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Tag: "changing" at biology news

Regulating the nuclear architecture of the cell

...us locations, these histones are a major factor in changing the functions of chromatin, independent of DNA sequence." Karpen and Peng studied fruit flies with mutant Su(var)3-9 genes, flies that could not produce HP1 proteins or the proteins necessary to methylate H3K9. The results were dramatic. Because ...

Inheritance outside DNA

...have evolved to transmit heritable changes without changing DNA. Among other things, epigenetics is crucial to differentiation, the process which makes one cell from another, and thus is at the heart of the mystery of stem cells. Genomic imprinting is a type of epigenetic change that causes one copy of ...

End of deforestation in view? Experts advance new way to size up global forest resources

...ng and shrinking forest that clarify the causes of changing forest expanse, timber, biomass, and carbon," says lead author, Pekka E. Kauppi of the University of Helsinki, Finland. The co-authors are Jesse H. Ausubel, Rockefeller University, USA; Jingyun Fang, Peking University, Beijing, China; Alexander Math...

Sensory feedback during speech: The brain attunes to more than just sound

...inform the brain of the openness of the jaw or the changing positions of the tongue or lips. To investigate how such somatosensory cues are used during speech production, the researchers in the new work were able to dissociate the contribution of these cues from auditory cues by using a robotic device that...

Researchers to develop active nanoscale surfaces for biological separations

...hey can be actively modified," Kane said. "Thus by changing the temperature, shining light, or applying an electric field, we propose to change the behavior of the surfaces." In one approach, Kane and his colleagues are building a molecular obstacle course made up of nanoscale domains. When an electric field ...

Train your brain to hear your friends at a party

...d with an earplug. Something in their brain was changing or adapting to the new situation and they were learning to compensate for the hearing loss. Irving said: "When we switch on a bright light our eyes detect the increase in light levels and the brain sends a message to the eye to tell it to contract...

New research identifies gene important for nicotine's effects on the brain

...s," said Picciotto. "By identifying molecules and changing their activity we can understand how overall behavior is changed. " Picciotto's work explored how the brain changes when it receives nicotine and, therefore, focused on the dopamine system in the brain. Dopamine is one of a number of neurotransmit...

Researchers link ocean organisms with increased cloud cover and potential climate change

...the ability to predict how clouds would respond to changing particle levels ?whether they originate from human...ically alter the impact of greenhouse gases on our changing climate. "It shows that there is still a lot we need to explore to better understand the delicat...

Scientists show drug can counteract muscular dystrophy in mice

...l , was the discovery that the inhibitor worked by changing gene expression, causing some genes to be upregulated, or make more protein, and others to be downregulated, or make less protein. Among the genes positively regulated by the inhibitors was a gene for a key protein called follistatin. "It was known...

Global changes alter the timing of plant growth, scientists say

...g ways in which natural communities may respond to changing environmental conditions." ...

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

... far been found, although that number is currently changing at the rate of 10 to 20 per year. "It's a safe bet that a child born today could expect a very fruitful career in dinosaur paleontology," said Dodson, professor of anatomy in Penn's School of Veterinary Medicine and professor in Penn's Department of...

Genome info from 'plant destroyers' could save trees, beans and chocolate

...debilitate plants. "We speculate that the rapidly changing genes are being driven to evolve by pressure from the defense systems of the pathogens' host plants," said Virginia Bioinformatics Institute's Brett Tyler, the project's principal investigator. "The Phytophthoras, in addition to their great economic...

Math model predicts cancer behavior

...or shape has fingering, invasive projections. By changing a single condition ?oxygen concentration ?the investigators can modulate the tumor's degree of invasiveness, Quaranta said. The findings suggest that current chemotherapy approaches which create a harsh microenvironment in the tumor may leave behin...

Genetically engineered blood protein can be used to split water into oxygen and hydrogen

...proteins that occur naturally in the human body by changing one small detail of their make-up, such as the type of metal at the heart of a porphyrin molecule, as we did in this study. "It's very exciting to prove that we can use these biological structures as a conduit to harness solar energy to separate w...

Bacteria in small sea life yield new way to make potential cancer drugs

...ted because it's still difficult to understand how changing genes can lead to changes in small drug molecules....ry identified individual mutations responsible for changing from one compound to another. By mimicking this natural process, the researchers synthesized a compl...

NASA snow data helps maintain nation's largest, oldest bison herd

...ss wide prairie lands, 30 million strong, with the changing seasons determining their path and destination. No...t understand how animal populations respond to the changing conditions of the landscape where they live. Snow is a very important factor in the livelihood of al...

Human preference for other species could determine whether they survive

...me species now struggle to survive climate change, changing food patterns and encounters with humans or human activity, such as oil drilling at sea. The species are fairly similar, with some larger and some smaller, Stokes said. But the ones that appear to be most popular are the ones that display the war...

Satellites shed light on global warming

...of the rate at which global temperatures have been changing and how the variability of our climate has been changing," Llewellyn-Jones said. "The ATSR instrument produces data of unrivalled accuracy on account of its unique dual view of the Earth’s surface, whereby each part of the surface is viewed twice...

Army research mission focused on autism

...D children have been playing a significant role in changing the way experts view the disorder. "Children ar... have been playing a significant advocacy role and changing the way experts view the disorder. After outlining their hopes for an array of potential research...

Mosquito genes explain response to climate change

...ion will help predict which animals may survive in changing climates and identify which disease-carrying vectors may move northward, allowing for the production of appropriate vaccines, said William E. Bradshaw and Christina M. Holzapfel, researchers in the department of biology and members of the UO Center f...

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