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Tag: "age" at biology news

Uganda's mountain gorillas increase in number

... increase of one percent over the past decade. The age composition of the population shows a healthy distribution of adult and immature classes, including infants and juveniles. Other findings are that gorillas are not using the eastern side of the park, a possible result of human disturbances there. Par...

Long-term narcotics use for back pain may be ineffective and lead to abuse

...pulations consisted of non-obstetric patients over age 18 with non-malignant chronic back pain lasting for at least three months. The research focused on efficacy of oral, transdermal, or topical opioids, where there was no pre-existing diagnosis of opioid dependence. According to the report, opioids ...

Largest genomic search finds genes that may contribute to autism

...le to screen young children for autism at an early age and begin interventions earlier, which can have a dramatic effect for some children," Dawson said. A second phase of the Autism Genome Project also was announced today to continue the effort to discover the genes that cause the disorder. This $14...

Long-lived deep-sea fishes imperiled by technology, overfishing

...7 or 19 years of age. Scientists can determine the age of fish through their otoliths, or ear bones, which regularly accumulate rings much like trees. Variations in the size of the rings can indicate ocean productivity that year. Harvesting older fish lessens the likelihood of many productive breeding...

New test for most virulent HPV strains under study

...PV test and the type-specific assay to 1,500 women age 30 and older with a negative Pap test and to 1,000 women age 18 and older with cervical cell changes of undetermined significance ?pathologists call this most co...

Like salty food? Chances are you had low blood sodium when you were born

... for the foods that contain it. gestational age and birthweight were not predictors of childhood sodium intake. Conclusions The researchers concluded that low sodium blood serum in infants ?not gestational age, birthweight or neonatal diuretic treatment ?predicts an increased intake o...

Using dental X-rays to detect osteoporosis

...n four clinical centers, 671 women with an average age of 55 years were recruited. To obtain the “gold standard? the team measured bone thickness at the femur, hip, and spine, using the technique that is common for this kind of expensive examination (Bone Mass Density, BMD). In addition, one panoramic an...

Experimental vaccine given during pregnancy reduces stillbirths from common virus

...An effective CMV vaccine for women of childbearing age could greatly reduce the disability caused by the virus," said Duane Alexander, M.D., Director of the NICHD, the NIH institute that funded the study. "A prototype vaccine is the first step in protecting newborns against the most common viral disease...

Pregnancy hormone key to repairing nerve cell damage

...mpared pregnant and virgin female mice of the same age and found that pregnant mice had twice as many myelin-producing cells, called oligodendrocytes, and continued to generate new ones during pregnancy. By chemically destroying myelin around nerve cells, the researchers found that pregnant mice had twic...

Microfossils unravel climate history of tropical Africa

...rican continent. This occurred during the last ice age and, as a consequence, the land climate in tropical Africa was drier than it is in today's world, where it favours the growth of a lush rainforest. These results provide further insight into the natural variation of climate and the possible consequen...

Adding radiation decreases breast cancer recurrence

...h Network. They found that women, regardless of age or comorbidities, who underwent breast conserving surgery but no radiotherapy, were more likely to have recurrence of disease or develop additional breast tumors compared to women who received breast conserving surgery and radiation or mastectomy alo...

Multiple malaria infection inhibits spread of parasite

...he number of gametocytes per person was season and age dependent. Children were found to be by far the most important source of malaria transmission in the area. In the village Koundou, the number of infectious bites was about five times as high as in the capital. There previous research had revealed 177...

'Terror bird' arrived in North America before land bridge, study finds

...of a fossil Titanis bone from Texas determines its age to be 5 million years old. This shows that the bir...ge of fossilization has been used to determine the age of fossils in North America." Geologists have used the technique to study igneous and metamorphic...

Circumcision: A proven strategy to prevent HIV

...6 percent of uncircumcised men are HIV infected by age 25. The majority of the men in the study were Luo, an ethnic group that does not traditionally practice circumcision. Half the men were randomly assigned to circumcision and half the men remained uncircumcised for two years. Participants receiv...

Fish can determine their social rank by observation alone, study finds

... "It's something that kids generally figure out by age 4 or 5--Mary is taller than Fred, Fred is taller than Pete, therefore Mary is taller than Pete. It's been demonstrated in primates, rats and some bird species, but how and why it evolved in animals is a matter of debate." Aggressive bouts In...

Fish growth changes enhanced by climate change

...aracteristics to the growth rings used to date the age of trees. The work was done in collaboration with...The science team examined 555 specimens ranging in age from two to 128 years, with birth years from 1861 to 1993. Growth rates of a coastal species, juv...

Satellites shed light on global warming

...rchers estimate had been stable since the last ice age 12 000 years ago. "This retreat was triggered by climate warming, which caused prolonged summer melt seasons and the formation of extended melt water streams and ponds on the ice shelf surfaces," Rott said. The sections of Larsen-A, which dis...

Cryoablation -- A new treatment option for some kidney tumor patients

...e individuals. If these patients are frail due to age or illness or are not able to have surgery because of other factors, percutaneous cryoablation may be an option. "This procedure appears to be a good option for some patients," says Thomas Atwell, M.D., Mayo Clinic radiologist and the study’s prim...

Scientists identify a candidate gene for osteoporosis

...on, osteoporosis affects 55% of Americans over the age of 50. Low bone mineral density (BMD)—the primary indicator of osteoporosis—is influenced by both genetic and environmental factors (e.g., diet or medication). But the genetic element has been difficult to characterize because bone growth is contro...

Vitamin D deficiency widespread during pregnancy

...inter than in summer for all women of childbearing age in the United States. Even so, the Pittsburgh researchers' study is cause for concern. "This study is among the largest to examine these questions in this at-risk population," Marjorie L. McCullough, Sc.D., senior epidemiologist at the American Ca...

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