Check out
Managed hosting in Europe
Are you looking for quality managed hosting in Europe? Our company has two datacenters in Prague and Brno. Check out our managed hosting service ...
Search
Calendar
| Mo | Tu | We | Th | Fr | Sa | Su |
|---|---|---|---|---|---|---|
| 1 | ||||||
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 | 25 | 26 | 27 | 28 | 29 |
| 30 | 31 | |||||
Navigation
6,175 articles mezi dny 1.8.2010 a 31.8.2010
-
SUNDAY 1. AUGUST, 2010
-
06:00
Mining bacterial genomes reveals valuable 'hidden' drugs
A new tool to excavate bacterial genomes that potentially hide a rich array of pharmaceutical treasures has led to the discovery of a novel antibiotic. The study, reported in the August issue of Microbiology, could lead to new treatments for serious diseases that are rapidly acquiring multi-drug resistance. -
06:00
Mining bacterial genomes reveals valuable 'hidden' drugs
A new tool to excavate bacterial genomes that potentially hide a rich array of pharmaceutical treasures has led to the discovery of a novel antibiotic. The study could lead to new treatments for serious diseases that are rapidly acquiring multi-drug resistance.
-
06:00Neurobehavioral impairments such as delayed reaction times accumulated across a period of five days when sleep was restricted to less than four hours per night. Measures of alertness improved significantly after a night of recovery sleep, with larger doses of sleep producing greater gains. Yet some neurobehavioral deficits continued to linger after the maximum recovery dose of 10 hours in bed, during which participants slept for an average of about nine hours.
-
06:00Within 24 hours of culturing adult human stem cells on a new type of matrix, University of Michigan researchers were able to make predictions about how the cells would differentiate, or what type of tissue they would become. Their results are published in the Aug. 1 edition of Nature Methods.
-
06:00Within 24 hours of culturing adult human stem cells on a new type of matrix, researchers were able to make predictions about how the cells would differentiate, or what type of tissue they would become.
-
06:00Obesity is poised to overtake tobacco use as the leading cause of preventable death in the United States. With over 30 percent of US adults obese, the significant adverse health effects of obesity (including heart disease and diabetes) are widespread. Two studies published in the August issue of the Journal of the American Dietetic Association shed light on behaviors regarding food choices and good nutrition and report on how nutritional labeling and point-of-purchase signs are influencing healthy food choices.
-
06:00A new membrane developed at the University of Rochester's Laboratory for Laser Energetics blocks gas from flowing through it when one color of light is shined on its surface, and permits gas to flow through when another color of light is used. It is the first time that scientists have developed a membrane that can be controlled in this way by light.
-
06:00Researchers have identified a new way to regulate the uncontrolled growth of blood vessels, a major problem in a broad range of diseases and conditions.
-
06:00The risk of any cardiovascular disease for adults who reported sleeping five hours per day or less was more than two times higher than that of people who reported a daily sleep duration of seven hours (adjusted odds ratio = 2.20). Participants who reported sleeping nine hours or more per day also had an elevated risk of cardiovascular disease (adjusted OR = 1.57). Results were adjusted for potential confounders including smoking, diabetes, hypertension and depression.
-
06:00A new study suggests that regularly sleeping for more or less than seven hours per day is associated with an increased risk of cardiovascular disease.
-
06:00At 2 to 4 weeks of age, the mean strength of a pulsatile air-jet stimulus that was required to induce arousal during quiet sleep was significantly lower in male infants than female infants. At 2 to 3 months of age when the SIDS risk peaks, this gender difference in arousal threshold was no longer significant. Results suggest that there are no gender differences in arousability that could increase the vulnerability of male infants to SIDS.
-
06:00A new study shows that at 2 to 4 weeks of age male infants are easier to arouse than females during quiet sleep, and by 2 to 3 months of age there are no significant gender differences in arousability. The results suggest that the increased rate of sudden infant death syndrome (SIDS) in males may not reflect a pre-existing vulnerability involving arousal responses.
-
06:00Researchers at the University of California, San Diego, School of Medicine have identified a new way to regulate the uncontrolled growth of blood vessels, a major problem in a broad range of diseases and conditions.
-
06:00A newly developed membrane blocks gas from flowing through it when one color of light is shined on its surface, and permits gas to flow through when another color of light is used. It is the first time that scientists have developed a membrane that can be controlled in this way by light.
-
05:30
China launches new global positioning satellite (Reuters)
Reuters - China took a further step on Sunday toward ending its dependence on U.S. satellites to provide navigation and positioning services. -
04:54
AP - Spike Lee has screened his new four-hour documentary on the massive BP oil spill in the Gulf of Mexico and says no one from the oil giant is speaking to him.
-
04:21
AFP - Engineers readied a plan to permanently seal the ruptured Gulf of Mexico oil well, despite delays to the process caused by debris left behind by a recent tropical storm.
-
02:08
AP - U.S. regulators earlier this year demanded improvements to the pipeline network that includes a segment that ruptured in southern Michigan, spilling hundreds of thousands of gallons of oil into the Kalamazoo River, according to a document released Saturday.
-
01:30
Weapons Dumped Off Hawaii Should Remain There, Army Says
A university study finds that the chemical weapons, five miles south of Pearl Harbor, pose no hazard but are deteriorating and should be monitored.
-
01:16Reuters - Sri Lanka's central highlands and a protected marine area in Hawaii, the only habitats of several endangered plant and animal species, have been added to UNESCO's list of World Heritage sites, the U.N. body said on Saturday.
-
01:06
The aurochs: due for a comeback? | Palaeontology
Robin McKie on how scientists aim to bring back the aurochs, wild ancestor of modern cows
"They are a little below the elephant in size and?? their strength and speed are extraordinary. They spare neither man nor wild beast which they have espied." Thus Julius Caesar described the aurochs, an ancient ancestor of domestic cattle which inhabited much of Europe before being wiped out hundreds of years ago.
Today, the only evidence we have for the existence of these great bovines, which stood more than 2m high and weighed more than a tonne, are a few skeletons in museums and several dramatic cave paintings made by Cro-Magnon people tens of thousands of years ago. The latter show how these giant creatures ?? which had giant forward-facing horns and a white stripe down their spines ?? dominated the landscape and the imaginations of early human beings.
But now scientists are attempting to turn back the clock ?? by resurrecting the aurochs. A European project has been set up to bring these wild ancestors of modern domestic cattle back from the dead, though the scientists involved stress this will be achieved not by cloning them from ancient DNA, but by crossing existing breeds.
"Basically, it [the aurochs] was a big cow ?? nearly 2m high at the shoulder, and built vaguely like the love child of the Spanish fighting bull with a dash of Highland cow thrown in to make it hardier," says researcher Magdalena Michalak of Bryn Mawr college, Pennsylvania. By taking DNA from these breeds and others, and by examining the ancient DNA of aurochs, preserved in their bones, researchers aim to pinpoint promising species of modern cattle which carry aurochs genes and which can be bred selectively to reproduce an aurochs, a process known as back-breeding.
Project Tauros has been set up at universities in Germany, Poland and Spain where scientists are now sifting through the DNA of modern cattle breeds to find the most promising sections. "Then we will use a mathematical program to mix the cattle breeds so that the crossbreeds will end up like aurochs," said Henri Kerkdijk, the project's manager. "The goal is to breed a type of cattle that is not physically but genetically similar to the aurochs."
It will be a remarkable achievement if successful: the first animal to be brought back from extinction and returned to the wild.
guardian.co.uk © Guardian News & Media Limited 2010 | Use of this content is subject to our Terms & Conditions | More Feeds -
01:05
The ghost slug, discovered in south Wales, is named after its appearance and nocturnal habits
The ghost slug, Selenochlamys ysbryda, is a species new to science discovered in a garden in Glamorgan, south Wales. Like about one-third of British species of slugs, this one may have been accidentally introduced to the UK by human commerce. The residence where it was found sits on land that was once a horticultural nursery. Since its initial discovery, this species has been collected from a number of urban environments in south Wales and neighbouring England. The size of the slug, up to 110mm when fully extended, illustrates gaps in our knowledge of species, literally in our own gardens. The name is a Latinised form of the Welsh ysbryd (meaning ghost or spirit), referring to its appearance and nocturnal habits.
International Institute for Species Exploration, Arizona State University
guardian.co.uk © Guardian News & Media Limited 2010 | Use of this content is subject to our Terms & Conditions | More Feeds -
01:05
The new breed of commercial spacecraft
-
01:05
-
01:02
Naposledy aktualizované zdroje
-
-
BBC Science/Nature (dnes, 03:47)
-
-
PhysOrg (dnes, 01:25)
-
-
ScienceNOW (dnes, 01:12)
-
National Geographic News (dnes, 00:48)
-
Sci-Tech Today (24. 5, 23:45)
-
CBC - Technology & Science News (24. 5, 22:49)
-
Discovery (24. 5, 22:06)
-
-
-
TIME (23. 5, 08:40)
-
NASA (18. 5, 07:24)
-
Technology Review Feed - Tech Review Top Stories (16. 1, 22:07)
