Tag: "directional" at biology news
Managing occupational exposures to potential bioterrorist agents
...ging improvements in engineering controls (such as directional
airflow), advances in biosafety equipment (such as biological safety cabinets), and vaccines. A multifaceted policy of continued safety training, careful laboratory practices and procedures, use of personal protective equipment, vaccination, and ea...
Researchers show how to assemble building blocks for nanotechnology
...he researchers, is using patches that are strongly directional
and attract and repel specific parts of other particles, much like proteins do. This finding is important because the biggest impediment to developing nanotechnology is figuring out how to build the tiny structures, which are only as big as the smal...
Bird's eye views earth's magnetic lines
...ab showed that changing the color of light altered directional
information obtained from the magnetic compass in ...ng a "visual" pattern that could be used to obtain directional
("compass") information from the magnetic field, he said. Although the earlier studies by Phillips'...
Reverse-direction movement of a molecular motor
...e: a forward-moving class-I myosin motor domain, a directional
inverter formed by a four-helix bundle segment of human guanylate-binding protein-1 and an artificial lever arm formed by two alpha-actinin repeats. Drs Tsiavaliaris, Fujita-Becker and Manstein's results demonstrate that reverse-direction movement of...
Air dried sperm could allow home storage
...hree hours in a laminar flow cabinet that allows a directional
flow of filtered air to ensure that the sample remained uncontaminated by airborne dust or micro-organisms. The dried sperm can then be stored at normal room temperature or in a normal refrigerator and do not seem to require any other special storage...
Mouse study suggests mammoth evolutionary change
...e did not expect to find the rapid, consistent and directional
change that we did find," he said. While evidence of such fast change has been cited in studies of fruit flies, this is the first reported study to document such quick evolution in a mammal. What may account for this change? "We think it likely th...
50 Arctic lakes show dramatic effects of climate warming
...lakes' sedimentary records have tracked marked and directional
ecosystem changes." The Queen's study will be published this month in the international journal Arctic, Antarctic, and Alpine Research. To reconstruct past environmental trends, the team used fossil markers (tiny algal cells) preserved in lake sedime...
Digital X-ray microtomography yields stunning views of limb regeneration
...ought that regeneration progressed in a continuous directional
manner, from the amputation site to the farthest distal point," said Simon. The Northwestern researchers found that although to the naked eye the limb appeared to regenerate from the amputation site at the upper arm to the fingertips, when they exa...
The jaws stiffness found to dictate speech production
...anies the production of speech sounds reflects the directional
asymmetries of stiffness of the jaw. A comparison of the relationship between stiffness and kinematic variation in the jaw against the patterns was observed when subjects compensate for destabilizing loads to the limb. The ability of subjects to comp...
UCR entomologists report bee-dancing brings more food to honeybee colonies
...onies. The study also confirms that bees use this directional
information in locating the food sources advertise...re dance information, the experimenters provided a directional
light source, which the bees interpreted as the sun. The bees proceeded to do well-oriented dances ...
UC Berkeley scientists detail neural circuit that lets eye detect directional motion
... that starburst cells are not crucial to detecting directional
motion, they found them to be the critical link. "The problem is that there are directionally selective cells and starburst cells everywhere, and you can't tell which are connected," Mnch said. By probing this section of the retina, they discovered t...
Tropical forests under surveillance
...Technical Consulting explained the ins and outs of directional
sensors and range sensors (GPS, RADAR, LIDAR) as well as proximity detectors, accelerometers and micro electronic mechanical systems (MEMS), their limitations and their capabilities for use in biological applications. Charles Perkins, Nokia Corpora...
Discovery sheds light on mechanisms that allow cells to steer directly toward chemical cues
...undergraduate student-elucidated how this internal directional
compass in cells works by studying Dictyostelium d...y is that the two proteins that control the cell's directional
ability, as well as the genes responsible for producing them, also control the development of human ...
Cancer-suppressing protein is part of amoeba's compass
...t known if PTEN in human cells is also involved in directional
sensing or cell mobility, notes Devreotes, even though it is very similar in sequence to the amoeba's version and also removes phosphate groups from PIP3. If it is, the findings could have implications in understanding the spread of cancer from one p...
Movement without senses coded into neurons, says University of Toronto researcher
...s that sensory information plays a crucial role in directional
movement and that without such information, animals are unable to adapt to their surroundings, search for food and survive, Suster says....
URI oceanography models migration and foraging strategies of North Atlantic right whales
... could also use ocean current patterns, either for directional
cues or for a locomotory assist in one or both directions. On a regional scale of ten to hundreds of kilometers, the primary hypothesis regarding how a right whales find the location of feeding grounds once they arrive in the vicinity of the Gulf...
Science Report: Super-crocodile crawls out of the African Cretaceous
...scientists suggested the bulla was used to improve directional
smell in the stiff-necked reptiles, unable to turn their heads towards interesting scents as mammals do. The bulla may have also enhanced vocalizations. "We're still wondering what it's for," admits Sereno. "Crocodilians are among the most vocal rept...
Fly on a treadmill demonstrates super directional hearing
...ochracea , a tiny insect parasite with such acute directional
hearing that it has inspired a new generation of h...the fly match the species thought to have the best directional
hearing -- Homo sapiens -- but it does so with a fraction of the head space, a boon to miniaturizat...
Super hearing in flies may improve hearing aid technology
...able because their ears are so close together that directional
hearing would be impossible in any other animal," ...ert in 1992. The flies' unique mechanism of directional
hearing has inspired a new generation of hearing aid technology and nanoscale microphones. Miniature...
Stanford scientists use noise to sort proteins
...arriers to harness thermal fluctuations to produce directional
motion. Suchdevices were proposed in two theoretical papers published last year by RobertAustin of Princeton and Thomas Duke of Cambridge, and Denis Ertas of Exxon. One of Boxer's former students, Jay Groves, now a Director's Postdoctoral Fellowat th...