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Tag: "before" at biology news

Lithium builds gray matter in bipolar brains, UCLA study shows

... she said. "This type of imaging has not been used before to study bipolar patients. We also revealed how commonly used medications affect the bipolar brain." Although other studies have measured increases in the overall volume of the brain, Bearden said, this imaging method allowed the researchers to s...

When your brain talks, your muscles don't always listen

...ing higher firing rate of neurons--is exerted just before you begin the upturn toward one peak and then it eases off again in the downturn toward a valley," Knight noted. Once recordings were completed at one site in the muscle, the electrode was repositioned to sample from other motor units within the m...

Misclassified for centuries, medicinal leeches found to be 3 distinct species

...ations." Since the time of Hippocrates and long before Carolus Linnaeus first described Hirudo medicinalis in 1758, medicinal leeches have been used in a variety of medical treatments--some legitimate, many not. Demand for leeches in 19th-century Europe grew so intense that efforts to protect them led to...

Massive coral death attributed to earthquake

...fs appear to be returning to what they looked like before the earthquake, although the process may take many years. "The challenge now is to work with local communities and government agencies to protect these reefs to ensure the recovery process continues," he says. The team found coral reefs ranging f...

Scientists find hormone activity explains adolescent mood swings

...his anxiety-producing effect of the stress hormone before puberty, because the expression of the receptor is dependent upon hormonal transitions, such as those that occur at puberty. This new finding of a change in the effect of a stress hormone sheds new light on the "mood swings" of puberty....

New study challenges 'critical period' in childhood vision development

...es. The woman lived as a blind child for 12 years before she received treatment. Now, twenty years after her surgery, the researchers found that she is able to discern between separate objects, determine depth, localize faces amongst a background of natural scenes, and match faces by their identity. This...

Research finds music training 'tunes' human auditory system

... six years of musical instrument training starting before the age of 12. The other half had minimal (less than 2 years) or no musical training. All were native English speakers with no knowledge of Mandarin, a tone language. In tone languages, a single word can differ in meaning depending on pitch patte...

A new study of living cells could revolutionize the way we test drugs

...feguard into the system that could be applied long before the drug was tested on animals or even humans. In addition, the electrical activity test could be used to monitor the effects of pollution on naturally occurring micro-organisms in the environment. To detect a cell’s normal activity, Andre Geim a...

Cold sore virus might play role in Alzheimer's disease

...tected in a brain affected by Alzheimer's disease, before any of the hallmark plaques or tangles and certainly long before any behavioral changes are seen. Such inflammation often is a byproduct when the immune system fight...

Cancer-killing invention also harvests stem cells

...ssor King decided to capture stem and cancer cells before the selectins release them. Harvesting Stem C...ing invention is to implant the device in the body before primary tumor surgery or chemotherapy. When doctors remove a primary tumor, the procedure itself ca...

Chemo combination improves survival in asbestos-related cancer

...ich is a nonmalignant condition, and a greater lag before the development of overt malignancy." "There is no way of diagnosing the premalignant phase during the latent period of 15 to 20 years," Green added. "Many of these patients smoke and are in economically disadvantaged communities. Many individual...

In-shell vaccine for chick disease

... virus was able to induce immunity when inoculated before hatching. When hatched chicks were exposed to the virulent M41 strain, we observed protection rates of up to 100 percent. With the UK poultry industry sustaining losses of £23.6M a year to infectious bronchitis virus we hope that our research could h...

New sucker-footed bat discovered in Madagascar

... and discover things in Madagascar that have never before been seen by scientists," Goodman said. "The sense of discovery is almost levitating."...

Trusting your instincts leads you to the right answer

... was switched off at various time intervals either before or after the subjects' eyes landed on the target. ...re that their gazes had shifted to the target just before the image was hidden and their answers weren't guesswork at all. Dr Zhaoping said: "Our eye movem...

Rapid, Low-Cost DNA Testing

...sics labs identify criminals, test ponds and pools before children swim in them, and identify harmful genetic sequences in medical research, to name only a few applications. Rothberg's innovative procedure quickly and inexpensively identifies genetic sequences in any sample of DNA. he technology is a novel...

Antibody therapy prevents type 1 diabetes in mice

... a significant step toward preventing this disease before it can take hold," he explained. ...

First-degree fetal heart block may be reversible

...o. Congenital heart block (CHB) is present at or before birth and impairs the heart's electrical signaling...hers to evaluate an early marker of cardiac injury before there is permanent scarring. The PRIDE group conducted a longitudinal (observational) study follo...

Mailman School of Public Health researchers report blood DNA can be early predictor of liver cancer

...sumably released from the tumor, one to nine years before actual clinical diagnosis. Certain clinical risk factors such as age and hepatitis B and C virus infections, are well documented risk factors for the development of HCC. According to the study findings, these factors coupled with smoking and al...

Vasectomy may put men at risk for type of dementia

...form other complicated tasks for a number of years before other symptoms develop. Some people garden, build cabinets and even navigate a city subway system. By contrast, Alzheimer's patients lose interest in their hobbies, family life and may become idle. As PPA progresses over a number of years, however, ...

How badger culling creates conditions for spread of bovine TB

...ples of blood, sputum, urine and faeces were taken before it was released. They found that TB rates were lowest when there was the least movement of individual badgers between groups. There have been few experimental studies of the incidence of infectious disease in socially-structured wildlife populatio...

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