Chemical Oxygen Demand (COD) serves as a crucial metric for assessing the extent of water pollution attributable to organic substances. This study introduces an innovative approach detection low-concentration COD in aqueous environments through application Laser-Induced Fluorescence (LIF) image processing. The technique employs sensor capture fluorescence data generated by compounds when excited ultraviolet laser radiation. Subsequently, value, indicative concentration matter water, is...

Laser-induced fluorescence lidar (LIF-LiDAR) is an effective technology for the stand-off detection, identification, and quantification of oil spills on water surface. In this work, by using a self-developed LIF-LiDAR system, laser-induced spectra different oils with thicknesses surface were remotely measured at distance 100 m. The traditional algorithms based similarity degree matching are adopted to identify types, which results in 65% (min = 33.68%) 85% (max 98.66%) average accuracy when...

In this paper, we proposed a novel method to determine the oil film thickness on water with wide range, which is based intensity ratio between laser-induced fluorescence and Raman scattering of without films. To verify feasibility method, presented portable detection system employs laser diode at 405 nm an intensified charged-coupled device (ICCD) detector. Using system, diesel films variable thicknesses were measured different distances. The was in range from 0.07 mm 36.62 average relative...

Abstract Circular RNA (circRNA) has been confirmed to be involved in regulating sepsis‐induced acute kidney injury (AKI). Our research aims explore circ‐ZNF644 role the development of AKI. Lipopolysaccharide (LPS) was used induce tubular epithelial cell (HK2) injury. ELISA assay performed measure concentrations inflammation factors. Cell functions were determined by counting kit 8 assay, EdU and flow cytometry. Protein expression evaluated Western blot analysis. Quantitative real‐time PCR...

Abstract Accurate segmentation of polyps in colonoscopic images is a key step computer-aided diagnosis colorectal cancer. Although the current algorithm has some achievements field polyp segmentation, there are still challenges. The size and shape area different, boundary with background not obvious. In order to solve above problems, we propose new multi-scale context information fusion network(MSCFF-Net). Specifically, network first uses pyramid transformer (PVTv2) as encoder, designs...

At present, most of the spectrometers used in food detection have some problems such as complex operation, large volume and high cost, which are not conducive to their popularization application. Therefore, we developed a small-scale Bluetooth fluorescence spectrometer can be for vegetable oil. The 405 nm semi-conductor laser integrated excite spectrum oil, data detected by is transmitted Android mobile phone wireless Bluetooth, received, displayed processed software App Inventor. also...

A portable laser induced fluorescence (LIF) lidar is designed and developed for oil pollution monitoring. 405nm violet light used as excitation source. dual Amici prism spectroscopic structure to split the signal in spectral range of 450-1000nm, an image intensifier combined with array CCD achieve high sensitivity detection. The system integrates control, data acquisition processing modules, which can realize real-time detection composition content pollutants. spectra seawater, diesel oil,...

Laser induced breakdown spectroscopy (LIBS) is a kind of laser ablation spectrum analysis technology, which has the advantages small sample damage, fast detection speed and simultaneous multiple elements. In this paper, LIBS system based on passive Q-switched designed, used to carry out marine heavy metal research. Aiming at two or more pulses that may generate in single pumping cycle, pulse control module designed paper analyze judge number pulses, obtain good experimental results. Using...

Oil droplets suspended in the seawater will seriously affect transmission characteristics of electromagnetic wave from ultraviolet and visible light to infrared. The scattering phase function can show laser polluted by oil. Water with oil emulsion has a significantly different that natural ocean water. accurate calculation lay foundation for propagation spill seawater, is great significance protection marine environment. This paper presents modeling dispersed based on Mie theory. Numerical...