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Tag: "sides" at biology news

Older female fish prefer imperfect male mates, study finds

...imations simultaneously were projected on opposite sides of a tank, and researchers measured the time the female spent with each animation. While younger and smaller females still showed a preference for the symmetrical male, older and larger females increasingly preferred the asymmetrical male. In previo...

Worms know bad food when they smell it

...ither of two types of bacteria growing on opposite sides of a lab dish, this was impossible to discern, Bargmann said. Hang Lu, a postdoctoral fellow in Bargmann's lab, used her engineering expertise to design a more complex maze for the worms to navigate through, allowing them to choose from several var...

HIV/AIDS rates in Tijuana, Mexico increasing at alarming rate

...researchers. "Intervention and prevention on both sides of the border are urgently needed, because of the high mobility between Tijuana and San Diego County," said Brouwer, adding that high-risk groups ?men who have sex with men, injection drugs users, sex workers and pregnant women ?are of particular con...

Researchers solve mystery of how nuclear pores duplicate before cell division

..., coordinated process requiring components on both sides of the nuclear membrane. "This has important consequences for the next big issue ?the question of how these structures all fuse together," Hetzer says. ...

Why nerve cells work faster than the theory allows

... this model. Both characteristics behave like both sides of a seesaw. To obtain a high variability of the threshold value, the model requires a low speed of initiation of the action potential. A rapid onset is only obtained, when the variability of the threshold value is low. In order to recreate the obs...

Forsyth scientists gain greater understanding of how embryos differentiate left from right

...in H+ flux, by increasing or decreasing it on both sides equally, both randomized the location of the viscera without causing any other defects. To understand the mechanism of action of H+-V-ATPase, researchers isolated its two physiological functions, cytoplasmic pH and membrane voltage gradient (Vmem) re...

Lizard 'third eye' sheds light on evolution of color vision

...l as the lateral eyes of the lizard - those on the sides of its head. But when the lizard's third eye sees green light, the green pigment triggers a different molecule called Go, known as "G-other," which also signals light responses in the light-sensing cells of the scallop and other creatures without a b...

Anemone genes reveal versatile building blocks for body plans

...se animals, the proteins are expressed on opposite sides of the dorsal/ventral axis very early in embryogenesis, during gastrulation. However, the researchers found that the anemone ligands and their antagonist protein are at first expressed together--then, as gastrulation proceeds, the proteins become seg...

UF scientists discover evolutionary origin of fins, limbs

... half a billion years ago in fishes, not along the sides of the body where the fins that preceded human arm...evolutionary debut at a particular location on the sides of the body, intuitively one would think the genetic tools for fin development would be brought toge...

Radiation-armed robot rapidly destroys human lung tumors

...treatment, Cyberknife blasts a lung tumor from all sides by delivering typically 100-150 intense, focused x-ray beams, causing the tumor to absorb approximately 10 times more radiation than in a conventional radiotherapy session. Cyberknife can deliver so much more radiation than other techniques because ...

Smooth sailing: 'cruise ship virus' tackled by UH, Baylor College of Medicine

...hat measure just a few micrometers wide. Three sides of the reflectors will be covered with reflective material and will be populated with the Norwalk antibody. These retroreflectors will be dispensed onto the slide. If Norwalk is present on the slide from the previous protein/antibody bond, the retr...

Light guides flight of migratory birds

...gratory condition leave tracks or scratches on the sides of the funnel as they attempt to take flight in the migratory direction. A problem arises, however, because funnels block the lower 20 degrees of the sky. In the only two experiments (out of 30 or so) carried out during migration where birds were exp...

Polynesia explorers created worldwide web of scientific knowledge

...st half of the nineteenth century. Parties to both sides were convinced of the truth of their position and the bad faith of their opponents." ...

Beaver dams create healthy downstream ecosystems

...te the river banks and flow underground toward the sides of the valley, instead of down the center of the valley. The researchers suggest that the elevated moisture levels found in soil surrounding the dams would otherwise require water from a very large natural flood, which they estimate as the 200-year ...

Dust to gust

...ape and geographic features: it is flanked on both sides by enormous basalt mountain ridges, which create a cone-shaped crater with a narrow opening in the northeast. Winds that "drain" into the valley focus on this funnel-like opening similarly to the way light is focused by an optical lens, creating a la...

Did 'ABCs' cause Uganda's fall in HIV rates?

...vocative debate in PLoS Medicine considers the two sides to the question of whether the ABCs are helpful or harmful in the battle to control the HIV pandemic. Elaine Murphy and Margaret Green (George Washington University School of Public Health and Health Services) argue that "ABC behaviors were attainab...

Mechanical 'artificial hearts' can remove need for heart transplant by returning heart to normal

...P) study, which is envisaged to start soon on both sides of the atlantic. The researchers are also continuing their molecular and cellular research and studying the mechanistic and therapeutic targets which have made the recovery observed in this study possible. ...

Dig deeper to find Martian life

...iation, and the gullies recently discovered in the sides of craters, as they are thought to have flowed with water in the last five years. The team developed a radiation dose model to study the radiation environment for possible life on Mars. Unlike Earth, Mars is not protected by a global magnetic fie...

Cholera pathogen reveals how bacteria generate energy to live

...of the enzyme is organized with respect to the two sides of the membrane. The problem is that the enzyme is not amenable to standard methods of determining structure. Since an ion pump needs to carry ions from one side of the bacterial membrane to the other, the enzyme has to reach all the way from the wat...

Biologically inspired sensors can augment sonar, vision system in submarines

...y on a row of specialized sensory organs along the sides of their bodies, called the lateral line. Now, a research team led by Chang Liu at the University of Illinois at Urbana-Champaign has built an artificial lateral line that can provide the same functions in underwater vehicles. "Our development of an...

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