Tag: "age" at biology news
Menstrual Phase Linked To Ineffective Mammograms
...ay partially explain why women under 50 years of age
do not benefit fromscreening mammograms as much as older women." The research involved examining data from the Canadian National BreastScreening Study collected from 8,887 menstruating women who were 40-44 years old whenthey entered the...
Insulin Resistance Is A Risk Factor For Atherosclerosis In Whites And Hispanics
...lling for such factors asdiet, cholesterol levels, age
and other factors, the research showed that amoderate difference in insulin resistance had as large an impact onatherosclerosis in whites and Hispanics as other major risk factors, such ashypertension. However, no such association was present in Afri...
No Link Seen Between Breast Cancer And Pesticides, PCB Exposure For General Population
...ith breast cancer and 192 healthy women of similar age
selected randomly from the general population. Extensive information on diet, reproductive and medical history and other lifestyle information was obtained from all participants through personal interviews. Researchers also drew blood samples...
Common Childhood Virus Poses Threat To Adults, Research Shows
...at a respiratory virus commonin children under the age
of two also afflicts previously healthy adults. T... child inthe United States acquires RSV before the age
of two, as their immune systemsare developing. Adults most vulnerable to infection are those who hav...
Researchers To Investigate Years Before Menopause
...ding to menopause. Smoking is thought to lower the age
of menopause, while the effects of hormones from birth control pills and replacement therapy are unknown. "Much of what we know about women's reproductive cycles came from the first cohort of the Tremin Trust," says Mansfield, a facu...
Early Menarche Puts Young Girls In Peril
... today are likely to be sexually active before the age
at which their great-great grandmothers had even begun to menstruate. She compares the Victorian view on menarche with today's and chronicles the diminishing mother-daughter dialogue, the disappearance of single-sex groupings and intergenerational m...
MGH-Led Team Finds Gene For Crippling Neurologic Disorder
...Early-onset dystonia, usually appearing before the age
of 11, is the most common and severe hereditary fo...nerability to the disease seems to disappear after age
28. "The disease needs a trigger ? perhaps an environmental stress, infection or a change in anothe...
Study Sheds Light On Behavior Of Middle-Age 'Undertaker' Bees
...tic tags, and following them closelythrough middle age
-- provides the first close look at undertakers. Sincebees' nests are built in cavities, such a specialty is important for keepingthe nests clean. "Undertakers had very similar activity levels as other bees,"Trumbo said. "They just do a little bit...
Hunt For Early Heart Attack Genes Begins
...recruit: men who had a first heart attack before age
45 and women, before age55. men who had a first heart attack before age
55 and have a livingsibling who has had a first heart attack before 55 (brothers) or before 65(siste...
Gene For Last Major Form Of Batten Disease Discovered
...h late infantileBatten disease appear normal until age
two or three. Symptoms, which worsenover time, ma... of the disease, and most affected children die by age
fifteen. To be affected with any form of NCL, a child must receive two defective copiesof the gene...
Report Notes Difficulties In Eliminating E. Coli O157:H7 From Food Supply
...he severe consequences of infection that affectall age
groups, its low infectious dose, its unusual acid tolerance, and itsapparent special but inexplicable association with ruminants [cattle, deer, andsheep] that are used for food," wrote Robert L. Buchanan, Ph.D., and Michael P.Doyle, Ph.D., the docume...
Long-Term Vitamin C Use Cuts Cataract Risk In Older Women
...e lens opacities in a group of women whose average age
was slightly over 62-1/2. As a person ages, cataracts in the eye result from an increasing loss of lens transparency. Opacity, or the condition of becoming opaque, comes from changes in the delicate protein fiberswithin the eye lens which gradually d...
Purdue Study Finds Prehistoric Couch Potato
...ncestors, the North American dinosaurs of the same age
had vastly improved their technique," he says. "The South Americans caught up with their northern relatives only in the later Cretaceous, or about 70 million years ago." He will present his findings Saturday (10/11) during the annual meeting of the S...
Oral Vaccine Protects Infants From Severe Rotavirus Diarrhea
...ause oflife-threatening diarrhea in children under age
2 -- reduced severe diarrhealillness by 88 percent...on and data collection. Follow-up continued until age
2. Although the vaccine was only 48 percent efficacious against a first episode ofrotavirus diarrhea...
Cornell Text On International Nutrition
...o curb Cuba's neuropathy epidemic, and in 1965, at age
37, he was awarded the Order of the British Empire by Queen Elizabeth for "distinguished service in Tanzania."...
NIDR Supports Total Genome Studies Of Major Oral Pathogens
...hout treatment, LJP can result intooth loss by the age
of 20. The pathology of Aa is poorly understood. It is known that Aa attaches to andinvades human epithelial cells and produces toxins that can kill or maim humancells. However, little is known about other virulence factors harbored by theorganis...
Overfeeding Normal Infant Rats Affects Three Generations: Permanently Changes Basic Metabolism, Interferes With Reproduction
...he amount offood consumed by the other groups. At age
15 days both groups of stomachtube-fed rats were r...ats were 20 percent heavier than the other rats at age
15days, but then their weight dropped to normal after being returned to theirmothers, Taylor said. ...
Hormonal Changes At Puberty Can Mask High Cholesterol In Blood
...k for heart disease and has acholesterol screen at age
13, a falsely low value will likely result. Thosechildren will definitely have to be screened again after reaching youngadulthood," says Kwiterovich. The Dietary Intervention Study in Children study found that sexual maturationhad the most powerful i...
Gene Locus Found For Essential Tremor Disorder
...ely 1 to 6 percentof the adult population over the age
of 40. "The participation of an American family that has been disabled by tremor forfive generations permitted us to employ a research technique called linkageanalysis to locate the vicinity of an ET gene," says Dr. Higgins. "This findinglays the fo...
Reanalysis Of International Data Finds Sharp Decline In Sperm Density
...dies did not take into account such factors as the age
ofthe subjects, the length of abstinence prior to sample collection, and method ofsample collection, each of which can influence the observed trend. Swan said,"Most of the critics have suggested ways in which the data analysis might beskewed, but no...
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