Fluorescence probe technology refers to a technical means of labeling the substance to be measured with fluorescence probe, enabling qualitative and quantitative analysis of the measured substance. Fluoride ion is one of the important trace elements in human body, proper intake of fluoride ion can help prevent tooth decay and osteoporosis, while excessive intake of fluoride ion can cause a variety of diseases. Therefore, it is of great significance to develop fluorescence probes that can detect fluoride ions in organisms. The latest scientific research results were converted into comprehensive designing experiment "the synthesis of fluorescence probe and detection of fluorine ions in aqueous phase". Through the implementation of the experiment, the students' ability of organic synthesis, the operation of optical analytical instruments and the analysis of experimental data will be greatly improved.

Objective Therefore, the purpose of this study is to verify and optimize the microbial contamination control strategies during the production of sterile injections to ensure product safety and improve production quality. Methods A randomized trial design was conducted between January 2022 and December 2023, a traditional control strategy between January 2022 and December 2022, and a post-optimized strategy between January 2023 and December 2023. By comparing the microbial pollution under different strategies, combining with the production environment monitoring, process process analysis and operator behavior code assessment, the effectiveness of the control strategy is comprehensively evaluated, and the strategy is optimized. Results The study found that the optimized strategy greatly reduced the risk of microbial contamination and improved production efficiency and product quality. Conclusion The validation and optimized microbial contamination control strategy has significant results in the production of sterile injection, which provides a strong guarantee to ensure the sterility and safety of the injection products. In the future, the production process will be continuously monitored, and the control strategy will be dynamically adjusted according to the actual situation to meet the changing production environment and regulatory requirements.

Objective To understand the soil status of rural soil health in Fushun City from 2017 to 2020, and to provide specific data for formulating related policies and assessing soil risks. Methods The specific data of rural soil health in Fushun city from 2017 to 2020 were monitored and analyzed. 20 monitoring sites were randomly selected for soil monitoring, and the content of parasites, heavy metals and other related indexes in soil were determined. Results Lead content reached ${645}\mathrm{{mg}}/\mathrm{{kg}}$ in Dawang village in 2020; Zhongtong village reached ${2035}\mathrm{{mg}}/\mathrm{{kg}}$, cadmium content reached ${1.22}\mathrm{{mg}}/\mathrm{{kg}}$, and other indicators were not exceeded. Conclusion The results showed that the rural soil health status of Fushun city from 2017 to 2020 was generally good, but some areas in some years also exceeded the standard, and continued to strengthen monitoring to prevent problems.

To explore the limitations of the low air pressure test methods for electronic and electrical products, and to propose ways to optimize and improve the test methods. To analyze the influence of low air pressure environment on the performance, reliability and life of electronic products, and to summarize the important role of low air pressure test in the reliability assessment of electronic products. From the four aspects of test equipment, test conditions, test point arrangement and data processing methods, suggestions are made to improve the low air pressure test methods. For the test equipment, it is proposed to adopt new vacuum pumps, high vacuum chamber materials, optimize the sealing structure, and introduce precise temperature control algorithms; for the test conditions, it is proposed to reasonably select the air pressure value and rate of change according to the product environment, match the temperature conditions, and take into account the test efficiency and failure incentives; for the test point layout, it is proposed to focus on the key devices and weak structures, and adopt suitable wiring materials and direction design; for the data processing method, it is proposed to improve the low air pressure test method. For the data processing method, it is suggested to introduce new methods such as machine learning and signal processing to explore the failure law and performance trend, and focus on the visualization of the analysis results. Strengthening the research on low air pressure test methods is of great significance to enhance the reliability of electronic products and promote their application in rail transportation, aerospace and other fields, which requires the joint efforts of industry, academia and research institutes.

College electrical and electronic laboratories play a crucial role in conducting fundamental and advanced education and teaching activities. In order to improve the overall safety of electrical and electronic laboratories in colleges and universities, eliminate safety hazards and prevent safety accidents. This paper analyzes and summarizes the common unsafe factors in electrical and electronic laboratories in colleges and universities. These unsafe factors include physical unsafe factors and human unsafe factors. Physical related unsafe factors involve experimental equipment and experimental environment, while human related unsafe factors involve laboratory managers, experimental instructors and students. Based on an analysis of these unsafe factors, this paper puts forward specific measures for electrical and electronic laboratory safety management, including strengthening the safety management of experimental equipment and experimental environment, improving the safety management level of laboratory staff, enhancing the awareness of safety responsibility of experimental instructors, and eliminating unsafe behavior of students. These measures provide a certain security guarantee for the construction and development of electrical and electronic laboratories.

This study will start with the current problems in the safety and management of multi campus university laboratories, and explore new methods and approaches for intelligent management and security system design of laboratories based on the perspective of the Internet of Things. We will use Internet information technology to build a resource sharing, fully open and efficient experimental teaching platform, build a laboratory management system based on the big data era, monitor the whole process before, during and after the experiment through the collection and analysis of data generated by the use and operation of various instruments and equipment, find problems in the experiment in time, carry out targeted guidance, effectively warn laboratory hazards, improve laboratory safety management efficiency, push laboratory management to a higher level, and achieve the win-win effect of talent training, scientific innovation, and safety management.

Objective At present, the systematic study of heavy metals releasing law from ceramic disc sealed water faucet is lack in domestic. At the same time, nozzle production enterprises also lack relevant knowledge, so it is necessary to study this to provide a scientific basis for the green and sustainable development of the nozzle industry. Methods Through the laboratory simulation method, the inductively coupled plasma mass spectrometer was used to analyze and test the precipitation of heavy metal pollutants in the nozzle, and systematically studied the precipitation law of heavy metal pollutants in the ceramic sheet sealed nozzle. Results Through testing and analysis, the material of the surface nozzle material also determines the precipitation type of heavy metal pollutants. The immersion time and the concentration of inorganic salt in water quality are directly proportional to the precipitation of heavy metals. The lead brass nozzle effectively reduces the precipitation of lead and chromium heavy metals through the lead removal process; the precipitation of lead is reduced by 81% to 86%, and the precipitation of chromium is reduced by 52% to 56%. Conclusion Enterprises can choose suitable materials and processes to produce nozzles according to their own conditions. Consumers should avoid exposure to excessive heavy metals according to their use.

The current national standard employs the phenol-sulfuric acid method for quantifying the curdlan content. However, due to inadequate dispersion of some curdlan particles in the solvent caused by agglomeration during dissolution in a 0.1mol/L sodium hydroxide solution, the results of content detection were found to be unstable. The samples were treated by magnetic stirring, homogenizer dispersion and ethanol dispersion. It was found that: The ethanol effectively disperses the curdlan sample in the sodium hydroxide solution, preventing it from agglomerating. The ethanol method effectively and efficiently addresses the pain point in determining the content of curdlan, offering valuable insights for enhancing the detection methodology.

This study aims to explore the specific application of non-destructive testing technology in quality control of pouring molds, in order to improve the accuracy and reliability of mold manufacturing. Mainly using ultrasonic testing technology to detect mold materials, in order to accurately identify defect locations and evaluate material stress distribution. At the same time, infrared thermal imaging technology is used to monitor the temperature distribution and processing parameters of the mold surface, in order to evaluate the surface quality. The research results indicate that non-destructive testing technology has significant advantages in quality control of pouring molds and can effectively improve the level of quality control. I hope that through the research in this article, we can effectively improve the technological level of the mold manufacturing industry and promote its development.

Objective To improve temperature check technology for resistance to thermal shock of ceramic cookware products and to enhance the work efficiency. Methods By using different temperature testing tools of infrared thermometer and compact spot finder infrared camera to test resistance to thermal shock of samples, and the experimental steps and results were compared and analyzed. Results For infrared thermometer, manual handheld operation is required to detect the bottom temperature of a sample, which has low safety and poor detection repeatability; For the compact spot finder infrared camera, it can be connected to a computer for automation to detect temperature of sample, which can achieve the temperature visualization, easy to operate, more safety and reliable. Conclusion The experimental data shows that the compact spot finder infrared camera provides safe and reliable technical support for the detection of resistance to thermal shock of ceramic cookware. This experiment provides technical guidance for improving the quality of ceramic cookware products.