Divided by language, united by gut bacteria – people have three common gut types | Discover Magazine

“Enterotypes aren’t quite as well-defined as, say, blood groups, but they could have similar uses as medical markers. The microbiome helps us to digest our food and it affects our susceptibility to diseases; the enterotypes could reflect these roles. Each enterotype was dominated by a specific genus of bacteria, and varied in the proportions of the other members. They produce energy in subtly different ways, they’re particularly efficient at breaking down different nutrients, and they specialise at creating different vitamins.”

This article reports on findings that there are “enterotypes”. While I have been seeing slightly different findings from others, this just goes to show that we keep finding out new things about our bacteria.

One other thing: at the end of this article is a very interesting slide show with snippets of other interesting findings related to our microbiome. Do flip through it.

[via @changeist]

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Language May Have Helped Early Humans Spread Out of Africa – ScienceNOW

“The story of humanity’s prehistoric expansion across the planet is recorded in our genes. And, apparently, the story of the spread of language is hidden in the sounds of our words. That’s the finding of a new study, which concludes that both people and languages spread out from an African homeland by a similar process—and that language may have been the cultural innovation that fueled our ancestors’ momentous migrations.”

Interesting technique and interesting findings.

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ScienceShot: Green Eggs and Salamanders – ScienceNOW

“This is the first case of an algae living symbiotically within a vertebrate, the team reports online today in the Proceedings of National Academy of Sciences. How the photosynthesizing algae gets there, and how it survives inside the tissues and cells of this predominantly nocturnal amphibian is still baffling to scientists.”

This is one cool report. Folks seem to have this idea of the inviolate cell, but then we see examples like this – not only do the algae and salamander hang out together, but in the end, the algae becomes part of the salamander. Does this salamander (or the algae) have a regulatory mechanism to foster this mutualism? Or is this random and the algae and animal just tolerate it? I’m placing my bet on a mechanism, though not sure if it’s the algae or the salamander controlling this.

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Book: The Windup Girl, by Paolo Bacigalupi

This is one great book. It’s set a few hundred years in the future, long after the oil-fueled “Exapansion” (that would be the time we are living the end of, right up to “Peak oil”), and after the “Contraction” (the collapse of society as cheap energy runs out).

The world of the Windup Girl is a post-synthetic biology world where synthetic organisms have gone wild and decimated natural populations, and “generippers” have created special humans, cheshire cats, killer weevils, and scourge upon scourge of killer diseases.

All the action of the book takes place in a Bangkok surrounded by levees to keep out the high water (caused by global warming, of course). The forces at play are calorie companies (ag companies trying to sell GM food); the Environmental Ministry (tasked to protect Thailand from external GM products, many which have gone haywire and ruined other countries); the Trade Ministry (salivating over the money GM products could bring, mostly through favors from the calorie companies); and the underworld of thieves, desperate immigrants, and the Mob.

The built world is so believable and interesting. You get into character, understanding how seeing a diesel vehicle is an exorbitant use of joules, or fat folks show off the calories they have access to, or how ice is a luxury (costs energy to produce). Also, guns and machines run off of springs, flywheels, and brute force (calories converted to kinetic energy).

The intricacy and world-building reminds me of Neal Stephenson (and not Gibson, to whom everyone seems to compare Bacigalupi – though I haven’t read Gibson in ages). And it was really exciting to see such a strong story wrapped around biology in a semi-post-electronic age. One thing that stood out, at least for the practical microbiologist in me, was there was nothing about microbes. The animals that were functional, were larger organisms and a bit exotic (such as mating glow-worms).

In any case, I highly recommend this book to someone who likes well-written SF with well-thought out world-building and a strong twist of bioscience. All the rest of you should read it just to blow your minds.

Here’s a nice concluding quote from a review in the Guardian:

The Windup Girl embodies what SF does best of all: it remakes reality in compelling, absorbing and thought-provoking ways, and it lives on vividly in the mind.”

Image from Wikipedia (warning, spoilers!)

Report: Current European Biofuel Policies ‘Unethical’ – ScienceInsider

“An E.U.-sponsored certification scheme should adhere to the following principles:
* Biofuels development should not be at the expense of human rights
* Biofuels should be environmentally sustainable
* Biofuels should contribute to a reduction of greenhouse gas emissions
* Biofuels should adhere to fair-trade principles
* Costs and benefits of biofuels should be distributed in an equitable way “

Bioethics comes to biofuels. With all the talk here in the US about corn-derived biofuel, I think this report pushes the discussion forward even more: yes, we need renewable sources of fuel, but we need to take the total cost into consideration, not make biofuel for biofuel’s sake. Furthermore, total cost has to be more than “considered”, there needs to be a way to make producers and distributors and users pay for the true cost at each stage, rather than letting the environment and human right heap on the losses.

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Antarctic microbes live life to the extreme : Nature News

“You might not expect bacteria living in Antarctic ice to be well suited to life in a boiling kettle, but that is what Chilean scientists discovered during an expedition last year. The researchers have turned up more than 200 new species of microorganisms adapted to living in extreme environments.”

This is a really cool report on bugs that were found in the South Shetland Islands. Though I wouldn’t call them simply scientists, as these folks were indeed prospecting for practical microbes. They found extremophiles of all sorts: psychrophiles, halophiles, acidophiles, alkaphiles, and a new Deinococcus. The scientists are excitedly starting to envision potential applications. They even were able to find a ton of strains of actinomyces, suggestion they might find new antibiotics, too.

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ScienceShot: Toads Keep Their Brains Germ-Free – ScienceNOW

“By performing genetic analyses and mass spectrometry on ground-up toad brains, the researchers found 79 different antimicrobial peptides—the widest variety ever seen in the brain of any animal.”

As antibiotics start to lose their efficacy, new sources and mechanisms of antimicrobials will have to be found, such as bacteriocins and these peptides from frogs.

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Presentation: Product Stewardship – Lynne Pledger

In one panel, I got upset that all recycling talk was about the consumer and the waste management companies. I asked what about producer responsibility. To my surprise, I found out that there is very little Extended Producer Responsibility in the US. Having lived in Europe and worked at Nokia, I thought it was normal to require manufacturers to take back their product for recycling and to require them to design their products for recycling (and reduced waste). Alas, the US is woefully behind.

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Presentation: What’s In Your Trash – Michael Alexander

Great presentation on what it would take to get to zero waste. Michael was a great presenter as well.

What’s really cool is that the US is hovering around 25% (35% for MA) waste diversion. And it wouldn’t take much to get to 50%. Indeed, this presentation shows examples of towns that have gone beyond 50% with some simple processes and cultural changes, with a bit of policy arm twisting.

The funny thing is when Michael mentioned the last 10% that would be the hardest to not just dump in a landfill.

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