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Tag: "motions" at biology news

Simulations unravel outer membrane transport mechanism

...he task was enormous, however. “The fundamental motions of atoms that guide large conformational changes happen on a very short time scale: femtoseconds,” Tajkhorshid said. Each step relies on the completion of a previous step, so the simulations take an extensive amount of time and considerable computati...

Protein enables discovery of quantum effect in photosynthesis

...g and interfering constructively, forming wavelike motions of energy (superposition states) that can explore all potential energy pathways simultaneously and reversibly, meaning they can retreat from wrong pathways with no penalty. This finding contradicts the classical description of the photosynthetic ener...

Bones in motion: Brown scientists to create new 3-D X-ray system

... now, researchers trying to understand the complex motions of bones and joints are held back by technology. Computed tomography, or CT, delivers detailed 3-D images, but CT scanners are too slow to capture rapid motion. Cinefluoroscopy, a technique that uses X-rays to view objects, can produce moving images ...

Mimicking how the brain recognizes street scenes

...he team is also working on a model for recognizing motions and actions, such as walking or talking, which could be used to filter videos for anomalous behaviors ?or for smarter movie editing. ...

Chimpanzees found to use tools to hunt mammalian prey

... fashion, and subsequently using them with jabbing motions in an apparent effort to obtain lesser bushbabies ...al. The hunting behavior included forceful jabbing motions into branch or trunk hollows, and chimpanzees were seen to subsequently open the hollows by breaking...

Gold nanoparticles prove to be hot stuff

...nable faster measurements and detection of smaller motions at the same laser power. As described in the Aug. 15 issue of Optics Letters,* the JILA team demonstrated that 100-nanometer-wide gold beads, as expected because of their metallic nature, can be trapped and detected six times more easily than polysty...

Computer scientists unravel 'language of surgery'

... large vocabulary that we can use to represent the motions in surgical tasks." The team also hopes to incorporate video data from the da Vinci and possibly from minimally invasive procedures performed directly by surgeons. In such operations, surgeons insert instruments and a tiny camera into small incisio...

Teenager moves video icons just by imagination

...eo games of the late '70s. The player controls the motions of a movable laser cannon that moves back and forth across the bottom of the video screen. Row upon row of video aliens march back and forth across the screen, slowly coming down from the top to the bottom of the screen. The objective is to prevent a...

Biologists probe the machinery of cellular protein factories

...ositions, Noller is finding clues to the molecular motions with which the ribosome does its work. "Our next goal is to trap the ribosome in other functional states to get more frames of the movie," he said. The authors of the paper, in addition to Noller, are postdoctoral researcher Andrei Korostelev, se...

Reading Shakespeare has dramatic effect on human brain

...plines, we may discover new insights into the very motions of the mind." ...

Nanopore method could revolutionize genome sequencing

...ematical calculations and computer modeling of the motions and electrical fluctuations of DNA molecules to determine how to distinguish each of the four different bases (A, G, C, T) that constitute a strand of DNA. They based their calculations on a pore about a nanometer in diameter made from silicon nitri...

Major WHO study concludes calcium supplements can reduce complications during pregnancy

...the molecule is used as the input, and the various motions and shapes sampled are governed by Newtonian physics, the electric forces among atoms, the complementarity or clash of the different shapes that the enzyme takes, and penalties or bonuses for creating or relieving geometric strain. The scientists de...

Computer simulation hints at new HIV drug target

...the molecule is used as the input, and the various motions and shapes sampled are governed by Newtonian physics, the electric forces among atoms, the complementarity or clash of the different shapes that the enzyme takes, and penalties or bonuses for creating or relieving geometric strain. The scientists de...

Scientist uses dragonflies to better understand flight

...aid. "Power is limited. So finding these efficient motions is very important." Still, Wang's work moves researchers a step closer to building such a machine. "I want to build insects on a computer as a way of learning why almost all things that move in fluid use a flapping motion," said Wang. "Whether it's...

Zooming in on the protein-conducting channel

...mic information on the multitude of vibrations and motions that complex molecules preferentially undergo. NMFF analysis revealed that the cryo-EM data were best explained by a model in which the two PCC clamshells were joined in a “front-to-front?arrangement. This arrangement yielded significant insight int...

Membrane research opens window to benefits for plants, humans

...see how every single atom moves and how collective motions of a large number of atoms resulted in the opening of the channel," he said. Aquaporins -- discovered in 1991 by Peter Agre, now vice chancellor for science and technology at Duke University Medical Center -- help cells adjust water content. So far ...

Biologist Discovers What May Be World’s ‘Pickiest?Mates

...s at prospective female passers by, much as humans motions “come here?with their arms and hands “The California fiddler crabs use a lateral wave that looks much like a human beckoning 'come here??deRivera said. “It also seems to serve as a 'come hither' signal, as a male waves, standing at his burrow entran...

Researchers use 3-D imaging system to unveil swimming behavior of microscopic plankton

... mainly due to the lack of technology to track the motions of the miniscule animals in the sea. Now, an international team of scientists from Israel, the United States and Germany led by Amatzia Genin of the Hebrew University of Jerusalem has provided, for the first time, evidence of the remarkable dynamics...

X-Ray Beams And Fruit Fly 'Flight Simulator' Aid Scientists' View Of Muscle Power

...ng muscles during flight and probing the molecular motions deep within the muscle cells.?/p> These experiments uncovered previously unsuspected interactions of various proteins as the muscles stretch and contract. The results suggest a model for how these powerful biological motors turn “on?and “off?duri...

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