Summative self-assessment

Oh, Time is up.
This semester is going to finish, for the class, I have some knowledge gained. I think share some knowledge with classmates and teacher on this blog is very interesting, but choosing a good topic is not really easy. I selected a topic that related on my major, and I think it will be interesting for them because I think they didn't know about this field at first. But when I typed my articles, and thought about what I could introduce, that was really a difficult task for me. At last, I just introduce some simple idea for them.
For the class, teacher is always concentrating. I think that recording our text conclusion is very good for us. Because we could practice speaking and thinking, also we could practice how to summary a big article to some sentences. For listening, I hadn't listen the article that's so long and so many times. I always lost in thought when I listened the radio, but teacher replayed the radio for many times, then I could make my self more concentrated on listen.
For this semester, I think I have a little bit progress on this class. Just like now, I can type my knowlegde gained fluency, although there are some words or grammer I have to check it!
I will plan to practice English or Japanese everyday, I think I could figure out the good way for me!:)

self-assessment(3)

For the last articles, I want to introduce some professional contents for my classmates and teacher, on the other hands, I don't know what I introduce will be more interesting and attrictive to them. The topic is my professional, so I think no everyone will understand what I want to express, or what I said. Maybe I will choose a easy topic to introduce for you.

Escherichia

It is a common bacteria that I think you always know it. I already introduce a probiotic bacteria and a pathogen. For me, I think Escherichia.coli is good also bad bacteria.

WHY?

This bacteria could distributed to five type of infection. No matter what type of E.coli, its always release the enterotoxin, and make the infectious people get dysentery, or hemolytic uremic syndrome.

On the other hands, in many food examined standard, E.coli has be the standard microbes. For potable water, the density of coliform microbes about 1.0 g/ml is the maximum tolerance value.

Clostridium

This bacteria is very famous in the field of beautify. Maybe you are not familier for its English name, but if I tell you its Chinese name, you will know it. It's 肉毒桿菌.

Clostridium includes common free-living bacteria as well as important pathogens. There are two main species responsible for disease in humans.

The first is C. perfingens, causes a wide range of symptoms, from food poisoning to gas gangrene.

The second is C.botulium,an organism producing a toxin in food/wound that causes botulism. Meanwhile, this species is used to beautify.For example, some people want to let her calf(of the leg) more thinner, so she injected the C. botulium. Because this bacteria will produce the neuron toxin, and make the muscle atrophied. So that, her calf will be thiner than before.

There is a special feature for Clostridium, that is, if they live in the bad environment, they will form the endospores.

This is a short video to show you how endospore formation.

http://tw.youtube.com/watch?v=KDOMyipwPK0

Clostridium is the first dangerous bacteria in food industry, so the standard of disinfectant rely mainly on Clostridium.