Tag: "yellow" at biology news
Plants vs. disease: 'Trench warfare at the molecular level'
...ease produces black lesions, often with a discrete yellow
halo that can appear on the plant leaves and cause them to curl. Growers had been instructed to spray a copper-based pesticide to ward off bacterial speck. But, over the years, the disease became resistant to the copper, rendering the pesticide vir...
Catnip repels mosquitoes more effectively than DEET
...it, in Starkville, Miss. While they used so-called yellow
fever mosquitoes ( Aedes aegypti ) one of several...f mosquitoes. Aedes aegypti, which can carry the yellow
fever virus from one host to another, is found in most parts of the United States. Yellow fever itse...
Dentists abuzz over cavity-prevention potential of honeybee product
...ing a device like a putty knife to scrape the dark yellow
or brown, caulk-like substance from hives. His first experience left him barely able to walk, as he received about two dozen stings around his ankles from angry bees because his black socks triggered the bees defensive behavior. Brushing the pain as...
Invasive gobies prevent sculpin spawning, impacting perch food chain
...ttled sculpin-a fish that is the major part of the yellow
perch's diet--disappear. The gobies, an alien nui...y may have a negative impact on the food supply of yellow
perch, an important sport fish in Lake Michigan. At this point, we don't know whether the round gob...
Agricultural pests may threaten prairies
...rs. The beetles seem to favor sunflowers and other yellow
composite flowers. The researchers studied corn rootworm beetles in McKnight Prairie, which is in southeastern Minnesota. The 33-acre prairie is long and narrow (about 560 feet across), and is completely surrounded by agriculture. The northern edge ...
'Smart bandage' diagnoses danger before infection takes hold
...ground beef, may be able to change to a cautioning yellow
if the meat is contaminated. Or, in Third World countries where pollution of drinking water is a constant threat, plastic cups or water jugs could be designed to turn a bright red if there are dangerous pollutants present. "We may even see this tech...
African bone tool discovery has important implications for evolution of human behavior
...at least as old. Furthermore, a distinct sterile yellow
sand horizon lies above the dark, anthropogenic (h...graphic break because any penetration through this yellow
sand by younger materials from above would be clearly visible and the sand layers are clearly undist...
Vaccine protects against fatal West Nile complication
...rently approved for use in the United States and a yellow
fever vaccine. "If we infect hamsters with the...t protection was provided by the JE vaccines. The yellow
fever vaccine protected the hamsters partially, but not as well. While this research shows that ...
Flower chemicals attract some insects but deter others with toxic warning
...are fully open, they appear to humans as a uniform yellow
disk. But to insects with ultraviolet-sensitive eyes, the disk is highlighted by a dark, ultraviolet-absorbing center, giving the flower a bull's-eye. While Gronquist performed analyses that led to isolation of the chemical compound, the biologists d...
New Biofilm Research Center will explore the wonderful world of slime
Whether it's the disgusting yellow
film coating your teeth or the slippery crud clogging your kitchen sink, slime is something most of us want to eliminate, not cultivate. But for scientists, microbial slime or "biofilm" has become the focus of intense interest. This week, members ...
Prescribed burning: Do we really know what we're doing?
...West, such as northernArizona. Historically, these yellow
pine forests had frequentsurface fires that resulted in an open-canopy mosaic of oldand young stands of trees. Fire suppression led to an unnaturalbuildup of small trees, and dead branches and needles on theforest floor, which then fueled catastrophi...
Science study explains the sexy glow of parrot plumage
...g in the birds by applying sunscreen to the bright yellow
crown feathers of males and females, to reduce the UV absorption of the plumage, consequently "dulling" their fluorescence. The result: Both male and female budgies showed a significant sexual preference for brightly glowing (fluorescent) companion...
Deep sea creatures collected for studies
...scarlet-colored tube worms, 12 white crabs, and 30 yellow
mussels are now on the campus in tanks that simulate the pressure of the deep ocean. Although tube worms have been collected before, this marks the first time that deep sea crabs and mussels have been brought back alive from the deep. The animals wer...
High tech movies reveal information transfer within cells
...d vacuoles from yeast, the test tube contents turn yellow
whenever membrane fusion occurs. This allows us to look for chemicals that that promote or inhibit fusion."...
High hit rate in drug development
...er plates to the naked eye: living cells convert a yellow
into a violet dye. The Figure also shows the structure of the target protein Cdc25. Picture: MPI of molecular Physiology/Schulte/Herter As the next step the Dortmund scientists will analyse the major classes of protein domains and their natural lig...
Scientists solve first flavivirus structure
...s insect-borne diseases such as dengue, West Nile, yellow
fever, tick-borne encephalitis and St. Louis encephalitis. Together these viruses cause millions of cases of human illness each year. Several viruses from this family also are among a select group of viruses being studied to counteract potential biot...
New method used to transfer genes into mouse
...rs injected a transposon containing the gene for a yellow
coat color into a mouse embryo, resulting in a genetically modified mouse. "This is a new type of technology, an entirely different way to make genetically modified animals," said David Largaespada, Ph.D., an assistant professor in the university's d...
Hemorrhagic fever viruses examined as potential bioweapons
...sa fever, New World Arenavirus, Rift Valley Fever, yellow
fever, Ornsk hemorrhagic fever, and Kyasanur Fores...f infected patients. There is a vaccine to prevent yellow
fever, but it is not widely available and it would not be useful to provide protection after exposur...
Botanists discover new conifer species in Vietnam
...n Vietnamese cypress. Its closest relative is the yellow
spruce of the U.S. Pacific Northwest, also known a...usly classified as Chamaecyparis nootkatensis, the yellow
spruce is now classified as the second species in the new genus Xanthocyparis. The new species is d...
Sprawl may threaten wildlife in reserves
...ction and population growth of American robins and yellow
warblers at two types of sites: low-elevation cot...rtunity to renest. The researchers also found that yellow
warblers may already be threatened by development. The results suggest that even though more females...
1 2 3 4 5 6 7