Sun, Dec 30, 2007 - Page 14 News List

Sunday Science: Extracting DNA 提煉DNA

Welcome to Sunday Science! Every Sunday, we're going to guide you through some cool experiments that you can do at home. It's a good idea for you to keep a record of what you do in a Science Journal. That way you can record what you learn, compare results and maybe use them to design new experiments! Have a look at the Science Journal box for some ideas to get you started. Remember to always ask a grown-up's permission before trying out an experiment.

歡迎閱讀《週日科學版》!我們每週日都要為你介紹可以在家中進行的有趣科學實驗。你可以在《科學日誌》中記錄自己做了哪些活動,這樣就可以將所學的紀錄下來,比較這些結果,也許還可以利用它們來設計新的實驗!先看一下《科學日誌》的點子再開始吧。展開實驗之前,記得要獲得大人許可喔!

9.在一個乾淨的乾瓶子瓶口套上咖啡濾紙,用湯匙舀一點果泥至濾紙中,然後慢慢將所有果泥都加到濾紙中,這可能會花上一段時間,你得有點耐心。最後,你會得到一瓶液體,而果泥會留在濾紙上。將濾紙和果泥一起丟掉。

10.你得到的液體應該夠做幾個樣本。將一些液體倒入「試管」中至三分之一滿。

12.請大人幫你使用冰的酒精,先在量杯中倒入約一百毫升,然後非常緩慢地沿著試管邊緣注入酒精,讓酒精浮在液體上,形成兩層;酒精份量需要和奇異果液體差不多。

13.靜置試管,仔細觀察,在奇異果液體層上方的酒精層底部應形成一團白色海綿狀物質,這就是DNA!

14.數分鐘後,你可以將竹籤戳進DNA中纏繞,但是動作要非常輕柔,當你覺得夠多了,就可以將它拉出試管。你可以玩它,但千萬不可食用!

(翻譯︰袁星塵)

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