Tag: "tee" at biology news

Bone Density Recovers After Teens Stop Injected Contraceptive

Lower bone density appears to recover in adolescent females once they stop using the injected contraceptive depot medroxyprogesterone acetate (DMPA), according to a study funded by the National Institute of Child Health and Human Development of the National Institutes of Health. .. Previous studies had shown that women who use DMPA, marketed under the brand name Depo-Provera, experience a loss of...

'Bionic' arm gives amputee sense of touch

Impressive impact factors prove that BioMed Central's Open Access journals are high quality and widely read and cited. Journals published by BioMed Central have again received impact factors that compare well with equivalent subscription titles, it was announced today, with five titles in the top five of their specialty. The high impact factors for these journals affirm that they are respected by...

Female volunteers prepare for a second 'bedrest'

Twelve women recently completed 60 days of voluntary bedrest in order to simulate the physiological effects of weightlessness on the human body. The research team in Toulouse, France, is now actively seeking twelve new volunteers to enable them to continue and enhance the research. . At the beginning of June, the twelve volunteers from the first phase of the WISE study (Women International Simula...

Neanderthal teeth grew no faster than comparable modern humans'

Recent research suggested that ancient Neanderthals might have had an accelerated childhood compared to that of modern humans but that seems flawed, based on a new assessment by researchers from Ohio State University and the University of Newcastle . . .. And since the rate of tooth growth has become a more-accepted tool for estimating the length of childhood among hominids, the finding is the l...

Volunteers sought for avian flu vaccine study

Vanderbilt University Medical Center is enrolling volunteers in a study to test a new vaccine that targets avian flu, the first such vaccine against the virus. The Vanderbilt trial, led by Kathryn Edwards, M.D., will test the new vaccine in nearly 100 individuals 65 years of age and over. It is the second phase of anational study led by the National Institute of Allergy and Infectious Diseases....

'Nanospheres' that block pain of sensitive teeth

Nanospheres could help dentists fill the tiny holes in our teeth that make them incredibly sensitive, and that cause severe pain for millions of adults and children worldwide. . .. Sensitive teeth or 'dental hypersensitivity' is a condition that arises when the dentine of the tooth is exposed. The dentine is made up of thousands of tiny fluid-filled channels...

Environmental tobacco smoke linked to behavior problems in children and pre-teens

A new Cincinnati Children's Hospital Medical Center study shows that exposure to environmental tobacco smoke, even at extremely low levels, is associated with behavior problems in children and pre-teens. . .. The study will be presented at 8:30 a.m....

Birds that make teeth

Gone does not necessarily mean forgotten, especially in biology. A recent finding by researchers at the University of Wisconsin, Madison, and colleagues from the University of Manchester have found new evidence that the ability to form previously lost organs--in this case, teeth--can be maintained millions of years after the last known ancestor possessed them. . Birds do not have teeth. However,...

Ebola DNA vaccine produces immune responses in all fully vaccinated volunteers in Phase 1 trial

Vical Incorporated announced today that an Ebola vaccine candidate administered using Vical's proprietary DNA delivery technology was safe and well tolerated, and produced both antibody and T-cell Ebola-specific responses in all healthy volunteers who received the full 3 doses of vaccine. . The Phase 1, randomized, placebo-controlled, dose-escalation study, the first human trial for any Ebola vac...

Honeybee decision-making ability rivals any department committee

When 10,000 honeybees fly the coop to hunt for a new home, usually a tree cavity, they have a unique method of deciding which site is right: With great efficiency they narrow down the options and minimize their bad decisions. . .. .. Scientists had known that honeybee scouts "waggle dance" to report...

Intimate kissing quadruples risk of meningitis in teenagers

Intimate kissing with multiple partners almost quadruples a teenager's risk of meningococcal disease, finds a study published online by the BMJ today. . .. .. The research team examined potential risk and protective factors in 15-19 year olds who had been admitted to ho...

Psychotropic drug prescriptions for teens surge 250 percent over 7 year period

Psychotropic drug prescriptions for teenagers skyrocketed 250 percent between 1994 and 2001, rising particularly sharply after 1999, when the federal government allowed direct-to-consumer advertising and looser promotion of off-label use of prescription drugs, according to a new Brandeis University study in the journal Psychiatric Services. . This dramatic increase in adolescent visits to health...

Teens unaware of sexually transmitted diseases until they catch one, Carnegie Mellon study finds

Most sexually active teenage girls know relatively little about sexually transmitted diseases (STDs) until it is too late, according to a paper by Carnegie Mellon University researchers that will be published in the January edition of the Journal of Adolescent Health. . .. The results came from a survey of 300 adolescent girls in the Pittsburgh area....

Tetracycline plus teeth equal gray smile

Many adults over age 35 cover their mouth to avoid smiling in public in order to hide their teeth darkened by tetracycline stains. Typically, invasive as well as costly treatment options, such as veneers, crowns and bonding, served as the only treatment options to help these individuals hide such stains and boost their self-esteem. . However, Kim L. Capehart, DDS, MBA, AGD member and clinician,...

Ultrasound may help regrow teeth

A team of University of Alberta researchers has created technology to regrow teeth--the first time scientists have been able to reform human dental tissue. . .. "It's very exciting because we have shown the results and actually have something you can touch and feel that will...

Tyrannosaur survivorship -- tough times for teens

A massive dinosaur death bed in Alberta has helped map out the animal's life span and thrown doubt on long-held theories about how one species lived, says new research conducted in part at the University of Alberta. . "One of the surprises to me was that the overall pattern of survivorship fits closer to an attritional model rather than the catastrophic model we were expecting," said world-renow...

Steep oxygen decline halted first land colonization by Earth's sea creatures

Vertebrate creatures first began moving from the world's oceans to land about 415 million years ago, then all but disappeared by 360 million years ago. The fossil record contains few examples of animals with backbones for the next 15 million years, and then suddenly vertebrates show up again, this time for good. . The mysterious lull in vertebrate colonization of land is known as Romer's Gap, nam...

On the golf tee or pitcher's mound, brain dooms motion to inconsistency

If you've ever wondered why your golf swings, fastballs or free throws don't quite turn out the same way each time, even after years of practice, there is now an answer: It's mostly in your head. That's the finding of new research published in the Dec. 21 issue of the journal Neuron by electrical engineers at Stanford University. . "The main reason you can't move the same way each and every time,...

Teenager moves video icons just by imagination

Now, a St. Louis-area teenage boy and a computer game have gone hands-off, thanks to a unique experiment conducted by a team of neurosurgeons, neurologists, and engineers at Washington University in St. Louis. . .. Getting subjects to move objects using only their brains has implications toward someday building biomedical devices that can control artificial limbs, for instance, enabling the dis...

How to steer a moving cell

Researchers at the University of California, San Diego (UCSD) School of Medicine have developed new technology which, combined with proteomics ?the large-scale study of the structure and function of proteins and their functions ?has allowed them to map an extensive network of the signaling proteins that control cell movement. . Their work, providing the first comprehensive profile of cell movem...

Human genetic 'deserts' are teeming with significant life

. Most known human genes in the genome map are still incompletely annotated, says Professor Alexandre Reymond, from the Centre for Integrative Genomics, University of Lausanne, Switzerland and the Department of Genetic Medicine, University of Geneva, Geneva, Switzerland. “We found that the vast majority of the protein coding genes we studied utilised often in...