Can someone with a good knowledge of chemistry explain this to me?

February 21st, 2010

This is a product I found in my house:

Now, according to the back of the bottle, it contains “No Sodium Lauryl Sulphate”, which, as the product is marketed as a “natural body wash” made with “100% pure oils and certified organic herbs”, I’m assuming the manufacturers don’t like very much as a chemical.

However, it DOES contain this “Sodium Salt of Sulphonated Laureth2″ – a fancy way of saying Sodium Laureth Sulphate, a close chemical relative to the (supposedly) dreaded Sodium Lauryl Sulphate. But what’s the main differences between the two? Aren’t they practically exactly the same in terms of chemical and dermatological effect?

All the surface information I could find online (that wasn’t from woo-filled websites like this one) doesn’t put one as more dangerous than the other in terms of irritation ability and allergen status… Weird.

Are there any chemists that could shed some light on this situation? Or is this product just being misleading, capitalising on the public’s fear of one chemical, while replacing it with another that is practically the same? I wouldn’t be surprised if it were the latter.

Some quick thoughts on the idea of a skeptical “anti-ideology”

February 6th, 2010

This miniblog isn’t just for news, it’s also a place for me to share thoughts about something I’m thinking about currently. Usually something will come to me while I’m on Twitter, but 140 characters is extremely limiting, and I’m not about to put up half-baked ideas on the main blog, so the miniblog is the way to go, I think.

So, when I was visiting my grandmother today in hospital (she’s in for a knee infection, nothing too serious), the topic of childbirth came up via my mother talking about a friend of the family inducing their pregnancy early in order for her mother, who would be leaving the country before the baby was naturally due, to see the newborn child. My mother, who’s a higher-degree maternal and child health nurse, mentioned something along the lines of “People shouldn’t get it into their heads that inducing a pregnancy is a good thing to do – it will probably lead to a cesarean section, then trouble breastfeeding, which causes a whole lot of other problems later in life. People should learn to leave things like that to run their natural course.”

She, of course (she’s my mother what did you expect? :p), has data to back up what she’s saying – she’s looked at the peer-reviewed scientific evidence on these topics and has come to the conclusion that such a thing can have long-term harmful consequences to a child’s development. But – and here comes the point of this rant-esque post – would some skeptics have accepted her claims as she said them? I’m going to have explain this further…

Skepticism, as a large, popular and interconnected movement, is relatively new, and its rise has been strongly tied to the prevalence of the new media forms: podcasting, blogging, tweeting etc., in other words, things that use the Internet. Now, such popularity and ability to spread the message of critical thinking and the scientific method is obviously good for skepticism, bringing in new people all the time – but I fear, in my own paranoid little way, that the type of behaviour that is being promoted by these new communicative forms is not one that we should, as independent thinkers, be encouraging.

People have always been drawn to celebrities, and the rise of podcasting and blogging as skeptical media has thrust many popular providers of such content into what could be considered a kind of “skeptical celebrity scene”. People who I would place in this category include the cast of the Skeptic’s Guide to the Universe podcast, James Randi, Phil Plait, Richard Dawkins, PZ Myers, Brian Dunning, Richard Saunders, and many others. They each have huge (and vastly overlapping) “fanbases”, with people like Phil and PZ having the ability to literally change the outcome of large online polls or send thousands of people to a blog or website, simply by mentioning it on their own blogs. In this regard, they have enormous power.

But, clearly, this isn’t the only power they wield. Due to the sheer number of people who listen to what these people say every time they open their mouth and put out a podcast (or wiggle those fingers and publish a blog post), they also have a great deal of influence over what people in the skeptical movement think about various topics. If one of these people endorses some particular thing, lots of people are going to think that it’s great, and-

Yes, I hear you. I hear you shouting at the screen (in your minds though – you don’t want to wake the neighbours, I understand). I hear what you’re saying about skeptics being “freethinkers” and “not bound to particular ideologies”. I understand that. You’re right… in a limited sense, though.

Sure, the concept of “thinking for oneself” forms the basis of skepticism, and a healthy distrust of authority is what tears some people away from the uncritical, cult-like grottos of religion and pseudo-science, BUT (and the size of this “but” depends on many things) I’ve been thinking about this, and it seems to me, hypothetically, that the celebrity-like status of the various well-known skeptics combined with the mass new-media consumption of material by the members of the movement could lead to a kind of… “anti-ideology”. Yes, that’s right, a form of active reaction against a particular pseudo-scientific ideology.

The one that springs to mind easily, simply because it formed the basis of my (probably forgotten, by now) introductory story, is the reaction by the skeptical movement against the pseudo-scientific notion that things that are natural (eg. herbs, crystals, growing long hair, running barefoot, a lack of EMF etc.) are the best things for you. Skeptics, rightly so, point out that other natural things are harmful, like sharks and arsenic, so this thinking (called the naturalistic fallacy) is flawed. Great. All fine here. However, I fear that with the growth of easy-access podcasts about these topics and the soundbite-esque nature of gathering information on the Internet, that some, if not many, of the people listening to the podcasts where the naturalistic fallacy is mocked and refuted may come away with the idea that the natural course of action isn’t the best, in other words: it forms an “anti-ideology” against natural things.

Clearly this is a bit extreme. Nobody is going to think that everything natural is unsafe or unhealthy just because someone on the Internet said something “like” that (which could be taken out of the context and distorted). But that’s not really my point. Not all naturopaths think that all of Western medicine is rubbish – usually they’ll just want to promote their brand of pseudo-science as a “complimentary” therapy. The same could go for this “anti-ideology” against natural things. These people wouldn’t think that aspirin is bad because it has a natural source, but they could believe that the things that my mother said about inducing pregnancy and the dangers of not breastfeeding are not true, on a gut reaction, simply because they are natural. They would react against what they perceive as the naturalistic fallacy being employed, even though, in this case, it is not, and is actually backed up by peer-reviewed study.

Yes, yes, it seems like this could be a little unlikely, and that situations such as the one I described might not happen very often. But what about other examples? What if, hypothetically, a study came out that was completely peer-reviewed and valid, great sample size, triple-blind methodology, which showed that vaccinations were harmful, or at the least, ineffective? What would happen then? Of course, the skeptics that had medical knowledge might accept it, but what of the masses of people in the movement without that? With the constant barrage of arguments against the ideology of the anti-vaccinationists fresh in their minds, would they so quickly switch from vaccine-defense to vaccine-rejection?

Of course, in that example I assumed that the skeptics with medical knowledge and therefore the ability to set the record straight would not be able to do so, but the methods by which the “anti-ideology” of vaccine safety was originally spread could easily be used to switch the perceptions of the skeptical movement about the study from disbelief to informed acceptance (I’m looking at you, Steven Novella).

But what if some of the skeptical masses don’t accept the word of the experts anymore? What if they become so attached to their “anti-ideology” that they split from the mainstream? Some of you are laughing at this idea, but it’s something that has me at least a little bit worried. Communities on the Internet can quickly become insular – just look at the Australian Vaccination Network – not accepting criticism or dissenting viewpoints.

So, my main point here is that the skeptical celebrities that we hold up and adore so much need to push that message of thinking for yourself a lot more than they already do, and with that remind their audience that any ideology, whether it be original or reactionary, is a bad thing. I think a great example of someone actually doing this at the moment is Brian Dunning, who has the podcast Skeptoid. Brian stresses in his podcast that he shouldn’t be held up as the pinnacle of knowledge, and often makes sure to balance everything with the relevant facts and shows where the “anti-ideology” could lead if it were followed through with (I’m not sure if he does this on purpose, but it doesn’t matter – the important thing is that he does it).

I’d love to see more skeptical podcasts and blogs remember to think about going over the critical thinking tenants of skepticism every once in a while, just to remind their audience to always go where the evidence leads, not where their hearts, who may have picked up an intellectual bias, tell them to.

(As a side note, it’d also be good for these high-profile skeptics to fact-check as much as possible and tell people when they’ve made mistakes – because their errors can carry into the collective knowledge of the skeptical movement. I guess that’s true of any popular person, but it’s especially necessary in skepticism – we like to have beliefs that are correct and justifiable.)

Excellent comment on the “Tetrapod Tracks” issue from The Panda’s Thumb

January 10th, 2010

I think this comment on “Casey Luskin embarrasses himself again” on The Panda’s Thumb blog perfectly summarises the entire tetrapod-tracks-20-million-years-before-Tiktaalik-disproves-evolution argument that the Discovery Institute has recently been pushing around:

Leszek wrote:

So basically the “great minds” of creationism have come up with the argument:

If tetrapods evolved from Tiktaalik, why are there still tiktaaliks around [10 million years later]?

It seems to me I have heard this before somewhere.…

Oh Leszek, how very, very true that is. *chortle*

More evidence against a “metabolism first” origin of life

January 9th, 2010

New research by Universitat Autònoma de Barcelona, published in the Proceedings of National Academy of Sciences, has revealed problems with origin of life hypotheses that are based on metabolic systems developing first, as opposed to an RNA or DNA system. 

The researchers found that compound genomes, or “composomes”, the basic unit of proto-life in metabolism-based hypotheses, are unable to undergo Darwinian evolution, putting serious doubt onto thoughts that they could foster the beginning of life on planet Earth.

However, this is just one study – more research needs to be done to confirm or deny these results.

Eight percent of the human genome is bornaviral in nature

January 9th, 2010

Bornaviruses, a type of RNA virus that replicates inside the nucleus of host cells, has been found to be responsible for up to eight percent of the content of the human genome. Through endogenization, the virus’s DNA, retrotransposed from the RNA genome, has been integrated with our chromosomes over evolutionary time. Once the viral sequences are in the genome, they can be inherited through reproduction like any other part of the genome.

Due to the nature of bornavirus infections – they only infect neurons, the cells that comprise brain tissue – researchers have hypothesised that bornavirus genome integration could be the source of psychiatric disorders such as schizophrenia. A fascinating idea, but one that will have to be backed up with solid evidence in the future.

Even killer whales cannot escape the pull of evolution

January 7th, 2010

Two kinds of killer whale have been found in UK waters, prompting evolutionary biologists to posit that the species of dolphin may be undergoing a speciation event.

The differences are fairly obvious – one kind, dubbed Type 1 had significant adult tooth wear, showing that they feed primarily by sucking up fish into their mouths, while Type 2 showed no wear at all. Type 2, on the other hand, seem to prey on other dolphins and small whales. Type 2 males also seem to be up to two meters larger than Type 1 males.

Evolution in action – an amazing thing.

Prions capable of evolution

January 1st, 2010

Prions, the proteins responsible for various diseases including bovine spongiform encephalopathy (aka. mad-cow disease), have been found to able to evolve via mutation and natural selection just like traditional life-forms.

Even though by most measures prions are not living organisms – they are proteins with no genetic material – the Scripps Research Institute has found they can adapt to their environment and become more dangerous over time.

Charles Weissmann, the head of the study, had this to say:

“On the face of it, you have exactly the same process of mutation and adaptive change in prions as you see in viruses. This means that this pattern of Darwinian evolution appears to be universally active. In viruses, mutation is linked to changes in nucleic acid sequence that leads to resistance. Now, this adaptability has moved one level down- to prions and protein folding – and it’s clear that you do not need nucleic acid (DNA or RNA) for the process of evolution.”

Very interesting. It’ll be fun to see what creationists and intelligent design proponents such as the Discovery Institute have to say about this find.

(via BBC News) – (h/t to @dreadpiratemick on Twitter)

James Randi hijacked by AGW “skeptics”

December 19th, 2009

You might be familiar with James Randi, the grandfather of the organised skeptical movement we see today, and his recent blog post about anthropogenic global warming (or AGW), which was rather critical of the mainstream scientific opinion. It caused quite a stir on the Internet, as you would expect it would, so much so that he felt compelled to clarify his statement in another blog post.

As various people, myself included, predicted on Twitter, the AGW denialist crowd were quick to capitalise on a leading “legitimate skeptic” sympathising with their position, starting with James Delingpole over at the Telegraph. He accuses Randi’s pro-AGW followers of being “Warmist thugs” and “eco-facists”, and backs up the claim with these comments left on Randi’s blog post:

“It would be hard to imagine Randi siding with one of the many similar petition projects against evolution instead of accepting the consensus of biologists.”

Err, that’s an excellent point.

“What disturbs me is the phrase, “Warming will not be disastrous”. Tell that to the millions in Pakistan, India, and South America whose river sources will die with the glaciers from which they spring. Tell that to the thousands of parents whose children will die of malaria, dengue fever, and the other tropical scourges whose ranges are increasing as the climate warms.”

Facists, the lot of them!

“Objections to Randi’s position have been duly noted here and elsewhere, and they are not new — and neither is Randi’s cynicism disguised as skepticism. The logical fallacies are numerous in his post, and easy to identify, should someone wish to play a game of AWG-denial Bingo.”

Watch where you’re swinging that trident, you common thug!

Come on. Seriously.

The evolution of koalas revealed

December 19th, 2009

Continuing on with the “fossil skull revealing new insights into X’s evolution” line of news stories, skulls of two koala ancestors, Litokoala and Nimiokoala, have been analysed by Dr. Julien Louys from the University of New South Wales.

The analysis revealed that the mastication (chewing) apparatus of modern koalas, who subsist on a diet solely comprised of eucalyptus leaves, is much more specialised than the same apparatus in the ancestral species when compared with the distinction between the middle ears of both modern and ancestral koalas – in other words, there was more difference between the chewing mechanisms than the middle ears, suggesting that they evolved separately at different times.

You gotta love those Australian animals.

Fossil of seacow ancestor discovered

December 18th, 2009

The skull of an ancestor of the modern-day seacow, which lived 48.6-372 million years ago, has been discovered in Madagascar. The location of the discovery may be a new fossil bed, one which may help unlock some of the evolutionary history of the country.

Professor Karen Samonds, the scientist who unearthed the find:

“The fossils of this ancient sea cow are unique in that it has a full set of relatively unspecialized teeth whereas modern sea cows have a reduced dentition specialized for eating sea grass, and most fossil species already show some degree of reduction. It may also be the first fully aquatic sea cow; confirmation will depend on recovering more of the skeleton, especially its limbs.”