Tag: "suspended" at biology news

New chemical process can separate, manipulate carbon nanotubes

...ues add water-soluble diazonium salts to nanotubes suspended in an aqueous solution. The diazonium reagent extracts an electric charge and chemically bonds to the nanotubes under certain controlled conditions. By adding a functional group to the end of the reagent, the researchers can create a "handle" that t...

Infants more vulnerable to serious brain injury from falling than previously thought

...th higher falls and harder surfaces. The doll was suspended from a scaffold and allowed to fall 134 times from heights of 1, 3 and 5 feet onto surfaces commonly found in a home: a concrete floor, .25-inch-thick carpet padding, and a 4-inch-thick foam pad, simulating a crib mattress. Volunteers also shook the ...

Discovery may help in war against fire ants

...he host's skin forms a bag, which at this point is suspended by a thin stalk. Later, the larva develops into another stage and the stalk eventually pinches off from the overlying epidermal layer. The second-instar larva moves passively through the host, eventually residing into the abdomen. It goes through two...

DFG presents the new MAK and BAT Value List 2003

...uspected carcinogen and the previous MAK value was suspended because of genetoxic activity. The commission reco...or 1,4-dichlorobenzol, ethylbenzol and phenol were suspended because of (possible) carcinogenic properties of these substances. Biological guideline values (BLW)...

Automated imaging of brain tissue, high-quality glimpses inside arteries

...red to a substrate. As samples of genetic material suspended in a fluid are washed past the probe strands, DNA materials that contain certain sequences of interest bind to the probe strands. Because the probe strands have characteristic mechanical resonant frequencies in the terahertz range, and the frequencie...

Cancer risk clouds gene cures

...A advisory committee last week recommended that 27 suspended gene therapy trials should proceed only if gene therapy is the only option. Similarly, Great Ormond Street Children's Hospital in London will treat X-SCID boys only if "death is otherwise inevitable". The French trial remains on hold....

Fertility study shows increased estrogen shortens window of implantation in mice

...loping embryo, or blastocyst, present would remain suspended in a kind of dormancy. It was at this stage that the researchers were able to parse estrogen's effect on the implantation process. They found that a single injection of either 3, 10, or 25 nanograms of estrogen was capable of initiating implantation...

Kiss mistletoe goodbye this season for better tree health

...ts yuletide custom of suggesting a kiss underneath suspended mistletoe apparently is linked to English tradition. But arborists have a decided lack of love for this parasite, stemming from the fact that mistletoe is especially hard to kill without harming the tree in the process, Watson explained. "One can rep...

Microorganisms are cleaning up Boston Harbor, UMass study finds

...romatic hydrocarbons, or PAHs, could biodegrade if suspended in water. But it was also believed that once PAHs sank into the silt at the bottom of the harbor, they could not be oxidized or degraded a theory that the new study challenges. "This is important because it demonstrates that the self-purification ca...

INEEL competes successfully for DOE EMSP funding

...ks, flow conditions, and pollutants that attach to suspended particles. A separate team plans to create tiny particles of material that degrade solvents, and study how well they can be put into the subsurface and be controlled to move to where solvent contaminants exist. Tests will show how well engineered par...

Experimental 'gene switch' increases lifespan with no ill effects

...hese conditions, juvenile worms go into a state of suspended animation, known as the dauer, and reproduction is delayed until food is restored and they come out of this phase. But the new study shows that if the gene is not inhibited until the organism already is a young adult, the worms gain increased longevi...

Colorado U. to fly hardware, experiments on space shuttle, space station

...g in two-dimensional sheets, culturing them in the suspended state of microgravity causes their behavior to mimic normal, functioning kidney cells. Previous BioServe flights have documented changes in kidney cells and how the genes are expressed to produce particular proteins, said Stodieck. "Now we want to ...

Deer flies a biting problem? Oddly, 'trolling' may be just the ticket

...lastic flowerpot, covered with sticky material and suspended upside-down on a pole, was said to entice and capt... tried black, tan, blue and shapes of other colors suspended from various heights. After numerous experiments, the trap that wooed the most deer flies proved to ...

Communities dealing with hazardous waste need independent adviser, UCLA engineering professor says

...te and was amazed because they actually had houses suspended and there was nothing under the house," he said. By then, the Del Amo Action Committee had already been formed and "an adversarial relationship between the community and the EPA was not helping to ease the community fears," Cohen said. Up until that...

Bandage could repair damaged tissues

...ade from gelatin, turns into a solid and has stuff suspended in it. But, instead of containing marshmallows and chunks of fruit, it has molecules and cells that repair damaged tissue. By using modified gelatin and polymers, Kao, a University of Wisconsin-Madison pharmaceutical science and biomedical engineerin...

May media highlights: GEOLOGY and GSA TODAY

...ealand and Taiwan, are sources of large amounts of suspended organic matter to the oceans. The short length, steep gradient, and mass wasting enable these rivers to transport water and sediment quickly from the mountains to the ocean. Because the residence time of this sediment may be very short compared to la...

Subjects lying face up reveal a reduced ability for 'nasal air conditioning'

... posterior nasopharyngeal wall, and the sensor was suspended in the airstream facing the opposite nostril. Flexible nasopharyngoscopy was then performed to verify the position of the probe. The nostril containing the probe was then occluded anteriorly with a wax plug. After that, a second series of baseline me...

Animal study finds embryonic stem cells can repair heart muscle

...s were "marked" with green fluorescent protein and suspended in a medium. ES cell transplantation was then performed within 30 minutes of the MI induction; injections were made at three separate sites in the heart, one directly where the MI took place, and two in the heart muscle bordering this area. The contr...

December Media Mighlights: GEOLOGY and GSA TODAY

...maller grains, because small grains tend to travel suspended in the water column and impact the riverbed less frequently. Experimental erosion rates were also compared to rock strength measurements to reveal, for the first time, a quantitative relationship between rock strength and rock resistance to erosion. ...

Nanoparticles in air bad news for people

...consist of tiny solid or liquid droplets or both suspended in the air. Air polluting particulate matter ranges in size from a few nanometers to several hundred micrometers, and Cheng noted that the smallest particles have a very different chemical composition than larger particles. Also, new emission control...

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