Friday, May 23, 2008

submit your post for the Molecular & Cell Biology Carnival #3

That's right, the time is coming close again, and all submissions should be in by June 7 using this form. We already have a host for this edition - Bertalan over at ScienceRoll will be your host, and I am very happy that he is taking on the MCB Carnival for the upcoming edition.

If you are interested in hosting the next edition (July 13), shoot me an e-mail at the address in the sidebar, or leave a comment. You can find out more about the Carnival, how to host it, and how to get a button to put on your site at the official MCB Carnival website. You can also check the official website to find links to all previous editions of the Carnival.

So get this science thing going: send a post to Bertalan using that form and/or spread the good news - there is new science carnival in the blogosphere, and it wants you!

If the form does not work for you, just e-mail me and I will forward your submission to our host.

See you over the week-end with some peer-reviewed blog goodness!

P.S. Lest I forget: the latest edition of the Skeptics' Circle is up - in limericks.

View blog reactions

Read More...

Thursday, May 22, 2008

readings, readers and blogrolling

First of all, I would like to welcome the new readers of the skeptical alchemist. Maybe you aren't necessarily new, but you sure added my feed to your reader/bookmarks, because today this blog register the highest number of subscribers since its start. I can't believe that there are 82 people out there reading my ramblings. Amazing.

In case you are totally new around here, there are a few good posts you can read - you can see them in the sidebar under the heading "the BEST of". These are some of the best/most searched posts on the blog, organized by topic.

Last but not least, you could also pay a visit to blogs in my blogroll, and to these new additions:

Sandwalk
Scienceroll
Eye on DNA

I hope you will enjoy your time spent reading the ramblings of the skeptical alchemist.

View blog reactions

Read More...

Wednesday, May 21, 2008

first-class healthcare for developing countries? it is possible

Did you know that the heaviest burden for cardiovascular disease is carried by Africans and African countries? Did you know that cardiovascular disease is going to be the next medical emergency in Africa and other developing countries, following AIDS and malaria? And worst of all, did you know that bringing first-class health care to poor country (and poor citizens) is possible, and can even generate profit?

All it takes is the will to change things, and a keen mind. Two things that Dr. Ernest Madu definitely has. If you think that realizing all of this is impossible and unrealistic, I will leave it to him to change your mind - with the facts.



[You might not be able to see this video in your feed. If that is the case, please click here.]

View blog reactions

Read More...

Tuesday, May 20, 2008

around the blogs

This is a mesh of interesting science-related news gathered from blog and traditional media. But I would not know most of these things if it weren't for my blogging addiction.

Alex Palazzo informs us that there is a new networking tool out there for the scientist 2.0 (something tells us that generations X and Y will be all over this). The tool is called SciLink, and it can be described as a version of LinkedIn for scientists and people in academic careers. Apparently it is not completely bug-proof, but it might be worth checking it out.

An old piece of DNA has been resuscitated. This does not qualify as a revival or remake of Jurassic Park, but it shows that ancient DNA can sometimes be rescued and even studied in vivo, granted that you had some samples preserved in decent conditions. Some century-old Tasmanian tiger pouch young and a team of Australian scientists need to be credited for this achievement.

But fear not, the Tasmanian tiger (just like mammoths and T Rex before it) will not be resuscitated any time soon. And you should not fear dead bodies either - at least, when it comes to natural disasters. Did you know that dead bodies do not cause disease epidemics? If you are unconvinced, pay a visit to Effect Measure.

Talking about old, but not dead, the old prejudices and ideologies linked to creationism are so hard to defeat that, it turns out, about 16% of American science teachers might actually subscribe to creationist views. As the authors of the study, reviewed over at The Lay Scientist point out,


Scientists concerned about the quality of evolution instruction might have a bigger impact in the classroom by focusing on the certification standards for high school biology teachers. Our study suggests that requiring all teachers to complete a course in evolutionary biology would have a substantial impact on the emphasis on evolution and its centrality in high school biology courses.


And to conclude, have you checked your tissue culture? It might be infected with Mycoplasma hominis. So make sure you always wash your hands after you go to the washroom or after you do...whatever it is you have done!


View blog reactions

Read More...

Sunday, May 18, 2008

Molecular and Cell Biology Carnival #2 is up!

The Molecular and Cell Biology Carnival #2 has landed over at cotch.net! There is quite an assortment of science posts for the hardcore science blogging lovers.

If you are interested in hosting the next Carnival, or you simply want to submit a post, write to me (address in the sidebar) or leave a comment on this post.

The next edition will be taking place on the second Sunday of June (June 8).The submission deadline is on June 7. You also have the option of sending posts through blogcarnival.com using this form.

Thank you to the host, and to all of those who have submitted articles for this second edition.



View blog reactions

Read More...

Thursday, May 15, 2008

finally an excuse for my sweet tooth!

ResearchBlogging.org

Finally I can blame this (supposedly, as I have not got my genome sequenced) on a genetic variant of the glucose transporter GLUT2. Yes, it does remind you of gluttony.

A glucose transporter is a channel that allows cells to import glucose, and apparently the variant of GLUT2 you possess will affect your intake of sugary foods and drinks. Or, at least, there is a positive correlation between possession of one variant and increased consumption of sugary foods. The study documenting this was published in Physiological Genomics.

The study looked at two cohorts of patients: older obese people, and young lean people. They then compared sugar consumption, as well as protein consumption, within the two groups, according to the GLUT2 variants. In this way, they found that age and sex seem not to affect sugar consumption, but a GLUT2 variant significantly correlated with increased "sweet toothedness".

These were the main finding of this study:


  • those individuals with the GLUT2 variation consistently consumed more sugars (sucrose (table sugar)), fructose (simple sugar such as corn syrup) and glucose (carbohydrates), regardless of age or sex.
  • the two sets of food records from the older group showed that the older individuals with the variation consumed more sugars than their non-variant older counterparts (112± 9 vs. 86±4 grams of sugar per day and 111±8 vs. 82± 4 grams per day).
  • the individuals in the younger population who carried the variant were found to consume more sweetened beverages (0.49±0.05 vs. 0.34±0.02 servings per day) and more sweets (1.45±0.10 vs. 1.08±0.05 servings per day) than their non-variant counterparts.
  • there were no differences in the amount of protein, fat, starch or alcohol that was consumed by those either with or without the variant.


What I find very interesting, and suggests to me that the study might be onto something, is that people with the "sweet channel" variant consumed more sugar regardless of sex and age. This still does not imply causation, but it definitely seems to suggest that there is a link.

Now, I would be interested in knowing whether people who consume more sugars also express higher levels of GLUT2 in general (regardless of the variant). You would expect that to be the case, as all this sugar has to be taken out of the circulation.

This seems to be a case of predisposition. But don't start being gluttonous now and blame it all on GLUT2.

Sources

American Physiological Society (2008, May 14). Genetic Variation Linked To Preference Sugary Food. ScienceDaily. Retrieved May 15, 2008, from http://www.sciencedaily.com­ /releases/2008/05/080514064928.htm

Eny, K.M., Wolever, T.M., Fontaine-Bisson, B., El-Sohemy, A. (2008). Genetic variant in the glucose transporter type 2 is associated with higher intakes of sugars in two distinct populations. Physiological Genomics, 33(3), 355-360. DOI: 10.1152/physiolgenomics.00148.2007

P.S.: We had problem with the MCB Carnival, as the next host could not log in to BlogCarnival. If you are still interested in being included, and you have not submitted your post yet, you can contact him directly at his e-mail address, or you can just send it in to me. We will have the Carnival up soon!


View blog reactions

Read More...

Tuesday, May 13, 2008

cyclone Nargis: do we let them stand alone?

If you are a fan of the Lord of the Rings, you might just remember that moment when you see the Elves arriving at Helm's Deep, at a time when the Rohirrim thought that nobody would ever come to help in the fight against Saruman. I remember well, because so many things happen in this world when that moment comes again and again, and nobody ever decides not to let people in need stand alone. Rwanda and Darfur come to mind. Man-made wars.

But now, here comes this case. This case is, in most people's minds, so unequivocal, that our inability to react to it will be perceived by most as deeply unethical. Here comes a time when, struck by the force of nature, a government fails an entire nation...and we stand here to watch and pontificate on whether it would be legal for the UN to send troops to Myanmar. Too bad we know exactly why Russia and China voted against a UN resolution in favour of stronger UN intervention in Myanmar (two words: Tibet and Chechnya).


Burma continues to reject help

Burma's military rulers still oppose foreign aid workers helping the many thousands left destitute and in danger of disease by Cyclone Nargis.

Vice-Admiral Soe Thein said Burma was grateful for an aid shipment from the US, which arrived on Monday, but said there was no need for aid workers.

The UN has warned of the risk of a "second catastrophe" unless a massive aid operation is put in place rapidly.

The organisation is calling for a "transport corridor" to be set up.

The UN's humanitarian chief, Elisabeth Byrs, reiterated the international community's exasperation with Burma's ruling junta.

"We are only seeing the peak of the iceberg, and the situation risks becoming a lot more dramatic if there isn't an acceleration of humanitarian aid," she told journalists in the Swiss city of Geneva.

'Haphazard' delivery

The official death toll from Cyclone Nargis is approaching 32,000 - but observers fear the final count will be much higher.

Ms Byrs said 55,000 tonnes of rice would be needed to feed the 750,000 people estimated to be in danger for three months. Half of the rice would need to be imported.

So far, she said, the World Food Programme had been able to send only 361 tonnes of food aid - and distribute just 175 tonnes.

Emergency help has been held up by Burma's rulers, who have accepted the aid but refused to allow experts from overseas to co-ordinate its delivery.

Aid agencies say much of the food and equipment arriving in the country is not getting to those who need it because the junta does not have the organisation to transport it.

A BBC correspondent inside Burma says aid delivery is haphazard and private citizens have begun to distribute water and cakes from the backs of their cars rather than waiting for the soldiers to help.

French news agency AFP reported that the military had imposed a curfew in some of the worst-affected areas in the Irrawaddy Delta region over fears that rice rations would be stolen.

"You can't go out after 7pm because the soldiers will shoot," a 60-year-old man from the village of Pyin Ka Yaing told an AFP reporter there.

Apparently, it can also take about 3 hours for a European national on Burmese ground to get a tourist visa, but if you happen to be a relief worker, you will simply not be allowed in.

I guess this is what the ruling junta wants, ahead of the upcoming constitutional referendum which could keep them in power for a very long time still. Which makes me wonder whether the area struck by the cyclone would have voted, before the events, against or in favor of the junta remaining in power.

Never underestimate a bureaucracy's instinct for self-preservation.

View blog reactions

Read More...