Tag: "sand" at biology news
A closer look yields new clues to why bacteria stick to things
...cteria stick to iron particles in soil, but not to sand
grains. Until recently, this has been explained by...ught that the tiny, negative electrical charges on sand
grains repelled the negatively charged bacteria, while the positively charged iron attracted them. ...
Termites repelled by catnip oil
...eir termite study, Peterson and Ems-Wilson infused sand
with catnip essential oil--the kind routinely sold...ed with sand. A two-inch barrier of catnip-treated sand
separated the termites in the top layer of untreated sand
from the pine. To test horizontal tunnelin...
Atomic force microscope powerful new tool for measurement of particle attraction
...material of silica glass is similar to the quartz sand
present in many soils. Cail plans to introduce actual bacteria in future experiments, but the focus of her presentation at ACS is the new method of measurement. "Sticking efficiency has not been measured experimentally before using the AFM. The pape...
Hormones, sand & terrorism
...pacts of dredging the ocean bottom for nourishment sand
that is used to build up eroded coastal beaches. T... beach to be economically feasible; 2) Nourishment sand
must be a suitable grain size, at least as coarse as the native beach; and 3) Nourishment sand
New age for Mungo Man, new human history
...es were dry, plants and animals were decimated and sand
dunes had spread across the plains," says Bowler. "The new dates reveal a rich tapestry of archaeological change that is rarely equaled elsewhere in the world and provides an ancient example of humans being forced to adapt to severe drought conditio...
Science picks-leads, feeds and story seeds (January 2003)
...will schedule the floods to make use of additional sand
and sediments from the neighboring Paria River. In the 1996 experimental flood, the USGS, the Bureau of Reclamation, and the National Park Service sent water roaring from Glen Canyon Dam to carry sediment downstream and restore beaches and sandbars ...
Biologists raising baby loggerhead turtles for conservation find disturbing gender trend
...rom the nest, we captured them, packed them in wet sand
from their beach and transported them," said Larry...der said. Such skewed sex ratios can arise because sand
temperature plays a strong role in determining the sex of turtles that develop there. Cooler tempera...
URI biologists study predator-prey relationship between sand shrimp and flounder
...negative impact on the survival of flounder is the sand
shrimp. URI Graduate School of Oceanography (GSO)... GSO doctoral candidate David Taylor. The common sand
shrimp lives in the Atlantic waters from Newfoundland to Florida and is an important component of es...
Engineers work on their SUNTANS as they track waves and beaches
...fy and often turn into breaking waves that pick up sand
and other material from the ocean floor. "Internal waves have even been known to move a ship from its anchorage," Street noted, citing a 1991 Coast Guard report that described how a breaking internal wave in Monterey Canyon may have contributed to a ...
GSA release 02-55: Dec. Geology & GSA Today media highlights
...story of freshwater habitats, particularly that of sand
or mud substrates, compare to that of soft bottom habitats in the marine realm? In less than 100 million years from the late Neoproterozoic (600 million years ago) into the Cambrian, marine animal life appeared and burgeoned from a few animals with a...
Polluted beach closures influenced by full moons and sunlight, surfer-engineer discovers
...ng will ruin a day at the beach like a sign in the sand
that reads, ''Warning: Contaminated Water. Unsafe for Swimming or Contact.'' According to the Natural Resources Defense Council, there were more than 13,000 closures and advisories at ocean and freshwater beaches in the United States in 2001 - the va...
Science picks leads, feeds and story seeds (October 2002 edition)
...derstand how seismic "waves" move through the deep sand
and clay layers of sediment that are characteristic of the Mississippi. The explosions will create seismic waves similar to what happens during a real earthquake. Scientists will use newly installed strong motion seismographs part of a national fi...
UNC, other universities will help NASA develop space-age materials
...ause a meteor particle even as small as a grain of sand
could puncture the hull of existing spacevehicles." Besides conducting research and developing technology, the institute will begin an education and training program along with the North Carolina Agricultural and Technical State University in Greens...
NASA turns to universities for research in space-age materials
...ause a meteor particle even as small as a grain of sand
could puncture the hull of existing space vehicles."...
Imaging apparatus characterizes drops in 'dirty' laboratory environments
..." Scheeline said. "Coal dust from experiments and sand
from the desert were all-too-frequent visitors." To protect delicate optical components, the researchers covered the optical system with plastic panels and pumped clean, dry air into the enclosure. "Despite months of experiments on coal dust combust...
Tiny, magnetic spheres may help overcome gene therapy hurdle
... tissue rather than sticking to it, like grains of sand
moving past stones in a fast-flowing river. Now, University of Florida gene therapy and biomedical engineering researchers have demonstrated a novel approach to the problem. In a July article in Molecular Therapy, they report attaching the adeno-asso...
Fungi help some trees weather acid rain, not all
...go. That's when electron-microscopy examination of sand
revealed tiny tunnels burrowed through the grains; the mini-miners turned out to be ectomycorrhizal fungi that can penetrate micropores in silicates and take up phosphorus, as well as calcium. Living in symbiotic relationships on some tree roots -- w...
Site of US Open at Bethpage is reducing pesticide use
BETHPAGE, N.Y. -- Forget the sand
traps and the water hazards. The real battle on Long Island's Bethpage State Park golf course, the site of this year's U.S. Open June 13-16, is making the putting greens free from fungal diseases, cutworms and weevils ---- and safe from the pesticide...
People linked to new sea otter diseases
...eniles. The worm is a shorebird parasite that uses sand
crabs as an intermediate host. Sea otters usually ...en these prey are scarce, an otter can eat several sand
crabs in a row. "Humans may have increased the prevalence of this disease by competing with otters f...
Protecting drinking water from disease transmission by means of zeolite filters
...o remove viruses from the water. Iron-oxide coated sand
was effective in removing viruses from water in the laboratory, but largely failed to do so in the field. Treated zeolite was an effective barrier in both situations. In the field, treated zeolite removed at least 99 percent of viruses from the water...
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