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Tag: "meter" at biology news

Duke Chemists Isolating Individual Molecules Of Toxic Protein In Alzheimer's, Parkinson's Disease

...ts of amyloid fibrils measure only billionths of a meter and are floating in a disordered mix, "the initial stages of amyloid aggregation are not fully understood," he said. "When you start a normal reaction, molecules are free in solution so they interact with each other randomly," Akhremitchev said. "If...

Transgenic plants remove more selenium from polluted soil than wild plants, new tests show

...control plants were transplanted into four 33-by-1 meter field plots, two that contained contaminated sediment from the San Luis Drain and two that contained clean soil. One line of Indian mustard plants was engineered to produce more of the enzyme adenosine triphosphate sulfurylase (APS). The enzyme is k...

Molecular messengers perform a crucial role in the ability of injured nerve cells to heal themselves

...alled an axon, which in humans can reach up to one meter in length. Nerve cells belonging to the peripheral nervous system can regrow when their axons are damaged. But how does the damaged axon inform the cell body that it must start producing vital proteins for the healing? That's precisely where the mole...

Team Invents Device For Weighing Individual Molecules

...ponent is significantly less than a millionth of a meter in width. The Caltech devices are "nanoelectromechanical resonators"--essentially tiny tuning forks about a micron in length and a hundred or so nanometers wide that have a very specific frequency at which they vibrate when excited. Just as a bronze...

The making and breaking of microtubules

...crotubule extends rapidly for many millionths of a meter before suddenly switching off and shrinking again. Nucleotides like GTP are best known as units of the nucleic acids DNA and RNA, consisting of a base (a letter in the genetic code) plus a sugar and three phosphate groups. But these molecules also r...

Revueltosaurus skeleton unearthed at Petrified Forest upsets dinosaur tale

...complete Revueltosaurus skeleton from the 6-square meter quarry they dug, plus bones from more than a dozen other individuals. In June of 2005, a second relatively complete skeleton was uncovered from the same site. Irmis, who first started working in the park with Parker in 2002 as an undergraduate at No...

Agilent Technologies introduces high-capacity human protein removal system for proteomics research

...complete Revueltosaurus skeleton from the 6-square meter quarry they dug, plus bones from more than a dozen other individuals. In June of 2005, a second relatively complete skeleton was uncovered from the same site. Irmis, who first started working in the park with Parker in 2002 as an undergraduate at No...

It's electric: Cows show promise as powerplants

...was placed in each chamber. The researchers used a meter to measure the output of the fuel cell. That output reached a consistent maximum of 0.58 volts. After about four days, the voltage fell to around 0.2 volts, at which time the researchers added fresh cellulose to bring the voltage back up to a higher...

Researchers use 3-D imaging system to unveil swimming behavior of microscopic plankton

...lankton are found under the surface of each square meter of the world's oceans. These animals play a key role in the marine food web as a crucial link between primary producers and predators. The imaging system, Fish TV, uses multibeam sonar to uniquely measure animal movement. The system allowed the rese...

Beetle-inspired switch uses water for bonding

... hundreds of nanometers, close to a billionth of a meter and one-tenth the size of the beetle droplets, is within reach. Researchers could also create large effects from many tiny switches by connecting them in various arrangements, Steen said. "This new technology bridges the gap between scales as large...

'Sinkers' provide missing piece in deep-sea puzzle

...ilter traps coarse particles, and can be up to one meter (three feet) across. The inner filter is slightly ...age of about four sinkers per day for every square meter of deep seafloor. In other words, a patch of seafloor the size of a large dinner plate might receive...

Clear rules needed to govern deep sea bioprospecting: UNU

...versity is known to be as high as 1,000 per square meter in the Indo-Pacific Ocean. Significantly, the ratio of potentially useful natural compounds is higher in marine than terrestrial organisms. There is, therefore, a higher probability of commercial success with marine-sourced material. The odds of succ...

A Father’s Day Gift: Free DNA Paternity Testing

...versity is known to be as high as 1,000 per square meter in the Indo-Pacific Ocean. Significantly, the ratio of potentially useful natural compounds is higher in marine than terrestrial organisms. There is, therefore, a higher probability of commercial success with marine-sourced material. The odds of succ...

Researchers Create DNA-Based Sensors for Nano-Tongues and Nano-Noses

...ors each carbon nanotube is about a billionth of a meter wide, Johnson and his colleagues believe arrays of these sensors could serve as passive detection systems in almost any location. The sensor surface is also self-regenerating, with each sensor lasting for more than 50 exposures to the targeted substa...

Why Christmas trees are not extinct

...tree valves ?on the scale of one 10-millionth of a meter versus one billionth of a meter. The bottom line is that conifers have shorter conduits and fewer valves, both of which would increase resistance to water flow, "but they compensate for that because each individual valve is so much more efficient,"...

DNA self-assembly used to mass-produce patterned nanostructures

...s to create grids less than one ten-millionth of a meter square. The smallest features on these square DNA ...tices are approximately five to 10 billionths of a meter (nanometers), according to the scientists, compared with about 65 nanometers in silicon circuits cre...

Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer

...ix: "nano," connoting their size, a billionth of a meter or roughly 25-millionth of an inch. Today, cancer researchers are exploring the potential of such nanostructures to exquisitely target cancer cells without harming surrounding tissue, and to image the formation of tumors long before they have a cha...

Underlying cause of massive pinyon pine die-off revealed

...olleagues measured soil moisture on the 100-by-150 meter plot (about three times the size of a football field). Temperature and precipitation data were recorded at a nearby site. In 1992, the team began tracking tree mortality. "I could see the plot from my office window," said Breshears, who used to work...

Marathon of nano-sprinters

.... The length of axons is in the centimeter or even meter range; examples of relatively long axons are those that connect our spinal cord with the tips of our fingers and toes. Within such an axon, microtubules provide the tracks along which molecular motors transport their cargo, such as vesicles filled wi...

Research: Snails were overlooked contributors to marsh destruction

...treme densities" of 400 to 2,000 snails per square meter (about 10 square feet) on the borders between healthy and dying marsh. Those numbers compared to almost no snails on exposed grassless mud flats, and far fewer snails in healthy marsh set back from the die-off border. The researchers also removed sn...

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