Tag: "around" at biology news

After a decades-long search, scientists identify new genetic risk factors for multiple sclerosis

...mune system mistakenly attacks a protective sheath around axons the delicate cables that nerve cells use to connect with each other. Various immunosuppressant drugs can reduce symptoms and slow the disease's course, but most MS patients become increasingly disabled with time. The trigger for MS is uncle...

St. Jude study solves mystery of mammalian ears

... the future. The long-standing argument centers around outer hair cells, which are rod-shaped cells that respond to sound waves. Located in the fluid-filled part of the inner ear called the cochlea, these outer hair cells sport tufts of hair-like cilia that project into the fluid. The presence of outer h...

Isoprene emission from plants -- a volatile answer to heat stress

...ilar to what happens in nature, where temperatures around the leaves often oscillate, with short heat spikes). Thus, their results clearly indicate that isoprenes have an important role in protecting the leaves from the harmful effects of high ambient temperature. How does isoprene confer heat tolerance? ...

Surprising new species of light-harvesting bacterium discovered in Yellowstone

...e closest relatives of Cab. thermophilum are found around Mammoth Hot Springs in Yellowstone and hot springs in Tibet and Thailand. As we look more closely, we may find relatives of Cab. thermophilum in the microbial mats of thermal sites worldwide." "Finding a previously unknown, chlorophyll-producing m...

Hepatitis C helicase unwinds DNA in a spring-loaded, 3-step process

... base at a time. The helicase must also navigate around a lot of obstacles: proteins and other co-factors ...d also go off-road, carry some luggage or maneuver around barriers, he said. So it may actually make sense to develop a low-efficiency motor because then you ...

Boston Univeristy bioengineers devise 'dimmer swith' to regulate gene expression in mammal cells

...pressed still gets made. Some genetic switches get around this by entirely snipping out a gene to stop production of a specific protein, but this approach is irreversible. To overcome these challenges, Tara came up with a design that really combined two different technologies to repress or shut down gene ...

Scientists find stem cell switch

...plants use to detect how tough or soft the soil is around them, said Professor Dolan. As in humans, plant stem cells are the source of all growth. The defining characteristics of stem cells are that they are able to either regenerate themselves or produce other types of cells. The ultimate source of cells...

Smithsonian Fragmentation Project threatened by Amazon Colonization Plan

...as hosted hundreds of scientists and students from around the world, working to understand how habitat fragmentation affects the complex Amazonian rainforest. Located two hours north of Manaus, Brazil, the projects study area spans 1,000 square kilometers and is home to an abundance of large rainforest anim...

Gene-transcription machinery seen poised for action, held in check until needed

...gene expression. Histones are molecular structures around which DNA is tightly spooled as part of the cells scheme for maintaining order in the genome and securely storing away genes until needed. Eight histones comprise a nucleosome, and long strings of nucleosomes coil in turn into chromatin, the basic ma...

Study points to new way to predict death risk from torn aorta

...d that this research and work by other researchers around the world lends further weight to the model proposed from the new data. Still, he says, only prospective research and other validation efforts will be able to tell if the false-lumen model is accurate. The NEJM paper is based on retrospective clin...

Researchers watch antibiotics, bacteria meet at atomic level

...igin blocks transcription. Streptolydigin has been around for several decades and the researchers already knew that this antibiotic stops RNA polymerase activity inside a cell. But they didn't know what controlled this mechanism. We have to know what we're looking at and working with before it's possibl...

Additional mammogram readers improve breast cancer detection

...study because of differences in screening programs around the world. Ultimately, deciding on the number of readers needed to interpret a screening mammogram will depend on how many readers are available and which outcomes we seek, the authors write....

Drug protects brain cells in Huntington's disease model, researchers find

...s a fatal genetic condition that usually manifests around ages 30 to 45, according to the Huntingtons Disease Society of America. About one in 10,000 people in America have the disease, with another 200,000 at risk. One of the most famous people with Huntingtons was folk singer Woody Guthrie, who died in 19...

American Chemical Society's Weekly PressPac -- July 18, 2007

...in about 30,000 scientific reports from scientists around the world each year. The reports include discoveries in medicine, health, nutrition, energy, the environment and other fields that span sciences horizons from astronomy to zoology. Podcaster for Science Elements is Steve Showalter, Ph.D., a chemist a...

Study sheds light on why humans walk on two legs

... legs because it required less energy than getting around on all fours. The research will appear in the July 24 print edition of the Proceedings of the National Academy of Sciences. "When our earliest ancestors started walking on two legs, they took the first steps toward becoming human," said lead rese...

Limpets reveal possible fate of cold-blooded Antarctic animals

...rotein-making abilities of limpets in both the sea around the British Antarctic Surveys (BAS) Rothera Resear...stem. Sea temperature is predicted to increase by around 2C in the next 100 years. If cold-blooded Antarctic animals cant grow efficiently, or increase their...

Art and music for the birds

...do exist. Humans have an impact on other animals around us. Catbirds and mockingbirds listen to noise we m...hink about the impact we have on the other species around us, she adds. The bird listening stations are part of the exhibition Inside/Outside: Habitat on v...

Measuring the unseeable: Penn researchers probe proteins' dark energy

...mistry. Biological theoreticians have been kicking around the idea that proteins have energy represented by internal motion, but no one can see it. We figured out how to see it and have begun to quantify the so-called dark energy of proteins. Proteins are malleable in shape and internal structure, which e...

New research proves single origin of humans in Africa

...ers studied genetic diversity of human populations around the world and measurements of over 6,000 skulls fr...ue that modern humans originated in multiple spots around the world. We have combined our genetic data with new measurements of a large sample of skulls to sh...

Assessing levies for by-catch could fund conservation measures

...nd. Their analysis showed that closing the fishery around Lord Howe Island would cost about $3 million U.S. and increase the growth rate of the shearwater population by about 6 percent. But killing the rats would cost only about $500,000, yet yield a 32 percent increase in shearwater population growth. In o...

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(Date:10/30/2014)... October 2014 Biological membranes are mainly composed of ... of solution ions onto lipid membranes helps clarify ... study provides a quantitative description of the equilibria ... Kotyńska and Zbigniew Figaszewski from the University of ... describing these findings, just published in EPJ ...
(Date:10/29/2014)... Beaverton, OR) New research presented at the ... in Houston, TX showed for the first time ... in women using a readily available nutritional supplement, ... by Dr. Judith A. Smith, Pharm.D., associate professor ... Sciences at The University of Texas Health Science ...
(Date:10/29/2014)... all the rage. Thousands of scientists worldwide are conducting ... titanium dioxide nanoparticles from sun creams can get through ... from electronic products are as hazardous for the lungs ... food can get into the blood via the intestinal ... are flowing – and the number of scientific projects ...
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