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Tag: "volunteers" at biology news

Innovative smallpox vaccine research study to be conducted at Case Medical Center

...ecruiting and begins here June 15, will follow 215 volunteers nationwide over a two-year period. Volunteers must be in general good health and must not have previously been vaccinated against smallpox. Smallpox is a contagious and sometimes fatal infectious disease characterized by raised bumps that appear o...

Research team identifies new Alzheimer's gene

...igorous criteria to determine whether or not their volunteers had Alzheimer’s. For instance, the study included more than 1000 brain donors confirmed to either have Alzheimer’s disease or be free of the disorder at autopsy. This study resulted in a comprehensive set of high-quality data to be made publicly avai...

Studies to find better ways to preserve human eggs, ovarian tissue under way

...to say. They are collecting ovarian tissue from volunteers age 16 to 37 who need the tissue taken for some reason other than cancer, such as a hysterectomy for benign disease, says Dr. Song, MCG clinical associate professor at MCG and director of research for Augusta-based Xytex Research/Xytex International....

Study finds mix of disease processes at work in brains of most people with dementia

...nd Aging Project—an ongoing study of 1,200 elderly volunteers who have agreed to be evaluated every year and to ...other 12 percent of the cases. Also, 80 of the 141 volunteers who died had sufficient Alzheimer’s disease pathology in their brains to fulfill accepted neuropatho...

Study examines genetic risk factors for Alzheimer's disease

...Medicine has established a bank of more than 3,000 volunteers in South Wales, and elsewhere in the UK, to identify possible genetic risk factors for Alzheimer's Disease. "This is one of the largest studies of its kind and involves many Welsh families " said Professor Julie Williams. “It is by virtue of the...

Individual differences in a clock gene predict decline of performance during sleep deprivation

... may be mediated by its effects on sleep. When the volunteers were allowed to sleep normally, those possessing only the longer form of the gene spent about 50% more of their time in slow-wave sleep, the deepest form of sleep. Slow-wave sleep is a marker of sleep need, and it is known that carrying a sleep debt ...

NIAID DNA vaccine for H5N1 avian influenza enters human trial

...logy," says Dr. Nabel. The study will enroll 45 volunteers between the ages of 18 and 60. Fifteen will receive placebo injections and 30 will receive three injections of the investigational vaccine over 2 months and will be followed for 1 year. Volunteers will not be exposed to influenza virus. The vaccin...

Africa's first large-scale HIV vaccine study launches

...rs in phase I and II trials involving thousands of volunteers in the Americas, Africa and Australia to evaluate ...armless substance) and, to eliminate bias, neither volunteers nor researchers will know who receives the vaccine and who receives the placebo. The trial will last...

Early-stage sperm cells created from human bone marrow

...f Nayernia and his team took bone marrow from male volunteers and isolated the mesenchymal stem cells. These cells have previously been found to grow into other body tissues such as muscle. They cultured these cells in the laboratory and coaxed them into becoming male reproductive cells, which are scientif...

Using brain scans, researchers find evidence for a two-stage model of human perceptual learning

.... In this study, the research team asked human volunteers to undertake a series of tasks presented to them o... be important for object recognition. Then the volunteers were given several hours of training using images of the cars. In these sessions, participants had t...

Flavanols in cocoa may offer benefits to the brain

...e. Hollenberg fed flavanol-rich cocoa to healthy volunteers who were over age 50 and observed a “striking blood flow response?that evolved over several weeks. “Since this cocoa preparation is so well tolerated, it raises hope that the brain blood flow response it stimulates can result in maintenance of healt...

Studies yield insight into the numerical brain

... In their experiments, the researchers asked human volunteers to pay attention to the quantities conveyed by groups of dots or numeric digits presented to them. During the process, the subjects' brains were scanned using functional magnetic resonance imaging (fMRI), in which harmless magnetic fields and radio w...

How does your brain tell time?

... The UCLA team tested the model by asking research volunteers in the study to judge the interval between two auditory tones under a variety of different conditions. The researchers found that volunteers?sense of timing was impaired when the interval was randomly preceded by a "distracter" tone. "Our results ...

Trying to control pain can be a double-edged sword, say scientists

...ate how people cope with pain. In the first stage, volunteers were given an electric stimulus to the backs of their hands and told that they could stop the pain at any point. In the second stage, they were told that the decision to stop the pain was out of their control and could only be stopped by a person or ...

Backache beaten by good vibrations?

...ersity's Centre for Rehabilitation Science need 30 volunteers aged 22-55 who have had sciatica for less than 12 ...t and have not had previous spinal surgery. The volunteers will receive advice on managing their pain and either eight sessions of therapeutic ultrasound (TU) ...

NASA satellite data helps assess the health of Florida's coral reef

...of Florida and The Nature Conservancy. It involved volunteers and researchers from several agencies, organizations and universities, including the University of South Florida. Data from the MODerate-resolution Imaging Spectroradiometer (MODIS) aboard the Terra and Aqua satellites gave accurate, up-to-date inf...

Anticipation plays a powerful role in human memory, brain study finds

...searchers studied the brain activity of 36 healthy volunteers using a technique known as functional magnetic res... images of human tissue. They began by showing the volunteers two kinds of signals. One was neutral, but the other indicated that some type of gruesome picture wa...

How the brain weaves a memory

...apher and colleagues report experiments with human volunteers that shed important light on this process. In their experiments, the researchers presented the subjects with series of "study" words on a display screen, as their brains were scanned using functional magnetic resonance imaging (fMRI). This techniqu...

Early HIV treatment fails to restore memory T cells

...turn as well. By performing intestinal biopsies on volunteers who started HIV treatment shortly after infection, the researchers found that, unlike in blood, intestinal T cells remained low even after several years of HIV treatment in 70% of volunteers, even though only a tiny fraction of these cells were found...

New sunscreen ingredient to heal sunburn and help prevent skin cancer

...es, but expect to be trialling the ingredient with volunteers in the next two to three years. "When skin is exposed to high doses of sunlight, such as when you are sunbathing, a massive amount of free iron is released in skin cells," said Dr Charareh Pourzand from the University of Bath who is working in coll...

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