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Race Driver: Grid (stylized as Racedriver GRID, in the Americas, known simply as GRID) is the most recent addition to the TOCA Touring Car series.
Doom 3: Resurrection of Evil Game Guide
Doom 3: Resurrection of Evil is a first-person shooter video game developed by Nerve Software and id Software. It was released for the PC on April 3, 2005, as an expansion pack for Doom 3 and on October 5, 2005, for the Xbox video game console.
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New Yk city was beaten with a series of murders and the death toll mounting. FBI Agent Nicole Bonnet F to find an advantage it has become impossible as it seems that the victims are all antiques and collects and unrelated to the other.
Air Conflicts: Secret Wars 2011
Air Conflicts: Secret Wars is an arcade flight simulator set for World War II scenario +. During his seven campaigns, the player must fly and fight with more than 48 missions.
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When planning to take a trip, the hard task is packing all the things that you really need and leaving the things that you want. To make your travel packing a whole lot easier, here are a few helpful tips that should help you:
Sabtu, 23 November 2013
Google Says: 8 Days To Remove Murder Scene From Maps
Rabu, 30 Oktober 2013
Ever wonder how your email goes from A to B? Google's new animation shows you how
- Google reveals how 'Gmail' campaign from your home, through underground affairs and into Google's 'Post Office', afore traveling on to your recipient
- Google asks its advisers to plan in shorts rather than aerate gigantic arrays of computer harder drives
- Company 'recycles 100% of accouterments equipment' - alienated the acquirement of 90,000 new computers back 2007
- 'This accomplished cruise took just abnormal and happens billions of times a day.'
Selasa, 29 Oktober 2013
5 Sky Events This Week: Morning Comets and Solar Eclipse
Kamis, 12 September 2013
Teen Drops $33K on Historic Wikileaks Server Using Dad’s eBay Account
Rabu, 04 September 2013
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Sabtu, 24 Agustus 2013
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Senin, 19 Agustus 2013
The ‘Mood Graph’: How Our Emotions Are Taking Over the Web
Jumat, 07 Juni 2013
Atomic Bomb Fallout Helps Solve Brain Mystery
For an extended time, scientific dogma control that our brains didn't manufacture new neurons throughout adulthood, says Pasko Rakic, a neurobiologist at university UN agency wasn't concerned within the study. In 1998, however, a bunch of Swedish researchers reported the primary proof that neurons square measure regularly born throughout the human period of time. The researchers injected a compound unremarkably accustomed label growth biological process into patients UN agency had united to own their brains examined once death. once the scientists examined the postmortem brain tissue, they found that new neurons had so sprung forth throughout adulthood. The cells were placed in an exceedingly a part of the hippocampus—a try of seahorse-shaped structures placed deep among the brain and concerned in memory and learning. The compound was later found to be nephrotoxic, however, and also the experiment was ne'er continual.
Since 1998, variety of studies have incontestable that new neurons square measure generated within the same little region of the hippocampus in mice and seem to play a very important role in memory and learning, says Kirsty Spalding, a biologist at the Karolinska Institute in national capital and lead author of the new study. as a result of the 1998 work was ne'er confirmed by freelance analysis, however, scientists have ferociously argued over whether or not the nerve cell birth seen in mice conjointly happens in individuals.
More than ten years past, Spalding’s authority, Jonas Frisén, a somatic cell scientist at the Karolinska Institute and study author, urged her to require on a project aimed toward sinking this discussion by victimization Associate in Nursing unconventional approach. The method, that has taken Spalding over a decade to develop, hinges on a colossal pulse of hot carbon-14 isotopes free by nuclear explosions within the Nineteen Fifties and ’60s, that doubled the quantity of carbon-14 within the atmosphere. This pulse stopped with the restricted forbiddance accord of 1963, that illegal surface tests of nuclear weapons, and also the unstable carbon-14 isotopes have steady decayed. as a result of cells incorporate carbon from the atmosphere into their DNA as they divide, the proportion of carbon-14 to the additional stable carbon atom carbon-12 acts as a time stamp for once a cell was born.
Spalding has been victimization this quantitative relation to work out the age of teeth in rhetorical investigations and also the ratio of fat cells. however she had to enhance the sensitivity of the technique so it may find the atom quantitative relation in DNA from the roughly 6-gram sliver of neural tissue within the hippocampus thought to provide new neurons, the rough complex body part. At best, the atom is gift in barely one out of each fifteen neurons, she says, creating it tough to find in little amounts of tissue.
For the primary five years, Spalding worked on finding a good method of separating the roughly twenty million neurons within the rough complex body part from alternative sorts of hippocampal cells so extracting their DNA. Discovering that she may use a fluorescence-activated cell sorting machine to tell apart non-neuronal cells from neurons by creating them glow in several colours was “a division,” she says. subsequent five years were for the most part spent on finding ways in which to purify the DNA samples and extract and analyze the carbon atoms victimization high-powered particle accelerators. “We had a few years with none results,” Frisén says. “It was fun, however frustrating.”
After finally obtaining the technique perfect, Spalding set that it absolutely was time to do it on some real human brain tissue. She and her colleagues extracted hippocampi from fifty five deceased folks that had given consent to own their brains studied. They then ground up the tissue samples, sorted the cells, and extracted the DNA. Next, she sent the pure genetic material to the Lawrence suffragist National Laboratory in American state, wherever it absolutely was reduced to pure carbon pellets and split into totally different carbon isotopes by weight in an exceedingly accelerator, permitting the researchers to calculate the quantitative relation between carbon-12 and carbon-14.
Spalding, Frisén, and colleagues then created a mathematical model estimating, supported those ratios, the speed of cellular turnover among the hippocampal neurons. over a 3rd of hippocampal neurons were often replaced, with roughly 1400 new neurons additional every day throughout adulthood, they report on-line these days in Cell. “Some cells square measure dying, some square measure being replaced,” Spaulding says. “There could be a constant flux of life and death.”
“This could be a spectacular freelance confirmation” of the 1998 study suggesting that new neurons square measure born throughout adulthood within the rough complex body part, writes Gerd Kempermann, a neurobiologist at the German Center for Neurodegenerative Diseases in city, in Associate in Nursing e-mail. “It can seemingly settle the case.”
Kempermann says that his own and other’s studies in mice indicate that contemporary adult neurons have a selected perform within the hippocampus—for example, in serving to the brain distinguish between things that belong to constant class, or comparison new data to what it's already learned from expertise. the power to tell apart between the rock group and Rolling Stones, however still establish each as “rock bands,” is one example of this sort of task in humans, Frisén says.
There is another risk, however: Our ability to switch hippocampal neurons can be Associate in Nursing biological process trace that's not all that vital these days, Rakic says. He argues that human survival might have depended not such a lot on our ability to provide new neurons, however on our ability to stay recent ones so as to accumulate recollections over the whole period of time. Compared with fishes, frogs, reptiles, and birds, a number of which might grow entire brain structures, he says, “it is fascinating that neuronic turnover in humans is restricted to one population of neurons in barely one comparatively little structure, and it's worthy to look at why it persists.”
Sabtu, 23 Februari 2013
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