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Tag: "resting" at biology news

Modeling the restless brain

...seconds. "Our model suggests that the cortical resting state is not time-invariant, but instead contains ...al to generating and shaping brain activity in the resting and active brain. Empirical work on the human brain is challenging due to the fact that the brai...

Cancer stem cells similar to normal stem cells can thwart anti-cancer agents

...e researchers identified a very small, rare set of resting cancer stem cells in the lung cancer samples that looked and behaved much like normal adult lung tissue stem cells. Both the cancer and normal stem cells were protected equally by multiple drug resistance transporters, even if the bulk of the tumor r...

Hearts of male and female rainbow trout are different

... when the trout heart is contracting and not under resting conditions. The study is entitled Sex Differen...es of oxygen consumption and lactate release under resting conditions; the inhibition of oxidative metabolism with NaCN lowered cardiac performance dramat...

Freeze! Scientists film proteins at work by freezing them at different states

...arch done on proteins is based on their study in a resting state and their study in movement is extremely limited due to technological limitations. Today, a French team has made a movie of an enzyme (a protein that catalyses chemical reactions) found in bacteria. “The achievement of this research is two-fold...

'Terror bird' arrived in North America before land bridge, study finds

...es are of the same age irrespective of their final resting place." David Gradstaff, a professor and chairman of the geology department at Temple University, said the technique is timely and important. "If a fossil gets moved or reworked from its place of formation, it will have a fingerprint that is diff...

Does a peptide affect the heart's response to social isolation?

...ncreased risk of heart disease (including elevated resting heart rate, reduced heart rate variability, and reduced parasympathetic regulation of the heart). This study examines whether oxytocin plays a role in the heart’s detrimental responses to social isolation. The Study: Summary of Methodology ...

Breathing easy: When it comes to oxygen, a bug's life is full of it

...The insect respiratory system is so efficient that resting insects stop taking in air as they release carbon dioxide, according to research by Stefan K. Hetz of Humboldt University in Berlin, Germany. This allows them to keep oxygen and carbon dioxide levels in balance. Too great a concentration of oxygen is...

Researchers show that veins stiffen as we age

...e Lab on the Newark campus. While each subject lay resting on a gurney, various gauges, connected to computers, were placed on their arms and legs. An arterial cuff was attached to an upper arm to monitor blood pressure, and venous cuffs were placed around the upper thigh and upper arm to measure the blood f...

Gladstone investigators identify a new protective action for the powerful anti-HIV factor, APOBEC3G

... at an early step in its life cycle. However, when resting CD4 T cells are stimulated by a foreign protein or other signal, A3G is rapidly recruited into large RNA protein complexes within the cells. This change neutralizes the anti-HIV properties of A3G, opening the door to HIV infection. In the current...

Fishy cooperation

...fish. (Watch a grouper signal to a giant moray eel resting in a cave by shaking its head in front of the moray in this video.) ...

Clue found to Epstein-Barr virus' ability to form and sustain tumors

... of amino acids prevented EBNA-1 from transforming resting B cells into proliferating cells. Under normal conditions, a cellular protein binds this 25-amino acid segment of EBNA-1, allowing transcription of viral and cellular genes regulated by EBNA-1 to occur. Hammerschmidt and Sugden are now trying to ide...

Study shows pine bark naturally decreases severe chronic venous insufficiency

...g effect of standing and again after 30 minutes of resting with feet elevated. Measurements were taken at the beginning of the study and after four and eight weeks of treatment. A composite, analogue score based on signs and symptoms (edema, pain, restless limbs, subjective swelling, and skin alterations/red...

Bedsores and bald hides: Novel roles revealed for a 'scaffolding' protein

...tinuously through three phases - growth, death and resting - during normal hair growth. According to the researchers, cells lacking K17 speed from growth to death faster than normal cells, preventing sufficient hair growth. When cells of normal hair follicles die, they follow a specific and genetically co...

Restoring seagrass beds: Is it for the birds?

... hoping to attract seabirds to use the stakes as a resting area where they can "do their business" and fertilize the shoal grass beneath them. "Birdstakes have proven successful in the Florida Keys," comments Dr. Heck. "We're placing signs in marinas and along the grassbed borders warning boaters against u...

Potential heart benefit found in stem cells

... wall motion abnormalities, as well as the size of resting and stress-induced perfusion defects. They also m...nd negatively correlated to the stress-induced and resting perfusion defects. "In at-risk patients, combined treatment with bone-marrow derived stem cells m...

Novel molecular 'signature' marks DNA of embryonic stem cells

... later activity. "For genes, this is equivalent to resting one finger on the trigger," said Stuart Schreiber, an author of the Cell paper, the director of the Chemical Biology program at the Broad Institute, and professor at Harvard University. "This approach could be a key strategy for keeping crucial genes...

Next good dinosaur news likely to come from small packages

...n an environment void of oxygen (say, if it's been resting in a swamp) can last for 200 hours at temperatures of 100 degrees Celsius. "If we have a protein sequence from bone, we can tell if the material is an original part of the organism that will provide interesting information about its past. We can kn...

How does the brain know what the right hand is doing?

...where their hand was pointing, both when they were resting and when they were pushing against the plate. After the arm was paralysed and anaesthetised, the subjects were unable to detect when researchers moved their hand, but incorrectly thought that they were still able to move it themselves when they tried...

Getting old? Slowing down? Blame inefficient mitochondria

...of the University of Washington, Seattle, compared resting muscle cells from young (7-month) and old (30-month) mice. They found that old muscle used around half as much energy as young muscle, but that the mitochondria used just as much oxygen at both ages. This represents a 50% loss in efficiency. "The be...

The reason why antiviral therapy can't annihilate HIV infection, and what to do about it

...stence. They demonstrate that HIV persists in both resting and activated CD4+ T cells of patients having rece... Their data also suggest that latently infected, resting CD4+ T cells may become reactivated, most likely as a result of normal immunologic responses to vari...

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