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Tag: "iron" at biology news

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

...orientation 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. Feinb...

Study finds that nutritionally enhanced rice reduces iron deficiency

Breeding rice with higher levels of iron can have an important impact on reducing micronutr...tes, is a major step forward in the battle against iron deficiency, one of the developing world's most debilitating and intractable public health problems a...

Magnetic probe successfully tracks implanted cells in cancer patients

By using MRI to detect magnetic probes of tiny iron oxide particles, an international research team fo...optimally label cells with the clinically approved iron oxide particles. This new application of the probes -- already clinically approved for MRI scannin...

New class of antibiotics effective against drug-resistant bacteria discovered in fungi

...ng the adsorption potential for organic arsenic to iron oxides and clay minerals. Although much of the organic arsenic is biotransformed to inorganic arsenic before it reaches the aquifer, rapid flushing of organic arsenic in to the subsurface during storm events introduces organic arsenic to the subsurf...

Geoscientists follow arsenic from chicken feed to streambeds

...ng the adsorption potential for organic arsenic to iron oxides and clay minerals. Although much of the organic arsenic is biotransformed to inorganic arsenic before it reaches the aquifer, rapid flushing of organic arsenic in to the subsurface during storm events introduces organic arsenic to the subsurf...

Bacteria which sense the Earth's magnetic field

...etosomes are made of tiny crystals of the magnetic iron mineral magnetite (Fe3O4) -- only about 50 nanomet...cells do not only have to take up large amounts of iron from their surroundings and, from it, produce special iron oxide. The crystals also have to have a e...

Scientists characterize proteome of human cornea

...oteins involved in antimicrobial defense, heme and iron transport, tissue protection against UV-radiation and oxidative stress. Several other proteins were known antiangiogenic factors, which prevent the formation of blood vessels. The results from this research may open the door to future therapeutics f...

New imaging technology shown to detect pancreatic inflammation in type 1 diabetes

...enously, these MNPs, which are minute particles of iron oxide, travel through the blood vessels of the body including the pancreas. If pancreatic vessels have become leaky from inflammation, the magnetic particles spill into nearby tissues, where they are "eaten" by scavenger cells called macrophages. Thu...

Researchers Discover That Microbes Can Produce Miniature Electrical Wires

...bility to transfer electrons outside the cell onto iron minerals, which are natural constituents of most soils. However, prior to the discovery of its conductive pili it was unknown how this electron transfer might take place. The conductive pili that Geobacter produces may have a variety of applications...

ORNL, UC Berkeley unravel real-world clues to Earth's mysteries

...cribe a bacterial community that flourishes in the iron sulfide-rich runoff of the Richmond Mine near Redding. A pH level of 7 is considered neutral and most proteins prefer pH levels between 5 and 7. The water trickling from the mine has a pH of about 0.8 and a temperature of 107 degrees Fahrenheit. "Th...

Proteomics brings researchers closer to understanding microbes that produce acid mine drainage

...itrogen from the atmosphere and derive energy from iron that has been leached out of the iron sulfide rock, also known as pyrite or "fool's gold." In the process, they produce sulfuric acid that...

Novel live reporting system to track cells

New findings show an iron storage molecule in the cell can serve as an advan...ease their numbers, thereby causing an increase in iron uptake within the tumor cells. The contrast between the iron content in these and in the normal surr...

Recombinant DNA technology may enable oral, rather than injectable, delivery of protein drugs

...ays. "Humans naturally produce transferrin to move iron through the blood to the liver, spleen and bone marrow. It has been used to carry some protein-based drugs in a piggy-back fashion to their necessary site of action." The next step, Shen explains, was isolating the genetic code for G-CSF, a protein ...

Life detection instrument passes key test on road to Mars

...c soil, which is similar to the rusty red oxidized iron surface of Mars. Skelley and colleagues Pascale Ehrenfreund, professor of astrochemistry at Leiden University in The Netherlands, and JPL scientist Frank Grunthaner visited the desert last year, but were not able to test the complete, integrated anal...

Purdue researchers use enzyme to clip 'DNA wires'

... magnetic particles, which are made from a ceramic iron oxide material about 4 nanometers in diameter. A nanometer is one billionth of a meter, or roughly 10 times the size of a hydrogen atom. The Purdue researchers sliced the DNA wires with an enzyme called BamH1, one of numerous restriction enzymes tha...

Novel gene-silencing nanoparticles shown to inhibit Ewing's sarcoma

... protein called transferrin that normally delivers iron into cells is modified to also smuggle into tumor ...d to transferrin, a protein that typically carries iron molecules through the bloodstream until it meets up with a transferrin receptor on the surface of an...

Iron exporter revealed that may explain common human disorder

...ngle protein is critical in the cellular export of iron may help to explain human hemochromatosis, researc...protein ferroportin is the major, if not the only, iron exporter that functions in key sites of iron absorption and release in the body. The findings sugges...

Surprising findings reported about iron overload

...s and Pacific Islanders have the highest levels of iron in their blood of all racial/ethnic groups who wer...atosis/iron overload absorb an excessive amount of iron from food and supplements ingested. The abnormality affects many people worldwide, is prevalent in t...

Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals

...a form of ferritin, a protein that normally stores iron in a non-toxic form. This metalloprotein acts like a nano-magnet and a potent MRI "reporter." A typical MRI scan detects and analyzes signals given off by hydrogen protons in water molecules after they are exposed to a magnetic field and radiofreque...

A bacterial genome reveals new targets to combat infectious disease

...e synthetic pathway for heme - the oxygen-carrying iron component of hemoglobin. The nematode may require heme for synthesis of developmental hormones, so Wolbachia's heme pathway may be an inviting target for therapy against nematode infection. Since no new antifilarial has been developed in two decades,...

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