The Physics Police

The Physics Police

Friday, April 25, 2014

The Electrolytes Plants Crave

Phosphate is a bad-ass little molecule. It plays the central role in plant and animal metabolism.

For example, plants use the sun's energy to stick a third phosphate onto ADP to form ATP, rightfully called the "molecular unit of currency". In animals, muscle contraction consumes a ton of ATP. All aerobic organisms, including humans, form ATP using chemical energy from caloric sources such as fat, protein, and sugar. Even anaerobic respiration, thought to happen in the most ancient bacteria, is just a different way to turn ADP into ATP by adding one more phosphate.

I would go so far as to define life on Earth as a very complex mechanism for making ATP by somehow gluing a phosphate molecule to the end of ADP!

Phosphate, the metabolism molecule.
Sodium phosphates are formed by sticking sodium atoms on those dangling oxygen atoms. When you have all three oxygen atoms paired up with sodium in this manner, it's called trisodium phosphate (TSP) which is used as a food additive (acidity regulator and emulsifier), cleaning agent, and was in the past an ingredient in some soaps and detergents.

That may sound like a scary chemical, but it's just the salt of phosphate, the metabolism molecule. Biologically, it's harmless. Table salt is more toxic than trisodium phosphate, presumably because it has higher molecular density of sodium!

In addition to having the electrolytes plants crave, TSP has been studied as a sports supplement.

TSP has the electrolytes algae crave, too. Prolific algal blooms can deplete the water of oxygen, killing fish and other animals. In an effort to reduce the risk of algal blooms, TSP was taken out of dish soap because it was thought the electrolytes might be causing too much algal growth by raising the biological supportive capacity.

People crave electrolytes, too. TSP is approved as a food additive by the EU, and is generally recognized as safe by just about everyone who passed High School biology.

Nick Brannigan and Vicky LePage of Health Conspiracy Radio seem to disagree. I'm not saying these two didn't pass High School biology, but such news wouldn't come as a big surprise.

They posted a man-on-the-street video shot on the Las Vegas strip where they hassled passers by about the (imaginary) dangers of this food additive.

This popular children's cereal also has an ingredient that is the main ingredient in degreasing paint, trisodium phosphate. We wanna know how many people know that this toxic chemical is in their favorite children's cereal... (0:08)

... it says "warning, harmful if swallowed." Does that look okay to eat? (1:57)
If you watch the video, you can see them liberally sprinkling crystalline TSP over a bowl of cereal. It's a white powder that resembles sugar. Mixed with water (i.e. when swallowed) high concentrations of TSP form an alkaline solution. Alkaline means high pH, whereas acidic means low pH. In other words, concentrated TSP can give you a chemical burn, not due to toxicity, but due to alkalinity.

I don't have to tell you that the concentrations of TSP found in cereal are small. Does cereal cause chemical burns? Does it bubble when you dump it into lemon juice? No, I didn't think so. The acidity of food is seldom of dietary concern. Lemons are highly acidic with a pH of 2.4, where a pH of 7 is neutral, and the pH of your typical TSP-based cleaning agent is 12.

Let's forgive the conflation of alkaline with toxic. The amount of TSP in cereal doesn't significantly change the pH of the food. Therefore, a tall glass of lemonade, being very acidic, poses a greater threat to your stomach lining than does TSP in cereal. Baking soda is also alkaline, with a pH of 9. Do you know what they use baking soda for...?

The alkalinity of TSP is an ironic complaint coming from Nick Brannigan who did an hour long show on the "alkaline diet" with some quack doctor! Aside from deceit, the only only explanation I can think of for Branniga's duel hatred and love for alkaline foods is that he doesn't know what alkaline means or how it matters to human health.

Anyway, here's the appeal to nature fallacy in all it's glory.
If you look on the ingredients in this, you can understand all the ingredients, you know what you're eating... It's a lot healthier for you, it's got no chemicals in it... These have all ingredients you can read... (2:36)
So long as airheads like Vicky LePage keep using the word "chemicals" as a synonym for "bad", I'm going to keep reminding people that everything is made of chemicals. Also, this idea that chemicals which you don't know how to pronounce are bad for you is one of the most blatantly ignorant things I've ever heard.
People have been asking us if we work for Nature's Path. We don't. (3:51)
No, but you work for NaturalNews, which is the worst anti-science website and supports Nature's Path because of their dedication to GMO labeling, all-organic ingredients.

Let's put on our Health Conspiracy glasses and take a closer look at these "healthier" ingredients in Nature's Path Leapin Lemurs Cereal:
Organic corn meal, organic whole grain corn meal, organic evaporated cane juice, organic peanut butter, organic molasses, organic cocoa, sea salt, organic soy oil, natural flavor, tocopherols. (Source)
All peanut butter, even certified organic, contains traces of aflatoxin, produced by the fungus Aspergillus flavus. It's LD50 (a measure of toxicity) is 1.2 mg/kg, which is 6,167 times more toxic than TSP!

Whether it's certified organic or not, molasses can contain sulfur dioxide, which according to NaturalNews is not so good for most human consumption. Even worse,
When fed in large amounts, and incorrectly, molasses may be toxic... The remedy is to immediately give them a solution that is rich in phosphorus and sodium. (Source)
You read that right. Molasses is toxic sludge, and trisodium phosphate is the only cure!

Did you know that caffeine is a natural pesticide? It's LD50 is 265 mg/kg, which is 30 times more toxic than TSP. Do you still want to eat that cereal which has organic cocoa that's loaded with toxic pesticides?

According to NaturalNews, soy oil, even certified organic soy oil, contains traces of hexane, a constituent of gasoline! Eww!

Even the cinnamon in Cinnamon Toast Crunch contains the chemical coumarin, which has an LD50 of 275mg/kg, which is 27 times more toxic than TSP. Coumarin have been used as rodenticides, too! Ever heard of Warfarin?

See how easy it is to play this trite little game? Notice also how many contradictions pop up once you decide to vilify something against all reason?

TSP is an extremely safe food additive. Health Conspiracy Radio is aptly named, because Nick Brannigan and Vicky LePage have conspired to mislead people about TSP using fear tactics and the appeal to nature fallacy.

Thursday, April 3, 2014

STAP In The Name Of Love

Back in January, Nature magazine published what is now an infamous paper claiming discovery of:
... a unique cellular reprogramming phenomenon, called stimulus-triggered acquisition of pluripotency (STAP) ... In STAP, strong external stimuli such as a transient low-pH stressor reprogrammed mammalian somatic cells, resulting in the generation of pluripotent cells.
If true, this would herald a revolution in stem cell research. Potential medical applications of a technique for transforming somatic cells into stem cells cannot be overstated. Sound too good to be true? Well, that's likely the case.

The paper, and in particular its lead author Haruko Obokata, have come under scrutiny due to alleged image manipulation and what has so far been a lack of reproducibility.

This week, Riken published the results of their internal investigation which found two instances of research misconduct by Obokata:
In manipulating the image data of two different gels and using data from two different experiments, Dr. Obokata acted in a manner that can by no means be permitted. This cannot be explained solely by her immaturity as a researcher.
... Dr. Obokata had used images in Paper 1 that very closely resembled images in her doctoral thesis. Yet the experimental criteria for the two papers were different ... this data was extremely important in showing the pluripotency of the STAP cells, and the actions taken by Dr. Obokata completely undermine the credibility of the data. There is no doubt that she was fully aware of this danger, and we therefore conclude that this was an act of research misconduct involving fabrication.
The report goes on to disclaim that verification of the STAP phenomena can only be done through scientific inquiry by third parties. This is true, but STAP is an extraordinary claim which, now that the paper's credibility is completely undermined, is supported by no credible evidence. I think Paul Knoepfler put it best:
There's still a chance that STAP is real, but if I were in Vegas or at the race track I'd put the odds in the single digits at this point. (Source)
A STAP cell begs Obokata-san to STAHP falsifying images.
One bizarre outcome of this fiasco has been a tide of allegations (by know-nothing Internet trolls) that the Riken investigation was motivated by sexism or other such prejudice.
My feeling is that this woman is taking the brunt of this because of her age and gender, and less because she (probably) needs work on her research skills ... From the very beginning of this whole thing they focused on her age and gender and what color her lab was rather than the science. (Source)
A panel of Riken males, who could have several motives for defaming this young woman, have ALLEGED that in their opinion she did something improper. (Source)
I think it is more that Japanese culture agains women. (Source)
This is ridiculous, because concerns over the images and results originally came from the worldwide community. True, the media, especially in Japan, showed a lack of professionalism by obsessing over age, gender, and what color her lab was. Lack of professionalism in science journalism should hardly surprise anyone, least of all those familiar with my blog.

Ironically, those know-nothings crying sexism are the ones guilty of prejudice. By assuming the Riken committee members are motivated by sexism they are buying into the stereotype of Japanese male chauvinism.

In reality, maintaining the institution's reputation is the obvious motivation for the investigation. The threat this paper poses to their reputation is due both to the extraordinary claims, and also the media circus. Recall that the latter is arguably due to some sexism, but on the part of the media who flocked to cover this story of a young female scientist.

I might also point out that panel of committee members is not all male. Bizarre conspiracy theories like this are only able to exist when rooted in poorly researched assumptions.

Misconduct aside, the thing I find the most fishy about STAP is the inconstant protocol. The original paper in the January edition of Nature laid out a protocol for creating STAP cells. Labs used this protocol, but failed to replicate the results. Early in March, Obokata published a more detailed protocol which seems to indicate that STAP cells are difficult to make. The new protocol also contains steps that look like after-the-fact manipulation and back-peddling.

Later in March, Charles Vacanti independently published a still-different protocol. Vacanti is co-author on the original paper, and namesake for that mouse with an ear growing on it's back. Despite his claims that this new protocol of his is able to create STAP cells easily and in just 2 days, no labs have yet claimed replication.