Lin Yongjun took reporters and shuttled through the labs where various small glass bottles were piled up. He tried his best to introduce the current controversial technology, genetically modified, to people who did not have a biological science background in the language he considered most popular. In spite of this, his professional vocabulary, indoctrination, transformation, processing and other technical terms and idioms often bring trouble to the reporter.

Among the research team of Zhang Qifa's academician, Lin Yongjun is an important scientific researcher who participated in the research and development of the two transgenic rice plants that have obtained the Ministry of Agriculture's genetically modified organism safety certificate.

Lin Yongjun thinks that the cause of the public's suspicion of the current GM rice is largely due to a gap in knowledge. Most people instinctively fear because they do not understand GM technology, which in turn makes some ideas that he believes are not correct and objective. The opportunity to spread.

The difference in the two language systems between scientists and mass media can easily cause public confusion. For example, Lin Yongjun habitually hangs “poison protein” on his mouth. He remembered reminding reporters long after: “The poisonous protein I said is right. Insects are poisonous. I'm insects. We're all used to saying this, but this protein is not toxic to humans."

Is GM rice toxic to the human body? Is there a patent trap in GM rice technology? Does genetically modified rice cause biological contamination? Is GM rice industrialization a potential food security crisis?

In view of the above-mentioned most nuanced queries, Lin Yongjun responded to reporters one by one in nearly three hours.

Why can insect-resistant rice people eat?

"Xinmin Weekly": Now the public is most worried about whether the genetically modified rice is unsafe to the human body. Why does the insects die and people eat nothing?

Lin Yongjun: The most critical reason is that the digestive environment of worms is different from that of humans.

The BT protein that we introduce into rice is actually called insecticidal crystal protein. The gene for this protein is collectively referred to as the BT gene. The thing encoded by the BT gene is called the original toxin. The original toxin is not toxic and it is not toxic to insects. Only after the target insect has eaten, go to the midgut of the worm's digestive tract, and there is an alkaline protease in the worm's midgut to digest the original toxin. Alkaline enzymes excise a portion of the original toxin protein and after removal the protein becomes a toxic protein to the worm.

This protein has a binding receptor called cadherin in the epithelial cells of the midgut. The cadherin binds to this toxic protein and is inserted into the cell membrane of the epidermis. You can imagine that a cell is licked by a hole, the cell dies, the thing eaten by the worm cannot be digested, and the worm dies.

Human digestive organs are acidic, acidic, and the original toxins reach the digestive organs of humans. Just like common proteins, they are digested into amino acids or short peptides, etc., which are absorbed through the small intestine.

The study of the BT gene has a history of more than 100 years. Now we are advocating the "green food", which only allows the use of limited pesticides. BT pesticides are biological pesticides that can be used in the production of "green food" because it is specified in the killing. While pests have no effect on the health of crops and people.

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