serum - Translation to Spanish, pronunciation, and forum discussions We’re another year older! Join our celebration by receiving a fabulous 8-piece gift, FREE with any $100 order. Value of $134. Code: BDAY19. Serum is a clear, yellowish coloured fluid which is part of the blood. It does not contain white or red blood cells or a clotting factor. It is the blood plasma without the fibrinogens. Serum-free, animal component-free, and chemically defined media and supplements designed to provide easier adaptation, superior cell growth, and enhanced protein productivity. Immunoglobulin light chains that are circulating in serum in a free (unbound) state are called free light chains (FLCs). Measurement of the serum level of FLCs became practical as a clinical blood test in recent decades. Red-top tube or green-top (heparin) tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Sole Serum, the luxury foot lotion that gently melts away pain from heels, flats or sandals. Blend with lavender, peppermint, tea tree oils and 4% lidocaine. Look up serotherapy, serum, or serums in Wiktionary, the free dictionary. Serum may refer to: Serum (blood), plasma from which the clotting proteins have been removed Serum free light chain (SFLC) testing is ordered to help detect, diagnose, and monitor plasma cell disorders (dyscrasias), including multiple myeloma, primary amyloidosis, and related diseases or to monitor the effectiveness of treatment. How is it used? Serum free light chain (SFLC) testing is ordered to help detect, diagnose, and monitor plasma cell disorders (dyscrasias), including multiple myeloma, primary amyloidosis, and related diseases or to monitor the effectiveness of treatment.