Tag: "environments" at biology news

Roadsigns for rodents

...e ploughed fields, without obviouslandmarks. These environments are not the same all year round,and harvest time drastically changes the availability of anyfixed landmarks, food supplies and hiding places. During field observations, Pavel Stopka and David Macdonald fromthe Department of Zoology at the University ...

Executive functioning in children prenatally exposed to alcohol

...l functioning. The ability of the children's home environments to provide intellectual stimulation was also assessed. The children in the alcohol-exposed group had a worse TI performance than the children in the control group. This effect persisted even after controlling for prenatal drug exposure, postnatal e...

Mother-infant bed sharing is associated with an increase in infant heart rate

... rate and its variability between the two sleeping environments is not clear since clinical outcomes were not a part of the experimental design. However, it does appear that the bedsharing infants exhibit an increase in sympathetic activity, compared to solitary sleeping infants. While there is strong epidemio...

50 Arctic lakes show dramatic effects of climate warming

.... More fossils of the type that live in open water environments were found in the top (most recent) layer of sediment an indication that these lakes have less ice cover and a longer growing season that would alter important lakewater properties such as light availability and the way lakes stratify, as a result o...

New proteomic techniques reveal workings of bacteria linked to cystic fibrosis

...um has a remarkable capacity to adapt to different environments and live even when nutrients are very limited. It does not colonize the lungs of healthy individuals. But lungs of people with cystic fibrosis get colonized early in life. Almost all CF patients are infected with P. aeruginosa by the teenage years an...

Free-radical model too radical

...ems, oxygen free-radicals do their work in complex environments that are difficult to observe. Many of the compounds which generate oxygen radicals are too unstable to use in a laboratory. "You look at them wrong and they will blow up in your hand," says Tanko. So, years ago, chemists started using a specific oxy...

Underwater sensor system could protect reservoirs, drinking water

... network sensor technology for operation in liquid environments has recently been highlighted in reports detailing the chemical slurry of antibiotics, estrogen-type hormones, insecticides, nicotine and other chemicals in the rivers of industrialized countries," says Dr. Craig A. Grimes, associate professor of ele...

15-foot hypodermic needles provide evidence for vast oceanic crustal biosphere

...e acidic iron-, sulfur- and heavy-metal-rich fluid environments in areas where seafloor is being created at mid-oc... of millions of years old. "The types of seafloor environments we sampled last summer are found everywhere in the ocean. This argues, although it doesn't prove, th...

Gene that drives cells to commit suicide also plays key role in development of skeletal muscle

...myoblasts. In most cells, FKHR responds to hostile environments by stimulating a cascade of biochemical reactions that executes a process called programmed cell death, or apoptosis. But this activity is blocked when an enzyme called Akt attaches a phosphate molecule to each of three sites on FKHR. Phosphate is a ...

Dinosaur, crab fossils reveal ecosystem secrets

...more accurate -- description of what these ancient environments would have looked like. "The deposits that enclose the dinosaur and the crab also contain crocodile-like animals, various invertebrates, fish, sharks, plesiosaurs, a kind of reptile, and turtles as well as plant material. Thus, we have a very comple...

Scientists re-evaluating the meaning of 'desertification,' Duke ecologist says

...terconnected factors that cause sensitive dry land environments to sometimes degrade to points of no return. "The problem is that a single word, desertification, is used to characterize a myriad of issues and in doing so is the root of so many controversies," the Duke biology professor said in an interview. "Tho...

UCSD biologists discover key to blocking inflammation

...eukocytes that enter these low oxygen, or hypoxic, environments also possess molecular and genetic "switches" that allow them to change their metabolism from an oxygen-dependent (aerobic) to an oxygen-independent (anaerobic) mode of generating energy. But until now, the importance of those switches to regulate in...

Evolution boosted anti-cancer prowess of a primordial gene

...ppressing activity. Arf responds to cancer-causing environments by activating the well-known tumor suppressor gene, p53. In turn, p53 activates a battery of other genes to stop cell growth or, in extreme cases, to trigger cell death in response to a variety of harmful conditions, such as DNA damage or activation ...

Technological advances making life easier for people with physical and mental challenges

...devices for people with disabilities in real-world environments should enhance lab research, but sense-heightening technologies cannot replace the development of reading and writing skills, which are essential for understanding language and math, according to scientists at the 2003 American Association for the Ad...

Methane and mini-horses: Fossils reveal effects of global warming

...productive cycles of mammals that live in seasonal environments are tuned to seasonal cycles," Gingerich said. "If an animal has a one- or two-year period in which to grow to maturity and reproduce, and it's trying to do that on a diet that's difficult to digest and not very nutritious, it's not surprising that i...

New research tools are opening the 'black box' of coastal ecosystems

...ravel as they grow and disperse. "These underwater environments are characterized by very complicated ocean proces... is helping scientists chart the dynamics of ocean environments at scales as small as 1 kilometer, thus revealing the physical connections between reserve and non-r...

Bugs from the deep may be window into the origins of life -- on earth and beyond

...so reveals bacteria's adaptability to all kinds of environments where photosynthesis cannot take place. Everett Shock of Arizona State University studies life in hot springs such as those in Yellowstone National Park. Shock and his colleagues have identified more than a hundred possible types of metabolic reactio...

Discovery of iron-acquisition pathway suggests new treatments for drug-resistant Staph. infections

... to be involved in removing the iron from heme. In environments where heme was the sole iron source, bacteria that lacked certain isd genes, or the genes for two enzymes, Sortase A and B, that help anchor the iron-scavenging proteins to unique positions within the cell wall, were unable to grow. The next step, th...

Arthropods of Tropical Forests

...cosystems. Arthropods from extreme tropical canopy environments differ from understory dwellers, whereas in temperate forests the vertical distribution of insects is far more uniform where such specialized microclimates and their extraordinarily specific fauna do not exist. In Guyana, one team found that when can...

Essay on genes and behavior prompts culture clash in academic journal

...r broadened to accommodate the fact that genes and environments sometimes interact in ways that cannot be estimate...which are based on the dubious assumption that the environments of fraternal twins are as similar as the environments of identical twins,'' they added. ''We often s...

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(Date:8/1/2014)... FRIDAY, Aug. 1, 2014 (HealthDay News) -- Although older women ... make asthma care a priority, according to a new study. ... from asthma much more than men over 65," concluded Dr. ... of Allergy, Asthma and Immunology (ACAAI), in an organization news ... age 65 years and older is nearly four times higher ...
(Date:8/1/2014)... New research shows that people who grew up ... a 16-percent greater risk of experiencing poor health quality ... sent to prison. The finding, which accounted for other ... rate of imprisonment may be independently imparting enduring physical ... people were children when this happened, and it was ...
(Date:8/1/2014)... Pass, OR (PRWEB) August 01, 2014 ... also called hydrotherapy – was fundamental to the practice ... and water researcher Sharon Kleyne, water therapy has been ... a time when climate change, water shortages, drought and ... related diseases, the Sharon Kleyne Hour Power of Water ...
(Date:8/1/2014)... 01, 2014 Did you know that July ... Awareness Month is to raise awareness across the country and ... for, sarcoma. According to the American Cancer Society, nearly 5,000 ... while 12,000 new soft tissue sarcomas will be diagnosed. ... tumors as they are other kinds of cancer,” said Dr. ...
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