Tuesday October 23, 2018
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New Technology Developed to Study Marine Life

The patch called Marine Skin is based on stretchable silicone elastomers that can withstand twisting, shearing and stretching, even when exposed to high pressures in deep waters.

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Their long-term aim is to achieve reliable performance when Marine Skin is attached for up to a year on individual animals of diverse types.
Marine Life, Wikimedia Commons
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Scientists have developed a thin smart patch that can withstand twisting, shearing and stretching, even when exposed to high pressures in deep waters and could make studying the behaviour of marine animals easier and more informative.

The patch called Marine Skin is based on stretchable silicone elastomers that can withstand twisting, shearing and stretching, even when exposed to high pressures in deep waters.

“The integrated flexible electronics can track an animal’s movement and diving behaviour and the health of the surrounding marine environment in real time,” said Joanna Nassarm, who was a PhD student in the King Abdullah University of Science and Technology (KAUST) in Saudi Arabia at the time of the research.

Read also: Robot-assisted Tumour Surgery Performed for the First Time in India

Being able to monitor and record a range of environmental parameters is vital in the study of marine ecosystems. Yet existing systems for tracking animals in the sea are bulky and uncomfortable for animals to wear.

Marine Skin has been tested and demonstrated when glued onto a swimming crab, Portunus pelagicus, but is suitable for tagging a wide range of sea creatures.
Marine Life under study by use of Technology, Wikimedia Commons

“Using simple design tricks and soft materials, we were able to beat the current standard systems in terms of non-invasiveness, weight, operational lifetime and speed of operation,” said Nassar, who is now at California Institute of Technology in the US.

“In the current prototype, the location data is supplemented by recordings of water temperature and salinity. Additional sensing capabilities could be added in future,” he said.

“Possibilities include sensing the physiological state of the tagged animals. This would allow information about ocean chemistry to be correlated with the heath and activity of even small animals as they move around in their habitat,” he added.

The data is currently retrieved via wireless connection when the tag is removed. In future, the researchers hope to develop remote data retrieval procedures by overcoming the problems of transmitting signals through water.

Marine Skin has been tested and demonstrated when glued onto a swimming crab, Portunus pelagicus, but is suitable for tagging a wide range of sea creatures.

The team plans to move on to studies with dolphins and whale sharks. Their long-term aim is to achieve reliable performance when Marine Skin is attached for up to a year on individual animals of diverse types. (IANS)

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350 Chinese Cities Get Better Air Quality

In the first three quarters of this year, 7 out of 20 cities with the worst air quality were in northern Shanxi province

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Officials told CNN that the Chinese military did not intercept the US aircraft during their mission.
South China Sea, Pixabay

More than half of China’s cities saw air quality improve year-on-year in September, the Chinese Environment Ministry has said.

The average density of PM 2.5 stood at 25 micrograms per cubic meter in September in 338 cities, down 16.7 per cent from the same period last year, according to the Ministry of Ecology and Environment.

These cities enjoyed good air quality on 90.8 per cent of the days last month, up 2.6 per cent, Xinhua news agency said.

Air Quality
Air pollution can also damage your kidneys. wikimedia commons

The world’s most populous nation has over 600 cities and is grappling with chronic pollution which kills about one million people annually.

China is the world’s biggest coal producer and alone burns half of it, leading to severe pollution. The country is also the largest greenhouse gas emitter in the world.

However, the government has cracked down heavily on the polluting industries, shutting many of them. In July, the government released a three-year action plan to tackle the problem.

It also punishes top officials for not doing enough to rein in pollution.

Beijing is no longer the world’s most polluted city.

Air quality

Air quality
Buildings are seen on a hazy day in Xiangyang, Hubei province, China. VOA.

In the Beijing-Tianjin-Hebei region, the share of days with good air quality in September stood at 79.2 per cent, a year-on-year increase of 27.8 percentage points, while the PM 2.5 density of the region dropped by 33.3 per cent on year to 36 micrograms per cubic meter, the Ministry was quoted by Xinhua as saying.

In the first three quarters of this year, 7 out of 20 cities with the worst air quality were in northern Shanxi province, China’s coal-producing hub.

Also Read: Sundar Pichai Clears Google’s China Centric Plans

According to the action plan released in July, by 2020, emissions of sulfur dioxide and nitrogen oxide should have dropped by more than 15 per cent over the 2015 levels, while cities that fail to meet the requirement of PM 2.5 density should see a decline of more than 18 per cent from 2015 levels. (IANS)