Tag: "earliest" at biology news
Dutch men and women exposed to famine in utero have poor lipid profiles
...men who were exposed to famine in utero during the earliest
stages of gestation exhibit an abnormal lipid profile, according to research published in this month's American Journal of Clinical Nutrition. Mothers of the 704 subjects of the study all consumed rations varying from 400 to 880 kilocalories per ...
Ancient running reptile was bipedal, say Science researchers
... by running humans. Eudibamus appears to be the earliest
known tetrapod, or four-legged vertebrate, to adopt this distinctive posture and gait. In its slower moments, the reptile probably moved quadrupedally, according to the Science researchers, including lead author David S. Berman of the Carnegie Muse...
Cloning can turn back the developmental clock
...ne from each parent) develop into females. At the earliest
stages of embryonic development, both X chromosomes are active in female embryos, but just before implantation, one chromosome is chosen for inactivation and silenced. The X-inactivation is random in the embryonic tissue, but in the tissue that ultim...
Ancient South African soils point to early terrestrial life
...nt soil more than 2.6 billion years old may be the earliest
known evidence for terrestrial life, according to a team of Penn State astrobiologists. "Our work shows that the organic matter in this soil very probably represents remnants of microbial mats that developed on the soil surface between 2.6 and 2...
New drug blocks rheumatoid arthritis early on, with few side effects
...s the progress of rheumatoid arthritis (RA) at the earliest
stages of the disease, helping nearly three-quarte...the effect of the two drugs on 632 patients in the earliest
stages of RA. "The major drawback at this point," she adds, "is that etanercept is expensive some $...
PBBs in fire retardant associated with early menstruation in Michigan girls whose mothers were exposed in 1973
... to PBB in the Michigan PBB registry. Those with earliest
menstruation were daughters of mothers with the highest estimated serum levels of PBBs during pregnancy, who had also nursed their infant daughters, giving them both prenatal and breast milk exposures. In the PBB study, the most highly exposed girls ...
Changes in Australian ecosystems tied to arrival of exotic animals
...and colleagues indicated systematic burning by the earliest
human colonizers altered the vegetation patterns e...blished a paper in Science magazine indicating the earliest
humans who peopled Australia some 55,000 years ago inadvertently disrupted the continents food chain...
Genes reveal new clues about the first flower
...re was a great deal of initial diversity among the earliest
ancestors of today's flowering plants."...
Researchers identify genetic risk for Alzheimers disease
...ma could be followed closely to look for the very earliest
signs of Alzheimers, Goate said. Then treatments that come along might save them from further brain damage....
Science's Top 10: genome sequencing named top scientific advance of 2000
...he planet may have been a land of lakes during its earliest
history. Also this year, data collected by the Galileo spacecraft on Europa's internal magnetic field and its cracked and stretched crust strengthened the case for a salty, global ocean lurking beneath the moon's icy shell. Since many researchers bel...
Brain damage in autism: not what scientists once thought
...oal is to tease out genetic risk, and document the earliest
indications of the onset of disorder, and to develop intervention strategies. This sibling study is led by colleague and co-author Rebecca Landa, Ph.D., an expert in child development and autism in the Division of Child and Adolescent Psychiatry at ...
Earlier water on Earth? Oldest rock suggests hospitable young planet
...re. "This appears to be evidence of the earliest
existence of liquid water on our planet," says Mar...anet into space. The new picture of the earliest
Earth is based on a single, tiny grain of zircon from western Australia found and dated by Simon Wil...
Oldest crystal reveals early Earth
...o be 3.8 billion years old. The new picture of the earliest
Earth is based on a single, tiny grain of zircon f...own sample, giving scientists a rare window to the earliest
period of the Earth. "This early age restricts theories for the formation of the moon," Valley says....
ST@T SHEET: A monthly update on science/technology @ Temple University
...esearch Institute in Panama have found some of the earliest
direct evidence of root crop cultivation in the Americas, it was reported in a recent edition of the journal Nature (Oct. 19). The researchers, part of a joint Temple-Smithsonian Tropical Research Institute project in Panama, found starch grains on ...
UCSF-led study points to pivotal, early event in cancer development
..., simultaneous genetic changes associated with the earliest
stages of cancer development. "Until now, we've...played the genomic instability associated with the earliest
steps of cancer. Finally, the researchers determined that the second plateau wasn't senescence at...
Searching for a genetic needle in a genome haystack
...nmental components. According to Crabbe, the earliest
genetic studies on alcohol drinking in rats were published in the late 1940s. More serious and systematic genetic research began in the mid-1970s. By the late 1980s, researchers had clear evidence that genetic influences contributed about half of a...
Genetic therapies for aging will face many challenges
...eeting on Feb. 18. Martin established one of the earliest
Alzheimer's research centers, where he and his research team recently mapped two of the genes responsible for early-onset Alzheimer's disease. He is the author of more than 250 articles and book chapters, has served on the National Advisory Council o...
Antarctic remediation underway
...that materials will be sent to Cape Hallett at the earliest
opportunity to fence off the pools during the penguin-breeding season when the chicks are most likely to become fouled. Additonal steps will be taken to remediate the fuel contamination. Hallett Station was operated jointly by New...
UW astrobiology research gets huge boost from $4.9 million NASA award
...f important areas, from the biogeochemistry of the earliest
life on Earth to the formation, evolution and potential for life on planets outside the Solar System. Ward, a paleontologist, and UW astronomer Donald Brownlee, last year published a pioneering book, "Rare Earth," in which they examined the factors t...
The masculinization of the X chromosome: many genes for early male sperm production reside on the X chromosome
...found that nearly half of all genes related to the earliest
stages of sperm production reside not on the male sex (Y) chromosome as expected, but on the X chromosome, a chromosome universally thought of as the female sex chromosome. The finding, published in the April issue of Nature Genetics, comes as a big...
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