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Tag: "iron" at biology news

Using nanomagnets to enhance medical imaging

.... Toxicity is not believed to be an issue, because iron is naturally found in the body and other studies have found that these materials are non-toxic at the concentrations used in MRI. NIST works with Florida State University to make single-molecule magnets less than five nanometers (nm) in diameter, ...

Discovery could lead to better control of hemorrhagic fever viruses

...xpertise from Nancy Andrews, MD, PhD, an expert in iron metabolism at Children's, sped up the work. Al...cause of TfR1's essential function in transporting iron into cells, it is found on the surface of virtually every cell of the body. It is abundant on endoth...

Putting an old drug to a new use

We all know that iron deficiencies are dangerous, but also too much iron is bad for our health. Our body stores excess iron in various tissues, where it can lead to organ fa...

New findings blow a decade of assumptions out of the water

...is, then the Pacific and Indian oceans are getting iron from some source other than atmospheric dust, Deutsch says. The new research also means places where nitrogen is being fixed by certain microorganisms are in close proximity to where it is being pulled back apart into its gaseous state by a differ...

Homing pigeons get their bearings from their beaks

...h’s magnetic field. The meaning of these minute iron oxide crystals goes farther than their amazing ability to help pigeons home. Research into how they work has caught the interest of nanotechnologists concerning their potential application for accurate drug targeting and even as a data storage devic...

Researchers create artificial enzyme that mimics the body's internal engine

...ring enzyme: an organic molecule called phenol, an iron atom and a copper atom. Working together, these th...y removed each of the three active centers-phenol, iron and copper-one at a time, as if the enzyme had been damaged and a specific active center was missing...

Trojan horse strategy defeats drug-resistant bacteria

...s own defense mechanisms. "The competition for iron is critical in the struggle between bacteria and h...W. "The body has potent defense mechanisms to keep iron away from infecting organisms, and invaders must steal some if they are to survive." Iron is cri...

Gallium: A new antibacterial agent?

... of Washington, Seattle, is to limit the amount of iron (Fe), which is critical for bacterial growth, to which bacteria have access. In the study, which appears online on March 15 in advance of publication in the April print issue of the Journal of Clinical Investigation, Pradeep Singh and colleagues sho...

Scientists create dual-modality microbeads to improve identification of disease biomarkers

...es embedding fluorescent quantum dots and magnetic iron oxide nanoparticles inside the beads to create dual-modality magneto-optical beads. Nie and Sathe synthesize the quantum dots in different colors by varying their size, giving the beads a unique optical signature. Having different color beads allows ...

Researchers uncover protection mechanism of radiation-resistant bacterium

...ions, pointing to high levels of manganese and low iron levels as possible influences on cellular recovery...tely 300 times more manganese and three times less iron than the most sensitive species. In the new study, which examined the functional consequences of thi...

Moonlighting enzyme linked to neurodegenerative disease

... a deficiency of frataxin, a protein that balances iron in mitochondria, which are the structures that convert nutrients into energy for cells. A new Mayo Clinic study published in the April issue of the Proceedings of the National Academy of Sciences (PNAS) shows that mutations in a moonlighting enzyme, ...

Widely used iron nanoparticles exhibit toxic effects on neuronal cells

...ntial nutrient for mammals and most life forms and iron oxide nanoparticles were generally assumed to be s...oñes began their laboratory experiments by coating iron oxide nanoparticles with DMSA (dimercaptosuccinic acid), a metal binding agent that polymerizes on t...

New UD technology removes viruses from drinking water

...llege of Engineering, incorporates highly reactive iron in the filtering process to deliver a chemical "kn... be the size of a ballpark. "By using elemental iron in the filtration process, we were able to remove viral agents from drinking water at very high effi...

A sweet step toward new cancer therapies

...en exploring the use of metals such as calcium and iron to carry the necessary positive charges. In a series of recently published papers, they first showed that their method can be used to selectively cleave different bonds and then demonstrated that it can be used to identify sulfate-laden proteins and ...

Plant studies reveal how, where seeds store iron

...le discovery for scientists working to improve the iron content of plants. Their research helps address the worldwide problem of iron deficiency and malnutrition in humans. The team found that iron is stored in the developing vascula...

Genetically engineered blood protein can be used to split water into oxygen and hydrogen

...d in their natural state in the blood they have an iron atom at their centre. The scientists modified the porphyrin molecule to swap the iron for a zinc atom in the middle, which completely changed the chemistry and characteristics of the mol...

Plant studies reveal how, where seeds store iron

...le discovery for scientists working to improve the iron content of plants. Their research helps address the worldwide problem of iron deficiency and malnutrition in humans. The team found that iron is stored in the developing vascula...

Underweight women at greater risk of miscarriage

...g most pronounced among those taking folic acid or iron and multivitamins, which contain these. Eating fresh fruit and vegetables daily or on most days was also found to halve the odds of miscarriage and, in a finding that will delight pregnant women everywhere, the consumption of chocolate was also found...

New sunscreen ingredient to heal sunburn and help prevent skin cancer

...t releases an active ingredient which mops up free iron that is released when the skin burns. This reduc...hat goes with sunburn ?which is exacerbated by the iron - and also prevents the build up of harmful sunlight-generated free radicals, which can lead to the ...

Finding an answer to Darwin's Dilemma

...Drs. Canfield and Poulton included measurements of iron speciation and sulphur isotopes to determine the oxygen levels in the world’s oceans at the time these sediments accumulated in Avalon. The close connection between the first appearance of oxygenated conditions in the world’s oceans and the first ...

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