission unit is selectively in an ion transmission mode, an ion filtering mode and an ion storage mode. The invention has the advantages of high sensitivity, simple structure and the like.

The invention discloses a conventional triaxial stress state teratology-physical energy ratio rockburst criterion method which is suitable for meeting # imgabs0 # in the actual stress state of a rock. The method comprises the following steps: step 1, determining the variable energy density Ws, c of a rock critical failure body under the condition that the confining pressure is equal to the conversion pressure; step 2, rock burst primary criterion; step 3, obtaining a result in Wslt; when Ws, c, under the confining pressure sigma3 borne by the rock, the critical brittle failure stress state energy ratio coefficient of the rock is lambda '; 4, solving an energy ratio coefficient lambda of the rock in an actual stress state when delta sigma does not reach a brittle fracture failure critical value; and step 5, re-judging rock burst. The rockburst released energy obtained by the method is used for judging whether the surrounding rock is a rockburst occurrence region or not, support is provided for tunnel rockburst prevention and control design, and the engineering construction safety is improved.