Tag: "metal" at biology news
Metal ions may play big role in how we sense smells
...ell." Knowing that molecules that bind strongly to metal
ions usually smell strongly (and often badly), Sus...ptors are metalloproteins (proteins that contain a metal
ion as part of their structure). Inorganic chemists have long suspected that the olfactory system i...
Leatherback sea turtles careening towards extinction
...EDs) in U.S. and Mexican trawl fisheries. TEDs are metal
grids placed in the backs of trawl nets that allow the turtles to slip out of harm's way instead of being entrapped in the net, then drowning. Since the implementation of these efforts in the late 1980's, Kemp's ridleys have been increasing 11-13% pe...
Marine biologists probe 'black box' mysteries of the sea
...h version of the dynamometer that will replace the metal
spring with an electronic sensor that continuously transmits wave force data back to the lab. He and his colleagues also are using nickel-size computers called I-Buttons that record the body temperature of shoreline organisms every 10 minutes over a ...
Researchers develop 'natural bandages' that mimic body's healing process
...n attached to a nozzle, which is then pointed at a metal
target. An electric field is created between the nozzle and the target, and it is gradually increased until the force of the electric field overcomes the surface tension of the solution. This forms a liquid jet that is transformed into a dry fiber be...
US researchers find first conclusive evidence that lead is linked to male infertility
...ns, undertook a prospective, double-blind study of metal
ion levels and sperm function in semen from the pa...gaged in occupations likely to produce exposure to metal
ions. High lead levels in up to 29 of the IVF patients were associated with smoking and/or alcohol c...
First step along possible new avenue of cancer research reported
...ne in a manner not too dissimilar from the way the metal
ribs buttress an umbrella. The Georgetown researchers observed that mice with malfunctioning beta-spectrin genes had many defects in the embryonic development of the heart, brain and other organs. Surprisingly, they found that abnormalities in the ...
Jefferson Lab experiment generates THz radiation 20,000 times brighter than anyone else
...ght they are, terahertz light rays can't penetrate metal
or water. So they can't be used to inspect cargo containers on arriving ships or to diagnose conditions deep inside the human body."Nevertheless," says Williams, "the growing awareness of terahertz light's usefulness is like what happened a century a...
Effects of rare, devastating disease linked to shrinking of cells' telomeres
...the ends of linear chromosomes like the plastic or metal
ends of shoelaces. They are made by the cell using an enzyme called telomerase. The telomeres enable the cell to reproduce the ends of the chromosomes during cell division (chromosomes contain the DNA blueprints of the cell). But over time, repeated ...
The jaws stiffness found to dictate speech production
...puter-controlled robotic device to an acrylic and metal
dental appliance that was attached to the mandibular teeth. The appliance was custom molded for each subject and glued to the buccal surface of the teeth using a dental adhesive. The coupling between the robot and the jaw was achieved by using a magn...
Rice develops nanosensor for precision chemical analysis
...d capitalizes on the tunable optical properties of metal
nanoshells, a novel type of nanoparticle invented ...e by placing the sample next to small particles of metal
called colloids. Scientists have even observed single molecules with this method, but they have neve...
Without water, the body will shut down its need to ingest food
...or long infusions, the tubing was protected with a metal
spring and was connected through a low-friction watertight fluid swivel. Five experiments were then conducted as follows: Experiment 1: Analysis of feeding during water deprivation. Food intake was measured in 11 rats for 7.5 hours, starting at the ...
Nanoparticles could aid biohazard detection, computer industry
...circuits that are far smaller than those made from metal
wires. But for an impulse from a keyboard or mouse...und in nature as part of low-purity compounds like metal
salts -- which, despite their name, are not salts you would use to flavor food or make a snowy roadw...
Lab engineers develop microelectronics for artificial retina project
...said. "We've developed a technique for fabricating metal
lines that can be stretched. This is really critical for a flexible device designed to conform to the shape of the retina." The electronic array must be robust enough to withstand damage from the implant procedure and be biocompatible -- able to wit...
Revolutionary new theory for origins of life on Earth
...ust at the ocean floor, it reacted inside the tiny metal
sulphide cavities. They provided the right microenvironment for chemical reactions to take place. That kept the building blocks of life concentrated at the site where they were formed rather than diffusing away into the ocean. The iron sulphide ce...
Study shows first direct evidence that transplanted muscle cells can take root in damaged hearts
...ing power, by feeding blood into a battery-powered metal
pump and out through a tube connected to the main artery. UMHS teams have implanted more than 100 patients with a type of LVAD called a Heartmate in the past six years. When the patient got a heart transplant, the old heart was removed and sent for ...
Telerobotic equipment aids in cleanup activities
... tasks. The current focus is plasma arc cutting of metal
structures to dismantle contaminated equipment. Testing of the equipment comes during a time when there is an increasing need for remote systems and robotics for cleanup of DOE facilities....
Coils slash death/disabilty from brain aneurysms
...neurysms, requires opening the skull and placing a metal
clip across the neck of the aneurysm to stop the bleeding. In coiling, a catheter is inserted through an artery in the leg up into the brain to fill the aneurysm there with tiny platinum coils. The coils are like "miniature slinkies that are folded...
Genome of potential bioremediation agent sequenced
...borators elsewhere have deciphered the genome of a metal
ion-reducing bacterium, Shewanella oneidensis, tha...st microbe we have sequenced that can function for metal
bioremediation and also survive in both aerobic and oxygen-free environments." Heidelberg is the fir...
Imaging apparatus characterizes drops in 'dirty' laboratory environments
...r optimized conditions, up to 99.99 percent of the metal
ions in a waste stream can be scavenged in the combustor. "That kind of efficiency would be great for most applications, but it's not good enough when dealing with radioactive waste," said Alexander Scheeline, a professor of chemistry at Illinois. "...
Water world: The sequel
...ion movies starring individual watermolecules on a metal
surface. The ending was a surprise even to theproducers. Working with a unique scanning tunneling microscope (STM), a team led by Miquel Salmeron, a physicist with Berkeley Lab's Materials SciencesDivision, cooled the surface of a single crystal of ...
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