Tag: "brown" at biology news

Primates harvest bee nests in Ugandan reserve

...nded to scientific names, except for a black and a brown form of Meliponula ferruginea.Honeybee (Apis) nests were numerous compared to other sites in the tropics, whereas honey-making stingless bee nests were relatively scarce. Nest abundance did not vary with altitude, nor did pollen collection or the se...

Tiny polyps gorge themselves to survive coral bleaching

...nt. Once that happens, the symbiotic algae and the brown or green photosynthetic pigments inside are lost. The result is a "bleached" white coral. "In most cases, corals get 100 percent of their daily metabolic energy needs from the algae. Once they are gone, the coral polyp is left with only two alterna...

Hantavirus found in African wood mouse

... are carried by a number of rodents, including the brown rat, the striped field mouse, and the yellow-necked mouse. If left untreated, mortality can be as high as 15 percent. Hantavirus was not seen in the Americas until 1993, when it killed approximately 20 people in the western United States. The Americ...

For some young fish, early gene expression is a clear harbinger of fated lifestyle

...ied gene expression in two species--strains of the brown trout, Salmo trutta, and a strain of the Atlantic ... different levels. At the same time, two sedentary brown trout populations from Denmark and France, despite having diverged half a million years ago, showed ...

Exotic crab poised for widespread UK invasion

...use its claws are coated with small clumps of dark brown fur, or mittens - has the potential to establish itself in all major UK estuaries in several years time. Mitten crabs are unwelcome because they prey on protected UK native species such as the white-clawed crayfish and salmon eggs and fry. They al...

Evolution mystery: Spider venom and bacteria share same toxin

...e toxin is uniquely found in the venom cocktail of brown or violin spiders, including the brown recluse, and in some Corynebacteria. The toxin from the spider's venom can kill flesh at the bite si...

How nice, brown rice: Study shows rice bran lowers blood pressure in rats

...2; It’s still not clear whether simply eating more brown rice, which retains some of its bran, would reduce the risk of heart disease. However, previous research in humans, as well as animals with high cholesterol, does suggest that certain fractions of rice bran can lower levels of unhealthy LDL cholester...

Tetracycline plus teeth equal gray smile

...eeth and creates a permanent dark and deep gray or brown stain over the entire tooth. Other stains appear in a pattern of horizontal stripes of varying intensity. Also, during the same time period (before1980) many children may have been given the drug and had the same stains. Often dentists can tell if a ...

First surveys of Tanzanian mountains reveal 160+ animal species, including new & endemic

...itter under the forest canopy. The smooth-skinned, brown patterned frog measures about 2.25 inches from snout to bottom. "Surveying just one section of the Eastern Arc, we discovered a little frog no one knew existed," said Nike Doggart, lead author of the article and Technical Advisor, Tanzania Forest Co...

Fish virus in Northeast spreading to other fish species

...s also have tested for the virus in lake sturgeon, brown bullhead, rock bass, yellow perch, pumpkinseed and black crappie. VHSV causes fatal anemia and hemorrhaging in many fish species but poses no threat to humans or other animals. "The situation right now is that we still have fish dying in Lake Ont...

Gatekeeping: Penn researchers find new way to open ion channels in cell membranes

Using an enzyme found in the venom of the brown recluse spider, researchers at the University of Pennsylvania School of Medicine have discovered a new way to open molecular pores, called ion channels, in the membrane of cells. The research team ?Zhe Lu, MD, PhD; Yajamana Ramu, PhD; and Yanping Xu,...

Female guppies risk their lives to avoid too much male attention

... female attention, while female guppies are a dull brown color. The researchers show that female guppies might use this color difference to their advantage, venturing into the deep water where predators lurk. The males' bright coloring also attracts predators, making it too dangerous for them to follow. ...

Ring-like formations in drying DNA drops could affect hybridization studies

...t from spilled drops that have dried, in which the brown stain is not evenly distributed, but instead concentrated at the edge. Now, a team led by Gerard Wong, a professor of materials science and engineering, physics, and bioengineering at the University of Illinois at Urbana-Champaign has found the same ...

Scientists describe new African monkey genus ?first in 83 years

... new genus. Kipunji have light-to-medium grayish brown fur, with off-white fur on the belly and the end of their long, mainly curled-up tail. They have a "crown" made up of a very broad crest of long, erect hair. Adults make a distinctive, loud, low-pitched honk-bark. An omnivore, Kipunji eat leaves, sho...

Expanding waistlines triggered by your genes

...sues around their bellies were very small, but the brown adipose tissue, a specialized fat depot to regulate body energy consumption, was unaffected. Importantly, the research team also discovered that adipocyte differentiation in conventional two-dimensional (2-D) cell culture is different from three-dim...

Free radical cell death switch identified

...ssor of pathology. The skin of a bitten apple will brown because of its exposure to air, and in some ways that is a good metaphor for the damage that oxidative stress is causing to neurons and other types of cells over time. Humans and other organisms depend on oxygen to produce the energy required for ce...

Blue eyes -- A clue to paternity

...ildren will have blue eyes. If both parents have brown eyes, a quarter of the children will have blue eyes, and three quarters will have brown eyes. The brown eye form of the eye color gene (or allele) is dominant, whereas the blue eye allel...

Endangered shortnose sturgeon saved in Hudson River

... American alligator, American peregrine falcon and brown pelican, have recovered. "Recovery is very rare," said Bain, who has been monitoring the shortnose sturgeon's population since the mid-1990s and has access to data on the populations since the 1970s. "The nature of this species, its habitat and evi...

Chemicals in brown algae may protect against skin cancer

... The animal study indicates that chemicals called brown algae polyphenols (BAPs), which are found in a type of brown marine seaweed, might protect against skin cancers caused by ultraviolet B (UVB) radiation. UVB ...

Instruction manual for creating a molecular nose

...re a type of G-protein coupled receptor taken from brown rats. The scientists were also able to prove that the odorant receptors maintained their biological functions by demonstrating the binding of odorants to the receptors. "We now have something akin to an instruction manual on how membrane proteins tha...

1 2 3