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India ink

An aqueous suspension containing carbon particulates from charcoal powder and paramagnetic oxygen (O2) sensor, that can potentially be used to assess oxygen levels using electron paramagnetic resonance (EPR) oximetry. Upon injection into tissue, the India ink has a particular EPR spectra that is very sensitive to oxygen and on the oxygen levels in tissues, and the line width of the EPR spectrum can be broadened by oxygen. Upon using EPR Oximetry, this spectrum can provide sensitive, repeated, and direct measurements of tissue oxygen and oxygenation status of tumors.
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Synonym:carbon particulate suspension
Carlo Erba India ink
CE India ink
charcoal suspension
paramagnetic charcoal suspension
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