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Tag: "broken" at biology news

Needling Chromosomes Reveals Cell Division Secret

...said that eventhe smallest misstep could result in broken needles, stretchedchromatids or ripped-apart cells. However, he said, Paliulis masteredthe delicate technique and performed numerous experiments pulling thechromatids apart at different points along their length and atdifferent times during cell divi...

UCLA launches $20 million stem cell institute to investigate HIV, cancer and neurological disorders

...cer stem cells. These therapies hone in on what is broken in a cancer cell while leaving the healthy tissue intact. Several Jonsson Cancer Center researchers already are doing stem cell research in laboratories, and that work will be folded into the institute. * Neurological disorders: UCLA researchers...

Researchers discover molecular mechanism that desensitizes us to cold

...and stimulates the breakdown of PIP2. When PIP2 is broken down, the receptor becomes inactive, thus ending the sensation or desensitizing the cell to the cold stimulus. "This finding provides critical information to help us understand how we sense heat and cold and from that to expand our understanding of ...

Advances in the characterisation of the oyster mushroom genes

... ?the two principal components of wood - are being broken down. Degradation of lignin has been studied over the years by a number of research teams that have characterised the genes involved. But nobody, to date, has tackled the degradation of cellulose from a molecular perspective. Cellulose is the most a...

McGill researchers shed light on formation of carcinogen in food

...ives sometimes form when amino acids or sugars are broken down by the heat of cooking," explains Dr. Yaylayan. "Normally, furan is a volatile chemical which tends to quickly evaporate. However, when it cannot escape for some reason, for example if it is in sealed cans or jars, then it remains present in the...

Insight into DNA's 'weakest links' may yield clues to cancer biology

...l loss and aberrations than normal, resulting when broken chromosomes re-joined with others to form novel arrangements, the researchers reported. Through further examination of breakpoints in a small region of one chromosome, the researchers found that the fragile sites occurred at locations along the DNA ...

At long last, scientists figure out how plants grow

...uxin may stick around awhile, but it is eventually broken down by natural cell processes. The scientists used the common plant model Arabidopsis thaliana (wall cress) for their experiments. They also expressed TIR1 in insect cell cultures, to make sure that the binding of TIR1 to auxin is not directly infl...

Tendency to hair loss inherited from the mother

...lt of the genetic change is more stable and is not broken down so quickly. Both mechanisms can lead to the effect of the androgens becoming greater, which in turn brings about hair loss." The findings are also interesting for the aspect of how hair loss is inherited. The gene for the androgen receptor lies...

Doing a spin with DNA

..., and then lets the DNA unwind before sticking the broken ends back together again. With the help of sensiti...y grabs the spinning DNA and 'glues' (ligates) the broken stands neatly back together again. The researchers were able to determine the exact number of turns ...

Census of Marine Life explorers surprised by diversity, density of Arctic creatures

...t scream across Earth's barren southern latitudes, broken by no high lands. Deadly to explorers, inhospitable to even the mightiest ships and scientific techniques, the vast Southern Ocean has been a closed book to oceanographers until recently. Now, through smaller research studies using modern technology...

Immune system's distress signal tells bacteria when to strike back

...pportunistic pathogen, Pseudomonas aeruginosa, has broken the immune system's code, report researchers from the University of Chicago, enabling the bacteria to recognize when its host is most vulnerable and to launch an attack before the weakened host can muster its defenses. In the 29 July 2005 issue of S...

Mechanism for the captation of nutrients in plants- unknown to date

...nside the vacuola, the substances or nutrients are broken up, stored and metabolised. Two processes of captation This discovery breaks with a fundamental dogma in basic plant science holding that all substances penetrate the interior of the cell through the participation of specific transporters present i...

New method shows it is possible to grow bone for grafts within a patient's body

...e from a patient's rib or hip and fuse them to the broken bone. They use the same method to fuse spinal vertebrae to treat serious spinal injuries and back pain. Although this works well at the repair site, the removal operation is extremely painful and can produce serious complications. If the new method i...

Elderly mice yield clues to the process of growing old

...r than the typical laboratory mouse. "It's like a broken spellchecker," says Prolla. "By introducing a malfunction in the (genetic) proofreading domain, these mutations accumulate much more rapidly." The new work lends support to one of the two leading theories of how animals, including humans, grow old a...

Toxic flood lifts lid on common urban pollution problem

...nder investigation, public scrutiny has focused on broken sewer pipes and other major failures in the city's infrastructure attributed to Hurricane Katrina. Though these are certainly real problems, it's also highly likely that the stagnant waters are contaminated because they've soaked up "legacy" pollutan...

Stressed cells spark DNA repair missteps and speed evolution

...issing DNA from another chromosome and rejoins the broken ends around the newly synthesized genetic material. "It fixes the hole in the DNA by copying similar information," said Rosenberg. However, when the process goes wrong, the repair process introduces errors into the DNA. When graduate student Rebe...

Nanotubes inspire new technique for healing broken bones

...e new technique could change the way doctors treat broken bones, allowing them to simply inject a solution o...nanotube applications, in the medical treatment of broken bones," says Leonard Interrante, Ph.D., editor of Chemistry of Materials and a professor in the depa...

Breast tumors in mice eradicated using cancer vaccine

...where they get killed�whereupon their proteins get broken down into smaller pieces (peptides) and attached t...l, pieces of the very large HER-2/Neu molecule are broken up into little fragments and bound to the MHC Class 1 molecule within the antigen-presenting cell. T...

Firefly protein lets researchers monitor molecule linked to cancer

...enetically altered IKB, the attached luciferase is broken down too, meaning scientists can detect increased IKK activity via decreased light from the cells. "This is like doing in-vivo pharmacodynamics and pharmacokinetics," says Piwnica-Worms in reference to the sciences that study the effects, distributi...

How fish hear and make sounds at same time

.... When analyzed closely, the vocalizations can be broken down into a series of impulses separated in time by only milliseconds. The system is timed only to block out sound at the exact moment when the fish vocalizes, leaving the ear sensitive to outside noises during the millisecond gaps when the fish is s...

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