Pothole power for cars

Who said CDs were dead, this is, hands down, the coolest paper on screening techniques I have seen in a while. I haven’t seen the rest of the paper, not Open Access, of course, but the abstract does make it sound cool.

Microimmunoanalysis on Standard Compact Discs To Determine Low Abundant Compounds

“High-density competitive indirect microimmunoassays were performed in both sides of compact discs by direct absorption of immunoreagents on polycarbonate surface, using gold- or enzyme-labeled immunoglobulins as tracers for displaying the immunoreaction. The operational principle is based on the use of a low-reflectivity compact disc as analytical platform that allows the reflection/transmission (30/70%) of the CD reader laser beam ( 780 nm). The reflected light is used to scan the disc track keeping it in movement. The transmitted light is detected by a planar photodiode integrated on the CD drive. The variation of the optical transmission of the light caused by the immunoreaction products is related to the sample concentration. As a proof of concept, low abundant compounds, commonly used as pesticides, were detected in a 60-min total assay time, with a limit of detection ranging from 0.02 to 0.62 ug/L for 2,4,5-TP, chlorpyriphos, and metolachlor. The obtained results show the enormous prospective of compact discs in combination with CD players for multiresidue and drug discovery applications.”

Why are techniques like these important in the world of environmental analysis? Because they change the paradigm from laboratory based techniques to field based analysis. You don’t have to take a bunch of samples, spend a lot of time and money shipping them to a lab and waiting for the results. You can pop your samples into a CD player and one hour later (less than a 74 minute listening time on a CD!), you’ll have results.

Awesome stuff, I’d love to see it in action, or even try to replicate the work. It looks like you have to make some modifications to the player to make it work, but hey, there are millions of CD players that are going to be obsoleted in the next few years.

Read both these stories and go bang your head on a wall repeatedly.

Europe creates attractive clean energy scene – International Herald Tribune

But a commitment by European governments to budding clean-energy entrepreneurs is creating a more welcoming environment than in America, where erratic support and onerous financial rules have given pause to some start-ups and investors.

American ‘Coal Rush’ Hits Some Hurdles

The nation’s demand for electricity is growing, and utilities want to build new power plants to satisfy that appetite. Most of those plants — perhaps as many as 150 — would burn coal.

Well, at least the coal rush is hitting a few hurdles. But even if half those plants don’t come about, that’s still 70+ coal fired power plants, nice!

The interesting part of the IHT story to me was this.

Venture capitalists and private equity investors in North America have been more bullish, providing $3.5 billion to clean-energy developers in 2006, roughly triple the amount raised in Europe, the Middle East and Africa, according to New Energy Finance, a research firm based in London.

So, if the US had the right incentives, Americans would be investing there, creating jobs there, improving infrastructure there instead of in Europe. I guess those very “patriotic” American lawmakers don’t think that far ahead. Note also that all the tax cuts to wealthy Americans leaves a lot of cash floating around for them to invest in projects in other parts of the world. These are investments the US won’t reap a benefit on as a country, or create jobs for the working proletariat – Nice tax cuts, more patriotism, I guess. Such a poor return on investment on these tax cuts.

An update on the benzene story from last month.

Chemical & Engineering News: Latest News – Dispute Over Benzene In Drinks

In late 2005, FDA began analyzing beverages containing benzoate and ascorbic acid. The majority of samples contained either no detectable benzene or levels below 5 ppb, says Robert E. Brackett, director of FDA’s Center for Food Safety & Applied Nutrition. FDA’s results are preliminary. After its survey is complete, the agency will determine what, if any, additional action is necessary, Brackett wrote to EWG. Changes in FDA’s analytical procedures may account for the differences in results. To collect benzene in the earlier tests, FDA used a purge-and-trap method, in which the samples were heated to 100 °C for 30 minutes. Recently, the agency has been using a static-headspace methodology, which does not involve much heat. In the earlier tests, the high heat was probably creating benzene, says an FDA source who asked not to be identified.

The explanation seems to make sense. Low level analysis is riddled with instances such as these, where the analyte you’re looking for is  introduced into the sample after the fact. It is impossible to decide without looking at the protocol whether this happened or not. Since the source of the benzene is from the reaction of ascorbic acid (aka Vitamin C) and benzoate salts, notably sodium benzoate, it would have been clear to anyone doing the analysis to avoid conditions that would result in the formation of benzene during the analysis, or maybe not…

Static Headspace analysis usually involves some heating as well, at much lower temperatures for shorter periods of time, though in the case of something as hydrophobic as benzene, not much heat would be required. So, the artifacts in static headspace would in this case be lower than in purge and trap analysis.

Still not a concern in the grand scheme of aggregate benzene exposure.

This time, it’s the killer algal bloom, to add to the dying bees and the dying fish.

Algae killing birds, sealife in Calif. – Yahoo News

A bloom of ocean algae that produces a toxic acid has sickened and killed hundreds of birds, sea lions and dolphins in California, environmentalists said.

Birds and animals have been washing up on shores from San Diego to San Francisco Bay.

In the past week, 40 birds have been taken to the International Bird Rescue Center in San Pedro with symptoms of domoic acid poisoning, which attacks the brain and can cause seizures.

In previous seasons, the center might see seven birds a week, director Jay Holcomb said.

“I have been doing this work for 35 years and I have never seen anything like this as far as the number of species affected, other than an oil spill,” Holcomb said Thursday.

Domoic acid is produced by microscopic algae. Birds and sea mammals ingest the acid by eating fish and shellfish who dine on the algae.

The algae population increases or “blooms” every year as the ocean waters warm but this year’s bloom seems early, extensive and “very, very thick,” said David Caron, who teaches in the biological sciences department at University of Southern California.

“In five years of study I have not seen a bloom this large at this particular time of year,” Caron said. “It’s having an extraordinary impact on pelicans and many other species.”

“There are conceivably thousands of animals being affected,” Caron said.

Domoic acid is a naturally occuring toxin from red algae. Increased nutrient loadings into the ocean, and warming ocean temperatures are both linked with an increasing incidence of this toxic “red tide“. It is a naturally occurring phenomenon every year, so it is hard to tease out human inputs and just plain ol’ natural variation. One more thing to keep an eye on, I guess.

Statutory Disclaimer: I don’t actually believe in the rapture – it’s just a cheap rhetorical trick.