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Digitale Medien

Serial MRI of cerebral infarcts before and after removal of an atrial myxoma (1999)

Kawamura, T. ; Muratani, H. ; Inamura, T. ; [weitere]

Springer

Neuroradiology 41 (1999), S. 573-575

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ISSN: 1432-1920

Schlagwort(e): Key words Myxoma ; atrial ; Infarct ; cerebral ; Magnetic resonance imaging

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Notizen: Abstract We describe a cerebral infarct caused by atrial myxoma. A 30-year-old woman with an atrial myxoma presented with a right hemisensory deficit. MRI carried out before and after removal of the myxoma, showed multiple small bilateral white-matter infarcts which increased in number up to the surgery. A lesion in the left thalamus, which enlarged and showed contrast enhancement 4 months before surgery, resembled an old cerebral infarct by the time the myxoma was removed. The number of lesions stopped increasing after surgery. We suggest that atrial myxomas should be removed even in asymptomatic patients, to prevent cerebral infarcts due to embolism of tumour or thrombus.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/s002340050808

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Digitale Medien

Kinetics of enzymatic degradation of cyanide (1992)

Basheer, S. ; Kut, Ö. M. ; Prenosil, J. E. ; [weitere]

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 39 (1992), S. 629-634

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Details

ISSN: 0006-3592

Schlagwort(e): biocatalyst ; cyanide degradation ; immobilized enzyme ; wastewaters ; kinetics ; Chemistry ; Biochemistry and Biotechnology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: CYANIDASE@ is a new enzyme preparation capable of degrading cyanide in industrial wastewaters to ammonia and formate in an apparently one-step reaction, down to very low concentrations. This enzyme has both a high selectivity and affinity toward cyanide. A granular form of the biocatalyst was used in a recirculation fixed bed reactor in order to characterize the new biocatalyst with respect to pH, ionic strength, common ions normally present in wastewaters, mass transfer effects, and temperature. Long term stability was investigated. The kinetics of the enzymatic degradation of cyanide were studied in a batch reactor using the powdered immobilized enzyme preparation and modeled using a simple Michaelis-Menten equation.

Zusätzliches Material: 10 Ill.