Markus Naegele

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We present photoacoustic (PA) spectroscopy measurements of carbon dioxide, methanol, and ammonia. The light source for the excitation was a single-mode quantum cascade distributed-feedback laser, which was operated in pulsed mode at moderate duty cycle and slightly below room temperature. Temperature tuning resulted in a typical wavelength range of(More)
Monopolar electrocautery devices are being used in operating theaters worldwide and have become a "sine qua non" in modern surgery. Despite being widespread, the use of electrocautery is not harmless, because by burning the tissue with rather low temperatures as compared with usual combustion, toxic gases evolve and particles are dispersed and are inhaled(More)
The response of ion-selective membrane electrodes is usually still described with the semiempirical Nicolskii-Eisenman equation although it cannot correctly reproduce experimental data if ions of different charges are involved. The recently published self-consistent model that was derived for two ions of any charges is now extended to any number of ions of(More)
Methods have been devised for obtaining gadolinium(III) complexes of the ligands NOTA (1,4,7-triazacyclononane-N,N',N''-triacetic acid), DOTA (1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraacetic acid), TETA (1,4,8,11-tetraazacyclotetradecane-N,N',N'',N'''-tetraacetic acid), and DTPA (diethylenetriaminepentaacetic acid) as solids for use as(More)
Lipophilic inert electrolytes, i.e., salts without ion-exchange properties, may influence the selectivity of ionophore-based liquid membrane electrodes by affecting the activity coefficients in the organic phase. It is expected by a theoretical model that the addition of a lipophilic salt renders the ion-selective electrode more selective for divalent over(More)
Tunable diode laser absorption spectroscopy (TDLAS) is an excellent analytical technique for gas sensing applications. In situ sensing of relevant hydrocarbon gases is of substantial interest for a variety of in-field scenarios including environmental monitoring and process analysis, ideally providing accurate, molecule specific, and rapid information with(More)
Gadolinium cryptelates are complexes of a lanthanide metal ion with amino acids of macrocyclic polyamines. These compounds are water soluble and possess reduced relaxation properties similar to Gd diethylene triamine pentaacetic acid (DTPA). Three Gd cryptelates (Gd NOTA, DOTA, TETA) were evaluated. Gadolinium DOTA is the most stable Gd complex with a(More)
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