Cell damage caused by brushing may help keep gums healthy
...e found. Bristles wielded with even gentle force tear holes in the epithelial cells that line the gums and tongue, causing a momentary rupture, researchers at the Medical College of Georgia in Augusta report in the cover article of the August issue of the Journal of Dental Research. Tearing enables ca...Study points to new way to predict death risk from torn aorta
...ch. -- Each year, 10,000 Americans suffer a sudden tear in the lining of their bodys largest blood vessel,...ated immediately. Actor John Ritter died of such a tear in 2003. Better medical imaging and treatments such as medication, surgery and catheter-based pro...Effects of aging in stem cells
...rt to the notion that HSCs succumb to the wear and tear of aging, just like other cells, and shed light on the mechanisms of aging. To study HSCs regenerative capacity over time, Chambers et al. isolated HSCs from young (aged 2 months) and old (aged 21 months) mice and then transplanted either young or...Accident-prone? Scientists link brain function to knee injuries
...rtling into an embankment on an icy ski course can tear this major knee ligament, most athletes actually do themselves in--they don't collide with a person or object, they end up injuring themselves when they land off-balance during a jump or run. But why? In a first-ever study of its kind, University...JCI Table of Contents -- July 2, 2007
...nction, its remarkable that muscle cells just dont tear apart. In fact, cell membrane rupture occurs frequently under normal conditions but to prevent cell death cells have developed mechanisms to reseal ruptured membranes. In this issue of the JCI, Campbell et al. observed that membrane repair is impaire...Study suggests other causes for childhood brain aneurysms
...atigue of the arterial wallresulting from wear and tear caused by a lifetime of excessive blood pressure and flow on thin-walled cerebral arteries. But our study suggests thatunlike the adult diseasechildhood aneurysms may be driven by unique predisposing factors that we have not yet identified. It cou...Humans aren't the only ones with obesity problems
...ht in obese horses forces the connective tissue to tear and the bone breaks through the nail-like texture of the hooves. Veterinarians have yet to find an effective treatment for the condition. In the worst cases of laminitis, veterinarians are forced to euthanize the horse. Horses that develop insulin re...The last wild hunt -- Deep-sea fisheries scrape bottom of the sea
... with chains, to take out the corals so they don't tear the nets. Then they go back and scoop up the fish," says Murray Roberts of the Scottish Association for Marine Science. Some living corals may date back 1800 years and reefs may be older than the Egyptian pyramids. Scientists are losing climate recor...Tears reveal some of their deepest secrets to researchers
... tears. What we think of as tears, scientists call tear film, which is made up of three distinct, microsco...niversity. "The lack of certain compounds in the tear film may result in a number of different eye-related disorders, including dry eye," she said. "The a...Cartilage discovery offers arthritis hope
...illion people in the UK, is caused by the wear and tear of the smooth, hard cartilage tissue that covers the ends of bones allowing them to glide over one another at the joint. Scientists have long known that cartilage gets its strength from interlocking millimetre-long collagen fibres that work in a sim...For crickets, parasitic flies can stop the music
...heir amorous hosts, grow for about a week and then tear their way out in "Alien" fashion, killing the cricket as they emerge. Now, University of Florida zoologists have found that the danger posed by the flies has apparently affected when crickets sing. In experiments with Southeastern U.S. field cricke...Pittsburgh-based team engineers muscle, bone cell differentiation with aid of ink-jet printer
...s like Duchenne Muscular Dystrophy (DMD), wear and tear associated with aging joints, accidental trauma, and joint deterioration due to autoimmune disorders. The custom-built ink-jet printer, developed at Carnegie Mellon's Robotics Institute, can deposit and immobilize growth factors in virtually any de...Developing uses for sugar-cane bagasse: Biotechnology applied to the paper industry
...s mechanical characteristics (tensile strength and tear resistance) without appreciable loss of material. The results as a whole emphasize the potential for applications of this bioprocess in the paper industry. Retrieval of the laccase at the end of the cycle, after washing and pressing of the bagasse,...Drug-induced labor increases risk of rare but serious delivery complication
...amniotic-fluid embolism arises when a simultaneous tear occurs in the fetal sac and in the vessels surrounding the uterus, allowing amniotic fluid to escape into the mother's circulatory system. Though this complication is rare it can be serious and even fatal; amniotic-fluid embolism is one of the leadin...Fast-freeze snapshot yields new picture of nerve-muscle junction
... While slow freezing can create ice crystals that tear cell structures apart, the high-pressure technique, using liquid nitrogen to flash-freeze at minus-180 degrees Celsius, makes ice appear like liquid glass and devoid of destructive crystals. Cross-sections taken of synapses reveal that membrane pack...New method for dating art prints and early books borrows know-how from genetic science
... of the wood and copper alone, not by the wear and tear of the printing process itself or the number of times an impression was made with a particular block or plate. "Aging of the wood creates breaks in the relief of a carved woodblock, causing line breaks on the resulting print" Hedges discovered. "For ...Getting ACL tears to heal themselves
...ge girls who are five times likelier than boys to tear the ligament they typically occur during sports that involve jumping and pivoting, like soccer or basketball. ACLs are currently reconstructed by replacing the torn ligament with a tendon graft. This painful operation allows patients to return to sp...Wasabi's kick linked to single pain receptor
...accounts for the toxic and inflammatory actions of tear gas, vehicle exhaust, tobacco smoke, and the byproducts of some chemotherapy drugs widely used in the treatment of cancer, severe arthritis, multiple sclerosis, and lupus. The insights therefore suggest potential new avenues for the development of an...Study in Royal Society journal on first observation of giant squid in the wild
...emoving parasites from fish as cleaners do, mimics tear flesh and scales from unsuspecting victims. The authors discovered that fangblenny mimics were more successful in attacking victims on reefs where they were much rarer than cleanerfish. Rarity probably favours mimics because potential victims encou......as, is pumped into the chamber and the radio waves tear apart the hydrocarbon molecules and strip off the electrons from its carbon atoms to produce positive carbon ions. These are attracted to the negatively charged component to produce the coating. Franks said: "The advantage of this method is that the ...