Die nephelometrische Sulfatbestimmung in Trinkwasser

Zusammenfassung Es wird eine nephelometrische Methode zur Bestimmung von Sulfat in Trinkwasser beschrieben.     

Eine empfindliche Reaction auf Weinsteins?ure

Ohne Zusammenfassung     

Zur Bestimmung des Fruchtsaftgehaltes in Tafelgetr?nken

Ohne Zusammenfassung     

Dynamics of peptidergic secretory granule transport are regulated by neuronal stimulation

Background  

Peptidergic neurons store and secrete the contents of large dense core vesicles (LDCVs) from axon terminals and from dendrites. Secretion of peptides requires a highly regulated exocytotic mechanism, plus coordinated synthesis and transport of LDCVs to their sites of release. Although these trafficking events are critical to function, little is known regarding the dynamic behavior of LDCVs and the mechanisms by which their transport is regulated. Sensory neurons also package opiate receptors in peptide-containing LDCVs, which is thought to be important in pain sensation. Since peptide granules cannot be refilled locally after their contents are secreted, it is particularly important to understand how neurons support regulated release of peptides.     

The synthesis of tethered ligand dimers for PPARgamma-RXR protein heterodimers

Heterodimeric compounds based on tethering the PPARgamma agonist Rosiglitazone to the RXR ligand Targretin have been prepared.     

A wave-particle delayed-choice experiment with a single-photon state

We perform a new wave-particle delayed-choice experiment which uses photon pairs produced by parametric fluorescence. One of the photons of a pair serves as a trigger photon, the other one traverses a Mach-Zehnder ring interferometer. The trigger photon switches the interferometer between registration of either pathway information or phase information for the second photon. The result turns out to be independent of whether the switching process takes place before or after the photon passes the first beamsplitter of the interferometer.     

High-performance liquid chromatographic determination of the binding of ceftriaxone to human serum albumin solution and albumin from diluted human serum

The binding of ceftriaxone to human serum albumin has been studied by high-performance liquid chromatography. The gel permeation method of Hummel and Dreyer was used. Ceftriaxone was tested with two sources of albumin (aqueous solution and diluted serum). After internal calibration the binding parameters were determined for each albumin, and results compared. These data are in agreement with those from classical methods for the determination of protein binding of ceftriaxone.