In 1973, Stanford University geneticist Stanley Cohn cut a small piece of DNA from an Xenopus chromosome and stuffed it into E. coli's circular DNA strand (Plasmid). The first transgenic species was born.
After 1978, a variety of protein drugs were produced through genetic transformation, including human interferon, human growth hormone, erythropoietin, and hepatitis B vaccine. People are accustomed to these health messengers and rarely raise objections. However, since 1999, the controversy over "genetically modified foods" has been on the horizon. In recent years, China's domestic opposition to genetic modification has been linked by waves of waves. The patterns are repeated: GM foods are toxic, GM crops are tools for foreign companies to control third-world farmers, biological weapons for the United States... In a noisy voice, China's GM crops have grown quietly. In the 1990s, China began planting genetically modified cotton, and genetically modified papayas are also placed on supermarket shelves. On August 17, 2009, the Ministry of Agriculture of China issued a safety certificate for the genetically modified rice “Huhui 1†and “Bt Shanyou 63,†and it is now in the trial stage. When the rice is widely promoted, it still has no The exact message.
The suspicion and prudence of genetically modified rice is extenuating. After all, cotton is only worn in vitro. Papaya is only one of the foods that can be selected, and rice is a food that many people can't live without. Although countries such as the United States, Brazil, and Argentina have already widely planted GM maize for food and feed, in Asia, only the Philippines has widely planted GM maize. According to the International Rice Research Institute in the Philippines, genetically modified rice “Golden Rice†will also be first commercially grown in the Philippines in 2013. What factors contributed to the Philippines becoming Asia's "first person to eat crabs"? What is the effect of genetically modified corn on the Philippines? With these questions, the reporter recently came to the Philippines to personally investigate the status of GM agriculture in the Philippines.
The reporter found that the process of experimentation and promotion of genetically modified corn in the Philippines was also full of resistance. During the experiment, there were anti-genetically modified non-governmental organizations (NGOs) to test fields to remove genetically modified corn grown there, and even some people were in the Philippine Ministry of Agriculture office building. Outside there is a "hunger strike." However, these eventually failed to stop the GM corn from spreading over the green fields of the Philippines and put people on the table. The influence of the group of scientists, the will of the government, and the support of the farmers are the biggest driving forces. The real entry of GM corn into supermarkets and food stalls was surprisingly surprising. The vast majority of consumers did not seek the “identity†of food in the mouth, and food safety incidents related to “GM maize†were never found on this land. .
As for the argument that “GM is a weapon of imperialismâ€, the reporter did not find tangible evidence but instead saw various complex and delicate relationships surrounding genetically modified staple foods. The seeds of genetically modified crops are mainly from American companies, but they are used by the Philippines’ leaders as one of the important means to solve the food security problem; NGOs organized by Philippine scientists debate GM issues and NGO-reversal of genetics; the preferred genetically grown maize in the Philippines— Monsanto's MON810 uses Pioneer's corn as the basis; Syngenta has transferred its own genetically modified "golden rice" technology to the largest agricultural research institute in Asia - the International Organization for International Rice Research (IRRI) ), and this technology will be promoted by the Philippine government to benefit the general low-income population...
During the interview, the general voice heard by reporters was that, in the context of agriculture, transgenes are only a technology. There is no evidence that this technology can endanger human security. The questioning of genetically modified foods can be extenuating, but all doubts should be based on solid evidence, not rumors or ignorance.
The full name of XPS (extruded polystyrene) is Extruded Polystyrene Foam Board.
It is a rigid foam board made of polystyrene resin as raw material plus other raw materials and polymers, heated and mixed while injecting the catalyst, and then extruded and molded. Its scientific name is Xps Extruded Polystyrene Foam Insulation Board (XPS for short). XPS has a perfect closed-cell honeycomb structure. This structure allows XPS boards to have extremely low water absorption (almost no water absorption), low thermal conductivity, high compression resistance, and aging resistance ( There is almost no aging decomposition phenomenon under normal use).
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