Tag: "geometry" at biology news
Study in Royal Society journals presents evidence for inherited factors in homosexuality
...here the contribution of each is determined by the geometry
of the pore a new finding. Such channels actually exist in cells of animals and plants and there is current interest in making membranes containing artificial channels for desalination and filtration. Contact: Professor AE Hill, Physiological Labora...
Study in Royal Society journal on how relationship status influences sex ratios
...s that it stresses the precise role of topological geometry
in Sn group properties. These define the degenerate NMR spin system "dynamical structure" and their "uniform" dual tensorial set completeness via TRI-invariance and its combinatorics.Contact: Dr Francis Temme, Department of Chemistry, Queen's Univers...
Scientists find that the human nose is more complicated than a jumbo jet
... than understanding the flows inside the nose. The geometry
of the nose is highly complex, with no straight li...ch it. The Imperial scientists have found that the geometry
of the nose causes the air to eddy around in the vicinity of the bulb so you can smell the flower. T...
Harvard scientists discover how the venus flytrap snaps
... of the process, they were able to reconstruct the geometry
of the leaf. Finally, a simple mathematical model provided them with a way to understand the quantitative and qualitative aspects of snapping such as when the plant snaps, how long it takes before it goes into action once stimulated, and how fast the...
Six research units given the go-ahead
... Research Units in detail: Combining differential geometry
and discrete geometry
in order to address a multitude of interesting problems is the aim of the Research Unit "Polyhedral ...
Open microfluidic and nanofluidic systems
...en systems are possible in general but only if the geometry
of the surface channels is carefully matched with ... basic properties: They should have a well-defined geometry
by which one can measure the precise amount of liquid contained in them; they should be able to conf...
Why is the helix such a popular shape? Perhaps because they are nature's space savers
...akes up the least space is that of a helix with a geometry
close to that found in natural helices. "It would seem that the success of the helix as a shape in biological molecules is a case of nature working the best it can with the constraints at hand," Kamien said. "The spiral shape of DNA is dictated...
A decade after launch, ERS-2's mission continues
... they periodically inflate and deflate. "The fixed geometry
of the ERS-2 SAR provides a very consistent and reliable product, one which is proving to be highly beneficial for many interferometric applications and operations requiring frequent repeat data sets," says Professor Fabio Rocca of Politecnico Milano...
Motor transport in bio-nano systems
...pendence of the motor transport on the compartment geometry
and on the arrangement of the filaments. Two parti...dhering to a substrate surface. Surprisingly, the geometry
of the system has a rather strong effect on the build-up of traffic jams. In uniaxial systems, traff...
From network to system
...ar networks and cell systems through combinatorial geometry
methods is currently of great interest. "Networks are snapshots of complex systems, and systems are made up of networks in action," says Prof. Andreas Dress, one of the Institute directors. Only by ascertaining the cellular activity in detail can a d...
Study in Royal Society journal on world's only horned rodent
...red from all previously tested animals by ignoring geometry
when a useful feature was present. These findings suggest the importance of nurture in the expression of a basic navigational strategy. Contact: Professor ML Spetch, Psychology, University of Alberta, BSP-217, EDMONTON, T6G 2E9, Canada Costly parasi...
The synapse is a shotgun
...ur modeling technique, we can explore the detailed geometry
of the damaged tissue and ask how much of that anomaly is caused by the geometry
itself," he said. "Once we have pinned down where the real problem is, we can use the model as a fan...
Chickadees can help humans get their bearings
...ollowing landmarks instead. Although able to learn geometry
when guiding themselves to food in lab experiments, the birds consistently ignored the concept when a prominent landmark, in this case a blue wall, was present. "Getting oriented is an important part of solving many spatial navigational problems, suc...
Self-assembled DNA buckyballs for drug delivery
... D.C. They reminded the audience that although the geometry
of solid truncated icosahedrons was first described by Archimedes on paper more than 2,000 years ago, the skeletal, hollow-faced version of buckyballs had not been envisioned until Leonardo da Vinci's illustrations in 1494. Luo added that DNA buckyb...
MERIS monitoring tracks planetary photosynthesis levels
... particles, the presence of soils and the changing geometry
of illumination and observation." The validation of MGVI is in fact an ongoing activity, along with that for a family of related FAPAR algorithms developed by JRC for other satellite sensors, including NASA's MODIS and SeaWiFS, intended to ensure t...
Engineering nerve jumper cables for spinal cord repair in animal model
...-week study period, the researchers found that the geometry
of the construct was maintained and that the neurons at both ends and all the axons spanning these neurons survived transplantation. More importantly, the axons at the ends of the construct adjacent to the host tissue did extend through the collagen ...
Identity theft, cancer detection among interactive demos at UH event
...nderstanding brain function and behavior, teaching geometry
to acomputer through machine learning, remotely controlling robot cars andcharacterizing the Martian landscape through data analysis. More than adozen faculty and numerous graduate students will be in attendance andavailable for interviews, such as ...
Neuronal cell cultures kept on the straight and narrow
...n the cells on the surface to study the effects of geometry
on cell development. The trick is to mask the substrate with multiple alternating layers of positively and negatively charged polymers, building up a so-called polyelectrolyte multilayer (PEM). Properly selected, the PEM coating convinces the neurona...
Beyond lipids: understanding the mechanics of atherosclerosis
...in activating and deactivating JNK." The tubular geometry
of the straight part of arteries ensures that the ...ial stretch of arteries. However, the more complex geometry
of artery branches promotes an unhealthy stretching of the blood vessel along more than one axis. ...
Transmission rates of vCJD
...80 email@example.com Network frailty and the geometry
of herd immunity by Mr. J Ferrari, Ms. none Bansal, Dr LA Meyers and Dr ON Bjornstad (doi:10.1098/rspb.2006.3636) The spread of infectious disease through communities depends fundamentally on the underlying patterns of contacts between individuals....