Tag: "exposure" at biology news

JCI table of contents, December 1 2004

... death in the intestine that occurs as a result of exposure to radiation. In the December 1 issue of the Journal of Clinical Investigation, Teresa Tessner and colleagues from the Washington University School of Medicine pursued the mechanism by which PGE2 protects against radiation-induced injury in mice. Th...

New system reduces risk of burns during interventional X-rays

...relative to the patient to determine the radiation exposure at the patient's skin, he explained. "The ...tter throughout the room, providing a way to gauge exposure for the physician and other health-care personnel who may be present. The development effort...

UT Southwestern researchers trace how virus that causes AIDS spreads following oral exposure

...he virus from one person to another. However, oral exposure to the virus through breast milk or semen (during ...n of humans only if they are given within hours of exposure to the virus. Researchers hope the study further identifies one of the major problems facing the fo...

Study: Eat leafy green veggies to help prevent cataracts

...d collard greens, helped to protect the cells from exposure to ultraviolet light a leading cause of cataract ...nd genetic risk factors associated with cataracts, exposure to ultraviolet radiation from sunlight and oxidative stress appear to be the most relevant in this d...

Read your shampoo's label: Study finds common ingredient stunts developing neurons of rats

... 8 at the Washington Convention Center. Prolonged exposure to low levels of methylisothiazolinone (MIT) restr... thus far suggest there is potential that everyday exposure to the chemical could also be harmful to humans. I would be particularly concerned about occupationa...

Multidrug-resitant bacteria found to be airborne in concentrated swine operation

...ng retail pork products is not the only pathway of exposure for the transfer of antibiotic-resistant bacteria ...eding operations are at greatest risk for airborne exposure to antibiotic-resistant bacteria. However, the same workers may also become reservoirs of drug-resis...

Cigarette smoke a culprit in poor healing and increased scarring

...smoke equivalent to "first-hand" and "second-hand" exposure in humans, Martins-Green and her colleagues focused on the structure and function of fibroblasts, both in mice and in human tissue culture. Fibroblasts secrete many proteins that compose a matrix of connective tissue outside of the ...

US researchers warn of possible fertility risk to men using laptop computers on their laps

...We don't know the exact frequency and time of heat exposure capable of producing reversible or irreversible changes in spermatogenesis. Studies have shown significant but reversible changes after short-term heating. However, LC produce significant repetitive transient scrotal hyperthermia for years, and insuf...

Nanotubes glow, even within biological cells

...eased smoothly as the concentration or the time of exposure increased. In addition, some cultures were run at cooler temperatures and showed a slower rate of uptake, a finding that suggested that the nanotubes were being ingested through normal phagocytosis. The samples were studied using a spectrofluo...

Injectable gel could speed repair of torn cartilage

...a knee joint, the material hardens into a gel upon exposure to ultraviolet light, leaving the transplanted cel...ological environment. The material was gelled with exposure to ultraviolet light and cartilage formation was examined over the course of three months. The mater...

Gene therapy reduces skin cancer to sunburn in mouse model

...ours over several days. Five months after the last exposure long after Xpa mutant mice would normally develop skin lesions the treated mice merely had sunburn. The skin cells surrounding the site of the injection in the treated Xpa mutant mice were nearly identical to those of normal animals, indicati...

Doctors link common chemotherapy drug to jawbone necrosis

...th extraction, causing the bone to be exposed. The exposure can eventually lead to infection and fracture and may require long-term antibiotic therapy or surgery to remove the dying bone tissue. The chief of the Division of Oral and Maxillofacial Surgery at LIJ, Salvatore Ruggiero, DMD, MD, and his staff re...

15 million cancer research coup

...als, to design new anti-cancer drugs and advise on exposure limits for workers in various industries. This group provides a focus for attracting further scientists of the highest international repute to Wales."...

JCI table of contents, December 15 2004

... Medical Center in Palo Alto demonstrate that upon exposure of adult cells to fluA, NK cells produce IFN-gamma...d under acidic conditions and found that a 24-hour exposure to acid activates the enzyme Pyk2, which then binds to the proto-oncogene c-Src , causing c-Src a...

Loss of fruit fly retina protein delays blinding light damage

...-standing belief that blindness from chronic light exposure is a direct result of overall retinal degeneration...ns, lose both their retinal cells and vision after exposure to low levels of light for long periods, the relationship between exposure and blindness had been po...

Balancing 'hysteria and suspicion': Doctors face new responsibilities in 'bioterrorism era'

...Unlike other forms of terrorism, in which an acute exposure or traumatic injury is rapidly inflicted and quickly recognized, such as the 9/11 attacks, bioterrorism may involve an incubation period of days or even weeks," says Bruce W. Clements, MPH, associate director of the Institute for Bio-Security at Sain...

Scientist discover the cellular roots of graying hair

...trates deeply into the skin it is often fatal. Sun exposure is a major risk factor in the disease, which has been increasing in the past several decades. Melanocytes, which manufacture and store the pigment that combines with hair-making cells called keratinocytes to color the hair, are specialized cells spaw...

UCSD discovery shows how embryonic stem cells perform 'quality control' inspections

...g normal cellular propagation as well as after the exposure of cells to DNA-damaging radiation and chemicals, it is critical for the embryonic stem cells to develop stringent mechanisms to ensure the repair of DNA damage and prevent the passage of DNA damage to their daughter cells. Unrepaired DNA damage will...

Component of plastic stimulates growth of certain prostate cancer cells

...h prostate cancer cells proved to be vulnerable to exposure to the chemical BPA (bisophenol A), an industrial ...d to this therapy and according to this new study, exposure to BPA among these patients could potentially put them at higher risk for increased cancer cell grow...

JCI table of contents, 3 January 2005

...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...

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(Date:4/17/2014)... If a restaurant ... he can expect his premises to be trashed. Warnings like ... is enough to make restaurant owners pay up. Similarly, mafia-like ... in other birds, nests. If the host birds throw the ... destroying the entire nest. Consequently, it is beneficial for hosts ...
(Date:4/17/2014)... IPCC meeting painted a stark warning on the possible ... a greenhouse effect 32 times that of carbon dioxide. ... humic substances act as fully regenerable electron acceptors which ... in wetlands instead of being released to the atmosphere. ... disrupted it may enter into a vicious cycle to ...
(Date:4/17/2014)... wild animals and plant life, but there,s an invisible ... in the soil, decomposing organic matter and releasing carbon ... fungi play in ecological systems, their identities have only ... generated a genetic map of more than 10,000 species ... this week in the Proceedings of the National ...
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