Physics provides new insights on cataract formation

... of neutron scattering experiments and molecular dynamics computer simulations. They found that a finely tuned combination of attraction and repulsion between the two proteins resulted in an arrangement that was transparent to visible light. By combining experiments and simulations it became ...

Repulsion in Biological News

ORNL supercomputer simulation wins prize for fastest-running science application

... this behavior without artificial cooling. The team studied the local repulsion between electrons on the same atom. Because electrons have a negative ... to become superconducting, however, the electrons must overcome this repulsion and join into units called Cooper pairs. The team is looking to take ...

Weird water: Discovery challenges long-held beliefs about water's special properties

... materials into their imitator and showed that it had the same oil-water repulsion as real water across a range of temperatures. They also simulated ... it has these very special properties. To show that you can have oil-water repulsion without hydrogen bonds is quite interesting. Debenedetti noted that ...

New computer simulation helps explain folding in important cellular protein

... about membrane proteins in general, too. They found that unlike some proteins for which folding is mainly governed by their attraction to or repulsion by water, the process in GpA is driven by a subtle interplay between multiple types of interactions. ...

New windows opened on cell-to-cell interactions

... in which like-charge attraction can be controlled, simply by the incorporation of molecules from biological membranes. We can tune attraction or repulsion over the entire spectrum simply by changing the composition of the membrane. This is useful both for technological applications, and for illuminating ...

A second career for a growth factor receptor: keeping nerve axons on target

... that providing axons with a lot of options is not the way to build a brain. "Attraction is like finding the best seat in an empty movie theater, but repulsion is like picking the lone empty seat in a full theater." "We have shown that ephrin-A cannot transduce an intracellular signal by itself and ...

New electrostatic-based DNA microarray technique could revolutionize medical diagnostics

... disease detection can be read and evaluated without the need of elaborate chemical labeling or sophisticated instrumentation. Based on electrostatic repulsion in which objects with the same electrical charge repel one another the technique is relatively simple and inexpensive to implement, and can be ...

MIT crafts bacteria-resistant films

... been overlooked in studies of how bacteria adhere to surfaces in favor of other traits such as surface charge, roughness, and attraction to or repulsion from water. The new work shows that stiffness should also be taken into account, said Van Vliet. The new films could be combined with current ...

Can certain metals repel sharks from fishing gear?

... to determine if small ingots of a relatively inexpensive electropositive alloy were repulsive to sharks under controlled laboratory conditions. If repulsion occurs consistently in the lab, the next step would be to conduct field trials. Brill says juvenile sandbar sharks were used in the study because ...

Crammed with charged DNA, pressure rises inside virus

... in the early on-line edition of Proceedings of the National Academy of Sciences. “First, the DNA must be forced to bend. Second, the electrostatic repulsion of the DNA’s negatively charged backbone must be overcome. We found that the positively charged ions in the solution are critical to overcoming this ...

Repulsion in Biological Technology

Attraction at the atomic level

... transporting medium. It appears that the electrons with the strongest repulsion in one situation are the most adept at superconductivity in another, said ... may rest instead on electrons ability to take advantage of their natural repulsion in a complex situation. Having developed the ability to measure with ...

Material world: Graphene's versatility promises new applications

... an essential part of this understanding. Capacitance is a material's ability to store energy. In classical physics, capacitance is limited by the repulsion of like electrical charges, for example, electrons. The more charge you put into a device, the more energy you have to expend to contain it, in order ...

Repulsion in Biological Definition

Activation energy

... heat of the system, i.e. the translational , vibrational , and rotational energy of each molecule . If there is enough energy available, this repulsion is overcome and the molecules get close enough for attractions between the molecules to cause a rearrangement of bonds. The Arrhenius equation ...

Repulsion in Biological Dictionary

Repulsion

... repulsion is a 1965 film directed by Roman Polanski on a ... includes Catherine Deneuve, Ian ... repulsion is an early grindcore / death metal band from ... band of all time". Definition of repulsion from the Merriam-Webster Online Dictionary with ...

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