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Tag: "oxide" at biology news

Tiny particles could solve billion-dollar problem

...s: bulk palladium, palladium powder on an aluminum oxide support base, pure palladium nanoparticles and a hybrid nanoparticle developed by Wong that consists of a gold nanoparticle covered with a thin coat of palladium atoms. As metal particles get progressively smaller, a higher percentage of the atoms i...

Imaging Lymph Nodes with Nanoparticles

...oparticles contain a centralsuperparamagnetic iron oxide core and are covered by dextran, impartinglong circulation times and biocompatibility. When injectedintravenously, the nanoparticles localize to lymphoid tissue, and areinternalized into macrophages. There is then a decrease in signalintensity on T2-...

Polymers with copper show promise for implanted sensors

...gy: creating polymer coatings that generate nitric oxide from components already in the blood. U-M chemistr... blood vessels---generate nitric oxide. The nitric oxide produced in this layer of cells diffuses back into the blood vessel walls, where it relaxes surround...

Discovery Promises Simpler Therapy for Sickle Cell Disease

... relax blood vessels through the release of nitric oxide is a major factor behind the disease's primary sym...ts and stroke. Thus, therapies that restore nitric oxide to blood cells might serve as a useful method for treating the disease, said HHMI researcher Jonatha...

Disease diagnosis, biodefense among UH chemical research projects

...roteins found in certain insects that store nitric oxide (NO). Having importance in many areas of human health, NO is useful in lowering blood pressure, treating cancer and increasing oxygen absorption in lung tissue. Czernuszewicz's research is focused on the roles of salivary nitrophorins in storing and ...

Researchers report new pro-inflammatory role for anti-inflammatory enzyme

...sponse to bacterial invasion is to increase nitric oxide levels with an enzyme called inducible nitric oxide synthase. In a study published in the Journal of Biological Chemistry, scientists report that the pr...

NASA study finds snow melt causes large ocean plant blooms

... known as laughing gas. In the atmosphere, nitrous oxide is 310 times more potent as a greenhouse gas than ...ore oxygen from the water, the creation of nitrous oxide in the Arabian Sea could exacerbate climate change, Goes said. ...

Newly Discovered 'Branding' Process Helps Immune System Cells Pick Their Fights

...g out chemically unstable compounds such as nitric oxide and superoxide. Together, these compounds generate peroynitrate, a highly potent chemical that modifies many proteins. Unanue's group showed that this chemical modifies the peptides presented by antigen-presenting cells in several distinct ways. For...

Purdue researchers use enzyme to clip 'DNA wires'

...etic particles, which are made from a ceramic iron oxide material about 4 nanometers in diameter. A nanomet...d in this research has been stretched onto silicon oxide surfaces at lengths up to 35 microns, or millionths of a meter, and 2 nanometers wide," Kinsella sai...

Researchers uncover E. coli's defense mechanism

Iron key to nitric oxide reductionResearchers at the Georgia Institute of T...ber 29, 2005 issue of the journal Nature. "Nitric oxide is produced by the body to fight infections. We discovered a mechanism that allows bacterial cells t...

Physical and functional interaction of key cell growth molecules linked to cancer

...ion leads increased expression of inducible nitric oxide synthase (iNOS). Although elevated iNOS is also a key characteristic of many human malignancies, there has previously been no direct connection made between EGFR and the iNOS/NO pathway. The researchers conclude that the complex formed by EGFR and S...

Stem cells bring fast direct improvement, without differentiation, in acute renal failure

..., and IFN-gamma, as well as iNOS (inducible nitric oxide synthase), and upregulation of anti-inflammatory and organ-protective interleukin-10, as well as bFGF (basic fibroblast growth factor), TGF-alpha (transforming growth factor alpha) and antiapoptotic Bc1-2," the paper added. Beneficial paracrine acti...

Study uncovers dirty little secret: Soil emissions are much-bigger-than-expected component of air pollution

... air pollution than previously believed. Nitrogen oxide emissions total more than 40 million metric tons w...and then extrapolating a global total for nitrogen oxide emissions, the new work used actual observations recorded in 2000 by the Global Ozone Monitoring Exp...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...Nitrogen dioxide (NO2) is associated with nitrogen oxide (NO) in the atmosphere and the sum of the two is called NOX. This is released into the troposphere from power plants, heavy industry and road transport, along with biomass burning, lightning in the atmosphere and microbial activity in the soil. The e...

Magnetic probe successfully tracks implanted cells in cancer patients

...y using MRI to detect magnetic probes of tiny iron oxide particles, an international research team for the ...ally label cells with the clinically approved iron oxide particles. This new application of the probes -- already clinically approved for MRI scanning of t...

Bare metal stents deliver gene therapy to heart vessels with less inflammation in animal studies

... gene that encodes for a protein, inducible nitric oxide synthase (iNOS), in the carotid artery studies, because of iNOS's ability to control cell damage in blood vessels. "However, in further studies, one might use a combination of therapeutic genes or different gene vectors, for even better results," sai...

Phenolic compounds may explain Mediterranean diet benefits

...in oxidative stress and the increase in the nitric oxide bioavailability are behind the observed improvement in ischemic reactive hyperemia," Dr. Pérez Jiménez said. Dr. Pérez Jiménez said that olive oil may be superior to seed oils because it is a natural juice, pressed from the olives, so it does not go...

Alleged 40,000-year-old human footprints in Mexico much, much older than thought

...tation at the moment they cool in the form of iron oxide grains magnetized in a direction parallel to the Earth's magnetic field at the time of cooling. Because the Earth's field has repeatedly flipped throughout the planet's history, it is possible to date rock based on its magnetic polarity. Feinberg fo...

Carnegie Mellon develops non-invasive technique to detect transplant rejection at cellular level

...PIO)- or micrometer (MPIO)-sized paramagnetic iron oxide particles, which are very sensitive to the magnetic fields used during MRI. Wu injected the MPIO or USPIO particles into rats that had received heart transplants three days earlier. Macrophages, which typically ingest foreign materials inside the bod...

Newly identified mechanism helps explain why people of African descent are more vulnerable to TB

... -- combat microbes such as TB by producing nitric oxide in scavenger cells of the immune system known as macrophages. However, this mechanism is not prominent in humans, and the mechanism by which human macrophages kill the tubercle bacillus has remained an additional puzzle. Innate immunity is the rapid...

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