News tagged with impurities
Related topics: electrons
Impurities are substances inside a confined amount of liquid, gas, or solid, which differ from the chemical composition of the material or compound.
Impurities are either naturally occurring or added during synthesis of a chemical or commercial product. During production, impurities may be purposely, accidentally, inevitably, or incidentally added into the substance.
The level of impurities in a material are generally defined in relative terms. Standards have been established by various organizations that attempt to define the permitted levels of various impurities in a manufactured product. Strictly speaking, then, a material's level of purity can only be stated as being more or less pure than some other material.
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Disgust – it's an emotion we experience when we encounter things that are dirty, impure, or otherwise contaminated. From an evolutionary standpoint, experiencing the intense, visceral sense of revulsion that comes with ...
Psychology & Psychiatry Dec 06, 2012 | 5 / 5 (1) | 0 |
Swiss and Canadian health authorities on Wednesday lifted a ban on sales of flu vaccines made by Swiss pharmaceutical giant Novartis after determining they were safe and efficient.
Medications Oct 31, 2012 | not rated yet | 0
Italian, Swiss and Austrian authorities on Wednesday halted the sale of flu vaccines made by Swiss pharmaceutical giant Novartis.
Medications Oct 24, 2012 | not rated yet | 0
As part of its ongoing efforts to help ensure the quality of medicines, the U.S. Pharmacopeial Convention (USP) has announced two new standards related to elemental impurities: General Chapters Elemental ImpuritiesLimits and ...
Medications May 23, 2012 | not rated yet | 0