Graphene oxide nanocolloids.

Graphene oxide (GO) nanocolloids-sheets with lateral dimension smaller than 100 nm-were synthesized by chemical exfoliation of graphite nanofibers, in which the graphene planes are coin-stacked along the length of the nanofibers. Since the upper size limit is predetermined by the diameter of the nanofiber precursor, the size distribution of the GO nanosheets is much more uniform than that of common GO synthesized from graphite powders. The size can be further tuned by the oxidation time.

Return to work after uncomplicated myocardial infarction: a trial of practice guidelines in the community.

Objective: To evaluate the effectiveness of practice guidelines for return to work after acute myocardial infarction when disseminated from a university-based setting to a practice-based setting.

Design: Randomized clinical trial.

Patients: A total of 187 patients with uncomplicated acute myocardial infarction.

Cardiac rehabilitation. Current status and future directions.

Comprehensive cardiac rehabilitation is more than exercise training for patients with coronary artery disease and now includes all aspects of secondary prevention. Exercise training is individually prescribed based on clinical status and therapeutic goals. Smoking cessation and abstinence and the treatment of hypercholesterolemia are integral to the rehabilitation process.