Showing posts with label science. Show all posts
Showing posts with label science. Show all posts

Sunday, September 30, 2012

Science: Revive a mammoth is possible.


WorldWide Tech & Science. Francisco De Jesùs.


Science: Revive a mammoth is possible.




This is not science fiction. The cloning of an animal it is possible and, oddly controversial, revive a mammoth species extinct for 4500 years is considered a scientifically viable project.

The investigator and veterinarian Hwang Woo-suk, stem cell specialist, leads the initiative.

Through an agreement with the Federal University Northeastern Russia, South Korean scientists Sooamd Research Foundation will attempt to clone a woolly mammoth through their tissue samples with eggs from a current Indian elephant.

After applying the cell nuclear transfer process, common step in the process of cloning, the egg is implanted in the uterus of a live elephant, the mammoth  gestates for 22 months.

The agreement with the Russian university comes six months after the two sides signed an initial pact for South Korean researchers could use the samples taken from mammoth remains found in the glaciers of the Sakha Republic in the Russian Federation. Hwang Woo-suk was once considered a pioneer in the field of stem cells to clone a dog in 2005.

Experts believe that it is possible to clone a mammoth, since prehistoric animal cells that can be found both in the blood and internal organs such as the skin and bones. A César Paz y Mino, academic and geneticist, not surprised with this possibility. "The mammoth cloning is possible because the animal is found male and female Indian elephant is. The egg is always more important than sperm. "

Although for Eugenia del Pino, director of the Laboratory of Developmental Biology at the Catholic University of Quito,Ecuador this type of cloning has already been made with live animals, the mammoth and the elephant, even if they have close relationship, are different species.

 Paz y Mino holds that in any case, after cloning animals will try to play to achieve purification of information. However, from a hybrid gene never achieve a 100% pure. What is the desire to clone a mammoth? "There's always the hope of resurrecting an extinct species," said Del Pino, who in his role as biologist would see again the kind of Lonesome George, of the Pinta Island.

She is aware that science has advanced, but the project certainly stem cell specialist because previous attempts have falsified evidence to confirm their novel theories about human cloning.

 In 2009, a Seoul court sentenced him to two years in prison for falsification of genetic data and use public funds for their scientific projects. Additionally, the hypothetical cloning could affect the environment. "It is best to protect our planet, with its plant and animal species. You have to let the mammoths as beings of the past, "adds the researcher. Geneticist Ecuadorian emphasizes that cloning projects are also ethical questions. 

"Why do not respect the essence of the animal species?, Do we need to relive?" Asks Paz y Mino. "While it is true that doing so violates the essence of the species, the scientific whim always wanted to demonstrate their ability and progress."

The chronology:

1996 Dolly the sheep was the first mammal cloned from an adult cell. Ryuzo Yanagimachi 1997 The researcher cloned 22 mice alive, with good parenting. 2000 In Scotland also made history and controversy when the first cloned pigs. 2001 On this date, the American researcher Mark Westhusin Copycat created. 2002 cats were obtained and cloned and genetically modified to glow under ultraviolet light. 2003 Futi was created thanks to the DNA of a cow with a record in milk production. 2006 The researcher Hwang Woo-suk cloned the first dog, an Afghan named Snyppy. 2009 In Camel Reproduction Centre in Dubai for the first time cloned a camel. Got 2010 was the first cloned fighting bull in Spain. With it opened the possibility of creating a tissue bank. 2012 The Research Foundation Sooamd Federal University in Seoul and Northeast of Russia initiated a project to clone a mammoth with an Indian elephant.

Wednesday, August 15, 2012

Science: A drainage system of the brain is discovered.


WorldWide Tech & Science. Francisco De Jesùs.


Science: A drainage system of the brain is discovered.

Neuroscientists Medical Center, of the University of Rochester (USA) have discovered a drainage system by which the brain eliminates waste, according to a study published today in Science Translational Medicine, they expect to have application in Alzheimer's research and Parkinson's. 

The system acts like pipes that leverage the brain's blood vessels and seems to do the same function in the brain that the lymphatic system in the rest of the body, drain waste products. 

The lead author and co Neuromedicina Center at the University of Rochester, Maiken Nedergaard said "waste cleanup is vital to all organs and have long been questions about how the brain gets rid of their waste .

 "This work shows that the brain is being cleaned in a more organized and a much larger scale than was previously believed," Nedergaard said he expressed his wish that this finding is useful for treating brain diseases.

 " We hope that these results have implications for many conditions affecting the brain such as traumatic brain injury, Alzheimer's disease, stroke and Parkinson's disease, "he added. Nedergaard's team has called the new system" the glinfático system "because it acts similarly to the lymphatic system, but is managed by brain cells called glial cells. 

The team made the discovery in mice, whose brains are very similar to the human brain. Scientists have known that CSF has an important role in cleaning the brain tissue, charged with waste products and nutrients to the brain tissue through a process known as diffusion. 

The newly discovered system circulates through all parts of the brain more efficiently through what scientists call the global flow. "It's as if the brain has two garbage collectors - one slow and one fast we knew we just met," Nedergaard said "Given the high rate of metabolism in the brain and high sensitivity, it is not surprising that its mechanisms for disposal of waste is more specialized and extensive than previously thought, "he added.

Tuesday, August 14, 2012

Scientists warn of possible solar storm in 2014.


WorldWide Tech & Science. Francisco De Jesùs.


Scientists warn of possible solar storm in 2014.

An expert panel found that this phenomenon, more and more common, occur within the next two years and may affect global electrical systems and satellites in orbit.

Usually we are used to understand the concept of "natural disaster" in phenomena such as earthquakes, volcanoes, tidal waves and tsunamis. However, a group of NASA scientists warned of an event that is still contingency plans in the world, solar storms.

Solar storms are phenomena which have been heard enough in recent times but could increase with the years.

The panel found that by 2014 the world will face a wave could affect solar electricity systems, communications and satellites around the world.

This could be the biggest event in a cycle of 10 years in the activity of the star and, if filed, would be the first in more than 100 years.

Among the possible consequences that could cause the magnetically charged plasma on earth, is the melting of the electrical transformers in the world, damage satellites and communication systems.

The last solar storm of this magnitude occurred in 1859. At the time, the British astronomer Richard Carrington observed the large solar flare and timed the arrival of geomagnetic storms caused by the phenomenon to Earth with a delay of about 17 hours.

According to reports at the time, the solar storm was so massive that formed northern lights that could be seen much further south than where they usually are.

The question that remains for NASA experts is what the actual impact of a storm of this nature, taking into account the number of satellites in orbit and the effects of their damage globally.