Saturday, October 9, 2010

What is Life? バクテリアの性(The existence of sex in bacteria)


Hi, good afternoon everyone. I am sorry, the start of this class has been little late. Yesterday, I attended the special lecture of "the message form micro world", which was held at Fukushima city by Professor Masatoshi Noda, who is the master of Japanese Society for Bacteriology. It was very interesting for me, because his lecture contains many humor for elementary school student. So, I will introduce some topics of his lecture, and explain about the existence of sex in bacteria.


I explained about multi-antibiotics resistance at 11th of September. The professor Noda introduced that there are three types of bacteria, for fermentation, recycling, and the cause of infection. And the main theme of his study are Cholera and O-157.


Professor Noda did teach us the most important point to prevent food poisoning. O-157 is resistant to acid in our stomach, but they are weak for heat. You should lean reversible reading of "O-157" that is 75 degree C for 1 min is OK. To prevent food poisoning, we have to heat foods for only 1 minute at 75 degree C. It is very simple and not so difficult. Of course we have to wash our hands before eating.


Here, I start the class of today, about the existence of sex in bacteria. This was taught by Professor Noda in the car. We are taught that the origin of sex was observed in Paramecium in text book of basic biology in University. But the professor told me that there is sex in bacteria. It was very impressed thing for us. He explained that some bacteria gave plasmid DNA for other  individual when the environment become worse. The donor is called as male, and the recipient is called as female, like us. This is the sex in the bacteria, he said so.


Today's class is over. Have a nice day. Click the button at the bottom of this What is Life?, if you are a student of this class. 

にほんブログ村 科学ブログ 生物学・生物科学へ人気ブログランキングへ

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