Tag: "age" at biology news
Cell Suicide Prevented By Survival Signals
...al Signals October 29, 1998 As most cells age
or become damaged, agenetic program triggers their self-destruction. This "programmed"cell death performs a critical housekeeping function that prevents damaged,malfunctioning or misplaced cells from causing future harm. In some instances, however, ...
Research Suggests New Way To Gauge A Woman's Fertility
...levels in 25 women aged 39 to 52. Women in this age
range are usually considered perimenopausal. Al...y be a better and more direct marker of ovarian age
than FSH, Danforth said. Co-authors for this research included Laura Arbogast, Jamil M...
Hopkins Researchers Find Genetic Colon Cancer Change In Healthy Cells
...te MSIwith cancers that come at a relatively early age
and run in families. Some useMSI to predict a patient's outcome. When the Hopkins researchers examined the colon cancer patients' normalcells, they found that those with abnormal imprinting were "for the most part,the same people with MSI,"...
New Form Of Inherited Dwarfism In Large Pakistani Family Caused By Genetic Mutation In A Pituitary Receptor
...in). Males experiencedlate-onset puberty, at about age
16, and as adults had a distinctive, raspy,high-pitched voice. Biochemical findings in all the participants were consistent with growthhormone deficiency, with abnormal levels of insulin-like growth factors.Subsequent genetic analysis linked...
The Comet That Wiped Out The Dinosaurs May Have Washed Up Boulders Onto Hills In Arkansas
...tterson concludes. He plansto work out the precise age
of the Arkansas boulders in an attempt to confirmhis idea....
A Protein Switch May Turn On Heart Cells To Combat Heart Disease
...hose without the heart Rb gene). At eight weeksof age
the hearts in mice without Rb were 8 percent bigger than the hearts ofmice that still had the Rb gene active in their heart cells. While this represents an important step forward in manipulating cells in theheart to grow, MacLellan says researchers s...
Test For Genetic Trait May Indicate Heart Benefits Of Hormone Replacement
...searchers studied 44 postmenopausal women, average age
58 years. Half of thewomen took estrogen plus progestin and the other half took a placebo. Afterfour months, the researchers reversed the two groups' medications."We wanted to test if the reduction would be greatest in the pattern B women,which we ...
Interferon Less Effective Against Hepatitis C For African Americans
..., Hispanic, and Asian patients who were similar in age
and in their levels of Hepatitis C virus (HCV) as measured by an antibody called HCV RNA. At the end of the interferon therapy, only 5% of African-Americans became HCV RNA negative, as opposed to 33% of Causasians, 28% of Hispanics, and 40% of Asians...
Nut Eaters Have Good Hearts
... over 86,000 (86,016) women aged 34 to 59 years of age
in the USA from 1980 - 90. Over this 10 year period the researchers found that those women who ate nuts more than five times a week were around a third (35 per cent) less likely to suffer from coronary heart disease. Even after taking account of oth...
Discovery Of New Large, Predatory Dinosaur Reported In Science
...ield, Sereno and his colleagues suspected from the age
andcharacteristics of the fossils that the dinosaur belonged to a new genus( Suchomimus ), as well as a new species ( tenerensis ). By analyzing Suchomimus and other spinosaurids, Sereno and his colleagueshave determined that the spinosaurid skull ...
Cutting The Time And Cost Of Developing New Cures: Lord Sainsbury Launches World's First Biomedical Accelerator Mass Spectrometer In York
...hich is based on carbon dating used to measure the age
of ancient finds, will be between one hundred thousand and one million times more sensitive than traditional methods. "For the first time, pharmaceutical and other biomedical research companies all over the world can access a technique which will spe...
Ancient Antarctic Environment Rocked By Volcanic Eruptions
...ists will use the volcanic layers to determine the age
of theirstrata more accurately, because volcanic debris can be dated precisely usingisotopic techniques. Borg said that samples of the pumice fragments are beingsent to be dated at New Mexico Tech, in Socorro, N.M., one of eight U.S.universities taki...
Supernutrients Mean Super Health for Children
...ing neural-tubedefects. All women of child-bearing age
should consume at least 0.4 milligramsof folic acid per day." This year the Food and Drug Administration began requiring that all flourproducts, including pasta and bread, be enriched with folic acid. Some cerealsare also fortified with folic acid....
Duke Study Finds More Genes May Be Affected By Toxic Cadmium
...ans life cycle. Freedman and Liao thus avoided the age
bias that theyinadvertently introduced in a previous set of experiments by exposing entireroundworm colonies for too long a time. They ended up with too many roundworms from the early larval stage oflife because the cadmium was gradually kill...
Discovery Of Mutation May Lead To Help For Male Fertility Problems
...puberty in a mouse -- the cells began dying. Bythe age
of six months, all the sperm-producing cells were dead and the testicleswere one-third normal size. "Since a similar appearance is seen in some infertile men, these micemay provide a model for human sterility," Zinn said. The resear...
Memory Loss In Old Age No Longer Linked To Dying Brain Cells
...ells and anirretrievable loss of memory during old age
no longer amounts to anything morethan folklore. ...ming evidence showing that cognitivedecline in old age
is far less a factor of neuro-degeneration than commonlythought. "It's good news," Gallaghe...
New Findings On Receptor Regulation May Lead To Better Drugs For Diabetes
...ult-onset diabetes, which typically develops after age
40. Halfare unaware they have the disease, which is also a risk factor for heart diseaseand stroke. "The reason this new family of drugs works to control adult-onsetdiabetes is because they bind to the receptor we worked with," says Lazar, wh...
Chinese And US Scientists Identify The World's Oldest Flowering Plant
...ives hope to other investigators to search in this age
sediment for evidence of early flowers" William ...e researchers used radiometric dating to place the age
of Sun's and his plant at between 142 million and 148 million years old. Not that the difference is...
UCSF Study Finds No Association Between Hair Dye And Non-Hodgkin Lymphoma
...identified NHL patients between 21 and 74 years of age
within onemonth of diagnosis with NHL in all of th...m digit dial and matched to NHLpatients by gender, age
within five years, and county of residence, were alsointerviewed about hair color product use. Study...
Oldest Ice Core From The Tropics Recovered, New Ice Age Evidence
... maximum -- the coldest part of the last ice age
--making it the oldest core recovered from the tropics. In a paper in the journal Science, the research teamdescribes a climate in the tropics that was different from what many ...
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