Tag: "forces" at biology news

Race Plus Roaches: A Breathtaking Link

...e responses, hold a clue. Low socioeconomic status forces families to live in substandard housing, whether urban or suburban, he says. Older homes, or those in crowded areas, give cockroaches a fertile breeding ground. The domestic cockroach has been identified as a source of indoor allergen worldwide, bot...

International Research Team Clones New Skin Cancer Gene

...from the U.S., Australia, and Sweden have combined forces to isolate the gene for basal cell carcinoma of the skin, the most common human cancer. The findings, published in the June 14 issue of the journal Cell, could lead to a skin cream that would cure the disease, and to genetic testing for susceptibili...

Siblicide In Nature: Study Of Galapagos Seabird Finds Death Can Ensure Species Survival

...econd egg hatches in the nest. The older chick forces the younger one out , leaving its tiny sibling prey to certain death from heat or patrolling mockingbirds. The question for Anderson, who first began examining siblicide in 1984 among the boobies that nest on Isla Espanola , the Galapa...

Scientists Identify Gene For Sexual Behavior In Male Flies

...ific conferences," said Wasserman. The labs joined forces at aninternational meeting when he and Baker realized that each of theirgroups had half the essential information needed to clone and understandthe role of the fru gene. "We had a map, and they knew where thecrucial point in the map was," Wasserman...

Moving DNA Molecules With Magnetic Tweezers

...ts to continue studying and refining the tool. The forces that allow Wirtz's device to work are already familiarto any child who has played with a magnet. If you place a sheetof paper over a steel button, then hold the magnet on top of thepaper, you can move the button without touching it. Wirtz'smagnets ar...

A Drug Pump On A Computer Chip

...ng and cooling 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 contraction expels the fluid through an exhaust valve. The flow sensor is made up of a heater that raises the temperature of the flui...

Scientists Use Magnetic Field As Alternative To Space-Based Zero Gravity

...ent wascut. The technique reduced both the body forces and the gravity-induced stresseson the frog embryo...based technique has produced a similar reductionin forces and stresses. "The magnetic field actually picked up every single molecule in the embryos,mimicking...

First-Of-A-Kind Study By University Of Georgia Ecologist Estimates Role Of Natural Forces On Insect Populations

...sts believing the cycles arecontrolled by top-down forces such as predators, parasites anddiseases, while ot...nd the relative importance oftop-down or bottom-up forces in natural systems could be invaluableto scientists, wildlife managers and many others. Hunter used ...

Study: Hydrogen Bonds Aren't Key To DNA Pairing After All

...DNA -- the genetic bedrock of all organisms -- and forces scientists back to the drawing board to revisit the fundamental question of what's really behind the amazing fidelity of DNAreplication. Eric Kool, the University of Rochester professor of chemistry who led the study reported in the September 30...

Good Ergonomics Is Good Economics

...mage, improved stock organization, reduced lifting forces to an acceptable level, reduced the noise level by 20 db; and has, to date, resulted in zero accidents and in a productivity increase with a payback period of only 15 months. Forge shop manipulator. In a forge shop, the old manipulator was replaced ...

Top Scientists Challenge Others: Join Biodiversity Year

... are calling on their colleagues worldwide to join forces in a one- to two-year assessment of the state of biodiversity on Earth. On Friday, Feb. 13, at the annual meeting of the American Association for the Advancement of Science in Philadelphia, the five including two past presidents of AAAS will introd...

At Life's Most Sensitive Stage, Embryos Cope With Stress

...tein woven into the walls ofsome of its cells that forces toxins out. The protein is called an MDRtransporter pump - "MDR" stands for "multi-drug resistance," because theseproteins were first discovered by cancer researchers trying to find out howmalignant tumors manage to eject certain chemotherapy drugs. ...

"Discovering Biological Diversity" Is AAAS Topic For USGS Manager

...re'sliving creatures and the forces that affect them. NBIIdemocratizesenvironmental science in ways that were impossible even in recenttimes." At AAAS, Carroll and Cotter will lead a session that willhelpparticipants dev...

Population Growth Costs Include Global Warming Impact

...icalrelationships that link together the different forces affecting climate changeand greenhouse-gas emissions. "The impacts of climate change are estimated froma number of different studies, but it must be recognized that this is the mostuncertain part of the model," Nordhaus said....

Molecular Mechanochemistry: An Emerging Discipline At The Nexus Of Biology And Physics

...ing howcells sense, respond, and adapt to physical forces and how these responses areimportant to physiological and pathological mechanisms. "This line ofinvestigation is helping us to discover key regulatory molecules important forpreventive therapy in such diseases as atherosclerosis and hypertension," sa...

GCTE/LUCC Open Science Conference:

...derstand global land-use and land-coverchange, the forces that drive it, its relationship to climate andbiogeochemistry, and the links between sustainability and land use. Objectives The objectives of this conference are to present the latest experimental andtheoretical findings on the effects of "global ...

Malthus + 200: Disastrous 'Correction' Looms

...collapse of population are consequences of natural forces beyond human control," Price says. "This view is part of a debate between those who think humans are in charge of their destiny and those who think not. The debate was going on before the time of Malthus and has continued, unresolved, to the presen...

'Mean Gene' Found In Africanized Honey Bees

...n attack. The aggressiveness of Africanized bees forces beekeepers to don protective clothing, which is hot, uncomfortable and cumbersome. Africanized honey bees produce less honey per hive than European breeds. Finally, the Africanized bees are more likely to abscond from the bee keepers when the con...

The First Rejection: Eggs Sequester Bits Of Sperm For Later Elimination

...ntly to reproductive isolation, one of the driving forces behind the origin of species....

High-Pressure Chambers Could Prevent Paralysis After Spinal Cord Injury

...encehere that putting patients under high pressure forces more cell-resuscitatingoxygen into damaged spinal nerves than is possible at normal atmosphericpressure. "It may mean the difference between significant disability and nodisability," James said. James made his remarks at a meeting of ...

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