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Tag: "sometimes" at biology news

Fire ants: Their true story told by the scientist who loves them

...h. Along the way, he offers rare glimpses into the sometimes maddening lab-and-field lives of "myrmecologists" ?scientists who specialize in the study of ants. Why fire ants? "It's a no-brainer," he said. "They are wonderful animals. I love them." Hot off the Harvard University Press in mid-April, "The Fire ...

Patients to benefit from novel technology revolutionizing high-speed molecular imaging

...ry long acquisition times of up to a full hour and sometimes more," he added. "This new camera technology enables acquisition times that are shorter by an order of magnitude (2 minutes vs. today's 20 minutes for a cardiac scan), better image quality (up to two times the image resolution) and the potential for ...

Just like us, social stress prompts hamsters to overeat, gain weight

...the body's CRF receptors, Bartness said. CRF, also sometimes referred to as corticotrophin releasing hormone, produces the body's "fight or flight" response under stress and helps kick off a cascade of physiological responses. "There are a whole suite of physiological responses that occur as a result of stre...

Whiplash injuries ?are they caused by startle reflexes?

... exposed subjects to rear-end collisions that were sometimes accompanied by loud sounds. They showed that a significant component of the muscle reaction in a first collision ?like the unexpected one on the roads ?arises through being startled by the abrupt motion and loud sound of the impact. This new finding ...

Higher levels of obesity associated with greater health risks

...if they weighed 233 lbs). The latter 2 categories, sometimes termed severe obesity, are reported to be increasing especially rapidly in the United States, according to background information in the article. From 1986 to 2000, prevalence of BMI of 30 or higher approximately doubled, while that of BMI of 40 or ...

Einstein researchers take the pulse of a gene in living cells

...he social amoeba Dictyostelium, thousands of which sometimes aggregate into a single slug-like mass. This developmental gene plays a major role in transforming the "slug" into a stalk-like structure called a fruiting body, which releases new amoebae. "The pulsing we observed in this gene would allow it to ver...

Corals switch skeleton material as seawater changes

...eration after generation of tiny coral polyps over sometimes millions of years of coral growth in the same location. The team showed that corals can switch from using aragonite to another mineral, calcite, in making the calcium carbonate. They make that switch in response to decreases in the ratio of magnesium...

Major initiative proposed to address amphibian crisis

...sent, amphibian populations may disappear rapidly, sometimes within six months, the researchers said. Global climate change, the commercial trade of wildlife, and pollution may all increase the movement or susceptibility to this fungus. "There are a lot of concerns, and we should work to address all of them...

Scientists tie several cancers to common 'oncogene engine'

... involvement because clear cell sarcoma tumors are sometimes pigmented ?a process requiring the MITF transcription factor. In this form of sarcoma, Fisher explained, the MITF gene is overactivated by an abnormal joining, or fusion, of two other genes. MITF, in turn, is directly responsible for malignant growth...

Hope I die before I get old?

...ound that ill people are often surprisingly happy, sometimes just as happy as healthy people. This suggests an adaptability or resilience in the face of their medical problems. Ubel is the director of the Center for Behavioral and Decision Sciences in Medicine, an advisor to the RWJ Clinical Scholars Program, ...

Loosen up, DNA: Leukemia gene changes genetic packaging

...he location of the "red-eye reporter gene" around, sometimes inserting it into a "quiet" stretch of DNA, sometimes putting it into an active area, and sometimes inserting it near the border between the two regions. ...

Global warming may have damaged coral reefs forever

...after the 1998 coral bleaching event. "Reefs can sometimes recover after disturbances, but we have shown that after severe bleaching events, collapse in the physical structure of the reef results in profound impacts on other organisms in the ecosystem and greatly impedes the likelihood of recovery. "Unfort...

Wild meerkats school their young

... would retrieve the item and return it to the pup, sometimes further disabling it before returning it to the young meerkat. The researchers, Alex Thornton and Katherine McAuliffe, Department of Zoology, University of Cambridge, are part of the Kalahari Meerkat Project, located at the Kuruman River Reserve, S...

When it comes to gene transcription, random pauses aren’t quite so random, study finds

...e, " named for tiny hairpin-shaped structures that sometimes form when an RNA strand binds to itself. "Kristin... which is interesting. Sometimes it paused longer, sometimes shorter, but the average was remarkably the same--about a second or so. We also discovered that it ...

UGA researchers find that hunting can increase the severity of wildlife disease epidemics

...es and the birth rate increases, compensating ?and sometimes overcompensating ?for the loss. Killing wild animals can also increase the proportion of the population that's susceptible to disease by removing those individuals who have contracted a virus but have developed lifelong immunity as a result of thei...

Basic work on E. coli identifies two new keys to regulation of bacterial gene expression

...t at all," says Gourse. "This is an example of how sometimes less is more, and a probably very ancient example of one of the methods that arose through evolution to regulate gene expression." Ribosomal RNA makes up the bulk of ribosomes, the molecular machines that make proteins and are present in huge number...

Tropical forest CO2 emissions tied to nutrient increases

...nsported around the Earth by global wind patterns, sometimes riding on huge transcontinental dust clouds, said Townsend, who also is associated with CU-Boulder's ecology and evolutionary biology department. "There is strong evidence that humans are increasing the size of these dust clouds as both land-use pat...

New egg freezing technique offers hope to hundreds of women

...d the development of vacuoles (small cavities that sometimes contain water, food or metabolic waste) in their cytoplasm. When TEM was used, more differences became apparent. These included: changes to the linkages between mitochondria (microscopic respiratory structures in the cytoplasm) and intracellular me...

Researchers seek to solve mystery of natural HIV control

...ue ability to control the virus without treatment, sometimes as long as 25 years after infection. "If we could discover how these individuals can coexist with this virus without damage to their immune system and could find a way to replicate that ability in others, we would have a recipe for halting the HIV...

FSU biologists uncover mechanisms that shape cells for better or worse

...olarity and how it develops -- and why it doesn't, sometimes with dire consequences -- in other types of cells and organisms. Results from the FSU study are described in the Aug. 14 online edition of the journal PNAS (Proceedings of the National Academy of Sciences). "We have identified a novel component i...

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