"Six" Keys of China's Food Safety Science and Technology Development Strategy

As food safety incidents occur from time to time, supervision and management have become the focus of work for countries and international organizations around the world. In terms of detection technology, the limit value of food safety and sanitation control indicators gradually decreased, and foodborne hazards key detection technologies tend to be high-tech, serialized (multi-residue), rapid measurement, and portability. For example, the U.S. Food and Drug Administration (FDA) multi-residue method can detect more than 360 pesticide residues; food source disease and food contamination monitoring, traceability and early warning technologies have become an important guarantee for food safety; food-borne hazards Exposure assessments and health effects assessments have become an important means of ensuring food safety; risk assessment techniques have been incorporated into the World Health Organization (WHO) and the Food and Agriculture Organization of the United Nations (FAO), the World Trade Organization (WTO) and the Codex Alimentarius Commission (CAC). In many documents, it has also become an important basis for formulating food safety standards and arbitrating trade disputes; food safety control technology has become a model to be followed by all countries, and all countries are striving to implement "Hazard Analysis and Critical Control Points (HACCP)"; food safety Standards have become technical support and important guarantees for food safety control measures and have become a strategic focus in international trade. Combining international food safety science and technology development experience, China's food safety science and technology development strategy should focus on the following aspects: 1. Further development of food-borne hazard risk assessment technical reference WHO, FAO Basic principles on risk assessment Establish suitable The evaluation model and method of China's national conditions; the risk factors related to foodborne diseases as the focus of analysis; in the process of carrying out risk assessment, focus on population exposure and health effects assessment; should pay attention to risk assessment for susceptible population; The timely update of risk assessment provides a scientific basis for formulating limit standards. Second, the development of more reliable, fast, portable, accurate food safety testing technology on the basis of the existing, to further establish a number of technically international standards, scientifically certified key research and testing agencies for food safety testing technology Provide technical support with key methods. According to China's national conditions, rapid detection technology should be developed in the near future. At the same time, we have selectively researched and developed some high, precise, and sharp detection methods, developed some advanced equipment, and accelerated the development of consumables required for testing. Improve the quality control standards for food safety testing laboratories, and further establish and improve residue detection techniques. Including: pesticides, veterinary drug residue detection technology, trace and ultra trace detection technology of important organic pollutants, food additives and banned chemicals inspection technology, food important pathogen detection technology. III. Further development of food safety process control technologies The development of major residue control technologies for foods in foods mainly includes: pesticide residue control technologies and veterinary drug residue control technologies; development of feed safety quality control technologies; development of food production, processing, storage, packaging and transportation Process security control technology. Fourth, improve the domestic food safety standards system that is integrated with the international standards and gradually separate the food safety or hygiene standards from the food quality standards and turn them into "horizontal" standards that pay more attention to food safety. V. Improve the monitoring network system Further improve the food contamination, foodborne disease surveillance network and foodborne disease reporting system. Strengthen special monitoring activities, especially the monitoring and early warning of sudden public food safety accidents. Terrorist activities using chemical pollutants and biological pollutants are closely monitored. Improve the animal and plant quarantine and epidemic prevention system, improve the import and export food safety monitoring system, integrate the strengths of the monitoring network system, and coordinate the monitoring of network repetitive construction and mutual fragmentation among departments and between import and export systems. VI. Continuing to develop and expand comprehensive demonstrations of the application of key technologies for food safety, establish an effective and feasible demonstration model for food safety science and technology demonstration models that suit China's national conditions, and strengthen communication between demonstration areas, demonstration areas, and common technology projects. , To achieve the docking of common technology and demonstration areas, and establish a scientific and technological innovation platform in the demonstration area.

Pneumatic cylinders (sometimes known as air cylinders) are mechanical devices which use the power of compressed gas to produce a force in a reciprocating linear motion.

Like hydraulic cylinders, something forces a piston to move in the desired direction. The piston is a disc or cylinder, and the piston rod transfers the force it develops to the object to be moved. Engineers sometimes prefer to use pneumatics because they are quieter, cleaner, and do not require large amounts of space for fluid storage.

Because the operating fluid is a gas, leakage from a Pneumatic Cylinder will not drip out and contaminate the surroundings, making pneumatics more desirable where cleanliness is a requirement. For example, in the mechanical puppets of the Disney Tiki Room, pneumatics are used to prevent fluid from dripping onto people below the puppets.

Once actuated, compressed air enters into the tube at one end of the piston and, hence, imparts force on the piston. Consequently, the piston becomes displaced (moved) by the compressed air expanding in an attempt to reach atmospheric pressure.

Although pneumatic cylinders will vary in appearance, size and function, they generally fall into one of the specific categories shown below. However there are also numerous other types of pneumatic cylinder available, many of which are designed to fulfill specific and specialized functions.

Pneumatic Cylinder

Single Acting Cylinders, Telescoping Cylinder, Double Acting Cylinders, Telescoping Pneumatic Cylinder

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