Tag: "oxide" at biology news

Pollutant causes delayed flowering in plants

...ists have discovered that the air pollutant nitric oxide acts as a plant hormone to delay flowering in plan...hat while plants produce their own internal nitric oxide to regulate flowering, they are also influenced by external concentrations of the chemical. The scie...

Environmental costs of home construction lower with wise choice, reuse of building materials

..., for example, carbon dioxide, methane and nitrous oxide emissions generated during the life cycles of the homes, as well as the length of time these greenhouse gases linger in the atmosphere, to determine the global warming potential of different construction materials. They estimate the global-warming po...

What actually influences air pollution over the Indian Ocean?

...global model simulations, they focused on nitrogen oxide pollution during the periods between the summer an...onsoons - the monsoon transition periods. Nitrogen oxide (NOx = NO + NO2) is an important component of tropospheric chemistry, which catalyzes ozone producti...

UC Riverside researcher takes snapshots of the movement of molecules in a billionth of a second

... the pollutants such as carbon monoxide and nitric oxide can stick to the surface of the catalyst material." A small portion of the catalyst surface can transform the pollutant into benign gasses while the rest of the surface supports these active sites. Understanding how carbon monoxide moves across a...

Related productivity tools complement computed tomography in lung cancer detection

...novel nanometer scale contrast agent for MRI. Iron oxide nanoparticles, which are comparable to the size of a virus, that can help in not only outlining tumors in the brain but also lesions that might have otherwise gone unobserved. The product has the potential to help in image-guided surgeries and improv...

Ancient life form may help create newest technologies

...al, experts say, is to find a better way to create oxide nanocomposite materials that incorporate elements such as germanium, a semiconductor material that has interesting properties that could be of value in optoelectronics, photonics, thin film displays, solar cells and a wide range of electronic devices...

Oxygen sensing in worms may hold key to healthy blood pressure in humans

... which performs signaling interactions with nitric oxide molecules critical to regulating blood pressure. When nitric oxide enters a human cell it activates guanylate cyclase, which catalyzes the formation of cyclic GMP, a p...

Tulane opens doors to discovery

...nner Ignarro will discuss his research into nitric oxide as a signaling molecule in the cardiovascular system. The full, three-day "Doors to Discovery" program requires a registration fee. The first day focuses on future directions in medical research through advances in understanding the human genome a...

Next best thing: wood chip bedding for cattle

...total emissions, the impact of methane and nitrous oxide is actually 21 and 310 times greater, respectively... straw and wood chip bedded cattle manure, nitrous oxide emission accounted for less than 1% of total nitrogen loss while methane emission accounted for less...

JCI table of contents, 15 June 2004

...pdf Death by Nitric Oxide TITLE: Inducible nitric oxide synthase in T cells regulates T cell death and immune memory AUTHOR CONTACTS: Vineeta Bal National Institute of Immunology, New Delhi, India. Phone: +91-11-2-670-3695; Fax: +91-11-2-616-2125; E-mail: vineeta@nii.res.in Jeannine M. Durdik Universit...

Nanoparticles illuminate brain tumors for days under MRI

...brain. The OHSU scientists have shown that an iron oxide nanoparticle as small as a virus can outline not o... of its billionth-of-a-meter proportions, the iron oxide nanoparticle, ferumoxtran-10, can be viewed as a contrast agent under MR for more than 24 hours, som...

Gene at root of urban air pollution's lung effects

...tion results from a chemical reaction with nitrous oxide compounds released in automobile exhaust and industrial emissions, particularly under warm, sunny conditions. Such ozone is toxic in small concentrations and can exacerbate asthma and other respiratory conditions. The researchers exposed mice with an...

Study may improve survival of transplanted livers

...chool of Medicine shows that treatment with nitric oxide after storage may dramatically improve the viabili...he journal Hepatology , showed that use of nitric oxide during reperfusion protected cultured rat liver cells, or hepatocytes, from cell death typically occ...

Andres Vazquez-Torres honored with 2004 Merck Irving S. Sigal Memorial Award

.... Their research detailed the ways in which nitric oxide contributes to resistance to candidiasis and the effects of peroxynitrite on the ability of macrophages kill off Candida. At present, Vazquez-Torres is studying the mechanisms of Salmonella infection and Salmonella's response to defenses mounted...

Vanderbilt doctors use Viagra to treat infants with pulmonary hyptertension

...r that causes smooth muscle to relax. While nitric oxide increases the amount of the chemical produced, Via...small dose of Viagra was begun and then the nitric oxide was slowly weaned away. Hartley's pressures stayed low. That was months ago. Hartley's pulmonary pr...

Study reveals poor Houston air quality

...urban scale ozone hole which is caused by nitrogen oxide emissions from the refineries and petrochemical plants and power plants. Nitrogen oxides eat up ozone at night. "It all means a significant health risk is possible for people in this area unless something is done." Some studies have previously show...

UCR study says second-hand smoke affects healing

...ample, the concentrations of nicotine, tar, nitric oxide and carbon monoxide levels are at least twice as high as those the smoker inhales. Among the findings, they discovered that exposure to smoke altered the arrangement of the cells' cytoskeleton - increasing the cells' adhesive properties and thus red...

Why passive smoking hinders healing

...ample, the concentrations of nicotine, tar, nitric oxide and carbon monoxide levels are at least twice as high. The researchers hope that their work will: "lead eventually to the realization that 'second-hand' smoke exposure can be very damaging."...

Nanotechnology highlights from the ACS national meeting in Anaheim, Calif., March 28-April 1

... at Oklahoma State University have shown that zinc oxide nanoparticles, used in some sunscreens for their ability to absorb harmful ultraviolet light, can also remove arsenic from water. They claim to have found a method to prepare the particles in an ideal form for treatment of drinking water. ( IEC 254 ,...

Marine sponges provide model for nanoscale materials production

...onductor nanocrystals of titanium dioxide, gallium oxide and other semiconductors materials with which nature has never built structures before." Most recently, Morse and his students have made advances in copying the way marine sponges construct skeletal glass needles at the nanoscale. The research group...

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