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Tag: "altitude" at biology news

Tundra disappearing at rapid rate

... Science, reconstructed changes in the density and altitude of treeline forests in southwestern Yukon over the past 300 years. Using tree rings, they were able to date the year of establishment and death of spruce trees and reconstruct changes in treeline vegetation. The study is published in the "Journal of ...

Is there a pilot in the insect?

...ect changes speed, this reflex will make it change altitude so that ratio remains constant. Adjusting the spee... flow regulator will constantly force it to reduce altitude so that the optic flow always remains at the reference value. The insect has to make a forced landin...

Scientists discover new species of distinctive cloud-forest rodent

...net." The new rodent was discovered at an altitude of 6,200 feet. Little is known about its lifestyle because subsequent efforts to locate and observe the animal were fruitless. I. barbarabrownae belongs to a family of rodents known as "spiny rats" because most of the species in that family bristl...

Viagra improves high altitude exercise performance up to 45% for some

...at sea level. Ten cyclists who took sildenafil at altitude collectively lowered the time it took to cover six...f the arteries when the cyclists were at simulated altitude of 12,700 feet. But the researchers discovered that these improvements occurred largely because so...

Atmospheric ozone recovering in mid-latitudes, report shows

...decade in the 11- to 15-mile (18- to 25-kilometer) altitude region to the Montreal Protocol, enacted in 1987, ...er than atmospheric chemistry. The changes in this altitude range - below the region where ozone-depleting gases derived from human activity are thought to caus...

Sociality of sweat bees evolved simultaneously during climate change

... even within species as a function of latitude and altitude such that species and populations at low latitudes and in warmer regions are often fully social, whereas they are solitary at higher latitudes and altitudes, which are colder." Warmer regions have longer growing seasons, he explained, which allows ...

Bats use touch receptors on wings to fly, catch prey, study finds

...sitive receptors on bats' wings help them maintain altitude and catch insects in midair. His preliminary findings, presented at the recent Society for Neuroscience meeting, revive part of a long-forgotten theory that bats use their sense of touch for nighttime navigation and hunting. The theory that bats fly...

Sensor web simulation investigates technique to improve prediction of pollution across the globe

...s from the Earth's surface to roughly the cruising altitude of a passenger jet - about 40,000 feet. In some cases air pollutants have natural causes such as lightning induced wildfires that can emit large plumes of particulates into the troposphere. Fossil fuel burning in industrial areas and vehicular traffi...

Expanding forests darken the outlook for butterflies, study shows

...ity and smaller meadows. According to Roland, the altitude of the tree line in the Canadian Rockies is rising--likely due to global warming--and, outside of national parks, forest fires are usually suppressed. These factors are combining to create larger forests and smaller alpine meadows. This is bad news f...

Going To Extremes To Improve Human Health

...er, is a 12-foot-square room capable of simulating altitude up to 18,000 feet, holding temperature constant at a set point between 14 and 122 degrees Fahrenheit, and controlling humidity anywhere from 10 to 95 percent. The chamber is so finely tuned that it can swing from the coldest to hottest setting in 30 ...

Taking the piste out of Alpine vegetation

...feel the heat of climate change, developing higher altitude runs and using more artificial snow to keep skiers happy. As this happens, Wipf and her co-workers want ski resorts to become more environmentally sensitive. "We recommend that environmental goals should be established in ski resort management. In p...

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(Date:4/23/2014)... pair of bioethics experts have added "playwright" to their ... in grappling with an onslaught of ethical issues as ... the human genome was first sequenced. , Until ... W. Bush have been performed for, and by, their ... conferences, meetings and in classrooms. With Oxford University ...
(Date:4/23/2014)... ripping open a dinner roll, a fuel cell catalyst ... hydrogen molecule. Now researchers have captured a view of ... its hydrogen feast. The view confirms previous hypotheses and ... better for alternative energy uses. , This study is ... hydrogen halves end up in the structure of a ...
(Date:4/23/2014)... source of a unique rhythmic sound, recorded for decades ... the Antarctic minke whale ( Balaenoptera bonaerensis ). First ... who thought it sounded like a duck, the bio-duck ... Southern Ocean, but its source has remained a mystery, ... of researchers deployed acoustic tags on two Antarctic minke ...
Breaking Biology News(10 mins):Bioethicists use theatrical narratives to bridge the gap between society and science 2Bioethicists use theatrical narratives to bridge the gap between society and science 3Halving hydrogen 2Halving hydrogen 3Halving hydrogen 4Scientists identify source of mysterious sound in the Southern Ocean 2Scientists identify source of mysterious sound in the Southern Ocean 3
(Date:4/23/2014)... the depletion of self-control, according to research published in ... for Psychological Science. , Self-control can be difficult ... on a boring textbook are hard things to do. ... Exerting self-control for a long period seems to "deplete" ... , "It is as if self-control is a limited ...
(Date:4/22/2014)... a popular high school sport in the United States ... by researchers in the Center for Injury Research and ... compare and describe the occurrence and distribution patterns of ... school athletic training setting among adolescents and teens. , ... Athletic Training , examined data relating to adolescents 13-19 ...
(Date:4/22/2014)... researchers have characterized a set of clock genes that ... types of species, from flies to humans. Over 15 ... there are more. A team from the Perelman School ... big-data approaches could find them. , To accelerate ... professor of Pharmacology and first author Ron Anafi, MD, ...
(Date:4/22/2014)... percent of all lung cancers are small cell ... develop resistance to chemotherapy. However, researchers at Virginia ... insights into the mechanisms leading to this resistance ... Chemotherapies work primarily by mediating B-cell lymphoma 2 ... cell death. Depending on their function, this family ...
(Date:4/22/2014)... Washington, DC (April 22, 2014) The International ... May 22-26 in Seattle, Washington. The theme of ... life" means in a networked and digital society. ... and attended by over 2,200 Communication scholars representing ... largest scholarly international communication conference in the world. ...
Breaking Medicine News(10 mins):Health News:ADHD drug may help preserve our self-control resources 2Health News:New study finds 2.5 million basketball injuries to high school athletes in 6 seasons 2Health News:New study finds 2.5 million basketball injuries to high school athletes in 6 seasons 3Health News:Bioinformatics profiling identifies a new mammalian clock gene 2Health News:Scientists pinpoint protein that could improve small cell lung cancer therapies 2Health News:International Communication Association to hold Annual Conference in Seattle, Washington 2
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