Sentences with phrase «metal ions»

A blood sample was also taken before and after surgery to monitor the levels of metal ions following the operation.

Other studies have shown that elevated metal ion levels in the body will continue to expose patients to adverse toxic effects, including heart problems and nervous system issues.

These builders help remove positive metal ions such as those of calcium and magnesium, breaking down tough dirt stains and allowing them to be washed away.

In the reaction center of such a «protein knot,» which is known as the «active center,» is often one or more metal ions.

The specific bacterium used in Bren's project was Shewanella oneidensis MR - 1, which consumes toxic heavy metal ions in the wastewater and ejects electrons.

For example, the team found that many of the genetic differences were related to the biochemical function of metal ion binding, and metals are known to influence differences in pigmentation and mandible shape between the two T. cristinae ecotypes.

Scientists from the Institute of Physical and Theoretical Chemistry of the University of Bonn have now developed a molecular «GPS» with which the whereabouts of metal ions in enzymes can be reliably determined.

«Hip implants: Metal wear impairs bone - forming cells» function: Release of metal ions from metal - on - metal pairings.»

When CO2 is pumped into underground porous rocks, it combines with metal ions in the salty water that fills the rock pores and mineralizes into mineral carbonates, such as calcium carbonate (CaCO3).

At the site of infection, this molecule appears to be grabbing onto metals all around it, preventing these metals from reaching toxic levels, but also bringing in controlled amounts of metal ions for nutritional purposes.»

Using metal ions with three or more positive charges, researchers in Tian's laboratory bonded graphene - oxide flakes into a transparent membrane.

Thus, these results directly demonstrate that divalent metal ions participate in general folding of the ribozyme tertiary structure, and further indicate a more specific involvement of Mg (II) in catalysis.

Implant - specific versus fixed regulatory authority cutoff points for blood metal ion levels were tested for their ability to correlate with clinically diagnosed ARMD, rates of which were 12 percent after single - hip BHR replacement, 18 percent after double - hip BHR replacement, and 7 percent after single - hip Corail - Pinnacle replacement.

Through this interdisciplinary effort the team was able to fully characterise the molecules and determine that the ITI operates in these molecules that contain metal ions in only the +4 oxidation state.

«New catalyst for hydrogen production is a step toward clean fuel: Carbon - based nanocomposite with embedded metal ions yields impressive performance as catalyst for electrolysis of water to generate hydrogen.»

Methods used for titania, including metal ion doping, carbon doping, nitrogen doping and hydrogenation usually require stringent conditions to obtain the modified TiO2 such as elevated temperature or high pressure.

«We were able to show that due to its metal oxidizing metabolic activity, when given an access to these Martian regolith simulants, M. sedula actively colonizes them, releases soluble metal ions into the leachate solution and alters their mineral surface leaving behind specific signatures of life, a «fingerprint», so to say,» explains Milojevic.

Local folding transitions display different metal ion dependencies, suggesting that the RNA tertiary structure assembles through a specific folding intermediate before the catalytic core is formed.

Metal ions also stabilize the intersubunit interface.

Carbon - based nanocomposite with embedded metal ions yields impressive performance as catalyst for electrolysis of water to generate hydrogen.

Scientists of Karlsruhe Institute of Technology (KIT) studied the reactions under close - to - reality conditions: With the help of X-rays, they observed the interactions of the nitrogen monoxide pollutant molecule and of the reduction agent ammonia with iron and copper centers, i.e. transition metal ions in Fe - ZSM - 5 and Cu - SSZ - 13, where the reaction takes place.

Mass cytometry, or CyTOF, is a variation of flow cytometry in which antibodies are labeled with heavy metal ion tags rather than fluorochromes.

Producing commercially relevant quantities involves the reduction in solution of positively charged metal ions to neutral atoms in the presence of organic molecules called ligands, which arrest the growth at a particular number of metal atoms.

The retired prison guard contends that debris from the implant's metal parts caused metal ions to enter his bloodstream.

A 2.8 angstrom difference Fourier map reveals two metal ions at the active site, one persistently bound and the other possibly exchangeable during RNA synthesis.

Examining the molecular architecture revealed two metal ions trapped halfway through the membrane, forming a binuclear metal center.

Therefore, colloids that are mostly ionic will have a low particle surface area since most of the metal content is in the form of metal ions not particles.

The chelating substance / medication attaches to toxic metal ions in the body, forming a chemical compound which is excreted from the body via urine, feces, and perspiration.

Professor Liddle added: «The combination of finding the ITI in +4 metal ion complexes, as well as for lanthanide as well as actinide complexes leads to the conclusion that this phenomenon is most likely of far broader reach than previously thought.

The membrane process easily and efficiently separates metal ions, opening the door to revolutionary technologies in the water and mining industries and potential economic growth opportunities in Texas.

In the past few years, chemists have solved that problem at the molecular scale by precisely designing strand fragments, then luring them into mutually overlapping arrangements around metal ions.

Just as our chiral hands can manipulate perfectly symmetrical objects — pens, bats, balls and so on — so the iron - sulphur protein l - rubredoxin, binds achiral metal ions.

DCT1 also changed the so - called inward current of the cells, indicating a better ability to pull metal ions — including other essential minerals such as zinc, manganese, and copper — across the membrane.

Based on these results the researchers were able to explain why DMT1 binds the divalent metal ions iron and manganese (Fe2 + and Mn2 +), but not calcium (Ca2 +)-- in spite of the latter being several orders of magnitude more abundant.

In nature, the microbe thrives on metal ions, converting them to metals like iron that serve as nutrients for other microbes.

Hamers, Haynes and Pedersen tested the effects of NMC on a hardy soil bacterium known for its ability to convert metal ions to nutrients.

Dendrites form when a battery electrode degrades, and metal ions become deposited on the electrode's surface.

MOFs are three - dimensional, coordination networks comprising metal ions and organic molecules and usually are crystalline, porous materials with many applications including storage of gases such as hydrogen and carbon dioxide.

Photochemistry and molecular photovoltaics make frequent use of so - called transition metal complexes which consist of a central metal ion bonded to a group of surrounding ligands.

Combining the two waste products creates a concoction rich in minerals that shackle metal ions within tight molecular bonds, the team reports this month in Environmental Geochemistry and Health.

Transmetalation normally involves a reaction done in organic chemistry in which the substitution of metal ions generates new metal - carbon bonds for use in catalytic systems and to synthesize new metal complexes.

Dissolved metal ions were shown to reach the bone marrow, where they impair mesenchymal stromal cells (MSCs), the progenitors of osteoblasts, a type of cell that is responsible for bone mineralization.

They write,» [B] lood metal ion levels should be only a part of the complete clinical assessment.»

Their findings, which show that metal ions impair the progenitors of bone - forming cells, have been published in the current edition of the journal Biomaterials.

«Here, we verified convincingly that increased redox active metal ions in cancer cells were responsible for this differential sensitivity of cancer versus normal cells to very high doses of vitamin C.»

Most metal ions would flock into that space, which would cause the cathode to lose its structure.