The Rheological and Structural Properties of Aqueous Graphene Oxide Dispersions: Concentration and pH Dependence.

A modified Hummer's method was used to synthesize aqueous dispersions of graphene oxide (GO). The morphology, chemical structure, and exfoliation state of GO were analyzed by combining scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The structural and rheological properties of the GO dispersions were studied as a function of GO concentration and pH.

A rifampicin-containing antibiotic treatment improves outcome of staphylococcal deep sternal wound infections.

Background: Deep sternal wound infection (DSWI) is a severe complication after cardiac surgery, mostly caused by staphylococci. Little is known about the optimal antibiotic management.

Methods: A 10 year retrospective analysis of 100 patients with staphylococcal DSWI after cardiac surgery in a tertiary hospital.