Name: TED-Ed】通過餐具洗滌劑瞭解細胞膜--Ethan Perlstein。 (【TED-Ed】Insights into cell membranes via dish detergent - Ethan Perlstein)
Uploaded: 2021-01-14T04:50:17.000Z
Duration: 3 min 50 s

A cell membrane must be both sturdy and flexible.

細胞膜必須要又穩固又有彈性。

──可以把細胞內部保存得很好，

but horrible at letting materials flow in and out.

would go too far in the opposite direction -

So, the ideal membrane falls somewhere in the middle.

所以，理想的細胞膜 應該介於中間。

we've learned a lot about the way membranes work.

我們在細胞膜的運作方式這方面 學到了很多。

a German woman named Agnes Pockels was doing dishes.

一位叫做 Agnes Pockels 的德國女性 在做菜時發現的。

reexamined the problem with a more elaborate contraption

用更精細的發明 再次檢驗這個問題，

were in fact a single layer of oil molecules.

實際上就是 單一一層的油分子。

that loves water and floats on the surface,

是喜歡水的，所以飄浮在水的表面；

So what does it have to do with cell membranes?

還有一側厭水端。 （譯註：或稱疏水端。）

我們現在把這個物質 叫做脂質。

They designed an experiment meant to test

or two layers stacked on top of one another,

whose size Gorter and Grendel could measure.

而 Gorter 和 Grendel 可以測量它的大小。

If they compared the surface area of that monolayer

to the surface area to the intact red blood cells,

To understand the design of their experiment,

If you measure the surface area of what you see,

you'll get the dimensions of a single slice of bread

The open sandwich is the monolayer formed

by extracted cellular lipids spreading out into a sheet.

它是由萃取的細胞脂質 擴散成一個平面。

The closed sandwich is the intact red blood cell membrane.

而蓋好的三明治就相當於 完整的紅色球細胞膜。

Low and behold, they observed a two-to-one ratio,

驚奇的是，他們發現了 2 比 1 的比例，

So almost 30 years before the double-helix structure

involving fancy versions of household materials

它包含了對家務事的新潮想法，

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TED-Ed】通過餐具洗滌劑瞭解細胞膜--Ethan Perlstein。 (【TED-Ed】Insights into cell membranes via dish detergent - Ethan Perlstein)

elaborate

demonstrate

basically

structure