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Tag: "patches" at biology news

Survival of the rarest: Fruit flies shed light on the evolution of behavior

... and they are also more likely to explore new food patches than sitters. The researchers explored the evolutionary mechanism that favours the persistence of both of these types in nature. Doctoral student Mark Fitzpatrick raised colonies of flies with different ratios of rovers to sitters and different co...

Navigable nanotransport

...other patches. Once they reach a certain size, the patches bend around and close off to form hollow spheres, which can then be filled with guest molecules. The size of the spheres is very uniform and depends largely on the solvent in which the linking reaction takes place. The researchers used this method to...

Recently discovered species gain protection

...sized bird restricted to a few tiny remnant forest patches in the Antioquia Department of Colombia, in the Central Cordillera of the Andes. It is so restricted in its distribution that it evaded discovery until 1999, and has been identified by the Alliance for Zero Extinction as a priority conservation spec...

Engineering the heart piece by piece

...heir success in growing pulsing, three-dimensional patches of bioengineered heart muscle, or BEHM. That paper...?raising the possibility of engineering customized patches to meet the specific requirements of patients. All of these approaches are described in the recent r...

Scientists crack rhino horn riddle

...y study now has revealed an interesting clue: dark patches running through the center of the horns. The te... The study also found that the melanin and calcium patches appear in yearly growth surges but the effects of temperature, diet and stress on the growth are sti...

Some butterflies travel farther, reproduce faster

...'s in the genes The fritillary live in distinct patches -- rocky outcroppings containing plants that serve...ae to spend the winter. There are about 4,000 such patches on the Ålands, with about 500 patches occupied in a given season, Hanski has found. Some of the patc...

Extraordinary life found around deep-sea gas seeps

...ng at the core of the seeps. Around the rocks were patches of blackened sediment and pockets of white bacterial mats. Most sites also had extensive shell beds consisting of live and dead shells of various types of clams and mussels. These were fringed with stands of another type of deep-sea tube worm that i...

Smoking changes brain chemistry

...hs later. Patients were encouraged to use nicotine patches during the initial six weeks of smoking cessation;...as typically higher in the smokers who did not use patches compared to those who did. The metabolite tCr plays an important role in supplying energy to the mus...

Sandia research to focus on early detection of harmful algal blooms

...producers at the depths of the food web. The dense patches (or "blooms") that sometimes accumulate near the surface of the water, however, can produce potent neurotoxins that are then transferred through the food chain, accumulating in zooplankton and shellfish, eventually harming or even killing marine mamm...

Agriculture and tropical conservation: rethinking old ideas

... how much forest is left, but what's between those patches that are left, and will it support the necessary m...ions occur, which they inevitably do?" If forest patches are separated by barren pastures or fields of single crops, such as soybeans, then monkeys, birds, a...

U-M scientists identify major psoriasis susceptibility gene

.... People with psoriasis develop thick, flaky white patches on their skin and scalp. The disease is disfiguring and can have a negative effect on quality of life. About 25 percent of people with psoriasis eventually develop psoriatic arthritis, which can be severe. Unlike diseases caused by a mutation in ju...

Researchers test new way to quit smoking

...moke-free if they begin using replacement nicotine patches or gum in the weeks before they quit cigarettes. ... them with a nicotine substitute, such as nicotine patches or chewing gum. But some recent small-scale studies have suggested that the earlier use of a nicoti...

Genetic study shows humans have pushed orangutans to the brink of extinction

...ediate steps are taken to reconnect remnant forest patches and halt further deforestation." ...

Research: Snails were overlooked contributors to marsh destruction

... that the snails moved from finishing off stressed patches to decimating large pockets of otherwise healthy m...in remnants of healthy marsh. After 14 months, the patches were "robust and green" compared with denuded areas where snails moved through. ...

Cells from amniotic fluid used to tissue-engineer a new trachea

...om the amniotic fluid that surrounds it, to create patches to fix birth defects -- in this case, even before birth. Pediatric surgeon Dario Fauza, MD, who led the study, will present the team's work on OOctober 8 at the American Academy of Pediatrics annual conference in Washington, DC. Amniotic fluid is...

Gene therapy may protect normal tissues during radiation retreatment for lung cancer

...nough to eradicate all the fauna and that desolate patches were recolonised from surrounding areas. But our research confirms that the destruction was wholesale with very little surviving. Even today calving icebergs ploughing across the seafloor destroy everything in their path. Imagine the impact of ice sh...

Seafloor creatures destroyed by ice action during ice ages

...nough to eradicate all the fauna and that desolate patches were recolonised from surrounding areas. But our research confirms that the destruction was wholesale with very little surviving. Even today calving icebergs ploughing across the seafloor destroy everything in their path. Imagine the impact of ice sh...

Prescription pain patch abuse blamed for increase in deaths

...ed sought a state of euphoria by applying multiple patches simultaneously. It is not always clear from the law enforcement records where people who overdosed obtained the drug, whether from a prescription of their own or from one that had been stolen or otherwise not used according to doctor's instructions,...

Techniques available to detect soil that inhibits destructive soybean pest

...s. Plants with severe, visible damage can occur in patches in highly infested fields. There are no pesticides that will eradicate soybean cyst nematode, which also preys on other legumes and some grasses. ...

Molecular mechanism of feather formation found

...y-old chick embryos. The virus infected only small patches of cells and allowed Harris to locally examine the effects of the treatment on barb patterning during feather development. To assess the specific role of Bmp2 in regulating Shh expression, Harris tricked the cells into believing that Bmp2 was signal...

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