The purpose of the present study was to compare the shear bond strength to human dentin of 2 root canal sealers: Sultan U/P (zinc-oxide euge nol) and 2seal (epoxy resin). The dentin specimens were divided randomly into 2 groups (A, B) of 12 specimens each, and etched with 3 ml of EDTA 17% before rinsing with NaOCl 2.5% and distilled water. The 2 sealers were mixed according to the manufacturer ...

In 1996, Pulak and Al-Sultan presented a rectifying inspection plan for determining the optimum process mean. However, they did not consider the quality cost for the product within the specification limits and did not point out whether the non-conforming items in the sample of accepted lot is replaced or eliminated from the lot. In this paper, we propose a modified Pulak and Al-Sultan’s model w...

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We found that rapalog mTOR inhibitors induce G1 arrest in the PTEN-null HS Sultan B-cell lymphoma line in vitro, but that administration of rapalogs in a HS Sultan xenograft model resulted in significant apoptosis, and that this correlated with induction of hypoxia and inhibition of neoangiogenesis and VEGF expression. Mechanistically, rapalogs prevent cap-dependent translation, but studies hav...

Ecological development has been described as “the meeting of developmental biology with the real world” (Gilbert 2001); in other words, the study of development as it occurs in nature and its ecological consequences. One key area in this field is phenotypic plasticity : environment-dependent phenotypic expression (Bradshaw 1965; Schlichting 1986; Sultan 1987, 1995, 2000; Scheiner 1993; Travis 1...