Sentences with phrase «oxidation states»

I think that the cyanobacteria took a very grave risk by ignoring he cautionary warnings of the Interplanetary Panel on Changes in the Oxidation States of Planets.

Cerium is an important oxidation gauge because it can be found in two oxidation states, with one more oxidized than the other.

In this approach all of the functional groups, oxidation states, and stereochemical elements required to get a diverse array of products are preinstalled into building blocks.

The article «Pinpointing Intermediates,» identifies the key geometries and oxidation states in catalysts for NOx cleanup, and shows the connection to enzyme catalysis.

Photosytem II utilizes a water - splitting manganese - calcium enzyme that when energized by sunlight catalyzes a four photon - step cycle of oxidation states (S0 - to - S3).

Iron is not only fascinating chemically, having six more oxidation states than silver, but it has a rich biological chemistry too, forming the core of the oxygen - carrying proteins in blood — myoglobin and haemoglobin — and playing centre field in many enzymatic systems.

He then outlines the various oxidation states of iron — the origin of its wealthy chemistry.

Often oxidation states are hard to tell apart, but in this case nature was kind: V (+2) is purple, V (+3) green, V (+4) blue, and V (+5) yellow.

Vanadium has four oxidation states, known as V (+2), V (+3), V (+4), and V (+5); in each state the element carries a different amount of electric charge.

When two electrolytes, each containing ions with different oxidation states, are allowed to exchange charges, the result is an electric current.

The researchers used a vanadium - based compound because vanadium is a transition metal with various oxidation states, which can be exploited to reach higher capacities.

Materials containing atoms that can switch back and forth between multiple oxidation states are technologically important but very rare in nature, says ORNL's Ho Nyung Lee, who led the international research team that published its findings in Nature Materials.

«However, the ITI was previously limited only to actinides in their maximum or close or maximum oxidation states.

«This makes the uranyl moiety very important, but also the universal view that the ITI was a niche concept of limited applicability dominated because it was restricted to high oxidation state actinide metals like uranium.

Although each has a radically different chemical structure, they all increased the oxidation state of human cells.

Meanwhile, Franklin Tao, Luan Nguyen and Xiaoyan Zhang of the University of Kansas used ambient pressure X-ray photoelectron spectroscopy to characterize the oxidation state of cerium oxide, which was critical to deriving the mechanism.

«Typically, most elements have a stable oxidation state, and they want to stay there,» Lee said.

Redox reactions include all chemical processes in which atoms have their oxidation number (oxidation state) changed.

These charged atoms or molecules are known as ions, and the amount of charge on an ion is known as its oxidation state.

The electrical conductivity of these polymers depends on their oxidation state — that is, the number of positive or negative charges in their polymer chains.

In other homogeneous (or heterogeneous) catalyst systems in which the metal is likely to be in a relatively high oxidation state, such as molybdenum (VI) or tungsten (VI), metal - carbon multiple bonds may play an important role.

For example, the vinyl groups in haem, among other things, help to stabilise the iron (II) oxidation state by acting as a repository for the iron's electrons.

The team realised that the symmetry of the complexes and oxidation state of the uranium ions rendered them ideal systems from which to develop quantitative models.

Researchers found that the volatility and oxidation state of isoprene SOA are sensitive to, and exhibit a nonlinear dependence on, NOx levels.

Complex oxides can exhibit many interesting physical properties including magnetism, ferroelectricity, and superconductivity, and all these properties vary sensitively with the oxidation state of the material.

Instead, the oxidation state of certain elements like manganese or iron may have been more important for life, if it ever existed on Mars,» study coauthor Roger Wiens said.

This led to the development of a methodical process for taking XPS data and determining the oxidation state of uranium.

The data they provide can be used in other studies examining the oxidation state of uranium and other metal compounds.

Whether the radionuclide travels to nearby water sources depends on its oxidation state, the number of electrons around the atom.

The calibrations reveal an atmosphere with an oxidation state closer to present - day conditions.

«By determining the oxidation state of the magmas that created zircon, we could then determine the types of gases that would eventually make their way into the atmosphere,» said Trail.

Not exact matches

Scientists stated that the extract from the hibiscus flower significantly lowered the cholesterol content in the blood serum of lab animals, and successfully prevented oxidation of low - density lipoprotein.

Scientists say that amber is a fossil pine resin from this region that has achieved a stable state through oxidation.

The key was to pick an element that could exist in a variety of electrical, or oxidation, states.

Since August 2012, Thomas Manz, Chemical and Materials Engineering assistant professor at New Mexico State University, and Ph.D. student Bo Yang have worked to develop a new more - efficient selective oxidation catalyst.

«An added requirement for a well - behaved (that is, long - lived) rechargeable battery is that not only must the electrochemical oxidation - reduction reactions be reversible, they must also return the electrode materials to their original physical state.

CoP As an Acid - Stable Electrocatalysts for the Hydrogen - Evolution Reaction: Synchrotron - Based Operando Oxidation - State Determinations F. H. Saadi, A. I. Carim, W. Drisdell, J. Yano, N. S. Lewis, and M. P. Soriaga

We showed that the transition from closed to open state leads to significant decreases in aqueous pH to circumneutral values and significant increases in aqueous hydrogen sulfide and iron concentrations to 10.6 μM and 59.1 μM, respectively, due to sediment AVS oxidation following sediment resuspension.

Similar to D. melanogaster, mINDY - / - mice mimic a state of caloric restriction with increased mitochondrial biogenesis, hepatic lipid oxidation, and insulin sensitivity.

The transition from closed to open state often leads to extensive physical and chemical changes in the estuarine conditions, as water mixing and sediment resuspension are increased, which could result in the oxidation of sediment acid - volatile sulfides (AVS).

This means that it does not follow the redox cycle that most antioxidant do e.g. vitamin C. Redox cycle is a cycle of changing a cell's state by oxidation.

Low - intensity steady - state cardio boosts the body's fatty acid oxidation so that it can take that fat and burn it as fuel.

It accomplishes this by increasing the levels of antioxidant enzyme systems in your body helping the body to achieve an overall lowering and balancing of the oxidation levels, and thereby helping to bring the body back to a state of health.

Cholesterol buildup, oxidation, and inflammation are the three harbingers of Arterial Acne, the leading cause of the death in the United States.

Among these, FGF21 increases insulin sensitivity and causes a corresponding decrease in basal insulin concentrations; FGF21 increases hepatic fatty acid oxidation, ketogenesis and gluconeogenesis; and, FGF21 sensitizes mice to torpor, a hibernation - like state of reduced body temperature and physical activity.

It's true that moderate intensity, steady state exercise uses primarily fat oxidation as fuel, but that isn't the total picture.

Studies shows that exercising in a fasted state increases both lipolysis and fat oxidation rates.

Although consuming BCAAs in a fasted state may only inhibit fasting ketosis short term, even a short - term inhibition of fat oxidation can be enough for you to completely mess up your fast.

(28) http://oregonstate.edu/dept/biochem/hhmi/hhmiclasses/biochem/lectnoteskga/2kjan14lecturenotes.html Fatty Acid Oxidation - Oregon State University dept of biochemistry.

During the fed - state and especially while eating a starch - based - diet, fat - oxidation is inhibited and replaced with carbohydrate - oxidation, insulin is what mediates this shift.