The aim of this study was to investigate the marginal fit of posterior fixed partial dentures (FPDs) made with 2 computer-aided design/computer-assisted manufacture systems--Procera Bridge Zirconia (Nobel Biocare) and Lava AllCeramic System (3M ESPE)--and to analyze the differences between abutments and between buccal and lingual surfaces. Twenty standardized specimens were prepared to receive ...

Abstract A method for analysing the vehicle–bridge interaction system with enhanced objectivity is proposed in paper, which considers time-variant and random characteristics allows finding power spectral densities (PSDs) of responses directly from PSD track irregularity. The pseudo-excitation adopted framework, where vehicle modelled as a rigid body bridge using finite element method. vertical ...

The mechanism by which the cAMP receptor protein (CRP) activates transcription has been investigated using the lac promoter of Escherichia coli. For transcription activation, an interaction between DNA-bound CRP and RNA polymerase is not sufficient. CRP must bind to a site in the same DNA and close to the promoter. CRP action requires an intact spacer DNA to provide a rigid support in building ...