9 results about "Uv spectrum" patented technology

This invention proposes a sunscreen composition, its preparation method, and its application in cosmetics, belonging to the fields of medical, dental, or cosmetic formulations. The sunscreen composition contains components of boron nitride-titanium dioxide-encapsulated silica and plant extracts; the plant extracts are loaded onto the boron nitride-titanium dioxide-encapsulated silica; the plant extracts are a combination of Aspergillus niger fermented Sophora japonica flower extract and Scutellaria baicalensis extract. This invention achieves highly efficient sun protection through a multi-mechanism synergy: the porous silica-titanium dioxide core-shell structure provides physical scattering, boron nitride doping enhances reflection, and the loading of the Aspergillus niger fermented Sophora japonica flower and Scutellaria baicalensis extract achieves chemical absorption and antioxidant protection through a synergistic effect, resulting in highly efficient protection against the entire UV spectrum. This system avoids the use of chemical sunscreens, is highly safe, and has a pleasant skin feel.

This invention discloses a combustion environment aerodynamic parameter measurement system and method based on the strong absorption advantage of ultraviolet (UV) spectroscopy, belonging to the field of combustion diagnostic technology. The measurement system includes: a fiber-optic coupled in-situ measurement unit for fiber-optic coupling of a UV beam emitted from a UV light source to obtain fiber-optic coupled absorption spectral signals of various small-area points; a UV absorption measurement and control analysis unit for obtaining the first UV absorption spectrum of each small-area point; a simulation unit for obtaining the second UV absorption spectrum of each small-area point; a training unit for training a neural network using the second UV absorption spectrum; and a calculation unit for calculating combustion environment aerodynamic parameters using the first UV absorption spectrum and the trained neural network. This invention can improve the accuracy of short-path probe measurements of combustion environment aerodynamic parameters.

This invention relates to the field of atmospheric trace gas detection technology, specifically disclosing an ultra-high sensitivity online detection system and method for atmospheric BrO radicals. The ultra-high sensitivity online detection system for atmospheric BrO radicals includes an optical cavity, a 340 nm ultraviolet light source, an ultraviolet optical fiber, an ultraviolet spectrometer, and a sampling unit. The optical cavity has an inlet and an outlet, and contains an ultraviolet optical resonance region. Ultraviolet light emitted from the ultraviolet light source is reflected multiple times in the ultraviolet optical resonance region and then transmitted into the ultraviolet optical fiber. The ultraviolet optical fiber is used to superimpose all transmitted light in the ultraviolet band and transmit it to the ultraviolet spectrometer. The sampling unit is used to directly input the gas to be measured into the optical cavity, or to selectively remove BrO radicals from the gas to be measured before inputting it into the optical cavity. This invention achieves ultra-high sensitivity online point detection of BrO radicals in the atmosphere. Compared with existing technologies at home and abroad, its BrO detection limit is better than 1 pptv, reaching the sub-pptV level, demonstrating excellent detection performance.

The application provides a spectrum detection device and method based on ultraviolet-fluorescence feature level fusion, and belongs to the field of spectrum detection and analysis. The device comprises an ultraviolet light source module, a sample detection module, a fluorescence collection module, a spectrum analysis module and a data processing module. The ultraviolet light source module is used for providing stable ultraviolet excitation light; the sample detection module is used for irradiating the ultraviolet light onto a sample to be detected and collecting the excited fluorescence signal; the fluorescence collection module captures the fluorescence signal through a high-sensitivity detector; the spectrum analysis module performs spectrum separation on the collected ultraviolet light and fluorescence signal; and the data processing module adopts a feature level fusion algorithm to perform fusion analysis on the features of the ultraviolet spectrum and the fluorescence spectrum, so as to improve the detection precision. The application can simultaneously utilize the advantages of the ultraviolet spectrum and the fluorescence spectrum, comprehensively detects the physical and chemical characteristics of a sample, and is widely applicable to the fields of food safety detection, biological medicine analysis, environmental monitoring and the like.

This invention relates to the field of polymer materials technology, and discloses a high weather-resistant, low-gloss rigid polyvinyl chloride film, its preparation method, and its application. The film comprises, by weight, 100 parts of polyvinyl chloride resin, 10 parts of matte polyvinyl chloride resin, 1-2.5 parts of stabilizer, 1-5 parts of processing aid, 5-10 parts of polymer modifier, 0.2-1 part of internal lubricant, 0.2-0.7 parts of external lubricant, 0.2-0.7 parts of antioxidant, 0.8-3 parts of UV absorber A, 0.8-3 parts of UV absorber B, and 0.4-1.2 parts of UV absorber C. This invention is completely free of plasticizers and complies with RoHS, REACH and other environmental standards. Three UV absorbers synergistically cover the entire 250-405nm UV spectrum, significantly improving weather resistance. Utilizing planetary screw extrusion, two-roll open milling, and five-roll calendering processes, the film, after 300 hours of UV aging, exhibits a color difference value ΔE ≤ 0.15 and an outdoor service life of 15-20 years. This invention solves the problems of easy plasticizer migration and insufficient weather resistance in traditional low-gloss PVC films, making it suitable for home decoration materials or packaging materials.

An antimicrobial device, such as a flashlight, lantern, or lamp, is discussed herein. The antimicrobial device produces light in the ultraviolet (UV) spectrum (i.e., 150-250 nm), including 200-230 nm. The antimicrobial device includes an electron source, an extractor, and a target material. The electron source provides the electrons of sufficient energy to cause a photon to be released, whether by a target or by the electron itself. The extractor extracts the electrons from the electron source. The target material is a component at which the electron is directed. The target material can release a photon having a desired wavelength or within a desired wavelength range or cause the electron to release a photon having a desired wavelength or within a desired wavelength range. 133241.1004 PATENT 12 20 26 20 53 81 07 J ul 2 02 6 1 3 3 2 4 1 . 1 0 0 4 P A T E N T 2 0 2 6 2 0 5 3 8 1 0 7 J u l 2 0 2 6 1 2

A UV-based imaging method for determining protein concentrations in unknown protein samples based on automated multi-wavelength calibration is disclosed. In various embodiments, a processor receives each of a set of standard wavelength data, such as data recorded by a detector, and a set of unknown wavelength data. Each of the set of standard wavelength data and the set of unknown wavelength data defines a series of absorbance-wavelength value pairs across a first wavelength range selected from a series of single-wavelength beams from the UV spectrum. The processor generates a multi-wavelength calibration model based on each of the first series of first absorbance-wavelength value pairs from the set of standard wavelength data. The processor implements the multi-wavelength calibration model to determine multiple protein concentration values ​​for each unknown protein sample in a given unknown protein sample.

The application discloses a method for recognizing and detecting methanol in an ethanol solution. The method utilizes the transesterification reaction between methanol in a mixed solution and a reactive ester under the promotion of an amine to generate a p-nitrophenol negative ion with ultraviolet absorption. The ultraviolet intensity is detected by using an ultraviolet spectrometer, so that the methanol content can be measured. The method fully utilizes the principle of the transesterification reaction, a catalyst diethylamine, the generation of a p-nitrophenol negative ion (4-NP), the generation of ultraviolet absorption, the detection of the ultraviolet intensity by using the ultraviolet spectrometer, and the purpose of simply, sensitively and specifically detecting the methanol.