Analysis of complex mixtures with benchtop nuclear magnetic resonance: Solvent suppression with T and diffusion filters.

Benchtop nuclear magnetic resonance (NMR) spectrometers are being employed in a wide variety of applications from undergraduate teaching and research in academia to quality control and process monitoring in industrial settings. Incorporating benchtop NMR in some of these applications presents opportunities for new practical uses of the technology and challenges that truly test the capabilities of compact NMR spectrometers. For instance, the use of protonated solvents in manufacturing or process monitoring requires separating and quantitating the analyte signals of interest from the strong (overwhelming) response from the solvents.

[General practitioner-centered care: a model with potential for improvement?].

General practitioner (GP)-centered care was introduced into outpatient care on the basis of the GKV Modernisation Acts (GKV, gesetzliche Krankenversicherung: German statutory health insurance) of 2004 and 2007. These are predominantly selective contracts according to § 73b of the German Social Code (Sozialgesetzbuch, SGB) V, which are signed between management companies such as the German GP Contract Association (Hausärztliche Vertragsgemeinschaft, HÄVG ) and the health insurance funds. The latter are obliged to enter into contracts, while participation by contracted physicians and patients is voluntary.

14N nuclear quadrupole resonance of some sulfa drugs.

The 14N nuclear quadrupole double resonance spectra of different polymorphs of sulfanilamide, sulfadiazine, sulfamerazine and sulfamethazine have been measured and the 14N quadrupole coupling tensors have been determined. The obtained 14N spectra are compared with those of other sulfa drugs like sulfathiazole. It is shown that different polymorphs can be easily discriminated.