chemical impurity

This is due to the presence of chemical impurities and prolonged exposure to light.

You are cooked at 300 degrees Fahrenheit, to remove chemical impurities.

These techniques also tend to overlook chemical impurities or even co-components.

Obviously, faulty soldering would cause leaks, but the chief problem was with chemical impurities.

Identification of potential and actual chemical impurities: 1.

Using lasers, the technology tries to identify chemical impurities that are characteristic of diamonds from a particular country.

It is free of chemical impurities and is used in various pipe wrapping applications.

The color of fulgurites varies widely, depending on composition and chemical impurities.

Scientists speculate the features might be exposed ice with chemical impurities or a result of outgassing from inside the moon.

The major obstacles are paper's large surface roughness, porosity and chemical impurities, Torbjork says.

The color of a diamond may be affected by chemical impurities and/or structural defects in the crystal lattice.

Even our ordinarily cynical 14-year-old son displayed curiosity as he searched for chemical impurities in water at the Hands-on Science Center.

Diamond type is a method of scientifically classifying diamonds by the level and type of their chemical impurities.

The diamond is a Type IIa diamond, meaning that it does not have any chemical impurities.

The matrix contains a number of chemical impurities, including naturally occurring uranium at concentrations of approximately 100 ppm.

Through research on the human health impacts of bacterial and chemical impurities in water, the development of guidelines for contaminants in drinking water.

In addition to chemical impurities, radiopharmaceuticals may contain radioactive (radionuclidic and radiochemical) impurities.

SCR systems are sensitive to potential chemical impurities in the urea solution, therefore the solvent is demineralized water.

Faggoting stretches chemical impurities within the metal into long thin inclusions, creating a grain within the metal.

Used oil re-refining is the process of restoring used oil to new oil by removing chemical impurities, heavy metals and dirt.

Other problems include moisture in the gas and chemical impurities in the gas (which could lead to localized environmental impacts once the gas is combusted).

Nuclear forensics relies on making these determinations through measurable parameters including, but not limited to chemical impurities, isotopic composition, microscopic appearance, and microstructure.

However, its transformation in natural systems generally is blocked by chemical impurities adsorbed at its surface, for example silica as most of natural ferrihydrites are siliceous.

At some later date, two arcs (constructed from gold of a different origin, as shown by its chemical impurities) were added at opposite edges of the disk.

It is well known that the disinfection of water is the single most important step in the treatment of water besides the removal of physical and chemical impurities.