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Tag: "switched" at biology news

Stroke study sheds light on left-right brain divide

... everyday situations which require attention to be switched flexibly from one thing to another. ‘This study highlighted the role that the right-hand side of the brain has in keeping track of our own actions and helping us to notice when we have made mistakes,’ Dr Hodgson added. ‘This type of “self-monitori...

U-M researchers discover gene switched off in cancer can be turned on

...plicated in the development of cancer cells can be switched on using drugs, report researchers from the University of Michigan Comprehensive Cancer Center. The finding could lead to a new class of targeted cancer therapies with potential to benefit many different cancer types. Popular new drugs such as Herce...

Physicist cracks women's random but always lucky choice of X chromosome

...r scientific reason as to why one X chromosome was switched off rather than the other. The observations also seem to run counter to the usual idea that the biological mechanisms evolve in ways that allow a "best" choice to be made between things rather than a random one. Now researchers led by University o...

Hawaiian treasure, macadamia nuts good for the heart

...participants for five weeks. The participants then switched diets and continued eating only food provided by the researchers for another five weeks. The Healthy Heart diet with macadamia nuts did reduce total cholesterol, low-density lipoprotein cholesterol and triglyceride levels compared with the stand...

Scientists: As rainfall changes, tropical plants may acclimate

...Isotopic analysis of the plants revealed that they switched from nitrate to ammonia "abruptly, and in unison" once the rainfall reached a certain level. "There's an abrupt change halfway through the rainfall gradient, and they all switch to this other form for their nutrition," Schuur said. That's a sur...

Scientists identify prion's infectious secret

...ees Celsius, the baker’s yeast recognition element switched on. At 37 degrees Celsius, the pathogenic fungi element was activated. In other words, temperature alone could dictate which yeast species the prion could infect. Additionally, the prion’s behavior could be altered by subtle alterations in the recogn...

Magnetic computer sensors may help study biomolecules

...agnetic properties. Their net magnetization can be switched on and off by applying an external magnetic field of sufficient strength to align the electron "spins" in the magnetic layers in the same (on) or opposite (off) directions. NIST researchers made an array of spin valves, each about one by four microme...

Need oxygen? Cells know how to spend and save

... regions of COX4, they found that the HIF-1 sensor switched on COX4-2 activity when oxygen is low. And they learned that because COX4-1 already is in the mitochondria, the swap for COX4-2 occurs when the sensor turns on yet another gene that produces an enzyme to specifically chew up COX4-1. Engineering human...

Trusting your instincts leads you to the right answer

...ch for their target. The visual display screen was switched off at various time intervals either before or after the subjects' eyes landed on the target. When the on-screen image was hidden immediately after the subjects' eyes had landed on the target, the subjects often believed they were just guessing where...

Birth rate, competition are major players in hominid extinctions

...enced the same reduction in large animal game, but switched to also fishing, snaring small mammals like rabbits and capturing turtles and birds. "Rather than being a specialized large mammal predator, modern humans would eat anything they could get their hands on. They eked out a living even if it meant e...

Scientists unlock secret of what makes plants flower

... The FT protein is produced when the FT gene is switched on by another gene known as CONSTANS. This is a key gene expressed in leaves which reacts to changes in day length. Dr Colin Turnbull from Imperial College London's Division of Biology, who carried out the research, said: "This could be a really ...

How stem cells are regulated

...iation. During differentiation, specific genes are switched on while other genes are switched off. The genes that are activated during differentiation determine which type of cell the stem cell ...

Turning a cellular sentinel into a cancer killer

...RNAi) that had been modified so that RNAi could be switched off by the antibiotic. The RNA interference technology was developed in collaboration with HHMI investigator Gregory Hannon at Cold Spring Harbor Laboratory. When the researchers reactivated p53 in the mice they found that the liver tumors complete...

Something new under the sun

... of fossil fuels: the heating in the greenhouse is switched on. Furthermore the greenhouse can be ventilated to decrease humidity and reduce the temperature. Thanks to modifications and Van Ooteghem's new control system less energy is lost and excess heat is reused. This means that sustainable energy can be u...

Low levels of neurotransmitter serotonin may perpetuate child abuse across generations

...pieri and his colleagues studied females that were switched at birth between abusive and non-abusive mothers. That research showed that the offspring of non-abusive mothers were likely to become abusive themselves if they were raised by abusive mothers. That finding showed that the intergenerational transmiss...

Neuron cell stickiness may hold key to evolution of the human brain

...enes and DNA sequences that control when genes are switched on or off. In this study by comparing the entire genome of many organisms to that of humans we were able to identify a series of human-specific sequence changes that have a high likelihood of turning genes on and off." Homo sapiens share more th...

Lost in the labyrinth

...on until the right time. Such pathways are usually switched on and off by external stimuli that help cells res...This created cells in which the pathway was always switched on. We've known that Wingless contributes to blood differentiation, but didn't know how the signals ...

Detailed 3-D image catches a key regulator of neural stem cell differentiation in action

...n, muscle and liver. In the nervous system Scp1 is switched off, enabling RNA polymerase II to efficiently transcribe information encoded by neuronal genes and driving the maturation of neural stem cells into specialized neurons. "Scp1 is an interesting twist on how genes can be regulated during developme...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

...ve below the surface in frigid water, shivering is switched off, the study found. By shutting down the shivering response, a seal allows its body temperature to drop and achieves the benefits of hypothermia: a slower metabolism and lowered oxygen requirements which extends the dive time, Folkow said. T...

Hope for a more effective and less toxic cancer drug

..., explains, "Normally, the cell death machinery is switched on when damaged cells need to be removed. The failure of the machinery to be turned on when it should can lead to cancer. ABT-737 is a 'switch flicker' that kicks the cell death machinery into action. Much more remains to be done to assess the drug's...

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