Cr. A Investigation

This unit is called inventions & inventors. We have a unit question to answer. The question is that ‘How do inventors come up with ideas and create their inventions?’
For this unit everyone in grade 9 chose their inventions and I chose penicillin. I chose it because I have heard a lot of information about it. Also, my mother was a nurse, so she could help me while I research it. At the end of the lesson everyone should present their research. I decided to present with essay, but it would be changed while I research about my invention.
Penicillin is the most well known antibiotic. Also, it is the first antibiotic. Lots of people tried to invent antibiotic. Some of them figure out that some fungi kill the bacteria, but he wasn’t supported well and couldn’t keep the experiment. In 1929, Alexander Fleming an English medical researchers accidentally realized that blue-green mild killed all the bacteria. It was the first penicillin, but this was not used for many people. During World War 2 there were lots of injured people who need medicine. So penicillin was being produced in large quantities.
1. Penicillin." Wikipedia. 1 March 2010. Wikipedia Foundation Inc.,, Web. 1 March 2010. .
2. ESLlibrary.com. Chewing Gum. Red River Press Inc., 2007

1. What other drugs are used in same way as penicillin?
Cephalosporin, amino glycoside, tetracycline, chloramphenicol, polypeptide, and quinolone


2. Are there any side effects in the other antibiotics? What are the benefits of penicillin compared as the other antibiotics?

bactericidal against sensitive strains
relatively non-toxic
have excellent tissue penetration
effective in the treatment of infections
relatively inexpensive compared with other antibiotics.

3. How much did the penicillin cost when it was created at first? How much does it cost now?

4. Are there any differences between the cost when it was invented first and now? If there are some differences, why are there differences?

5. What’s the penicillin made out of?
It is made out of penicillin fungi.

Evaluation

Evaluation

Tsolmon and I designed an ice bowl which would keep the bowl cold for a while. It was realistic but there were several problems. First, an ice bowl is not necessary thing. It is available when you eat ice cream, so people who don’t like eating ice cream, will not buy it. Furthermore, it is not easy to keep the bowl cold. Ice in the bowl will make the bowl cold, but after some minutes the ice will melt and the ice cream or something else that was in the bowl will melt either. Outer layer of bowl is made out of china and it will be broken easily. If you pour water in the space between stainless steel layer and china layer the china layer could be cracked and the steel layer would be crooked. After that it will not be able to use it. This problem occurs because as the water become ice the volume of water is expanded.

The ice cream ice bowl is possible to make, but it will be hard to be use by many people.

At the beginning of this unit, I was researching about the skills and technologies that keep something cool or hot for a long time and I found an electrical mat. There are some tubes underneath the mat and the tubes heated by electric and become hot or warm. So I suggest to Tsolmon that tubes around the bowl. It was the beginning of our idea. I cooperate with Tsolmon. I searched and found good information. I also tried her to make poster. Tsolmon and I decided to draw a bowl in the poster and I tried to draw it. But I wasn’t good at drawing bowl, so she drew it. I didn’t have anything to write in the poster, so I brought some color markers and pencils.

In the presentation, I didn’t do good job. I had nothing to tell, because I didn’t add any explanations on the poster even though I knew about our idea.