In a solution, nanotubes separate one by one and are contained in beads made from alginic acid fibers. The beads have a porous surface, allowing toxins that permeate the bead to wind up being stuckon the surface of the nanotube. The beads are then placed, in a filter, letting air and water pass and eliminating the pollutants.

1. disassembling → separating
2. into each one nanotube → one by one
3. Very nice word!
4. permeated → that permeate
5. While air and water do flow, we normally don’t “flow air”. Perhaps, “As air and water flows…” or “As air and water passes through the filter…”.li>

1. Very good word choice.

1. very good word choice
2. ⇒ The beads have a porous surface
3. ⇒ hazardous substances permeate
   Nothing wrong with “hazardous substances” but to avoid repetition we have other options available. For example, “toxins”, “pollutants” and “impurities”.
4. ⇒ as air or water is passed

1. More than just dust, these 有害物質 would be better translated as “toxins” or “pollutants”.

1. penetratedをthat penetrateに訂正。
2. これでは、ビーズがどこに incorporate されているかわからない。The beads are placed inside a filter. などを付け加える。

Vocabulary
○ 一本ずつ

• ”into each nanotube”, “into individual nanotubes”, “one-by-one” などどれもよいが、コンパクトな “one-by-one” がよいであろう。
• “one-by-one” は「結果」を表すのではなく「プロセス」なのではないか。非常によい指摘であり、そのとおりかもしれないが、それでもここは “one-by-one” がよいであろう。

○ 分離

• ”separate”, “isolate” などが使える。”disassemble”, “disperse” はちょっと意味がずれる。
• ”isolate” はプロセスのニュアンスがあるように思う。例えば、動物園で動物たちが群れているのを離すときに使ったりする。”isolate them from each other (one-by-one)” など。「強制的に」、「罰のために」といったニュアンスが含まれるように思う。

○ すき間

• ”pores”, “porous (adj.)”, “openings”, “apertures”, “interstice” などが使える。ただし、“openings” は、”tiny”, “minute”, “very small” などと組み合わせて使用したほうがよい。”pore” にはすでにそれらの意味が含まれている。
• “apertures”, “interstice” は scientific な言い方。
• ”gap” は通常比較的大きいものを指すため、この場合は不適当。”tiny gap” とは言えない。
• “apertures”, “interstice” は scientific な言い方。

Eyes Wide Shut (Kubrick movie), Holy War, Business Ethics, Microsoft Customer Service, Abnormally Fat
(Oxymoron Database, http://www.derkarl.org/oxymorons.phtml)

○ 閉じ込める

• ”encapsulate”, “confine”, “contain” などが使えるであろう。

Although it was known that toxins have a tendency to stick to nanotubes, because similar nanotubes tend to bundle together the process for separating nanotubes hasn't been that effective until now. By using a solution, however, known as a surface-active agent, Fugetsu has successfully separated the nanotubes from one another, in turn creating a wider surface area to adsorb toxins.

1. an attribute → a tendency
2. the attribute was not → this attribute has not been
3. A better verb in this context would be “bundle”. We often use “bundle” when grouping together long, cylindrical objects like branches or sticks for firewood, for example. Also, “bunch together” would be another suitable option.
4. nanotube → 複数形 nanotubes にする。
5. I would use the word “thus” sparingly and limit it to only time per paragraph.
6. thus the area which adsorb toxic substances is greatly increased → thus greatly increasing the area which can adsorb toxic substances

1. Excellent word choice.
2. “Cling” is perfectly fine but other suitable verbs would be “bundle together” or “bunch together”. These verbs are often used when talking about cylindrical objects, like sticks and branches for firewood, for example. I would, however, be careful using “block” because that word tends to indicate a square or rectangular-like shape which may not accurately describe the appearance of the nanotubes bundled together.

1. easily bond

1. Right on. This is exactly the wording you want to use in this context. Long cylindrical objects tend to bundle or bunch together, like sticks or branches for firewood.
2. Is this agent, in fact, new?
3. The very tricky “absorb” vs. “adsorb” battle. 吸着 would be “adsorb” where as 吸い取る would be “absorb”. We will discuss in class.

1. to cluster または to bundle together に変更。
2. their に変更。
3. separated に変更。
4. that increases に変更。
5. 訂正されてはいなかったが、hazardous substances が nanotubes にstick する、としたほうがよい。
6. 訂正されてはいなかったが、ampholytic surfactant に訂正。

Vocabulary
○ くっつきやすい

• 「ナノチューブが有害物質にくっつく傾向をもつ」としている人が多いが、「有害物質がナノチューブにくっつく傾向をもつ」、「nanotubesがattractする」とするほうがよいであろう。
• ”adhere”, “stick”, “bond” などが使えるであろう。“stick” は一般的な単語であり、”adhere” はややscientific。
• “couple” は対になるものに対して使う。

○ かたまってしまう

• ”cling together” は、全部がくっついていなくてよく、“some light contact” の場合に使う。
• “cluster” はぐちゃぐちゃにくっついている感じ。
• “stick (to form a cluster) はよい。ただし、“stick” はべたべたとくっついている感じか。この場合は、べたべたしていなくてもよいかもしれない。
• ”merge” は融合して１つになる感じなので不適当。
• “long cylindrical object” が互いにくっつくときに使う動詞は、“bundle”, “bunch” がよいであろう。これらは、名詞としても使え、その場合には、“the nanotubes form a bundle”, “the nanotubes form a bunch” となる。
• “long cylindrical object” は、野菜（セロリ、にんじん）でもなんでもよい。

○ 両性界面活性剤

• ”ampholytic surfactant” がよいであろう。

参考サイト

http://www.oti.globalwatchonline.com/online_pdfs/36318X.pdf
Dr. Furutsuki of Hokkaido University has developed a material using carbon nanotubes that can remove toxic substances such as dioxins. The material has a much greater capacity to absorb dioxins (up to 80 times by weight) compared to activated carbons. Each nanotubes is separated by an ampholytic surfactant solution and confined in beads made of alginic acids fibers. Toxic substances are trapped on the surface of the nanotubes in the beads. The material is expected to have a number of applications including clean up of gas from waste incinerators.
(1 April 2005 Nikkei Shimbun)

http://physicsweb.org/articles/news/7/6/19/1
Nanotubes go their separate ways
27 June 2003

When single-walled carbon nanotubes are made, a mixture of both metallic and semiconducting nanotubes is produced. Now, two researchers Ralph Krupke and Frank Hennrich at the FZK research centre in Karlsruhe and colleagues at Karlsruhe University have developed a technique based on electrophoresis that can extract the metallic nanotubes from such a mixture. The ability to separate nanotubes like this will be essential if devices made from nanotubes are to become a reality (R Krupke et al. 2003 Sciencexpress 1086534).

Single-walled carbon nanotubes have enormous potential as the building blocks in nanoscale electronics. Nanotubes are essentially rolled up sheets of graphite, and they can be metallic or semiconducting depending on the direction in which the sheet has been rolled up. Metallic tubes could function as nanoscale leads, and semiconducting tubes as nanoscale transistors. However, until now, no efficient separation techniques have been reported.

Krupke and Hennrich wired a microelectrode array, which provides a strongly inhomogeneous electric field, to a radio frequency generator and then applied a drop of solution containing the nanotube mixture to the electrodes. They observed that the metallic tubes were attracted towards the microelectrode array, while the semiconducting tubes remained in the solution.

The two types of nanotubes move in different directions along the electric field gradient because the semiconducting nanotubes have a smaller dielectric constant than that of the solvent, while the metallic nanotubes have a larger constant. Raman spectroscopy confirmed that separation had taken place.

The researchers say that their technique, which can remove metallic nanotubes with about 80% purity, “marks a major advance towards the realization of nanotube-based electronics”. They also believe that any applications of nanotubes that are based on optical properties -- which are closely connected to electronic properties -- could also benefit from the method. At present, the separation only works for small volumes, but the team hopes to upscale its experiment by using microfluidic techniques that are commonly used in biology.