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gravity in Biological News

Engineering bouncing babies, 1 at a time

... their obstetricians also look at the role that gravity and other biomechanical processes play in its ... success rate of fertility treatments. The gravity of the Situation "We are all subject to the Earth's gravity forces, and all biological process must also obey ...

March launch planned for ESA's gravity mission

... and use of new technology to map the Earth's gravity field as never before. The satellite has been ... forces of nature. Improved knowledge of the gravity field is one of the most important building ... understanding how the Earth works. Mapping the gravity field with unprecedented accuracy, the GOCE ...

Artificial Gravity receives 2008 Life Science Book Award

... The Springer book Artificial gravity , edited by Gilles Clment and Angie Bukley, has ... 2008 in Glasgow, Scotland. Artificial gravity reviews the principle and rationale for using artificial gravity during space missions, and describes the current ...

AGU journal highlights -- July 23, 2008

... are due to differing treatments of parameterized gravity waves, which have a large influence on the ... shields the Earth from ultraviolet light, and gravity and planetary waves, which influence weather ... high spatial resolution to resolve small-scale gravity waves. To understand the roles of such ...

Astronaut health on moon may depend on good dusting

... how dust deposits in the lungs in reduced gravity in order to assess the health risk of long-term ... could last months. Due to the moons reduced gravity and the size of its dust particles, the ... During the portions of the flight in which gravity is reduced to levels seen on the lunar surface, ...

Quantum weirdness, parallel worlds, dinosaur poop, and the ultimate fate of the universe...

... Penrose was proposing to measure the effect of gravity on a speck of dust. Quantum mechanics says ... would consist of observing the effect of gravity on a tiny mirror the size of a speck of dust, ... that there is enough of this energy to prevent gravity from someday collapsing the universe in upon ...

Simulation reveals how body repairs balance after damage

... on the relationship between the bodys center of gravity and its environment to control balance. They ... on the relation of the subjects center of gravity to the ground. Rather than predicting neural ... The research team is now testing its center of gravity simulation with human subjects and a small robot ...

AGU journal highlights -- Aug. 6, 2009

... and how they relate to wind stress, Ponte and Quinn analyze data from the gravity Recovery and Climate Experiment (GRACE) satellite mission (which measures Earth's gravity field and can sense mass movement) and estimates of winds and currents ...

GOCE's electric ion propulsion engine switched on

... post-launch commissioning phase. The success of GOCE's ultra-sensitive gravity measurements depends on finely controlling the satellite's orbit and ... The DFACS uses, among other inputs, signals from the Electrostatic gravity Gradiometer (EGG) - the primary on board scientific instrument - to ...

Measuring water from space

... comprises two satellites, launched in 2002, which measure how the Earth's gravity field varies with time. The gravity field depends on how mass is distributed on Earth, and affects the speed ...

RV Polarstern on its way to East Siberian Sea

... the equipment on board Polarstern, they will try to retrieve cores with a gravity corer. 50 million years old rocks crop out at these places; usually, only layers of the upper 10 to 15 metres can be cored with a gravity corer, which only shows layers about 1 million years old. Both sediment ...

MIT solves gravity-defying bird beak mystery

... explained exactly how some shorebirds use their long, thin beaks to defy gravity and transport food into their mouths. The phalarope, commonly found in ... Since the birds point their beaks downward during the feeding process, gravity must be overcome to get those droplets from the tip of the bird's long ...

Mars Express -- 5000 orbits and counting

... also been used to measure small changes in the spacecrafts orbit caused by gravity anomalies. Some of the most marked increases in surface gravity have been found over the volcanic Tharsis ridge, indicating a ...

SMOS and Proba-2 launch rescheduled for November

... together on a Rockot launch vehicle from the Plesetsk Cosmodrome in northern Russia. This type of rocket was also used to launch ESA's Earth Explorer gravity Mission GOCE in March this year. The SMOS satellite is currently in the south of France at Thales Alenia Space's premises, where it has been in ...

Unifying the animate and the inanimate designs of nature

... you couldn't predict exactly what animals would look like if you started evolution over on Earth, or it happened on another planet with a given gravity and density of their tissues, the same basic patterns of their design would evolve again," Marden said. In numerous papers over past decade, Bejan ...

2009 ASPB Summer Undergraduate Research Fellowship award announcement

... CATEGORY B Hanwen Bai, Ohio Wesleyan University Mentor: Chris Wolverton The effects of phosphate availability on root architecture and gravity responsiveness in Arabidopsis I'm eager to carry out the work in my proposal and I'm very grateful to ASPB for the opportunity to spend the summer ...

ESA's water mission on track for launch

... the Russian Plesetsk Cosmodrome 800 km north of Moscow. All being well, SMOS will be the second of ESA's Earth Explorer missions to launch after the gravity field and steady-state Ocean Circulation Explorer (GOCE), which is planned for launch on 16 March 2009. Following news from Eurockot Launch ...

January-February GSA Bulletin media highlights

... loading of extensive buried deposits of salts and/or mixtures of salts, ice, and basaltic debris would allow for weak detachments and large-scale gravity spreading. They propose that the generally linear chasmata of Valles Marineris reflect extension, collapse, and excavation along fractures radial to ...

January GEOLOGY media highlights

... volcanic structures allows continents to split apart and new oceans to form. Uplift and magma intrusion at Long Valley caldera from InSAR and gravity measurements Pietro Tizzani et al., CNR-Istituto per il Rilevamento Elettromagnetico dell'Ambiente, Via Diocleziano 324, 80124 Naples, Italy. ...

More food at lower cost

... the number of root hairs is likely to interfere with auxin supply and cause problems with other important traits like a plant's response to gravity and root branching. The new understanding of how to increase the length of roots hairs, rather than their numbers, will now avoid these kinds of ...

The medium is the message: Manipulating salmonella in spaceflight curtails infectiousness

... and molecular machinery of virulence. There, the space shuttle crew grow the bacteria in triple-enclosed containers under conditions of minimized gravity (or microgravity). Nickerson's spaceflight experiments have shown that Salmonella gene expression and virulence are profoundly altered by ...

MIT researchers explain mystery of gravity fingers

... a post-doctoral associate who has previously worked primarily on airflow fluid mechanics problems, had a Eureka! moment when he realized that gravity fingers in soil (or clay or sand) look very similar to water flowing down a window pane, a fairly well-understood phenomenon. He and Juanes then ...

Space researchers developing tool to help disoriented pilots

... The inner ear helps control the sense of orientation. The researchers are putting emphasis on lunar landings due to the challenges of reduced gravity and the unfamiliar, dusty terrain. Data collected from helicopters will play a large role in the research since the rotary-propelled aircrafts' ...

September Geology and GSA Today media highlights

... depth result primarily from variations in the bulk density of oceanic crust. Seismic images of crustal and upper mantle structure are combined with gravity data and lava chemistry to demonstrate that variations in crustal density are caused by magmatic differentiation. This study concludes that the ...

March GEOLOGY and GSA TODAY media highlights

... large subsurface structures that form the hydrocarbon traps for the significant oil discoveries in the area. These subsurface structures also created gravity disequilibria in the overlying tectonic wedge, triggering further gravitational readjustments. Subsequently, as shortening ceased even at depth, ...

AGU journal highlights -- Feb. 26, 2008

... 1. Sodium glow reveals Mercurys comet-like tail Mercurys gravity is too weak to hold a permanent atmosphere. Thus, when atoms are evaporated from the surface by solar photons or other energetic processes, some of ...

Tipping elements in the Earth's climate system

... sea-ice during summer within a few decades. Intermediately sensitive tipping elements, large uncertainty: West Antarctic Ice Sheet - Recent gravity measurements suggest that the ice sheet is losing mass. Since most of the ice sheet is grounded below sea level the intrusion of ocean water could ...

Space technology put into service for global water resources observations

... ESA's ERS and Envisat and NASA-CNES Topex-Poseidon, that provide surface water levels (lakes, reservoirs, rivers, wetlands and floodplains) and space gravity missions, like ESA's GOCE and NASA's GRACE, that provide estimates of the variations of terrestrial water storage (in soils, lakes, reservoirs and ...

Spaceflight shown to alter ability of bacteria to cause disease

... Space flight has been shown to have a profound impact on human physiology as the body adapts to zero gravity environments. Now, a new study led by researchers from the Biodesign Institute at Arizona State University has shown that the tiniest passengers ...

UC's NIH grant brings technology from outer space to playgrounds

... ties the person to a certain location. "We can monitor every location, every individual," says Son. Another major difference besides gravity is the size of the individual, as air particle densities vary with distance from the ground. "There's a distinct particle difference by height," Son ...

Innovative civil engineering application promises cleaner waters

... or residential areas, regardless of the actual construction site needs and conditions. The stormwater is directed to a detention pond where gravity takes over, depositing sediment and some pollutants onto the bottom, says Younos. Pond overflow that still may contain dissolved pollutants reaches ...

Paramecia adapt their swimming to changing gravitational force

... of Brown University have worked out a way to turn gravity on its head and see how the creatures respond. ... Guevorkian were able to increase the effect of gravity by about 50 percent. To increase the effect even ... causes the cell to float more ?and that turns gravity upside down for the cell." Cranking the field ...

U of M study examines kidney stone prevention in astronauts

... space to attempt to combat bone loss, the lack of gravity makes it difficult to achieve enough resistance ... their head lower than their feet to simulate low gravity for 30 days. One twin per pair was randomly ... therapy, exercise in a machine that simulates gravity could reduce the astronaut's risk of developing ...

New biochip helps study living cells, may speed drug development

... flying in parabolas over the Gulf of Mexico, going from two times Earth's gravity to zero gravity again and again," he said. "There is absolutely no way this experiment ...

Physiological effects of reduced gravity on bacteria

... and Laura G. Leff describes differences in bacterial responses to reduced gravity and how for some species, bacteria from the International Space Station ... isolates from corresponding type strains of the same species. Reduced gravity was modeled using clinorotation. The findings suggest that conditions on ...

Simulations unravel outer membrane transport mechanism

... (Click on the link below the image of the system to watch the results of the simulation.) A second simulation exerted a force near the center of gravity of the luminal domain, pulling it out of the barrel in one piece. This required an enormous input of energy, however. “The force that we applied ...

Lessons from the orangutans: Upright walking may have begun in the trees

... our arboreal ancestors to venture onto thin branches. They could have gripped multiple branches with their toes and distributed their center of gravity more effectively, while keeping one or both of their long arms free to reach for fruits and other supports. Orangutans also keep their legs ...

Researchers show that veins stiffen as we age

... to the veins. The veins then transport the blood back to the heart. The veins are equipped with valves to prevent any backflow of blood caused by gravity as blood is returned to the heart from the lower extremities. The walls of the veins are made of collagen and elastin, two proteins that give the ...

MIT engineers probe spiders' polymer art

... they squirt out a thick gel of silk solution. (One teaspoonful can make 10,000 webs.) They then use their hind legs as well as their body weight and gravity to elongate the gel into a fine thread. Kojic, who first practiced on silkworms, learned how to extract a microscopic amount of the gel-like ...
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