Disclosed is an optical fiber cable that includes optical fibers and a deformable coupling element enclosed within a buffer tube. The invention provides a method for producing a compound represented by formula : alkyl group or a aryl group; and R2 represents a alkoxycarbonyl group, a aralkyloxycarbonyl group, a aliphatic acyl group, or a aromatic acyl group), which includes treating a compound represented by formula : alkyl group, or a aralkyl group) under a hydrogen gas atmosphere in the presence of a metallic catalyst. Subsequently a second metal layer is deposited by electrolytic means on the first metal layer and on the adhesion layer so as to cover most of the first layer with the exception of at least one passage per microsystem, providing access to the first layer. These measurements are then averaged to generate a representation of the transient fluorescent decay response unique to the fluorophores. The fluid passageways and the flow opening are oriented relative to each other such that a portion of a flow through the valve assembly is directed into the fluid passageways and a portion of the flow is directed through the flow opening when the closure element is in the fully open position.