RSS feed for entries
 

 

Really new batteries

Your Blogscientist has been falling down on the job. A few days ago I saw plenty of headlines about new nanoscale batteries. Everything’s nano-whatnot these days. I figured I’d read about it later. No doubt somebody had an extra 5% improved energy yield or something.

Turns out, no, this is really new. A team at MIT has genetically engineered bacteriophages — a kind of virus that normally attacks bacteria — to assemble batteries. Put them in a soup with the right ingredients and they pull out what they need to assemble anodes, cathodes, and, in short, batteries. (Abstract of Proceedings of National Academy of Sciences article.)

the three authors, Yet-Ming Chiang, Angela Belcher and Paula Hammond, in the lab
From left, MIT professors Yet-Ming Chiang, Angela Belcher and Paula Hammond. The three have authored a paper detailing their virus-based method of creating and installing microbatteries by stamping them onto a variety of surfaces. Photo / Donna Coveney

It’s lab bench work at this point, but as Belcher says,

“[R]ight now the thing is trying to make the best material possible, and if we get a really great material, then we have to think about how do you scale it.”

Scaling up means laptop batteries, car batteries, and — shoot for the stars, any damn fool can hit the ground — electromagnetic rail gun spaceship launching batteries.

Technorati Tags: , , , , , ,

    Print This Post Print This Post

Time for your (mental) stretching exercises

Via Slashdot I found this Science News article which links to a mathematics site that’ll blow your mind up like bubble gum. It’s visualizations by mathematicians and graphic artists of four- and more-dimensional shapes. Plus, if you have any mathematical ability, in other words if you’re not like me, you may even understand what they’re talking about. But understanding isn’t needed to feel your mind expand.
Read more »

    Print This Post Print This Post

About Gooseberries

My issue of the Royal Horticultural Society Garden magazine arrived today, and the first thing I saw was:

Competitive gooseberry growing in northwest England has a long and distinguished history.

With a blurb like that, how could I not read the article? (Web version, which differs from the print one.) So I learned that growing the gooseberry supreme requires “pens” where the bushes can be protected from birds, shaded from excessive sun (In northwest England? You’re kidding me, right?), as well as excess rain which can burst the fruit. In the old days, a rhubarb leaf was inverted over the bush. I’ll dream tonight of shy gooseberry plants, peering out from under their peaked rhubarb leaf hats.

But I jest. Competitive gooseberrying is serious business. Follow me closely here.

The bushes must be carefully pruned like rose trees, and the crown of branches trained flat, like an umbrella, so that the berries hang down. Otherwise wind might blow the prize heavy berry onto the thickly thorn-covered branches of the bush. The berry would burst, and there you’d be at the next meeting of the gooseberry club with nothing to show for all your trouble.

Once a year, in late July or early August, everything must be in readiness for the “getter,” who witnesses the picking of the competition berries, their careful placement in boxes padded with cotton wool, and who seals the box so that no cheating with some kind of ersatz substituted berry can occur. (I think Ohio needs to get a gooseberry club to come and oversee the vote in November.)

Keeping the few prize berries in perfect condition on the tree until the getter arrives is one of the difficult tasks in a devoted gooseberry grower’s life. Months of concentration, watering, shading, and timing go to produce the perfect berry at exactly the week and the day when the judging takes place. That’s why, like migrating swifts who miss the one day the mayflies hatch, the growers are upset about this:

Kelvin [the current prize-holder] feels the gooseberry season is becoming earlier: “You can get them huge a week or so before — the challenge is to keep them intact on the tree until the getting.”

The trees are feeling the heat, and so are the gooseberry societies. They’re talking of moving their shows forward. Gooseberry judging dates: the new measure of global warming. And you thought I was joking when I said it was a serious business.

Technorati Tags: ,

    Print This Post Print This Post

Frying lettuce is not the answer

This is another story in the category of “We’re from the government. We’re here to help.” The reporting makes me want to bang my head against the desk, but I can’t because I’m writing this from a lawn chair in my back garden. All the stories stress how safe the process is. That is not the point. Not . . . the . . . point.

FDA to allow radiation of spinach and lettuce

Health regulators have approved the use of ionizing radiation for fresh spinach and lettuce, saying the technique already approved for other foods [ can help control harmful bacteria and other pathogens.

The Food and Drug Administration said on Thursday the radiation treatment also would make the leafy greens last longer and give them greater “shelf-life” for retailers and consumers.

The problem is not –not!– that radiation turns the lettuce into a Green Monster or that is leaves horrible radiation cooties all over the leaves.

The problem is that irradiating food is the equivalent of leaving it out in the sun for a few days. It destroys vitamins and lowers the nutritional value generally.

That is not good. I mean, you’re eating spinach because it’s good for you, for chrissakes. You’re not just trying to ingest a water-based form of greenish tissue paper.

The other problem is that by more or less sterilizing the surface, a host of bad farming practices can be covered up. Some of those bad practices, such as poor harvesting methods or taking longer to get the product to market, also lower nutritional value.

At least they are talking about labelling treated products.

Spinach and lettuce that have been irradiated will have to carry a special “radura” logo and state the product has been “treated with radiation” or “treated by irradiation,” FDA’s Kwisnek said.

I guess farmers have less clout than Monsanto and their ilk who have successfully kept everyone in the dark about which foods have genetically engineered traits, and what those are. I was, am, and always will be livid that I can’t boycott Round-Up resistant junk — or “Round-Up Ready” as they like to call it.

Technorati Tags: , , ,

    Print This Post Print This Post

Solar power, heat engines, good stuff

The annoying thing about all the clean energy technologies is that we can’t buy them and use them. Breakthroughs keep being reported, and then . . . nothing. If I had a solution to that problem, I’d be a lot richer than I am, but I’m a dreamer like everyone else. So, just to give you some more things to dream about, here are three advances on the energy front. (Life happened, so this is a few weeks past due, as usual for me.)

First is the discovery of how to channel light so that any window can act as a solar collector. Channeling light has been done since the first days of fiberoptics, and collecting light is the big problem facing photovoltaics. So it seems like somebody should have done this decades ago. As it happens, they tried in the 1970s. But there were no materials at the time capable of efficiently channeling light in the precise way required, nor did we have the right light-absorbing dyes. Materials scientists are the unsung heroes of the tech world.

four plates of clear glass with bright outlines of cyan, green, yellow, and red where the channeled light escapes at the edges(Photo / Donna Coveney) Read more »

    Print This Post Print This Post

Bullies

BBC headline this morning: Bush condemns ‘bullying’ Russia

Iraqis could not be reached for comment. The spokesman was stuck in a traffic jam caused by yet another new checkpoint.

Technorati Tags: , , , ,

    Print This Post Print This Post

Life, Mars, and Everything

Interesting times. From universetoday.com (via Slashdot):

The White House is Briefed: Phoenix About to Announce “Potential For Life” on Mars
It would appear that the US President has been briefed by Phoenix scientists about the discovery of something more “provocative” than the discovery of water existing on the Martian surface. … Whilst NASA scientists are not claiming that life once existed on the Red Planet’s surface, new data appears to indicate the “potential for life” more conclusively than the TEGA water results. Apparently these new results are being kept under wraps until further, more detailed analysis can be carried out….

These new MECA results are, according to the Phoenix team, a little more complex than the water “discovery.” Scientists are keen to point out however, that this secretive news will in no way indicate the existence of life (past or present) on Mars; Phoenix simply is not equipped make this discovery. What it can do is test the Mars soil for compounds suitable to support life. The MECA instrument does have microscopes capable of resolving bacterial-scale life forms however, but this is not the focus of the forthcoming announcement, sources say.

They seem a bit desperate not to find evidence of life. Mustn’t upset anyone entitled to their own facts, I guess.

The likeliest scenario is that this will turn out to be evidence of some carbon-based compounds. That, together with the earlier evidence that the Martian soil at the Phoenix site has water and Earth-like pH all points toward increased probability that there was or is life on Mars.

It’s bacterial life, at most, but that would be huge. Vast. Impossible to overstate. Because it means one of two things: either that life generally appears when there is carbon-based chemistry in the presence of water, or that some bacteria can make it through space often enough to seed life wherever conditions support it. Or both.

Either way, it would mean that life is common in the universe, not rare.


Technorati Tags: , , ,

    Print This Post Print This Post