The effect of A-block polydispersity on the phase behavior of AB-diblock copolymer melts is examined using a complete self-consistent field theory treatment that allows for fractionation of the parent molecular-weight distribution. In addition to observing the established shift in phase boundaries, we find the emergence of significant two-phase coexistence regions causing, for instance, the dis...

The purpose of this study was to evaluate color stability of two dental ceramics cemented with two resin cements, assessing the color difference (ΔE00) by the measurement of L*, a*, b*, c* and h* of transmittance. The combination of two ceramic system (feldspathic and lithium disilicate) and two resin cements - color A3 (RelyX ARC and Variolink II) resulted in 4 groups (n=5). Ten disks-shaped s...

OBJECTIVES This study investigated the effect of extreme cooling methods on the flexural strength, reliability and shear bond strength of veneer porcelain for zirconia. METHODS Vita VM9 porcelain was sintered on zirconia bar specimens and cooled by one of the following methods: inside a switched-off furnace (slow), at room temperature (normal) or immediately by compressed air (fast). Three-po...

Concentrations of various proteins in uterine flushings have been described as a direct method for assessment of the secretory activity of the endometrium. We investigated levels of the endometrial protein known as placental protein 14 (PP14) in flushings obtained from 271 infertile women. Under transvaginal ultrasonographic control, 2 ml of 0.154 M sodium chloride solution were injected into t...

In June 2006, two populations of Dactylorhiza were examined at Moses Gate Country Park, in Greater Manchester, to determine whether variation exists between the two populations. Careful measurements of orchid characteristics were taken at both sites, in addition to soil pH recordings, and the results compared and tested for significance using one-way ANOVA and Chi-square significance tests. Des...

This research is to provide a solution of one-way ANOVA without using transformation when variances are heteroscedastic and group sizes are unequal. Parametric boothstrap test (Krishnamoorthy, Lu, & Mathew, 2007) has been shown to be competitive with many other methods when testing the equality of group means. We extend the parametric bootstrap algorithm to a multiple comparison procedure. Simu...