Category Archives: Science

Exactly how big is a kg?

Standards fascinate me. One of the most problematic standard in use almost universally today is the kilogram (kg). The problem is that no one really knows exactly how much mass a kilogram actually has. By extension that means that no one knows how heavy a pound is either since the US government defines it in relationship to the SI kg unit.

Originally the metric system was supposed to be defined in terms of “natural laws” that the common man could measure for himself. The kg was originally defined as a cubic decimeter of water under certain conditions. This is probably what you were taught in school, one of many metric misconceptions (see why everything you know about the metric system is wrong).

But that approach was jettisoned as impractical due to variations in water density, temperature, etc. In 1889 the standard became defined by a set of “physical prototypes” that were manufactured and distributed to major countries. So what was a standard based on “natural laws” became based on an arbitrary hunk of platinum and iridium.

Only that has not worked either (at least not to the number of significant digits desired). The problem is that the different physical prototypes are changing mass by a small but measurable amount. So today there is effectively no precise consistent definition of a kilogram, and thus by extension the pound.

The plan going forwards is to define the kg in terms of basic physical properties, similar to what has been done with the meter and the second. But for now, kg is only an estimate for given levels of precision.

When what you are taught isn’t true

I get a steady stream of indignant sputtering about this post on the metric system and what it means for authentication. One common point that readers make is that Celsius is better than Fahrenheit because it is based on natural law, defined as 100 degrees between the freezing and boiling point of water.

Only it isn’t, and hasn’t been for some time (at least not since 1954). While the freezing point and boiling point of water was precise enough in the 1700’s, it is no where near precise enough to act as a standard. The reason is that no two samples of water will melt and freeze at the same temperature due to variations in water purity, air pressure, and humidity.

By international convention, the Celsius scale is defined by a range between absolute zero and the thermodynamic triple point of Vienna Standard Mean Ocean Water (VSMOW). This point, by the way, is 0.01 C. And VSMOW is not ocean water  (despite it’s name), but rather is a carefully crafted lab concoction comprised of specially defined proportions of oxygen and hydrogen isotopes.

So while we are taught Celsius is defined by the freezing and boiling points of water, it is actually defined by absolute zero (which doesn’t exist in the natural world), and the triple point of a form of water that only exists in the lab.

Explain to me again, why this is less arbitrary that Fahrenheit?

And why is it still taught incorrectly in schools (at least in the US)?

54 million small dead animals later

In 2006 a lack of adult supervision allowed the EU parliament to pass an ill conceived initiative called REACH. The REACH program will require retesting for toxicity every chemical in use in the EU that predates the newer testing regimes.

Now there is a report that estimates it will cost industry 9.5 billion Euros and require 54 million test animals. All to test chemicals that are already in wide-spread use.

Scientific illiteracy is quite expensive.

Hell’s dumpster

In the Pipeline is my favorite chemistry blog. He has a regular series called “Things I won’t work with” in which he describes chemicals so dangerous the even he (as a professional chemist) won’t allow in his lab. In his most recent installment he describes a chemical so foul smelling that it made is forbidden list on that basis alone. Here he names Hell’s Dumpster:

My recent entries in this category have, for the most part, been hazardous in a direct (not to say crude, or even vulgar) manner. These are compounds that explode with bizarre violence even in laughably small amounts, leaving ruined equipment and shattered nerves in their wake. No, I will not work with such.

But today’s compound makes no noise and leaves no wreckage. It merely stinks. But it does so relentlessly and unbearably. It makes innocent downwind pedestrians stagger, clutch their stomachs, and flee in terror. It reeks to a degree that makes people suspect evil supernatural forces. It is thioacetone.

Or something close to it, anyway. All we know for sure is that thioacetone doesn’t like to exist as a free compound – it’s usually tied up in a cyclic thioketal trimer, when it’s around at all. Attempts to crack this to thioacetone monomer itself have been made – ah, but that’s when people start diving out of windows and vomiting into wastebaskets, so the quality of the data starts to deteriorate. No one’s quite sure what the actual odorant is (perhaps the gem-dimercaptan?) And no one seems to have much desire to find out, either.

Interesting research for some brave and ollifactory challenged soul.

If you haven’t read the rest of the things in the list, you should. It’s especially frightening to know there is a chemical that sets sand on fire and eats through asbestos fire brick.

Fun with chemistry

I briefly considered chemical engineering as a freshman, but it didn’t take. Had I known then what exciting lives some chemists lead I might have given it more thought. I just discovered this delightful blog category titled “Things I Wont Work With“. What kind of chemicals might scare the bejeezers out of a professional chemist? How about this:

Did I mention that this prep was performed on less than one millimole? Spirited stuff, that tetra-azide. The experimental section of the paper enjoins the reader to wear a face shield, leather suit, and ear plugs, to work behind all sorts of blast shields, and to use Teflon and stainless steel apparatus so as to minimize shrapnel. Hmm. Ranking my equipment in terms of its shrapneliferousness is not something that’s ever occurred to me, I have to say. It’s safe to assume that any procedure which involves considering which parts of the apparatus I’d prefer to have flying past me will not get much business in my lab, no matter how dashing I might look in a leather suit.

That procedure deserves a closer look, though. You can’t just crack open a can of selenium tetrafluoride whenever you feel the urge, you know. That stuff has to be made fresh, as far as I can see, and the way these hearty sons of toil make it is by reacting selenium dioxide with chlorine trifluoride. Yep, that stuff, the delightful compound that sets sand on fire and eats through asbestos firebrick.

So if you’re going to make selenium polyazides, your day starts with chlorine trifluoride and I’m sure that it just rolls along from there. Before you know it, you’ve gone from viciously reactive halogens, paused to prepare some disgusting selenium fluorides, made some violently unstable azides that explode if you stick your tongue out at them and hey, it’s dinnertime already. . .

Fun with chemistry!

A whole lot of I don’t understand it

Newsfactor.com is running the scary headline of the day:

Social Networking Linked To ‘Infantilized Lifestyle’

The gist of the article is that social networking will make us “infantilized” or “autistic” or “something”:

In case you’ve run out of things to worry about, a British scientist has raised concerns about whether social-networking sites could be harmful to your social health. But other reports indicate new ways that social networking can expand relationships.

Oxford University neuroscientist Susan Greenfield, in a debate in the House of Lords, asked if such pastimes are changing the way brains function, shortening attention spans, and possibly even contributing to the rise of autism. Greenfield is a member of the House of Lords, where she holds the title of baroness.

I suppose pointing out that serious autism is diagnosed before age 5 would have any impact on the thinking here would be too much to hope for.

But perhaps the Baroness of Scary Headlines has a mountain of hard scientific research to back this up. Not so much:

“Perhaps given the brain is so impressionable,” Greenfield said, it’s possible that “screen life” is creating a more “infantilized lifestyle,” adding that Facebook and similar sites might create short attention spans. She acknowledged, however, that she did not possess any scientific research to back up her musings, and that it was “based on a little bit of neuroscience, observations, a bit of clinical evidence.”

Greenfield noted that “there is no one single or conclusive killer fact,” although she did report that a teacher acquaintance has noticed a decline in her students’ ability to relate to others.

In other words a little bit of pseudo science, a little bit of folklore, a pinch of something a friend told her, and a whole lot of I don’t understand this whole social networking thing.

Update – from an EA spokesman:

Electronic Arts, the major video game maker, says it has heard arguments like Ms. Greenfield’s before. “It seems like a new entertainment medium hasn’t really arrived until a scientist jumps up and says it’s making us all crazy. Balancing this are studies from equally credentialed researchers that show media like videogames actually enhance problem solving and other complex brain activity,” said spokesman Jeff Brown.

Science under siege

There is this disturbing story from Make magazine (hat tip to Instapundit):

The Worcester Telegram & Gazette reports that Victor Deeb, a retired chemist who lives in Marlboro, has finally been allowed to return to his Fremont Street home, after Massachusetts authorities spent three days ransacking his basement lab and making off with its contents.

Deeb is not accused of making methamphetamine or other illegal drugs. He’s not accused of aiding terrorists, synthesizing explosives, nor even of making illegal fireworks. Deeb fell afoul of the Massachusetts authorities for … doing experiments.

Authorities concede that the chemicals found in Deeb’s basement lab were no more hazardous than typical household cleaning products. Despite that, authorities confiscated “all potentially hazardous chemicals” (which is to say the chemicals in Deeb’s lab) from his home, and called in a hazardous waste cleanup company to test the chemicals and clean up the lab.

Pamela Wilderman, the code enforcement officer for Marlboro, stated, “I think Mr. Deeb has crossed a line somewhere. This is not what we would consider to be a customary home occupation.”

Allow me to translate Ms. Wilderman’s words into plain English: “Mr. Deeb hasn’t actually violated any law or regulation that I can find, but I don’t like what he’s doing because I’m ignorant and irrationally afraid of chemicals, so I’ll abuse my power to steal his property and shut him down.”

The sadly inevitable result of combining scientific ignorance with petty bureaucracy.

They will get my chemistry set when they pry it from my cold dead fingers.

Infodemics

The South Korean government has invented a new name; “Infodemics”, for an old concept: FUD. South Korea has recently been hit with a wave of FUD about mad Cow disease:

“We have to guard against ‘infodemics,’ in which inaccurate, false information is disseminated, prompting social unrest that spreads like an epidemic,” Lee told parliament early in July.

Lee has every reason to take it personally.

Barely had he taken office in February than he was accused of putting the nation’s health at risk by agreeing to import U.S. beef, long banned because of concerns over mad cow disease.

Much of the fear, at times hysteria, was fanned by blogs and discussion boards that crammed into South Korea’s Internet space. It helped trigger mass protests that daily clogged central Seoul in late spring and early summer as tens of thousands took to the streets to demand U.S. beef be kept from South Korean tables.

An early hot topic was a scientific study, heavily distorted in the retelling but widely believed judging by Internet postings, that Koreans had a genetic predisposition to catching the disease.

The government’s response is, predictably enough, to try to censor their corner of the internet:

The Justice Ministry is working on what it calls a Cyber Defamation Law.

“The reality is that we lack the means to effectively deal with harmful Internet messages,” a ministry official said.

The Korean Communications Commission, which regulates the industry, has come up with its own rules to oblige portals to suspend sites stepping outside the limits and force Websites to use real names of anyone posting comments.

The commission says the measures are designed to improve security and reduce the spread of false information.

But censorship is really the least effective approach to fighting FUD. Censoring the critics will just fuel the perception that the government has something to hide.

There are interesting parallels between the Mad Cow scare in South Korea and the vaccination-autism scare in the US. In the US the fear that vaccinations cause autism is still widespread even though the original preservative blamed for the effect, Thermasol, was phased out of use years ago with no effect on the reported rate of autism.

In both cases the solution to fighting the FUD is more information. In the US, parents need to see the effects these terrible diseases have on children where vaccinations are not in widespread use. They need to be shown that not vaccinating their children is the far riskier option.

In South Korea it would help to see images of healthy Koreans living in the US and dining on beef.

Here comes the sadly inevitable convergence of junk science and junk governance: Carbox:

Here’s something new to worry about: If you can’t figure out how much carbon your company is pumping into the atmosphere, you could face fines or even criminal charges someday.

They’re calling it Carbox, and it’s inspired a green streak in corporate culture–and spawned a cottage industry to deal with the problem. As most people now painfully know, Sarbanes-Oxley, or Sarbox, requires companies to disclose any business risks facing the company to investors in public filings.

And here is the quote that gives the whole game away:

“Companies like Google are adding hundreds if not thousands of servers a month to keep up with demand from all these Web 2.0 sites where you store your photos or music. Those are all powered by servers in data centers. The growth of those things is just incredible.” Expect the fees for consultants and lawyers to follow the same path.

What utter non-sense. So of course it’s going to happen. Sometimes I think it’s a miracle public companies stay in business, much less remain profitable.

Just a bit outside…

In honor of Earth Day, Walter Williams has some interesting past predictions that didn’t quite hit the strike zone:

At the first Earth Day celebration, in 1969, environmentalist Nigel Calder warned, “The threat of a new ice age must now stand alongside nuclear war as a likely source of wholesale death and misery for mankind.”

C.C. Wallen of the World Meteorological Organization said, “The cooling since 1940 has been large enough and consistent enough that it will not soon be reversed.”

In 1968, professor Paul Ehrlich, former Vice President Al Gore’s hero and mentor, predicted that there would be a major food shortage in the U.S. and “in the 1970s . . . hundreds of millions of people are going to starve to death.”

Ehrlich forecast that 65 million Americans would die of starvation between 1980 and 1989, and that by 1999 the U.S. population would have declined to 22.6 million.

Ehrlich’s predictions about England were gloomier: “If I were a gambler, I would take even money that England will not exist in the year 2000.”

In 1972, a report was written for the Club of Rome warning that the world would run out of gold by 1981, mercury and silver by 1985, tin by 1987 and petroleum, copper, lead and natural gas by 1992.

Gordon Taylor, in his 1970 book “The Doomsday Book,” said Americans were using 50% of the world’s resources and “by 2000 they (Americans) will, if permitted, be using all of them.”

In 1975, the Environmental Fund took out full-page ads warning, “The World as we know it will likely be ruined by the year 2000.”

Harvard biologist George Wald in 1970 warned, “Civilization will end within 15 or 30 years unless immediate action is taken against problems facing mankind.” That was the same year that Sen. Gaylord Nelson warned, in Look magazine, that by 1995 “somewhere between 75% and 85% of all the species of living animals will be extinct.”

Oh, so close…