Knowledge Update

​London, June 6 (IANS) Women as well as young adults are twice as likely to experience anxiety as men, a new study says.

Anxiety disorder -- the most common mental health problems -- is often manifest as excessive worry, fear and a tendency to avoid potentially stressful situations including social gatherings.

"Anxiety disorders can make life extremely difficult for some people and it is important for our health services to understand how common they are and which groups of people are at greatest risk," said led author Olivia Remes at the University of Cambridge.

The findings showed that nearly one in ten adults (10.9 per cent) with heart disease were affected by generalised anxiety disorder but women were almost twice as likely to be affected as men.

Also, women affected with heart diseases, cancer and even pregnancy showed a higher level of anxiety than men. 

Obsessive compulsive disorder (OCD) -- an anxiety disorder characterised by obsessions and compulsions -- was in general, found only one in a hundred, but the proportion with the disorder was double in pregnant women and slightly higher in the period immediately after birth.

"Anxiety disorders can also lead to impairment, disability, and risk of suicide," added Louise Lafortune, research associate at the University of Cambridge.

Further, the level of anxiety among young individuals -- both male and female -- under 35 years of age were found to be disproportionate.

In addition, people from Western Europe and North America were found more likely to suffer from anxiety than people from other cultures.

"By collecting all these data together, we see that these disorders are common across all groups, but women and young people are disproportionately affected. Also, people who have a chronic health condition are at a particular risk, adding a double burden on their lives," Remes noted.

For the study, published in the journal Brain and Behaviour, the team studied 48 scientific reviews that showed data between 1990 and 2010.

The overall proportion of people affected remained largely unchanged, with around four out of every 100 experiencing anxiety.​

Dubai, June 7 (IANS) US tech giant IBM on Tuesday announced that it has signed a 10-year technology services agreement with Emirates airline worth $300 million.

IBM and Dubai's government-controlled Emirates said in a joint statement that the American firm will provide IT infrastructure as a service, allowing the airline to improve

​London, June 6 (IANS) Finnish scientists have recovered important metals -- lithium, cobalt and nickel -- from battery waste with nearly 100 per cent purity.

Recovered metals could be used in the manufacture of batteries, and in the future especially in batteries of electric vehicles.

Researchers from Lappeenranta University of Technology (LUT) were able to extract cobalt at 99.6 per cent purity, nickel at 99.7 per cent purity, and lithium at 99.9 per cent purity from battery waste. 

"The manufacturing of new batteries requires metals of particularly high purity. If the purity of lithium is below 99.5 per cent, it is not suitable as raw material for batteries. In other words, the difference between 99.4 per cent and 99.9 per cent purity is very significant," said one of the researchers Sami Virolainen.

The findings were presented at the 'Circular Materials' conference organised by Chalmers University of Technology in Gothenburg, Sweden.

Lithium and cobalt are increasing in importance because they are needed in batteries of electronic devices and especially in electric cars. 

Forecasts indicate that the global need for lithium may quadruple between the years 2011 and 2025. 

The study separated metals through a liquid-liquid extraction process on a pilot scale. In the process, extraction takes place between two liquid phases which do not dissolve in each other. 

All other impurities are separated from the solution, leaving only lithium, cobalt and nickel. 

Previous studies have attempted to extract all three metals, but have only succeeded in extracting two at a relatively high purity and the third with low purity, the study said.

"As a separation process, liquid-liquid extraction is a viable option when nearly 100 per cent purity and a high recovery rate are required," Virolainen noted.​

​Washington, June 6 (IANS) Using 29 years of data from satellite imageries, NASA scientists have found extensive greening in the Arctic region, thanks to rising temperatures.

The northern reaches of North America are getting greener, said the study that provides the most detailed look yet at plant life across Alaska and Canada. 

In a changing climate, almost a third of the land cover -- much of it Arctic tundra -- is looking more like landscapes found in warmer ecosystems, the researchers said.

With 87,000 images taken from Landsat satellites, the researchers found that western Alaska, Quebec and other regions became greener between 1984 and 2012. 

Landsat is a joint NASA/US Geological Survey programme that provides the longest continuous space-based record of the Earth's land vegetation in existence.

"It shows the climate impact on vegetation in the high latitudes," said one of the researchers Jeffrey Masek from NASA's Goddard Space Flight Center in Greenbelt, Maryland. 

Temperatures are warming fast in the Arctic which has led to longer seasons for plants to grow in and changes to the soils. 

Overall, the scientists found that 29.4 percent of the region greened up, especially in shrublands and sparsely vegetated areas, while 2.9 percent showed vegetation decline.

The findings were reported in the journal Remote Sensing of Environment.

Landsat, like other satellite missions, can use the amount of visible and near-infrared light reflected by the green, leafy vegetation of grasses, shrubs and trees to characterize the vegetation. 

Then, with computer programs that track each individual pixel of data over time, researchers can see if an area is greening -- if more vegetation is growing, or if individual plants are getting larger and leafier. 

If, however, the vegetation becomes sparser, the scientists would classify that area as browning.​

​New York, June 6 (IANS) Galaxies "waste" large quantities of heavy elements generated by star formation by ejecting them up to a million light years away into their surrounding halos and deep space, says a study.

More oxygen, carbon and iron atoms exist in the sprawling, gaseous halos outside of galaxies than exist within the galaxies themselves, leaving the galaxies deprived of raw materials needed to build stars and planets, the findings showed.

"Previously, we thought that these heavier elements would be recycled into future generations of stars and contribute to building planetary systems," said lead author of the study Benjamin Oppenheimer from University of Colorado Boulder (CU-Boulder) in the US.

"As it turns out, galaxies are not very good at recycling," Oppenheimer pointed out.

The near-invisible reservoir of gas that surrounds a galaxy, known as the circumgalactic medium (CGM), is thought to play a central role in cycling elements in and out of the galaxy, but the exact mechanisms of this relationship remain elusive. 

A typical galaxy ranges in size from 30,000 to 100,000 light years while the CGM can span up to a million light years.

The researchers used data from the Cosmic Origin Spectrograph (COS), a $70 million instrument designed at CU-Boulder and built by Colorado-based Ball Aerospace Technology Corp, to study the composition of the CGM.

The instrument is installed on NASA's Hubble Space Telescope and uses ultraviolet spectroscopy to study the evolution of the universe.

After running a series of simulations, the researchers found that the CGMs in both spiral and elliptical galaxies contained more than half of a galaxy's heavier elements, suggesting that galaxies are not as efficient at retaining their raw materials as previously thought.

The findings appeared in the journal Monthly Notices of the Royal Astronomical Society.​

​Beijing, June 5 (IANS) Nestle and Alibaba on Sunday announced plans to upgrade their partnership. The world's largest food retailer will launch its biggest e-commerce campaign ever with its diverse products, spanning 30 brands from coffee to baby formula, being sold on Alibaba's expansive e-commerce platforms such as Tmall, Xinhua reported. "Our partnership with Alibaba is all about the consumer. What is so exciting about China as a market is not only its size or population, but that Chinese consumers are a step ahead of consumers in other markets in the digital way they consume," Wan Ling Martello, executive vice president with Nestle overseeing the Asian, Oceanian and African markets, said in a conference marking the company's 150-year anniversary. China is the right place to start Nestle's next 150-year growth story as Chinese consumers have a more developed understanding and are quicker to adopt new consumption technologies than their global peers and have great passion for innovation, she added. China's consumption pattern and manner have evolved fast and consumption is becoming increasingly digital with more young consumers choosing to shop online, said Zhang Yong, Alibaba CEO. The volume of online purchases surged by more than 12 times from January 2011 to April 2016 in China, while per capita consumption grew by 27 percent, according to a joint report released by Alibaba's financial services platform Ant Financial and a private economics research institute. Nestle strengthened its global capabilities in e-commerce by signing a strategic cooperation partnership with Alibaba in late 2015 to increase its online sales and build its brands. In 2015, half of Nestle's sales in China were online.​

New York, June 5 (IANS) Exercise could offer a simple and inexpensive way to reduce weakness, numbness and pain in hands and feet due to chemotherapy, new research has found.

The study, involving more than 300 cancer patients, directly compared the neuropathic symptoms in non-exercisers to the pain among patients who took part in a specialized six-week walking routine with gentle, resistance-band training at home.

The exercisers reported significantly fewer symptoms of neuropathy - which includes shooting or burning pain, tingling, numbness, and sensitivity to cold - and the effects of exercise seemed to be most beneficial for older patients, said lead author Ian Kleckner, from University of Rochester Wilmot Cancer Institute in the US.

The findings are scheduled to be presented at the American Society of Clinical Oncology (ASCO) annual meeting 2016 in Chicago.

Not all chemotherapy drugs cause neuropathy, but 60 per cent of people with breast cancer and other solid tumours who receive taxanes, vinca alkaloids, and platinum-based chemotherapies will likely suffer this type of side effect, Kleckner said.

Neuropathy is more commonly associated with diabetes or nerve damage. No US Food and Drug Administration-approved drugs are available to prevent or treat chemotherapy-induced neuropathy, he added.

"Exercise is like a sledgehammer because it affects so many biological and psycho-social pathways at the same time - brain circuitry, inflammation, our social interactions - whereas drugs usually have a specific target," Kleckner said.​

Washington, June 5 (IANS) Mental illnesses and mood disorders are more common in urban areas partly due to reduced access to nature, say researchers.

"There's an enormous amount of disease largely tied to our removal from the natural environment," said Peter Kahn, Professor at University of Washington.

In a perspective piece published in the journal Science, the authors discussed the growing tension between an arguably necessary role urban areas play in society and the numbing, even debilitating, aspects of cities that disconnect humans from the natural world.

"Kids in large cities are growing up having never seen the stars. Can you imagine that -- having never in your life walked under the vastness of the star-lit sky, and there's that feeling of awe, restoration and imaginative spark?" Kahn said.

"As we build bigger cities, we're not aware how much and how fast we're undermining our connection to nature, and more wild nature -- the wellspring of our existence," he pointed out.

In the article, Kahn, and co-author Terry Hartig at Uppsala University in Sweden, pointed to research that shows the emotional and mental strain cities can have on people.

"I'm willing to say there's a naturalness we can achieve in cities, but not at the scale we're building or at the scale we're headed with many cities," Kahn said.

"There's nothing natural about a megacity," he noted.

There are steps cities can take to introduce nature into the urban core, including requiring buildings to have windows that open to allow in fresh air and natural light; incorporating more rooftop gardens and urban agriculture; and creating spaces within and around buildings to touch, see and smell native plants.

But these remedies first require an appreciation for nature in urban centres, as well as the space, resources and collective will to make these changes.

Kahn argues that it is more than just introducing nature into urban areas.

People must be able to interact with these elements using more of their senses in order to experience physical and psychological benefits of nature, as well as to shift the collective baseline toward better understanding and appreciation of the natural world.

For example, looking at an office plant on the windowsill might be soothing, but having a place to sit in the grass on a lunch break and perhaps even sink one's feet into the soil are sensory experiences that can deepen a person's engagement with nature.

Thoughtfully designed cities with nature can offer both the stimulation and energy of an urban area and meaningful interaction with a psychologically restorative natural environment.

"Thus, cities designed well, with nature in mind and at hand, can be understood as natural, supportive of both ecosystem integrity and public health," the authors noted.​

London, June 5 (IANS) Researchers have discovered that two neurons in the brain hold the key to explaining how complex behavioural decisions are made.

In this study, scientists monitored the snails' behaviour while they made decisions in their search for food.

"Our study reveals for the first time how just two neurons can create a mechanism in an animal's brain which drives and optimises complex decision making tasks," said lead researchers George Kemenes, Professor at the University of Sussex in Britain.

They then measured the activity in the snail's brain by using electrodes to record small electrical changes, called action potentials, in individual neurons.

The results showed a controller type neuron which lets the snail's brain know potential food is present and a second neuron which transmits signals telling the snail's brain what it's motivational state is, i.e., whether it's hungry or not.

Also, the system created by the neurons was found to enable the snails to save energy by reducing brain activity when food is not available.

"The findings can help scientists to identify other core neuronal systems which underlie similar decision making processes," Kemenes added in the paper published in the journal Nature Communications.

"The study will eventually help us design the 'brains' of robots based on the principle of using the fewest possible components necessary to perform complex tasks," Kemenes concluded.​

​London, June 5 (IANS) A team of researchers has devised a new method for stacking microscopic marbles into regular layers, producing intriguing materials which scatter light into intense colours and which change colour when twisted or stretched.

The team, led by the University of Cambridge, used a new method called Bend-Induced-Oscillatory-Shearing (BIOS) to produce hundreds of metres of these materials, known as 'polymer opals', on a roll-to-roll process.

The results, reported in the journal Nature Communications, has allowed such sheets to be manufactured on industrial scale, opening up applications ranging from smart clothing for people or buildings, to banknote security.

Some of the brightest colours in nature can be found in opal gemstones, butterfly wings and beetles. These materials get their colour from the systematically-ordered microstructures they contain.

When stretched, the material shifts into the blue range of the spectrum and when compressed, the colour shifts towards red. When released, the material returns to its original colour.

"Finding a way to coax objects a billionth of a metre across into perfect formation over kilometre scales is a miracle," said Professor Jeremy Baumberg, the paper's senior author.

"It is wonderful to finally understand the secrets of these attractive films," said PhD student Qibin Zhao, the paper's lead author.​