Tag: "chamber" at biology news

Cornell Researchers Precisely Date Wood From Ancient Tomb In Turkey

...wn. They report that logs used to build the inner chamber of the Midas Mound Tumulus, a massive tomb named for King Midas of the Phrygians and located at the Gordion archaeological site, were cut in 718 B.C. "That is not plus-or-minus anything; it is a date 'to the year,'" said Cornell doctoral student Mary...

Human-Like Ability, Categorical Perception, Found In Insects

...y make up their minds would be tricky. His flight chamber experiments were showing that playback sounds mimicking cricket calls made the tethered insects "fly" toward the speaker. And sounds in the bat's ultrasound range made the crickets veer away from the speaker. Still, he couldn't very well ask the cr...

Recruiting Mole-Rats

...scout dropped the sample in the corner of the nest chamber without consuming it." The chirp-and-wave recruitment maneuver set off mini-stampedes of mole-rat recruits, and the biologists were ready. They had constructed their plastic labyrinth with several alternative food sources -- in addition to the ones ...

A Drug Pump On A Computer Chip

... Huffs prototype consists of a rectangular silicon chamber with one of the outer walls made of two thin layer...ing that causes the metal to flex. This forces the chamber to expand and contract. The expansion pulls fluid into the chamber through an intake valve, and the ...

Study Focuses On How Plants Help Toxic Pollutants Travel Around The World

...tained by Calspan SRL Corp., theenvironmental test chamber is one of the largest such facilities in the Unite...ilitary ordnance test facility, the interiorof the chamber measures 9 meters in diameter and 9 meters high -- as tall as athree-story building. "It had...

Colorado State Anthropologist Finds Fossil Treasures In Africa

...rrying drills andother excavation tools. The main chamber below the Drop Room, known as the atrium, consists of spectacular stalactite formations. The atrium's ceiling iscovered with a rock matrix containing the bones of small mammals. To access the second chamber, Waddle and the others must pass through a...

Colorado State Biology Professor Says Fatty Acids, Not Shadow, Determine Outcome Of Groundhog Day Feb. 2

...its to biology Professor GregFlorant's hibernation chamber at Colorado State. About 20 marmots, relatives ofthe groundhog, are hibernating in the chamber as part of an extensive researchproject. The dark chamber has a temperature of about 5 degrees and m...

New Research Suggests REM Is About Eyes Not Dreams

...eous humor, the clear watery liquid in theanterior chamber just behind the cornea, needs to circulate to brin...d eye movementsimply serves to "stir" the anterior chamber and prevent corneal suffocation. In the 1950s, research found that sleepers could often reca...

MIT's Mini Respirator Breathes Life Into Mutant Mice

...nimal's neck seals thechamber. The pressure in the chamber is then oscillated up and down, causing theanimal'...pistons that drive the pressure fluctuationsin the chamber prevent the application of too much pressure, which can close theanimal's airways. In addi...

Possible Trigger For Heart Failure Identified In Lab Animal Studies

...h heart failure led to dilation of the mainpumping chamber of the heart in laboratory rats, as well as depression of themain pumping chamber of the heart, thus mimicking what happens in patients withheart failure. These investigators also s...

Evaluation Of The Two Types Of Cardiac Pacemakers Indicates Only Modest Differences In Value

...ve merits of the twoforms of treatment--the single chamber (ventricular) pacemaker and the dualchamber (ventr... quality of lifetraditionally associated with dual chamber pacing was detectable only in a groupof patients with a heart condition known as sinus node dysfunct...

Keep Off The Grass - Reduce Air Pollution

...ntists from Monash and CSIRO set up a transparent chamber in a grass paddock in Gippsland, south-eastern Victoria. The scientists collected and analysed gases released by the grass over a two-year period. Their aim was to learn how emissions are affected by variations in temperature and light intensity, ...

UPMC Reports On New Liver Assist Device

...liver cells, as thepatient's blood circulates in a chamber with pig liver cells inside polymermembranes. The membranes allow toxins to pass through, but prevents proteins,and other cell byproducts from the pig cells to get into the patient's blood. "Initially, the agreement between UPMC and Excorp...

Early Restoration Of Blood Flow Following A Heart Attack Shown To Improve Long-Term Survival For Patients

...ritically important to preserving the main pumping chamber ofthe heart. The researchers say their study provi...n of the left ventricle -- theheart's main pumping chamber -- through early emergency treatment of heartattack saved another 9 lives per 100 in the first month...

Researchers Demonstrate That COX-2 Inhibits Angiogenisis In Tumor Cells

...ut in an in vitro model of angiogenesisinvolving a chamber with colon cancer cells on the bottom and endothelial cellson the top, separated by a porous collagen membrane. In a series of experiments, the researchers first compared colon cancercells that overexpress COX-2 to control cells. They found t...

Researchers Develop Fast Screening Method For Water Testing

... separated, the toxic molecules are sent through a chamber filledwith free electrons, which are quickly snapped up by the molecules. An electrodein a detection unit monitors the current produced by the electrons. The largerthe change in current as electrons are grabbed, the higher the number of toxicmolecule...

Radio Controlled Aircraft To Sniff Out Biowar Bacteria

...ersays. Every five minutes, water from the chamber is pumped over the sensor,which consists of four optical fibres, each with a tapered probe fixed to itscore (see Diagram). The probe is coated with an antibody to the spores of aparticular bioweapon bacterium. If the bacterium is present in the water...

Patented Bait System May Hold Answer To Combating Formosan Termites

...feedingchamber and then entices them into a second chamber that contains toxin-lacedmaterial, which the invad...with a small hole in the center. The first chamber contains a small amount of cardboard as anintroductory food source for the insects and a paper plug ...

Researchers Discover Why Some Athletes' Performances Fail To Improve On A Live-High, Train-Low Regimen

... athletes this summer, placing them in an altitude chamber one night a weekfor four weeks at simulated altitudes of 6,000 feet, 7,000 feet, 8,000 feet and9,000 feet to try to determine what the optimal altitude is for each person. Theathletes will then be randomly assigned to live at 6,000 feet, the altitude...

Researchers Identify Gene That Sets Boundaries For Heart Chamber Development

...and the broader process ofchamber specification or chamber formation. We just didn't have a moleculebefore to do that," said Cepko. Irx4 was identified because the researchers were interested in a familyof genes in the fruit fly involved in setting up compartment boundaries inseveral organs. When the...

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