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Tag: "variety" at biology news

A human taste for rarity spells disaster for endangered species

... reptiles, birds, and wild cats, as well as a wide variety of arachnids, insects, and fish. And it appears that pet trade dealers read the scientific literature for clues to the next hot species: immediately after an article recognized the small Indonesian turtle (Chelodina mccordi) and Chinese gecko (Goniur...

UGA scientists unravel 'molecular inch-worm' structure of walking-pneumonia bacterium

...alled "gliding motility." Bacteria can move in a variety of ways, including the use of flagella to "swim." But since M. pneumoniae lack flagella, they "glide," a method of movement that has been known for some time yet never entirely understood. The cells seem to bend and flex, but it's unclear how that is...

MIT creates 3-D scaffold for growing stem cells

...chers are now testing the designer scaffold with a variety of cells, including tooth, bone, heart, liver, cartilage, skin, pancreas, blood cells and artery-forming cells....

Ground spider diversity studied in research project

... animal-safe antifreeze ?to collect the spiders. A variety of sites ?including upland woods, post oak woodlands and an area disturbed by a high level of human activity ?were chosen. The collected samples are being identified and placed in the Texas A&M Insect Collection, department of entomology. Dr....

Cell death following blood 'reflow' injury tracked to natural toxin

...juries long linked to heart attacks, strokes and a variety of blood vessel injuries, the researchers pumped mouse nerve cells full of PAR-polymer. The cells died, but to be sure PAR-polymer (and not something else) killed them, they examined the brains of mice engineered to lack an enzyme that chews up and g...

What animals can tell us about hemorrhage, organ transplants and aging

...imals" scientists will compare the physiology of a variety of long- and short-lived species to understand how they age at different rates, said Deborah Kristan of California State University at San Marcos. Kristan will co-chair the session with Rochelle Buffenstein of the City College of New York. Much of ...

Study of gene transfer for erectile dysfunction shows promise

...the penis that fills with blood during erection. A variety of clinical and laboratory tests were used to assess safety. In addition, effectiveness was measured using the International Index of Erectile Function scale, a questionnaire that is commonly used to measure ED. Patient responses were validated by th...

Beauty and the brain

... have similar preferences for prototypes in a wide variety of other categories, including dogs, birds, fish, cars and even watches. Yet the question "why?" has remained open. A popular explanation has been an evolutionary, sexual-selection one that goes something as follows: Like symmetry (another reliab...

Scientists solve 30-year-old mystery of mutant mouse's kidney woes

...e kidney failure and death. Scientists suspect a variety of environmental and genetic factors contribute to fetal hydronephrosis. However, they frequently cannot tie it to any causative factors, making it difficult to determine how normal molecular and cellular processes in kidney development break down in...

Master planners in brain may coordinate other areas' roles in cognitive tasks

...y brain areas that consistently become active in a variety of cognitive tasks, such as reading, learning a rh...ists previously have implicated the cingulate in a variety of specialized cognitive tasks, Dosenbach notes, but the new analysis may change their thinking. "I...

Parasitic plants sniff out hosts

...odder or five angle dodder, a plant that infests a variety of crops including tomatoes, carrots, onions, citr...s of 4 million dollars." The researchers used a variety of experiments to determine how newly emerging dodder shoots find a host. The length of time these ...

Test reveals effectiveness of potential Huntington's disease drugs

...hers report. "These drugs have been tested in a variety of Huntington's disease models and some HD human trials and results are very difficult to interpret," said Dr. Ilya Bezprozvanny, associate professor of physiology and senior author of the study, available online and published in today's issue of Neu...

Where we change our mind

... many real-world behaviors, adopted also by a wide variety of intelligent machines.?" they wrote. In their experiments, the researchers first taught volunteer subjects the layout of a computer-generated 3D "wire-frame" maze. Then, while the subjects' brains were being scanned using functional magnetic reso...

Adults who go to bed lonely get stress hormone boost next morning

...ching question of my studies of these systems in a variety of contexts is whether overuse of these systems plays a role in disease outcomes."...

ABCB6 is key to production of heme in hemoglobin

...biochemical pathway of heme production can cause a variety of serious diseases." ...

Tamed 11,400 years ago, figs were likely first domesticated crop

...a mutant selectively propagated by humans. In this variety of fig, known as parthenocarpic, the fruit develops without insect pollination and is prevented from falling off the tree, allowing it to become soft, sweet, and edible. However, because such figs do not produce seeds, they are a reproductive dead en...

Mobile DNA part of evolution's toolbox

...es long that are almost exactly the same in a wide variety of vertebrate organisms. Haussler and postdoctoral fellow Gill Bejerano discovered the ultraconserved elements in 2003, and since then they have been trying to figure out how they arose and what function they serve. One ultraconserved element in pa...

Results with newer bladeless LASIK equivalent to standard microkeratome LASIK

...s from both types six months post-surgery, using a variety of vision and eye health measurements. The study's findings will be presented next week in three abstracts at the Association for Research in Vision and Ophthalmology meeting in Fort Lauderdale, Fla. LASIK (Laser-assisted in situ keratomileusis) in...

Light-sensitive photoswitches could restore sight to those with macular degeneration

... that this same photoswitch could be attached to a variety of proteins to push or pull them into various shapes, even making a protein bend in half like a tweezer. In 2006, in a cover article in the new journal Nature Chemical Biology, the researchers described for the first time a re-engineered glutamate ...

Free radical cell death switch identified

...cells in the body contribute to tissue damage in a variety of disorders, including stroke, ischemic heart disease, neurodegenerative diseases, and diabetes, identification of the MST-FOXO switch mechanism could provide potential new targets for the diagnosis and treatment of many common age-associated diseas...

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