0000000000984963

AUTHOR

Karl-erhard Müller

showing 3 related works from this author

Mass spectrometrical detection of polymer particles in capsule tissue surrounding joint endoprotheses of polyethyleneterephthalate

1982

Pyrolysis mass spectrometry of synthetic high polymers is described. The method is used to detect polymer wear particles in capsule tissue surrounding endoprotheses with polyethyleneterephthalate parts. An approximation of semi-quantitative determination of the polymer wear will be discussed.

chemistry.chemical_classificationMaterials scienceClinical BiochemistryAnalytical chemistryCapsule02 engineering and technologyGeneral MedicinePolymer010402 general chemistry021001 nanoscience & nanotechnologyMass spectrometry01 natural sciences0104 chemical sciencesAnalytical ChemistryPolymer particlechemistryGeneral Materials ScienceComposite material0210 nano-technologyhuman activitiesJoint (geology)Pyrolysis mass spectrometryFresenius' Zeitschrift für analytische Chemie
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Detection of poly(methylmethacrylate) wear particles in capsule tissue surrounding endoprotheses by pyrolysis gas chromatography

1982

Pyrolysis gas chromatography (PGC) is used to detect polymer wear particles in capsule tissue surrounding endoprotheses implanted with poly(methylmethacrylate) as bone cement. The method allows the detection of the polymer incorporated in tissue even in the range of 1 weight%.

chemistry.chemical_classificationChromatographyMaterials science010401 analytical chemistryClinical BiochemistryCapsuleGeneral MedicinePolymer010501 environmental sciencesBone cement01 natural sciencesBiochemistry0104 chemical sciencesAnalytical ChemistrychemistryPoly methylmethacrylateGeneral Materials ScienceGas chromatographyPyrolysis0105 earth and related environmental sciencesFresenius' Zeitschrift f�r Analytische Chemie
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Fluorescence labelling of organic acidic compounds with 4-bromomethyl-7-methoxycoumarin (Br-Mmc)

1977

4-Bromomethyl-7-methoxycoumarin (Br-Mmc) is introduced as a fluorescence marker for aromatic and heterocyclic acids. To investigate the applicability of this method on substances of different chemical classes, screening experiments with 110 compounds were carried out using a microrefluxer. Most aromatic and heterocyclic monocarboxylic acids gave Mmc-esters which are fluorescent on thin-layer plates, like the Mmc-esters of fatty acids, which have been previously investigated. Strong acids, alcohols, amides and most amines did not react, whereas certain cyclic amines such as piperidine gave strongly fluorescent derivatives. Mmc-phenyl ethers shows only weak fluorescence. A new standard proced…

In situChemistrydigestive oral and skin physiologyClinical BiochemistryGeneral Medicine4-bromomethyl-7-methoxycoumarinBiochemistryFluorescenceAnalytical ChemistryCatalysischemistry.chemical_compoundYield (chemistry)LabellingOrganic chemistryGeneral Materials SciencePiperidineHeterocyclic AcidsFresenius' Zeitschrift f�r Analytische Chemie
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