What can babies and babies not eat honey? Which oil is best for frying? Are you confused about the food safety issues that are common in these lives? From March to May this year, more than 10,000 members of the public participating in the food safety quiz contest handed in the answer sheet, and the top ten issues listed in China and Romania were freshly disclosed. It was the “ten blind spots†in the hearts of the people regarding food safety knowledge. , hurry to see if you will answer. At present, the winners of the various awards have already decided that the “Food and Life†magazine will contact each other to confirm the identity information. After confirmation, the prize will be sent by express delivery. The complete list of winners can be found on the Shanghai Food Safety Network and telephone numbers. Error rate first place: Babies under 1 year of age cannot eat honey mainly because of (B). A. Honey contains hormones, can cause precocious puberty B. Honey may contain botulinum bacillus C. Sugar content is too high, affect the development of D. Above are Analysis: Infants under the age of one should not eat honey, mainly because honey is susceptible to botulism during brewing, transportation and storage. Because the baby is weak in resistance, after eating Botox, it will breed in the intestine and produce toxins, and the detoxification function of the baby's liver is poor, so it is easy to cause botulism food poisoning. Error rate second place: Regarding food safety, the following statement is wrong (ACD). A. Food safety must be zero risk B. Foods containing preservatives are not necessarily unsafe foods C. Natural foods must be safe D. Foods containing carcinogenic substances will result in cancer analysis: Can only say that the risk of food safety is reduced , food safety is impossible to achieve 0 risk, 100% safety; as long as the food according to national standards to add preservatives is a safe food; natural foods such as puffer fish, some organs and tissues contain toxins, the potato sprouted after the dragon The content of kwaiine is soaring that it can cause poisoning after eating. In addition, it is not possible to know whether the environment in which the food is grown is contaminated or otherwise, so natural foods are not necessarily safe. No matter what kind of carcinogen, only when it reaches a certain level will it produce adverse reactions to human body. Occasionally eating a small amount of carcinogen-containing food will not affect health. Error rate third place: The "Measures for the Administration of Traceability of Food Safety Information in Shanghai Municipality," which was implemented in tandem with the newly revised "Food Safety Law", stipulates which of the following foods should be retrospectively managed by Shanghai: (BCD) A. Alcohol B. Edible Oil C. Infant Formula D. Pork Analysis: Shanghai Municipality implements information traceability management for the following categories of food and edible agricultural products: production (including planting, breeding, processing), circulation (including sales, storage, transportation), and catering services within the administrative region of Shanghai. And its products; 2. Livestock products and products; 3. Poultries and their products, products; 4. Vegetables; 5. Fruits; 6. Aquatic products; 7. Soy products; 8. Dairy products; 9. Edible oils; Other types of food and edible agricultural products approved by the Municipal People's Government. Error rate 4th: Which of the following foods belongs to the newly revised "Food Safety Law" that requires strict supervision and management of food? (ABD) A. Formula food for special medical purposes B. Health food C. Import food D. Infant formula food Analysis: Article 74 of the "Food Safety Law" stipulates that the State shall strictly supervise and manage special foods such as health foods, formula foods for special medical purposes, and infant formula foods. 5th error rate: The labels and instructions for health food products shall not be involved (D), and the contents shall be true, consistent with the contents of registration or filing. A. Disease Prevention and Treatment B. Functional Efficacy and Treatment Function C. Adjuvant Therapy and Disease Prevention D. Disease Prevention and Treatment Function Analysis: Article 78 of the "Food Safety Law" stipulates that the labels and instructions for health food products shall not involve disease prevention and treatment functions, and the contents shall be true, consistent with the contents of registration or filing, indicating appropriate population, inappropriate population, and efficacy. Ingredient or symbolic ingredient and its content, etc., and declare that "this product cannot replace medicine". The functions and ingredients of health food should be consistent with the label and the instructions. Error rate 6th: If a food safety crime is sentenced to more than one sentence of imprisonment, it shall not be engaged in the food production, operation and management within five years, nor shall it be the food safety manager of a food production and operation enterprise. (×) Analysis: The "Food Safety Law" stipulates that if a food safety crime is punished by more than one sentence of imprisonment, he may not be engaged in food production, operation, or management for a lifetime, nor may he be a food safety manager of a food production and marketing company. Error rate seventh: Regarding food additives, the following statement is wrong (ACD). A. Natural food additives are safer than synthetic ones B. Melamine, Sudan Red, Clenbuterol Hydrochloride are not food additives, and they are illegal additives. C. Food additives are harmful to health and should be prohibited from use. D. Foods allowed by developed countries Additives can be used in China Analysis: Food additives can be divided into natural and chemically synthesized two categories according to their sources. Food additives produced and used according to national standards are safe and non-toxic. Melamine, Sudan Red, and "Clenbuterol" are all included in the "List of Non-edible Substances that May Be Illegally Added to Food". The use of food additives and the scope of use are clearly stated in the "Standards for the Use of Food Additives." The food additives that are allowed to be used in developed countries must meet the national food safety standards in China. 8th error rate: Canned foods can be added without any food preservatives. (√) Analysis: Canned food refers to raw materials that have been pretreated and sealed in iron cans, glass bottles or high-barrier composite plastic bags, and then heat-sterilized to achieve commercial sterility to extend the shelf life of foods. Because in the above-mentioned heat sterilization process, spoilage bacteria, pathogenic bacteria, and toxigenic bacteria that can breed under normal storage and sales conditions and cause food spoilage can be killed, and the requirements for commercial asepsis are met, so that the canned food does not need to be added at all. preservative. 9th error rate: In general, which of the following edible fats and oils is most suitable for frying oil? (B) A. Corn Oil B. Palm Oil C. Soybean Oil D. Sunflower Oil Analysis: According to current national standards, linoleic acid in sunflower oil, corn oil, soybean oil and palm oil (C18: The contents of 2) were 48.3% to 74%, 34% to 65.6%, 49.9% to 59%, and 9% to 12%, respectively. The thermal stability of linoleic acid is relatively poor, especially in the process of high temperature frying in a long time, it is easy to happen oxidation. Studies have shown that linoleic acid produces harmful substances in humans during a long period of high-temperature frying. The main fatty acids of palm oil are palmitic acid (39.3%~47.5%) and oleic acid (36%~44%). The thermal stability of these two fatty acids is far superior to linoleic acid, and the oxidation of these two fatty acids The harmful substances are also far less than linoleic acid. Experiments have also shown that palm oil has better oxidative stability than soy oil and sunflower seed oil during long-term high-temperature frying and is more suitable for frying. Error rate 10th: Press oil is safer than leaching oil after refining. (×) Analysis: "Leaching oil" is the principle of applying chemical extraction, using an organic solvent that can dissolve oils and fats, through the contact with the oil, the oil in the oil is extracted. The state has strict regulations on the residual limit of organic solvents and will not cause harm to the human body. Consumers need not worry about food safety. "Pressed oil" is a physical pressing method. The oil is subjected to deaggregation, and then crushed, steamed and fried, and squeezed to remove the oil from the oil. The oil produced in this process is only “hair oilâ€, and it needs to undergo various post-processing processing. It is in compliance with relevant national standards and is a qualified oil product.
PCR ( Polymerase Chain Reaction)
SARS-Cov-2, One test type that uses a sample from a nose or throat swab in a 'PCR test'. The goal is to make enough copies of the viral cDNA in order for it to be detectable.
Superyears General 2215 RT-qPCRadopts all-in-one with an industrial art design, combining the Analytical Instrument, Large touch screen, and Computer. General 2215 RT-qPCR is equipped with the proven thermal-cooled electric technology, which can recognize the speed rate of temperature control faster and obtain high-quality testing results within 40 minutes. To ensure the sensitivity and stability of the testing a design with traditional beam path with a susceptible CMOS image sensor is used. In addition, General 2215 supports multiple PCR analysis and High-resolution Melt Curve (HRM) analysis, compatible with the mainstream reagent kit in the market. It will be the best assistant and your preferred RT-qPCR.
Rt-Pcr For Sars-Cov-2 Testing,Real Time Pcr Machine Kary Mullis,Pcr Machine Covid-19 Nucleic Acid,Qpcr Machine Covid-19 Omicron Detection Nanjing Superyears Gene Technology Co., Ltd. , https://www.superyearsglobal.com
It provides a way to make more copies of a portion of DNA.
We need to have PCR ingredients that include DNA portion, Buffer solution, Primer+DNA (tap polymerase), and Nucleotides during the preparation step.
In the step of PCR sequence, there are three steps in this section.
Step 1 Denaturation
The addition of heat is needed to separate the two strands of the DNA molecule.
Step 2 Annealing
Temperature, is going to be cool in this step, should allow the primers to bind to the specific segments.
Step 3 DNA Synthesis
To make more copies of the DNA.
Those three steps above keep repeating to make enough copies of the DNA fragments. It is the principle of how PCR machine works.