Spatially resolved fluoroalkylation and alkylation of graphene by direct laser writing.

Two classes of photoactive compounds containing fluoroalkyl- and alkyl silver carboxylates were utilized for graphene laser writing, affording a set of patterned graphene architectures bearing various functionalities. The laser patterning of graphene is accomplished by using laser-triggered decomposition of silver carboxylates to generate radicals confined to the irradiated area for the selective binding of graphene.

Peptic ulcer frequency differences related to h. Pylori or aines.

Background: Peptic ulcer etiology has been changing because of H. pylori decline.

Objectives: To estimate peptic ulcer prevalence in 10 years-interval and compare the association with H.