glenster
JoinedPosts by glenster
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Chemists claim to have solved riddle of how life began on Earth
by glenster in(phys.org)a team of chemists working at the mrc laboratory of molecular biology, at cambridge in the uk believes they have solved the mystery of how it was possible for life to begin on earth over four billion years ago.
in their paper published in the journal nature chemistry, the team describes how they were able to map reactions that produced two and three-carbon sugars, amino acids, ribonucleotides and glycerolthe material necessary for metabolism and for creating the building blocks of proteins and ribonucleic acid molecules and also for allowing for the creation of lipids that form cell membranes.. scientists have debated for years the various possibilities that could have led to life evolving on earth, and the arguments have only grown more heated in recent years as many have suggested that it did not happen here it all, instead, it was brought to us from comets or some other celestial body.
most of the recent debate has found scientists in one of three chicken-or-the-egg first camps: rna world advocates, metabolism-first supporters and those who believe that cell membranes must have developed first.
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glenster
(Phys.org)—A team of chemists working at the MRC Laboratory of Molecular Biology, at Cambridge in the UK believes they have solved the mystery of how it was possible for life to begin on Earth over four billion years ago. In their paper published in the journal Nature Chemistry, the team describes how they were able to map reactions that produced two and three-carbon sugars, amino acids, ribonucleotides and glycerol—the material necessary for metabolism and for creating the building blocks of proteins and ribonucleic acid molecules and also for allowing for the creation of lipids that form cell membranes.
Scientists have debated for years the various possibilities that could have led to life evolving on Earth, and the arguments have only grown more heated in recent years as many have suggested that it did not happen here it all, instead, it was brought to us from comets or some other celestial body. Most of the recent debate has found scientists in one of three chicken-or-the-egg first camps: RNA world advocates, metabolism-first supporters and those who believe that cell membranes must have developed first.
The chemists with this new effort believe they have found a way to show that all three arguments are both right and wrong—they believe they have found a way to show that everything necessary for life to evolve could have done so from just hydrogen sulfide, hydrogen cyanide and ultraviolet light and that those building blocks could have all existed at the same time—in their paper, they report that using just those three basic ingredients they were able to produce more than 50 nucleic acids—precursors to DNA and RNA molecules. They note that early meteorites carried with them ingredients that would react with nitrogen already in the atmosphere, producing a lot of hydrogen cyanide. By dissolving in water, it could have very easily come into contact with hydrogen sulfide, while being exposed to ultraviolet light from the sun. And that, they claim, would have been all that was needed to get things going.
The findings by the team are sure to garner a great deal of interest in the scientific community and others will no doubt be testing and commenting on their findings. If what they claim passes muster, their work will likely be remembered as one of the great achievements of our time.
Explore further: NASA Ames reproduces the building blocks of life in laboratory More information: Common origins of RNA, protein and lipid precursors in a cyanosulfidic protometabolism, Nature Chemistry (2015) DOI: 10.1038/nchem.2202
Abstract
A minimal cell can be thought of as comprising informational, compartment-forming and metabolic subsystems. To imagine the abiotic assembly of such an overall system, however, places great demands on hypothetical prebiotic chemistry. The perceived differences and incompatibilities between these subsystems have led to the widely held assumption that one or other subsystem must have preceded the others. Here we experimentally investigate the validity of this assumption by examining the assembly of various biomolecular building blocks from prebiotically plausible intermediates and one-carbon feedstock molecules. We show that precursors of ribonucleotides, amino acids and lipids can all be derived by the reductive homologation of hydrogen cyanide and some of its derivatives, and thus that all the cellular subsystems could have arisen simultaneously through common chemistry. The key reaction steps are driven by ultraviolet light, use hydrogen sulfide as the reductant and can be accelerated by Cu(I)–Cu(II) photoredox cycling.http://phys.org/news/2015-03-chemists-riddle-life-began-earth.html
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First 27" 2560 x 1440 144Hz G-sync IPS-type panel
by glenster inacer predator xb270hu current champ of the gaming monitors http://www.tftcentral.co.uk/reviews/acer_xb270hu.htm http://www.overclock.net/t/1536499/official-acer-xb270hu-27-1440p-144hz-g-sync-ips-ulmb-monitor-thread https://www.youtube.com/watch?v=j-2f9myd0qy.
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glenster
You need Displayport 1.3 (and a powerful GPU or two) for a high refresh rate
with a 4K version. And a couple moneybags wouldn't hurt. It might pay to wait
a bit for prices to come down and new GPUs to come out. -
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First 27" 2560 x 1440 144Hz G-sync IPS-type panel
by glenster inacer predator xb270hu current champ of the gaming monitors http://www.tftcentral.co.uk/reviews/acer_xb270hu.htm http://www.overclock.net/t/1536499/official-acer-xb270hu-27-1440p-144hz-g-sync-ips-ulmb-monitor-thread https://www.youtube.com/watch?v=j-2f9myd0qy.
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glenster
Acer Predator XB270HU
Current champ of the gaming monitors
http://www.tftcentral.co.uk/reviews/acer_xb270hu.htm
http://www.overclock.net/t/1536499/official-acer-xb270hu-27-1440p-144hz-g-sync-ips-ulmb-monitor-thread
https://www.youtube.com/watch?v=j-2f9myD0qY -
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Remakes, Reboots, and Sequels
by Coded Logic inhot tub time machine 2. paul blart mall cop 2. the avengers 2. the woman in black 2. maze runner 2. ted 2. magic mike 2. sinnister 2. pitch perfect 2. hotel transylvania 2. .
taken 3. insidious chapter 3. the hunger games part 4. alvin and the chipmunks 4. mission impossible 5. fast and the furious 7. star wars 7. paranormal activity 9. jurassic world.
terminator genisys.
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glenster
original
"Jerry Lewis: The Nutty Professor (Part 1)"
https://www.youtube.com/watch?v=aFmes1p5oQo -
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Remakes, Reboots, and Sequels
by Coded Logic inhot tub time machine 2. paul blart mall cop 2. the avengers 2. the woman in black 2. maze runner 2. ted 2. magic mike 2. sinnister 2. pitch perfect 2. hotel transylvania 2. .
taken 3. insidious chapter 3. the hunger games part 4. alvin and the chipmunks 4. mission impossible 5. fast and the furious 7. star wars 7. paranormal activity 9. jurassic world.
terminator genisys.
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glenster
A remake that was better
https://www.youtube.com/watch?v=_bxfR-Vuo8Y -
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Inherit the wind
by truthseeker100 inhas anyone seen the movie inherit the wind?
i just got done watching the 1999 remake of the original 1960.. it's about two lawyers arguing in court about the guilt or innocence of a school teacher, teaching evolution.. it's about as pertinent today as it was in 1999 or 1960. it's really a good movie.
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PC monitors in 2015
by glenster infreesync, 4k, ips all that and over 60hz refresh rate awaits utilization of displayport 1.3 which has already been approved.. see the articles at the next link.
http://forums.blurbusters.com/viewforum.php?f=16.
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glenster
Freesync, 4K, IPS
All that and over 60Hz refresh rate awaits utilization of Displayport 1.3
which has already been approved.
See the articles at the next link.
http://forums.blurbusters.com/viewforum.php?f=16 -
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American Woman - Lucky 'peggers
by berrygerry inwow.. https://www.youtube.com/watch?v=c_fnga26hig.
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glenster
I think it was meant as anti-big city and anti-draft for the Vietnam war.
How the whole country's women, urban and rural, get targeted for those, esp.
when a big percent of the young ones more likely to be buying records were
protesting Vietnam, I have no idea. It just comes off as nationalism against
American women which is a dumb expression of those complaints and generally.
Enjoyable jam, though.
http://en.wikipedia.org/wiki/American_Woman_(song)#Interpretations_of_the_lyrics
