Herbert Mayr

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BACKGROUND Accurate prediction of survival to hospital discharge in patients who achieve return of spontaneous circulation after cardiopulmonary resuscitation (CPR) has significant ethical and socioeconomic implications. We investigated the prognostic performance of serum neuron-specific enolase (NSE), a biochemical marker of ischemic brain injury, after(More)
The kinetics of the reactions of 26 primary and secondary amines with benzhydrylium ions in water were investigated photometrically. Because the parallel reactions of the benzhydrylium ions with hydroxide and water are much slower, the second-order rate constants for the reactions of amines with benzhydrylium ions could be determined reliably. Reactivities(More)
Equilibria for the reactions of benzhydryl cations (Ar2CH(+)) with phosphines, tert-amines, pyridines, and related Lewis bases were determined photometrically in CH2Cl2 and CH3CN solution at 20 °C. The measured equilibrium constants can be expressed by the sum of two parameters, defined as the Lewis Acidity (LA) of the benzhydrylium ions and the Lewis(More)
The kinetics of the reactions of different heterocyclic anions derived from imidazoles, purines, pyrimidines, and related compounds with benzhydrylium ions and structurally related quinone methides have been studied in DMSO and water. The second-order rate constants (log k(2)) correlated linearly with the electrophilicity parameters E of the electrophiles(More)
The kinetics of the reactions of amino acids with stabilized diarylcarbenium ions (Ar(2)CH(+)) have been studied photometrically in aqueous solution at variable pH. In the range of 10.5 < pH < 12, the amino acids react much faster than the competing nucleophiles hydroxide and water. Though the pK(aH) values of the amino acids vary by almost four units, the(More)
Sowohl die klinische Einschätzung der Genese von Thoraxschmerzen als auch die weitere nichtinvasive Diagnostik ist je nach gewählter Untersuchungsmethode in 10–30% nicht schlüssig und weist eine Sensitivität für die Feststelung einer koronaren Herzkrankheit von 60–85% auf. Die Koronarangiographie gilt als “Goldstandard” für die Darstellung der(More)
Alleinige perkutane transluminale Koronarangioplastie (PTCA) bei Patienten mit refraktärer instabiler Angina pectoris weist im Vergleich zu Patienten mit stabiler Angina pectoris ein erhöhtes Risiko für das Auftreten von Komplikationen (Tod, Myokardinfarkt, Notfall-Bypassoperation und Restenose) auf. Die Einführung des Koronarstents hat jedoch sowohl die(More)
The acetylation of tert-butanol with acetic anhydride catalyzed by 4-(dimethylamino)pyridine (DMAP) has been studied at the Becke3 LYP/6-311 + G(d,p)//Becke3 LYP/6-31G(d) level of theory. Solvent effects have been estimated through single-point calculations with the PCM/UAHF solvation model. The energetically most favorable pathway proceeds through(More)