Tag: "shell" at biology news
Award-winning INEEL probe to help safely monitor hazardous waste sites
...in vapors and moisture through the casing's porous shell
or external ports. Most important, when researchers have collected data with one sensor, they pull it up and thread another sensor down, Clark says. The universally designed housing will accept a variety of probe sensors, each of which gives differe...
Ancient creature fossilized by the bacteria that ate it
...ed arthropod similar in shape to modern clams. Its shell
was made of chitin, a soft, fingernail-like substance that should have disintegrated after the creature died, long before it could fossilize. But the arthropod had no predators, so when it died of natural causes, the eubacteria decomposed...
Drilled shells show extinction's lasting effects
... Chione clams by slowly drilling ahole through the shell
wall. That process can take a week, while thesnails risk losing their prey to another snail or being attackedthemselves by fish, crabs or other predators. High levels of competition should favor faster feeding, said GeeratVermeij, professor of geolo...
Holes in fossil shells show effects of competition and evolution
...nails feed on clams by drilling a hole through the shell
to reach the soft body inside. Using a rasping ton...tail of chemicals to drill through the wall of the shell
takes several days, but under stress of competitive pressure, snails attack through the shell
When cobras spit, there's not a dry eye in the house
...y a spitting cobra which had just emerged from its shell
it practically spat at me out of its shell."...
Harnessing microbes, one by one, to build a better nanoworld
...s say, to attach microscopic gold particles to the shell
of the bacterium, making it more like a nanoscale gold wire. Hamers believes the new work could be the basis for bringing nanotechnology and biology together in unprecedented ways. Moreover, the ability to routinely and easily capture and analyze ind...
Mutation in clams protects against paralytic shellfish poisoning but raises human health risk
...describes differences in the responses of two soft shell
clam populations -- one in the Bay of Fundy and the other in the Lawrencetown estuary in Nova Scotia -- to saxitoxin as well as tetrodotoxin, a powerful toxin derived from the puffer fish. The lead author is V. Monica Bricelj of the Institute for Ma...
Washington University chosen as NIH Program of Excellence in Nanotechnology
...her lab members have been making for years called, shell
cross-linked nanoparticles (SCK), or other nanoscale materials being developed in the laboratories of Jean Frechet (UC-Berkeley) or Craig Hawker (UC-Santa Barbara), will be used as carriers for diagnostic imaging agents and also therapeutics. Add ...
Cure for common cold will need to wiggle to work, scientists say
...mmy inside the proteins that form the virus' outer shell
and alter them to the point where they cannot comp...else - it's the bug of a hundred faces." The viral shell
also changes shape during the life cycle of a single rhinovirus particle. One part of the shell
Scientists find a maturity gene
... "Teenagers are very pupal they go inside their shell
and withdraw," Thummel says. "Steroid hormones take over your kids, and they look very different and behave very different than they did previously. It happens more rapidly in insects, but they go through a transformation in very much the same way." ...
Prehistoric decline of freshwater mussels tied to large-scale maize cultivation
... Warren and Haag used survey data from prehistoric shell
middens -- refuse heaps of shells discarded after eating -- to examine differences in the abundance of Epioblasma species before and after maize cultivation started in the Southeast. They compiled data from both published and unpublished archaeologic...
Virginia Tech fisheries department releases cultivated mussels at Nature Conservancy site
...Also released were the adults of the fluted kidney shell
mussel, which is a federal candidate for the endangered list, and stocking adults of rabbitsfoot mussels, which are endangered. Why are mussels so important? Mussels are key indicators for water quality. They help clean the water by filtering and pro...
Oceans turning to acid from rise in CO2
...ve the acidic water could interrupt the process of shell
and coral formation and adversely affect other organisms dependent upon corals and shellfish. The acidity could also negatively impact other calcifying organisms, such as phytoplankton and zooplankton, some of the most important players at the base o...
Fundamental discovery -- bone fracture
...ized structures together when studying the abalone shell
six years ago. "It's truly remarkable to find the same fundamental mechanisms operating in bone," said Morse. He noted that these mechanisms give young healthy bone its tremendous resiliency and resistance to fracture, and actually help heal sm...
New discovery blurs distinction between human cells and those of bacteria
... the building blocks of the carboxysome, a protein shell
which is the best-studied microcompartment." The U... is how tightly packed they are. That tells us the shell
plays an important role in controlling what comes in and goes out. When we saw how the many hexagons...
VCU research: Magnetic nanoparticles for potential cancer treatment
...construct the core-shell structure and learn which shell
materials are most ideal for biomedical applicatio...netic material like iron or iron alloys, while the shell
can be a mixed metal ferrite with tailored resistivity. "Ferrites (iron oxides) are used in many app...
Oysters: The natural way to protect our shores
...irements would likely be reduced on created oyster shell
reefs as opposed to other heavier shoreline protec...rs evaluated the effectiveness of six experimental shell
reefs on both low and high wave energy shorelines in coastal Louisiana. The areas chosen were condu...
Why are birds' eggs speckled?
...as of shell, with darker spots marking yet thinner shell
than paler spots, and females nesting on low-calcium soils, laid thinner-shelled, more-spotted eggs than those on high-calcium soils nearby. Pigmentation may offer a way to assess eggshell quality....
Abalones along Pacific coast may owe their huge, dinner-plate size to sea otters
...nes and pound on the underwater abalones until the shell
margins break, then pry the abalones off the rocks...nto more open spots, even developing a more peaked shell
since they no longer needed a slim shell
to hide in crevices. "We got a taste for abalone in the abs...
DNA barcodes put to the test
...oup, the ubiquitous, tropical marine cowries whose shell
can command over $30,000. Meyer and Paulay found that while the barcode worked well for identifying specimens in highly characterized groups, it was much more error prone when used to discover novel species. For most animals, the DNA barcode consis...
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