Sunday, March 05, 2006

Movies Ellie and I Want To Watch

So we're watching the Oscars, and there are a few movies that we're both thinking we'd like to see:

Walk the Line
Hustle & Flow
Brokeback Mountain
Pride & Prejudice
North Country
Hotel Rwanda

And there are a few that I'd probably want to watch with or without her:
The Constant Gardener
A History of Violence
Batman Begins
Enron: Smartest Guys in the Room
The Squid and the Whale

Thursday, March 02, 2006

Actual Research about Teflon (You can FWD if you like)

I don't know why people are so willing to quickly believe what they hear on the radio/tv, but a lot of the scare stories you hear on the news are crap. If people don't want to use Teflon because it scares them, they are free to make that choice (I love choice, that's why I'm a Liberterian). I just don't think they should make it based on flawed information. We're exposed everyday to compounds that can cause cancer (acrylamide in French Fries anyone), yet we're living longer, healthier lives. Something is wrong with the picture. Let's stop worrying ourselves to death, and live the how we want without anxiety about cancers and heart disease (because we all die at some point). Live while the living is good!

This is an abstract for a paper that demonstrates there is NO DETECTABLE PFOA released into water (a common solvent) or water/ethanol (a solvent that can better pick up fat soluble materials) when they were placed in consumer cookware and heated to boiling or higher temperature. I think this statement from the paper also provides useful insight:
"The absence of PFOA from the coated cookware was not surprising. Fluoropolymers are typically manufactured near ambient temperature. Fabrication processes, such as those used to coat cookware, require temperatures of greater than 300 °C (typically 350 to 450 °C). These temperatures, and the large surface area of the coating material, would easily vaporize any PFOA (boiling point 189 °C 17) that may have originally been present. Also, Krusic and Roe 18 conducted gas-phase NMR studies where the ammonium salt of PFOA was observed to completely decompose within minutes at 234 °C."

Analyst. 2005 Sep;130(9):1299-302. Epub 2005 Jul 28. Related Articles, Links
Click here to read  
Determination of perfluorooctanoic acid (PFOA) extractable from the surface of commercial cookware under simulated cooking conditions by LC/MS/MS.

Powley CR, Michalczyk MJ, Kaiser MA, Buxton LW.

Haskell Laboratory, E.I. du Pont de Nemours and Company, P. O. Box 50, Newark, DE 19714-0050, USA.

Salts of pentadecafluorooctanoic acid (PFOA) are polymerization aids used in the manufacture of fluoropolymers; one of the applications of fluoropolymers is the coating of metal cookware products. A method was developed to determine if PFOA might be present in and extracted from the surface of commercial frying pans coated with a DuPont fluoropolymer under simulated cooking conditions. Commercial grade cookware was obtained, then extracted with water and ethanol/water mixtures at 100 and 125 degrees C, and the resulting extracts were analyzed by liquid chromatography tandem mass spectrometry (LC/MS/MS). Detection and quantification limits as low as 100 pg cm(-2) were demonstrated. None of the fluoropolymer treated cookware samples analyzed showed detectable levels of PFOA when extracted under simulated cooking conditions.

This abstract is for a paper that indicates PFOA is not likely to be a risk either.
Environ Sci Technol. 2005 Jun 1;39(11):3904-10. Related Articles, Links

Exposure assessment and risk characterization for perfluorooctanoate in selected consumer articles.

Washburn ST, Bingman TS, Braithwaite SK, Buck RC, Buxton LW, Clewell HJ, Haroun LA, Kester JE , Rickard RW , Shipp AM .

ENVIRON International Corporation, 6001 Shellmound Street, Suite 700, Emeryville, California 94608, USA.

An exposure assessment and risk characterization was conducted to better understand the potential human health significance of trace levels of perfluorooctanoate (PFO) detected in certain consumer articles. PFO is the anion of perfluorooctanoic acid (PFOA). Concentrations of PFO in the consumer articles were determined from extraction tests and product formulation information. Potential exposures during consumer use of the articles were quantified based on an assessment of behavior patterns and regulatory guidance. Health benchmarks were developed and then compared to the exposure estimates to yield margins of exposure (MOEs). A simple one-compartment model was also developed to estimate contributions of potential consumer exposures to PFO concentrations in serum. While there are considerable uncertainties in this assessment, it indicates that exposures to PFO during consumer use of the articles evaluated in this study are not expected to cause adverse human health effects in infants, children, adolescents, adult residents, or professionals nor result in quantifiable levels of PFO in human serum.