[roportal]

Astazi am citit un articol foarte interesant:
http://www.popsci.com/popsci/science/0a03b...ecbccdrcrd.html

Va fac un mic rezumat dar eu cred ca merita sa cititi intregul articol.

Dupa o munca de 11 ani Tim Kehoe a reusit sa-si indeplineasca visul:
A realizat baloane de sapun de diverse culori care nu lasa pete in momentul in care se sparg.

Acest lucru a fost posibil datorita descoperirii unor vopsele care isi schimba structura prin frecare.

Citeaza

Sabnis's solution was to build a dye molecule from an unstable base structure called a lactone ring that functions much like a box. When the ring is open, the molecule absorbs all visible light save for one color—the color of the bubble. But add air, water or pressure, and the box closes, changing the molecule's structure so that it lets visible light pass straight through. Sabnis builds each hue by adding different chemical groups onto this base.

Aceasta postare a fost editata de roportal: 03 December 2005 - 12:54 PM

[eagle]

Interesant. Dar pacat ca nu mai suntem copii pt balonase de sapun care contin si vopsele.

[LikeThisPoppy]

ce dragute sunt!!!