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Tag: "free" at biology news

Meat and two neutrons -- the key to a longer life

... DNA more resistant to detrimental processes, like free radical attack. The isotopes replace atoms in susceptible bonds making these bonds stronger. 'Because these bonds are so much more stable, it should be possible to slow down the process of oxidation and ageing,' Shchepinov says. The isotopes coul...

Birds found to plan for the future

...refused breakfast in another, before being allowed free access to food the rest of the day. On the sixth day of the experiment they were suddenly given whole pine nuts suitable for caching in the evening. The researchers observed that the jays consistently cached most pine nuts in the tray in the ‘no brea...

Scripps Research study reveals new activation mechanism for pain sensing channel

...TRPA1; KEAP1 is a sensor for oxidative damage from free radicals and upregulates expression of antioxidant enzymes. Apparently, reactive compounds can activate at least two pathways through cysteine modification as a warning against cell damage, the study concluded. "Our findings, which are the result...

Resistance to anti-HIV drugs in Uganda developed due to drug supply problems

...s to better survival than self-pay therapy because free treatment may be less susceptible to interruptions...most HIV patients are receiving drugs supplied for free by either PEPFAR—the U.S. President’s Emergency Plan for AIDS Relief, a five-year, $15-billion, mult...

Lead with a poisonous electron shield

... sulfur atoms. The reason for this is the emerging free electron pair of the lead cation. It acts as an el...phere, while the other hemisphere is filled by the free electron pair. This observation may help in the design of future lead-specific antidotes....

Strawberry daiquiris -- the extra-healthy cocktail?

...hol led to an increase in antioxidant capacity and free radical scavenging activity within the fruit. Whil...disorders. They work by helping to mop up damaging free radicals produced naturally during a person’s normal metabolism. Those who aren’t keen on strawb...

Chemical switch triggers critical cell activities

...o E1's empty left hand. That leaves the right hand free to grab yet another NEDD8. By continually passing the NEDD8 proteins from the right hand to the left hand and on to E2, E1 keeps a relay of these batons flowing. In turn, that keeps the specific biochemical cascade triggered by NEDD8 in action. Bu...

Genes and biomarkers that allow doctors to choose the right therapy for the right patient

...is a predictive factor of response and progression free survival in patients treated with Cetuximab: Abstract 5671 Mutations in the KRAS oncogene could predict a lack of response to the drug cetuximab in patients with colorectal tumors. For those with the mutations, the drug is likely to be ineffici...

Are we killing the world's oceans?

...f British Columbia, will kick off the forum with a free public lecture on "Are We Past the Point of No Return in Mining Fish From the Sea?" on Feb. 21 Pauly is one of the world's leading fisheries conservation scientists, and a vocal and influential critic of current fishing practices. All sessions wil...

Progress toward artificial photosynthesis?

...amates: In the first step, CO2 binds to individual free amino groups present in the carbon nitride. It then oxidizes the benzene to phenol, and in the end the highly desirable CO separates from the catalyst. "This could make novel, previously unknown chemistry of CO2 accessible," hopes Antonietti. "It may...

Secret of worm's poison pill box protein could produce new natural insecticide

...events other predators from eating the body giving free reign to the nematode worms to consume it, multiply and move on. However, until now, researchers had little idea of the make up of XptA1 and thus how it worked. The research team, based at the University of Warwick’s horticultural research arm Warwi...

Reading hidden intentions in the human brain

...ecution of the action. Specifically, subjects were free to choose between adding or subtracting two numbers and were asked to hold in mind their intention until numbers were presented on a screen, along with a choice of outcomes (one of which was correct for the addition choice, one correct for the subtra...

Cancer-killing invention also harvests stem cells

...Finally, he learned that when a cancer cell breaks free of a primary tumor and enters circulation, it flow through the bloodstream to a remote organ, then leaves the bloodstream and forms a secondary tumor. This is how cancer spreads. He put these facts together with one more, very important fact: the ...

OHSU surgeon implants donated tissue allografts

...re extensively tested to assure bacteria and viral free grafts are provided to surgeons specializing in cartilage restoration surgery. Tissues can be maintained for up to 28 days in a medium that keeps the cells viable and the tissue healthy so it continues to live after transplantation. Cooperation b...

Need oxygen? Cells know how to spend and save

...dria are designed to produce energy without excess free radical production at normal oxygen levels. Semenza's team noticed that one particular component of the COX protein complex, COX4, comes in two different forms, COX4-1 and COX4-2. Under normal oxygen conditions, the cells' mitochondria contain m...

Studies force new view on biology of flavonoids

...d on laboratory tests of their ability to scavenge free radicals, it appears they have 3-5 times more anti...dants, which are more readily used up during their free radical scavenging activity and require constant replenishment through diet, scientists say. How...

Fast and slow -- How the spinal cord controls the speed of movement

...rupt the release of dopamine, further complicating free movement. Fetcho and his group are building a transgenic line of fish with those brain cells labeled so they may be targeted and removed with lasers....

Sleep quantity affects morning testosterone levels in older men

...mples were pooled for the measurement of total and free testosterone. In addition to overnight laboratory...endent predictor of the subjects?morning total and free testosterone levels. "The results of the study raise the possibility that older men who obtain le...

No magic tomato? Study breaks link between lycopene and prostate cancer prevention

...t in the antioxidant. Antioxidants protect against free radicals, highly reactive atoms and molecules that...A and other important molecules in the cell. Since free radical damage increases with age, there has been a long-held suspicion in the scientific community ...

Do fruit flies have free will?

...he biological foundation for what we experience as free will". Our subjective notion of "Free Will" is ...' if they were entirely determined. So if there is free will, it must be somewhere between chance and necessity - which is exactly where fly behavior comes ...

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