immature teeth have a large apical opening and thin divergent or parallel dentinal walls; hence, with conventional needle irrigation there is a very high possibility of extrusion. this study was done to compare the apical extrusion of naocl in an immature root delivered using endovac and needle irrigation.eighty freshly extracted maxillary central incisors were decoronated followed by access ca...

Legume root nodules are induced by N-fixing rhizobium bacteria that are hosted in an intracellular manner. These nodules are formed by reprogramming differentiated root cells. The model legumeMedicago truncatula forms indeterminate nodules with a meristem at their apex. This organ grows by the activity of the meristem that adds cells to the different nodule tissues. In Medicago sativa it has be...

In the title compound, {[Sr(C(6)H(2)N(2)O(4))(H(2)O)(2)]·H(2)O}(n), the Sr(II) ions are bridged by the pyrazine-2,3-dicarboxyl-ate ligands with the formation of two-dimensional polymeric layers parallel to the ac plane. Each Sr(II) ion is eight-coordinated by one N and five O atoms from the four ligands and two water mol-ecules. The coordination polyhedron is derived from a penta-gonal bipyrami...

What are the effects of snow fence variables on wind patterns, and geometry and volume of snow collected in drifts? This question arose from a need to capture winter’s blowing snow to improve water supply during a drought and to protect critical areas from blowing snow. Last year, during the first phase of this project, various powders were tested to find which would closely replicate snow in a...

variations in arterial anatomy are less frequent, contrary to the venous system, and most of these variations affect visceral arteries. variations in the brachial artery are the most frequently reported and so far a minimum of six different patterns have been described. the most common of these patterns is the superficial brachial artery, which lies superficially to the median nerve. much less ...