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Tag: "hold" at biology news

Smokers quit after damage to brain region

...her addictive behaviors may have an equally strong hold on neural circuits for pleasure. The senior authors of the study are Antoine Bechara and Hanna Damasio, both faculty in the year-old Brain and Creativity Institute at the University of Southern California, in collaboration with graduate students Na...

Cholera pathogen reveals how bacteria generate energy to live

...ble components within a single entity, so it can’t hold its shape in any one solvent. Using a stepwise process, Barquera attached labels at significant points along the length of the protein and then determined whether these labels appeared inside or outside the envelope of the cell membrane. The res...

Ape gestures offer clues to the evolution of human communication

...cial/vocal signals similarly, but the same did not hold true for the manual gestures. Rather, the researchers found both within and between species the manual gestures were less closely tied to a particular emotion and, thereby, serve a more adaptable function. For example, a single gesture may communicat...

MIT bioengineer advances survival, promise of adult stem cells

...lls develop into brain tissue. Those stem cells hold great promise for treatment of injuries and some diseases, says MIT professor of biological engineering Linda Griffith. Griffith is the senior author of a recent study showing that when presented in the right physical context, certain growth facto...

A sweet step toward new cancer therapies

...instance, the weakest bonds are not the bonds that hold the protein together; they're the bonds between the sugars," Hakansson said. When those bonds break, the resulting fragments don't give accurate information about either the protein's identity or the exact type and position of sugars present. To g...

Nonvenomous Asian snakes 'borrow' defensive poison from toxic toads

...ad identified six compounds in the snakes that may hold promise in medical treatments for people suffering...e more likely to turn and flee from danger than to hold their ground and perform a toxin-releasing defensive maneuver. "Sequestration of toxins in a spec...

Microbes compete with animals for food by making it stink

...ecially in marine ecosystems. "Microbes that can hold onto these resources and use them for their own growth would be advantaged over microbes that could not prevent their resource from being consumed by animals," Hay added. "If microbes could produce chemicals that prevented crabs or fishes from using ...

Stem cells engage in dialogue with the cells that regulate their futures

...tem cells." Ruohola-Baker added that stem cells hold high hope in regenerative medicine: tapping into the ways cells repair the body to create therapies to fix or replace injured tissues. She mentioned that it is thought that most, if not all, adult tissues contain stem cells. Through self-renewing ...

Hundreds of thousands of viral species present in the world's oceans

...t, the researchers predict that the world's oceans hold a few hundred thousand broadly distributed viral species, with some species-rich regions likely harboring the majority of these species. ...

Lost in the labyrinth

...ps organisms manage stem cells, by keeping them on hold and preventing their differentiation until the right time. Such pathways are usually switched on and off by external stimuli that help cells respond properly to the environment. Now Peggy Kirstetter and other members of Nerlov's lab have shown what h...

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

...l locations that can be reasonably explored. They hold that it is still an open question as to whether their estimates of discoverable genera mirror the actual diversity of dinosaur genera that walked the earth. Their findings, combined with previous studies suggest that nearly half of all dinosaur gene...

Transplanted brain cells hold promise for Parkinson's disease

Transplanted neural stem cells hold promise for reducing the destruction of dopaminergic cells that occurs in Parkinson’s disease and for replacing cells lost to the disease, scientists say. Research published in the current issue of The Journal of Neuroscience shows a human neural s...

Who gives stem cells their marching orders?

...activity of this gene in embryonic development may hold the key to finding a way to control its activity in tumor cells. "We need to separate the aspects of Nodal function, and how this protein is regulated by the cell at the molecular level," says Constam. "The embryo holds the key to this understanding....

Gene-bender proteins may sway to DNA

...ed time-scales on which individual base-pairs that hold the two DNA strands together were transiently breaking. That led us to conclude that the DNA is able to bend or kink on its own, at weak points created by the transient opening of base-pairs, and that the protein recognizes and binds tightly to the b...

Sea urchin genome suprisingly similar to man and may hold key to cures

...e’s genome is remarkably similar to humans?and may hold the key to preventing and curing several human diseases, according to a University of Central Florida researcher and several colleagues. UCF Professor Cristina Calestani was part of the Sea Urchin Genome Sequencing Group, which recently completed se...

Artificial cornea offers better results for infants, some blind patients

... patient's eyeball with a piece of donor tissue to hold the implant in place, like a washer. The device is made of a newer type of plastic that allows nutrients to enter the eye more quickly than previous designs. The latest procedure also includes a large contact lens placed over the cornea to help prote...

Taking 'chips' to the next level of gene hunting

...n on them all DNA sequences. Because each chip can hold thousands of these dots - even a whole genome's wo...rossword puzzle. Boeke's new double-capacity chips hold two layers of dots, a bottom layer that reads across and a top layer that reads down, again using th...

Biodegradable napkin -- featuring sensitive nanofibers -- may quickly detect biohazards

...n complex, and the protein streptavidin, which can hold the antibodies. Composed of a polymer compound made from corn, the nanofibers could be incorporated into conventional paper products to keep costs low. Nanofibers, with diameters near 100 nanometers (a nanometer is one-billionth of a meter, or about ...

Plant-derived molecules, genetic manipulation point to future chemoprevention methods

...unds was particularly powerful. This synergy could hold the key to prevention of breast cancer and should be considered for future clinical trials." Genetic reduction of circulating insulin-like growth factor (IGF)-1 inhibits azoxymethane-induced colon tumorigenesis in mice Mice with a genetic alter...

Successful lung cancer surgery not enough to break nicotine dependence in many smokers

... And they concluded that patients who were able to hold out the longest before they took up a cigarette after surgery were the ones who were most likely not to be smoking in a year’s time. "The results suggest that patients who wait until cancer surgery to quit smoking need assistance from the medical ...

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