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Rubber in Biological News

Tires made from trees -- better, cheaper, more fuel efficient

... as a reinforcing filler in the manufacture of rubber tires. A new study suggests that this approach ... for some time as reinforcement in some types of rubber and automotive products, such as belts, hoses and ... the amount of energy needed to compound the rubber composite, improved the heat resistance of the ...

OSU technologies funded for development

... Raman P. Singh and Ranji Vaidyanathan, Recycled rubber Composites for Aerospace, Defense, and ... Engineering. Singh and Vaidyanathan will utilize rubber from discarded tires to create sandwich-core ... like burning fuel for cement kilns and crumb rubber for molded products. The researchers assert this ...

Old growth giants limited by water-pulling ability

... from the leaf surfaces, the water is in "tension," like a pulled rubber band. If an air bubble gets in, it's like the rubber band breaking and water can no longer be transported. With a ...

Eat less or exercise more? Either way leads to more youthful hearts

... the left ventricle is a suction pump," Kovcs explains. "Think of the rubber bulb of an old-fashioned bicycle horn you squeeze it (the analog of the ... cycle), then let go (the analog of the filling or diastolic phase) and the rubber bulb springs back to its original shape, sucking air back in. Similarly, ...

Urban myth disproved: Fingerprints do not improve grip friction

... was behaving like rubber, where the friction is proportional to the contact area between the two surfaces. To check that skin behaves more like rubber than a normal solid, the duo varied the area of each fingerpad that came into contact with the surface by dragging narrow and wide strips of Perspex ...

Nontoxic hull coating resists barnacles, may save ship owners millions

... we need to find their weakness. And this hierarchical wrinkled topography seems to do the trick." Researchers created the coatings by stretching a rubber sheet, applying an ultra-violet ozone treatment to it, and then relieving the tension, causing five generations of "wrinkles" to form concurrently. ...

Non-toxic hull coating resists barnacles, may save ship owners millions

... we need to find their weakness. And this hierarchical wrinkled topography seems to do the trick." Researchers created the coatings by stretching a rubber sheet, applying an ultra-violet ozone treatment to it, and then relieving the tension, causing five generations of "wrinkles" to form concurrently. ...

NAU discovery could help feed millions

... in industrial settings. Of particular interest was a chemical compound known as 4-vinylcyclohexene diepoxide, or VCD, typically used in manufacturing rubber tires, polyesters and plastics. She found that low, nontoxic doses of VCD in mice sped the menopausal process and rendered them infertile. She ...

Cholesterol-busting bug with a taste for waste

... but they have already proved useful as they are able to degrade a wide range of environmental pollutants including phthalates (used in plastics), rubber and hazardous compounds such as the explosive hexogen (cyclotrimethylenetrinitramine). Gordonia cholesterolivorans ' ability to break down ...

Case Western Reserve University engineers hit pay dirt with clay mixture

... friendly polymers, called clay aerogel composites that can take on the shape and size of any container that can hold water from ice cube trays to rubber ducky molds to clam-shell packaging molds that hold and ship electronics. "This is cool stuff," says the associate professor and associate chair of ...

American Chemical Society Weekly PressPac -- April 8, 2009

... journal. In the new study, Herbert Waite and colleagues point out that many existing coatings are severely limited by the materials they cover. A rubber band dipped in molten wax is a good case in point. Once hardened at room temperature, the wax is several times harder and stiffer than the underlying ...

Saving energy and the environment with Flywheels

... fuel consumption and harmful emissions at ports throughout the world. Flynn's design has been incorporated into energy storage systems used in rubber Tired Gantry (RTG) cranes and sold by VYCON Inc. The 8,000 RTG cranes operating at sea ports around the world contribute significantly to port ...

DNA evidence is in, newly discovered species of fish dubbed H. psychedelica

... their sides to jettison themselves forward. With tails curled tightly to one side which surely limits their ability to steer they look like inflated rubber balls bouncing hither and thither. See a QuickTime video of a juvenile hopping along it's also being buffeted by currents at ...

Research yields new clues to how we locate objects in space

... perception component, the researchers created a set of tank lids; the center portion of each lid was indented by a certain amount and covered with a rubber surface. Below the lids were elastic bands, which created a resisting force on the lids. The subjects pushed the transducer into the lid until it ...

Claudin 11 stops the leaks in neuronal myelin sheaths

... myelin sheath a snug fit. The study will be published in the December 1, 2008 issue of the Journal of Cell Biology ( www.jcb.org ). Like the rubber coating on a copper wire, the myelin sheatha membrane extension of glial cells that spirals around the axons of neuronscreates an insulation layer ...

Scripps Research scientists shed light on how DNA is unwound so that its code can be read

... around the nucleosome and make possible translocation of the DNA with respect to the histones, exposing the DNA so that it can be read. "Imagine a rubber band wrapped twice around a water glass. The easiest way to move the band is to pull a little of it away from the glass and then slide it" Asturias ...

Following the leader can be a drag, according to student's research on flapping flags

... -- stretched between two fishing lines and constantly refreshed with a flow of water from the top. Into the membrane, he inserted pieces of thin rubber (the flags) -- attached to perpendicular wire "flagpoles." To measure the forces on the flags as water flowed past them, Ristroph attached small ...

Multiple sclerosis research charges ahead with new mouse model of disease

... the insulator for electrical signaling in the nervous system breaks down and causes severe deficits in brain and nerve function. Much like the rubber insulation on an electrical cord, myelin surrounds long projections from the body of a neuron, and allows signals to travel down the cell with speed ...

State fund advances titanium powder research, 9 other Iowa State projects

... Ellis, an associate professor of civil, construction and environmental engineering. Ellis will work with Envirotech Systems Inc. of Lawton to use rubber particles from scrap tires to develop a process to clean hydrogen sulfide from biogas and other gases. $25,121 to Gary Munkvold, an associate ...

Taking the next step toward advanced artificial limbs

... developed axons are covered with a sheath of myelin, a fatty-like substance that insulates the axons and helps them work efficiently, much like the rubber or plastic coating that insulates electrical wires. Lambert's team will try to achieve predictable neuron growth and axon myelination on various ...

New and revised limits ensure safety in the workplace

... substance, even being produced in the human body, which as a component of many biomolecules in the body is very useful for natural substances such as rubber and for many aromatic compounds in industry, is known to be a carcinogen and is able to modify germ cells. Following a comparison with the so-called ...

International workshop to address capacity building for rainforest leaders

... Convention on Climate Change and agree on consensual points for our action", explains Chairman Manoel Silva da Cunha, the president of the National rubber Tappers Council (CNS). According to Cunha, the environmental services that forest people provide to the planet have taken on an essential role in ...

Why juniper trees can live on less water

... to form in the water-conducting xylem tissues of plants. Water is sucked through xylem tissues under a partial vacuum, "so it's almost like a rubber band being stretched out," explained Jackson. "The dryer the conditions, the greater the tension on that 'rubber band' and the more likely that it ...

First-ever study to link increased mortality specifically to carbon dioxide emissions

... emphysema and asthma, and many published studies have associated increased ozone with higher mortality. [Ozone] is a very corrosive gas, it erodes rubber and statues, Jacobson said. It cracks tires. So you can imagine what it does to your lungs in high enough concentrations. Particles are responsible ...

MIT: 'Micro' livers could aid drug screening

... plates of the miniature liver models, Khetani relies on a technique called soft lithography. This technique fashions a reusable micropatterned rubber stencil from a silicon master. Each stencil contains an array of 24 wells, and each well contains a matrix of 37 tiny holes. Khetani peels and sticks ...

UCSD bioengineering grad student wins leadership award

... of platform chemicals that can be used to make many commercially valuable chemicals and products. Listen to Adam Feist explain how a job at a rubber factory led him to switch from chemical engineering to bioengineering. http://cse-ece-ucsd.blogspot.com/2007/11/why-i-came-to-grad-school.html ...

A tiny pinch from a 'z-ring' helps bacteria cells divide

... single-celled microbes set out to multiply, a signal from an unknown source causes a little-understood structure called a Z-ring to tighten like a rubber band around each bacteriums midsection. The Z-ring pinches the rod-like body into two microbial sausages that finally split apart. To shed light on ...

American Chemical Society's Weekly PressPac -- Sept. 19, 2007

... that speeds up chemical reactions. The enzyme then digests away a layer on the surface, leaving behind an imprint almost like an old-fashioned rubber stamp. Because no diffusion of ink is involved in the process, the resolution of microcontact printed images is about one hundredfold greater than ...

Mirrors in the mind: New studies elucidate how the brain reflects onto itself the actions of others

... used the rubber-hand illusion to show that when a rubber hand is seen being stroked at the same time that ... synchronously stroked, the viewer feels that the rubber hand becomes part of his or her body. In the ... used this illusion--though in this case, the rubber hand was replaced by a real hand of an ...

Researchers make long DNA 'wires' for future medical and electronic devices

... Jingjiao Guan describe how they used a tiny rubber comb to pull DNA strands from drops of water and ... we're doing nanotechnology using only a piece of rubber and a tiny droplet of DNA solution," Guan said. ... technology called soft lithography, where rubber molds press materials into shape. In this ...

Nanotechnology meets biology and DNA finds its groove

... of atoms and molecules. Using techniques typically reserved for the manufacture of computer chips, the Wisconsin team fabricated a mold for making a rubber template with slits narrow enough to confine single strands of elongated DNA. The new technique is akin to threading a microscopic needle with a ...

Researchers show that veins stiffen as we age

... Care Health System in Newark has now confirmed that even our veins stiffen as we age. "When you are young, your veins are nice and elastic--like rubber bands," William Farquhar, a cardiovascular physiologist in UD's College of Health Sciences, said. "But as you grow older, we've found that your veins ...

Nanotech tools yield DNA transcription breakthrough

... unwound DNA during initial transcription. As DNA is unwound, energy is stored in the system, in the same manner, Ebright notes, as winding the rubber band of a rubber-band-powered airplane stores energy. Eventually, there is sufficient energy stored in the system that the machine is able to break ...

Katrina floodwaters not as toxic to humans as previously thought, study says

... were also detected in the floodwaters, Pardue says. The waters contained chemical compounds from aerosol paints, insecticides, caulking compounds, rubber adhesives and other common substances, they say, but at levels that typically do not create concern for human health. If the floodwaters had ...

Researchers learn how blood vessel cells cope with their pressure-packed job

... few of the factors responsible for generating that configuration. rubber bands and most other flexible materials react to stretching by forming ... who contributed to the design of the miniature workout chambers. Silicone rubber membranes inside the chambers were coated with a protein that allowed the ...

New understanding of jet lag

... into synchronization, according to co-investigator Gene D. Block, professor of biology at the University of Virginia. Block likens GABA to a weak rubber band linking pendulums swinging at different rates. If the "rubber band" could be made stronger, such as using a drug to enhance GABA, the ventral ...

Chemical 'band-aid' prevents heart failure in mice with muscular dystrophy

... stretch and a force transducer on the other fiber measures the contractile force of the cell in response to that stretch. "It's like stretching a rubber band," Yasuda says. "You can do specific controlled stretches and record the force generated by the cell. We found that myocytes from normal mice ...

Discovery clarifies role of peptide in biological clock

... the synchronicity was restored, showing that VIP couples pacemaker cells and drives rhythms in slave cells. "VIP between SCN neurons is like a rubber band between the pendulums of two grandfather clocks, helping to synchronize their timing. Some researchers had proposed that knocking out VIP or the ...
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