Monday, December 31, 2007
Have discovered lots of exciting things in the murky old swamps of history, for details click here. In particular, I was surprised how mobile people were in that time (mostly against their wishes, I suspect!) A year ago I thought that all my ancestors were German, and now I have a dozen people from Italy, Switzerland, and France on my records. A nice 1595 picture of two suspected swiss relatives is here. Unfortunately, these two haven't let me enter their website yet, am awaiting response to find out if and how they are related ...
Anyways, I've updated the website, hoping it will work for me while I'm busy with science writing and all that.
happy new year to all !
Sunday, December 30, 2007
Men want us lobotomised
In speed dating I did a lot better as a simpering, giggly florist than as a dazzlingly literate lawyer
Saturday December 29, 2007
As you can see from the 321 responses, it must have hit a sensitive spot. (many are from offended blokes!)
I largely agree with the sentiment expressed in the piece, and have observed this kind of dumbing down myself on occasions.
The fundamental flaw in this "investigation" is, however, that sensible men who appreciate women in the bright-to-brilliant range of the spectrum will most definitely never ever attend a speed dating session. Or any other kind of meat market. So if the author really wants a man to discuss Heidegger with (which I somehow doubt) she should drop by the nearest university's philosophy department rather than any seedy bars.
Saturday, December 29, 2007
The projects, some of which I have covered in my articles, range from archaeology to biology and conservation. They are based on 6 continents and offer all kinds of excitement from scuba-diving through to mountain hiking. There are 10 new projects, including one studying biodiversity in the vineyards of the Bordeaux region. I'm sure participants will get to study the products of those vineyards as well.
You can order a copy of the guide from the Earthwatch office closest to you (UK, US, Australia or Japan) which you can find via the central Earthwatch website.
Friday, December 28, 2007
Many pathogenic bacteria, e.g. those that cause infections of the urinary tract, have very thin "hairs" allowing them to stick to cells of their host. Thanks to these hairs, bacteria can invade the urinary tract and avoid being flushed out with the urine. These are known as pili, and their protein subunits are stuck together like lego bricks, i.e. one end has a binding pocket, and the other has a spare bit of protein chain that fits in there, and contributes one strand to the beta-sheet fold.
Before they get assembled into this pile of lego bricks, the subunits are bound to molecular chaperones in the periplasm, which use the same binding mechanism. So how does the subunit get handed over from the chaperone to the neighbouring chaperone? Emanuele Paci and co-workers at Leeds and Gabriel Waksman's group at Birkbeck college London have now presented molecular dynamics simulation that support the so called zip-in zip-out mechanism, which involves one beta sheet opening up like a zip, and the other starting to zip up in a coordinated fashion. Which is just beautiful molecular ballet.
But it is also useful, as potential drugs that can stop pili from growing may soon become an attractive alternative to antibiotics. As they disarm bacteria rather than killing them, the hope is that they will not favour the evolution of resistant strains quite as much as antibiotics do, plus they give the immune system a better chance to train its forces against the bacteria.
The paper comes out in Journal of Molecular Biology, and with luck you may be able to read it via
I've also written a full-length feature on this topic in German, which is due to appear in February.
Thursday, December 27, 2007
But all her looks were too sad ...
... well not really.
But if you want to check whether you're related to Grace Kelly, you can do it here.
I am, as I just found out. Our common ancestor is her no. 1822., Leonhard Treusch. Wonder what he looked like :)
PS (2019): I had no luck with the (100% German) ancestry of Doris Day (real name: Doris Mary Ann Kappelhoff) though. Update 2021: link wasn't working any more, I put in a different one that works. More about my relevant ancestors here.
Wednesday, December 26, 2007
The explanation is I spent a few hours googling some of my "orphaned" ancestors, i.e. those whose parents I don't know, I found some possible links, sent a grand total of 2 emails to check, and bingo, by the end of the day I had confirmation that I now have 20 people more ... plus a couple of new living (though rather distant) relatives.
One of them has a really nice website. Our most recent common ancestors are his no. 64 and 65. Hey, that's only 6 generations away.
Tuesday, December 25, 2007
The title translates to white robe, but I'll need a dictionary and a lot of time to work out what the lyrics mean. The video is intriguing and stylish, as most of theirs are. They remind me of European cinema (Kieslowski etc.) more than of US/UK music videos. See, for instance: 30 minutes, all about us, not gonna get us -- all available on t.A.T.u.'s MySpace.
PS -- those were the days:
Monday, December 24, 2007
Apparently, the last time a passenger train ran on Christmas day in this country was in 1964. Why? People seem to be forgetting that not all of us believe in Santa Claus. There are lots of muslims, jews, and atheists living in this country who might want to go somewhere on Tue Dec. 25th. If they started trains again, I'd use them just for the heck of it. (A few years ago I had to see a dentist on xmas day, and was really happy with the experience -- happy to see that at least one person was doing something useful, while the rest of the country was stuffing themselves.)
But as things are going rather the other way, we can look forward to a future where there are no trains on Sundays either.
Sunday, December 23, 2007
So over the holiday season I'll be busy updating the 120-pages tome that is our official family history, and the website which presents some extracts from that. To begin with, I have added some of the new family members to the list of last known ancestors. By and by, I will also edit / add to the other pages. Watch this space.
Saturday, December 22, 2007
They don't mention what he died of, though. Nor which factors limit the survival times.
Friday, December 21, 2007
The nine new members of the passport-less travel zone are: Poland, Czech Republic, Slovakia, Hungary, Latvia, Lithuania, Estonia and Slovenia, and Malta.
It's not quite the end of pass port control in Europe, though. We can travel from Talinn to Porto without a passport, but still not from Dover to Calais.
There is still no word on whether the UK will ever join the Schengen land, or indeed the Euro, or any other significant EU activity. I think British governments (and their puppet masters in the tabloid press) are content with their role of operating the brakes on anything European.
Thursday, December 20, 2007
Favourite lines include:
Do one thing every day that scares you.
[although I only do that about once a year!]
Don't feel guilty if you don't know what you want to do with your life. The most interesting people I know didn't know at 22 what they wanted to do with their lives. Some of the most interesting 40-year-olds I know still don't.
I didn't know anything about the history of this recording though. Only this week I found out that the thing has its own Wikipedia entry where the whole back story is explained. Fascinating stuff. I'll put that on my "I wish I'd written list", right next to Cien an~os de soledad and 99 Luftballons :)
Wednesday, December 19, 2007
PS I don't include the books in the stats, but they too get cited every once in a while.
Tuesday, December 18, 2007
Initially, I really liked the idea of running the CO2 in closed cycles, and I was also impressed by the work the Norwegian gas companies do to minimise the CO2 released from their gas production. But the rest of the field left me rather disillusioned, as it turned out to be championed by all those dinosaurs who would like to carry on burning fossil fuels regardless. I mean, anything that the OPEC and the US government agree on can't be right, can it?
Sunday, December 16, 2007
Saturday, December 15, 2007
1) Fetal load and the evolution of lumbar lordosis in bipedal hominins
clear as mud ? If you haven't figured out what it means, try the Guardian's version:
2) How women keep upright while pregnant
Friday, December 14, 2007
overview by Harriet Coles
101 ways to save the Earth -- and other books reviewed by Tom Standage and Ella (7 1/2)
Hawking for kids
... well, there's lots more, see for yourself. The web pages carry a label saying that you'd have to pay for full text access, but as far as I can see, the pages linked to above do give the full text for free.
Thursday, December 13, 2007
The web portal also provides access to educational resources where you (teachers, students, pupils, anybody, really) can have a play with the computer programs.
Wednesday, December 12, 2007
On page 26 of the current issue of Chemistry + Industry, you'll find my take on:
* genomes ranging from those of Watson and Venter through to the grapevine;
* chemistry in outer space;
* winding back the development clock;
* ... and immortality, of course.
Also, in the same issue, a book review of the tome: Nanoscopic Materials -- size-dependent phenomena. Enjoy!
Tuesday, December 11, 2007
Researchers from Nijmegen in the Netherlands and Naples, found Acidomethylosilex fumarolicum in hot, acidic volcano mudpots in Italy. This bacterium can thrive in extremely acidic conditions, down to pH 0.8, and its preferred temperature is around 55 deg. C. Surprisingly, it is unrelated to any of the known methanotrophic bacteria, which are all found in one of two large phylogenetics groups, the alpha and the gamma proteobacteria. A. fumarolicum appears to belong to the phylum verrucomicrobia, only very distantly related to proteobacteria. The microbe hunters tracked it down by looking for a key enzyme of methane metabolism, methane mono-oxygenase. Eventually they found three copies of the corresponding gene in A. fumarolicum, but they were quite different from the ones in known methane eaters, explaining why the extreme bug hasn’t been found before.
Conversely, microbiologists from New Zealand, Hawaii, and China, using samples from a geothermal area known as Hell’s Gate in New Zealand, cultivated a microbial strain first, which they baptised Methylokorus infernorum, and which can metabolise methane at pH as low as 1.5. Being unable to identify the methane mono-oxygenase enzyme in this species, they went on to sequence its genome (as you do, these days) and found three copies, again. Like A. fumarolicum, this new methane eater is classified off the beaten track of methanotrophs, in the phylum of Verrucomicrobia.
Now that we know what acid-loving methane eaters look like (genetically speaking), there may be many more new species to follow. The Dutch group has already looked at unrelated samples from Yellowstone National Park (US) and found evidence that similar extremophiles live there, as well. Although they have failed to be discovered for decades, these bugs may in fact be widespread.
A. Pol et al., Nature 2007, 450, 874.
P. F. Dunfield et al., Nature 2007, 450, 879.
Life on the Edge: Amazing creatures thriving in extreme environments
Astrobiology: a brief introduction
NB: This story is a blog-exclusive one. From now on, I'll label such stories with the tag "sciencenews", while those published elsewhere have the tag "sciencejournalism".
Sunday, December 09, 2007
Let's try it out:
PS woo-hoo, it works ! now I'll see whether I can do that in myspace too :)
Way back in the early 80s, when Ronald Reagan kindly offered to station lots of Pershing II missiles in Germany, and we were involved in the movement trying to stop that from happening, we used to joke that the general John Joseph Pershing after whom the missiles were named, might be a relative of mine, as my great-grandmother was born Pfersching.
Now I've had a closer look at this, and while I can't quite prove it, the possibility appears to be quite real. The general, like most of the thousands of Pershings in America, is a descendant of Frederick Pershing (1724-1794), born Friedrich Pfersching in Alsace, who sailed from Amsterdam to Pennsylvania on the ship "Jacob" in 1749. While there is lots of information on the lives of Frederick and his descendants, I have found nothing whatsoever on his ancestors. Except that family traditions say they were French Huguenots (as the name Pfershing is definitely German, this tradition may refer to maternal lines?!)
My eponymous ancestor in that generation is Johann Leonhard Pfersching, who married Margaretha NN in Flehingen, Baden (just across the Rhine from Alsace!) in 1759. His father Johannes Pfersching was a cartwright, but I have no further information about him.
So beyond the name and geographic proximity, evidence for any link remains to be found ...
Update 2022: many years later I discovered in my possessions a French postage stamp showing General Pershing:
Friday, December 07, 2007
But this is a long story, and an intriguing one (at least for people interested in protein biochemistry). I spent much of this week researching, writing, rewriting etc. the news item which is based on a paper in Nature Structural Biology, this press release, and communications with five different experts in the relevant fields. Essentially, the researchers found that heme (or haem), the cofactor in haemoglobin and other important proteins, binds to the receptors REV-ERBalpha and REV-ERBbeta, which were known to influence circadian rhythm, but were "orphan" receptors, meaning that nobody knows which hormone controls them.
In the paper, the researchers just report that heme binds the receptors, suggesting it may have a signalling role linking metabolism and the biological clock. No objections so far. In the significantly sexed-up press release, however, heme is referred to as a "hormone" and all kinds of wonderful medical applications are promised. The trouble is, hormones normally travel around and convey information from one cell type to another, and there is no evidence of heme doing that. This aspect is discussed in detail in my news piece.
After the piece was finished I hit on another fly in the ointment. I found out that there are two crystal structures of the REV-ERBbeta ligand binding domain in the Protein Data Bank, which the authors of the NSB paper hadn't mentioned to me. According to the crystallographers, these structures include the hormone binding site. Now the authors of the heme paper say that the crystal structures don't include the heme binding site which they confirmed by mutagenesis.
So if heme binds in a place that is distant from the hormone binding site, to me that says loud and clear that heme is not the hormone that regulates REV-ERBbeta. If anything, it is a co-regulator, and the receptors are still semi-orphaned.
Oh, and the claim for medical applications isn't much better. I wouldn't want to take a drug that competes for heme binding sites. I guess the take-home lesson is never to trust a press release ...
PS, the whole heme story reminded me of a classic Irving Geis illustration, where heme is shown as the light source illuminating the protein cytochrome c from within. The picture is shown here as Fig. 2.
Thursday, December 06, 2007
The most prominent member of our club right now is Philip Pullman, of course. The new movie "The Golden Compass" is based on his book "Northern Lights", and interviews with him are currently practically everywhere.
Wednesday, December 05, 2007
Nachrichten aus der Chemie 55, Nr 12, 1185
Kreativität und Selbsterneuerung
Spektrum der Wissenschaft Nr 12, 20-22
K.o.-sieg für Mäuse und Menschen
Also, a reminder that my German blog on the WissensLogs site is here:
Tuesday, December 04, 2007
Now, scientists in Korea have developed a way of multiplying the capacity of flash memory devices, using stacked layers of nanoparticles. Read my story
The story also gave me a chance to catch up with the fast-moving technology/magic boundary and to understand (for a fleeting moment) what a flash memory is and how it works. Don't ask me now, though, the moment has passed and I have a new story to write up.
Monday, December 03, 2007
I can get quite furious about certain parts of the media that want us to believe that drugs (e.g. cannabis) cause mental illness (e.g.schizophrenia), when there is absolutely no evidence at all that the observed statistical link is causal in this direction. There are at least two other interpretations of the same data, namely
1) that an as yet undiagnosed, early stage mental illness makes people more likely to try and enjoy mind-altering drugs, and
2) that both the mental illness and the drug addiction are consequences of the same or similar neural disorders.
A paper in Behavioral Neuroscience, published by the American
Psychological Association (APA), now presents evidence that -- at least in rats -- damage to the amygdala has effects that support explanation no. 2.
Wouldn't it be nice if this could put an end to the headlines screaming that drug X "causes" mental disease Y ? Sadly, I guess that this will be largely ignored by the press. (I proposed a news item on this but was turned down!)
Saturday, December 01, 2007
Yesterday I popped round to the office to talk to Mark Huxham about his mangrove studies in Kenya and in Sri Lanka. See whether I can get a story out of that, too.
PS I forgot to mention that mangroves are a nice example of life under extreme conditions (high salt concentrations in tidal swamps) that I was unaware of when I wrote Life on the Edge. One day I'll need to write a sequel to that, to incorporate all the things I've learned since it appeared. "Life on the Edge and Beyond" would be a catchy title for that ....