The ritual of the Red Heifer is one of the most mysterious rituals in the entire Torah. (I have no doubt that this first sentence has been written many times before, but the ritual is so mysterious — ...

WASHINGTON – Tampering is not suspected in an outbreak of E. coli linked to fresh spinach, federal health officials said Monday as they continued to probe the source of the contamination and warned ...

In short, any material that can affect the purity of an API or finished drug product is considered an impurity. Impurities arise from various sources, which commonly include starting material (s), ...

Q: My older home has galvanized plumbing. Plans to upgrade have not yet been realized. Periodically, when running water to get the temperature hot for a shower, a sudden patch of black water comes out ...

Common approaches to analyze elemental impurities for compliance with regulatory requirements are robust but still have some limitations. Elemental impurities present in a drug product are associated ...

Presently ICH M7 and other guidelines give an overview of evaluation and assessment of limits of pharmaceutical impurities categorized as mutagenic. These could be degradation products of ...

Usage: Reference standards serve as quality control benchmarks for equipment calibration and verification of measurement methods and analytical accuracy. Characteristics: Chemicals with established ...

A fusion reactor operates best when the hot plasma inside it consists only of fusion fuel (hydrogen's heavy isotopes, deuterium and tritium), much as a car runs best with a clean engine. But fusion ...

Scientists from Fraunhofer IISB, Wacker Chemie and Alzchem say unwelcome metals enter the silicon primarily through coating of the quartz crucible. The finding could enable manufacturers to make ...