Tag: "exposure" at biology news
Cincinnati study of Chernobyl residents uncovers new cause of thyroid cancer
...ic mutation event that occurs as a result of their exposure
to high levels of radioiodide. Yuri E. Nukiforov led a team of researchers from both Cincinnati University and the University of Munich in identifying a novel oncogene (a mutated and/or overproduced version of a normal gene that alone or together wit...
New drug may aid battle against nicotine addiction, Alzheimer's and other disorders
..., or the process of addiction following repetitive exposure
to specific drugs. These behaviors all result from the formation of new connections between individual neurons or modifications of existing connections in the brain. "Imaging of nicotine receptors also gives us the potential to study why some people ...
Clam embryo study shows pollutant mixture adversely affects nerve cell development
...cology, is the first step toward understanding how exposure
to BCE might affect human nerve cell development--...y for additional studies that may help explain how exposure
to BCE affects human nerve cell development and how it might relate to neurological disorders. "We c...
COX-2 levels are elevated in smokers
... both of these EGFR ligands occurred quickly after exposure
to tobacco smoke," Dannenberg said. These findings appear to be directly relevant to people because increased levels of both proteins were also detected in oral biopsies from smokers. "These results provide new insights into the mechanism by which to...
Key molecule in plant photo-protection identified
...hing excess solar energy. They found that intense exposure
to light triggers the formation of zeaxanthin molecules which are able to interact with the excited chlorophyll molecules. During this interaction, energy is dissipated via a charge exchange mechanism in which the zeaxanthin gives up an electron to ...
Report assesses health implications of perchlorate ingestion
... with EPA's conclusion and thinks that perchlorate exposure
is unlikely to lead to thyroid tumors in humans. ...nd therefore the way rats responded to perchlorate exposure
is not a good indicator of how humans would react. In the past, high doses of perchlorate were used ...
Chemical used in marine paint may damage hearing in whales
... also is now important to assess the impact of TBT exposure
on marine mammal communication."...
Glow-in-the-dark zebrafish at UH hold keys to biological clocks
...input for the clock to start. In this case it was exposure
to light/dark cycles after the fourth day of development, about the age when the fish start to swim and feed." The researchers used zebrafish (danio rerio) because they yield such a high output of spawn, with hundreds of eggs being laid by each fe...
US government list of cancer-causing agents grows
...human carcinogens" because human studies show that exposure
to these kinds of radiation causes many types of c...e extent on age at the time of exposure. Childhood exposure
is linked to an increased risk for leukemia and thyroid cancer. Exposure during reproductive years i...
JCI table of contents
... a new anti-viral approach Natural or deliberate exposure
to smallpox poses a great health threat, especiall.... The type of immune response mounted following exposure
to a foreign antigen is site-specific TITLE: MyD88-dependent induction of allergic Th2 responses to...
How the brain creates false memories
...as encoding a complex event and afterwards, during exposure
to misleading information. For example, subjects w...reas such as the prefrontal cortex was weak during exposure
to the second sequence of slides compared to during the original viewing. Okada and Stark suggest t...
National Academy of Engineering announces million-dollar challenge to provide safe drinking water
... difficulty working or even walking, and continued exposure
can lead to liver failure, kidney failure, cancer, or the loss of arms or legs. The goal of the Grainger Challenge Prize is to encourage the development of a household- or community-scale water treatment system to remove arsenic from the contaminat...
Stopping smallpox in its tracks: A new anti-viral approach
Natural or deliberate exposure
to smallpox poses a great health threat, especially since routine smallpox vaccinations have been discontinued and no clinically approved treatment currently exists. In the February 1 issue of the Journal of Clinical Investigation , Ellis Reinherz ...
Scientists find male finches frugal in their attempts to attract females
...for seeds and grubs. "They may also increase their exposure
to predators," the biologist said. "This led us to predict that when females are in short supply or infertile, unmated males should reduce these 'costs' by singing less." In a paper published in the new issue of the journal Biology Letters , Sockman...
PET/MRI scans may help unravel mechanisms of prenatal drug damage
...chanisms underlying the harmful effects of cocaine exposure
during pregnancy. The research was funded by the Office of Biological and Environmental Research within the Department of Energy's Office of Science and the National Institute on Drug Abuse. The monkeys were obtained from the Primate Laboratory, dep...
Women's health, tissue regeneration is focus of Illinois & Carle Hospital initiative
...lance of the normal vaginal microflora, as well as exposure
to infections such as HIV and other sexually transmitted diseases. Such knowledge, Wilson said, could allow for improved clinical treatments and provide new methods for physicians to recognize early warning signs of problems for which symptoms may no...
Rats infected as newborns grew up vulnerable to memory problems during an immune challenge
...enged adults may help scientists to understand how exposure
to germs or environmental stressors before or just after birth may foster susceptibility to neuropsychiatric and neurodegenerative diseases. For example, prenatal viral infection has been implicated in schizophrenia, autism and cerebral palsy; bact...
When does a mole become a melanoma?
...ffects of risk factors for human melanoma, such as exposure
to ultraviolet radiation, and how they interact with gene mutations to cause disease. Finally, Zon, who also directs the Children's Hospital Boston Stem Cell Program, will use the fish to learn more about cancer stem cells. Most tumor cells, when tr...
Physicians recommend screening for toxoplasmosis for all pregnant women, newborns
...gondii oocysts that cats pass in their feces, with exposure
occurring through cat litter or soil (examples inc...s, including ingestion of undercooked meats and or exposure
to cat litter. The physicians also found that demographics play no role in the occurrence of infecti...
Removing prions that cause mad cow in humans from blood
...ruary 8, 2005) - - Assessing the risk of potential exposure
to variant Creutzfeldt-Jakob Disease (vCJD), the h...d cow disease. The unknown time interval between exposure
to the infected prion and onset of symptoms exacerbates the challenge of determining the size of a s...
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