Monday, March 1, 2010

laboratory.

Reproduced Life building blocks in the laboratory.

Researchers from NASA who was studying the origin of life has been reproduced uracil, an important component in the material heritage of our descendants, in the laboratory. They mnemukan that samples of ice that covers a Pyrimidine exposed to ultraviolet radiation under space-like conditions that produce the essential ingredient in life.

Pyrimidine is a ring-shaped molecules made of carbon and nitrogen and is the basic structure of uracil, part of the genetic code found in ribonucleic acid (RNA). RNA is central to protein synthesis but has many roles.

"We have demonstrated for the first time that we are able to make uracil, an RNA component, non-biological laboratory under conditions found in space," said Michel Nuevo, a research scientist at the Ames Research Center at NASA, Moffett Field, Calif.. "We're showing that processing in the laboratory which simulates the appearance in space can create the fundamental building blocks used by living organisms on earth."

Nuevo is the head writer of a new research journal in the journal Astrobiology.

Researchers at NASA Ames has been simulated environments found in interstellar space systems and space a few years. During that time, they have been studying a group of compounds rich in carbon called polycyclic aromatic hydrocarbons (PAHs), which has been identified in meteorites, and is rich in carbon persenyawan most commonly observed in the universe. PAHs are typically six-carbon structure that resembles a circle or a hexagon terfusi chicken wire.

Pyrimidine also found in meteorites, although scientists still do not know its origins. This may be similar to PAHs are rich in carbon, in which an explosion may be produced at the end of the death of a large red star or formed in a thick cloud of gas and dust between stars.

"Some of the molecule as having Pyrimidine atoms - nitrogen atoms in their structure which make them as - if the behavior. When the molecule is less stable, it is very susceptible to damage by radiation than the opponent who did not have nitrogen, "said Scott Sandford, a space science researcher at Ames. "We wanted to test whether Pyrimidine can survive in space and whether this can be through the reaction transform it into a complex organic creature like nucleobase uracil."

In theory the researchers think that if Pyrimidine molecules can survive longer in a cloud of dust migrating into the star anatar they may be able to fortify themselves from the destruction of radiation. While in the clouds, most molecules freeze on grain dust - dust (like most of the moisture in the breath condensing on the cold window in winter).

The cloud - the cloud thick enough to cover most of the area around the outside of the radiation in space thereby providing some protection against some of the molecules in the cloud - the cloud.

They found that when Pyrimidine frozen in ice water, it is slightly more susceptible to damage by radiation. Instead of the damage affected most of the molecule - the molecule is changed into new forms such as the uracil component of RNA, which is found in the genetic creation of all living beings on earth.

"We're trying to show the mechanisms in space that form a molecule. Taking into account what we produce in the laboratory, chemical ice exposed to ultraviolet radiation may be an important step link between what happens in space with what was happening on Earth at the time of first development, "said Stefanie Milam, a researcher at NASA Ames makalh and lead author of the study.

"No one knows exactly how life originated on this earth. Our experiment showed that when the earth was formed, many of the building blocks of life seems to have since the beginning. Because we're simulating the conditions of universal astrophysicist, the same as where planets - planets formed, "said Sandford.

Reproduced Life building blocks in the laboratory.

Researchers from NASA who was studying the origin of life has been reproduced uracil, an important component in the material heritage of our descendants, in the laboratory. They mnemukan that samples of ice that covers a Pyrimidine exposed to ultraviolet radiation under space-like conditions that produce the essential ingredient in life.

Pyrimidine is a ring-shaped molecules made of carbon and nitrogen and is the basic structure of uracil, part of the genetic code found in ribonucleic acid (RNA). RNA is central to protein synthesis but has many roles.

"We have demonstrated for the first time that we are able to make uracil, an RNA component, non-biological laboratory under conditions found in space," said Michel Nuevo, a research scientist at the Ames Research Center at NASA, Moffett Field, Calif.. "We're showing that processing in the laboratory which simulates the appearance in space can create the fundamental building blocks used by living organisms on earth."

Nuevo is the head writer of a new research journal in the journal Astrobiology.

Researchers at NASA Ames has been simulated environments found in interstellar space systems and space a few years. During that time, they have been studying a group of compounds rich in carbon called polycyclic aromatic hydrocarbons (PAHs), which has been identified in meteorites, and is rich in carbon persenyawan most commonly observed in the universe. PAHs are typically six-carbon structure that resembles a circle or a hexagon terfusi chicken wire.

Pyrimidine also found in meteorites, although scientists still do not know its origins. This may be similar to PAHs are rich in carbon, in which an explosion may be produced at the end of the death of a large red star or formed in a thick cloud of gas and dust between stars.

"Some of the molecule as having Pyrimidine atoms - nitrogen atoms in their structure which make them as - if the behavior. When the molecule is less stable, it is very susceptible to damage by radiation than the opponent who did not have nitrogen, "said Scott Sandford, a space science researcher at Ames. "We wanted to test whether Pyrimidine can survive in space and whether this can be through the reaction transform it into a complex organic creature like nucleobase uracil."

In theory the researchers think that if Pyrimidine molecules can survive longer in a cloud of dust migrating into the star anatar they may be able to fortify themselves from the destruction of radiation. While in the clouds, most molecules freeze on grain dust - dust (like most of the moisture in the breath condensing on the cold window in winter).

The cloud - the cloud thick enough to cover most of the area around the outside of the radiation in space thereby providing some protection against some of the molecules in the cloud - the cloud.

They found that when Pyrimidine frozen in ice water, it is slightly more susceptible to damage by radiation. Instead of the damage affected most of the molecule - the molecule is changed into new forms such as the uracil component of RNA, which is found in the genetic creation of all living beings on earth.

"We're trying to show the mechanisms in space that form a molecule. Taking into account what we produce in the laboratory, chemical ice exposed to ultraviolet radiation may be an important step link between what happens in space with what was happening on Earth at the time of first development, "said Stefanie Milam, a researcher at NASA Ames makalh and lead author of the study.

"No one knows exactly how life originated on this earth. Our experiment showed that when the earth was formed, many of the building blocks of life seems to have since the beginning. Because we're simulating the conditions of universal astrophysicist, the same as where planets - planets formed, "said Sandford.

0 comments :

Post a Comment

you give times, i give you world,
if you have a website or something, please at the contents. thanks..

best regards,