Now, humans can give swine flu to pigs

Washington, July 10 (ANI): In a new twist to the deadly swine flu pandemic, it has been found that the strain of influenza, A/H1N1, can now be transferred from humans to pigs, and can spread rapidly in a trial pig population.

For the study, Dr Thomas Vahlenkamp and a team of virologists from the Friedrich-Loeffler-Institut in Greifswald-Insel Riems, Germany, experimentally infected five pigs with the strain of swine flu, which is causing the current human pandemic.

They found that, within four days, the virus had spread to three un-infected pigs housed with the infected ones, and all pigs were showing clinical signs of swine flu.

“Although in the early stages of the swine flu pandemic there were worries that humans would catch the virus from pigs, this has so far not been documented and pigs and other animals have not been involved in the current spread of A/H1N1 influenza in humans,” said Vahlenkamp,

He added: “However, with the increasing numbers of human infections, a spill over of this human virus to pigs is becoming more likely. The prevention of human-to-pig transmissions should have a high priority in order to avoid involvement of pigs in the epidemiology of this pandemic”.

Although the virus spread quickly to the non-infected pigs, it did not spread to five chickens that were housed together with the pigs.

Thus, the researchers concluded that while the virus can pass from humans to pigs, it does not pass from pigs to chickens.

The experiments were done under strict containment conditions (Biosafety Level BSL3+), to prevent any further transmission of the virus from the infected pigs.

The scientists recommend that persons who are suspected of having swine flu should not be allowed to have contact with pigs.

In addition, regulatory bodies should decide on appropriate restriction measures for swine holdings where A/H1N1 infection is detected.

Experiments are underway to determine whether currently available vaccines may be able to provide pigs with a certain immunity to stop a potential spread of the virus.

The study has been published in Journal of General Virology. (ANI)

Scientists invent world’s fastest and most sensitive astronomical camera

Munich, June 19 (ANI): Scientists have invented the world’s fastest and most sensitive astronomical camera that can take 1500 finely exposed images per second even when observing extremely faint objects.

The first 240×240 pixel images with the world’s fastest high precision faint light camera were obtained through a collaborative effort between ESO and three French laboratories from the French Centre National de la Recherche Scientifique/Institut National des Sciences de l’Univers (CNRS/INSU).

Cameras such as this are key components of the next generation of adaptive optics instruments of Europe’s ground-based astronomy flagship facility, the ESO Very Large Telescope (VLT).

“The performance of this breakthrough camera is without an equivalent anywhere in the world. The camera will enable great leaps forward in many areas of the study of the Universe,” said Norbert Hubin, head of the Adaptive Optics department at ESO.

OCam will be part of the second-generation VLT instrument SPHERE. To be installed in 2011, SPHERE will take images of giant exoplanets orbiting nearby stars.

A fast camera such as this is needed as an essential component for the modern adaptive optics instruments used on the largest ground-based telescopes.

Telescopes on the ground suffer from the blurring effect induced by atmospheric turbulence.

This turbulence causes the stars to twinkle in a way that delights poets, but frustrates astronomers, since it blurs the finest details of the images.

Adaptive optics techniques overcome this major drawback, so that ground-based telescopes can produce images that are as sharp as if taken from space.

The new generation instruments require these corrections to be done at an even higher rate, more than one thousand times a second, and this is where OCam is essential.

Cameras normally used for very high frame-rate movies require extremely powerful illumination, which is of course not an option for astronomical cameras.

OCam and its CCD220 detector, developed by the British manufacturer e2v technologies, solve this dilemma, by being not only the fastest available, but also very sensitive, making a significant jump in performance for such cameras.

Because of imperfect operation of any physical electronic devices, a CCD camera suffers from so-called readout noise.

OCam has a readout noise ten times smaller than the detectors currently used on the VLT, making it much more sensitive and able to take pictures of the faintest of sources. (ANI)

It’s official: Moms-in-law are chief cause of divorces in India

Kuala Lumpur, May 27 (ANI): A new study has confirmed what every married person always believed – mothers-in-law are the number one reason why Indian couples get divorced.

According to data in the Malaysia Community and Family Study 2004 by the National Population and Family Development Board (LPPKN), “meddlesome in-laws” are the chief cause of divorces, especially in the Indian community.

It is also among the top three factors for divorce among the Malays and Chinese, the other two factors being are incompatibility and infidelity, reports The Star Online.

“Interference by in-laws is the main reason for Indians to divorce. It is the top-ranked reason at 30 percent,” said LPPKN director-general Datuk Aminah Abdul Rahman when presenting a paper on Malaysia’s family profile and its effects at Institut Kefahaman Islam Malaysia yesterday.

“Among Malays, the second most common reason is infidelity and refusal to put up with polygamy,” she said.

“Among the Indians, infidelity is the second highest ranked reason for divorce at 25 percent,” she added.

The Chinese, however, considered infidelity as the least crucial reason for a divorce.

“Another overall reason which ranked high among the three races at 11.5 percent is ‘not being responsible’,” she said.

The study surprisingly showed that divorce is more likely to happen to those under 25 and above 40. (ANI)

World’s oldest manufactured beads are older than previously thought

Washington, May 7 (ANI): A team of archaeologists has claimed to have discovered the world’s oldest manufactured beads in a limestone cave in Eastern Morocco, which are older than previously thought.

The researchers have found 47 examples of Nassarius marine shells, most of them perforated and including examples covered in red ochre, at the Grotte des Pigeons at Taforalt.

The fingernail-size shells, already known from 82,000-year-old Aterian deposits in the cave, have now been found in even earlier layers.

While the team is still awaiting exact dates for these layers, they believe this discovery makes them arguably the earliest shell ornaments in prehistory.

The shells are currently at the centre of a debate concerning the origins of modern behaviour in early humans.

Many archaeologists regard the shell bead ornaments as proof that anatomically modern humans had developed a sophisticated symbolic material culture.

Up until now, Blombos cave in South Africa has been leading the ‘bead race’ with 41 Nassarius shell beads that can confidently be dated to 72,000 years ago.

Aside from this latest discovery unearthing an even greater number of beads, the research team says the most striking aspect of the Taforalt discoveries is that identical shell types should appear in two such geographically distant regions.

As well as Blombos, there are now at least four other Aterian sites in Morocco with Nassarius shell beads.

The newest evidence shows that the Aterian in Morocco dates back to at least 110,000 years ago.

According to Research team leader, Professor Nick Barton, from the Institute of Archaeology at the University of Oxford, “These new finds are exciting because they show that bead manufacturing probably arose independently in different cultures and confirms a long suspected pattern that humans with modern symbolic behaviour were present from a very early stage at both ends of the continent, probably as early as 110,000 years ago.”

Also leading the research team, Dr Abdeljalil Bouzouggar, from the Institut National des Sciences de l’Archeologie et du Patrimoine in Morocco, said, “The archaeological and chronological contexts of the Taforalt discoveries suggest a much longer tradition of bead-making than previously suspected, making them perhaps the earliest such ornaments in the world.”

Archaeologists widely believe that humans in Europe first started fashioning purely symbolic objects about 40,000 years ago, but in Africa this latest evidence shows that humans were engaged in this activity at least 40,000 years before this. (ANI)

Writer’s cramp linked to abnormalities in fibres connecting brain areas

Washington, April 14 (ANI): Muscle disorders like writer’s cramp may result from abnormalities in fibres connecting different brain areas, according to a study.

Dr. Christine Delmaire, of Centre Hospitalier Regional Universitaire Roger Salengro, Lille, France, and Institut ational de la Sante et de la Recherche Medicale, Paris, came to this conclusion after studying 26 right-handed patients with writer’s cramp and 26 right-handed control participants, who were the same sex and age.

All subjects underwent diffusion-tensor magnetic resonance imaging (DTI) that assesses the status of white matter, coated nerve fibres that allow impulses to travel through the brain.

Christine said that the DTI scans of the writer’s cramp patients revealed areas of abnormalities in the white matter of nerve pathways connecting the main sensorimotor cortex to brain areas below the cortex, such as the thalamus.

The researchers further revealed that the same abnormalities were not observed in healthy controls.

“In conclusion, his study suggests hat writer’s ramp is associated with microstructural changes involving fibers that carry afferents (information from senses to the brain) and efferents (motor information from the brain to the muscles) to the primary sensorimotor cortex. However, it is unknown how these changes relate to the physiopathology of the disease,” the authors write.

The study has been published in the Archives of Neurology, one of the JAMA/Archives journals. (ANI)

Scientists discover pentagonal ice that can be used to seed clouds

Washington, April 8 (ANI): Scientists at the University of Liverpool, UK, have discovered a five-sided ice chain structure that could be used to form clouds in the atmosphere and modify future weather patterns.

Researchers, in collaboration with University College London and the Fritz-Haber Institut in Berlin, created the first moments of water condensing on matter – a process vital for the formation of clouds in the atmosphere – by analysing how the two interact on a flat copper surface.

Ice has rarely been viewed at the nanoscale before and the team discovered a one-dimensional chain structure built from pentagon-shaped rings, rather than the more commonly seen hexagonal structures of ice formations like those seen in snowflakes.

This discovery could lead to scientists developing new materials for seeding clouds and causing rain.

Cloud seeding is a form of weather modification, where the amount or type of precipitation that falls from clouds is altered by dispersing substances into the air which modify cloud particles.

This process can increase amounts of rain and snow but can also be used to suppress hail and fog.

The substances currently used to seed clouds are chosen to bind to hexagonal ice, but this work suggests that the process could work equally well with materials that bind to other structures.

According to Professor Andrew Hodgson, from the University’s Surface Science Research Centre, “Water is a ubiquitous material that is central to many biological and chemical reactions, but its influence is often indirect and difficult to understand.”

“Water usually takes on hexagonal arrangements, like those seen in snowflakes, yet this research has shown that the intricate, nanoscale structure of ice can actually be built from one-dimensional pentagons,” he said.

“Ice crystals form against flat, solid surfaces and watching the microscopic process take place on copper has provided detailed information on how ice forms at interfaces. The research will help to improve our understanding of how ice patterns form and how water is structured at metal interfaces,” he added.

“Many important chemical reactions take place at interfaces so understanding the structure of water in these environments will allow scientists to make better models of these processes,” said Professor Hodgson.

“With a better understanding of how ice crystals form in the upper atmosphere, new and cheaper materials could now be developed that could be used across the globe to seed clouds and modify weather patterns,” he added. (ANI)

New tool differentiates between man-made and natural nitrogen-oxide pollution

Washington, March 26 (ANI): Scientists have used a new tool to differentiate between man-made and natural nitrogen oxide emissions.

Nitrogen oxides in the atmosphere, which are produced by lightning, biomass burning, and soil outgassing, are converted into atmospheric nitrate through oxidation reactions.

Nitrogen oxide, itself a pollutant, controls the production of ozone, which in turn is a greenhouse gas and a pollutant at ground levels.

Atmospheric nitrate contributes to the load of atmospheric particulate matter and, along with sulfate, to acid rain.

Despite efforts to regulate and monitor emissions, nitrogen oxide and atmospheric nitrate burdens in the atmosphere are increasing in many regions.

To learn more, S. Morin and his team from Institut National des Sciences de l’Univers, CNRS, Grenoble, France, studied the stable isotopic composition of nitrate within aerosol samples.

These samples were collected along a shipborne transect, in the lower atmosphere over the Atlantic Ocean from 65 degrees South to 79 degrees North.

The researchers found that in nonpolar regions, nitrate derived from anthropogenically emitted nitrogen oxide had isotopic properties distinct from locations influenced by natural nitrogen oxide sources.

Further, air masses exposed to snow-covered areas have low nitrogen isotopic ratios, showing that snowpack emissions of nitrogen oxide from upwind regions can have a significant effect on the local surface budget of reactive nitrogen. (ANI)

Mental training games of no use in fight against Alzheimer’s, says expert

Washington, Mar 11 (ANI): People who spend money on brain trainers to keep their mind sharp may get the same benefit from simply doing a crossword, says an expert.

Loss of thinking power is a fear shared by many aging baby boomers. That fear has resulted in a budding industry for brain training products – exercises such as Brain Age, Mindfit and My Brain Trainer.

Some companies like Brain Center International, which produces NeuroActive, promise regular users they’ll shave 10 years of brain aging after eight weeks of use.

However, University of Montreal Professor Sylvie Belleville has warned that there is no scientific evidence to support a range of manufacturers’ claims that the gadgets can help improve memory or prevent Alzheimer’s.

“To my knowledge, there is no scientific research demonstrating results from such recreational programs,” says Sylvie Belleville, a professor at the Université de Montréal’ Department of Psychology and associate research director of the Institut universitaire de gériatrie de Montréal.

According to Belleville, the principles of intellectual stimulation aren’t false, but their efficiency haven’t been scientifically proven. She said that Sudoku and crosswords could work just as well.

According to Belleville, yet there are programs that exist that have been proven to benefit seniors and Alzheimer’s victims.

“These programs are based on memory strategies. They have nothing to do with the repetitive exercises offered by NeuroActive and others,” she said.

While memory products can be helpful, Belleville warns against the unrealistic expectations some may provide.

She stresses that the advertising of these products “could give false hopes. If someone doesn’t see a change they could quit and it could eventually lead to depression.” (ANI)

New mechanism to revolutionise treatment of cancer, viral infections

London, Jan 19 (ANI): In a new research, scientists in Montreal have uncovered a new anti-cancer, anti-infection response control mechanism that could change the way cancers and infectious diseases are treated.

Dr. Andre Veillette, a researcher at the Institut de recherches cliniques de Montréal (IRCM), and his team led by postdoctoral fellow Dr. Mario-Ernesto Cruz-Munoz, identified one of the basic mechanisms controlling NK (“natural killer”) cell activity.

NK cells, which are produced by the immune system, are responsible for recognizing and killing cancer cells and cells infected by viruses, such as viruses causing hepatitis and herpes.

NK cell deficiency is linked with a higher incidence of cancers and serious infections.

“Our breakthrough demonstrates that a molecule known as CRACC, which is present at the surface of NK cells, increases their killer function,” Nature quoted Veillette as saying.

Using mice, the researchers have shown that CRACC greatly improves the animals’ ability to eliminate cancer cells such as melanoma (a skin cancer) and lymphoma (a blood cancer).

Mice lacking the CRACC gene, generated in the laboratory, were found to be more susceptible to cancer persistence. Conversely, stimulation of CRACC function was found to improve cancer cell elimination.

Thus, stimulating CRACC could boost NK cell activity, helping to fight cancers. In addition, it could improve the ability to fight infections, which are also handled by NK cells.

Increasing the activity of CRACC by gene therapy or drugs could become an option in the future to stimulate the killer function of NK cells, and to improve their capacity to destroy cancer and virus-infected cells.

All the above approaches could be used in combination with chemotherapy and radiotherapy to increase the effectiveness of anti-cancer treatments.

The discovery opens new avenues for the treatment of cancers and viral infections.

The study is published in the upcoming issue of the prestigious journal Nature Immunology of Nature Publishing Group. (ANI)

Jupiter-like planets may easily form around twin star systems

Washington, Jan 6 (ANI): In a new study, astronomers have suggested that Jupiter-like planets may easily form around certain types of twin star systems.

A disk of molecules discovered orbiting a pair of twin young suns in the constellation Sagittarius strongly suggests that many such binary systems also host planets.

“We think the molecular gas orbiting these two stars almost literally represents ‘smoking gun’ evidence of recent or possibly ongoing ‘giant’ (Jupiter-like) planet formation around the binary star system,” said astronomer Joel Kastner, professor at Rochester Institute of Technology’s Chester F. Carlson Center for Imaging Science.

Kastner used the 30-meter radiotelescope operated by the Institut de Radio Astronomie Millimetrique (IRAM) to study radio molecular spectra emitted from the vicinity of the two stars in a binary system called V4046 Sgr, which lies about 210 light-years away from our solar system.

The scientists found “in large abundance” raw materials for planet formation around the nearby stars, including circumstellar carbon monoxide and hydrogen cyanide, in the noxious molecular gas cloud.

The young stars, approximately 10 million years old, are close in proximity to each other—only 10 solar diameters apart—and orbit each other once every 2.5 days.

“In this case, the stars are so close together, and the profile of the gas in terms of the types of molecules that are there is so much like the types of gaseous disks that we see around single stars, that it’s a real link between planets forming around single stars and planets forming around double stars,” Kastner said.

Planets that have just formed around young stars like the V4046 Sgr twins might leave leftover gas, a potential clue for astronomers who hunt planets.

Kastner is now encouraging other scientists to look closely at V4046 Sgr to see if planets are forming around them.

“We really don’t have any idea right now about what kinds of planets form around double stars or even if planets can form around double stars,” Kastner said.

“It’s not something that’s established. It’s theoretically possible, but I’m not aware of a single observation yet of a planet orbiting a double star. I hope someone will go looking soon, if they haven’t already, around V4046 Sagittarius,” he added. (ANI)