Tag: "limits" at biology news

Lasers to the aid of embryos

... 4.5 and 20 millionths of a metre. This technique limits the exposure of the embryo to radiation and does not cause any damage to the cell structure or the chromosomes. Another novel feature is that the embryo does not need to be fixed to a holding pipette so the procedure is completed extremely fast. Lase...

NSF-funded researchers discover evidence of microscopic life at the South Pole

... 6, 2000 -- In a finding that may extend the known limits of life on Earth, researchers supported by the Nat... have similar implications for extending the known limits of life....

Binge drinking: a dangerous rite of passage

...ss, learning how to drive a car, and exploring the limits of parental patience and endurance. Adolescence is also a time when most people begin drinking, often drink the most, and for some, experiment with binge drinking. A study in the August issue of Alcoholism: Clinical & Experimental Research (ACER)...

UC Davis research helps state air board set auto-emission rules

The California Air Resources Board, whose limits on vehicle emissions influence air-quality policies around the world, will decide Thursday whether to make any changes in the state's current zero-emission vehicle mandates. The University of California, Davis, has made crucial contributions to the b...

Program shown to help non-alcoholics reduce drinking 66%

...e than 1-3 drinks a day for men. Lower-risk weekly limits are no more than 7 drinks for women and those over 65, and no more than 10 for men. A "drink" is defined as 12 ounces of regular beer, 5 oz. of table wine, 3 oz. of fortified wine, 1.5 oz. of liquor or 12 oz. of wine cooler - serving sizes that are a...

UC Berkeley demographer finds first evidence that maximum age at death in humans is rising

... is real, somehow," he said. "We are changing the limits of the human life span over time." For individuals alive now, the current life span makes it rare to live past 110 years, said Wilmoth. "But future generations could have a higher range." Such statements run counter to recent predictions by other ex...

Hopkins scientists shed light on how the brain 'thinks'

...changed. Experiments show that the theoretical limits are closely observed in people's learning abilities. In other words, humans have a limited number of primitives to deploy when learning skills....

New obesity treatment program to sustain weight loss, UCSF study finds

...lems do not change the limbic brain, a factor that limits their effectiveness. The persistent, comprehensive changes shown in this study suggest that developmental skills training may be a practical, clinical means of altering the limbic brain and of treating depression and other compulsive behaviors, Melli...

Five Rutgers professors named fellows of national science association

... in elucidating dynamical symmetries and parameter limits in the excitation of heavy atomic nuclei." Cizews...tudies the structure of heavy atomic nuclei at the limits of stability, angular momentum and elongation, performing experiments at national and university nuc...

Global warming: lessons taught by snails and crabs

... College) decided to investigate thermal tolerance limits in two groups of common Pacific invertebrates - po...ic already are living at the edge of their thermal limits and might not be able to survive even slight temperature increases. In contrast, subtidal species f...

Hunted deer make up for losses of bucks, UF research shows

... Preserve and most of Eglin Air Force Base are off limits to hunting, whereas it is allowed in Camp Blanding Wildlife Management Area and the Rotenberger Wildlife Management Area. More than 90 percent of the does in all the areas were pregnant, the research found. Males comprised 56 percent of the fetus...

Researchers discover new mechanism of drug that alters genetic makeup of viruses

...urn diminishes the synthesis of viral proteins and limits the replication of viral genomes. For Cameron and his colleagues, the RMP part of the equation was only the beginning. Because ribavirin in its triphosphate state, RTP, accumulates in cells after treatment with ribavirin, the researchers theorized ...

Voyage of the space veggies

...to capture it, just like a dehumidifier. There are limits to the dirtiness of the water plants can process, but increase their tolerance to urea, for example, and they could thrive on the colonists' urine. The researchers are also looking to give plants new attributes to make them grow more efficiently. Di...

Scientists track phosphate to better understand global warming

...ve enough nitrate (another nutrient whose scarcity limits growth) but not enough phosphorus. Crop harvesting can deplete phosphorus from agricultural lands, and old, weathered soils hold onto phosphate tightly, reducing its availability to plants. Most phosphate fertilizer is derived from rock phosphate - a...

In a hopeful sign, mercury levels decline in Everglades wading birds

... in the United States to require mercury-emissions limits on incinerators, he said. Because of the time needed to upgrade industrial facilities, those controls have become prevalent in the last two to three years. "The data are only just now coming in, but the numbers show that we should see another big ...

Researchers craft model that provides reasons for climate-change observations

...e field of study beyond its previous observational limits and providing a way to analyze what contributes to the earlier timing of spring events. A paper published in the 7 January issue of Proceedings of the Royal Society of London, B by a team led by Eric Post, assistant professor of biology at Penn Sta...

Immunoprivilege has its disadvantages

...ceptor knockout mice further demonstrate that IFNg limits medial infection as well as disease severity by affecting somatic as well as hematopoietic cell function. Given reports emphasizing the ability of IFNg to promote vascular pathology in other settings such as arteriosclerosis, this cytokine has recent...

University of Illinois at Chicago expert tinkers with evolution to create human 'Built-to-Last'

..., as the Greek lyric poet Pindar said, exhaust the limits of the possible. Olshansky and his colleagues contributed to the development of a paradigm for understanding mortality known as biodemography. This approach to human aging and longevity, as well as age patterns of death across species draws on the...

UCLA/Pitt researchers transform human fat into bone, muscle, cartilage

...of fetal tissue obsolete. "We don't yet know the limits for stem cells found in fat. So far, we have seen promising results with all of the tissue types we have examined," said Dr. Adam J. Katz, a member of the research team from the Division of Plastic and Reconstructive Surgery at the University of Pitt...

Yale physicists first to create a 'squeezed state' of atoms, which could lead to improved sensitivity ofnavigation systems used on planes and ships

...etaphor that describes a way of working around the limits of the Heisenberg Uncertainty Principle, which places alimit on how accurately the value of two complementary physical quantities can be measured. The Uncertainty Principle states that it isimpossible to know both the exact position and the velocity ...

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