quinta-feira, outubro 20, 2005

Pesquisa mostra como o combustível hidrogénio é gerado

O oxigênio é essencial para a vida. Mas, quando se trata de produzir hidrogênio, que pode ser utilizado como uma fonte de energia abundante, barata e sem qualquer tipo de poluição, o oxigênio é uma verdadeira pedra no sapato.
O "problema" é que o oxigênio e o hidrogênio se dão muito bem e reagem entre si - formando água - e paralisando o processo de geração do tão sonhado combustível barato e ambientalmente correto.
A reação do hidrogênio com o oxigênio acontece no interior de uma família de enzimas, presentes em muitos microorganismos, hoje vistas como uma das fontes potenciais para o fornecimento de hidrogênio. E até hoje os cientistas não sabiam exatamente como os dois se encontram, paralisando o processo de geração do hidrogênio.
Agora, cientistas da Universidade do Illinois, Estados Unidos, conseguiram modelar a rota dos dois elementos, permitindo que se veja como e por onde oxigênio e hidrogênio viajam para alcançar e sair do ponto de catálise das enzimas - o chamado grupo H - que é exatamente onde o hidrogênio é convertido em energia.
A descoberta resolve um problema econômico importante para a geração de energia limpa. Numerosos microorganismos possuem enzimas, conhecidas como hidrogenases, que utilizam somente água e luz do sol para gerar energia a partir do hidrogênio. Mas a insistência do oxigênio em se ligar ao hidrogênio simplesmente paralisa a geração do gás hidrogênio.
"Entender como o oxigênio chega ao ponto de reação irá nos permitir ver como a tolerância ao oxigênio da hidrogenase pode ser aumentada por meio da manipulação das proteínas e, em decorrência, tornar a hidrogenase uma fonte economicamente viável de hidrogênio-combustível," explica Klaus Schulten, um dos participantes da pesquisa.
Os cientistas concluíram que será possível fechar as rotas do oxigênio através da hidrogenase por meio da manipulação genética da proteína, aumentando a tolerância da enzima ao oxigênio, sem interromper a liberação do hidrogênio.
A pesquisa foi publicada no último exemplar da revista Structure.

33 Comments:

At 9:17 da tarde, Anonymous Anónimo said...

Entertaining blog here. You are bookmarked ;-)

I have a forex currency trading beginner site/blog.
Plenty of great forex currency trading beginner facilities.

Definitely worth a visit.

 
At 5:13 da tarde, Blogger Solariso said...

Seria por as enzimas a trabalhar para uma energia limpa.

 
At 9:44 da manhã, Anonymous Anónimo said...

I thought your blog visitors would like to see this add currency link suggest trading website:
add currency link suggest trading

 
At 12:24 da tarde, Blogger Gordon said...

hello, your blog is interesting to read, I have a currency trading website, it is informative and provides many currency charts and real time currency quote. It should be helpful to your trading.

 
At 5:02 da tarde, Blogger . said...

I just came across your blog, and wanted to drop you a note telling you how impressed I was with the information you have posted here. I also have a forex trading signal blog, so I know what I'm talking about when I say your site is top-notch! Keep up the great work, you are providing a great resource on the Internet here!

 
At 10:07 da tarde, Anonymous Anónimo said...

Hi,

Just browsing around the net for forex strategy and came across your blog. I've been trying to add as much info as I can about forex strategy on my site. But must admit I get a bit confused... there's just some many sites, tips, information ... you name about forex strategy it's hard to know where to begin!
I'm thinking of adding a forex strategy on my site, when I do, your all more that welcome to come a leave tips and help...

Until then take care!
Steward.

 
At 3:00 da manhã, Blogger HFUNDATION said...

I with no reasonable doubt say that the info you provided above was right to the point as we all know it forex forex forex forextraderguide.info sitemap.html trading can be very challenging and thus we should applaus to those that put in wore to provide us with all needed ideals and infomation. My self i`m very thankfull. You can get more ideals and info from my website forex forex forex forextraderguide.info sitemap.html trading

 
At 2:38 da manhã, Anonymous energy4u said...

Hello there Pedro, I seem to have stumbled on your site while looking for the best energy drink. However, there is some good stuff here, and I'd like to thank-you for an interesting diversion. If you yourself feel you need one, I hope you will visit my site too the best energy drink.

 
At 3:26 da manhã, Anonymous Energy Drinks said...

There are some really strange postings on Pedro. Surely, if people wanted information on the best caffeine free, low calorie energy drink, they would visit a site such as the best energy drink and get all the info on the best energy drink.

 
At 4:30 da manhã, Anonymous Anónimo said...

putting to waste some good money that could have been used in other areas of development for the business involved.

 
At 8:14 da tarde, Blogger Johnny said...

Hello, your blog is inmformative, I just found a brand new forex trading system using both Mathematical and psychlogical approch, hope you can visit and it will be useful to your trading life.

 
At 1:27 da tarde, Blogger Cleanergy said...

cleanergy.org is dedicated to promote clean energies, and is a participative media platform; I invite you to be a full member and contribute ! (just send a request to member@cleanergy.com)
Henry

http://www.cleanergy.org

 
At 11:51 da tarde, Blogger Ponto Verde said...

Admiramos imenso o vosso trabalho de divulgação. Parabéns.

 
At 8:22 da tarde, Blogger Bob said...

Check uot this site if you are thinking of online stock trading

 
At 11:02 da tarde, Blogger topraven4 said...

Hello ##NAME##. Interesting thoughts. Nice contribution. If you have time I have a site on ##LINK##. Maybe check it out. It might help you.

 
At 12:56 da manhã, Anonymous Forex Trade said...

Hello. Kinda bored,, but looking for information on forex course. Informative blog, good info. Maybe visit my site if you're looking for forex course related material forex course. Have a good day.

 
At 12:04 da tarde, Anonymous Anónimo said...

I have been following a site now for almost 2 years and I have found it to be both
reliable and profitable. They post daily and their stock trades have been beating
the indexes easily.

Take a look at Wallstreetwinnersonline.com

RickJ

 
At 5:23 da manhã, Anonymous Rick J said...

I have been following a site now for almost 2 years and I have found it to be both reliable and profitable. They post daily and their stock trades have been beating
the indexes easily.

Take a look at Wallstreetwinnersonline.com

RickJ

 
At 12:59 da tarde, Blogger Scott A. Edwards said...

Congradulations on a well written, interesting and superb blog! Have you heard about the shocking news? 1000's of real people are earning quiet fortunes from home using the most ingenious automated system ever invented.

Are you curious to find out what this is all about?

Why not? You have nothing to lose.

You can sign up for this system absolutely free of charge and check it all out for yourself.

To start off, we have a video presentation for you to watch. Just turn up the speakers if you can, and click on the link below.

Have fun and open your mind.

It is all right here: new-wave It successfully covers new-wave related stuff.

Come and check it out now, Scott :-)

 
At 9:00 da manhã, Blogger alberthaanstra said...

Hi Blogger!

Great Blog you have here. Did you hear about clean energy? Is it solar energy, wind energy or nuclear energy?
I think (and hope) it is positive energy!

Signed, Albert

 
At 9:44 da manhã, Blogger alberthaanstra said...

Hi Blogger!

Great Blog you have here. Did you hear about clean energy? Is it solar energy, wind energy or nuclear energy?
I think (and hope) it is positive energy!

Signed, Albert

 
At 2:01 da tarde, Anonymous currency trading tip said...

Just blogging for a while, my site is also about currency trading tip, so just saying what's up.

Charles

 
At 11:00 da manhã, Anonymous dxinone training said...

Hey!, Just browsing around for ideas for my new. (While we're at the same topic), I'm just getting started if you want to visit:
dxinone training

Charles

 
At 9:03 da tarde, Anonymous Anónimo said...

Just blogging for a while, my site is also about , so just saying hi.

Charles

 
At 5:23 da tarde, Anonymous Anónimo said...

Hey how are you doing? just letting you know that someone from Central America read your blog!
If you feel like visiting mine:
e-currency trading
Regards,
Charles

 
At 2:35 da manhã, Anonymous Anónimo said...

Hey what's up, just letting you know that someone from C.A. read your blog!

Regards,
Charles
currency demo trading

 
At 4:23 da manhã, Blogger Joe Berenguer said...

Hi Friend! You have a great blog over here!
Please accept my compliments and wishes for your happiness and success!
If you have a moment, please take a look at my site:
credit center
It covers credit center related subjects.
Have a great day!

 
At 4:25 da tarde, Blogger military loans said...

cant stop my self from commenting your nice blog . it was just so simple. do keep on writing. fast loan

 
At 5:26 da tarde, Blogger CommunityColumns said...

Sometimes I think forex market is too regulated then at other times I think that there isn't enough oversight.

 
At 11:14 da tarde, Blogger fatloss said...

Just browsing around the net for forex trading free commission and came across your blog. I've been trying to add as much info as I can about forex trading on my blog .

 
At 7:25 da manhã, Blogger Bloggerbiz said...

forex is a good way to make money

 
At 7:02 da tarde, Blogger EResourcesForSuccess said...

I wonder why my broker never talks about forex seminars.

 
At 4:46 da manhã, Blogger Greg Liddle said...

Great blog
If you have a few minutes come and visit my site.
It shows you a new Forex Currency Trading System

 

Enviar um comentário

<< Home

Comunidade Portuguesa de Ambientalistas
Ring Owner: Poli Etileno  Site: Os Ambientalistas
Free Site Ring from Bravenet Free Site Ring from Bravenet Free Site Ring from Bravenet Free Site Ring from Bravenet Free Site Ring from Bravenet