Tag: "rods" at biology news
Nerve cells 'guided' to repair spinal damage: Technique
...omaterials, involves imbedding a series of fibrous rods
into a gel substance and then dissolving the rods, leaving a series of longitudinal channels. These channels are then injected with peptides, molecules that stimulate cell adhesion and migration. "When nerve cells are placed at the opening of the cha...
RNA could form building blocks for nanomachines
...ble into 3-D shapes resembling spirals, triangles, rods
and hairpins, the group has found what could be a ...ate structures can in turn be constructed, such as rods
gathered into spindly, many-pronged bundles. These structures could theoretically form the scaffoldi...
Toxin combo common in fish appears capable of impairing motor skills
...ntrol animals. However, on the rotating rods
the impact of exposure to both PCBs and methylmercury became clear. As the speed of the rods
exceeded 25 rpm, the pups, regardless of sex, that were exposed to both toxicants during their mothe...
Fuel-cell microbes' double duty: treat water, make energy
...aper," said Logan. "We can't afford touse graphite rods
on the anodes, Nafion as the protonexchangemembrane, and platinum on the carbon cathode. But we're alreadymaking progress on that. Substantially cheaper systems are justaround the corner." Meanwhile, amid the slime on the anodes, countless and vari...
Stem cells delivered into back of eye hold promise for people with retinitis pigmentosa
...ntain a number of specialized cells, including the rods
and cones, which capture light and send electrical...ease, the outer layer of the retina containing the rods
and cones as well as other neuronal layers degenerate within a few weeks after birth. Most of the ce...
Researchers detect receptor for day/night cycles
...rofessor emeritus in zoology at U of T. When these rods
and cones degenerate, mammals and animals become b...d to other opsins [a type of protein] found in the rods
and cones of the outer retina." In their study, the researchers deleted melanopsin from the inner re...
Body's internal clock is set by newly discovered light detection system in the eye
...uite different from the opsin proteins used in the rods
and cones of the eye. The team also found that mel...ou can understand why - for the past 100 years the rods
and cones were thought to be the only light sensing cells within the eye, so you can imagine how ple...
At last: Just three cell types detect light in the eye
...y, the traditional way to prevent information from rods
and cones -- also the eye's vision-producing cells -- was by using a mouse model in which rods
and cones degenerate. "We wanted to avoid the uncertainty of the traditional 'rod-less, cone-less' ...
Scientists observe nanosize microtubules 'treadmilling' across plant cells
... Found in all plant and animal cells, these hollow rods
of protein assemble spontaneously and carry out a number of important functions. Some act as miniature girders that support the cell, while others form tracks that transport vital cellular cargo or guide the separation of chromosomes during cell divi...
B-vitamins prove effective in relieving chronic pain
... produced by surgically implanting stainless steel rods
unilaterally into the intervertebral foramen at L4 and L5 as we previously described. In brief, the rats were anesthetized with sodium pentobarbital (40mg/kg, i.p.), the paraspinal muscles were separated from the mammillary and transverse processes ...
Hydroxyurea therapy improves survival in most severely affected sickle cell patients
...ckle hemoglobin stick to one another, forming long rods
inside red blood cells and causing these cells to take on a sickle shape and become rigid. The sickled red cells are unable to squeeze through tiny blood vessels, depriving tissue of an adequate blood supply and causing painful episodes....
The human eye can self-correct some optical faults
... retina, where millions of photoreceptor cones and rods
line the rear surface of the eye. As the light rays are reflected back through the internal optics and exit the eye, the wavefront analyzer measures and computes deviations from a perfectly formed light beam or test pattern a short distance in fron...
High-density storage of nuclear waste heightens terrorism risks
...y pack four to five times the number of spent fuel rods
into water-cooled tanks than the tanks were design...plant operators deal with the narrow, 12-foot-long rods
of uranium that, after three or four years of use, no longer contain enough chain-reacting material ...
Polymers promote nerve regeneration
...versity, uses chip technology to replace the eye's rods
and cones. The technology transfers the digital images to the optic nerve via electrodes, but is limited by the inability to create electrodes that are small enough and numerous enough to create a resolution sufficient for the brain to decipher the i...
Study shows how eye cells die when exposed to lead
...or of the study. "The human eye contains so many rods
that you can lose about 20 percent of them and not... truck drivers, or for people who are losing their rods
due to disease or injury, finding a way to prevent the rods
from dying is important." In June 2002, ...
Eye's light-detection system revealed
...e eye. "This tiny group of cells, together with rods
and cones, are the bulk of the eye's mechanisms fo... system and complement the light-detecting role of rods
and cones, which also convey information about the color, shape and movement of objects. "Rods and...
Researchers identify key pathway in the pupils response to light
...main types of photoreceptor cells in the retina -- rods
and cones -- as well as proteins in the retina cal...says Van Gelder. He says scientists believed that rods
and cones in the retina are similar to film in a camera. Light enters through the cornea, is focused...
Molecule helps pupils respond to light
...psin-dependent reflex might be complemented by the rods
and cones, the photoreceptors for the conventional...flex in another strain of mouse that have lost the rods
and cones due to degeneration. "We found in these mice that the threshold of the pupil reflex is ele...
Mouse gene knockout illuminates how light resets clock
...tery. Light can still reset the clock even if the rods
and cones, the photoreceptors in the retina for vi... called the suprachiasmatic nucleus. "Unlike the rods
and cones, this light-detection system is thought to respond to the level of illumination rather tha...
Scientists shed new light on the body's internal clock
...clock. But experiments showed that animals lacking rods
or cones could still modify their internal clocks in response to changing light conditions. This led scientists to hunt for an alternate photoreceptor that could regulate the circadian system. Melanopsin, a molecule originally found in frog skin, was...