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Tag: "branches" at biology news

Ants show us how to make super-highways

...d full of ‘pot holes’ as it passes over leaves and branches on the forest floor. The study, by Dr Scott Powell and Professor Nigel Franks at the University of Bristol, and reported in the June issue of Animal Behaviour, shows that these living ‘plugs’ improve the quality of the surface. This increases the ...

Lessons from the orangutans: Upright walking may have begun in the trees

...d have needed a way to navigate the thin, flexible branches at the tree's periphery, where the fruit typically... bipedal, the animals also tended to grip multiple branches with their long toes. On medium-sized branches, the orangutans used their arms more to support th...

Corals -- More complex than you?

...e of the tremendous benefits to medicine and other branches of science such a project would offer. "There has never been a "home grown" genome project. The genomes of several iconic Australian species have been sequenced overseas, and we are being left behind. If important discoveries leading to new techno...

Study of protein folds offers insight into metabolic evolution

...resent, and nine of those occurred in the earliest branches of the newly constructed tree. "These nine ancient folds represent architectures of fundamental importance undisputedly encoded in a genetic core that can be traced back to the universal ancestor of the three superkingdoms of life," the authors wr...

Risk of HIV transmission highest early in infection

...infections formed phylogenetic clusters—very close branches on the family tree. This indicated that a large portion of HIV acquisition could be attributed to individuals transmitting the virus who were themselves in the early stages of infection, before the virus had had time to mutate much. Therefore, early...

UBC researchers reveal dwarf aquatic plants' hidden ancestry

...y revealing that some of the earliest evolutionary branches were more diverse then we once thought." ...

Rewarding fat rats

...citing confluence of work emerging from both major branches of NSERC-supported research: natural science and engineering," says Shizgal. "While natural scientists use concepts and technologies developed by engineers to try to understand what makes animals tick, certain computer scientists and engineers loo...

Chimpanzees found to use tools to hunt mammalian prey

...bies (Galago senegalensis) from cavities in hollow branches or tree trunks. Bushbabies are nocturnal prosimians that retire to such hidden cavities during the day. Although there was only one successful attempt in 22 recorded instances of the chimpanzees using the spear-like tools to find and obtain prey, ...

Lizards 'shout' against a noisy background

...est home can be a visually noisy environment, with branches and leaves waving in the breeze and casting patterns of light and shade. "They have to have a strategy to get their message across," Ord said. Ord videotaped two species of anole lizards, Anolis cristatellus and Anolis gundlachi, in the Caribbe...

Immunization rates hit record high in poor countries

...gi—like the one Costa and Grassano have growing on branches in their laboratory—kill the pest. Last December, Costa, Grassano, and two the other researchers, Vladimir Gouli and Jiancai Li, submitted a provisional patent for a new method of cheaply and effectively spreading the fungus, and other similar "bi...

Fungal factories may save hemlock forests

...gi—like the one Costa and Grassano have growing on branches in their laboratory—kill the pest. Last December, Costa, Grassano, and two the other researchers, Vladimir Gouli and Jiancai Li, submitted a provisional patent for a new method of cheaply and effectively spreading the fungus, and other similar "bi...

UCSF study will test new vaginal microbicide for herpes and HIV

...rimers have molecular structures that resemble the branches of a tree. The herpes and HIV molecules are "caught" in the dendrimer branches and prevented from entering and infecting human cells, Moscicki said. To participate in the study...

Researchers seek to design first treatment for neuroAIDS

... from infection, exposed nerve cells pull in their branches (dendrites), which would normally connect them to other nerve cells. Such disconnected nerve cells, if protected by the right drug, have the potential to be "reconnected," researchers said. HIV also "activates" immune cells that reside in the brain....

Two studies on bee evolution reveal surprises

... Danforth and his group suggests that the earliest branches of the bee's evolutionary tree originate from the family Melittidae. That would mean that bees have an African origin and are almost as old as flowering plants, which would help explain a lot about the evolutionary diversification of these plants. ...

Pressured by predators, lizards see rapid shift in natural selection

...imbs, which are better suited to navigating narrow branches and twigs. Their hypothesis was borne out. Six months after the introduction of the predator, Losos found that the Anolis population had dropped by half or more on the islands with the predators, and in comparison to the lizards on the predator-fr...

Nerve cell software keeps track of brain change

...w images more complex than the intricate, web-like branches of nerve cells photographed down a microscope. HCA-Vision allows researchers to reliably measure significant features of cells' appearance as they change in response to drugs, biochemicals or diseases like dementia. "Benchmarking studies have sho...

Microbe fixes nitrogen at a blistering 92 C

...monia that is useable ?arose before the three main branches of life ?bacteria, archaea and eukaryotes ?diverged some 3.5 billion years ago, according to oceanographer Mausmi Mehta, who recently received her doctorate from the UW, and John Baross, UW professor of oceanography. This is opposed to the theory tha...

Knowledge of dendritic cells branches out

.... These fragments are then presented on the waving branches or "dendrites" of the DC to activate the immune system's killer T cells. These activated T cells then eliminate the existing infection and resist any future attack by memorizing that infection. DC also have an important educative role to play in p...

Increased sensitivity to nerve signals keeps diabetes at bay

... causing smooth muscles to contract. One of three branches of the involuntary nervous system, the parasympathetic, or "rest and digest" system fulfills many roles--slowing the heart rate, dilating blood vessels, and stimulating digestive secretions. Food intake is known to trigger an increase in parasympath...

Salk and Stanford teams join forces to reveal two paths of neurodegeneration

...d that the same molecular shears used to trim axon branches in injured adult axons also do so during normal developmental pruning. In a forthcoming issue of Neuron, teams at the Salk Institute for Biological Studies and Stanford University revise that notion and, in doing so, suggest how nerve function could ...

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