quasicrystals are a group of materials with the quasi-periodic structure, and since their discovery in 1980 their specially interesting physical properties have attracted the attention of many researchers. the lack of translational periodicity makes the numerical calculations of their physical properties much more difficult than the crystalline solids. in this work we present a detailed numeric...

OBJECTIVES 1. To determine the in vitro antibacterial effectiveness of the orthodontic bonding Transbond XT (3M Unitek) and four self-etching adhesives with possible use in orthodontic bonding (Clearfil Protect Bond, CPB; Clearfil Self-etching Bond, CSB; Transbond Plus Self-Etching Primer, TSEP; iBond) against Streptococcus mutans and Lactobacillus gasseri in order to compare that capacity amon...

Recent advances in biotechnology promoted evolution in the general study of life sciences, and more specifically, in the study of biomineralization. Here I review information from recently developed studies on molecular and cellular aspects of molluscan shell nacreous layer formation. First, I summarize the primary and tertiary structures of the organic matrix (OM) proteins recently identified ...

BACKGROUND AND OBJECTIVES The aim of this study was to compare internal anatomy between first and second mandibular premolars and to study different percentage variations of root canal morphology of mandibular premolars in Gujarat population based on Vertucci's classification by clearing technique. METHODOLOGY A total of 80 extracted intact permanent mandibular premolars (40 each mandibular f...