World’s most advanced CT scanner to see through solids

Washington, September 11 (ANI): Researchers at The University of Nottingham, UK, have created the most advanced 3D X-ray micro Computed Tomography (CT) scanner in the world, which will help scientists from a wide variety of departments across the University literally see through solid materials, including soil.

Known as the ‘Nanotom’, the machine will make previously difficult and laborious research much easier as it allows researchers to probe inside objects without having to break into them.

The Nanotom will produce high-resolution 3D and slice images of solids with a pixel resolution of up to half micron or 500 nanometres.

It will be based at the School of Biosciences as the centrepiece of research into efforts to understand the microscopic interactions between plant root growth and soil structure.

The first project to use it will examine the sensing ability of roots to grow in the best direction for the health of the plant through the soil.

It aims to provide evidence of how the root reacts and adapts to soil stresses like drought and compaction by adjusting the genetic information in the tips of the root as it grows.

The Nanotom will allow researchers to follow the progress of the root growth and soil structural development for the first time without disturbing the sample of the plant growing in the soil.

The eventual aim of research like this is to contribute to worldwide efforts for food security and sustainable food production by preserving and improving the vital but finite soil resources of the planet.

It will enable scientists to come up with a recipe for the best soil composition and level of compaction as well as informing plant breeding programmes.

Accurate soil structure measurement will be also be essential in changing farming practices to cut CO2 which is released into the atmosphere during traditional ploughing of agricultural soil.

According to Dr Sacha Mooney from the University’s Division of Agricultural and Environmental Sciences, “This new kit will completely revolutionize our work in trying to understand the key factors that control some of the many functions that soils perform.”

“Of course it’s not just soils we’ll be scanning, I think I am just as excited about the opportunity to look inside newly created environmental building materials, eco-friendly crops developed to improve yield and even chocolate bars for the food industry,” Mooney added. (ANI)

Ear analysis suggests Archaeopteryx was more birdlike than reptilian

Washington, Jan 14 (ANI): A new research has suggested that the earliest known bird, Archaeopteryx, had a similar hearing range to the modern emu, which suggests that the 145 million-year-old creature, despite its reptilian teeth and long tail, was more birdlike than reptilian.

The research was done by a team of paleontologists and biologists from London, Munich and Ohio.

Using innovative modern technology, the team has shown for the first time how the length of the inner ear of birds and reptiles can be used to accurately predict their hearing ability and even aspects of their behavior.

“In modern living reptiles and birds, we found that the length of the bony canal containing the sensory tissue of the inner ear is strongly related to their hearing ability,” said study co-author Paul Barrett, a palaeontologist at London’s Natural History Museum.

“We were then able to use these results to predict how extinct birds and reptiles may have heard and found that Archaeopteryx had an average hearing range of approximately 2000 Hz. This means it had similar hearing to modern emus, which have some of the most limited hearing ranges of modern birds,” he added.

Researchers previously have only been able to estimate how prehistoric animals heard by examining the skulls of damaged fossils and relating brain region size to hearing ability, based on comparisons to the animals’ modern relatives.

Computed tomography or CT imaging, however, allowed the team to accurately reconstruct the inner ear anatomy of various intact bird and reptile specimens.

Fifty-nine species were studied, including turtles, crocodiles, snakes and birds.

“By examining the three dimensional CT scans we were able to see for the first time the real relationship between hearing ability and behavior in extinct reptiles and birds,” said Stig Walsh, Natural History Museum palaeontologist and lead author on the study.

“The size of the cochlea duct (the bony part of the inner ear housing the hearing organ) in living birds and reptiles accurately predicts the hearing ranges of these animals. This simple measurement can therefore provide a direct means for determining hearing capabilities, and possibly behavior, in their extinct relatives, including Archaeopteryx,” he added.

According to Angela Milner, also from the Natural History Museum, “Our previous research has shown that the part of the ear that controls balance was just like that of modern birds, and now we know that Archaeopteryx had bird-like hearing too.” (ANI)