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  • Microorganisms are small. So small you can't even see them unless they cluster together.

    微生物是小的。 如此之小,你甚至無法看到它們,除非它們聚在一起。

  • Each of these dots is really millions of bacteria.

    每一個小點其實都是數以百萬計的細菌。

  • But down at a microscopic scale, mold and bacteria fight vicious battles.

    但在微觀尺度上,黴菌和細菌打起了惡戰。

  • Their resources and territory are scarce

    他們的資源和領土都很稀缺

  • and the stakes are survival.

    而賭注是生存。

  • Mold has a powerful chemical weapon in its arsenal.

    黴菌的武器庫裡有一種強大的化學武器。

  • I'm Emily, and I'd like to show you Alexander Fleming's famous

    我是艾米麗,我想給你看亞歷山大-弗萊明的著名的。

  • discovery that bread mold kills bacteria.

    發現麵包黴菌可以殺死細菌。

  • Here's some fresh bread.

    這裡有一些新鮮的麵包。

  • I'll add some water because mold loves moisture.

    我'會加一些水,因為黴菌喜歡潮溼。

  • Now I need bacteria, which you can find basically anywhere,

    現在我需要的是細菌,你基本上可以在任何地方找到。

  • including in your mouth.

    包括在你的嘴裡。

  • This petri dish has a jello-like layer of agar:

    這個培養皿裡有一層類似果凍的瓊脂。

  • food for the bacteria in my saliva.

    唾液中的細菌的食物。

  • It'll take a few days before the colonies of bacteria are big enough to see.

    要過幾天,細菌的菌落才會足夠大,才能看到。

  • Let's set up a place to grow the mold and bacteria in a contained way, so it doesn't spread or infect anything else.

    讓'我們設置一個地方,讓黴菌和細菌以一種封閉的方式生長,所以它不會傳播或感染其他任何東西。

  • These bell jars will help make sure that

    這些鈴鐺罐將有助於確保

  • nothing contaminates the experiment,

    沒有任何東西會汙染實驗。

  • and the experiment doesn't contaminate anything else.

    而實驗不會汙染其他東西。

  • I'm back!

    我回來了!

  • Wow! There's a lot of bacteria!

    哇! 細菌真多啊!

  • Each cell divided and divided and divided to make a colony

    每個細胞分了又分,分了又分,形成了一個菌落。

  • that we can see now.

    我們現在可以看到。

  • Some bread mold also grew.

    也長出了一些麵包黴。

  • Let's see if it can kill some bacteria.

    讓我們看看它是否能殺死一些細菌。

  • I'll take a chunk of bread mold and let it do its work.

    我'會拿一塊麵包模子,讓它發揮它的作用。

  • Legend has it that in Fleming's original experiment,

    傳說在弗萊明'最初的實驗中。

  • some mold from his lunch sandwich accidentally dropped into his petri dish.

    一些黴菌從他的午餐三明治不小心掉進了他的培養皿。

  • Let's take a closer look,

    讓我們'來仔細看看。

  • and we'll come back later and see what's changed.

    和我們'以後再來看看有什麼變化。

  • Under a microscope mold looks something like this yellow model,

    在顯微鏡下模具看起來像這個黃色的模型。

  • and mold attacks bacteria cell walls, represented by these cups.

    和黴菌攻擊細菌細胞壁,代表這些杯子。

  • Mold secretes a chemical: penicillin,

    黴菌會分泌一種化學物質:青黴素。

  • which damages bacteria cell walls, stamping out the competition.

    破壞細菌細胞壁,阻斷競爭。

  • This means the bacteria surrounding the mold will die.

    這意味著黴菌周圍的細菌會死亡。

  • We're looking for bacterial death around the mold.

    我們'正在尋找模具周圍的細菌死亡。

  • Do you see where the bacteria have died around the mold?

    你看模具周圍的細菌都死了嗎?

  • This is called the ring of death.

    這就是所謂的死亡之環。

  • Mold and bacteria have been battling for millions of years.

    黴菌和細菌已經爭鬥了數百萬年。

  • Mold keeps coming up with new weapons: antibiotics;

    黴菌不斷想出新的武器:抗生素。

  • and bacteria keeps coming up with new shields: resistance.

    和細菌不斷想出新的盾牌:抵抗力。

  • Alexander Fleming, after treating wounded soldiers in World War One, was the first person

    亞歷山大-弗萊明,在第一次世界大戰中治療傷兵後,是第一人。

  • to realize how useful antibiotics are for treating infection.

    以認識到抗生素對治療感染的作用。

  • Today we remember him for his discovery of penicillin.

    今天我們紀念他是因為他發現了青黴素。

  • I think his experiment is really neat, and I hope you do, too.

    我覺得他的實驗真的很整齊,我希望你也是。

Microorganisms are small. So small you can't even see them unless they cluster together.

微生物是小的。 如此之小,你甚至無法看到它們,除非它們聚在一起。

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Bread Mold Kills Bacteria

  • 71 2
    李應振 發佈於 2013 年 02 月 04 日
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