Transcaruncular approach for the management of frontoethmoidal mucoceles: a comment.
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Endoscopy↗
Biomedical subjects
P Wormald
Publications and source records attributed to P Wormald.
Interaction of phospholipids with rhodamine 6G in toluene.
Upon interaction of various glycerophospholipids with Rhodamine 6G in toluene, a typical difference spectrum with an absorption maximum at approximately 515 nm is obtained . This spectrum is obtained with phosphatidylcholine only after treatment with NaCl, which presumably weakens intra- and/or inter-molecular electrostatic binding between the negatively charged phosphate moiety and the protonated nitrogen in this molecule. Absorption at 515 nm was linear for all of the phospholipids investigated from a concentration of approximately 1.2 microM up to at least 50 microM. The highest extinction coefficient was obtained for diphosphatidylglycerol (251 mM-1 cm-1) and all of the compounds tested, with the exception of phosphatidylethanolamine, demonstrated extinction coefficients higher than that of palmitic acid. Thus, the absorption spectrum which results from the interaction of purified glycerophospholipids with Rhodamine 6G in organic solvent is a sensitive measure of the amount of phospholipid present.
Coloring Agents↗
Peter Wormald: no ordinary civil servant. Interview by Alison Hyde.
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State Medicine↗
Pulling personnel up by its bootstraps.
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Personnel Management↗