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X Chromosome
A sex chromosome that usually occurs paired in each female cell and single
in each male cell in species in which the male typically has two unlike cell
chromosomes.
Xenobiotics
Industrial chemicals that have a chemical structure not found in natural
compounds that may resist degradation by microorganisms.
XPS(X-Ray Photoelectron Spectroscopy) or ESCA (Electron
Spectroscopy for Chemical Analysis)
A surface-sensitive technique capable of detecting all elements with an
atomic number greater than that of helium. ESCA provides data on the
outermost several atomic layers of a material, and has a sensitivity in the
order of 0.5 atomic percent. A primary advantage of ESCA is that it can both
determine and quantify the chemical state of the elements detected (i.e.
metallic state or oxide state).
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Pharmaceutical Abbreviations
| Abbreviations in product
information leaflets and literature
Acronyms | Glossary
of Terms | Abbreviations
used in the British Pharmaceutical