Recently, experts have developed a fast, accurate, nondestructive and convenient method to detect the freshness of pork by using optics. Based on the principle of biophotonics, this study designed a visible short-wave near-infrared multi-channel optical parameter detection device by using near-infrared steady-state spatial resolution spectroscopy technology and according to the relationship between the optical parameters of meat and the change of freshness. At the meeting between the China Association for Science and Technology Science and Technology Journal and the news media held on October 27th, 2111, relevant experts pointed out that the research results provided a guarantee for the food safety of consumers.
in recent years, with the exposure of several major malignant food safety incidents, the government and the public have paid more and more attention to food safety, and invested more and more in food safety testing related research. Meat consumption is an important part of people's "eating" problem. In order to prevent problematic meat from circulating in the market, we must rely on accurate, fast and portable quarantine inspection methods to monitor the market.
According to reports, the main components of meat are protein (including myofibrillar protein and sarcoplasmic protein), moisture, lipids, a small amount of extracts (nitrogen-containing and non-nitrogen-containing substances) and trace vitamins. In the process of meat freshness change, the absorption coefficient and scattering coefficient will change correspondingly due to the changes of the content of the main components of meat and the structure of meat. The changes of meat quality can be reflected by measuring the changes of the two or directly expressing the parameters of the changes.
Wen Xing of China Academy of Agricultural Sciences and other experts published a special article in the Journal of Agricultural Engineering in the 9th issue in 2111, pointing out that the researchers of the research group used the steady-state spatial resolution spectroscopy technology to form a detection system composed of multi-channel short-wave near-infrared spectroscopy instruments to obtain optical parameters, thus obtaining a more effective method to study the optical nondestructive detection of pork freshness. This method can be used to measure the meat quality information with a certain detection depth, which makes the results more accurate and reliable. The researchers measured the optical parameters of meat with a testing device (principle prototype), and through a large number of experiments, it was proved that volatile basic nitrogen (TVB-N, mainly mixed amine) would be produced in the process of meat spoilage, and the structure of meat would change significantly. The correlation between near infrared spectrum and TVB-N could be established in the short-wave near infrared range, so as to achieve the purpose of evaluating the freshness of meat. This study provides theoretical basis and design basis for designing a short-wave near-infrared nondestructive freshness detection system with discrete wavelengths. It is also introduced that this project, as one of the national "863 plans", has applied for a national invention patent at present, and it is planned to be popularized and applied within two years.
This is the research result of the paper "Detection Method of Pork Freshness Based on Steady Spatial Resolution Spectrum" which was recommended at the meeting between scientific journals and news media in this issue. Other three achievements recommended mainly include Integrated Research on New Tower Solar Thermal Power Generation System, Rapid Detection of Adulterated Milk by Low-field Nuclear Magnetic Resonance Combined with Principal Component Analysis, and On Professor Li Siguang's Quaternary Glacier in Lushan Mountain Misreading Debris Flow. The four research results recommended in writing are: Experimental Study on Spray Disinfection of Chicken with Neutral Electrolytic Water in Egg Breeding Chicken Farm, Selection of Key Indicators for Evaluation of Rural Infrastructure Investment Benefit, Research on Production Line and Equipment of Biomass Solid Molding Fuel Processing, SIMVASTATIN INHIBITED Cardiology and Fibrosis in Apo Lipoprotein e-defficiency mice fed a "western-style diet" by incremental. g PPAR alpha and gamma expression and reducing TC, MMP-9, and Cat S levels》。
The meeting between China Association for Science and Technology's sci-tech periodicals and news media was hosted by the Academic Department of China Association for Science and Technology, and jointly hosted by Science and Technology Herald and China Association for Editors of Sci-tech Periodicals.