Recently, the reporter learned from the China Institute of Food Science and Technology that this year's National Food Safety Promotion Week has launched a two-month "Food Safety Network Knowledge Contest". Interested users can participate in the "Appetite for Drug Contest" app, 10 Answer 5 questions, you can participate in grab red envelopes. At the same time as the competition is launched, the Food Society will also select food safety awareness errors with high error rates and organize experts to interpret them. At present, according to the conditions of the competition test, experts have identified 8 representative summer food safety misunderstandings and notable phenomena from the 8,784 responses. Bacterial food poisoning is prone to develop in summer and autumn In summer and autumn when the temperature is high, if you eat an overnight meal or a fresh seafood, you may experience nausea, vomiting, abdominal pain, diarrhea, fever, and shock. This is because the hot and humid weather is conducive to the breeding of bacteria. Once pathogenic bacteria contaminate food, they can rapidly multiply to a number that can cause disease. It must not be overlooked that these bacteria, which are invisible to the naked eye, are released. Even if the toxins are treated with high temperatures, they will not be destroyed and poisoning may occur after ingestion. Experts stressed that the most important issue in global food safety is foodborne diseases caused by pollution. According to statistics, in the 2014 food poisoning incident, the number of microbial (bacterial) food poisoning incidents and the largest number of poisoning incidents were respectively 42.5% and 67.7% of the total number of food poisoning incidents and total poisoning incidents. Ingestion of wild mushrooms can cause serious death Mushroom is a high-protein, nutrient-rich, low-fat, low-calorie food rich in various amino acids, minerals, vitamins, polysaccharides and other nutrients, not only has a unique flavor, but also has a strong antioxidant effect. Can improve the body's immune system, containing tyrosinase also lower blood pressure, lipid-lowering effect. Many people think that wild foods are more nutritious, but many wild mushrooms are highly toxic and must be eaten carefully. Weaving of snails can cause death In the spring and summer, it is the season for producing the snail, but it is a table killer. A snail can be fatal. This is because weaving snails contain a neurotoxin - tetrodotoxin. The toxin is heat-stabilized, boiled, salted, sun-dried, etc. It cannot destroy it. At present, there are no special detoxification drugs. Textured snails are commonly referred to as "sea snail", "sea snail", "wheat snail" or "white snail" and are mainly distributed in coastal areas such as Zhejiang, Fujian and Guangdong. It can cause dizziness, vomiting, numbness of the lips and fingers, and may even result in death. The original Ministry of Health issued an announcement in 2012 to make it clear that any food production and operation unit must not purchase, process, and sell woven snails. Pasteurized milk can not only see shelf life Pasteurized milk is milk that needs to be refrigerated after purchase. The sterilization temperature of this milk is generally 72°C～85°C, which can ensure that the number of pathogenic bacteria will be reduced to a level that will not cause harm to consumers. The nutrition and natural flavor of milk are well preserved, but pasteurization does not kill all the bacteria in the milk, so cryopreservation is required and its shelf life is also short. Lily can not cause poisoning July and August are the mature seasons of daylily. Its unique aroma and taste make it a popular food on the table. However, special attention should be paid to the fact that fresh day lily contains a substance called “colchicineâ€. Although it itself is non-toxic, it can be oxidized to “second colchicine†in the metabolic process after gastrointestinal absorption. This is a highly toxic substance that can cause nausea, vomiting, abdominal pain, diarrhea and other poisoning symptoms. Adults who ingest 0.1-0.2 mg of colchicine (equivalent to 50-100 g fresh lily) can cause poisoning. Colchicine is water-soluble, so fresh cauliflower should be boiled in boiling water, then thoroughly soaked in water, rinsed, and cooked again so that it can be eaten safely. Because colchicine can evaporate with the bound water at high temperature, prolonged drying can destroy colchicine, so it is safe to eat dry day lily. "Preservative-free" does not mean "more secure" "Long shelf life = preservatives", "preservatives more = unsafe", "natural = safe" similar formulas solidified in the hearts of many consumers, the average consumer of "preservative-free" "natural" The "zero-add" understanding is more secure, and businesses are also aiming for this, and there are more and more foods that are advertised on the market with "preservative free." Experts emphasized that, in fact, preservatives are mainly used to prevent food spoilage, which can make our food more secure. If there is no preservative in some foods, the shelf life of the food will be very short, and it will be more easily contaminated by pathogenic microorganisms. The toxic substances produced by metabolism of pathogenic microorganisms will pose a threat to human health. Bitter almond does not change "poison" Bitter almonds are completely different from the American almonds (almond kernels) that we normally eat. In the seed coat and germ parts of bitter almonds contain highly toxic substances—hydrocyanic acid. Ingestion can cause poisoning and death due to respiratory failure. . Chinese medicine believes that bitter almond has the effect of relieving cough and relieving asthma and lung defecating. Studies have found that bitter almonds contain a biologically active substance, amygdalin, which can enter the bloodstream to kill cancer cells and have no effect on healthy cells, thus improving the symptoms of advanced cancer patients and prolonging their survival. At the same time, it is rich in carotene, anti-oxidation, preventing free radicals from attacking cells, and has a certain anti-cancer effect. However, special attention should be paid to the fact that large amounts of bitter almonds must not be consumed, as this may lead to poisoning. Earth oil extraction has a lot of hidden dangers Squeezing is a traditional oil production process. It uses physical methods to extract oil from the oil, and the obtained grease also needs to undergo various subsequent processing and meets relevant national standards. It is a qualified edible oil product that can be sold. . Many people believe that the method of soil oil extraction in rural areas has no additives and no pollution, and is a greener, healthier and safer food. Experts pointed out that, in fact, the oil obtained through the “earth method†contains many other components, such as free fatty acids, phospholipids, and oil residues, as well as polycyclic aromatic hydrocarbons that may be introduced during planting, harvesting, drying, and storage. Aflatoxin and pesticide residues. Such oils, if not subjected to the refining process, are inherently unstable and easily oxidized and deteriorated, and polycyclic aromatic hydrocarbons, aflatoxins and pesticide residues are substances that are extremely harmful to human health. The press oil produced by the factory has a greater security risk.
We may have ever seen the PTZ Camera/ PTZ Camera Outdoor/ PTZ Webcam HD/ PTZ Camera Night Owl/ PTZ Network Camera/ Pan Tilt Zoom Outdoor Network Camera in our daily life, but can't recognize it or don't know its name. Today let me introduce the PTZ Camera for you. PTZ Camera refers to the camera with the PTZ, so what is the PTZ?
The classification of the PTZ
In conclusion, I hope that the introduction about the PTZ can help you better understand the PTZ Camera.
PTZ Camera, PTZ Camera Outdoor, PTZ Webcam HD, PTZ Camera Night Owl, PTZ Network Camera, Pan Tilt Zoom Outdoor Network Camera SHENZHEN SANAN TECHNOLOGY CO.,LTD , https://www.sanan-cctv.com
What is the PTZ?
PTZ, the abbreviation of Pan/ Tilt/ Zoom, is the supporting equipment for installing and fixing cameras. PTZ can be divided into two types: the Fixed PTZ and the Electric PTZ. The Fixed PTZ is suitable for the situations where the surveillance range is not large. After the camera is installed on the fixed pan/tilt, the horizontal and tilt angles of the camera can be adjusted. After reaching the best working posture, just lock the adjustment mechanism. Motorized PTZ is suitable for scanning and monitoring a large area, it can expand the surveillance range of the camera. The high-speed attitude of the electric pan/tilt is realized by two executive motors, and the motors receive signals from the controller to operate and position accurately. Under the action of the control signal, the camera on the PTZ can automatically scan the surveillance area, and can also track the surveillance object under the control of the staff on duty in the surveillance center.
According to the characteristics of the PTZ's rotation, the PTZ can be divided into the horizontal rotating PTZ that can only rotate left and right, and the all-round PTZ that can rotate not only left and right but also up and down. Generally speaking, the horizontal rotation angle is 0°~350°, and the vertical rotation angle is +90°. The horizontal rotation speed of the constant-speed PTZ is generally 3°~10°/s, and the vertical speed is about 4°/s. The horizontal rotation speed of the variable-speed PTZ is generally 0°~32°/s, and the vertical rotation speed is about 0°~16°/s. In some high-speed camera systems, the horizontal rotation speed of the PTZ is as high as 480°/s or more, and the vertical rotation speed is more than 120°/s.
In fact, the PTZ, composed of two AC/DC motors, is an installation platform, which can move horizontally and vertically. The PTZ applied to the monitoring system can be controlled the direction of rotation and movement remotely through the control system, which is different from the PTZ( just a tripod, which can only be adjusted by hand) in the photographic equipment.
In conclusion, I hope that the introduction about the PTZ can help you better understand the PTZ Camera.
