introduction: the purpose of this study was to compare the ability of proroot mineral trioxide aggregate (pmta) and root mineral trioxide aggregate (rmta) as root-end filling materials, and portland cement (pc) to prevent bacterial leakage through filled root end cavities. materials and methods: fifty-one extracted human single rooted teeth were cleaned and shaped using a step back technique. t...

Emergence of the newly identified 16S rRNA methylases RmtA, RmtB, and ArmA in pathogenic gram-negative bacilli has been a growing concern. ArmA, which had been identified exclusively in Europe, was also found in several gram-negative pathogenic bacilli isolated in Japan, suggesting global dissemination of hazardous multiple aminoglycoside resistance genes.

Background and aims. Bonding of composite resin filling materials to pulp protecting agents produces an adhesive joint which is important for the quality of filling as well as success of restoration. We aimed to assess the bond strength of composite resin to three pulp capping biomaterials: Pro Root mineral trioxide aggregate (PMTA), Root MTA (RMTA) and calcium enriched mixture (CEM) cement, us...

background and aims: we aimed to assess the bond strength of composite resin to three pulp capping biomaterials; proroot mineral trioxide aggregate (pmta), root mta (rmta) and calcium enriched mixture (cem), using three bonding systems [a total etch (single bond) and two self-etch systems (protect bond and se bond)]. materials and methods: ninety acrylic moulds containing a 6×2 mm hole were div...

Methylation of RNA by methyltransferases is a phylogenetically ubiquitous post-transcriptional modification that occurs most extensively in transfer RNA (tRNA) and ribosomal RNA (rRNA). Biochemical characterization of RNA methyltransferase enzymes and their methylated product RNA or RNA-protein complexes is usually done by measuring the incorporation of radiolabeled methyl groups into the produ...

VANETs has emerged as the new network environment for intelligent transportations systems. In this paper, we focus on two types of VANET applications and evaluate the effectiveness of our data dissemination protocol for these two types of applications. In particular, we investigate traffic monitoring (TM) and roadside message transfer (RMT) applications. The traffic monitoring application (TMA)...