Showing posts with label silicone. Show all posts
Showing posts with label silicone. Show all posts

Monday, April 22, 2013

#ChemMovieCarnival: Act Three

Click here for Part 1 and Part 2

The directors are directing, the editors editing, the key grips gripping, supporting actors supporting, and the best boy...well, whatever he does, he's doing!

17. John of It's the Rheo Thing recaps the extra-fun chemical err....duplicity, in a movie by the same name. Honestly, this might be the first silicone-meets-Hollywood post that doesn't revolve around typical body modifications (it's a hair gel, folks). Bonus points for an accurate assessment of acting talents.
Film: Duplicity

18. For a post where she's (allegedly) avoiding discussing chemistry (or physics!), Renee really captures the teen angst vs. science teacher influence angle. Not to dis Jena Malone, but antiseptics are more than just fancy soap.
Film: Donnie Darko

19. Chemically Cultured primes our minds to the existence of hardtofindium, dalekanium, dilithium, and the new vogue fake element, unobtainum. Tom, I'd really like a copy of that poster!
Films: Avatar, Star Trek, Star Wars, The Core

20. Smells like three things in this post: burning thermite, methylamine, and the start of #RealTimeChem week! At Chemistry Blog, Mark lets the sparks fly, but doesn't seem to have perfected Walter White's lock-picking technique yet.
TV Show: Breaking Bad

21. New blog alert! Tien, of Must Love Science, covers the *cough* physics *cough* of a well-loved SciFi epic. Simulated gravity? There must be an extra-large chunk of dark matter outside each ship, no?
TV Show: Battlestar Galactica

22. Next, another Chemistry Blog stalwart discusses chemistry moments cropping up in his favorite crime drama. Azmanam's doppelganger (Dr. Spencer Reid) encounters some interesting cases, like that one where the bad guy dunks his victims in methanol to preserve their scent. (Bleargh!).
Also, plywood!
TV Show: Criminal Minds

23. Curt wrote this excellent entry, and he writes a pretty good blog, too: Minglingken, Mixing Knowledge. In this post, we have Russell Crowe, a good-guy whistleblowing biochemist, up against the wall of Big Tobacco. I never knew coumarin was used in cigarettes...
Movie: The Insider

Honorable Mentions: Vittorio and Gavin Armstrong sent along these "science-y" pictures from various forensic TV shows:

Assuredly not poly(vinyl acetate)
Show: Dexter
Hey, look, it's nitrogen! At least it's not chicken soup this time...
Show: NCIS
Want to play along? There's still time! Email me at seearroh_AT_gmail, or tweet (@seearroh)

Update 4/22/13 - Added minglingken entry; assigned authorship to Curt (thanks!)

Saturday, March 31, 2012

Pictures of the Month - Turbines and Beams

I don't know what it is about late March. Spring has sprung, flowers are blooming, grass growing green...and researchers are releasing killer images and wild papers at breakneck speed. This week, two images really caught my eye - a heart turbine, and a molecular beam generator. 


Artificial dual-turbine heart | Credit: New Scientist / Jeremiah Zagar
First up, a still from the short film Heart Stop Beating, shown courtesy of New Scientist TV. You're not imagining things - that's a dual-turbine pump, in a man's chest cavity! What's more, the man in question, Craig Lewis, lived for 5 weeks with this device in his chest, apparently no worse for wear, and died of an unrelated condition. 


In a Popular Science article from last month, one of the doctors behind the tech, Billy Cohn, described the materials used to construct the heart turbine:
"The materials needed to be blood-friendly. The structure needed to be resilient to deformation. It had to be formable in a limited space. We needed to be able to sew it, but the needle holes couldn’t let blood leak. And we had to be able to customize it in the OR by cutting it. I bought some ordinary Dacron from the fabric store and RTV silicone from Home Depot to impregnate the outside. I did all this in my garage."
Here's my question: What other materials could we construct replacement hearts out of? Perusing the stent literature, it seems like medical device makers try two different tactics: either a non-allergenic metal alloy, like nitinol (Ni-Ti) or cobalt chromium; or a biodegradable polymer, like a polyamide or poly-lactic acid (PLA). I'm hoping one of my materials-leaning readers could help me work through this in the comments.


Bumper Sticker: "My other car is a Molecular Beam Generator"
Credit: G. Meijer, Chem. Rev.
Next, in keeping with the "unbelievable machines" motif, here's the abstract picture for a recent Chem. Rev. on molecular beam generation. I'll admit, I'm not a physical chemist, but I would offer to learn if I got to play with a device like this! 


Molecular beams are formed, in the words of Prof. Gerard Meijer (Fritz Haber Institute | Max Planck), through a "controlled leak" from a pressurized cavity into a vacuum. Electromagnetic fields can be used to "shape" the beam, which chemists direct at targets, or smash into another beam to simulate basic binding events. My second question: What else could we do with these beams? Brief explorations into physics texts mention roles in quantum dots and nanocrystals, but I'd like to learn more. Readers?