Abstract
Summary
1. Freezing of chemically untreated mucoid-containing salivary secretions results in the formation of a persisting clot when the secretion is thawed. This clot resembles in appearance the mucin clot formed in response to the addition of acid. 2. Evidence from viscosity measurements, response to addition of weak acid, and “sialic acid” analyses indicates that the coagulum formed after freezing and thawing is derived from the salivary mucoid. 3. It is suggested that this effect be taken into account if storage of saliva samples in a frozen state is considered.
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